/* roulang page: index */
/* ===================== 设计变量 ===================== */
:root{
  --bg:#F6F4EF;
  --surface:#FFFFFF;
  --surface-alt:#EFEDE6;
  --primary:#12897A;
  --primary-dark:#10564A;
  --primary-deep:#0B2B26;
  --accent:#E9A13C;
  --ink:#14181B;
  --text:#4B555D;
  --muted:#8A939B;
  --line:#E2DFD8;
  --dark:#0F1417;
  --success:#1F8A5B;
  --warn:#C4552E;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-pill:999px;
  --elev-1:0 1px 2px rgba(15,20,23,.05);
  --elev-2:0 10px 30px -12px rgba(15,20,23,.18);
  --ease:240ms cubic-bezier(.2,.7,.3,1);
  --sidebar-w:260px;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Consolas,monospace;
}

/* ===================== 基础重置 ===================== */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;padding:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-size:17px;line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body.is-locked{overflow:hidden}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:color var(--ease)}
button,input,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.16;letter-spacing:-.015em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
figure{margin:0}
::selection{background:var(--accent);color:var(--ink)}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:4px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}

.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:var(--primary);color:#fff;padding:12px 20px;border-radius:0 0 var(--r-sm) 0;
}
.skip-link:focus{left:0}

/* ===================== 容器 ===================== */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 40px}
.section{padding:96px 0}
.section--tight{padding:72px 0}
.section--alt{background:var(--surface-alt)}
section[id]{scroll-margin-top:24px}

/* ===================== 侧边导航（App Shell） ===================== */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
  background:var(--dark);
  display:flex;flex-direction:column;
  padding:24px 16px 20px;
  z-index:60;
  transition:width var(--ease),transform var(--ease);
  overflow-y:auto;
  scrollbar-width:thin;
}
.brand{display:block;padding:6px 8px 18px;border-bottom:1px solid rgba(255,255,255,.09);margin-bottom:18px}
.brand-mark{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:var(--r-sm);
  background:var(--primary);color:#fff;font-weight:800;font-size:20px;
}
.brand-text{display:block}
.brand-line1{display:block;font-size:20px;font-weight:800;color:#fff;letter-spacing:.02em;line-height:1.3}
.brand-line2{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:500;color:var(--primary);letter-spacing:.08em;margin-top:2px}
.brand-line2::after{content:"";flex:1;height:1px;background:var(--primary);opacity:.45}

.nav-list{display:flex;flex-direction:column;gap:2px}
.nav-item{
  position:relative;display:flex;align-items:center;gap:12px;
  padding:11px 12px;border-radius:var(--r-sm);
  color:rgba(255,255,255,.72);font-size:14px;line-height:1.4;
  transition:background var(--ease),color var(--ease);
}
.nav-item::before{
  content:"";position:absolute;left:-16px;top:50%;transform:translateY(-50%);
  width:3px;height:18px;border-radius:0 2px 2px 0;background:transparent;
  transition:background var(--ease);
}
.nav-item:hover{color:#fff;background:rgba(255,255,255,.05)}
.nav-item.active{color:var(--primary);background:rgba(255,255,255,.05);font-weight:600}
.nav-item.active::before{background:var(--primary)}
.nav-ico{
  flex:0 0 22px;width:22px;height:22px;display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:12px;font-weight:700;
  border:1px solid rgba(255,255,255,.18);border-radius:6px;color:inherit;
}
.nav-item.active .nav-ico{border-color:var(--primary);background:rgba(18,137,122,.16)}

.side-foot{margin-top:auto;padding-top:18px;border-top:1px solid rgba(255,255,255,.09)}
.side-cta{
  display:flex;align-items:center;justify-content:center;gap:8px;
  width:100%;padding:12px 16px;border-radius:var(--r-pill);
  background:var(--primary);color:#fff;font-size:14px;font-weight:600;
  transition:background var(--ease),transform var(--ease);
}
.side-cta:hover{background:var(--primary-dark);color:#fff}
.side-cta .arrow{transition:transform var(--ease)}
.side-cta:hover .arrow{transform:translateX(4px)}
.side-contact{margin-top:14px;font-size:12px;line-height:1.7;color:rgba(255,255,255,.5);font-family:var(--mono)}

/* ===================== 顶部栏（移动端） ===================== */
.topbar{
  display:none;align-items:center;justify-content:space-between;gap:12px;
  position:sticky;top:0;z-index:55;height:64px;padding:0 20px;
  background:rgba(15,20,23,.97);
  backdrop-filter:saturate(140%) blur(6px);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.topbar-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:15px;font-weight:700}
.topbar-brand .dot{width:9px;height:9px;border-radius:50%;background:var(--primary);display:block}
.nav-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:var(--r-sm);
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.13);color:#fff;
}
.nav-toggle span{display:block;width:18px;height:2px;background:#fff;position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:#fff;transition:transform var(--ease)
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.drawer-mask{
  position:fixed;inset:0;background:rgba(11,43,38,.55);z-index:58;
  opacity:0;visibility:hidden;transition:opacity var(--ease),visibility var(--ease);
}
.drawer-mask.is-on{opacity:1;visibility:visible}

/* ===================== 主区 ===================== */
.shell{margin-left:var(--sidebar-w);min-height:100vh;transition:margin-left var(--ease)}

/* ===================== 按钮 ===================== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:14px 28px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  transition:background var(--ease),color var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease);
  min-height:46px;
}
.btn .arrow{transition:transform var(--ease)}
.btn:hover .arrow{transform:translateX(4px)}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--elev-1)}
.btn-primary:hover{background:var(--primary-dark);color:#fff;box-shadow:var(--elev-2)}
.btn-ghost{background:transparent;color:var(--ink);border-color:rgba(20,24,27,.24)}
.btn-ghost:hover{border-color:var(--ink);background:rgba(20,24,27,.04);color:var(--ink)}
.btn-light{background:#fff;color:var(--primary-deep)}
.btn-light:hover{background:var(--accent);color:var(--ink)}
.btn-sm{padding:10px 20px;font-size:14px;min-height:40px}
.btn-block{width:100%}
.text-link{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--primary);
  padding-bottom:2px;
}
.text-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform var(--ease);
}
.text-link:hover{color:var(--primary-dark)}
.text-link:hover::after{transform:scaleX(1)}

/* ===================== 徽章 / 标签 ===================== */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:12px;letter-spacing:.14em;
  color:var(--primary);text-transform:uppercase;margin-bottom:20px;
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--primary)}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 12px;
  border-radius:var(--r-pill);border:1px solid var(--primary);
  color:var(--primary);font-size:12px;font-weight:600;letter-spacing:.02em;
}
.tag-solid{background:var(--accent);border-color:var(--accent);color:var(--ink)}
.section-head{max-width:760px;margin-bottom:48px}
.section-head h2{font-size:38px;letter-spacing:-.02em}
.section-head p{margin-top:16px;color:var(--text);font-size:17px}
.section-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;max-width:none;flex-wrap:wrap}

/* ===================== 首屏 ===================== */
.hero{padding:88px 0 72px;position:relative;overflow:hidden}
.hero::before{
  content:"";position:absolute;right:-140px;top:-120px;width:420px;height:420px;
  border-radius:50%;background:radial-gradient(circle,rgba(18,137,122,.10),rgba(18,137,122,0) 68%);
  pointer-events:none;
}
.hero-grid{display:grid;grid-template-columns:6fr 6fr;gap:56px;align-items:center;position:relative}
.hero h1{
  font-size:clamp(38px,4.4vw,58px);
  line-height:1.1;letter-spacing:-.025em;font-weight:800;
  color:var(--primary-deep);
}
.hero h1 em{font-style:normal;display:block;color:var(--primary)}
.hero-sub{margin-top:24px;font-size:18px;line-height:1.85;color:var(--text);max-width:31em}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  margin-top:48px;border-top:1px solid var(--line);padding-top:24px;
}
.hero-stats li{padding-right:16px;border-right:1px solid var(--line)}
.hero-stats li:last-child{border-right:0}
.hero-stats .num{
  display:block;font-family:var(--mono);font-size:26px;font-weight:700;color:var(--primary-deep);line-height:1.2;
}
.hero-stats .lbl{display:block;font-size:13px;color:var(--muted);margin-top:4px;line-height:1.5}

.hero-figure{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  aspect-ratio:16/9;box-shadow:var(--elev-2);background:var(--dark);
}
.hero-figure img{width:100%;height:100%;object-fit:cover}
.hero-figure::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(200deg,rgba(11,43,38,.14) 0%,rgba(11,43,38,.62) 58%,rgba(11,43,38,.86) 100%);
}
.hero-badge{
  position:absolute;left:20px;bottom:20px;z-index:2;
  display:inline-flex;align-items:center;gap:10px;
  background:rgba(246,244,239,.96);color:var(--primary-deep);
  padding:10px 16px;border-radius:var(--r-pill);font-size:13px;font-weight:600;
  box-shadow:var(--elev-1);
}
.hero-badge .mono{color:var(--primary);font-size:12px}

/* ===================== 卖点 ===================== */
.feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px 56px}
.feature{
  display:grid;grid-template-columns:72px 1fr;gap:0 4px;
  padding:28px 0;border-top:1px solid var(--line);
  transition:border-color var(--ease);
}
.feature:hover{border-top-color:var(--primary)}
.feature-num{
  font-family:var(--mono);font-size:30px;font-weight:700;color:var(--accent);
  line-height:1;letter-spacing:-.02em;padding-top:2px;
}
.feature h3{font-size:20px;font-weight:700;color:var(--ink)}
.feature p{margin-top:10px;font-size:15px;line-height:1.8;color:var(--text)}
.feature:nth-child(even){padding-top:36px}

/* ===================== 演示 ===================== */
.demo-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center}
.demo-figure{
  position:relative;border-radius:var(--r-lg);overflow:hidden;aspect-ratio:4/3;
  box-shadow:var(--elev-2);background:var(--surface-alt);
}
.demo-figure img{width:100%;height:100%;object-fit:cover}
.demo-figure figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:20px 22px;
  background:linear-gradient(to top,rgba(11,43,38,.86),rgba(11,43,38,0));
  color:#fff;font-size:13px;line-height:1.6;
}
.demo-steps{counter-reset:step}
.demo-step{
  display:grid;grid-template-columns:56px 1fr;gap:18px;
  padding:22px 0;border-bottom:1px solid var(--line);
}
.demo-step:first-child{border-top:1px solid var(--line)}
.demo-step .idx{
  font-family:var(--mono);font-size:15px;font-weight:700;color:#fff;
  background:var(--primary);width:40px;height:40px;border-radius:var(--r-sm);
  display:flex;align-items:center;justify-content:center;
}
.demo-step h3{font-size:18px}
.demo-step p{margin-top:6px;font-size:15px;color:var(--text);line-height:1.75}

/* ===================== 最新信息 ===================== */
.news-list{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.news-item{
  display:flex;flex-direction:column;gap:0;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:26px 26px 22px;box-shadow:var(--elev-1);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
  height:100%;
}
.news-item:hover{transform:translateY(-2px);box-shadow:var(--elev-2);border-color:var(--primary)}
.news-cat{
  display:inline-flex;align-self:flex-start;align-items:center;height:22px;padding:0 10px;
  border-radius:var(--r-pill);background:rgba(18,137,122,.10);color:var(--primary);
  font-size:12px;font-weight:600;margin-bottom:14px;
}
.news-item h3{font-size:19px;line-height:1.5;color:var(--ink);transition:color var(--ease)}
.news-item:hover h3{color:var(--primary-dark)}
.news-item p{margin-top:10px;font-size:14px;line-height:1.75;color:var(--text);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{
  display:flex;align-items:center;gap:14px;margin-top:auto;padding-top:18px;
  font-family:var(--mono);font-size:12px;color:var(--muted);
  border-top:1px dashed var(--line);margin-top:18px;
}
.news-meta .c{color:var(--primary)}
.news-empty{
  grid-column:1/-1;background:var(--surface);border:1px dashed var(--line);
  border-radius:var(--r-md);padding:48px 24px;text-align:center;color:var(--muted);font-size:15px;
}

/* ===================== 证据 ===================== */
.proof-grid{display:grid;grid-template-columns:5fr 7fr;gap:64px;align-items:start}
.proof-copy h2{font-size:36px;letter-spacing:-.02em}
.proof-copy p{margin-top:18px;color:var(--text);font-size:16px;line-height:1.85}
.proof-list{display:grid;gap:0}
.proof-item{
  display:grid;grid-template-columns:26px 1fr;gap:16px;align-items:start;
  padding:20px 0;border-bottom:1px solid var(--line);
}
.proof-item:first-child{border-top:1px solid var(--line)}
.proof-item .tick{
  width:22px;height:22px;border-radius:50%;background:rgba(31,138,91,.12);
  color:var(--success);display:flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:700;margin-top:4px;
}
.proof-item strong{display:block;font-size:16px;font-weight:600;color:var(--ink)}
.proof-item span{display:block;font-size:14px;color:var(--text);margin-top:2px;line-height:1.7}
.proof-note{
  margin-top:32px;font-size:13px;color:var(--muted);font-family:var(--mono);
  letter-spacing:.02em;padding-top:20px;border-top:1px solid var(--line);
}

/* ===================== 方案 ===================== */
.plan-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch}
.plan{
  display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:32px 28px;box-shadow:var(--elev-1);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.plan:hover{transform:translateY(-2px);box-shadow:var(--elev-2);border-color:var(--primary)}
.plan h3{font-size:20px;margin-bottom:6px}
.plan .who{font-size:13px;color:var(--muted)}
.plan .price{
  font-family:var(--mono);font-size:30px;font-weight:700;color:var(--primary-deep);
  margin:20px 0 4px;line-height:1.1;
}
.plan .price small{font-size:13px;font-weight:500;color:var(--muted);margin-left:6px;font-family:var(--sans)}
.plan ul{margin:24px 0 28px;display:grid;gap:12px}
.plan li{position:relative;padding-left:22px;font-size:14px;line-height:1.7;color:var(--text)}
.plan li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:2px;
  background:var(--primary);opacity:.55;
}
.plan .btn{margin-top:auto}
.plan--featured{
  background:var(--primary-deep);border-color:var(--primary-deep);color:#fff;
  box-shadow:var(--elev-2);
}
.plan--featured h3,.plan--featured .price{color:#fff}
.plan--featured .who{color:rgba(255,255,255,.62)}
.plan--featured li{color:rgba(255,255,255,.82)}
.plan--featured li::before{background:var(--accent);opacity:1}
.plan--featured .price small{color:rgba(255,255,255,.6)}
.plan--featured:hover{border-color:var(--accent)}
.plan-badge{
  align-self:flex-start;display:inline-flex;align-items:center;height:24px;padding:0 12px;
  border-radius:var(--r-pill);background:var(--accent);color:var(--ink);
  font-size:12px;font-weight:700;margin-bottom:16px;
}

/* ===================== FAQ ===================== */
.faq-wrap{max-width:880px}
.faq-item{border-top:1px solid var(--line)}
.faq-item:last-child{border-bottom:1px solid var(--line)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  list-style:none;cursor:pointer;padding:22px 4px;
  font-size:18px;font-weight:600;color:var(--ink);
  transition:color var(--ease),background var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";flex:0 0 auto;font-family:var(--mono);font-size:22px;font-weight:400;
  color:var(--primary);line-height:1;transition:transform var(--ease);
}
.faq-item[open] summary::after{content:"−"}
.faq-item summary:hover{color:var(--primary)}
.faq-item .faq-body{
  padding:0 4px 24px 16px;color:var(--text);font-size:15px;line-height:1.85;
  animation:fadeIn var(--ease) both;
}
@keyframes fadeIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

/* ===================== 结尾 CTA ===================== */
.cta-band{
  background:var(--dark);color:#fff;border-radius:var(--r-lg);
  padding:64px 56px;display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;
  position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;right:-100px;bottom:-140px;width:380px;height:380px;
  border-radius:50%;background:radial-gradient(circle,rgba(233,161,60,.18),rgba(233,161,60,0) 70%);
}
.cta-band h2{font-size:34px;line-height:1.25;letter-spacing:-.02em;position:relative}
.cta-band p{margin-top:16px;color:rgba(255,255,255,.7);font-size:16px;line-height:1.8;position:relative}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end;position:relative}
.cta-actions .btn-ghost{color:#fff;border-color:rgba(255,255,255,.32)}
.cta-actions .btn-ghost:hover{background:rgba(255,255,255,.1);color:#fff;border-color:#fff}

/* ===================== 表单（联系区） ===================== */
.form-grid{display:grid;gap:16px}
.field label{display:block;font-size:14px;color:rgba(255,255,255,.66);margin-bottom:8px}
.field input,.field textarea{
  width:100%;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.18);
  border-radius:var(--r-sm);padding:12px 14px;font-size:15px;color:#fff;
  transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.field input::placeholder,.field textarea::placeholder{color:rgba(255,255,255,.34)}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);background:rgba(255,255,255,.1);
  box-shadow:0 0 0 3px rgba(18,137,122,.28);
}

/* ===================== 页脚 ===================== */
.footer{background:var(--dark);color:rgba(255,255,255,.7);padding:72px 0 0;margin-top:96px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:48px}
.footer h4{font-size:14px;color:#fff;letter-spacing:.06em;margin-bottom:20px;font-weight:600}
.footer-brand .brand-line1{font-size:19px}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.6);max-width:24em}
.footer ul{display:grid;gap:12px}
.footer a{font-size:14px;color:rgba(255,255,255,.68)}
.footer a:hover{color:var(--primary)}
.footer-contact p{font-size:14px;line-height:1.9;color:rgba(255,255,255,.66)}
.footer-contact .mono{color:var(--accent);font-size:13px}
.footer-bottom{
  margin-top:56px;border-top:1px solid rgba(255,255,255,.1);
  padding:22px 0 28px;display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.44);
}
.footer-bottom .mono{font-size:12px;color:rgba(255,255,255,.34)}

/* ===================== 浮动 CTA ===================== */
.fab{
  position:fixed;right:32px;bottom:32px;z-index:50;
  display:inline-flex;align-items:center;gap:10px;
  background:var(--primary);color:#fff;font-size:14px;font-weight:600;
  padding:14px 24px;border-radius:var(--r-pill);box-shadow:var(--elev-2);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity var(--ease),transform var(--ease),visibility var(--ease),background var(--ease);
}
.fab.is-on{opacity:1;visibility:visible;transform:none}
.fab:hover{background:var(--primary-dark);color:#fff}
.fab .arrow{transition:transform var(--ease)}
.fab:hover .arrow{transform:translateX(4px)}

/* ===================== 入场动画 ===================== */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 520ms cubic-bezier(.2,.7,.3,1),transform 520ms cubic-bezier(.2,.7,.3,1)}
.reveal.is-in{opacity:1;transform:none}

/* ===================== 响应式：992–1199 收窄侧栏 ===================== */
@media (max-width:1199px) and (min-width:992px){
  :root{--sidebar-w:88px}
  .brand{display:flex;justify-content:center;padding:6px 0 18px}
  .brand-text{display:none}
  .brand-mark{display:flex}
  .nav-label{display:none}
  .nav-item{justify-content:center;padding:13px 0}
  .nav-item::before{left:-16px}
  .side-foot{display:none}
  .hero-grid{gap:40px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
}

/* ===================== 响应式：<=991 抽屉导航 ===================== */
@media (max-width:991px){
  .sidebar{
    width:288px;max-width:86vw;padding:20px 16px;
    transform:translateX(-100%);box-shadow:none;
  }
  .sidebar.is-open{transform:translateX(0);box-shadow:0 0 60px rgba(0,0,0,.45)}
  .brand{display:block;padding:6px 8px 18px}
  .brand-text{display:block}
  .brand-mark{display:none}
  .nav-label{display:inline}
  .nav-item{justify-content:flex-start;padding:12px 12px;font-size:15px}
  .nav-item::before{left:-16px}
  .side-foot{display:block}
  .topbar{display:flex}
  .shell{margin-left:0}
  body{padding-bottom:72px}

  .container{padding:0 24px}
  .section{padding:64px 0}
  .section--tight{padding:52px 0}

  .hero{padding:48px 0 56px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-sub{font-size:16.5px;max-width:none}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:20px 0;margin-top:36px}
  .hero-stats li:nth-child(2){border-right:0}
  .hero-stats li{padding-right:12px}

  .section-head h2{font-size:28px}
  .section-head{margin-bottom:36px}
  .feature-grid{grid-template-columns:1fr;gap:0}
  .feature{padding:22px 0}
  .feature:nth-child(even){padding-top:22px}
  .feature-num{font-size:24px}
  .feature h3{font-size:18px}

  .demo-grid{grid-template-columns:1fr;gap:32px}
  .news-list{grid-template-columns:1fr}

  .proof-grid{grid-template-columns:1fr;gap:32px}
  .proof-copy h2{font-size:27px}

  .plan-grid{grid-template-columns:1fr;gap:16px}
  .plan{padding:28px 24px}

  .cta-band{grid-template-columns:1fr;gap:28px;padding:40px 28px;border-radius:var(--r-md)}
  .cta-band h2{font-size:26px}
  .cta-actions{justify-content:flex-start}

  .footer{padding:56px 0 0;margin-top:64px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1/-1}

  .fab{
    left:0;right:0;bottom:0;justify-content:center;border-radius:0;
    padding:16px 20px;font-size:15px;transform:translateY(100%);height:60px;
  }
  .fab.is-on{transform:none}
}

/* ===================== 响应式：<=520 手机 ===================== */
@media (max-width:520px){
  body{font-size:16px}
  .container{padding:0 18px}
  .hero h1{font-size:32px;line-height:1.18}
  .hero-actions{gap:10px}
  .btn{width:100%}
  .hero-actions .btn{width:100%}
  .hero-stats .num{font-size:22px}
  .section-head h2{font-size:24px}
  .cta-band{padding:32px 20px}
  .cta-band h2{font-size:22px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .faq-item summary{font-size:16px;padding:18px 2px}
  .news-item{padding:20px}
}

/* ===================== 减弱动效 ===================== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --paper:#F6F4EF;
  --card:#FFFFFF;
  --tint:#EFEDE6;
  --brand:#12897A;
  --brand-deep:#10564A;
  --brand-ink:#0B2B26;
  --accent:#E9A13C;
  --ink:#14181B;
  --ink-2:#4B555D;
  --ink-3:#8A939B;
  --line:#E2DFD8;
  --dark:#0F1417;
  --ok:#1F8A5B;
  --warn:#C4552E;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-pill:999px;
  --e1:0 1px 2px rgba(15,20,23,.05);
  --e2:0 10px 30px -12px rgba(15,20,23,.18);
  --t:240ms cubic-bezier(.2,.7,.3,1);
  --sidebar-w:260px;
  --mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:17px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
@media (max-width:767px){ body{padding-bottom:60px} }
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none;transition:color var(--t)}
a:hover{color:var(--brand-deep)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.2;font-weight:700;color:var(--ink)}
p{margin:0 0 16px}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.mono{font-family:var(--mono);letter-spacing:.02em}

/* ---------- App shell ---------- */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  background:var(--dark);
  color:#fff;
  padding:28px 20px;
  display:flex;flex-direction:column;gap:24px;
  z-index:50;
  transition:width var(--t),transform var(--t);
  border-right:1px solid rgba(255,255,255,.06);
}
.logo{
  display:flex;flex-direction:column;gap:2px;
  text-decoration:none;position:relative;padding-left:2px;
}
.logo .brand-line1{
  display:block;font-size:22px;font-weight:800;color:#fff;letter-spacing:.02em;line-height:1.2;
}
.logo .brand-line2{
  display:block;font-size:16px;font-weight:500;color:var(--brand);letter-spacing:.18em;line-height:1.3;
}
.logo::after{
  content:"";display:block;width:38px;height:2px;background:var(--brand);margin-top:10px;border-radius:2px;
}
.logo-mark{
  display:none;width:44px;height:44px;border-radius:var(--r-sm);
  background:var(--brand);color:#fff;font-size:20px;font-weight:800;
  align-items:center;justify-content:center;
}
.nav-list{display:flex;flex-direction:column;gap:4px;margin-top:8px}
.nav-item{
  display:flex;align-items:center;gap:12px;
  padding:11px 12px 11px 12px;
  border-radius:var(--r-sm);
  color:rgba(255,255,255,.72);
  font-size:14px;line-height:1.4;
  position:relative;
  transition:background var(--t),color var(--t);
  min-height:44px;
}
.nav-item::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:18px;border-radius:2px;background:transparent;transition:background var(--t);
}
.nav-item:hover{background:rgba(255,255,255,.05);color:#fff}
.nav-item.active{background:rgba(255,255,255,.06);color:var(--brand)}
.nav-item.active::before{background:var(--brand)}
.nav-ico{
  font-family:var(--mono);font-size:11px;color:rgba(255,255,255,.35);
  letter-spacing:.06em;flex:0 0 auto;
}
.nav-item.active .nav-ico{color:var(--brand)}
.nav-label{flex:1 1 auto}
.sidebar-foot{margin-top:auto;display:flex;flex-direction:column;gap:14px}
.sidebar-foot .foot-text{font-size:12px;color:rgba(255,255,255,.45);line-height:1.7;letter-spacing:.02em}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
  min-height:44px;text-align:center;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-deep);color:#fff}
.btn-primary .arrow{transition:transform var(--t)}
.btn-primary:hover .arrow{transform:translateX(4px)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff}
.btn-light{background:#fff;color:var(--brand-ink)}
.btn-light:hover{background:var(--tint);color:var(--brand-ink)}
.btn-block{width:100%}
.btn-sm{padding:10px 18px;font-size:14px}

/* ---------- Layout ---------- */
.main-wrap{
  margin-left:var(--sidebar-w);
  min-height:100vh;
  display:flex;flex-direction:column;
  transition:margin-left var(--t);
}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.topbar{display:none}
.scrim{display:none}

/* ---------- Article hero ---------- */
.article-head{padding:48px 0 0}
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:14px;color:var(--ink-3);margin-bottom:24px;
}
.crumbs a{color:var(--ink-3)}
.crumbs a:hover{color:var(--brand)}
.crumbs span.sep{color:var(--line)}
.crumbs .current{color:var(--brand);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:24px;padding:0 12px;border-radius:var(--r-pill);
  font-size:12px;letter-spacing:.12em;line-height:1;
  border:1px solid rgba(18,137,122,.45);color:var(--brand);background:rgba(18,137,122,.06);
}
.badge-solid{background:var(--accent);color:var(--ink);border-color:var(--accent);letter-spacing:.06em}
.article-title{
  font-size:clamp(30px,3.6vw,48px);
  line-height:1.18;letter-spacing:-.02em;font-weight:800;
  margin:18px 0 20px;max-width:20ch;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  font-family:var(--mono);font-size:13px;color:var(--ink-3);
  padding-bottom:28px;border-bottom:1px solid var(--line);
}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--line)}
.article-meta strong{color:var(--ink-2);font-weight:500}

/* ---------- Article body grid ---------- */
.article-layout{
  display:grid;grid-template-columns:minmax(0,760px) 240px;
  gap:48px;align-items:start;
  padding:48px 0 72px;
}
.article-body{font-size:17px;line-height:1.85;color:var(--ink-2);overflow-wrap:break-word}
.article-body > *:first-child{margin-top:0}
.article-body h2{
  position:relative;font-size:28px;font-weight:700;color:var(--ink);
  padding-left:16px;margin:44px 0 16px;line-height:1.3;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:4px;
  border-radius:2px;background:var(--accent);
}
.article-body h3{font-size:22px;color:var(--ink);margin:32px 0 12px}
.article-body h4{font-size:18px;color:var(--ink);margin:24px 0 10px}
.article-body p{margin:0 0 18px}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:22px}
.article-body ul li{list-style:disc}
.article-body ol li{list-style:decimal}
.article-body li{margin-bottom:8px}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;background:var(--tint);
  border-left:3px solid var(--brand);border-radius:0 var(--r-sm) var(--r-sm) 0;
  color:var(--ink);font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-md);margin:8px 0}
.article-body figure{margin:24px 0}
.article-body figcaption{font-size:13px;color:var(--ink-3);margin-top:8px;text-align:center;line-height:1.6}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;margin:24px 0}
.article-body thead th{
  text-align:left;border-top:2px solid var(--ink);border-bottom:1px solid var(--line);
  padding:10px 12px;color:var(--ink);font-weight:600;
}
.article-body tbody td{padding:10px 12px;border-bottom:1px solid var(--line)}
.article-body tbody tr:nth-child(even){background:var(--tint)}
.article-body code{
  background:var(--tint);padding:2px 6px;border-radius:4px;
  font-family:var(--mono);font-size:.9em;color:var(--brand-deep);
}
.article-body pre{
  background:var(--dark);color:#E8EDEA;padding:16px 18px;
  border-radius:var(--r-md);overflow:auto;margin:24px 0;
}
.article-body pre code{background:none;color:inherit;padding:0}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}

/* ---------- Aside ---------- */
.article-aside{position:sticky;top:32px;display:flex;flex-direction:column;gap:16px}
.aside-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  padding:20px;box-shadow:var(--e1);
}
.aside-card h3{font-size:14px;letter-spacing:.12em;color:var(--ink-3);font-weight:600;margin-bottom:14px}
.aside-info{display:flex;flex-direction:column;gap:10px;font-size:14px;color:var(--ink-2)}
.aside-info div{display:flex;justify-content:space-between;gap:12px}
.aside-info span:first-child{color:var(--ink-3)}
.aside-links{display:flex;flex-direction:column;gap:2px}
.aside-links a{
  display:flex;justify-content:space-between;align-items:center;gap:10px;
  padding:9px 0;font-size:14px;color:var(--ink-2);
  border-bottom:1px solid var(--line);
  transition:color var(--t),padding var(--t);
}
.aside-links a:last-child{border-bottom:0}
.aside-links a:hover{color:var(--brand);padding-left:4px}
.aside-links a span{font-family:var(--mono);font-size:12px;color:var(--ink-3)}

/* ---------- Empty state ---------- */
.article-empty{
  background:var(--card);border:1px dashed var(--line);border-radius:var(--r-lg);
  padding:48px 32px;text-align:center;box-shadow:var(--e1);
}
.article-empty h2{font-size:26px;margin-bottom:12px}
.article-empty p{color:var(--ink-2);max-width:44ch;margin:0 auto 24px}

/* ---------- Section common ---------- */
.section{padding:64px 0}
.section-head{max-width:720px;margin-bottom:32px}
.section-head .eyebrow{
  display:inline-block;font-family:var(--mono);font-size:12px;letter-spacing:.16em;
  color:var(--brand);margin-bottom:12px;
}
.section-head h2{font-size:clamp(26px,3vw,36px);line-height:1.2;letter-spacing:-.01em;margin-bottom:12px}
.section-head p{color:var(--ink-2);font-size:16px;margin:0}
.section-tint{background:var(--tint)}

/* ---------- Related cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;box-shadow:var(--e1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
  display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--e2);border-color:var(--brand)}
.card-media{position:relative;aspect-ratio:4/3;overflow:hidden;background:var(--tint)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform 400ms cubic-bezier(.2,.7,.3,1)}
.card:hover .card-media img{transform:scale(1.04)}
.card-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.card-tag{font-size:12px;letter-spacing:.12em;color:var(--brand);font-family:var(--mono)}
.card-body h3{font-size:19px;line-height:1.4}
.card-body p{font-size:14px;line-height:1.75;color:var(--ink-2);margin:0}
.card-foot{
  margin-top:auto;padding-top:12px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:12px;
  font-family:var(--mono);font-size:12px;color:var(--ink-3);
}
.card-foot .go{color:var(--brand)}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);max-width:860px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 0;font-size:18px;font-weight:600;color:var(--ink);
  transition:color var(--t);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand)}
.faq-item summary .sign{
  flex:0 0 auto;width:22px;height:22px;border-radius:50%;
  border:1px solid var(--line);color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:14px;line-height:1;
  transition:transform var(--t),background var(--t),border-color var(--t);
}
.faq-item[open] summary .sign{background:var(--brand);color:#fff;border-color:var(--brand);transform:rotate(45deg)}
.faq-item .faq-answer{padding:0 0 20px 16px;color:var(--ink-2);font-size:15px;line-height:1.85;max-width:72ch}
.faq-item .faq-answer p:last-child{margin-bottom:0}

/* ---------- CTA band ---------- */
.cta-band{background:var(--dark);color:#fff;padding:64px 0}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px}
.cta-inner h2{color:#fff;font-size:clamp(24px,2.8vw,32px);margin-bottom:8px}
.cta-inner p{color:rgba(255,255,255,.66);margin:0;font-size:15px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.link-quiet{color:rgba(255,255,255,.72);font-size:14px;border-bottom:1px solid rgba(255,255,255,.3);padding-bottom:2px}
.link-quiet:hover{color:#fff;border-color:#fff}

/* ---------- Float CTA ---------- */
.float-cta{
  position:fixed;right:32px;bottom:32px;z-index:40;
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 24px;border-radius:var(--r-pill);
  background:var(--brand);color:#fff;font-size:14px;font-weight:600;
  box-shadow:var(--e2);
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity var(--t),transform var(--t),background var(--t);
}
.float-cta.show{opacity:1;transform:none;pointer-events:auto}
.float-cta:hover{background:var(--brand-deep);color:#fff}

/* ---------- Footer ---------- */
.footer{background:var(--dark);color:#fff;padding:64px 0 28px;margin-top:auto}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;
  padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.08);
}
.footer-brand .brand-line1{display:block;font-size:22px;font-weight:800;line-height:1.25}
.footer-brand .brand-line2{display:block;font-size:15px;font-weight:500;color:var(--brand);letter-spacing:.18em;margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.55);margin:0;max-width:34ch}
.footer h4{font-size:14px;color:#fff;letter-spacing:.08em;margin-bottom:16px;font-weight:600}
.footer ul{display:flex;flex-direction:column;gap:10px}
.footer ul a{font-size:14px;color:rgba(255,255,255,.6)}
.footer ul a:hover{color:var(--brand)}
.footer-contact p{font-size:14px;color:rgba(255,255,255,.6);margin:0 0 8px;line-height:1.8}
.footer-contact .mono{color:var(--accent);font-size:13px}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding-top:24px;font-size:13px;color:rgba(255,255,255,.42);
}
.footer-bottom .mono{letter-spacing:.08em}

/* ---------- Responsive ---------- */
@media (max-width:1199px){
  :root{--sidebar-w:88px}
  .sidebar{padding:24px 12px;align-items:center;gap:20px}
  .logo{padding:0;align-items:center}
  .logo .brand-line1,.logo .brand-line2{display:none}
  .logo::after{display:none}
  .logo-mark{display:flex}
  .nav-item{justify-content:center;padding:12px 0;width:100%}
  .nav-label{display:none}
  .nav-ico{font-size:12px;color:rgba(255,255,255,.6)}
  .sidebar-foot .foot-text{display:none}
  .sidebar-foot .btn{padding:12px;font-size:0;gap:0}
  .sidebar-foot .btn::after{content:"→";font-size:16px}
  .article-layout{grid-template-columns:minmax(0,1fr)}
  .article-aside{display:none}
}
@media (max-width:991px){
  :root{--sidebar-w:0px}
  .sidebar{
    width:288px;padding:24px 20px;align-items:stretch;
    transform:translateX(-100%);box-shadow:var(--e2);
  }
  .sidebar.open{transform:none}
  .logo{align-items:flex-start}
  .logo .brand-line1,.logo .brand-line2{display:block}
  .logo::after{display:block}
  .logo-mark{display:none}
  .nav-item{justify-content:flex-start;padding:11px 12px}
  .nav-label{display:block}
  .sidebar-foot .foot-text{display:block}
  .sidebar-foot .btn{padding:14px 20px;font-size:15px}
  .sidebar-foot .btn::after{content:""}
  .main-wrap{margin-left:0;padding-top:64px}
  .topbar{
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    position:fixed;top:0;left:0;right:0;height:64px;padding:0 20px;
    background:var(--dark);z-index:45;border-bottom:1px solid rgba(255,255,255,.08);
  }
  .topbar .tb-brand{display:flex;flex-direction:column;line-height:1.15}
  .topbar .tb-brand b{font-size:16px;color:#fff;font-weight:800}
  .topbar .tb-brand i{font-style:normal;font-size:11px;color:var(--brand);letter-spacing:.18em}
  .nav-toggle{
    display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
    width:44px;height:44px;border:1px solid rgba(255,255,255,.18);border-radius:var(--r-sm);
    background:transparent;cursor:pointer;padding:0 11px;
  }
  .nav-toggle span{display:block;height:2px;background:#fff;border-radius:2px}
  .scrim{
    display:block;position:fixed;inset:0;background:rgba(15,20,23,.5);
    opacity:0;pointer-events:none;transition:opacity var(--t);z-index:49;
  }
  .scrim.show{opacity:1;pointer-events:auto}
  .container{padding:0 24px}
  .article-head{padding-top:32px}
  .article-layout{padding:32px 0 56px}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  body{font-size:16px}
  .topbar{height:56px;padding:0 16px}
  .main-wrap{padding-top:56px}
  .container{padding:0 18px}
  .article-title{font-size:30px;line-height:1.24;max-width:none}
  .article-meta{font-size:12px;gap:8px 14px;padding-bottom:22px}
  .article-body{font-size:16px;line-height:1.78}
  .article-body h2{font-size:23px;margin:32px 0 12px}
  .article-body h3{font-size:19px}
  .section{padding:48px 0}
  .card-grid{grid-template-columns:minmax(0,1fr);gap:18px}
  .faq-item summary{font-size:16px;padding:16px 0}
  .cta-band{padding:48px 0}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .float-cta{
    right:0;left:0;bottom:0;border-radius:0;
    justify-content:center;padding:18px 20px;font-size:15px;
    transform:translateY(100%);
  }
  .float-cta.show{transform:none}
  .footer{padding:48px 0 24px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
}

/* roulang page: category1 */
:root{
  --bg:#F6F4EF;
  --surface:#FFFFFF;
  --surface-alt:#EFEDE6;
  --primary:#12897A;
  --primary-deep:#10564A;
  --primary-darkest:#0B2B26;
  --accent:#E9A13C;
  --ink:#14181B;
  --ink-2:#4B555D;
  --ink-3:#8A939B;
  --line:#E2DFD8;
  --dark:#0F1417;
  --ok:#1F8A5B;
  --warn:#C4552E;
  --r-s:8px;
  --r-m:12px;
  --r-l:16px;
  --r-pill:999px;
  --e1:0 1px 2px rgba(15,20,23,.05);
  --e2:0 10px 30px -12px rgba(15,20,23,.18);
  --ease:240ms cubic-bezier(.2,.7,.3,1);
  --side:260px;
  --gutter:24px;
  --font:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --mono:ui-monospace,"JetBrains Mono",SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  padding:0;
  font-family:var(--font);
  font-size:17px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--primary);text-decoration:none;}
a:hover,a:focus{color:var(--primary-deep);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,h5,h6{margin:0;font-family:var(--font);color:var(--ink);font-weight:700;line-height:1.25;}
p{margin:0;}
button{font-family:inherit;font-size:inherit;cursor:pointer;}
input,textarea,select{font-family:inherit;font-size:15px;color:var(--ink);}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}
.mono{font-family:var(--mono);letter-spacing:.02em;}
.container{max-width:1160px;margin:0 auto;padding:0 var(--gutter);}
.section{padding:96px 0;scroll-margin-top:32px;}
.section.alt{background:var(--surface-alt);}
.section.tight{padding:72px 0;}

/* ---------- 左侧 App Shell ---------- */
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--side);
  background:var(--dark);
  color:#fff;
  display:flex;
  flex-direction:column;
  padding:28px 20px 22px;
  z-index:90;
  border-right:1px solid rgba(255,255,255,.06);
}
.brand{
  display:flex;align-items:center;gap:12px;
  color:#fff;text-decoration:none;margin-bottom:32px;
}
.brand:hover{color:#fff;}
.brand-mark{
  display:none;
  width:44px;height:44px;border-radius:var(--r-s);
  background:var(--primary);color:#fff;
  font-size:20px;font-weight:800;
  align-items:center;justify-content:center;
  flex:0 0 auto;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-line1{font-size:20px;font-weight:800;letter-spacing:.02em;color:#fff;}
.brand-line2{font-size:13px;font-weight:500;letter-spacing:.2em;color:rgba(255,255,255,.6);padding-top:4px;border-top:1px solid var(--primary);margin-top:4px;}
.nav-list{display:flex;flex-direction:column;gap:4px;flex:1 1 auto;overflow-y:auto;padding-bottom:12px;}
.nav-item{
  position:relative;
  display:flex;align-items:center;gap:12px;
  min-height:44px;
  padding:11px 12px 11px 16px;
  border-radius:var(--r-s);
  color:rgba(255,255,255,.72);
  font-size:14px;
  text-decoration:none;
  transition:background var(--ease),color var(--ease);
}
.nav-item::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;
  border-radius:2px;background:transparent;transition:background var(--ease);
}
.nav-item:hover{background:rgba(255,255,255,.05);color:#fff;}
.nav-item.active{background:rgba(255,255,255,.06);color:var(--primary);}
.nav-item.active::before{background:var(--primary);}
.nav-ico{font-family:var(--mono);font-size:12px;color:rgba(255,255,255,.32);letter-spacing:.08em;flex:0 0 auto;}
.nav-item.active .nav-ico{color:var(--accent);}
.sidebar-foot{margin-top:auto;padding-top:16px;border-top:1px solid rgba(255,255,255,.08);}
.sidebar-cta{
  display:flex;align-items:center;justify-content:center;gap:8px;
  width:100%;min-height:44px;padding:12px 18px;
  border-radius:var(--r-pill);
  background:var(--primary);color:#fff;
  font-size:14px;font-weight:600;
  transition:background var(--ease);
}
.sidebar-cta:hover{background:var(--primary-deep);color:#fff;}
.sidebar-note{
  margin-top:14px;font-size:12px;line-height:1.7;color:rgba(255,255,255,.45);
}
.overlay{
  display:none;position:fixed;inset:0;background:rgba(11,43,38,.55);
  z-index:88;opacity:0;transition:opacity var(--ease);
}
.overlay.show{display:block;opacity:1;}

/* ---------- 移动顶栏 ---------- */
.mobile-bar{
  display:none;position:fixed;top:0;left:0;right:0;height:64px;
  background:var(--dark);color:#fff;z-index:92;
  align-items:center;justify-content:space-between;
  padding:0 16px;border-bottom:1px solid rgba(255,255,255,.08);
}
.mobile-brand{display:flex;flex-direction:column;line-height:1.1;color:#fff;text-decoration:none;}
.mobile-brand b{font-size:16px;font-weight:800;letter-spacing:.02em;}
.mobile-brand span{font-size:11px;letter-spacing:.18em;color:rgba(255,255,255,.6);}
.menu-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:var(--r-s);
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);
  color:#fff;font-size:16px;
}

/* ---------- 主区域 ---------- */
.main{margin-left:var(--side);min-height:100vh;}

/* ---------- 页面头部 ---------- */
.page-head{
  position:relative;
  padding:88px 0 72px;
  color:#fff;
  background-image:
    linear-gradient(104deg,rgba(11,43,38,.95) 0%,rgba(11,43,38,.86) 52%,rgba(15,20,23,.72) 100%),
    url("/assets/images/backpic/back-1.png");
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.page-head::after{
  content:"";position:absolute;right:-120px;bottom:-120px;width:360px;height:360px;
  border-radius:50%;border:1px solid rgba(233,161,60,.28);pointer-events:none;
}
.page-head .container{position:relative;z-index:2;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,.62);margin-bottom:22px;}
.breadcrumb a{color:rgba(255,255,255,.72);}
.breadcrumb a:hover{color:var(--accent);}
.breadcrumb span{color:rgba(255,255,255,.32);}
.breadcrumb em{font-style:normal;color:var(--primary);}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:24px;padding:0 12px;border-radius:var(--r-pill);
  border:1px solid var(--primary);color:var(--primary);
  font-size:12px;letter-spacing:.12em;line-height:1;
  background:transparent;
}
.badge-solid{background:var(--accent);border-color:var(--accent);color:var(--ink);font-weight:700;}
.badge-on-dark{border-color:rgba(233,161,60,.55);color:var(--accent);}
.badge-ok{border-color:var(--ok);color:var(--ok);}
.badge-warn{border-color:var(--warn);color:var(--warn);}
.page-head h1{
  font-size:clamp(34px,4.4vw,58px);
  line-height:1.08;
  letter-spacing:-.02em;
  font-weight:800;
  color:#fff;
  margin:20px 0 0;
  max-width:16em;
}
.page-head h1 .accent-line{display:block;color:var(--primary);}
.lead{
  margin-top:20px;max-width:640px;
  font-size:17px;line-height:1.85;color:rgba(255,255,255,.78);
}
.head-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.metrics{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:0;margin-top:48px;border-top:1px solid rgba(255,255,255,.14);
}
.metrics li{padding:20px 20px 0 0;border-right:1px solid rgba(255,255,255,.1);}
.metrics li:last-child{border-right:0;}
.m-num{display:block;font-family:var(--mono);font-size:26px;font-weight:700;color:var(--accent);line-height:1.2;}
.m-label{display:block;font-size:13px;color:rgba(255,255,255,.62);margin-top:4px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:14px 28px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  text-decoration:none;cursor:pointer;
  transition:background var(--ease),color var(--ease),border-color var(--ease),box-shadow var(--ease),transform var(--ease);
}
.btn .arrow{transition:transform var(--ease);}
.btn:hover .arrow{transform:translateX(4px);}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover,.btn-primary:focus{background:var(--primary-deep);color:#fff;box-shadow:var(--e2);}
.btn-ghost{background:transparent;color:var(--ink);border-color:rgba(20,24,27,.22);}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary-deep);}
.btn-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.4);}
.btn-light:hover{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.7);}
.btn-block{width:100%;}
.btn-sm{min-height:38px;padding:10px 18px;font-size:14px;}

/* ---------- 栅格 ---------- */
.grid-x{margin:0 calc(var(--gutter) / -2);}
.grid-x>.cell{padding:0 calc(var(--gutter) / 2);}
@media (min-width:992px){
  .grid-x>.cell.split-7{width:58.3333%;}
  .grid-x>.cell.split-5{width:41.6667%;}
  .grid-x>.cell.split-6{width:50%;}
  .grid-x>.cell.split-8{width:66.6666%;}
  .grid-x>.cell.split-4{width:33.3333%;}
}

/* ---------- 区块标题 ---------- */
.sec-head{max-width:720px;margin-bottom:48px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:12px;letter-spacing:.16em;
  color:var(--primary);text-transform:uppercase;margin-bottom:16px;
}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--accent);border-radius:2px;}
.sec-head h2{font-size:clamp(26px,3vw,38px);line-height:1.2;letter-spacing:-.01em;}
.sec-head p{margin-top:16px;color:var(--ink-2);font-size:16px;line-height:1.85;}
.section.dark .sec-head h2,.section.dark h2,.section.dark h3{color:#fff;}
.section.dark .sec-head p{color:rgba(255,255,255,.66);}

/* ---------- 分栏内容 ---------- */
.channel-figure{
  border-radius:var(--r-l);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--e1);background:var(--surface);
}
.channel-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.channel-figure figcaption{
  padding:14px 18px;font-size:13px;color:var(--ink-3);border-top:1px solid var(--line);
  background:var(--surface);
}
.note-list{margin-top:32px;display:flex;flex-direction:column;gap:26px;}
.note-item{display:flex;gap:18px;}
.note-idx{
  flex:0 0 auto;font-family:var(--mono);font-size:14px;font-weight:700;
  color:var(--accent);padding-top:3px;letter-spacing:.06em;
}
.note-item h3{font-size:20px;margin-bottom:8px;letter-spacing:-.01em;}
.note-item p{font-size:16px;line-height:1.85;color:var(--ink-2);}

/* ---------- 侧边信息卡 ---------- */
.info-card{
  position:sticky;top:32px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-m);
  padding:28px 24px;box-shadow:var(--e1);
}
.info-kicker{font-size:11px;letter-spacing:.18em;color:var(--ink-3);margin-bottom:12px;}
.info-card h3{font-size:20px;line-height:1.4;margin-bottom:20px;}
.info-list{display:flex;flex-direction:column;gap:16px;margin-bottom:24px;}
.info-list li{display:flex;gap:12px;align-items:flex-start;}
.info-list i{color:var(--primary);font-size:15px;margin-top:5px;flex:0 0 auto;}
.info-list strong{display:block;font-size:15px;font-weight:700;color:var(--ink);}
.info-list span{display:block;font-size:13px;line-height:1.7;color:var(--ink-3);margin-top:2px;}
.info-note{font-size:12px;line-height:1.7;color:var(--ink-3);margin-top:14px;text-align:center;}

/* ---------- 行式列表 ---------- */
.row-list{border-top:1px solid var(--line);}
.row-list li{
  display:flex;align-items:center;gap:24px;
  padding:26px 20px;border-bottom:1px solid var(--line);
  transition:background var(--ease);
}
.row-list li:hover{background:var(--bg);}
.rl-idx{font-family:var(--mono);font-size:13px;color:var(--accent);flex:0 0 40px;letter-spacing:.08em;}
.rl-main{flex:1 1 auto;min-width:0;}
.rl-main h3{font-size:18px;margin-bottom:6px;}
.rl-main p{font-size:14px;line-height:1.75;color:var(--ink-2);}
.rl-side{flex:0 0 auto;display:flex;flex-direction:column;align-items:flex-end;gap:8px;}
.rl-meta{font-family:var(--mono);font-size:12px;color:var(--ink-3);}

/* ---------- 步骤流 ---------- */
.steps{position:relative;padding-left:0;}
.steps li{display:flex;gap:28px;padding:0 0 40px;position:relative;}
.steps li:last-child{padding-bottom:0;}
.steps li::before{
  content:"";position:absolute;left:29px;top:56px;bottom:6px;width:1px;background:var(--line);
}
.steps li:last-child::before{display:none;}
.step-num{
  flex:0 0 60px;height:60px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--surface);border:1px solid var(--line);
  font-family:var(--mono);font-size:16px;font-weight:700;color:var(--primary);
  z-index:1;transition:border-color var(--ease),background var(--ease),color var(--ease);
}
.steps li:hover .step-num{background:var(--primary);border-color:var(--primary);color:#fff;}
.step-body h3{font-size:21px;margin-bottom:8px;}
.step-body p{font-size:16px;line-height:1.85;color:var(--ink-2);max-width:640px;}

/* ---------- 准备清单 ---------- */
.prep{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);
  padding:32px;box-shadow:var(--e1);
}
.prep h3{font-size:20px;margin-bottom:20px;}
.prep ol{counter-reset:prep;display:flex;flex-direction:column;gap:18px;}
.prep ol li{
  display:flex;gap:14px;font-size:15px;line-height:1.8;color:var(--ink-2);
  padding-bottom:18px;border-bottom:1px dashed var(--line);
}
.prep ol li:last-child{border-bottom:0;padding-bottom:0;}
.prep ol li::before{
  counter-increment:prep;content:"0" counter(prep);
  font-family:var(--mono);font-size:13px;color:var(--primary);
  flex:0 0 auto;padding-top:3px;
}
.stat-strip{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:1px;background:var(--line);border:1px solid var(--line);
  border-radius:var(--r-m);overflow:hidden;margin-top:32px;
}
.stat-strip div{background:var(--surface);padding:22px 20px;}
.stat-strip b{display:block;font-family:var(--mono);font-size:22px;color:var(--primary-deep);line-height:1.3;}
.stat-strip span{display:block;font-size:13px;color:var(--ink-3);margin-top:4px;}

/* ---------- FAQ ---------- */
.faq{max-width:820px;border-top:1px solid var(--line);}
.faq details{border-bottom:1px solid var(--line);}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;cursor:pointer;list-style:none;
  font-size:18px;font-weight:600;color:var(--ink);
  transition:color var(--ease),background var(--ease);
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary:hover{color:var(--primary-deep);}
.faq summary .sign{
  flex:0 0 auto;width:24px;height:24px;position:relative;
}
.faq summary .sign::before,
.faq summary .sign::after{
  content:"";position:absolute;background:var(--primary);border-radius:2px;
  transition:transform var(--ease),opacity var(--ease);
}
.faq summary .sign::before{left:0;top:11px;width:24px;height:2px;}
.faq summary .sign::after{left:11px;top:0;width:2px;height:24px;}
.faq details[open] summary .sign::after{transform:rotate(90deg);opacity:0;}
.faq details[open] summary{color:var(--primary-deep);}
.faq .faq-body{
  padding:0 4px 24px 20px;font-size:16px;line-height:1.9;color:var(--ink-2);
}

/* ---------- CTA 带 ---------- */
.cta-band{
  background:var(--dark);color:#fff;padding:72px 0;position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;left:-80px;top:-80px;width:280px;height:280px;
  border-radius:50%;border:1px solid rgba(18,137,122,.35);pointer-events:none;
}
.cta-band .container{position:relative;z-index:2;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:32px;}
.cta-band h2{font-size:clamp(24px,2.8vw,34px);color:#fff;line-height:1.25;letter-spacing:-.01em;}
.cta-band p{margin-top:12px;color:rgba(255,255,255,.66);font-size:15px;max-width:520px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;}

/* ---------- 页脚 ---------- */
.footer{
  background:var(--dark);color:#fff;padding:72px 0 0;margin-left:var(--side);
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;
  padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,.1);
}
.footer-brand .brand-line1{display:block;font-size:20px;font-weight:800;color:#fff;}
.footer-brand .brand-line2{display:block;font-size:13px;letter-spacing:.2em;color:rgba(255,255,255,.6);margin-top:6px;border-top:1px solid var(--primary);padding-top:8px;width:fit-content;}
.footer-brand p{margin-top:18px;font-size:14px;line-height:1.9;color:rgba(255,255,255,.55);max-width:320px;}
.footer h4{font-size:14px;letter-spacing:.08em;color:#fff;margin-bottom:18px;font-weight:700;}
.footer ul{display:flex;flex-direction:column;gap:12px;}
.footer ul a{font-size:14px;color:rgba(255,255,255,.62);transition:color var(--ease);}
.footer ul a:hover{color:var(--primary);}
.footer-contact p{font-size:14px;line-height:1.9;color:rgba(255,255,255,.62);}
.footer-contact .mono{color:var(--accent);font-size:13px;margin-top:8px;}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding:24px 0;font-size:13px;color:rgba(255,255,255,.45);
}
.footer-bottom .mono{color:rgba(255,255,255,.35);font-size:12px;}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:32px;bottom:32px;z-index:70;
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 24px;border-radius:var(--r-pill);
  background:var(--primary);color:#fff;font-size:14px;font-weight:600;
  box-shadow:var(--e2);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity var(--ease),transform var(--ease),visibility var(--ease),background var(--ease);
}
.float-cta.show{opacity:1;visibility:visible;transform:none;}
.float-cta:hover{background:var(--primary-deep);color:#fff;}
.float-cta .arrow{transition:transform var(--ease);}
.float-cta:hover .arrow{transform:translateX(4px);}
.mobile-cta{display:none;}

/* ---------- 响应式 ---------- */
@media (min-width:992px) and (max-width:1199px){
  :root{--side:88px;}
  .sidebar{padding:24px 12px 18px;align-items:center;}
  .brand{justify-content:center;margin-bottom:24px;}
  .brand-text{display:none;}
  .brand-mark{display:flex;}
  .nav-label{display:none;}
  .nav-item{justify-content:center;padding:11px 0;width:48px;gap:0;}
  .nav-item::before{left:-4px;}
  .sidebar-foot{width:100%;display:flex;flex-direction:column;align-items:center;border-top:1px solid rgba(255,255,255,.1);}
  .sidebar-cta{padding:0;width:48px;min-height:48px;border-radius:var(--r-m);}
  .sidebar-cta .cta-text{display:none;}
  .sidebar-note{display:none;}
  .main{margin-left:var(--side);}
  .footer{margin-left:var(--side);}
}
@media (max-width:991px){
  .sidebar{
    transform:translateX(-100%);
    transition:transform var(--ease);
    width:280px;
    padding:24px 20px;
    align-items:stretch;
    box-shadow:var(--e2);
  }
  .sidebar.open{transform:none;}
  .brand-text{display:flex;}
  .brand-mark{display:none;}
  .nav-label{display:inline;}
  .nav-item{justify-content:flex-start;padding:11px 12px 11px 16px;width:auto;}
  .nav-item::before{left:0;}
  .mobile-bar{display:flex;}
  .main{margin-left:0;padding-top:64px;}
  .footer{margin-left:0;}
  .page-head{padding:56px 0 52px;}
  .section{padding:64px 0;}
  .metrics{grid-template-columns:repeat(2,minmax(0,1fr));margin-top:36px;}
  .metrics li{padding:16px 16px 0 0;}
  .metrics li:nth-child(2n){border-right:0;}
  .info-card{position:static;margin-top:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-band .container{flex-direction:column;align-items:flex-start;}
}
@media (max-width:767px){
  :root{--gutter:18px;}
  body{font-size:16px;}
  .mobile-bar{height:56px;}
  .main{padding-top:56px;padding-bottom:60px;}
  .page-head{padding:44px 0 40px;}
  .page-head h1{font-size:clamp(28px,7vw,36px);line-height:1.15;}
  .lead{font-size:16px;margin-top:16px;}
  .head-actions .btn{width:100%;}
  .metrics{grid-template-columns:1fr;border-top:1px solid rgba(255,255,255,.14);}
  .metrics li{border-right:0;border-bottom:1px solid rgba(255,255,255,.1);padding:14px 0 12px;}
  .metrics li:last-child{border-bottom:0;}
  .m-num{font-size:22px;}
  .row-list li{flex-wrap:wrap;gap:12px;padding:20px 4px;}
  .rl-idx{flex:0 0 100%;}
  .rl-side{align-items:flex-start;flex-direction:row;gap:12px;}
  .steps li{gap:16px;padding-bottom:32px;}
  .step-num{flex:0 0 48px;height:48px;font-size:14px;}
  .steps li::before{left:23px;top:48px;}
  .prep{padding:24px 20px;}
  .stat-strip{grid-template-columns:1fr;}
  .faq summary{font-size:16px;padding:18px 2px;}
  .faq .faq-body{padding-left:2px;font-size:15px;}
  .footer{padding:56px 0 0;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .float-cta{display:none;}
  .mobile-cta{
    display:flex;position:fixed;left:0;right:0;bottom:0;height:60px;z-index:85;
    align-items:center;justify-content:space-between;gap:12px;
    padding:0 16px;background:var(--dark);border-top:1px solid rgba(255,255,255,.1);
  }
  .mobile-cta span{font-size:13px;color:rgba(255,255,255,.72);line-height:1.3;}
  .mobile-cta .btn{min-height:40px;padding:10px 20px;font-size:14px;}
  .cta-band{padding:52px 0;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
}
@media (max-width:520px){
  .sec-head h2{font-size:24px;}
  .note-item{flex-direction:column;gap:6px;}
  .note-item h3{font-size:18px;}
  .step-body h3{font-size:18px;}
  .stat-strip div{padding:18px 16px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category2 */
:root{
  --bg:#F6F4EF;
  --surface:#FFFFFF;
  --bg-soft:#EFEDE6;
  --brand:#12897A;
  --brand-deep:#10564A;
  --brand-deepest:#0B2B26;
  --accent:#E9A13C;
  --ink:#14181B;
  --ink-2:#4B555D;
  --ink-3:#8A939B;
  --line:#E2DFD8;
  --dark:#0F1417;
  --ok:#1F8A5B;
  --warn:#C4552E;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-pill:999px;
  --elev-1:0 1px 2px rgba(15,20,23,.05);
  --elev-2:0 10px 30px -12px rgba(15,20,23,.18);
  --ease:240ms cubic-bezier(.2,.7,.3,1);
  --mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--sans);
  font-size:17px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand-deep);text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--brand)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.15;font-weight:700;letter-spacing:-.01em}
p{margin:0 0 16px}
p:last-child{margin-bottom:0}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%}
.mono{font-family:var(--mono);letter-spacing:.02em}

/* ---------- App shell ---------- */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:260px;
  background:var(--dark);color:#fff;z-index:80;
  display:flex;flex-direction:column;
  padding:26px 18px 22px;
  border-right:1px solid rgba(255,255,255,.06);
  transition:transform var(--ease),width var(--ease);
}
.brand{display:block;padding:4px 10px 22px;color:#fff}
.brand:hover{color:#fff}
.brand-line1{display:block;font-size:22px;font-weight:800;letter-spacing:.02em;line-height:1.2}
.brand-line2{display:block;font-size:16px;font-weight:500;color:rgba(255,255,255,.72);line-height:1.3;position:relative;padding-bottom:10px}
.brand-line2::after{content:"";position:absolute;left:0;bottom:0;width:34px;height:2px;background:var(--brand);border-radius:2px}
.brand-seal{display:none;width:44px;height:44px;border-radius:var(--r-sm);background:rgba(18,137,122,.16);color:#fff;font-size:20px;font-weight:800;align-items:center;justify-content:center;border:1px solid rgba(18,137,122,.5)}

.nav-list{display:flex;flex-direction:column;gap:2px;flex:1;overflow-y:auto;padding-top:6px}
.nav-item{
  display:flex;align-items:center;gap:12px;
  padding:12px 12px;border-radius:0 var(--r-sm) var(--r-sm) 0;
  border-left:3px solid transparent;
  color:rgba(255,255,255,.7);font-size:14px;line-height:1.45;
  transition:all var(--ease);min-height:44px;
}
.nav-item:hover{color:#fff;background:rgba(255,255,255,.04)}
.nav-item.active{color:var(--brand);background:rgba(255,255,255,.04);border-left-color:var(--brand);font-weight:600}
.nav-ico{font-family:var(--mono);font-size:11px;color:rgba(255,255,255,.34);letter-spacing:.08em;flex:none}
.nav-item.active .nav-ico{color:var(--brand)}
.nav-label{display:block}
.side-foot{margin-top:18px;padding-top:18px;border-top:1px solid rgba(255,255,255,.08)}
.side-cta{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  background:var(--brand);color:#fff;border-radius:var(--r-pill);
  padding:12px 18px;font-size:14px;font-weight:600;min-height:44px;
  transition:background var(--ease),transform var(--ease);
}
.side-cta:hover{background:var(--brand-deep);color:#fff}
.side-cta span.arrow{transition:transform var(--ease)}
.side-cta:hover span.arrow{transform:translateX(4px)}
.side-note{margin-top:14px;font-size:12px;color:rgba(255,255,255,.44);line-height:1.7;font-family:var(--mono)}

/* ---------- Topbar / drawer (mobile) ---------- */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:64px;z-index:90;
  background:var(--dark);align-items:center;justify-content:space-between;
  padding:0 18px;border-bottom:1px solid rgba(255,255,255,.08);
}
.topbar .brand{padding:0}
.topbar .brand-line1{font-size:17px}
.topbar .brand-line2{font-size:13px;padding-bottom:0}
.topbar .brand-line2::after{display:none}
.burger{
  width:44px;height:44px;border-radius:var(--r-sm);border:1px solid rgba(255,255,255,.18);
  background:transparent;display:flex;align-items:center;justify-content:center;
  flex-direction:column;gap:5px;cursor:pointer;
}
.burger i{display:block;width:18px;height:2px;background:#fff;border-radius:2px;transition:transform var(--ease),opacity var(--ease)}
.burger[aria-expanded="true"] i:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded="true"] i:nth-child(2){opacity:0}
.burger[aria-expanded="true"] i:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.drawer-mask{
  display:none;position:fixed;inset:0;background:rgba(15,20,23,.55);z-index:75;
  opacity:0;transition:opacity var(--ease);
}
.drawer-mask.show{display:block;opacity:1}

/* ---------- Main ---------- */
.main{margin-left:260px;min-height:100vh;display:flex;flex-direction:column}
.section{padding:96px 0}
.section-soft{background:var(--bg-soft)}
.section-dark{background:var(--dark);color:#fff}
.section-head{max-width:760px;margin-bottom:48px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);
  font-size:12px;letter-spacing:.14em;color:var(--brand);text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--accent);border-radius:2px}
.section-head h2{font-size:38px;margin-bottom:14px}
.section-head p{color:var(--ink-2);font-size:17px}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 28px;border-radius:var(--r-pill);font-size:16px;font-weight:600;
  border:1px solid transparent;cursor:pointer;min-height:48px;
  transition:all var(--ease);
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--elev-1)}
.btn-primary:hover{background:var(--brand-deep);color:#fff;box-shadow:var(--elev-2)}
.btn-primary .arrow{transition:transform var(--ease)}
.btn-primary:hover .arrow{transform:translateX(4px)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff}
.btn-light{background:#fff;color:var(--brand-deepest)}
.btn-light:hover{background:var(--bg-soft);color:var(--brand-deepest)}
.btn-sm{padding:10px 20px;font-size:14px;min-height:40px}
.link-underline{position:relative;display:inline-block;color:var(--brand-deep);font-weight:600}
.link-underline::after{
  content:"";position:absolute;left:0;bottom:-3px;width:100%;height:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform var(--ease);
}
.link-underline:hover::after{transform:scaleX(1)}

/* ---------- Badges ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 12px;
  border-radius:var(--r-pill);font-size:12px;letter-spacing:.06em;
  border:1px solid rgba(18,137,122,.45);color:var(--brand-deep);
  background:rgba(18,137,122,.07);font-weight:600;
}
.badge-solid{background:var(--accent);color:var(--ink);border-color:var(--accent)}
.badge-dark{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.24)}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;overflow:hidden;color:#fff;
  background-image:linear-gradient(105deg,rgba(11,43,38,.96) 0%,rgba(11,43,38,.88) 46%,rgba(15,20,23,.72) 100%),url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
  padding:88px 0 72px;
}
.page-hero::after{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;
  border:1px solid rgba(255,255,255,.1);border-radius:50%;pointer-events:none;
}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:14px;color:rgba(255,255,255,.6);margin-bottom:28px;
}
.breadcrumb a{color:rgba(255,255,255,.66)}
.breadcrumb a:hover{color:#fff}
.breadcrumb .sep{color:rgba(255,255,255,.3)}
.breadcrumb .current{color:var(--accent)}
.page-hero h1{font-size:56px;line-height:1.08;letter-spacing:-.02em;font-weight:800;margin:18px 0 20px;max-width:860px}
.page-hero h1 em{font-style:normal;color:var(--accent)}
.hero-lead{font-size:18px;line-height:1.85;color:rgba(255,255,255,.78);max-width:680px;margin-bottom:32px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.hero-grid{margin-top:52px}
.hero-figure{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  aspect-ratio:4/3;box-shadow:0 24px 60px -30px rgba(0,0,0,.65);
  border:1px solid rgba(255,255,255,.12);
}
.hero-figure img{width:100%;height:100%;object-fit:cover}
.hero-figure figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:14px 18px;font-size:13px;
  background:linear-gradient(to top,rgba(11,43,38,.9),rgba(11,43,38,0));color:rgba(255,255,255,.82);
}
.hero-strip{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;margin-top:44px;
  background:rgba(255,255,255,.14);border-radius:var(--r-md);overflow:hidden;
}
.hero-strip div{background:rgba(15,20,23,.55);padding:18px 20px}
.hero-strip strong{display:block;font-family:var(--mono);font-size:24px;color:#fff;line-height:1.2}
.hero-strip span{font-size:13px;color:rgba(255,255,255,.6)}

/* ---------- Steps ---------- */
.steps{position:relative;padding-left:0}
.steps::before{
  content:"";position:absolute;left:35px;top:40px;bottom:52px;width:2px;
  background:linear-gradient(to bottom,rgba(18,137,122,.55),rgba(233,161,60,.45),rgba(226,223,216,0));
}
.step{
  position:relative;display:grid;grid-template-columns:72px 1fr;gap:32px;
  padding:28px 0 36px;
}
.step-num{
  position:relative;z-index:1;display:flex;align-items:center;justify-content:center;
  width:72px;height:72px;border-radius:var(--r-md);
  background:var(--surface);border:1px solid var(--line);
  font-family:var(--mono);font-size:24px;font-weight:700;color:var(--brand-deep);
  box-shadow:var(--elev-1);transition:all var(--ease);
}
.step:hover .step-num{border-color:var(--brand);color:var(--brand);box-shadow:var(--elev-2);transform:translateY(-2px)}
.step-body{padding-top:6px;max-width:720px}
.step-body h3{font-size:23px;margin-bottom:10px}
.step-body p{color:var(--ink-2);margin-bottom:12px}
.step-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:6px}
.chip{
  font-family:var(--mono);font-size:12px;letter-spacing:.04em;
  padding:4px 12px;border-radius:var(--r-pill);background:var(--bg-soft);
  color:var(--ink-2);border:1px solid var(--line);
}

/* ---------- Notice strip ---------- */
.notice-strip{
  display:flex;gap:20px;align-items:flex-start;
  background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--accent);
  border-radius:var(--r-md);padding:24px 28px;margin-top:24px;box-shadow:var(--elev-1);
}
.notice-strip .ico{
  flex:none;width:40px;height:40px;border-radius:var(--r-sm);
  background:rgba(233,161,60,.16);color:var(--warn);
  display:flex;align-items:center;justify-content:center;font-weight:800;font-family:var(--mono);
}
.notice-strip h4{font-size:17px;margin-bottom:6px}
.notice-strip p{font-size:15px;color:var(--ink-2);margin:0}

/* ---------- Requirement list ---------- */
.split-head{max-width:420px}
.split-head h2{font-size:36px;margin-bottom:16px}
.split-head p{color:var(--ink-2)}
.req-list{border-top:1px solid var(--line)}
.req-item{
  display:grid;grid-template-columns:44px 1fr auto;gap:20px;align-items:baseline;
  padding:20px 4px;border-bottom:1px solid var(--line);transition:background var(--ease);
}
.req-item:hover{background:var(--surface)}
.req-item .idx{font-family:var(--mono);font-size:13px;color:var(--accent);font-weight:700}
.req-item h4{font-size:17px;font-weight:600;margin-bottom:2px}
.req-item p{font-size:14px;color:var(--ink-3);margin:0;line-height:1.7}
.req-item .val{font-family:var(--mono);font-size:13px;color:var(--brand-deep);white-space:nowrap}
.req-visual{
  margin-top:32px;border-radius:var(--r-lg);overflow:hidden;
  aspect-ratio:16/9;border:1px solid var(--line);box-shadow:var(--elev-1);
}
.req-visual img{width:100%;height:100%;object-fit:cover}

/* ---------- Metric row ---------- */
.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--elev-1);
}
.metric{padding:32px 26px;border-right:1px solid var(--line)}
.metric:last-child{border-right:none}
.metric strong{display:block;font-family:var(--mono);font-size:34px;line-height:1.1;color:var(--brand-deep)}
.metric span{display:block;margin-top:8px;font-size:14px;color:var(--ink-2)}
.metric small{display:block;margin-top:4px;font-size:12px;color:var(--ink-3)}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);max-width:900px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;font-size:18px;font-weight:600;color:var(--ink);transition:color var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand-deep)}
.faq-item summary .mark{
  flex:none;width:26px;height:26px;border-radius:50%;border:1px solid var(--line);
  position:relative;transition:all var(--ease);
}
.faq-item summary .mark::before,
.faq-item summary .mark::after{
  content:"";position:absolute;top:50%;left:50%;background:var(--brand-deep);border-radius:2px;
  transform:translate(-50%,-50%);transition:transform var(--ease),opacity var(--ease);
}
.faq-item summary .mark::before{width:12px;height:2px}
.faq-item summary .mark::after{width:2px;height:12px}
.faq-item[open] summary .mark{background:rgba(18,137,122,.1);border-color:var(--brand)}
.faq-item[open] summary .mark::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq-body{padding:0 4px 24px 16px;color:var(--ink-2);font-size:16px;max-width:760px}
.faq-body p{margin-bottom:10px}

/* ---------- Contact card ---------- */
.contact-card{
  margin-top:40px;display:grid;grid-template-columns:1fr auto;gap:28px;align-items:center;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:32px 36px;box-shadow:var(--elev-1);
}
.contact-card h3{font-size:22px;margin-bottom:8px}
.contact-card p{font-size:15px;color:var(--ink-2);margin:0}

/* ---------- CTA band ---------- */
.cta-band{padding:80px 0}
.cta-inner{
  display:grid;grid-template-columns:1fr auto;gap:40px;align-items:center;
  background:linear-gradient(120deg,var(--brand-deepest),var(--dark) 62%,rgba(18,137,122,.35));
  border-radius:var(--r-lg);padding:56px 52px;color:#fff;position:relative;overflow:hidden;
  border:1px solid rgba(255,255,255,.08);
}
.cta-inner::before{
  content:"";position:absolute;right:-60px;bottom:-90px;width:320px;height:320px;
  border-radius:50%;border:1px solid rgba(255,255,255,.1);
}
.cta-inner h2{font-size:34px;margin-bottom:14px;position:relative}
.cta-inner p{color:rgba(255,255,255,.72);font-size:16px;max-width:620px;margin:0;position:relative}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;position:relative}
.cta-actions .link-underline{color:#fff}
.cta-actions .link-underline::after{background:var(--accent)}

/* ---------- Floating CTA / mobile bar ---------- */
.float-cta{
  position:fixed;right:32px;bottom:32px;z-index:70;
  display:inline-flex;align-items:center;gap:10px;
  background:var(--brand);color:#fff;border-radius:var(--r-pill);
  padding:14px 26px;font-size:15px;font-weight:600;box-shadow:var(--elev-2);
  opacity:0;transform:translateY(10px);pointer-events:none;
  transition:opacity var(--ease),transform var(--ease),background var(--ease);
}
.float-cta.show{opacity:1;transform:translateY(0);pointer-events:auto}
.float-cta:hover{background:var(--brand-deep);color:#fff}
.mobile-cta{
  display:none;position:fixed;left:0;right:0;bottom:0;height:60px;z-index:78;
  background:var(--dark);border-top:1px solid rgba(255,255,255,.1);
  align-items:center;justify-content:space-between;padding:0 16px;gap:12px;
}
.mobile-cta span{font-size:13px;color:rgba(255,255,255,.72)}
.mobile-cta a{
  background:var(--brand);color:#fff;border-radius:var(--r-pill);
  padding:10px 20px;font-size:14px;font-weight:600;white-space:nowrap;
}

/* ---------- Footer ---------- */
.footer{background:var(--dark);color:rgba(255,255,255,.72);padding:72px 0 26px;margin-top:auto}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px}
.footer-brand .brand-line1{font-size:20px;color:#fff}
.footer-brand .brand-line2{font-size:15px;color:rgba(255,255,255,.7)}
.footer-brand p{margin-top:18px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.5);max-width:320px}
.footer h4{font-size:14px;color:#fff;margin-bottom:18px;letter-spacing:.04em}
.footer ul li{margin-bottom:10px}
.footer ul a{font-size:14px;color:rgba(255,255,255,.6)}
.footer ul a:hover{color:var(--brand)}
.footer-contact p{font-size:14px;color:rgba(255,255,255,.6);margin-bottom:10px}
.footer-contact .mono{color:var(--accent);font-size:13px}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.44);
}
.footer-bottom .mono{color:rgba(255,255,255,.34)}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 520ms var(--ease),transform 520ms var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media screen and (max-width:1199px){
  .sidebar{width:88px;padding:22px 12px}
  .sidebar .brand{padding:0 0 20px;display:flex;justify-content:center}
  .sidebar .brand-line1,.sidebar .brand-line2{display:none}
  .sidebar .brand-seal{display:flex}
  .nav-item{justify-content:center;padding:12px 0;border-radius:var(--r-sm);border-left-width:0;border-right:3px solid transparent}
  .nav-item.active{border-right-color:var(--brand);border-left-color:transparent}
  .nav-label{display:none}
  .nav-ico{font-size:12px;color:rgba(255,255,255,.6)}
  .side-cta{justify-content:center;padding:12px 0;font-size:0}
  .side-cta .arrow{font-size:16px}
  .side-note{display:none}
  .main{margin-left:88px}
  .page-hero h1{font-size:48px}
}
@media screen and (max-width:991px){
  .topbar{display:flex}
  .sidebar{width:280px;transform:translateX(-100%);padding:24px 18px}
  .sidebar.open{transform:translateX(0)}
  .sidebar .brand{display:block;padding:4px 10px 22px}
  .sidebar .brand-line1{display:block;font-size:20px}
  .sidebar .brand-line2{display:block;font-size:15px;padding-bottom:10px}
  .sidebar .brand-line2::after{display:block}
  .sidebar .brand-seal{display:none}
  .nav-item{justify-content:flex-start;padding:12px 12px;border-radius:0 var(--r-sm) var(--r-sm) 0;border-left:3px solid transparent;border-right:none}
  .nav-item.active{border-left-color:var(--brand);border-right-color:transparent}
  .nav-label{display:block}
  .side-cta{justify-content:space-between;padding:12px 18px;font-size:14px}
  .side-cta .arrow{font-size:14px}
  .side-note{display:block}
  .main{margin-left:0;padding-top:64px}
  .page-hero{padding:64px 0 56px}
  .page-hero h1{font-size:40px}
  .section{padding:72px 0}
  .section-head h2{font-size:30px}
  .hero-strip{grid-template-columns:repeat(2,1fr)}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .metric:nth-child(2){border-right:none}
  .metric:nth-child(1),.metric:nth-child(2){border-bottom:1px solid var(--line)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-inner{grid-template-columns:1fr;padding:40px 32px}
  .contact-card{grid-template-columns:1fr;align-items:flex-start}
  .float-cta{display:none}
}
@media screen and (max-width:767px){
  body{font-size:16px;line-height:1.75;padding-bottom:60px}
  .topbar{height:56px}
  .main{padding-top:56px}
  .container{padding:0 18px}
  .page-hero{padding:44px 0 44px}
  .page-hero h1{font-size:34px;line-height:1.2}
  .hero-lead{font-size:16px}
  .section{padding:56px 0}
  .section-head h2,.split-head h2{font-size:26px}
  .steps::before{left:23px;top:30px;bottom:30px}
  .step{grid-template-columns:48px 1fr;gap:18px;padding:22px 0 28px}
  .step-num{width:48px;height:48px;font-size:16px;border-radius:var(--r-sm)}
  .step-body h3{font-size:19px}
  .hero-strip{grid-template-columns:1fr 1fr}
  .hero-strip strong{font-size:19px}
  .metrics{grid-template-columns:1fr}
  .metric{border-right:none;border-bottom:1px solid var(--line);padding:24px 20px}
  .metric:last-child{border-bottom:none}
  .req-item{grid-template-columns:32px 1fr;gap:14px}
  .req-item .val{grid-column:2;font-size:12px}
  .notice-strip{flex-direction:column;gap:14px;padding:20px}
  .faq-item summary{font-size:16px;padding:18px 2px}
  .faq-body{padding-left:0}
  .cta-inner{padding:32px 22px}
  .cta-inner h2{font-size:24px}
  .contact-card{padding:24px 20px}
  .footer{padding:56px 0 86px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .mobile-cta{display:flex}
  .btn{padding:13px 22px;font-size:15px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category3 */
:root{
  --paper:#F6F4EF;
  --card:#FFFFFF;
  --soft:#EFEDE6;
  --primary:#12897A;
  --primary-deep:#10564A;
  --primary-darkest:#0B2B26;
  --accent:#E9A13C;
  --ink:#14181B;
  --muted:#4B555D;
  --weak:#8A939B;
  --line:#E2DFD8;
  --dark:#0F1417;
  --success:#1F8A5B;
  --warn:#C4552E;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-pill:999px;
  --elev-1:0 1px 2px rgba(15,20,23,.05);
  --elev-2:0 10px 30px -12px rgba(15,20,23,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sidebar-w:260px;
  --mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:17px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body,button,input,textarea,select{font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif}
h1,h2,h3,h4{margin:0;color:var(--ink);line-height:1.2;font-weight:700}
p{margin:0}
a{color:var(--primary);text-decoration:none;transition:color .24s var(--ease)}
a:hover{color:var(--primary-deep)}
img{display:block;max-width:100%;height:auto}
ul,ol{margin:0;padding:0}
button{font-family:inherit;cursor:pointer}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:4px}
.mono{font-family:var(--mono);letter-spacing:.02em}

/* ============ 布局骨架 ============ */
.main{
  margin-left:var(--sidebar-w);
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 40px;
}
.section{padding:88px 0}
.section.tight{padding:64px 0}
.section.soft{background:var(--soft)}
.section.dark{background:var(--dark);color:#fff}
.sec-head{max-width:760px;margin-bottom:40px}
.sec-head h2{font-size:38px;letter-spacing:-.01em;line-height:1.15}
.sec-head p{margin-top:14px;color:var(--muted);font-size:16.5px;line-height:1.85}
.sec-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);font-size:12px;letter-spacing:.14em;
  color:var(--primary);text-transform:uppercase;margin-bottom:16px;
}
.sec-tag::before{content:"";width:24px;height:2px;background:var(--accent);display:inline-block}

/* ============ 左侧导航 ============ */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
  background:var(--dark);
  display:flex;flex-direction:column;
  padding:28px 18px 22px;
  z-index:80;
  transition:transform .24s var(--ease),width .24s var(--ease);
}
.brand{
  display:flex;align-items:center;gap:12px;
  padding:6px 8px 22px;
  color:#fff;
}
.brand:hover{color:#fff}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;
  display:grid;place-items:center;
  border-radius:10px;
  background:var(--primary);
  color:#fff;font-weight:800;font-size:18px;
  letter-spacing:0;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-line1{font-size:16px;font-weight:800;letter-spacing:.04em;color:#fff}
.brand-line2{
  font-size:13px;font-weight:500;letter-spacing:.24em;color:var(--primary);
  padding-top:3px;border-top:2px solid rgba(18,137,122,.55);margin-top:4px;
}
.nav-list{display:flex;flex-direction:column;gap:4px;margin-top:6px}
.nav-item{
  position:relative;
  display:flex;align-items:center;gap:12px;
  padding:12px 12px 12px 14px;
  border-radius:var(--r-sm);
  color:rgba(255,255,255,.72);
  font-size:14px;line-height:1.45;
  transition:background .24s var(--ease),color .24s var(--ease);
}
.nav-item::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:22px;border-radius:2px;background:transparent;
  transition:background .24s var(--ease);
}
.nav-item:hover{background:rgba(255,255,255,.05);color:#fff}
.nav-item.active{background:rgba(255,255,255,.06);color:var(--primary)}
.nav-item.active::before{background:var(--primary)}
.nav-ico{
  font-family:var(--mono);font-size:11px;letter-spacing:.06em;
  color:rgba(255,255,255,.36);flex:0 0 20px;
}
.nav-item.active .nav-ico{color:var(--accent)}
.sidebar-foot{margin-top:auto;padding-top:22px;display:flex;flex-direction:column;gap:14px}
.sidebar-note{
  font-size:12.5px;line-height:1.75;color:rgba(255,255,255,.42);
  border-top:1px solid rgba(255,255,255,.1);padding-top:14px;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:14px 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1;min-height:46px;
  border:1px solid transparent;
  transition:background .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);
}
.btn i{transition:transform .24s var(--ease);font-size:13px}
.btn:hover i{transform:translateX(4px)}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--elev-1)}
.btn-primary:hover{background:var(--primary-deep);color:#fff}
.btn-ghost{background:transparent;border-color:rgba(20,24,27,.28);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink);background:rgba(20,24,27,.04);color:var(--ink)}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{background:#fff;color:var(--primary-deep)}
.btn-block{width:100%}
.btn-sm{padding:11px 20px;min-height:40px;font-size:14px}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;
  font-weight:600;font-size:15px;color:var(--primary-deep);
  position:relative;
}
.link-arrow::after{
  content:"";position:absolute;left:0;right:0;bottom:-4px;height:1px;
  background:currentColor;transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
}
.link-arrow:hover::after{transform:scaleX(1)}
.link-arrow i{font-size:12px}

/* ============ 移动端顶栏 / 抽屉 ============ */
.topbar{
  display:none;
  position:fixed;top:0;left:0;right:0;height:56px;
  background:var(--dark);z-index:85;
  align-items:center;justify-content:space-between;
  padding:0 16px;border-bottom:1px solid rgba(255,255,255,.1);
}
.topbar .tb-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:15px}
.topbar .tb-brand span.mark{
  width:30px;height:30px;border-radius:8px;background:var(--primary);
  display:grid;place-items:center;font-size:14px;font-weight:800;color:#fff;
}
.nav-toggle{
  width:44px;height:44px;display:grid;place-items:center;
  background:transparent;border:1px solid rgba(255,255,255,.2);
  border-radius:10px;color:#fff;font-size:16px;
}
.scrim{
  display:none;position:fixed;inset:0;background:rgba(11,43,38,.5);z-index:78;
}
.scrim.show{display:block}

/* ============ 面包屑 / 首屏 ============ */
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:14px;color:var(--weak);padding-top:38px;
}
.crumb a{color:var(--weak)}
.crumb a:hover{color:var(--primary)}
.crumb .sep{color:var(--line)}
.crumb .cur{color:var(--primary);font-weight:600}

.page-hero{padding:26px 0 64px}
.badge{
  display:inline-flex;align-items:center;gap:8px;
  height:26px;padding:0 12px;border-radius:var(--r-pill);
  font-size:12px;letter-spacing:.08em;font-weight:600;
  border:1px solid var(--primary);color:var(--primary);
  background:rgba(18,137,122,.06);
}
.badge.solid{background:var(--accent);border-color:var(--accent);color:var(--ink)}
.page-title{
  margin:22px 0 0;
  font-size:58px;font-weight:800;line-height:1.06;letter-spacing:-.02em;
}
.page-title .title-lead{display:block}
.page-title .title-sub{
  display:block;margin-top:10px;
  font-size:34px;font-weight:600;letter-spacing:-.01em;color:var(--primary-deep);
}
.lede{
  max-width:700px;margin-top:24px;
  font-size:17px;line-height:1.9;color:var(--muted);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.metrics{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:18px;margin-top:44px;
  border-top:1px solid var(--line);padding-top:26px;
}
.metric .num{
  font-family:var(--mono);font-size:26px;font-weight:700;
  color:var(--primary-deep);letter-spacing:-.02em;line-height:1.2;
}
.metric .lab{font-size:13px;color:var(--weak);margin-top:4px}

/* ============ 卡片矩阵 2×3 ============ */
.set-grid{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.set-card{
  display:flex;flex-direction:column;gap:14px;
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-md);padding:28px 24px 26px;
  box-shadow:var(--elev-1);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.set-card:hover{transform:translateY(-2px);box-shadow:var(--elev-2);border-color:var(--primary)}
.set-top{display:flex;align-items:center;gap:14px}
.set-ico{
  width:44px;height:44px;flex:0 0 44px;border-radius:var(--r-md);
  display:grid;place-items:center;
  background:rgba(18,137,122,.1);color:var(--primary);font-size:17px;
}
.set-idx{font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--weak)}
.set-card h3{font-size:21px;line-height:1.35}
.set-card p{font-size:15px;line-height:1.8;color:var(--muted)}
.set-meta{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:10px;
  font-family:var(--mono);font-size:12px;color:var(--weak);letter-spacing:.04em;
}
.set-meta .tag{color:var(--primary)}

/* ============ 图文分栏 ============ */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.split.rev .split-media{order:2}
.split-body h2{font-size:38px;line-height:1.15;letter-spacing:-.01em}
.split-body p{margin-top:18px;color:var(--muted);font-size:16.5px;line-height:1.9}
.split-media{
  border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--elev-1);
  background:var(--soft);
}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.mini-list{list-style:none;margin-top:26px;display:grid;gap:12px}
.mini-list li{
  display:grid;grid-template-columns:20px 1fr;gap:12px;
  font-size:15.5px;line-height:1.75;color:var(--ink);
  padding-bottom:12px;border-bottom:1px dashed var(--line);
}
.mini-list li:last-child{border-bottom:0;padding-bottom:0}
.mini-list i{color:var(--primary);font-size:13px;line-height:1.7}

/* ============ 编号清单 ============ */
.check-list{list-style:none;border-top:1px solid var(--line);margin-top:8px}
.check-list li{
  display:grid;grid-template-columns:64px 1fr;gap:20px;
  padding:24px 16px;border-bottom:1px solid var(--line);
  transition:background .24s var(--ease);
}
.check-list li:hover{background:var(--paper)}
.check-list .num{
  font-family:var(--mono);font-size:15px;font-weight:700;
  color:var(--accent);letter-spacing:.06em;line-height:1.6;
}
.check-list h3{font-size:18px;line-height:1.5}
.check-list p{font-size:15px;line-height:1.8;color:var(--muted);margin-top:6px}

/* ============ 流程步骤 ============ */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;border-top:2px solid var(--line);margin-top:8px}
.step{
  position:relative;padding:30px 26px 30px 0;
  border-right:1px solid var(--line);
}
.step:last-child{border-right:0;padding-right:0}
.step .s-num{
  font-family:var(--mono);font-size:32px;font-weight:700;
  color:rgba(18,137,122,.28);line-height:1;letter-spacing:-.02em;
}
.step h3{font-size:17px;margin-top:14px;line-height:1.5}
.step p{font-size:14.5px;line-height:1.8;color:var(--muted);margin-top:8px}

/* ============ FAQ ============ */
.faq{border-top:1px solid var(--line);max-width:860px}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 4px;font-size:18px;font-weight:600;line-height:1.55;color:var(--ink);
  transition:color .24s var(--ease);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{color:var(--primary-deep)}
.faq summary::after{
  content:"+";flex:0 0 auto;font-size:24px;font-weight:400;
  color:var(--primary);line-height:1;transition:transform .24s var(--ease);
}
.faq details[open] summary::after{content:"–";transform:rotate(180deg)}
.faq .faq-body{
  padding:0 36px 24px 16px;
  font-size:15.5px;line-height:1.9;color:var(--muted);
  background:rgba(239,237,230,.45);
  border-left:3px solid var(--primary);
}

/* ============ 结尾 CTA ============ */
.cta-band{background:var(--dark);color:#fff;padding:72px 0}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:40px;flex-wrap:wrap;
}
.cta-inner h2{color:#fff;font-size:34px;line-height:1.2;letter-spacing:-.01em;max-width:640px}
.cta-inner p{color:rgba(255,255,255,.62);font-size:15.5px;line-height:1.85;margin-top:12px;max-width:620px}
.cta-actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.cta-actions .link-arrow{color:#fff}
.cta-actions .link-arrow:hover{color:var(--accent)}

/* ============ 页脚 ============ */
.footer{background:var(--dark);color:rgba(255,255,255,.72);padding:72px 0 0}
.footer-grid{display:grid;grid-template-columns:1.45fr .85fr 1fr 1.05fr;gap:44px}
.footer-brand .brand-line1{display:block;font-size:20px;font-weight:800;color:#fff;letter-spacing:.04em}
.footer-brand .brand-line2{
  display:block;font-size:16px;font-weight:500;letter-spacing:.24em;
  color:var(--primary);margin-top:6px;padding-top:6px;
  border-top:2px solid rgba(18,137,122,.5);max-width:150px;
}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.52)}
.footer h4{
  font-size:14px;font-weight:700;color:#fff;letter-spacing:.06em;
  margin:0 0 18px;padding-bottom:0;
}
.footer ul{list-style:none;display:grid;gap:10px}
.footer ul a{font-size:14px;color:rgba(255,255,255,.66);line-height:1.6}
.footer ul a:hover{color:var(--primary)}
.footer-contact p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.62)}
.footer-contact .mono{font-size:13px;color:var(--accent);margin-top:10px}
.footer-bottom{
  margin-top:52px;border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0;display:flex;align-items:center;justify-content:space-between;
  gap:12px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.42);
}

/* ============ 浮动 CTA / 移动底条 ============ */
.float-cta{
  position:fixed;right:32px;bottom:32px;z-index:70;
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 24px;border-radius:var(--r-pill);
  background:var(--primary);color:#fff;font-size:14.5px;font-weight:600;
  box-shadow:var(--elev-2);
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .24s var(--ease),transform .24s var(--ease),background .24s var(--ease);
}
.float-cta.show{opacity:1;transform:none;pointer-events:auto}
.float-cta:hover{background:var(--primary-deep);color:#fff}
.mobile-cta{display:none}

/* ============ 断点 ============ */
@media (max-width:1199px){
  .sidebar{width:88px;padding:24px 12px 20px;align-items:center}
  .main{margin-left:88px}
  .brand{padding:6px 0 20px;justify-content:center}
  .brand-text{display:none}
  .nav-item{justify-content:center;padding:12px 0;width:100%}
  .nav-label{display:none}
  .nav-ico{flex:0 0 auto;font-size:12px}
  .nav-item::before{left:-6px}
  .sidebar-note{display:none}
  .sidebar-foot{align-items:center;width:100%}
  .sidebar-foot .btn{padding:12px 0;width:44px;min-height:44px;font-size:0}
  .sidebar-foot .btn i{font-size:14px}
  .container{padding:0 32px}
  .split{gap:40px}
}
@media (max-width:991px){
  .sidebar{width:280px;transform:translateX(-100%);padding:26px 20px 22px;align-items:stretch;box-shadow:var(--elev-2)}
  .sidebar.open{transform:none}
  .brand{justify-content:flex-start;padding-left:6px}
  .brand-text{display:flex}
  .nav-item{justify-content:flex-start;padding:12px 12px 12px 14px}
  .nav-label{display:inline}
  .nav-item::before{left:0}
  .sidebar-note{display:block}
  .sidebar-foot .btn{padding:14px 26px;width:100%;font-size:15px}
  .sidebar-foot .btn i{font-size:13px}
  .topbar{display:flex}
  .main{margin-left:0;padding-top:56px}
  .page-title{font-size:42px}
  .page-title .title-sub{font-size:26px}
  .sec-head h2,.split-body h2{font-size:30px}
  .set-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .step{border-right:0;border-bottom:1px solid var(--line);padding:26px 20px 26px 0}
  .step:nth-child(2n){padding-right:0}
  .split{grid-template-columns:1fr;gap:32px}
  .split.rev .split-media{order:0}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:36px}
  .section{padding:64px 0}
}
@media (max-width:767px){
  body{padding-bottom:60px;font-size:16px}
  .container{padding:0 20px}
  .crumb{padding-top:24px;font-size:13px}
  .page-hero{padding:20px 0 44px}
  .page-title{font-size:34px}
  .page-title .title-sub{font-size:21px;margin-top:8px}
  .lede{font-size:16px;line-height:1.8;margin-top:18px}
  .hero-actions{gap:12px;margin-top:26px}
  .hero-actions .btn{width:100%}
  .metrics{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:32px;padding-top:22px}
  .metric .num{font-size:22px}
  .sec-head h2,.split-body h2{font-size:26px}
  .section{padding:52px 0}
  .set-grid{grid-template-columns:1fr;gap:16px}
  .set-card{padding:22px 20px}
  .steps{grid-template-columns:1fr}
  .step{border-right:0;padding:22px 0}
  .check-list li{grid-template-columns:44px 1fr;gap:14px;padding:20px 8px}
  .faq summary{font-size:16.5px;padding:18px 2px}
  .faq .faq-body{padding:0 12px 20px 14px;font-size:15px}
  .cta-inner h2{font-size:26px}
  .cta-actions .btn{width:100%}
  .cta-actions{gap:14px}
  .footer{padding:52px 0 0}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start;padding-bottom:26px}
  .float-cta{display:none}
  .mobile-cta{
    display:flex;position:fixed;left:0;right:0;bottom:0;height:60px;z-index:75;
    background:var(--dark);border-top:1px solid rgba(255,255,255,.12);
    align-items:center;justify-content:space-between;gap:12px;padding:0 16px;
  }
  .mobile-cta span{font-size:13px;color:rgba(255,255,255,.7)}
  .mobile-cta .btn{padding:10px 18px;min-height:40px;font-size:14px}
}
@media (max-width:520px){
  .page-title{font-size:30px}
  .page-title .title-sub{font-size:19px}
  .set-card h3{font-size:19px}
  .cta-inner h2{font-size:23px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* roulang page: category4 */
:root{
  --paper:#F6F4EF;
  --card:#FFFFFF;
  --tint:#EFEDE6;
  --primary:#12897A;
  --primary-deep:#10564A;
  --primary-dark:#0B2B26;
  --accent:#E9A13C;
  --ink:#14181B;
  --muted:#4B555D;
  --weak:#8A939B;
  --line:#E2DFD8;
  --dark:#0F1417;
  --ok:#1F8A5B;
  --warn:#C4552E;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-pill:999px;
  --elev-1:0 1px 2px rgba(15,20,23,.05);
  --elev-2:0 10px 30px -12px rgba(15,20,23,.18);
  --t:240ms cubic-bezier(.2,.7,.3,1);
  --sidebar-w:260px;
  --font:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;padding:0;background:var(--paper);color:var(--ink);
  font-family:var(--font);font-size:17px;line-height:1.8;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
}
h1,h2,h3,h4,h5,p,figure,blockquote{margin:0}
h1,h2,h3,h4{line-height:1.15;font-weight:700;color:var(--ink)}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none;transition:color var(--t)}
img{max-width:100%;display:block;border:0}
button{font-family:inherit}
input,select,textarea{font-family:inherit;font-size:16px}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.mono{font-family:var(--mono);letter-spacing:.02em}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ===== 左侧 App Shell ===== */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);z-index:80;
  background:var(--dark);display:flex;flex-direction:column;
  padding:22px 16px 20px;overflow-y:auto;
  border-right:1px solid rgba(255,255,255,.06);
  transition:width var(--t);
}
.brand{display:flex;flex-direction:column;align-items:flex-start;padding:4px 8px 20px;border-bottom:1px solid rgba(255,255,255,.08);margin-bottom:18px}
.brand-line1{display:block;font-size:21px;font-weight:800;letter-spacing:-.01em;color:#fff;line-height:1.25}
.brand-line2{display:block;position:relative;font-size:21px;font-weight:500;color:rgba(255,255,255,.84);line-height:1.25;padding-bottom:10px}
.brand-line2::after{content:"";position:absolute;left:0;bottom:0;width:30px;height:2px;background:var(--primary);border-radius:2px}
.brand-mark{display:none;width:44px;height:44px;border-radius:10px;border:1px solid rgba(18,137,122,.7);background:rgba(18,137,122,.16);color:#8FE3D6;font-size:19px;font-weight:800;align-items:center;justify-content:center;margin:0 auto}
.nav-list{display:flex;flex-direction:column;gap:2px;flex:1 1 auto}
.nav-item{
  position:relative;display:flex;align-items:center;gap:12px;
  padding:11px 12px;border-radius:var(--r-sm);font-size:14px;font-weight:500;
  color:rgba(255,255,255,.7);transition:background var(--t),color var(--t);
  min-height:44px;
}
.nav-item::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:3px;height:18px;border-radius:2px;background:transparent;transition:background var(--t)}
.nav-item:hover{background:rgba(255,255,255,.06);color:#fff}
.nav-item.active{color:var(--primary);background:rgba(255,255,255,.04)}
.nav-item.active::before{background:var(--primary)}
.nav-ico{font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:rgba(255,255,255,.34);flex:0 0 auto;min-width:20px;transition:color var(--t)}
.nav-item.active .nav-ico{color:var(--accent)}
.nav-label{flex:1 1 auto}
.side-foot{margin-top:24px;padding-top:18px;border-top:1px solid rgba(255,255,255,.08)}
.side-foot .btn{width:100%;justify-content:center;font-size:14px;padding:13px 16px}
.side-note{margin-top:14px;font-size:12.5px;line-height:1.75;color:rgba(255,255,255,.42)}
.side-note .mono{display:block;color:rgba(18,137,122,.9);font-size:12px;margin-top:6px}

/* ===== 主区域 ===== */
.main{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column;transition:margin-left var(--t)}
.page{flex:1 1 auto}

/* ===== 移动顶栏 ===== */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;z-index:70;height:64px;
  background:rgba(15,20,23,.96);align-items:center;gap:14px;padding:0 18px;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.hamburger{width:44px;height:44px;border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.05);border-radius:10px;color:#fff;font-size:18px;line-height:1;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:background var(--t)}
.hamburger:hover{background:rgba(18,137,122,.28)}
.topbar-brand{color:#fff;font-size:16px;font-weight:700;letter-spacing:.01em}
.topbar-brand:hover{color:var(--primary)}

/* ===== 抽屉 ===== */
.drawer{
  position:fixed;top:0;left:0;bottom:0;width:min(320px,86vw);z-index:90;
  background:var(--dark);transform:translateX(-100%);transition:transform var(--t);
  padding:22px 18px;display:flex;flex-direction:column;overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;padding-bottom:18px;border-bottom:1px solid rgba(255,255,255,.08);margin-bottom:16px}
.drawer-close{width:44px;height:44px;border-radius:10px;border:1px solid rgba(255,255,255,.14);background:transparent;color:#fff;font-size:18px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center}
.drawer-close:hover{background:rgba(255,255,255,.08)}
.drawer-mask{position:fixed;inset:0;background:rgba(11,43,38,.58);z-index:85;opacity:0;visibility:hidden;transition:opacity var(--t),visibility var(--t)}
.drawer-mask.show{opacity:1;visibility:visible}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:14px 28px;border-radius:var(--r-pill);border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
  min-height:44px;text-align:center;
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--elev-2)}
.btn-primary::after{content:"→";font-family:var(--mono);transition:transform var(--t)}
.btn-primary:hover::after{transform:translateX(4px)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.3);color:#fff}
.btn-ghost:hover{border-color:var(--primary);color:#8FE3D6;background:rgba(18,137,122,.14)}
.btn-outline{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);background:rgba(18,137,122,.06)}
.text-link{display:inline-flex;align-items:center;gap:6px;position:relative;color:var(--primary-deep);font-size:15px;font-weight:600}
.text-link::after{content:"";position:absolute;left:0;bottom:-3px;width:100%;height:1px;background:currentColor;transform:scaleX(0);transform-origin:left;transition:transform var(--t)}
.text-link:hover::after{transform:scaleX(1)}
.text-link.on-dark{color:var(--accent)}

/* ===== Hero ===== */
.hero{position:relative;background:var(--dark);color:#fff;padding:76px 0 96px;overflow:hidden}
.hero-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.png');background-size:cover;background-position:center;opacity:.55;z-index:0}
.hero::after{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(115deg,rgba(15,20,23,.95) 0%,rgba(11,43,38,.88) 52%,rgba(15,20,23,.7) 100%)}
.hero .container{position:relative;z-index:2}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,.5);margin-bottom:22px}
.crumbs a{color:rgba(255,255,255,.62)}
.crumbs a:hover{color:var(--primary)}
.crumbs .sep{color:rgba(255,255,255,.28)}
.crumbs .cur{color:var(--accent)}
.badge{display:inline-flex;align-items:center;gap:8px;height:24px;padding:0 12px;border-radius:var(--r-pill);font-size:12px;letter-spacing:.12em;border:1px solid rgba(18,137,122,.55);color:#8FE3D6;background:rgba(18,137,122,.16)}
.hero h1{margin-top:18px;font-size:clamp(30px,3.9vw,54px);font-weight:800;letter-spacing:-.02em;line-height:1.1;color:#fff;max-width:17em}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero-lead{margin-top:18px;font-size:17px;line-height:1.85;color:rgba(255,255,255,.76);max-width:44em}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.14)}
.hero-stat{padding-right:16px}
.hero-stat + .hero-stat{padding-left:22px;border-left:1px solid rgba(255,255,255,.12)}
.hero-stat b{display:block;font-family:var(--mono);font-size:20px;font-weight:600;color:#fff;letter-spacing:-.01em}
.hero-stat span{display:block;margin-top:4px;font-size:13px;color:rgba(255,255,255,.48)}

/* ===== 检索条 ===== */
.lookup{padding:0 0 8px;position:relative;z-index:5;margin-top:-44px}
.lookup-box{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--elev-2);padding:28px 32px}
.lookup-box h2{font-size:20px;font-weight:700}
.lookup-box .sub{margin-top:6px;font-size:14.5px;color:var(--muted)}
.lookup-field{display:flex;gap:12px;margin-top:16px}
.lookup-input{
  flex:1 1 auto;width:100%;padding:13px 16px;border:1px solid var(--line);
  border-radius:var(--r-sm);background:var(--paper);color:var(--ink);
  transition:border-color var(--t),box-shadow var(--t),background var(--t);
  min-height:48px;
}
.lookup-input::placeholder{color:var(--weak)}
.lookup-input:focus{outline:none;border-color:var(--primary);background:#fff;box-shadow:0 0 0 3px rgba(18,137,122,.14)}
.hot-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.tag{
  font-size:13px;padding:7px 14px;border-radius:var(--r-pill);border:1px solid var(--line);
  background:var(--paper);color:var(--muted);cursor:pointer;transition:all var(--t);min-height:34px;
}
.tag:hover{border-color:var(--primary);color:var(--primary);background:rgba(18,137,122,.06)}
.lookup-hint{margin-top:14px;font-size:13.5px;color:var(--weak);font-family:var(--mono)}

/* ===== 通用板块 ===== */
.section{padding:84px 0}
.section-head{max-width:760px;margin-bottom:36px}
.section-head h2{font-size:clamp(26px,2.9vw,38px);font-weight:700;letter-spacing:-.01em}
.section-head p{margin-top:14px;font-size:16px;color:var(--muted);line-height:1.85}
.eyebrow{display:inline-block;font-family:var(--mono);font-size:12px;letter-spacing:.16em;color:var(--primary);margin-bottom:12px}

/* ===== FAQ ===== */
.faq-zone{padding:72px 0 84px}
.faq-group{margin-top:42px}
.faq-group:first-of-type{margin-top:0}
.faq-group h3{display:flex;align-items:center;gap:12px;font-size:20px;font-weight:700;margin-bottom:10px}
.faq-group h3 .num{font-family:var(--mono);font-size:13px;letter-spacing:.1em;color:var(--accent);font-weight:600}
.faq-item{border-top:1px solid var(--line);transition:background var(--t)}
.faq-item:last-child{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:flex-start;justify-content:space-between;gap:18px;
  padding:18px 6px;font-size:17px;font-weight:600;color:var(--ink);min-height:44px;transition:color var(--t);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-family:var(--mono);font-size:20px;line-height:1;color:var(--primary);flex:0 0 auto;margin-top:4px}
.faq-item[open] summary::after{content:"−"}
.faq-item summary:hover{color:var(--primary)}
.faq-item[open]{background:rgba(239,237,230,.55)}
.faq-item[open] summary{color:var(--primary-deep)}
.faq-body{padding:0 6px 22px 16px;font-size:15.5px;line-height:1.9;color:var(--muted);max-width:70em}
.faq-body strong{color:var(--ink);font-weight:600}

/* ===== 三步自查 ===== */
.flow{background:var(--tint);padding:84px 0}
.flow-grid{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,7fr);gap:56px;align-items:start}
.flow-intro h2{font-size:clamp(25px,2.6vw,34px)}
.flow-intro p{margin-top:14px;color:var(--muted);font-size:16px}
.flow-list li{display:flex;gap:22px;padding:24px 0;border-top:1px solid rgba(226,223,216,.9)}
.flow-list li:first-child{border-top:none;padding-top:0}
.flow-list .num{font-family:var(--mono);font-size:22px;font-weight:600;color:var(--primary);flex:0 0 auto;line-height:1.2}
.flow-list h3{font-size:18px;margin-bottom:8px}
.flow-list p{margin:0;font-size:15.5px;line-height:1.85;color:var(--muted)}

/* ===== 图文核对 ===== */
.evidence{padding:88px 0}
.evidence-grid{display:grid;grid-template-columns:minmax(0,6fr) minmax(0,5fr);gap:52px;align-items:center}
.evidence-media{margin:0;position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--elev-1);aspect-ratio:16/11;background:var(--tint)}
.evidence-media img{width:100%;height:100%;object-fit:cover}
.evidence-text h2{font-size:clamp(24px,2.6vw,34px)}
.evidence-text > p{margin-top:14px;font-size:16px;color:var(--muted);line-height:1.85}
.check-list{margin-top:26px}
.check-list li{position:relative;padding:11px 0 11px 30px;border-bottom:1px dashed var(--line);font-size:15.5px;color:var(--muted);line-height:1.8}
.check-list li:last-child{border-bottom:none}
.check-list li::before{content:"✓";position:absolute;left:0;top:11px;color:var(--ok);font-weight:700;font-size:15px}

/* ===== 联系 ===== */
.support{padding:0 0 88px}
.support-grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:32px;align-items:start}
.support-card{background:var(--dark);color:#fff;border-radius:var(--r-lg);padding:38px 32px;box-shadow:var(--elev-2)}
.support-card h2{font-size:26px;color:#fff;line-height:1.25}
.support-card p{margin-top:14px;font-size:15.5px;line-height:1.85;color:rgba(255,255,255,.66)}
.support-meta{margin-top:24px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);font-size:14px;color:rgba(255,255,255,.56);line-height:2}
.support-meta .mono{display:block;color:var(--accent);font-size:13px;margin-top:8px}
.support-form{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:32px;box-shadow:var(--elev-1);display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:7px}
.field.full{grid-column:1 / -1}
.field label{font-size:14px;color:var(--muted);font-weight:500}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:var(--r-sm);
  background:#fff;color:var(--ink);transition:border-color var(--t),box-shadow var(--t);margin:0;
}
.field textarea{min-height:108px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(18,137,122,.14)}
.field input::placeholder,.field textarea::placeholder{color:var(--weak)}
.form-note{grid-column:1 / -1;font-size:13px;color:var(--weak);line-height:1.8}

/* ===== CTA 带 ===== */
.cta-band{background:var(--primary-dark);padding:60px 0}
.cta-flex{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-flex h2{font-size:clamp(22px,2.4vw,30px);color:#fff;max-width:26em;line-height:1.35}
.cta-flex .actions{display:flex;align-items:center;gap:22px;flex-wrap:wrap}

/* ===== 页脚 ===== */
.footer{background:var(--dark);color:rgba(255,255,255,.7);padding:64px 0 0;margin-top:auto;border-top:1px solid rgba(255,255,255,.06)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.footer h4{font-size:14px;color:#fff;font-weight:700;letter-spacing:.04em;margin-bottom:16px}
.footer ul li{margin-bottom:10px}
.footer a{font-size:14px;color:rgba(255,255,255,.58)}
.footer a:hover{color:var(--primary)}
.footer-brand .brand-line1,.footer-brand .brand-line2{font-size:19px}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.5);max-width:30em}
.footer-contact p{font-size:14px;line-height:1.9;color:rgba(255,255,255,.58)}
.footer-contact .mono{color:var(--accent);font-size:13px;margin-top:8px;display:block}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:20px 0 30px;border-top:1px solid rgba(255,255,255,.1);font-size:13px;color:rgba(255,255,255,.42)}

/* ===== 浮动 CTA ===== */
.float-cta{
  position:fixed;right:32px;bottom:32px;z-index:60;
  display:inline-flex;align-items:center;gap:8px;padding:14px 24px;border-radius:var(--r-pill);
  background:var(--primary);color:#fff;font-size:14px;font-weight:600;
  box-shadow:var(--elev-2);opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity var(--t),transform var(--t),visibility var(--t),background var(--t);
}
.float-cta::after{content:"→";font-family:var(--mono)}
.float-cta.show{opacity:1;visibility:visible;transform:none}
.float-cta:hover{background:var(--primary-deep);color:#fff}

/* ===== 移动底栏 ===== */
.mobile-bar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:65;height:60px;
  background:var(--dark);border-top:1px solid rgba(255,255,255,.1);
  align-items:center;justify-content:space-between;gap:12px;padding:0 16px;
}
.mobile-bar span{font-size:13px;color:rgba(255,255,255,.74);line-height:1.4}
.mobile-bar .btn{padding:11px 18px;font-size:14px;flex:0 0 auto}

/* ===== 断点 ===== */
@media (min-width:992px) and (max-width:1199px){
  :root{--sidebar-w:88px}
  .sidebar{padding:22px 10px 20px}
  .brand{padding:4px 0 18px;align-items:center;border-bottom:none;margin-bottom:12px}
  .brand-full{display:none}
  .brand-mark{display:flex}
  .nav-label{display:none}
  .nav-item{justify-content:center;padding:12px 0;gap:0}
  .nav-ico{min-width:auto;font-size:12px}
  .side-foot .btn{font-size:0;padding:13px 0;gap:0}
  .side-foot .btn::after{content:"→";font-size:16px}
  .side-note{display:none}
  .evidence-grid,.flow-grid,.support-grid{gap:36px}
}
@media (max-width:991px){
  .sidebar{display:none}
  .main{margin-left:0;padding-top:64px}
  .topbar{display:flex}
  .hero{padding:56px 0 84px}
  .hero-stats{grid-template-columns:repeat(2,1fr);row-gap:20px}
  .hero-stat:nth-child(3){padding-left:0;border-left:none}
  .flow-grid,.evidence-grid,.support-grid{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:64px 0}
  .flow,.evidence{padding:64px 0}
  .support{padding-bottom:64px}
  .float-cta{right:20px;bottom:20px}
}
@media (max-width:767px){
  body{font-size:16px;padding-bottom:60px}
  .main{padding-top:56px}
  .topbar{height:56px}
  .container{padding:0 20px}
  .hero{padding:44px 0 76px}
  .hero h1{font-size:34px}
  .hero-lead{font-size:16px}
  .hero-actions{gap:10px}
  .hero-actions .btn{width:100%}
  .hero-stats{grid-template-columns:1fr 1fr;margin-top:32px}
  .hero-stat b{font-size:18px}
  .lookup{margin-top:-32px}
  .lookup-box{padding:22px 20px}
  .lookup-field{flex-direction:column}
  .lookup-field .btn{width:100%}
  .section{padding:56px 0}
  .faq-zone{padding:48px 0 56px}
  .faq-item summary{font-size:16px;padding:16px 2px}
  .faq-body{padding:0 2px 20px 12px;font-size:15px}
  .flow-list li{gap:16px;padding:20px 0}
  .flow-list .num{font-size:19px}
  .support-form{grid-template-columns:1fr;padding:24px 20px}
  .footer{padding:48px 0 0}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .footer-bottom{font-size:12.5px}
  .mobile-bar{display:flex}
  .float-cta{display:none}
  .cta-flex{flex-direction:column;align-items:flex-start;gap:22px}
  .cta-flex .actions{width:100%}
  .cta-flex .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:.001ms !important;animation-duration:.001ms !important;scroll-behavior:auto !important}
  .btn:hover,.float-cta{transform:none !important}
}

/* roulang page: category5 */
/* ============ 设计变量 ============ */
:root{
  --bg:#F6F4EF;
  --card:#FFFFFF;
  --bg-soft:#EFEDE6;
  --primary:#12897A;
  --primary-dark:#10564A;
  --primary-deep:#0B2B26;
  --accent:#E9A13C;
  --ink:#14181B;
  --ink-2:#4B555D;
  --ink-3:#8A939B;
  --line:#E2DFD8;
  --dark:#0F1417;
  --ok:#1F8A5B;
  --warn:#C4552E;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-pill:999px;
  --e1:0 1px 2px rgba(15,20,23,.05);
  --e2:0 10px 30px -12px rgba(15,20,23,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sidebar:260px;
}

/* ============ 基础重置 ============ */
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:17px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;transition:color .24s var(--ease);}
a:hover{color:var(--primary);}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;padding:0;}
ul,ol{list-style:none;}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input,select,textarea{font-family:inherit;font-size:16px;color:var(--ink);}
::selection{background:rgba(18,137,122,.18);}
.mono{font-family:ui-monospace,"JetBrains Mono",Menlo,Consolas,monospace;font-variant-numeric:tabular-nums;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}

/* ============ 容器 ============ */
.container{width:100%;max-width:1120px;margin:0 auto;padding:0 24px;}
.main-wrap{
  margin-left:var(--sidebar);
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
.main{flex:1 1 auto;}

/* ============ 跳转链接 ============ */
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:var(--primary);color:#fff;padding:10px 18px;border-radius:0 0 var(--r-sm) 0;
}
.skip-link:focus{left:0;}

/* ============ 左侧导航 ============ */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;
  width:var(--sidebar);
  background:var(--dark);
  color:#fff;
  display:flex;flex-direction:column;
  padding:22px 16px 20px;
  z-index:80;
  border-right:1px solid rgba(255,255,255,.06);
}
.sidebar-brand{
  display:flex;align-items:center;gap:12px;
  padding:2px 10px 20px;
  border-bottom:1px solid rgba(255,255,255,.08);
  margin-bottom:16px;
}
.brand-mark{
  display:none;
  width:42px;height:42px;flex:0 0 42px;
  place-items:center;
  background:var(--primary);color:#fff;
  border-radius:10px;
  font-weight:800;font-size:20px;
}
.brand-text{display:block;}
.brand-line1{
  display:block;font-weight:800;font-size:19px;line-height:1.15;
  letter-spacing:.02em;color:#fff;
}
.brand-line2{
  display:block;font-weight:500;font-size:13px;line-height:1.4;
  letter-spacing:.2em;color:var(--primary);
  margin-top:5px;padding-top:5px;
  border-top:1px solid rgba(18,137,122,.55);
}
.nav-list{display:flex;flex-direction:column;gap:2px;flex:1 1 auto;overflow-y:auto;padding-right:2px;}
.nav-item{
  position:relative;
  display:flex;align-items:center;gap:10px;
  padding:11px 12px;border-radius:10px;
  font-size:14px;line-height:1.4;
  color:rgba(255,255,255,.72);
  transition:background .24s var(--ease),color .24s var(--ease);
  min-height:44px;
}
.nav-item::before{
  content:"";position:absolute;left:0;top:50%;
  width:3px;height:0;border-radius:3px;
  background:var(--primary);
  transform:translateY(-50%);
  transition:height .24s var(--ease);
}
.nav-item:hover{background:rgba(255,255,255,.05);color:#fff;}
.nav-item.active{color:var(--primary);background:rgba(255,255,255,.04);}
.nav-item.active::before{height:18px;}
.nav-ico{
  font-family:ui-monospace,"JetBrains Mono",monospace;
  font-size:11px;letter-spacing:.08em;
  color:rgba(255,255,255,.36);
  flex:0 0 auto;
}
.nav-item.active .nav-ico{color:var(--accent);}
.nav-label{display:block;}

.sidebar-foot{margin-top:16px;border-top:1px solid rgba(255,255,255,.08);padding-top:16px;}
.btn-sidebar{
  display:flex;align-items:center;justify-content:center;gap:8px;
  width:100%;min-height:46px;
  background:var(--primary);color:#fff;
  border-radius:var(--r-pill);
  font-size:14px;font-weight:600;
  transition:background .24s var(--ease),transform .24s var(--ease);
}
.btn-sidebar:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px);}
.sidebar-contact{
  margin-top:14px;
  font-size:12px;line-height:1.9;
  color:rgba(255,255,255,.44);
}
.sidebar-contact .mono{color:rgba(255,255,255,.62);}

/* ============ 顶部栏（移动端） ============ */
.topbar{
  display:none;
  position:fixed;top:0;left:0;right:0;height:64px;
  z-index:90;
  background:var(--dark);
  align-items:center;gap:12px;
  padding:0 16px;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.menu-toggle{
  width:44px;height:44px;flex:0 0 44px;
  display:grid;place-items:center;
  border-radius:10px;
  background:rgba(255,255,255,.06);
  color:#fff;
}
.menu-toggle:hover{background:rgba(255,255,255,.12);}
.menu-toggle span{
  display:block;width:18px;height:2px;background:#fff;border-radius:2px;position:relative;
}
.menu-toggle span::before,
.menu-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:#fff;border-radius:2px;
}
.menu-toggle span::before{top:-6px;}
.menu-toggle span::after{top:6px;}
.topbar-brand{
  display:flex;flex-direction:column;line-height:1.15;
  font-weight:800;font-size:15px;color:#fff;letter-spacing:.02em;
}
.topbar-brand small{
  font-weight:500;font-size:10px;letter-spacing:.2em;color:var(--primary);
}
.topbar-cta{
  margin-left:auto;
  display:inline-flex;align-items:center;
  height:38px;padding:0 16px;
  border-radius:var(--r-pill);
  background:var(--primary);color:#fff;
  font-size:13px;font-weight:600;
}
.topbar-cta:hover{background:var(--primary-dark);color:#fff;}

.sidebar-backdrop{
  position:fixed;inset:0;z-index:70;
  background:rgba(15,20,23,.5);
  opacity:0;pointer-events:none;
  transition:opacity .28s var(--ease);
}
.sidebar-backdrop.show{opacity:1;pointer-events:auto;}

/* ============ 面包屑 ============ */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:14px;color:var(--ink-3);
  padding-top:36px;
}
.breadcrumb a{color:var(--ink-2);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:var(--line);}
.breadcrumb .current{color:var(--primary);font-weight:600;}

/* ============ 徽章 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:24px;padding:0 12px;
  border-radius:var(--r-pill);
  font-size:12px;letter-spacing:.1em;line-height:1;
  white-space:nowrap;
}
.badge-outline{border:1px solid rgba(18,137,122,.45);color:var(--primary-dark);background:rgba(18,137,122,.06);}
.badge-solid{background:var(--accent);color:var(--ink);font-weight:600;letter-spacing:.06em;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:48px;padding:0 28px;
  border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1;
  transition:background .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);
  white-space:nowrap;
}
.btn .arrow{transition:transform .24s var(--ease);font-size:15px;}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--e1);}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--e2);}
.btn-primary:hover .arrow{transform:translateX(4px);}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--ink);}
.btn-ghost:hover{color:var(--primary);border-color:var(--primary);transform:translateY(-1px);}
.btn-ghost:hover .arrow{transform:translateX(4px);}
.btn-block{width:100%;}
.link-underline{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--primary-dark);
}
.link-underline::after{
  content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;
  background:var(--accent);
  transform:scaleX(0);transform-origin:left center;
  transition:transform .24s var(--ease);
}
.link-underline:hover{color:var(--primary);}
.link-underline:hover::after{transform:scaleX(1);}

/* ============ Hero ============ */
.hero{padding-bottom:8px;}
.hero-grid{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:48px;
  align-items:center;
  padding:36px 0 56px;
}
.hero-copy h1{
  font-size:clamp(34px,4.2vw,58px);
  line-height:1.08;
  letter-spacing:-.02em;
  font-weight:800;
  margin:16px 0 18px;
}
.hero-copy h1 em{
  font-style:normal;color:var(--primary);
}
.hero-lead{
  font-size:18px;line-height:1.85;color:var(--ink-2);
  max-width:38em;
}
.hero-actions{
  display:flex;flex-wrap:wrap;gap:14px;
  margin-top:28px;
}
.hero-facts{
  display:flex;flex-wrap:wrap;gap:28px;
  margin-top:34px;
  padding-top:22px;
  border-top:1px solid var(--line);
}
.hero-facts li{display:flex;flex-direction:column;gap:2px;}
.hero-facts b{
  font-size:20px;font-weight:700;color:var(--primary-dark);
  letter-spacing:-.01em;
}
.hero-facts span{font-size:13px;color:var(--ink-3);letter-spacing:.04em;}
.hero-media{
  position:relative;
  border-radius:var(--r-lg);
  overflow:hidden;
  box-shadow:var(--e2);
  background:var(--dark);
  aspect-ratio:4/3;
}
.hero-media img{
  width:100%;height:100%;object-fit:cover;
}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(200deg,rgba(15,20,23,0) 40%,rgba(11,43,38,.82) 100%);
}
.hero-media figcaption{
  position:absolute;left:22px;right:22px;bottom:20px;z-index:2;
  color:#fff;font-size:14px;line-height:1.7;
  text-shadow:0 1px 12px rgba(0,0,0,.4);
}
.hero-media figcaption b{display:block;font-size:16px;font-weight:700;margin-bottom:2px;}

/* ============ 板块通用 ============ */
.section{padding:84px 0;}
.section-soft{background:var(--bg-soft);}
.section-head{max-width:720px;margin-bottom:44px;}
.section-head h2{
  font-size:clamp(26px,3vw,38px);
  line-height:1.18;
  letter-spacing:-.015em;
  font-weight:700;
  margin:12px 0 14px;
}
.section-head p{color:var(--ink-2);font-size:17px;}
.eyebrow{
  font-family:ui-monospace,"JetBrains Mono",monospace;
  font-size:12px;letter-spacing:.18em;color:var(--primary);
  text-transform:uppercase;
}

/* ============ 合作申请：左文右表单 ============ */
.apply-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:start;
}
.apply-copy h2{
  font-size:clamp(26px,3vw,36px);
  line-height:1.2;font-weight:700;letter-spacing:-.015em;
  margin:12px 0 16px;
}
.apply-copy p{color:var(--ink-2);margin-bottom:22px;}
.check-list{display:flex;flex-direction:column;gap:14px;margin:0 0 28px;}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;
  font-size:15px;color:var(--ink-2);line-height:1.75;
}
.check-list li strong{color:var(--ink);font-weight:600;}
.check-mark{
  flex:0 0 20px;width:20px;height:20px;margin-top:4px;
  border-radius:50%;
  background:rgba(18,137,122,.12);
  color:var(--primary-dark);
  display:grid;place-items:center;
  font-size:11px;font-weight:700;
}
.apply-figure{
  border-radius:var(--r-md);
  overflow:hidden;
  box-shadow:var(--e1);
  border:1px solid var(--line);
  aspect-ratio:16/9;
  background:var(--bg-soft);
}
.apply-figure img{width:100%;height:100%;object-fit:cover;}

.form-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--e1);
  padding:30px 30px 26px;
}
.form-card h3{
  font-size:22px;font-weight:700;letter-spacing:-.01em;
  margin-bottom:6px;
}
.form-card .form-sub{
  font-size:14px;color:var(--ink-3);margin-bottom:22px;
}
.field{margin-bottom:16px;}
.field label{
  display:block;
  font-size:14px;color:var(--ink-2);font-weight:500;
  margin-bottom:6px;
}
.field input,
.field select,
.field textarea{
  width:100%;
  padding:12px 14px;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  background:#FDFCFA;
  color:var(--ink);
  line-height:1.6;
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease),background .24s var(--ease);
}
.field textarea{min-height:104px;resize:vertical;}
.field input:focus,
.field select:focus,
.field textarea:focus{
  outline:none;
  border-color:var(--primary);
  background:#fff;
  box-shadow:0 0 0 3px rgba(18,137,122,.14);
}
.field input::placeholder,
.field textarea::placeholder{color:var(--ink-3);}
.form-note{
  margin-top:14px;
  font-size:13px;color:var(--ink-3);
  line-height:1.7;
}
.form-note.is-done{color:var(--ok);font-weight:600;}

/* ============ 支持范围清单 ============ */
.rows{border-top:1px solid var(--line);}
.row-item{
  display:grid;
  grid-template-columns:64px 1fr 180px;
  gap:24px;
  align-items:start;
  padding:26px 12px;
  border-bottom:1px solid var(--line);
  transition:background .24s var(--ease);
}
.row-item:hover{background:var(--bg-soft);}
.row-num{
  font-family:ui-monospace,"JetBrains Mono",monospace;
  font-size:22px;font-weight:700;color:var(--accent);
  letter-spacing:.02em;line-height:1.2;
}
.row-body h3{
  font-size:19px;font-weight:600;letter-spacing:-.005em;
  margin-bottom:6px;
}
.row-body p{font-size:15px;color:var(--ink-2);line-height:1.8;max-width:52em;}
.row-meta{
  text-align:right;
  font-family:ui-monospace,"JetBrains Mono",monospace;
  font-size:13px;color:var(--primary-dark);
  letter-spacing:.02em;
  padding-top:3px;
}

/* ============ 数据条 ============ */
.metrics{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
  margin-bottom:44px;
}
.metric{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:22px 20px;
  box-shadow:var(--e1);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.metric:hover{transform:translateY(-2px);box-shadow:var(--e2);border-color:var(--primary);}
.metric-num{
  display:block;
  font-size:30px;font-weight:700;color:var(--primary-dark);
  letter-spacing:-.02em;line-height:1.1;
}
.metric-num em{font-style:normal;font-size:14px;font-weight:600;margin-left:4px;color:var(--ink-2);}
.metric-label{
  display:block;margin-top:8px;
  font-size:13px;color:var(--ink-3);letter-spacing:.04em;
}
.soft-grid{
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:48px;
  align-items:start;
}
.soft-grid h2{
  font-size:clamp(24px,2.6vw,32px);
  font-weight:700;line-height:1.22;letter-spacing:-.015em;
  margin-bottom:16px;
}
.soft-grid p{color:var(--ink-2);font-size:16px;line-height:1.9;}
.info-list{
  display:flex;flex-direction:column;gap:14px;
}
.info-list li{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:16px 18px;
  box-shadow:var(--e1);
}
.info-list strong{display:block;font-size:15px;font-weight:600;margin-bottom:2px;}
.info-list span{font-size:14px;color:var(--ink-2);line-height:1.7;}

/* ============ 分类互链 ============ */
.cross{display:flex;flex-direction:column;border-top:1px solid var(--line);}
.cross a{
  display:flex;align-items:center;gap:18px;
  padding:22px 8px;
  border-bottom:1px solid var(--line);
  transition:background .24s var(--ease),padding-left .24s var(--ease);
}
.cross a:hover{background:var(--bg-soft);padding-left:16px;color:var(--ink);}
.cross .c-idx{
  font-family:ui-monospace,"JetBrains Mono",monospace;
  font-size:12px;color:var(--ink-3);letter-spacing:.1em;
  flex:0 0 34px;
}
.cross .c-title{font-size:18px;font-weight:600;letter-spacing:-.005em;}
.cross .c-desc{font-size:14px;color:var(--ink-3);margin-left:auto;text-align:right;}
.cross .c-arrow{color:var(--primary);font-size:16px;flex:0 0 auto;}

/* ============ 结尾 CTA ============ */
.cta-band{
  background:var(--dark);
  color:#fff;
  padding:64px 0;
}
.cta-inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;
}
.cta-inner h2{
  font-size:clamp(24px,3vw,34px);
  font-weight:700;line-height:1.24;letter-spacing:-.015em;
  max-width:22em;
}
.cta-inner p{
  margin-top:10px;font-size:15px;color:rgba(255,255,255,.6);
}
.cta-actions{display:flex;flex-wrap:wrap;align-items:center;gap:20px;}
.cta-actions .link-underline{color:#fff;}
.cta-actions .link-underline:hover{color:var(--accent);}

/* ============ 页脚 ============ */
.footer{
  background:var(--dark);
  color:rgba(255,255,255,.66);
  padding:64px 0 28px;
  border-top:1px solid rgba(255,255,255,.08);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:40px;
}
.footer-brand .brand-line1{font-size:18px;}
.footer-brand .brand-line2{font-size:12px;letter-spacing:.2em;margin-top:6px;padding-top:6px;}
.footer-brand p{
  margin-top:16px;
  font-size:14px;line-height:1.9;color:rgba(255,255,255,.5);
  max-width:30em;
}
.footer h4{
  font-size:14px;font-weight:600;color:#fff;
  letter-spacing:.04em;margin-bottom:14px;
}
.footer ul{display:flex;flex-direction:column;gap:10px;}
.footer ul a{font-size:14px;color:rgba(255,255,255,.62);}
.footer ul a:hover{color:var(--primary);}
.footer-contact p{font-size:14px;line-height:1.9;color:rgba(255,255,255,.6);}
.footer-contact .mono{color:var(--accent);font-size:13px;margin-top:8px;}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  margin-top:48px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.1);
  font-size:13px;color:rgba(255,255,255,.42);
}
.footer-bottom .mono{letter-spacing:.06em;}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;right:32px;bottom:32px;z-index:60;
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 24px;
  background:var(--primary);color:#fff;
  border-radius:var(--r-pill);
  font-size:15px;font-weight:600;
  box-shadow:var(--e2);
  opacity:0;pointer-events:none;transform:translateY(10px);
  transition:opacity .28s var(--ease),transform .28s var(--ease),background .24s var(--ease);
}
.float-cta.show{opacity:1;pointer-events:auto;transform:none;}
.float-cta:hover{background:var(--primary-dark);color:#fff;}
.float-cta .arrow{transition:transform .24s var(--ease);}
.float-cta:hover .arrow{transform:translateX(4px);}
.fc-text{display:none;}

/* ============ 响应式：1199 / 991 / 767 ============ */
@media (max-width:1199px){
  :root{--sidebar:88px;}
  .sidebar{padding:20px 10px;}
  .sidebar-brand{padding:2px 4px 18px;justify-content:center;}
  .brand-text{display:none;}
  .brand-mark{display:grid;}
  .nav-item{justify-content:center;padding:11px 6px;}
  .nav-label{display:none;}
  .nav-ico{font-size:12px;color:rgba(255,255,255,.7);}
  .nav-item.active .nav-ico{color:var(--primary);}
  .btn-sidebar{padding:0;font-size:13px;}
  .btn-sidebar .btn-text{display:none;}
  .sidebar-contact{display:none;}
  .hero-grid{gap:32px;}
}

@media (max-width:991px){
  .topbar{display:flex;}
  .sidebar{
    width:286px;
    padding:20px 16px;
    transform:translateX(-102%);
    transition:transform .3s var(--ease);
    box-shadow:var(--e2);
  }
  .sidebar.open{transform:none;}
  .sidebar-brand{justify-content:flex-start;padding-left:8px;}
  .brand-text{display:block;}
  .brand-mark{display:none;}
  .nav-item{justify-content:flex-start;padding:11px 12px;}
  .nav-label{display:block;}
  .sidebar-contact{display:block;}
  .btn-sidebar .btn-text{display:inline;}
  .main-wrap{margin-left:0;padding-top:64px;}
  .hero-grid{grid-template-columns:1fr;gap:32px;padding:28px 0 44px;}
  .hero-media{aspect-ratio:16/9;order:-1;}
  .apply-grid{grid-template-columns:1fr;gap:36px;}
  .soft-grid{grid-template-columns:1fr;gap:28px;}
  .metrics{grid-template-columns:repeat(2,1fr);}
  .row-item{grid-template-columns:48px 1fr;gap:16px;}
  .row-meta{grid-column:2;text-align:left;padding-top:0;padding-bottom:2px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .section{padding:64px 0;}
}

@media (max-width:767px){
  body{font-size:16px;line-height:1.75;padding-bottom:70px;}
  .topbar{height:56px;padding:0 12px;}
  .main-wrap{padding-top:56px;}
  .hero-copy h1{font-size:clamp(30px,8vw,36px);}
  .hero-lead{font-size:16px;}
  .hero-facts{gap:20px;}
  .hero-facts b{font-size:18px;}
  .hero-actions .btn{width:100%;}
  .breadcrumb{padding-top:24px;font-size:13px;}
  .section{padding:52px 0;}
  .container{padding:0 18px;}
  .form-card{padding:22px 18px;}
  .metrics{grid-template-columns:1fr 1fr;gap:12px;}
  .metric{padding:16px 14px;}
  .metric-num{font-size:24px;}
  .row-item{grid-template-columns:1fr;gap:8px;padding:20px 4px;}
  .row-num{font-size:18px;}
  .row-meta{grid-column:auto;}
  .cross a{flex-wrap:wrap;gap:8px;padding:18px 4px;}
  .cross .c-desc{margin-left:0;text-align:left;flex:1 1 100%;}
  .cross .c-arrow{display:none;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .cta-actions .btn{width:100%;}
  .footer{padding:48px 0 84px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{margin-top:32px;font-size:12px;}
  .float-cta{
    left:0;right:0;bottom:0;
    border-radius:0;
    padding:0 16px;
    height:70px;
    display:flex;justify-content:space-between;
    opacity:1;pointer-events:auto;transform:none;
  }
  .fc-text{display:block;font-size:14px;font-weight:500;color:rgba(255,255,255,.85);}
  .fc-btn{display:inline-flex;align-items:center;gap:6px;font-weight:700;}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{transition:none !important;animation:none !important;}
}