/* roulang page: index */
:root{
  --c-primary:#1F5FA9;
  --c-primary-600:#17497F;
  --c-primary-050:#EDF4FC;
  --c-accent:#12A594;
  --c-accent-050:#E6F6F4;
  --c-warm:#E08A2E;
  --ink:#10233C;
  --ink-2:#55677E;
  --ink-3:#93A2B3;
  --line:#E3EAF2;
  --bg:#FFFFFF;
  --bg-alt:#F5F8FC;
  --bg-dark:#0E2A4A;
  --success:#12A594;
  --error:#D2453C;
  --warn:#D08A1E;
  --r-card:14px;
  --r-cta:20px;
  --r-btn:10px;
  --r-img:12px;
  --sh-1:0 6px 20px -8px rgba(15,36,64,.12);
  --sh-2:0 14px 32px -10px rgba(15,36,64,.18);
  --sh-nav:0 1px 0 var(--line);
  --t:180ms cubic-bezier(.2,.7,.3,1);
  --maxw:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color var(--t)}
button,input{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
svg{display:block}
:focus-visible{outline:3px solid rgba(31,95,169,.25);outline-offset:2px;border-radius:8px}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--bg-dark);color:#D8E6F5;font-size:13px;line-height:1.6}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:34px}
.topbar-left{display:flex;align-items:center;gap:12px;min-width:0}
.topbar-domain{font-weight:600;letter-spacing:.02em;color:#fff;font-variant-numeric:tabular-nums}
.topbar-sep{width:1px;height:12px;background:rgba(216,230,245,.35)}
.topbar-right a{color:#D8E6F5;border-bottom:1px solid rgba(216,230,245,.35);padding-bottom:1px}
.topbar-right a:hover{color:#fff;border-bottom-color:#fff}

/* ---------- 主导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;box-shadow:var(--sh-nav);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:19px;letter-spacing:-.01em;color:var(--ink)}
.logo-mark{width:36px;height:36px;border-radius:10px;background:var(--c-primary);color:#fff;display:grid;place-items:center;flex:0 0 36px}
.logo-mark svg{width:20px;height:20px}
.logo-text{white-space:nowrap}
.nav-list{display:flex;align-items:center;gap:28px}
.nav-link{position:relative;display:inline-block;padding:24px 0;font-size:15px;font-weight:500;color:var(--ink-2)}
.nav-link::after{content:"";position:absolute;left:50%;bottom:14px;height:2px;width:0;background:var(--c-primary);transform:translateX(-50%);transition:width var(--t)}
.nav-link:hover{color:var(--c-primary)}
.nav-link:hover::after{width:100%}
.nav-link.active{color:var(--c-primary);font-weight:600}
.nav-link.active::after{width:100%}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;align-items:center;justify-content:center;transition:border-color var(--t),background var(--t)}
.nav-toggle:hover{border-color:var(--c-primary);background:var(--c-primary-050)}
.nav-toggle svg{width:20px;height:20px;stroke:var(--ink)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform var(--t),background var(--t),color var(--t),border-color var(--t),box-shadow var(--t);
  white-space:nowrap;
}
.btn svg{width:17px;height:17px}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:none}
.btn-primary{background:var(--c-primary);color:#fff}
.btn-primary:hover{background:var(--c-primary-600)}
.btn-outline{background:#fff;color:var(--c-primary);border-color:rgba(31,95,169,.38)}
.btn-outline:hover{border-color:var(--c-primary);background:var(--c-primary-050)}
.btn-light{background:#fff;color:var(--c-primary)}
.btn-light:hover{background:var(--c-primary-050)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.55;pointer-events:none}

/* ---------- 移动端抽屉 ---------- */
.drawer{
  position:fixed;inset:0;z-index:90;background:#fff;
  display:flex;flex-direction:column;padding:24px;
  transform:translateX(100%);transition:transform 260ms cubic-bezier(.2,.7,.3,1);
  overflow-y:auto;
}
.drawer.open{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:20px;border-bottom:1px solid var(--line)}
.drawer-close{width:42px;height:42px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;display:grid;place-items:center}
.drawer-close:hover{border-color:var(--c-primary);background:var(--c-primary-050)}
.drawer-close svg{width:18px;height:18px}
.drawer-list{display:grid;gap:16px;padding:24px 0;flex:1}
.drawer-list a{display:block;padding:14px 16px;border-radius:12px;font-size:16px;font-weight:500;color:var(--ink-2);background:var(--bg-alt)}
.drawer-list a:hover{background:var(--c-primary-050);color:var(--c-primary)}
.drawer-list a.active{background:var(--c-primary-050);color:var(--c-primary);font-weight:600}
.drawer-foot{padding-top:16px;border-top:1px solid var(--line)}
body.drawer-open{overflow:hidden}

/* ---------- 通用区块 ---------- */
.section{padding:96px 0}
.section-alt{background:var(--bg-alt)}
.section-head{max-width:760px;margin-bottom:48px}
.eyebrow{display:inline-block;font-size:13px;font-weight:600;color:var(--c-accent);background:var(--c-accent-050);padding:5px 14px;border-radius:999px;margin-bottom:16px}
.section h2{font-size:30px;line-height:1.3;font-weight:700;letter-spacing:-.01em;margin-bottom:14px}
.section .lead{color:var(--ink-2);font-size:16px}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:40px}
.section-head-row .section-head{margin-bottom:0}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-weight:600;font-size:15px}
.text-link svg{width:16px;height:16px}
.text-link:hover{text-decoration:underline;text-underline-offset:3px}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;background:var(--bg-alt)}
.hero-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center right;background-repeat:no-repeat}
.hero-veil{position:absolute;inset:0;background:linear-gradient(90deg,rgba(255,255,255,.97) 0%,rgba(240,246,253,.95) 42%,rgba(240,246,253,.66) 72%,rgba(240,246,253,.30) 100%)}
.hero-pattern{position:absolute;right:-40px;top:-30px;width:420px;height:280px;opacity:.05;pointer-events:none}
.hero-inner{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;padding-top:76px;padding-bottom:56px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);color:var(--c-primary);font-size:13px;font-weight:600;padding:6px 14px;border-radius:999px;box-shadow:var(--sh-1)}
.hero-badge svg{width:14px;height:14px;stroke:var(--c-accent)}
.hero h1{font-size:40px;line-height:1.25;font-weight:700;letter-spacing:-.01em;margin:22px 0 18px;max-width:16em}
.hero-sub{font-size:17px;color:var(--ink-2);max-width:32em;margin-bottom:30px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-note{margin-top:18px;font-size:13px;color:var(--ink-3)}
.hero-panel{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-2);padding:24px}
.panel-top{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--ink-2);margin-bottom:16px}
.panel-dot{width:8px;height:8px;border-radius:999px;background:var(--success);box-shadow:0 0 0 4px rgba(18,165,148,.14)}
.panel-thumb{border-radius:var(--r-img);overflow:hidden;background:var(--c-primary-050);aspect-ratio:16/9}
.panel-thumb img{width:100%;height:100%;object-fit:cover}
.panel-list{margin-top:8px}
.panel-list li{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px solid var(--line);font-size:14px;color:var(--ink-2)}
.panel-list li:last-child{border-bottom:0}
.panel-list em{font-style:normal;color:var(--c-accent);font-weight:600;font-variant-numeric:tabular-nums}
.hero-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;padding:28px 0 56px;margin-top:8px;border-top:1px solid rgba(31,95,169,.14)}
.metric-num{font-size:28px;font-weight:700;line-height:1.25;color:var(--c-primary);font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.metric-label{font-size:13px;color:var(--ink-3)}

/* ---------- 卡片通用 ---------- */
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:24px;box-shadow:var(--sh-1);transition:transform var(--t),box-shadow var(--t),border-color var(--t)}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(31,95,169,.3)}
.icon-badge{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;background:var(--c-accent-050);color:var(--c-accent);margin-bottom:18px}
.icon-badge svg{width:22px;height:22px;stroke:currentColor}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card h3{font-size:18px;line-height:1.45;font-weight:600;margin-bottom:10px}
.card p{font-size:14px;color:var(--ink-2);line-height:1.75}

/* ---------- 流程 ---------- */
.flow{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;padding:52px 0;border-top:1px solid var(--line)}
.flow:first-of-type{border-top:0;padding-top:8px}
.flow.alt{grid-template-columns:5fr 7fr}
.flow.alt .flow-media{order:-1}
.flow-num{font-size:54px;line-height:1;font-weight:700;color:rgba(31,95,169,.18);font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.flow h3{font-size:22px;line-height:1.4;font-weight:600;margin:12px 0 14px}
.flow p{color:var(--ink-2)}
.flow-media{border-radius:var(--r-img);overflow:hidden;background:var(--c-primary-050);box-shadow:var(--sh-1)}
.flow-media img{width:100%;height:100%;aspect-ratio:4/3;object-fit:cover}
.flow-points{margin-top:18px;display:grid;gap:10px}
.flow-points li{position:relative;padding-left:20px;font-size:14px;color:var(--ink-2)}
.flow-points li::before{content:"";position:absolute;left:0;top:.65em;width:8px;height:8px;border-radius:999px;background:var(--c-accent)}

/* ---------- 深色成果区 ---------- */
.section-dark{background:var(--bg-dark);color:#fff}
.section-dark .eyebrow{background:rgba(18,165,148,.2);color:#7FE3D6}
.section-dark h2{color:#fff}
.section-dark .lead{color:#B9CBDF}
.band{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:34px 0;border-top:1px solid rgba(255,255,255,.14);border-bottom:1px solid rgba(255,255,255,.14);margin-bottom:48px}
.band-num{font-size:32px;font-weight:700;line-height:1.2;color:#7FE3D6;font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.band-label{font-size:13px;color:#B9CBDF;margin-top:6px}
.case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.case{display:grid;grid-template-columns:5fr 7fr;gap:22px;align-items:center;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:var(--r-card);padding:22px;transition:background var(--t),transform var(--t),border-color var(--t)}
.case:hover{background:rgba(255,255,255,.1);border-color:rgba(127,227,214,.45);transform:translateY(-2px)}
.case-thumb{border-radius:var(--r-img);overflow:hidden;background:rgba(255,255,255,.08);aspect-ratio:4/3}
.case-thumb img{width:100%;height:100%;object-fit:cover}
.case h3{font-size:17px;line-height:1.5;font-weight:600;margin-bottom:10px;color:#fff}
.case p{font-size:14px;line-height:1.75;color:#B9CBDF}

/* ---------- 客户反馈 ---------- */
.quote-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:26px;box-shadow:var(--sh-1);display:flex;flex-direction:column;gap:16px;transition:transform var(--t),box-shadow var(--t),border-color var(--t)}
.quote-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(31,95,169,.3)}
.quote-text{font-size:16px;line-height:1.8;color:var(--ink)}
.quote-person{display:flex;align-items:center;gap:12px;margin-top:auto;padding-top:16px;border-top:1px solid var(--line)}
.avatar{width:48px;height:48px;border-radius:999px;background:var(--c-primary-050);color:var(--c-primary);display:grid;place-items:center;font-weight:700;font-size:16px;flex:0 0 48px}
.quote-name{font-size:14px;font-weight:600;line-height:1.5}
.quote-role{font-size:13px;color:var(--ink-3);line-height:1.5}
.stars{display:flex;gap:4px}
.stars svg{width:16px;height:16px;fill:var(--c-warm);stroke:none}

/* ---------- 内容卡片 ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);transition:transform var(--t),box-shadow var(--t),border-color var(--t)}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(31,95,169,.3)}
.post-cover-wrap{aspect-ratio:16/9;background:var(--c-primary-050);overflow:hidden}
.post-cover{width:100%;height:100%;object-fit:cover}
.post-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.badge{display:inline-flex;align-items:center;align-self:flex-start;font-size:12px;font-weight:600;color:var(--c-primary);background:var(--c-primary-050);border-radius:999px;padding:4px 12px}
.post-title{font-size:17px;line-height:1.5;font-weight:600;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-excerpt{font-size:14px;line-height:1.75;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--ink-3);font-variant-numeric:tabular-nums}
.more{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-weight:600}
.more svg{width:15px;height:15px}
.post-card:hover .more svg{transform:translateX(2px)}
.more svg{transition:transform var(--t)}
.empty-state{border:1px dashed #C6D6E8;border-radius:var(--r-card);padding:56px 24px;text-align:center;background:#fff}
.empty-state svg{width:38px;height:38px;stroke:var(--c-primary);opacity:.6;margin:0 auto 16px}
.empty-state p{color:var(--ink-2);font-size:15px;margin-bottom:20px}

/* ---------- 搜索 ---------- */
.search-inline{position:relative;display:flex;align-items:center;min-width:280px}
.search-inline svg{position:absolute;left:14px;width:17px;height:17px;stroke:var(--ink-3)}
.search-inline input{width:100%;height:48px;border:1px solid var(--line);border-radius:var(--r-btn);padding:0 16px 0 42px;background:#fff;font-size:14px;transition:border-color var(--t),box-shadow var(--t)}
.search-inline input::placeholder{color:var(--ink-3)}
.search-inline input:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(31,95,169,.14)}

/* ---------- FAQ ---------- */
.faq-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1);padding:6px 26px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:last-child{border-bottom:0}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:22px 0;transition:color var(--t)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary h3{font-size:17px;line-height:1.55;font-weight:600}
.faq-item summary:hover h3{color:var(--c-primary)}
.faq-icon{position:relative;flex:0 0 22px;width:22px;height:22px;border-radius:999px;background:var(--c-primary-050);transition:background var(--t)}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--c-primary);border-radius:2px;transition:transform var(--t),opacity var(--t)}
.faq-icon::before{left:6px;top:10px;width:10px;height:2px}
.faq-icon::after{left:10px;top:6px;width:2px;height:10px}
.faq-item[open] .faq-icon{background:var(--c-accent-050)}
.faq-item[open] .faq-icon::before{background:var(--c-accent)}
.faq-item[open] .faq-icon::after{opacity:0}
.faq-item[open] summary h3{color:var(--c-primary)}
.faq-body{padding:0 0 24px 18px;border-left:4px solid var(--c-accent);font-size:15px;line-height:1.8;color:var(--ink-2);margin-left:2px}

/* ---------- CTA ---------- */
.cta-panel{position:relative;overflow:hidden;background:var(--c-primary);border-radius:var(--r-cta);padding:64px 40px;text-align:center;color:#fff}
.cta-panel::after{content:"";position:absolute;right:-60px;bottom:-80px;width:280px;height:280px;border-radius:999px;background:rgba(255,255,255,.07)}
.cta-panel h2{font-size:30px;line-height:1.3;font-weight:700;letter-spacing:-.01em;margin-bottom:14px;color:#fff;position:relative}
.cta-panel p{max-width:640px;margin:0 auto 32px;color:#DCE9F7;position:relative}
.cta-panel .btn{position:relative}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-dark);color:#B9CBDF;font-size:14px;padding-top:72px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1.1fr 1.2fr;gap:40px}
.footer-brand .logo{color:#fff;margin-bottom:16px}
.footer-brand .logo-mark{background:rgba(255,255,255,.14)}
.footer-desc{font-size:14px;line-height:1.8;color:#9FB6CF;max-width:26em}
.footer-title{color:#fff;font-size:15px;font-weight:600;margin-bottom:18px}
.footer-list{display:grid;gap:11px}
.footer-list a{color:#B9CBDF}
.footer-list a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.footer-contact li{display:flex;gap:10px;color:#B9CBDF;line-height:1.75}
.footer-contact svg{width:16px;height:16px;stroke:#7FE3D6;flex:0 0 16px;margin-top:5px}
.footer-bottom{margin-top:56px;border-top:1px solid rgba(255,255,255,.14);padding:22px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:#8FA8C4;font-variant-numeric:tabular-nums}

/* ---------- 滚动淡入 ---------- */
.js .reveal{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease}
.js .reveal.is-visible{opacity:1;transform:none}

/* ---------- 图片缺失占位 ---------- */
.img-missing{background:var(--c-primary-050);display:grid;place-items:center;min-height:140px;position:relative}
.img-missing::after{
  content:"";width:36px;height:36px;opacity:.5;
  background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231F5FA9' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='3' y='4' width='18' height='16' rx='2'/%3E%3Cpath d='M3 15l5-4 4 3 3-2 6 5'/%3E%3C/svg%3E") center/contain no-repeat;
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .post-grid{grid-template-columns:repeat(2,1fr)}
  .band{grid-template-columns:repeat(2,1fr);row-gap:32px}
  .hero h1{font-size:36px}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .nav-list{display:none}
  .nav-actions .btn{display:none}
  .nav-toggle{display:inline-flex}
  .hero-inner{grid-template-columns:1fr;gap:32px;padding-top:56px;padding-bottom:40px}
  .hero-veil{background:linear-gradient(180deg,rgba(255,255,255,.97) 0%,rgba(240,246,253,.92) 60%,rgba(240,246,253,.72) 100%)}
  .flow,.flow.alt{grid-template-columns:1fr;gap:24px}
  .flow.alt .flow-media{order:0}
  .case-grid{grid-template-columns:1fr}
  .quote-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px}
}
@media (max-width:767px){
  body{font-size:15px}
  .section{padding:64px 0}
  .container{padding:0 18px}
  .topbar-left{display:none}
  .topbar-inner{justify-content:flex-end;height:34px}
  .section h2{font-size:22px}
  .hero h1{font-size:26px;line-height:1.35;margin:18px 0 14px}
  .hero-sub{font-size:16px}
  .hero-metrics{grid-template-columns:1fr;gap:18px;padding-bottom:44px}
  .grid-4,.grid-3,.grid-2,.post-grid,.band{grid-template-columns:1fr}
  .card,.quote-card,.post-card{box-shadow:0 4px 14px -8px rgba(15,36,64,.1)}
  .cta-panel{padding:40px 24px;border-radius:16px}
  .cta-panel h2{font-size:22px}
  .cta-panel .btn{width:100%}
  .hero-actions .btn{width:100%}
  .faq-card{padding:4px 18px}
  .faq-body{padding-left:14px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .search-inline{min-width:0;width:100%}
}
@media (max-width:479px){
  .hero-pattern{display:none}
  .flow-num{font-size:42px}
  .band-num{font-size:26px}
  .btn{width:100%}
  .nav-toggle,.drawer-close{width:44px}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;scroll-behavior:auto !important}
  .js .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --c-primary:#1F5FA9;
  --c-primary-600:#17497F;
  --c-primary-050:#EDF4FC;
  --c-accent:#12A594;
  --c-accent-050:#E6F6F4;
  --c-warm:#E08A2E;
  --c-ink:#10233C;
  --c-ink-2:#55677E;
  --c-ink-3:#93A2B3;
  --c-line:#E3EAF2;
  --c-bg:#FFFFFF;
  --c-bg-soft:#F5F8FC;
  --c-dark:#0E2A4A;
  --c-danger:#D2453C;
  --r-card:14px;
  --r-cta:20px;
  --r-btn:10px;
  --r-img:12px;
  --sh-1:0 6px 20px -8px rgba(15,36,64,.12);
  --sh-2:0 14px 32px -10px rgba(15,36,64,.18);
  --sh-nav:0 1px 0 #E3EAF2;
  --ease:cubic-bezier(.2,.7,.3,1);
  --t:180ms var(--ease);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--c-ink);
  background:var(--c-bg);
  overflow-x:hidden;
}
img,svg{display:block;max-width:100%}
img{height:auto}
a{color:inherit;text-decoration:none;transition:color var(--t)}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;color:var(--c-ink)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
time,.num{font-variant-numeric:tabular-nums}
:focus-visible{outline:3px solid rgba(31,95,169,.28);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--c-dark);color:#D8E6F5;font-size:13px;line-height:1.6}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;min-height:34px;gap:16px}
.topbar-left{display:flex;align-items:center;gap:10px;color:#9FB8D4}
.topbar-left strong{color:#D8E6F5;font-weight:600}
.topbar-right{display:flex;align-items:center;gap:8px}
.topbar-right a{color:#D8E6F5;border-bottom:1px solid rgba(216,230,245,.4);padding-bottom:1px}
.topbar-right a:hover{color:#fff;border-bottom-color:#fff}

/* ---------- 主导航 ---------- */
.nav-bar{position:sticky;top:0;z-index:60;background:#fff;box-shadow:var(--sh-nav)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;min-height:72px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:19px;letter-spacing:-.01em;color:var(--c-ink)}
.logo-mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:10px;
  background:var(--c-primary-050);color:var(--c-primary);
  display:inline-flex;align-items:center;justify-content:center;
}
.logo-mark svg{width:19px;height:19px;stroke:currentColor}
.logo-text{white-space:nowrap}
.nav{display:flex;align-items:center}
.nav-list{display:flex;align-items:center;gap:28px}
.nav-link{
  position:relative;display:inline-block;padding:6px 0;font-size:15px;color:var(--c-ink-2);
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:0;height:2px;width:0;
  background:var(--c-primary);border-radius:2px;transform:translateX(-50%);
  transition:width var(--t);
}
.nav-link:hover{color:var(--c-primary)}
.nav-link:hover::after{width:100%}
.nav-link.active{color:var(--c-primary);font-weight:600}
.nav-link.active::after{width:100%}
.nav-actions{display:flex;align-items:center;gap:14px}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--c-line);border-radius:var(--r-btn);
  background:#fff;cursor:pointer;padding:0;align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-ink);margin:3px auto;border-radius:2px;transition:transform var(--t),opacity var(--t)}
.nav-toggle:hover{border-color:var(--c-primary);color:var(--c-primary)}
body.drawer-open{overflow:hidden}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 6px 16px -8px rgba(31,95,169,.6)}
.btn-primary:hover{background:var(--c-primary-600);transform:translateY(-1px)}
.btn-primary:active{background:var(--c-primary-600);transform:none}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:rgba(31,95,169,.35)}
.btn-ghost:hover{background:var(--c-primary-050);border-color:var(--c-primary);transform:translateY(-1px)}
.btn-ghost:active{transform:none}
.btn-white{background:#fff;color:var(--c-primary)}
.btn-white:hover{background:var(--c-primary-050);transform:translateY(-1px)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-block{width:100%}
.btn[disabled]{opacity:.5;pointer-events:none}

/* ---------- 面包屑 ---------- */
.crumb-wrap{padding:26px 0 0}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-ink-3);line-height:1.6}
.breadcrumb a{color:var(--c-ink-2)}
.breadcrumb a:hover{color:var(--c-primary);text-decoration:underline;text-underline-offset:3px}
.breadcrumb .sep{color:#C3CFDC}
.breadcrumb .current{color:var(--c-ink-2);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 文章头部 ---------- */
.article-head{padding:18px 0 0}
.article-head-inner{max-width:860px}
.article-title{font-size:36px;line-height:1.3;margin:14px 0 0}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:18px;font-size:14px;color:var(--c-ink-3)}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  background:var(--c-primary-050);color:var(--c-primary);font-size:13px;font-weight:600;
}
.badge-accent{background:var(--c-accent-050);color:#0C7C70}
.meta-dot{width:4px;height:4px;border-radius:50%;background:#CBD6E2}
.article-cover{margin:26px 0 0;border-radius:var(--r-img);overflow:hidden;background:var(--c-primary-050)}
.article-cover img{width:100%;aspect-ratio:16/6;object-fit:cover}

/* ---------- 文章布局 ---------- */
.article-section{padding:36px 0 96px}
.article-container{max-width:1080px;margin:0 auto;padding:0 24px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:44px;align-items:start}
.article-main{min-width:0}

.toc-side{position:sticky;top:96px;border:1px solid var(--c-line);border-radius:var(--r-card);padding:20px;background:#fff;box-shadow:var(--sh-1)}
.toc-title{font-size:15px;font-weight:700;margin-bottom:12px;color:var(--c-ink)}
.toc-list li{margin-bottom:8px;font-size:14px;line-height:1.7}
.toc-list a{color:var(--c-ink-2);display:block;border-left:2px solid transparent;padding-left:10px}
.toc-list a:hover{color:var(--c-primary);border-left-color:var(--c-primary)}
.toc-list .is-active a{color:var(--c-primary);font-weight:600;border-left-color:var(--c-primary)}
.toc-h3 a{padding-left:22px;color:var(--c-ink-3);font-size:13px}
.toc-contact{margin-top:18px;padding-top:16px;border-top:1px solid var(--c-line);font-size:13px;color:var(--c-ink-3);line-height:1.7}
.toc-contact strong{display:block;color:var(--c-ink);font-size:14px;margin-bottom:6px}

.toc-collapse{display:none;border:1px solid var(--c-line);border-radius:var(--r-card);padding:14px 18px;margin-bottom:26px;background:var(--c-bg-soft)}
.toc-collapse summary{cursor:pointer;font-weight:600;font-size:15px;list-style:none;display:flex;justify-content:space-between;align-items:center;color:var(--c-primary)}
.toc-collapse summary::-webkit-details-marker{display:none}
.toc-collapse[open] summary{margin-bottom:12px}

/* ---------- 正文排版 ---------- */
.article-body{font-size:17px;line-height:1.9;color:#1C3049}
.article-body>*:first-child{margin-top:0}
.article-body p{margin:0 0 20px}
.article-body h2{
  font-size:24px;line-height:1.45;margin:44px 0 16px;padding-left:14px;
  border-left:4px solid var(--c-primary);scroll-margin-top:110px;
}
.article-body h3{font-size:19px;line-height:1.5;margin:32px 0 12px;scroll-margin-top:110px}
.article-body h4{font-size:17px;margin:24px 0 10px}
.article-body ul,.article-body ol{padding-left:1.4em;margin:0 0 20px}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin-bottom:8px}
.article-body li::marker{color:var(--c-accent)}
.article-body blockquote{
  margin:24px 0;padding:18px 22px;background:var(--c-primary-050);
  border-left:4px solid var(--c-primary);border-radius:0 var(--r-img) var(--r-img) 0;color:var(--c-ink-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-img);margin:24px auto}
.article-body figure{margin:24px 0}
.article-body figcaption{font-size:13px;color:var(--c-ink-3);text-align:center;line-height:1.6;margin-top:8px}
.article-body a{color:var(--c-primary);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--c-primary-600)}
.article-body code{background:var(--c-bg-soft);padding:2px 6px;border-radius:6px;font-size:15px}
.article-body pre{background:var(--c-dark);color:#D8E6F5;padding:18px;border-radius:var(--r-img);overflow:auto;font-size:14px;line-height:1.7}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;line-height:1.7}
.article-body th{background:var(--c-bg-soft);border:1px solid var(--c-line);padding:12px 14px;text-align:left;font-weight:600}
.article-body td{border:1px solid var(--c-line);padding:12px 14px;color:var(--c-ink-2)}
.article-body hr{border:0;border-top:1px solid var(--c-line);margin:40px 0}

/* ---------- 标签 / 来源 ---------- */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:44px;padding-top:26px;border-top:1px solid var(--c-line)}
.tag{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:999px;
  border:1px solid var(--c-line);background:#fff;font-size:13px;color:var(--c-ink-2);
  transition:border-color var(--t),color var(--t),background var(--t);
}
.tag:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-050)}
.source-box{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  margin-top:24px;padding:20px 24px;border:1px solid var(--c-line);border-radius:var(--r-card);background:var(--c-bg-soft);
}
.source-box .who{font-size:15px;font-weight:600;color:var(--c-ink)}
.source-box .desc{font-size:13px;color:var(--c-ink-3);line-height:1.7;margin-top:4px}
.back-cat{margin-top:32px}

/* ---------- 相关推荐 ---------- */
.related{padding:72px 0;background:var(--c-bg-soft);border-top:1px solid var(--c-line)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}
.section-head h2{font-size:26px;line-height:1.35}
.section-head p{font-size:14px;color:var(--c-ink-3);margin-top:8px;line-height:1.7}
.link-more{font-size:14px;color:var(--c-primary);font-weight:600;display:inline-flex;align-items:center;gap:6px}
.link-more:hover{text-decoration:underline;text-underline-offset:3px}
.link-more svg{width:14px;height:14px;stroke:currentColor}
.card-grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--c-line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(31,95,169,.3)}
.card-media{position:relative;aspect-ratio:16/9;background:var(--c-primary-050);overflow:hidden}
.card-media img{width:100%;height:100%;object-fit:cover}
.card-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1}
.card-body h3{font-size:17px;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-body p{font-size:14px;color:var(--c-ink-2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{display:flex;align-items:center;justify-content:space-between;margin-top:auto;font-size:13px;color:var(--c-ink-3)}
.card-foot .arrow{color:var(--c-primary);font-weight:600;display:inline-flex;align-items:center;gap:4px}

/* ---------- 空状态 ---------- */
.empty-state{
  border:1px dashed #BFD0E2;border-radius:var(--r-card);background:var(--c-bg-soft);
  padding:56px 24px;text-align:center;color:var(--c-ink-2);
}
.empty-state svg{width:44px;height:44px;stroke:var(--c-primary);margin:0 auto 16px}
.empty-state h2{font-size:20px;margin-bottom:10px}
.empty-state p{font-size:15px;color:var(--c-ink-3);margin-bottom:22px}

/* ---------- CTA ---------- */
.cta-section{padding:0 0 96px}
.cta-board{
  background:var(--c-primary);border-radius:var(--r-cta);padding:64px 40px;color:#fff;text-align:center;
}
.cta-board h2{color:#fff;font-size:30px;line-height:1.35;margin-bottom:14px}
.cta-board p{color:rgba(255,255,255,.86);font-size:16px;line-height:1.8;max-width:620px;margin:0 auto 30px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-dark);color:#B9CBDF;padding:72px 0 0;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.footer-brand .logo{color:#fff;margin-bottom:16px}
.footer-brand .logo-mark{background:rgba(255,255,255,.08);color:#8FC0F0}
.footer-desc{font-size:14px;line-height:1.8;color:#9FB8D4;max-width:320px}
.footer-title{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600;letter-spacing:0}
.footer-list li{margin-bottom:10px}
.footer-list a{color:#B9CBDF}
.footer-list a:hover{color:#fff}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;margin-bottom:12px;line-height:1.7}
.footer-contact svg{width:18px;height:18px;flex:0 0 18px;margin-top:4px;stroke:#7FA6CE;fill:none}
.footer-bottom{
  border-top:1px solid rgba(185,203,223,.18);padding:22px 0 26px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:#8FA8C4;
}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .article-title{font-size:32px}
  .card-grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:1023px){
  .nav{position:fixed;inset:0;background:#fff;z-index:70;display:none;flex-direction:column;align-items:stretch;padding:88px 24px 120px;overflow-y:auto}
  body.drawer-open .nav{display:flex}
  .nav-list{flex-direction:column;align-items:stretch;gap:16px}
  .nav-link{font-size:17px;padding:12px 0;border-bottom:1px solid var(--c-line)}
  .nav-link::after{display:none}
  .nav-link.active{color:var(--c-primary)}
  .nav-toggle{display:inline-flex;position:relative;z-index:80}
  .drawer-cta{position:fixed;left:24px;right:24px;bottom:24px;z-index:80;display:none}
  body.drawer-open .drawer-cta{display:block}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0}
  .toc-side{display:none}
  .toc-collapse{display:block}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
  .cta-board{padding:52px 32px}
}
@media (max-width:767px){
  .container,.article-container{padding:0 16px}
  .topbar-left{display:none}
  .topbar-inner{justify-content:flex-end}
  .article-title{font-size:26px;line-height:1.35}
  .article-head{padding:12px 0 0}
  .article-section{padding:28px 0 64px}
  .article-body{font-size:17px}
  .article-body h2{font-size:21px;margin-top:36px}
  .article-body h3{font-size:18px}
  .article-cover img{aspect-ratio:16/9}
  .related{padding:56px 0}
  .card-grid-3{grid-template-columns:minmax(0,1fr)}
  .cta-section{padding:0 0 64px}
  .cta-board{padding:40px 24px}
  .cta-board h2{font-size:22px}
  .section-head{flex-direction:column;align-items:flex-start}
  .source-box{padding:18px}
}
@media (max-width:519px){
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .btn-block-sm{width:100%}
  .breadcrumb .current{max-width:210px}
}

/* roulang page: category1 */
:root{
  --c-primary:#1F5FA9;
  --c-primary-600:#17497F;
  --c-primary-050:#EDF4FC;
  --c-accent:#12A594;
  --c-accent-050:#E6F6F4;
  --c-warm:#E08A2E;
  --c-text:#10233C;
  --c-text-2:#55677E;
  --c-text-3:#93A2B3;
  --c-line:#E3EAF2;
  --c-bg:#FFFFFF;
  --c-bg-alt:#F5F8FC;
  --c-dark:#0E2A4A;
  --c-dark-text:#D8E6F5;
  --c-danger:#D2453C;
  --r-card:14px;
  --r-panel:20px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --sh-1:0 6px 20px -8px rgba(15,36,64,.12);
  --sh-2:0 14px 32px -10px rgba(15,36,64,.18);
  --sh-nav:0 1px 0 #E3EAF2;
  --gap:24px;
  --ease:180ms cubic-bezier(.2,.7,.3,1);
  --font:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  color:var(--c-text);
  background:var(--c-bg);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:inherit;text-decoration:none;}
a:hover{color:var(--c-primary);}
button,input,select,textarea{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:650;letter-spacing:-.01em;color:var(--c-text);}
h1{font-size:40px;line-height:1.25;}
h2{font-size:30px;line-height:1.3;}
h3{font-size:22px;line-height:1.4;}
h4{font-size:17px;line-height:1.5;}
p{margin:0;}
svg{display:block;}
:focus-visible{outline:3px solid rgba(31,95,169,.28);outline-offset:2px;border-radius:6px;}

/* ============ 容器与板块 ============ */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section--alt{background:var(--c-bg-alt);}
.section--tight{padding:72px 0;}
.section-head{max-width:720px;margin-bottom:40px;}
.section-head h2{margin-bottom:14px;}
.section-head p{color:var(--c-text-2);font-size:16px;}
.section-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;line-height:1.6;color:var(--c-accent);
  background:var(--c-accent-050);border-radius:var(--r-pill);
  padding:5px 14px;margin-bottom:16px;font-weight:600;
}
.eyebrow svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:1.8;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:background var(--ease),color var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease);
  white-space:nowrap;
}
.btn svg{width:17px;height:17px;stroke:currentColor;fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;}
.btn--primary{background:var(--c-primary);color:#fff;box-shadow:0 6px 18px -10px rgba(31,95,169,.7);}
.btn--primary:hover{background:var(--c-primary-600);color:#fff;transform:translateY(-1px);}
.btn--primary:active{transform:none;}
.btn--ghost{background:#fff;color:var(--c-primary);border-color:#C6D9EE;}
.btn--ghost:hover{border-color:var(--c-primary);color:var(--c-primary-600);transform:translateY(-1px);}
.btn--ghost:active{transform:none;}
.btn--light{background:#fff;color:var(--c-primary);}
.btn--light:hover{background:#EAF2FB;color:var(--c-primary-600);transform:translateY(-1px);}
.btn--sm{height:40px;padding:0 18px;font-size:14px;}
.btn--block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.5;pointer-events:none;}

/* ============ 顶部信息条 ============ */
.topbar{background:var(--c-dark);color:var(--c-dark-text);font-size:13px;line-height:1.6;}
.topbar .container{display:flex;align-items:center;justify-content:space-between;min-height:34px;gap:16px;}
.topbar-left{display:flex;align-items:center;gap:10px;}
.topbar-dot{width:6px;height:6px;border-radius:50%;background:var(--c-accent);}
.topbar-right a{color:var(--c-dark-text);display:inline-flex;align-items:center;gap:6px;}
.topbar-right a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}
.topbar-right svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:1.8;}

/* ============ 主导航 ============ */
.site-header{position:sticky;top:0;z-index:60;background:#fff;box-shadow:var(--sh-nav);}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;min-height:72px;gap:24px;}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:19px;letter-spacing:-.01em;color:var(--c-text);}
.logo:hover{color:var(--c-text);}
.logo-mark{
  width:36px;height:36px;border-radius:11px;background:var(--c-primary);
  display:inline-flex;align-items:center;justify-content:center;color:#fff;flex:0 0 auto;
}
.logo-mark svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.logo-text{white-space:nowrap;}
.nav{display:flex;align-items:center;}
.nav-list{display:flex;align-items:center;gap:28px;}
.nav-link{
  position:relative;display:inline-block;padding:8px 0;font-size:15px;color:var(--c-text-2);font-weight:500;
  transition:color var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:50%;right:50%;bottom:0;height:2px;border-radius:2px;
  background:var(--c-primary);transition:left var(--ease),right var(--ease);
}
.nav-link:hover{color:var(--c-primary);}
.nav-link:hover::after{left:0;right:0;}
.nav-link.active{color:var(--c-primary);font-weight:650;}
.nav-link.active::after{left:0;right:0;}
.nav-actions{display:flex;align-items:center;gap:14px;}
.burger{
  display:none;width:44px;height:44px;border:1px solid var(--c-line);border-radius:var(--r-btn);
  background:#fff;cursor:pointer;align-items:center;justify-content:center;padding:0;
  transition:border-color var(--ease),background var(--ease);
}
.burger:hover{border-color:var(--c-primary);background:var(--c-primary-050);}
.burger span{display:block;width:18px;height:2px;background:var(--c-text);border-radius:2px;position:relative;}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-text);border-radius:2px;
}
.burger span::before{top:-6px;}
.burger span::after{top:6px;}
.drawer{
  position:fixed;inset:0;background:#fff;z-index:80;display:none;flex-direction:column;
  padding:20px 24px 24px;overflow-y:auto;
}
.drawer.is-open{display:flex;}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;}
.drawer-close{width:44px;height:44px;border:1px solid var(--c-line);border-radius:var(--r-btn);background:#fff;cursor:pointer;}
.drawer-close svg{width:18px;height:18px;margin:0 auto;stroke:var(--c-text);fill:none;stroke-width:1.9;stroke-linecap:round;}
.drawer-list{display:flex;flex-direction:column;gap:16px;}
.drawer-link{
  display:block;padding:14px 16px;border:1px solid var(--c-line);border-radius:var(--r-btn);
  font-size:16px;font-weight:600;color:var(--c-text);transition:background var(--ease),border-color var(--ease);
}
.drawer-link.active{color:var(--c-primary);border-color:#C6D9EE;background:var(--c-primary-050);}
.drawer-link:hover{background:var(--c-primary-050);border-color:#C6D9EE;}
.drawer-foot{margin-top:auto;padding-top:24px;}

/* ============ 面包屑 ============ */
.crumbs{padding:22px 0 0;}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--c-text-3);}
.crumbs li{display:flex;align-items:center;gap:8px;}
.crumbs li+li::before{content:"/";color:#CBD6E3;}
.crumbs a{color:var(--c-text-2);}
.crumbs a:hover{color:var(--c-primary);text-decoration:underline;text-underline-offset:3px;}
.crumbs [aria-current]{color:var(--c-text);font-weight:600;}

/* ============ Hero ============ */
.hero{
  position:relative;
  padding:40px 0 72px;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center right;background-repeat:no-repeat;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(255,255,255,.97) 0%,rgba(237,244,252,.93) 48%,rgba(237,244,252,.68) 100%);
}
.hero>.container{position:relative;z-index:1;}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;min-height:520px;}
.hero h1{margin-bottom:18px;}
.hero h1 em{font-style:normal;color:var(--c-primary);}
.hero-sub{font-size:17px;color:var(--c-text-2);max-width:520px;margin-bottom:28px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:36px;}
.metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;border-top:1px solid var(--c-line);padding-top:24px;}
.metric-num{font-size:28px;font-weight:700;line-height:1.2;color:var(--c-primary);}
.metric-label{font-size:13px;color:var(--c-text-3);line-height:1.6;}
.hero-visual{position:relative;}
.hero-media{
  position:relative;border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-2);
  background:var(--c-primary-050);
}
.hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.hero-badge{
  position:absolute;left:20px;bottom:20px;background:#fff;border-radius:var(--r-card);
  padding:14px 18px;box-shadow:var(--sh-1);max-width:250px;
}
.hero-badge strong{display:block;font-size:15px;margin-bottom:4px;}
.hero-badge span{font-size:13px;color:var(--c-text-3);line-height:1.6;}

/* ============ 图片占位 ============ */
.media{position:relative;background:var(--c-primary-050);overflow:hidden;border-radius:var(--r-img);}
.media .ph{
  position:absolute;inset:0;margin:auto;width:46px;height:46px;stroke:#9CBEE2;fill:none;
  stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;
}
.media img{position:relative;z-index:1;width:100%;height:100%;object-fit:cover;}
.media img.is-broken{opacity:0;}

/* ============ 卡片网格 ============ */
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--gap);}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gap);}
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--gap);}
.card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
  display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(31,95,169,.3);}
.card-icon{
  width:44px;height:44px;border-radius:12px;background:var(--c-accent-050);
  display:flex;align-items:center;justify-content:center;margin-bottom:18px;
}
.card-icon svg{width:22px;height:22px;stroke:var(--c-accent);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}
.card h3{font-size:18px;margin-bottom:10px;}
.card p{font-size:15px;color:var(--c-text-2);line-height:1.8;}

/* 内容卡片（带封面） */
.post-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--c-line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);height:100%;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(31,95,169,.3);}
.post-card .media{border-radius:0;}
.post-card .media img{aspect-ratio:16/9;}
.post-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.badge{
  align-self:flex-start;display:inline-flex;align-items:center;gap:6px;
  background:var(--c-primary-050);color:var(--c-primary);
  font-size:12.5px;font-weight:600;border-radius:var(--r-pill);padding:4px 12px;
}
.post-body h3{font-size:19px;line-height:1.5;}
.post-body p{font-size:14.5px;color:var(--c-text-2);line-height:1.75;}
.post-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--c-text-3);padding-top:6px;border-top:1px solid var(--c-line);
}
.post-more{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-weight:600;}
.post-more svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform var(--ease);}
.post-card:hover .post-more svg{transform:translateX(3px);}

/* ============ 交替图文 ============ */
.split{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;}
.split+.split{margin-top:80px;}
.split--rev{grid-template-columns:5fr 7fr;}
.split--rev .split-media{order:-1;}
.split-copy .num{
  font-size:52px;font-weight:700;line-height:1;color:rgba(31,95,169,.16);letter-spacing:-.02em;margin-bottom:10px;
}
.split-copy h3{font-size:24px;margin-bottom:14px;}
.split-copy p{color:var(--c-text-2);margin-bottom:18px;}
.ticks{display:flex;flex-direction:column;gap:10px;}
.ticks li{display:flex;gap:10px;font-size:15px;color:var(--c-text-2);}
.ticks svg{width:18px;height:18px;flex:0 0 auto;margin-top:4px;stroke:var(--c-accent);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;}
.split-media .media{box-shadow:var(--sh-1);border-radius:var(--r-card);}
.split-media img{aspect-ratio:16/10;}

/* ============ 步骤 ============ */
.steps{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:20px;counter-reset:step;}
.step{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);padding:24px 20px;
  position:relative;transition:border-color var(--ease),box-shadow var(--ease),transform var(--ease);
}
.step:hover{border-color:rgba(31,95,169,.3);box-shadow:var(--sh-1);transform:translateY(-2px);}
.step-index{
  width:30px;height:30px;border-radius:var(--r-pill);background:var(--c-primary-050);color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;margin-bottom:14px;
}
.step h4{font-size:16px;margin-bottom:8px;}
.step p{font-size:14px;color:var(--c-text-2);line-height:1.75;}

/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--c-line);max-width:860px;}
.faq-item{border-bottom:1px solid var(--c-line);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:flex-start;justify-content:space-between;gap:20px;
  padding:22px 0 22px 0;transition:color var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary h3{font-size:17.5px;font-weight:650;line-height:1.55;transition:color var(--ease);}
.faq-item summary:hover h3{color:var(--c-primary);}
.faq-sign{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;border:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:center;position:relative;transition:border-color var(--ease),background var(--ease);
}
.faq-sign::before,.faq-sign::after{content:"";position:absolute;background:var(--c-primary);border-radius:2px;}
.faq-sign::before{width:11px;height:1.8px;}
.faq-sign::after{width:1.8px;height:11px;transition:transform var(--ease),opacity var(--ease);}
.faq-item[open] .faq-sign::after{transform:scaleY(0);opacity:0;}
.faq-item[open] .faq-sign{border-color:var(--c-accent);background:var(--c-accent-050);}
.faq-body{
  padding:0 0 24px 0;margin-left:0;border-left:4px solid var(--c-accent);padding-left:18px;
}
.faq-body p{font-size:15px;line-height:1.8;color:var(--c-text-2);}
.faq-body p+p{margin-top:12px;}

/* ============ CTA 大板 ============ */
.cta-panel{
  background:var(--c-primary);border-radius:var(--r-panel);padding:64px 40px;color:#fff;
  display:grid;grid-template-columns:1fr auto;gap:32px;align-items:center;
}
.cta-panel h2{color:#fff;margin-bottom:12px;font-size:28px;}
.cta-panel p{color:rgba(255,255,255,.86);font-size:16px;max-width:620px;}
.cta-panel .btn{flex:0 0 auto;}

/* ============ 分类互链 ============ */
.link-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--gap);}
.link-card{
  display:flex;align-items:center;gap:18px;padding:22px 24px;background:#fff;
  border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-1);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.link-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(31,95,169,.3);}
.link-card .card-icon{margin-bottom:0;flex:0 0 auto;}
.link-card h3{font-size:17px;margin-bottom:6px;}
.link-card p{font-size:14px;color:var(--c-text-2);}
.link-card .arrow{margin-left:auto;flex:0 0 auto;color:var(--c-primary);}
.link-card .arrow svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;}

/* ============ 页脚 ============ */
.site-footer{background:var(--c-dark);color:#B9CBDF;padding:72px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}
.site-footer .logo{color:#fff;font-size:18px;}
.site-footer .logo:hover{color:#fff;}
.site-footer .logo-mark{background:#1B4477;}
.footer-desc{font-size:14px;line-height:1.8;color:#9FB5CC;margin-top:16px;max-width:320px;}
.footer-title{font-size:15px;color:#fff;margin-bottom:18px;font-weight:650;}
.footer-list li+li{margin-top:12px;}
.footer-list a{font-size:14px;color:#B9CBDF;}
.footer-list a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}
.footer-contact li{display:flex;gap:10px;font-size:14px;line-height:1.7;color:#B9CBDF;}
.footer-contact li+li{margin-top:14px;}
.footer-contact svg{width:17px;height:17px;flex:0 0 auto;margin-top:4px;stroke:var(--c-accent);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}
.footer-bottom{
  margin-top:56px;border-top:1px solid rgba(255,255,255,.12);padding:22px 0 28px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:13px;color:#8FA6BE;
}

/* ============ 滚动淡入 ============ */
.reveal{opacity:0;transform:translateY(16px);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 ============ */
@media (max-width:1279px){
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr));}
  .steps{grid-template-columns:repeat(3,minmax(0,1fr));}
}
@media (max-width:1023px){
  h1{font-size:32px;}
  h2{font-size:26px;}
  .nav{display:none;}
  .burger{display:inline-flex;}
  .nav-actions .btn--primary{display:none;}
  .hero-grid{grid-template-columns:1fr;gap:36px;min-height:0;}
  .hero{background-position:center;}
  .split,.split--rev{grid-template-columns:1fr;gap:28px;}
  .split--rev .split-media{order:0;}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
  .cta-panel{grid-template-columns:1fr;padding:48px 32px;}
}
@media (max-width:767px){
  .section{padding:64px 0;}
  .section--tight{padding:56px 0;}
  h1{font-size:26px;line-height:1.35;}
  h2{font-size:22px;}
  .hero{padding:28px 0 56px;}
  .hero-sub{font-size:16px;}
  .grid-2,.grid-3,.grid-4,.link-cards{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .metrics{grid-template-columns:1fr;gap:16px;}
  .metric-num{font-size:24px;}
  .card,.post-body{padding:20px;}
  .topbar-left{display:none;}
  .topbar .container{justify-content:flex-end;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .cta-panel{padding:40px 24px;}
  .cta-panel h2{font-size:22px;}
  .section-head--row{flex-direction:column;align-items:flex-start;}
}
@media (max-width:479px){
  .container{padding:0 18px;}
  .hero-cta .btn{width:100%;}
  .hero-badge{position:static;margin:14px 0 0;max-width:none;box-shadow:none;border:1px solid var(--c-line);}
  .faq-item summary{padding:18px 0;}
  .footer-grid{grid-template-columns:1fr;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important;scroll-behavior:auto !important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category2 */
:root{
  --c-primary:#1F5FA9;
  --c-primary-600:#17497F;
  --c-primary-050:#EDF4FC;
  --c-accent:#12A594;
  --c-accent-050:#E6F6F4;
  --c-warm:#E08A2E;
  --c-text:#10233C;
  --c-text-2:#55677E;
  --c-text-3:#93A2B3;
  --c-line:#E3EAF2;
  --c-bg:#FFFFFF;
  --c-bg-alt:#F5F8FC;
  --c-dark:#0E2A4A;
  --c-success:#12A594;
  --c-error:#D2453C;
  --c-warn:#D08A1E;
  --r-card:14px;
  --r-cta:20px;
  --r-ctrl:10px;
  --r-img:12px;
  --r-pill:999px;
  --sh-card:0 6px 20px -8px rgba(15,36,64,.12);
  --sh-hover:0 14px 32px -10px rgba(15,36,64,.18);
  --sh-nav:0 1px 0 #E3EAF2;
  --ease:180ms cubic-bezier(.2,.7,.3,1);
  --container:1200px;
  --font:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--c-text);
  background:var(--c-bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--c-primary);text-decoration:none;transition:color var(--ease);}
a:hover{color:var(--c-primary-600);text-decoration:underline;text-underline-offset:3px;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:600;letter-spacing:-0.01em;color:var(--c-text);}
p{margin:0;}
button{font-family:inherit;}
svg{display:block;}
.num{font-variant-numeric:tabular-nums;}

:focus-visible{outline:3px solid rgba(31,95,169,.25);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}

/* ---------- 顶部信息条 ---------- */
.topbar{
  background:var(--c-dark);
  color:#D8E6F5;
  font-size:13px;
  line-height:34px;
  height:34px;
}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;}
.topbar-left{display:flex;align-items:center;gap:12px;white-space:nowrap;overflow:hidden;}
.topbar-domain{font-variant-numeric:tabular-nums;color:#ffffff;font-weight:600;letter-spacing:.02em;}
.topbar-sep{width:1px;height:12px;background:rgba(216,230,245,.28);}
.topbar-left span{color:#B9CBDF;}
.topbar-right a{color:#D8E6F5;display:inline-flex;align-items:center;gap:6px;}
.topbar-right a:hover{color:#fff;text-decoration:none;}
.topbar-right svg{width:15px;height:15px;stroke:#8FB4DA;}

/* ---------- 主导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:#fff;
  box-shadow:var(--sh-nav);
}
.nav-wrap{
  height:72px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
  color:var(--c-text);
  flex:0 0 auto;
}
.logo:hover{text-decoration:none;color:var(--c-text);}
.logo-mark{
  width:36px;height:36px;
  border-radius:10px;
  background:var(--c-primary-050);
  color:var(--c-primary);
  display:inline-flex;align-items:center;justify-content:center;
}
.logo-mark svg{width:20px;height:20px;stroke:currentColor;fill:none;}
.logo-text{font-size:18px;font-weight:700;letter-spacing:-.01em;}
.nav{flex:1 1 auto;display:flex;justify-content:center;}
.nav-list{display:flex;align-items:center;gap:28px;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:6px 0;
  font-size:15px;
  color:var(--c-text-2);
  text-decoration:none;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:50%;right:50%;
  bottom:0;
  height:2px;
  background:var(--c-primary);
  border-radius:2px;
  transition:left var(--ease),right var(--ease);
}
.nav-link:hover{color:var(--c-primary);text-decoration:none;}
.nav-link:hover::after{left:0;right:0;}
.nav-link.active{color:var(--c-primary);font-weight:600;}
.nav-link.active::after{left:0;right:0;}
.nav-cta{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.menu-toggle{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--c-line);
  border-radius:var(--r-ctrl);
  background:#fff;
  cursor:pointer;
  align-items:center;justify-content:center;
}
.menu-toggle svg{width:22px;height:22px;stroke:var(--c-text);fill:none;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 22px;
  border-radius:var(--r-ctrl);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  text-decoration:none;
  transition:background var(--ease),color var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease);
  white-space:nowrap;
}
.btn:hover{text-decoration:none;transform:translateY(-1px);}
.btn:active{transform:none;}
.btn-primary{background:var(--c-primary);color:#fff;}
.btn-primary:hover{background:var(--c-primary-600);color:#fff;}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:rgba(31,95,169,.35);}
.btn-ghost:hover{background:var(--c-primary-050);color:var(--c-primary-600);border-color:var(--c-primary);}
.btn-light{background:#fff;color:var(--c-primary);}
.btn-light:hover{background:#EAF2FB;color:var(--c-primary-600);}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.5;pointer-events:none;}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}

/* ---------- 抽屉 ---------- */
.drawer{
  position:fixed;
  inset:0;
  background:#fff;
  z-index:120;
  transform:translateX(100%);
  transition:transform 240ms cubic-bezier(.2,.7,.3,1);
  display:flex;
  flex-direction:column;
  padding:20px 24px 0;
  visibility:hidden;
}
.drawer.open{transform:translateX(0);visibility:visible;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.drawer-close{
  width:44px;height:44px;border:1px solid var(--c-line);border-radius:var(--r-ctrl);
  background:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;
}
.drawer-close svg{width:20px;height:20px;stroke:var(--c-text);fill:none;}
.drawer-list{display:flex;flex-direction:column;gap:16px;}
.drawer-list a{
  display:block;
  padding:14px 16px;
  border-radius:var(--r-ctrl);
  background:var(--c-bg-alt);
  color:var(--c-text);
  font-size:16px;
  font-weight:600;
  text-decoration:none;
}
.drawer-list a.active{background:var(--c-primary-050);color:var(--c-primary);}
.drawer-foot{margin-top:auto;padding:20px 0 24px;position:sticky;bottom:0;background:#fff;}
body.no-scroll{overflow:hidden;}

/* ---------- 面包屑 ---------- */
.crumb{
  font-size:14px;
  color:var(--c-text-3);
  padding:22px 0 0;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.crumb a{color:var(--c-text-2);}
.crumb a:hover{color:var(--c-primary);}
.crumb span{color:var(--c-text-3);}

/* ---------- 页头 ---------- */
.page-hero{
  padding:26px 0 64px;
  background:
    linear-gradient(90deg,rgba(31,95,169,.10),rgba(31,95,169,.02) 55%,rgba(255,255,255,0) 100%),
    url("/assets/images/backpic/back-2.png") center/cover no-repeat;
}
.hero-grid{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:40px;
  align-items:center;
  min-height:400px;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:600;
  color:var(--c-primary);
  background:var(--c-primary-050);
  border-radius:var(--r-pill);
  padding:6px 14px;
  margin-bottom:18px;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--c-accent);}
.page-hero h1{
  font-size:40px;
  line-height:1.25;
  font-weight:700;
  margin-bottom:18px;
}
.page-hero h1 em{font-style:normal;color:var(--c-primary);}
.hero-sub{
  font-size:17px;
  line-height:1.85;
  color:var(--c-text-2);
  max-width:600px;
  margin-bottom:28px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:30px;}
.stat-strip{
  display:flex;
  flex-wrap:wrap;
  gap:40px;
  padding-top:22px;
  border-top:1px solid rgba(31,95,169,.14);
}
.stat-strip .stat-num{font-size:28px;font-weight:700;line-height:1.2;color:var(--c-text);}
.stat-strip .stat-label{font-size:13px;color:var(--c-text-3);margin-top:2px;}
.hero-figure{
  position:relative;
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-card);
  background:var(--c-primary-050);
  aspect-ratio:16/11;
}
.hero-figure img{width:100%;height:100%;object-fit:cover;}
.hero-figure .badge-float{
  position:absolute;
  left:16px;bottom:16px;
  background:#fff;
  border-radius:var(--r-pill);
  padding:8px 16px;
  font-size:13px;
  font-weight:600;
  color:var(--c-primary);
  box-shadow:var(--sh-card);
  display:flex;align-items:center;gap:8px;
}
.hero-figure .badge-float svg{width:16px;height:16px;stroke:var(--c-accent);fill:none;}

/* ---------- 主体两栏 ---------- */
.section{padding:96px 0;}
.section-alt{background:var(--c-bg-alt);}
.section-head{margin-bottom:36px;max-width:720px;}
.section-head h2{font-size:30px;line-height:1.3;margin-bottom:12px;}
.section-head p{color:var(--c-text-2);font-size:16px;}

.cat-layout{
  display:grid;
  grid-template-columns:280px minmax(0,1fr);
  gap:40px;
  align-items:start;
}
.cat-aside{position:sticky;top:104px;}
.aside-panel{
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  background:#fff;
  padding:22px;
  box-shadow:var(--sh-card);
}
.aside-title{
  font-size:13px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--c-text-3);
  text-transform:uppercase;
  margin-bottom:14px;
}
.side-nav{display:flex;flex-direction:column;gap:2px;}
.side-nav a{
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px 12px;
  border-radius:var(--r-ctrl);
  font-size:15px;
  color:var(--c-text-2);
  text-decoration:none;
  border-left:3px solid transparent;
}
.side-nav a::before{
  content:"";
  width:6px;height:6px;border-radius:50%;
  background:var(--c-line);
  flex:0 0 auto;
  transition:background var(--ease);
}
.side-nav a:hover{background:var(--c-primary-050);color:var(--c-primary);}
.side-nav a:hover::before{background:var(--c-accent);}
.side-nav a.current{background:var(--c-primary-050);color:var(--c-primary);font-weight:600;border-left-color:var(--c-primary);}
.side-nav a.current::before{background:var(--c-primary);}

.aside-card{
  margin-top:20px;
  border-radius:var(--r-card);
  padding:22px;
  background:var(--c-dark);
  color:#D8E6F5;
}
.aside-card h3{color:#fff;font-size:17px;margin-bottom:10px;}
.aside-card p{font-size:14px;line-height:1.8;color:#B9CBDF;margin-bottom:16px;}
.aside-card .aside-mail{
  display:flex;align-items:center;gap:8px;
  font-size:14px;color:#fff;font-variant-numeric:tabular-nums;
  margin-bottom:16px;word-break:break-all;
}
.aside-card .aside-mail svg{width:16px;height:16px;stroke:#8FB4DA;fill:none;flex:0 0 auto;}
.aside-card .btn-light{width:100%;}

/* ---------- 横向条目列表 ---------- */
.post-list{display:flex;flex-direction:column;}
.post-item{
  display:grid;
  grid-template-columns:200px minmax(0,1fr);
  gap:24px;
  padding:24px 0;
  border-bottom:1px solid var(--c-line);
  transition:background var(--ease);
}
.post-item:first-child{padding-top:0;}
.post-thumb{
  position:relative;
  border-radius:var(--r-img);
  overflow:hidden;
  background:var(--c-primary-050);
  aspect-ratio:5/3;
  box-shadow:var(--sh-card);
}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 320ms cubic-bezier(.2,.7,.3,1);}
.post-item:hover .post-thumb img{transform:scale(1.04);}
.post-thumb .media-chip{
  position:absolute;
  right:10px;bottom:10px;
  width:32px;height:32px;
  border-radius:50%;
  background:rgba(255,255,255,.92);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 12px -4px rgba(15,36,64,.3);
}
.post-thumb .media-chip svg{width:15px;height:15px;stroke:var(--c-primary);fill:none;}
.post-body h3{font-size:20px;line-height:1.45;margin-bottom:10px;}
.post-body h3 a{color:var(--c-text);text-decoration:none;}
.post-body h3 a:hover{color:var(--c-primary);}
.post-body p{font-size:15px;line-height:1.8;color:var(--c-text-2);margin-bottom:14px;}
.post-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:13px;color:var(--c-text-3);}
.post-meta .tag{
  background:var(--c-accent-050);
  color:#0C7A6E;
  border-radius:var(--r-pill);
  padding:3px 12px;
  font-weight:600;
  font-size:12px;
}
.post-meta .more-link{
  margin-left:auto;
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-weight:600;
  font-size:14px;
  color:var(--c-primary);
}
.post-meta .more-link svg{width:14px;height:14px;stroke:currentColor;fill:none;transition:transform var(--ease);}
.post-meta .more-link:hover{text-decoration:none;color:var(--c-primary-600);}
.post-meta .more-link:hover svg{transform:translateX(3px);}

/* ---------- 处理流程 ---------- */
.steps{
  display:grid;
  grid-template-columns:repeat(5,minmax(0,1fr));
  gap:20px;
  counter-reset:step;
}
.step{
  position:relative;
  background:#fff;
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  padding:24px 20px;
  box-shadow:var(--sh-card);
  transition:border-color var(--ease),box-shadow var(--ease),transform var(--ease);
}
.step:hover{border-color:rgba(31,95,169,.3);box-shadow:var(--sh-hover);transform:translateY(-2px);}
.step .step-num{
  font-size:26px;
  font-weight:700;
  color:rgba(31,95,169,.22);
  font-variant-numeric:tabular-nums;
  line-height:1;
  margin-bottom:12px;
}
.step h3{font-size:17px;margin-bottom:8px;}
.step p{font-size:14px;line-height:1.75;color:var(--c-text-2);}

/* ---------- 数据带 ---------- */
.data-band{
  background:var(--c-dark);
  border-radius:var(--r-cta);
  padding:44px 40px;
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:24px;
  color:#fff;
  margin-top:32px;
}
.data-band .data-num{font-size:28px;font-weight:700;font-variant-numeric:tabular-nums;color:#fff;}
.data-band .data-num em{font-style:normal;color:#7FD6C9;}
.data-band .data-label{font-size:13px;color:#B9CBDF;margin-top:6px;}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--c-line);}
.faq-item{border-bottom:1px solid var(--c-line);}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  padding:20px 0;
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:20px;
  font-size:17px;
  font-weight:600;
  color:var(--c-text);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--c-primary);}
.faq-item .minus{
  flex:0 0 auto;
  width:24px;height:24px;
  position:relative;
  margin-top:4px;
}
.faq-item .minus::before,
.faq-item .minus::after{
  content:"";
  position:absolute;
  background:var(--c-accent);
  border-radius:2px;
  transition:transform var(--ease),opacity var(--ease);
}
.faq-item .minus::before{left:4px;right:4px;top:11px;height:2px;}
.faq-item .minus::after{top:4px;bottom:4px;left:11px;width:2px;}
.faq-item[open] .minus::after{transform:scaleY(0);opacity:0;}
.faq-item .faq-answer{
  padding:0 0 22px 0;
  border-left:4px solid var(--c-accent);
  padding-left:18px;
  margin:0 0 4px 0;
  font-size:15px;
  line-height:1.8;
  color:var(--c-text-2);
}

/* ---------- 分类互链 ---------- */
.link-cards{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
.link-card{
  display:flex;
  gap:18px;
  align-items:center;
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  padding:22px;
  background:#fff;
  box-shadow:var(--sh-card);
  text-decoration:none;
  transition:border-color var(--ease),box-shadow var(--ease),transform var(--ease);
}
.link-card:hover{border-color:rgba(31,95,169,.3);box-shadow:var(--sh-hover);transform:translateY(-2px);text-decoration:none;}
.link-card .lc-icon{
  flex:0 0 auto;
  width:46px;height:46px;
  border-radius:12px;
  background:var(--c-primary-050);
  display:flex;align-items:center;justify-content:center;
}
.link-card .lc-icon svg{width:22px;height:22px;stroke:var(--c-primary);fill:none;}
.link-card h3{font-size:17px;margin-bottom:6px;color:var(--c-text);}
.link-card p{font-size:14px;color:var(--c-text-2);line-height:1.7;}

/* ---------- CTA ---------- */
.cta-panel{
  background:var(--c-primary);
  border-radius:var(--r-cta);
  padding:64px 40px;
  color:#fff;
  text-align:center;
}
.cta-panel h2{color:#fff;font-size:30px;line-height:1.35;margin-bottom:14px;}
.cta-panel p{color:rgba(255,255,255,.86);font-size:16px;max-width:620px;margin:0 auto 28px;}
.cta-icons{display:flex;justify-content:center;gap:28px;flex-wrap:wrap;margin-bottom:28px;}
.cta-icons span{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,.9);}
.cta-icons svg{width:17px;height:17px;stroke:#fff;fill:none;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-dark);color:#B9CBDF;padding:64px 0 0;margin-top:0;}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1.4fr;
  gap:40px;
  padding-bottom:40px;
}
.footer-brand .logo{color:#fff;}
.footer-brand .logo-mark{background:rgba(255,255,255,.1);color:#7FD6C9;}
.footer-brand .logo-text{color:#fff;}
.footer-desc{font-size:14px;line-height:1.85;color:#B9CBDF;margin-top:16px;max-width:320px;}
.footer-title{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600;}
.footer-list li{margin-bottom:10px;}
.footer-list a{color:#B9CBDF;font-size:14px;text-decoration:none;}
.footer-list a:hover{color:#fff;text-decoration:none;}
.footer-contact li{display:flex;align-items:flex-start;gap:10px;font-size:14px;margin-bottom:12px;line-height:1.7;}
.footer-contact svg{width:17px;height:17px;stroke:#8FB4DA;fill:none;flex:0 0 auto;margin-top:4px;}
.footer-bottom{
  border-top:1px solid rgba(185,203,223,.18);
  padding:20px 0 26px;
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:#8FA9C4;
  font-variant-numeric:tabular-nums;
}

/* ---------- 滚动淡入 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity 520ms cubic-bezier(.2,.7,.3,1),transform 520ms cubic-bezier(.2,.7,.3,1);}
.reveal.in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .steps{grid-template-columns:repeat(3,minmax(0,1fr));}
  .data-band{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:1023px){
  .nav{display:none;}
  .nav-cta .btn{display:none;}
  .menu-toggle{display:flex;}
  .hero-grid{grid-template-columns:1fr;gap:28px;min-height:auto;}
  .page-hero{padding-bottom:52px;}
  .cat-layout{grid-template-columns:1fr;gap:28px;}
  .cat-aside{position:static;}
  .aside-panel{padding:18px;}
  .side-nav{flex-direction:row;flex-wrap:wrap;gap:8px;}
  .side-nav a{background:var(--c-bg-alt);border-left:none;padding:8px 14px;font-size:14px;}
  .side-nav a.current{background:var(--c-primary-050);}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
  .section{padding:72px 0;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .topbar-left span:last-child{display:none;}
  .topbar-sep{display:none;}
  .page-hero h1{font-size:26px;line-height:1.35;}
  .section-head h2,.cta-panel h2{font-size:22px;}
  .hero-sub{font-size:15px;}
  .stat-strip{gap:20px;}
  .stat-strip .stat-num{font-size:22px;}
  .section{padding:64px 0;}
  .post-item{grid-template-columns:1fr;gap:16px;}
  .post-thumb{aspect-ratio:16/9;}
  .steps{grid-template-columns:1fr;}
  .data-band{grid-template-columns:1fr 1fr;padding:32px 24px;}
  .link-cards{grid-template-columns:1fr;}
  .cta-panel{padding:40px 24px;}
  .footer-grid{padding-bottom:28px;}
  .sh-card,.post-thumb,.step,.aside-panel{box-shadow:0 3px 12px -6px rgba(15,36,64,.12);}
}
@media (max-width:519px){
  .logo-text{font-size:16px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .data-band{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;gap:6px;}
  .post-meta .more-link{margin-left:0;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
  .reveal{opacity:1;transform:none;}
}