/* roulang page: index */
:root{
  --brand:#1B6BB8;
  --brand-dark:#12538F;
  --brand-light:#E8F2FC;
  --teal:#18A999;
  --amber:#F2A33A;
  --bg:#F6F9FC;
  --surface:#FFFFFF;
  --border:#E2EAF2;
  --text:#102033;
  --muted:#5B6B7C;
  --faint:#8A99A8;
  --danger:#D9534F;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-input:12px;
  --radius-img:14px;
  --shadow-card:0 12px 28px rgba(17,54,90,.08);
  --shadow-hover:0 18px 40px rgba(17,54,90,.14);
  --shadow-btn:0 6px 16px rgba(27,107,184,.22);
  --container:1200px;
  --bs-primary:#1B6BB8;
  --bs-body-color:#102033;
  --bs-border-radius:12px;
  --bs-body-font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  padding-bottom:0;
  overflow-x:hidden;
}
a{color:var(--brand);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand-dark)}
img{max-width:100%;display:block}
h1,h2,h3,h4{line-height:1.25;color:var(--text);margin:0}
h1{font-weight:700;font-size:40px}
h2{font-weight:700;font-size:30px}
h3{font-weight:600;font-size:22px}
p{margin:0 0 14px}
ul{list-style:none;padding:0;margin:0}
button,input,select,textarea{font-family:inherit;font-size:inherit}
:focus-visible{outline:3px solid rgba(27,107,184,.35);outline-offset:2px;border-radius:6px}

.wrap{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.narrow{max-width:820px}
.section{padding:88px 0}
.section-tight{padding:60px 0}
.section-alt{background:var(--surface)}
.section-dark{background:#0F2942;color:#E9F1F8}
.section-dark h2,.section-dark h3{color:#fff}
.section-dark p{color:#B7C9DA}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--brand);background:var(--brand-light);
  border-radius:999px;padding:6px 14px;margin-bottom:16px;
}
.eyebrow.on-dark{background:rgba(255,255,255,.12);color:#CFE4F7}
.section-head{max-width:760px;margin-bottom:40px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head p{color:var(--muted);margin-top:14px;font-size:16px}
.lead{color:var(--muted);font-size:17px}

/* 按钮 */
.btn-brand,.btn-ghost,.btn-amber{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:background .2s ease,color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.btn-brand{background:var(--brand);color:#fff;box-shadow:var(--shadow-btn)}
.btn-brand:hover{background:var(--brand-dark);color:#fff;transform:translateY(-2px)}
.btn-amber{background:var(--amber);color:#3A2606}
.btn-amber:hover{background:#DE8F26;color:#3A2606;transform:translateY(-2px)}
.btn-ghost{background:#fff;color:var(--text);border-color:var(--border)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:15px}
.link-arrow i{transition:transform .2s ease}
.link-arrow:hover i{transform:translateX(4px)}
.btn-block{width:100%}

/* 顶部导航 */
.site-header{
  position:sticky;top:0;z-index:1030;background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--border);
}
.nav-inner{
  height:74px;display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:19px;color:var(--text)}
.brand:hover{color:var(--text)}
.brand-mark{
  width:38px;height:38px;border-radius:11px;
  background:linear-gradient(135deg,var(--brand) 0%,var(--brand-dark) 100%);
  color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;
  box-shadow:0 6px 14px rgba(27,107,184,.28);
}
.brand-sub{display:block;font-size:11px;font-weight:500;color:var(--faint);letter-spacing:.04em}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{
  display:inline-block;padding:9px 14px;border-radius:9px;
  font-size:15px;color:var(--muted);font-weight:500;
}
.nav-links a:hover{background:var(--bg);color:var(--brand)}
.nav-links a.active{color:var(--brand);background:var(--brand-light);font-weight:600}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-actions .btn-brand{height:42px;padding:0 18px;font-size:14px}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--border);
  background:#fff;color:var(--text);font-size:16px;
}
.mobile-menu{display:none;border-top:1px solid var(--border);background:#fff;padding:10px 0 18px}
.mobile-menu.open{display:block}
.mobile-menu a{display:block;padding:12px 4px;font-size:15px;color:var(--muted);border-bottom:1px solid var(--bg)}
.mobile-menu a.active{color:var(--brand);font-weight:600}

/* Hero */
.hero{
  position:relative;
  background:linear-gradient(180deg,#F2F8FE 0%,var(--bg) 100%);
  padding:70px 0 76px;overflow:hidden;
}
.hero::after{
  content:"";position:absolute;right:-140px;top:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(27,107,184,.12) 0%,rgba(27,107,184,0) 70%);
}
.hero-grid{display:grid;grid-template-columns:58% 42%;gap:48px;align-items:center;position:relative;z-index:1}
.hero h1{font-size:40px;margin-bottom:18px}
.hero h1 em{font-style:normal;color:var(--brand);position:relative}
.hero .hero-sub{font-size:17px;color:var(--muted);max-width:560px;margin-bottom:26px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  display:inline-flex;align-items:center;gap:7px;background:#fff;border:1px solid var(--border);
  border-radius:999px;padding:7px 14px;font-size:13px;color:var(--muted);box-shadow:0 4px 12px rgba(17,54,90,.05);
}
.chip i{color:var(--teal)}
.hero-media{position:relative}
.hero-media .img-card{
  border-radius:20px;overflow:hidden;box-shadow:var(--shadow-hover);border:6px solid #fff;
  aspect-ratio:4/3;background:#fff;
}
.hero-media img{width:100%;height:100%;object-fit:cover}
.float-badge{
  position:absolute;left:-16px;bottom:24px;background:#fff;border:1px solid var(--border);
  border-radius:14px;padding:12px 16px;box-shadow:var(--shadow-card);display:flex;align-items:center;gap:12px;
}
.float-badge .num{font-size:22px;font-weight:700;color:var(--brand);line-height:1}
.float-badge .txt{font-size:12px;color:var(--muted);line-height:1.4}

/* 数据条 */
.stat-bar{background:#fff;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.stat-item{padding:26px 20px;text-align:center;border-right:1px solid var(--border)}
.stat-item:last-child{border-right:none}
.stat-item .num{font-size:26px;font-weight:700;color:var(--brand-dark);line-height:1.2}
.stat-item .lbl{font-size:13px;color:var(--muted);margin-top:6px}

/* 步骤 */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;position:relative}
.step-card{
  position:relative;background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
  padding:28px 24px;box-shadow:var(--shadow-card);transition:transform .25s ease,box-shadow .25s ease;
}
.step-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.step-num{font-size:13px;font-weight:700;color:var(--brand);letter-spacing:.08em;margin-bottom:12px}
.step-icon{
  width:46px;height:46px;border-radius:13px;background:var(--brand-light);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-size:19px;margin-bottom:16px;
}
.step-card h3{font-size:19px;margin-bottom:10px}
.step-card p{font-size:15px;color:var(--muted);margin:0}
.step-line{position:absolute;top:52px;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--brand-light),var(--brand),var(--brand-light));opacity:.55;z-index:0}

/* 核验清单 */
.check-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.check-item{
  display:flex;gap:14px;background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
  padding:22px;box-shadow:var(--shadow-card);transition:transform .2s ease,box-shadow .2s ease;
}
.check-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.check-item .ico{
  flex:0 0 40px;height:40px;border-radius:11px;background:rgba(24,169,153,.12);color:var(--teal);
  display:flex;align-items:center;justify-content:center;font-size:16px;
}
.check-item h3{font-size:17px;margin-bottom:6px}
.check-item p{font-size:14px;color:var(--muted);margin:0}

/* 案例 */
.case-grid{display:grid;grid-template-columns:1.45fr 1fr;gap:26px;align-items:stretch}
.case-lg{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);overflow:hidden;
  box-shadow:var(--shadow-card);display:flex;flex-direction:column;
}
.case-lg .cover{aspect-ratio:16/9;overflow:hidden}
.case-lg .cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.case-lg:hover .cover img{transform:scale(1.04)}
.case-lg .body{padding:26px}
.case-lg h3{font-size:21px;margin-bottom:12px}
.case-lg p{color:var(--muted);font-size:15px}
.case-metrics{display:flex;gap:26px;margin-top:18px;padding-top:18px;border-top:1px dashed var(--border)}
.case-metrics .m-num{font-size:22px;font-weight:700;color:var(--brand-dark)}
.case-metrics .m-lbl{font-size:12px;color:var(--faint)}
.case-sm{
  background:linear-gradient(160deg,#123A5F 0%,#0F2942 100%);color:#DCE9F4;border-radius:var(--radius-card);
  padding:28px;display:flex;flex-direction:column;justify-content:space-between;box-shadow:var(--shadow-card);
}
.case-sm h3{color:#fff;font-size:19px;margin-bottom:12px}
.case-sm p{color:#B7C9DA;font-size:14px}
.case-sm .thumb{border-radius:var(--radius-img);overflow:hidden;margin-top:18px;aspect-ratio:16/9}
.case-sm .thumb img{width:100%;height:100%;object-fit:cover}
.tag{
  display:inline-block;font-size:12px;font-weight:600;padding:5px 12px;border-radius:999px;
  background:var(--brand-light);color:var(--brand-dark);margin-right:8px;
}
.tag.teal{background:rgba(24,169,153,.12);color:#0F7D73}
.tag.amber{background:rgba(242,163,58,.16);color:#8A5A11}
.tag.on-dark{background:rgba(255,255,255,.14);color:#DCE9F4}

/* 最新信息 */
.news-filter{display:flex;gap:10px;overflow-x:auto;padding-bottom:6px;margin-bottom:26px;scrollbar-width:none}
.news-filter::-webkit-scrollbar{display:none}
.news-filter span{
  white-space:nowrap;font-size:13px;padding:7px 15px;border-radius:999px;border:1px solid var(--border);
  background:#fff;color:var(--muted);
}
.news-filter span.on{background:var(--brand);border-color:var(--brand);color:#fff}
.news-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);padding:24px;
  box-shadow:var(--shadow-card);height:100%;transition:transform .22s ease,box-shadow .22s ease;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.news-card .news-link{display:block;color:inherit}
.news-card h3{font-size:18px;margin-bottom:10px}
.news-card:hover h3{color:var(--brand)}
.news-summary{font-size:14px;color:var(--muted);margin-bottom:16px}
.news-meta{display:flex;align-items:center;gap:12px;font-size:12px;color:var(--faint)}
.empty-state{
  text-align:center;background:#fff;border:1px dashed var(--border);border-radius:var(--radius-card);
  padding:56px 24px;color:var(--muted);
}
.empty-state i{font-size:32px;color:var(--faint);display:block;margin-bottom:14px}

/* FAQ */
.faq-grid{display:grid;grid-template-columns:5fr 7fr;gap:44px;align-items:start}
.faq-side h2{margin-bottom:16px}
.faq-side p{color:var(--muted);font-size:15px}
.accordion-item{border:1px solid var(--border);border-radius:14px !important;margin-bottom:12px;overflow:hidden;background:#fff}
.accordion-button{
  font-size:16px;font-weight:600;color:var(--text);background:#fff;padding:20px 22px;
  box-shadow:none !important;border-left:4px solid transparent;
}
.accordion-button:not(.collapsed){color:var(--brand-dark);background:var(--brand-light);border-left-color:var(--brand)}
.accordion-button::after{background-size:14px;filter:grayscale(1) opacity(.6)}
.accordion-body{font-size:15px;color:var(--muted);padding:4px 22px 22px;background:#fff;border-left:4px solid var(--border)}
.accordion-button:not(.collapsed)+.accordion-collapse .accordion-body{border-left-color:var(--brand)}

/* CTA + 表单 */
.cta-panel{
  background:linear-gradient(150deg,#E9F3FD 0%,#F7FBFF 60%,#FFFFFF 100%);
  border:1px solid var(--border);border-radius:24px;padding:48px;box-shadow:var(--shadow-card);
}
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
.cta-list{display:grid;gap:12px;margin-top:20px}
.cta-list li{display:flex;gap:10px;font-size:15px;color:var(--muted);align-items:flex-start}
.cta-list i{color:var(--teal);margin-top:5px}
.form-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);padding:28px;box-shadow:var(--shadow-card)}
.form-label{font-size:13px;font-weight:600;color:var(--muted);margin-bottom:7px}
.form-control,.form-select{
  height:48px;border-radius:var(--radius-input);border:1px solid var(--border);font-size:15px;
  color:var(--text);background:#FBFDFF;
}
.form-control:focus,.form-select:focus{
  border-color:var(--brand);box-shadow:0 0 0 4px rgba(27,107,184,.14);background:#fff;color:var(--text);
}
.form-hint{font-size:12px;color:var(--faint);margin-top:12px}
.form-feedback{display:none;margin-top:14px;font-size:14px;color:var(--teal);font-weight:600}
.form-feedback.show{display:block}

/* 页脚 */
.site-footer{background:#0F2942;color:#B7C9DA;padding:64px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:18px;letter-spacing:.02em}
.site-footer p{font-size:14px;color:#9DB2C6;line-height:1.8}
.footer-links li{margin-bottom:11px}
.footer-links a{color:#B7C9DA;font-size:14px}
.footer-links a:hover{color:#fff}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-brand .brand-mark{background:rgba(255,255,255,.14);box-shadow:none}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:#8CA3B9;
}
.footer-bottom a{color:#8CA3B9}
.footer-bottom a:hover{color:#fff}

/* 移动底部 Tab */
.mobile-tabbar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:1040;
  background:rgba(255,255,255,.97);backdrop-filter:blur(10px);
  border-top:1px solid var(--border);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tabbar ul{display:flex;height:60px}
.mobile-tabbar li{flex:1}
.mobile-tabbar a{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  height:100%;font-size:11px;color:var(--faint);font-weight:500;
}
.mobile-tabbar a i{font-size:18px}
.mobile-tabbar a.active{color:var(--brand)}

@media (max-width:1199px){
  .container, .wrap{max-width:1000px}
  .hero h1{font-size:36px}
}
@media (max-width:991px){
  .nav-links,.nav-actions .btn-brand{display:none}
  .nav-toggle{display:block}
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .hero-media{order:2}
  .float-badge{left:12px;bottom:12px}
  .steps{grid-template-columns:1fr;gap:18px}
  .step-line{display:none}
  .case-grid{grid-template-columns:1fr}
  .faq-grid{grid-template-columns:1fr;gap:28px}
  .cta-grid{grid-template-columns:1fr;gap:30px}
  .cta-panel{padding:34px 24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .check-grid{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:1fr 1fr}
  .stat-item:nth-child(2){border-right:none}
  .stat-item:nth-child(1),.stat-item:nth-child(2){border-bottom:1px solid var(--border)}
  .section{padding:64px 0}
  h1{font-size:32px}
  h2{font-size:26px}
}
@media (max-width:767px){
  body{padding-bottom:80px}
  .mobile-tabbar{display:block}
  .hero{padding:44px 0 54px}
  .hero h1{font-size:28px}
  .hero .hero-sub{font-size:16px}
  .section{padding:52px 0}
  .section-head{margin-bottom:28px}
  h2{font-size:24px}
  h3{font-size:19px}
  .wrap{padding:0 18px}
  .stat-grid{grid-template-columns:1fr 1fr}
  .stat-item{padding:20px 12px}
  .stat-item .num{font-size:22px}
  .cta-panel{padding:26px 18px;border-radius:18px}
  .form-card{padding:20px}
  .btn-brand,.btn-ghost,.btn-amber{width:100%}
  .hero-cta .btn-brand,.hero-cta .btn-ghost{width:auto;flex:1 1 auto}
  .footer-grid{grid-template-columns:1fr}
  .case-metrics{gap:18px}
}
@media (max-width:519px){
  .hero h1{font-size:25px}
  .float-badge{padding:10px 12px}
  .float-badge .num{font-size:18px}
}

/* roulang page: article */
:root{
  --bs-primary:#1B6BB8;
  --bs-primary-rgb:27,107,184;
  --bs-body-font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --bs-body-color:#102033;
  --bs-border-radius:12px;
  --bs-link-color:#1B6BB8;
  --bs-link-hover-color:#12538F;

  --primary:#1B6BB8;
  --primary-dark:#12538F;
  --primary-soft:#E8F2FC;
  --accent:#18A999;
  --warm:#F2A33A;
  --ink:#102033;
  --ink-2:#5B6B7C;
  --ink-3:#8A99A8;
  --line:#E2EAF2;
  --bg:#F6F9FC;
  --card:#FFFFFF;
  --r-card:16px;
  --r-btn:10px;
  --r-img:14px;
  --shadow:0 12px 28px rgba(17,54,90,.08);
  --shadow-hover:0 18px 40px rgba(17,54,90,.14);
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",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:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--primary);text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease,transform .2s ease}
a:hover{color:var(--primary-dark)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.28;color:var(--ink)}
p{margin:0}
button,input,select,textarea{font-family:inherit;font-size:inherit}
:focus-visible{outline:3px solid rgba(27,107,184,.28);outline-offset:2px;border-radius:8px}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:22px;min-height:76px}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:var(--ink);letter-spacing:.2px}
.brand:hover{color:var(--primary-dark)}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--primary);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;font-size:16px;
  box-shadow:0 6px 14px rgba(27,107,184,.28);
}
.nav-links{margin-left:auto;display:flex;align-items:center;gap:6px}
.nav-links a{
  padding:9px 14px;border-radius:10px;font-size:15px;font-weight:500;color:var(--ink-2);
  transition:background-color .2s ease,color .2s ease;
}
.nav-links a:hover{background:var(--primary-soft);color:var(--primary)}
.nav-links a.active{background:var(--primary-soft);color:var(--primary);font-weight:600}
.btn-main{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);border:1px solid transparent;
  background:var(--primary);color:#fff;font-size:15px;font-weight:600;cursor:pointer;
  box-shadow:0 8px 18px rgba(27,107,184,.22);
  transition:background-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-main:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px);box-shadow:0 12px 24px rgba(18,83,143,.26)}
.btn-main:active{transform:translateY(0)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  background:#fff;border:1px solid var(--line);color:var(--ink);font-size:15px;font-weight:600;
  transition:border-color .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-1px);box-shadow:var(--shadow)}
.header-cta{margin-left:8px;height:44px;padding:0 20px;font-size:14px}

/* ---------- article hero ---------- */
.article-hero{background:#fff;border-bottom:1px solid var(--line);padding:36px 0 34px}
.breadcrumb-nav{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--ink-3);margin-bottom:18px}
.breadcrumb-nav a{color:var(--ink-2)}
.breadcrumb-nav a:hover{color:var(--primary)}
.breadcrumb-nav .sep{color:#C6D3DF}
.breadcrumb-nav .current{color:var(--ink-3);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.tag-pill{
  display:inline-block;padding:5px 14px;border-radius:999px;background:var(--primary-soft);
  color:var(--primary-dark);font-size:13px;font-weight:600;letter-spacing:.2px;
}
.article-hero h1{
  font-size:clamp(26px,3.6vw,40px);
  line-height:1.3;
  margin:18px 0 18px;
  letter-spacing:-.4px;
  max-width:960px;
}
.post-meta{display:flex;flex-wrap:wrap;align-items:center;gap:22px;font-size:14px;color:var(--ink-3)}
.post-meta span{display:inline-flex;align-items:center;gap:7px}
.post-meta i{color:var(--primary);font-size:14px}

/* ---------- article body ---------- */
.article-section{padding:52px 0 16px}
.article-shell{max-width:820px;margin:0 auto}
.article-body{
  background:#fff;border:1px solid var(--line);border-radius:20px;padding:44px 46px;
  box-shadow:var(--shadow);
}
.article-cover{margin:0 0 30px;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line)}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover}
.article-body h2{
  position:relative;font-size:26px;line-height:1.35;margin:38px 0 16px;padding-left:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:7px;bottom:7px;width:4px;border-radius:4px;background:var(--primary);
}
.article-body h2:first-child{margin-top:0}
.article-body h3{font-size:20px;line-height:1.42;margin:28px 0 12px;font-weight:600}
.article-body p{margin:0 0 18px;color:#1B2B3D}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:22px}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin-bottom:10px;color:#1B2B3D}
.article-body strong{font-weight:600;color:var(--ink)}
.article-body blockquote{
  margin:24px 0;padding:18px 22px;background:var(--primary-soft);border-left:4px solid var(--primary);
  border-radius:12px;color:var(--primary-dark);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-img);margin:22px 0}
.article-body figure{margin:24px 0}
.article-body a{color:var(--primary);border-bottom:1px solid rgba(27,107,184,.35)}
.article-body a:hover{color:var(--primary-dark);border-bottom-color:var(--primary-dark)}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px}
.article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left}
.article-body th{background:#F4F8FC;font-weight:600}
.article-body code{background:#F1F5F9;padding:2px 6px;border-radius:6px;font-size:14px}
.article-body pre{background:#0F2740;color:#E6EFF8;padding:18px;border-radius:12px;overflow:auto;margin:22px 0}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0}

.note-box{
  display:flex;gap:14px;align-items:flex-start;margin:0 0 26px;padding:18px 22px;
  background:var(--primary-soft);border-left:4px solid var(--accent);border-radius:12px;
}
.note-box i{color:var(--accent);font-size:18px;margin-top:3px}
.note-box p{font-size:14px;line-height:1.8;color:var(--primary-dark);margin:0}

.empty-state{text-align:center;padding:36px 12px 12px}
.empty-state i{font-size:44px;color:#BFD3E6}
.empty-state h2{font-size:24px;margin:18px 0 12px;padding-left:0}
.empty-state h2::before{display:none}
.empty-state p{color:var(--ink-2);font-size:15px;max-width:520px;margin:0 auto 24px}

/* ---------- related ---------- */
.related-section{padding:56px 0 8px}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:28px}
.section-head h2{font-size:clamp(22px,2.6vw,30px)}
.section-head .sub{color:var(--ink-2);font-size:15px;margin-top:10px;max-width:620px}
.lnk-more{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--primary)}
.lnk-more:hover{gap:10px;color:var(--primary-dark)}
.recommend-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.recommend-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--shadow);display:flex;flex-direction:column;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.recommend-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#CFE2F5}
.recommend-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.recommend-card .body{padding:20px 22px 24px;display:flex;flex-direction:column;flex:1}
.recommend-card h3{font-size:18px;margin:12px 0 10px}
.recommend-card p{font-size:14px;color:var(--ink-2);line-height:1.75;margin-bottom:18px;flex:1}
.recommend-card .lnk-more{font-size:14px}

/* ---------- cta ---------- */
.cta-section{padding:60px 0 24px}
.cta-panel{
  background:var(--primary-soft);border:1px solid #D6E7F8;border-radius:20px;
  padding:42px 44px;display:flex;align-items:center;justify-content:space-between;gap:32px;
}
.cta-panel h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:12px}
.cta-panel p{color:#2C4C6B;font-size:15px;max-width:560px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;flex-shrink:0}

/* ---------- footer ---------- */
.site-footer{background:#fff;border-top:1px solid var(--line);padding:56px 0 26px;margin-top:72px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:34px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--ink);margin-bottom:14px}
.footer-brand .brand-mark{width:32px;height:32px;font-size:15px}
.site-footer h4{font-size:15px;margin-bottom:16px;color:var(--ink)}
.site-footer p{font-size:14px;line-height:1.9;color:var(--ink-2)}
.footer-links li{margin-bottom:11px}
.footer-links a{font-size:14px;color:var(--ink-2)}
.footer-links a:hover{color:var(--primary)}
.footer-bottom{
  margin-top:38px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:var(--ink-3);
}

/* ---------- mobile tabbar ---------- */
.tabbar{display:none}
@media (max-width:767.98px){
  body{padding-bottom:82px}
  .tabbar{
    display:grid;grid-template-columns:repeat(4,1fr);
    position:fixed;left:0;right:0;bottom:0;z-index:1040;
    background:rgba(255,255,255,.97);backdrop-filter:blur(10px);
    border-top:1px solid var(--line);
    padding-bottom:env(safe-area-inset-bottom);
  }
  .tabbar a{
    height:60px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
    font-size:11px;color:var(--ink-2);
  }
  .tabbar a i{font-size:20px}
  .tabbar a.active,.tabbar a:hover{color:var(--primary)}
}

/* ---------- responsive ---------- */
@media (max-width:991.98px){
  .header-inner{min-height:70px;gap:14px}
  .nav-links a{padding:8px 11px;font-size:14px}
  .header-cta{display:none}
  .article-body{padding:34px 30px}
  .recommend-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:28px}
  .cta-panel{flex-direction:column;align-items:flex-start;padding:34px}
}
@media (max-width:767.98px){
  .nav-links{display:none}
  .article-hero{padding:26px 0 26px}
  .article-section{padding:36px 0 10px}
  .article-body{padding:26px 20px;border-radius:16px}
  .article-body h2{font-size:22px}
  .article-body h3{font-size:18px}
  .breadcrumb-nav .current{white-space:normal}
  .related-section{padding:40px 0 6px}
  .cta-section{padding:44px 0 16px}
  .cta-actions{width:100%}
  .cta-actions .btn-main,.cta-actions .btn-ghost{flex:1;min-height:48px}
  .site-footer{padding:44px 0 22px;margin-top:52px}
}
@media (max-width:575.98px){
  .wrap{padding:0 18px}
  .recommend-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .post-meta{gap:14px;font-size:13px}
  .footer-bottom{flex-direction:column}
}

/* roulang page: category1 */
:root{
  --brand:#1B6BB8;
  --brand-dark:#12538F;
  --brand-light:#E8F2FC;
  --accent:#18A999;
  --warm:#F2A33A;
  --bg:#F6F9FC;
  --surface:#FFFFFF;
  --border:#E2EAF2;
  --text:#102033;
  --muted:#5B6B7C;
  --faint:#8A99A8;
  --danger:#D9534F;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-input:12px;
  --radius-img:14px;
  --shadow-card:0 12px 28px rgba(17,54,90,.08);
  --shadow-hover:0 18px 40px rgba(17,54,90,.14);
  --wrap:1200px;
  --bs-primary:#1B6BB8;
  --bs-body-font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --bs-body-color:#102033;
  --bs-border-radius:12px;
  --bs-border-color:#E2EAF2;
  --bs-link-color:#1B6BB8;
  --bs-link-hover-color:#12538F;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .2s ease,opacity .2s ease;}
a:hover{color:var(--brand-dark);}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;color:var(--text);}
p{margin:0 0 12px;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:3px solid rgba(27,107,184,.28);outline-offset:2px;border-radius:6px;}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px;}
.section{padding:80px 0;}
.section-tight{padding:56px 0;}
.section-head{max-width:720px;margin-bottom:36px;}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--brand);background:var(--brand-light);
  padding:6px 14px;border-radius:999px;margin-bottom:14px;
}
.section-head h2{font-size:30px;margin-bottom:12px;}
.section-head p{color:var(--muted);font-size:16px;margin:0;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--border);
}
.header-inner{
  display:flex;align-items:center;gap:24px;
  min-height:76px;
}
.brand{
  display:flex;align-items:center;gap:10px;
  font-size:20px;font-weight:700;color:var(--text);letter-spacing:-.01em;
  white-space:nowrap;
}
.brand:hover{color:var(--text);}
.brand-mark{
  width:36px;height:36px;border-radius:11px;
  background:linear-gradient(140deg,var(--brand),var(--brand-dark));
  color:#fff;display:inline-flex;align-items:center;justify-content:center;
  font-size:16px;box-shadow:0 8px 18px rgba(27,107,184,.28);
}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-links a{
  display:inline-block;
  padding:10px 16px;border-radius:10px;
  color:var(--muted);font-size:15px;font-weight:500;
  position:relative;transition:background .2s ease,color .2s ease;
}
.nav-links a:hover{background:var(--brand-light);color:var(--brand-dark);}
.nav-links a.active{color:var(--brand);font-weight:600;background:var(--brand-light);}
.nav-links a.active::after{
  content:"";position:absolute;left:16px;right:16px;bottom:4px;height:2px;
  background:var(--brand);border-radius:2px;
}
.header-cta{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 20px;border-radius:var(--radius-btn);
  background:var(--brand);color:#fff;font-size:15px;font-weight:600;
  box-shadow:0 8px 18px rgba(27,107,184,.24);
  transition:background .2s ease,transform .2s ease,box-shadow .2s ease;
}
.header-cta:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);box-shadow:0 12px 24px rgba(18,83,143,.3);}

/* ---------- buttons ---------- */
.btn-brand,.btn-ghost,.btn-warm{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:12px 24px;border-radius:var(--radius-btn);
  font-size:16px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-brand{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(27,107,184,.22);}
.btn-brand:hover{background:var(--brand-dark);color:#fff;transform:translateY(-2px);box-shadow:0 14px 26px rgba(18,83,143,.28);}
.btn-brand:active{transform:translateY(0);}
.btn-ghost{background:#fff;color:var(--text);border-color:var(--border);box-shadow:0 6px 14px rgba(17,54,90,.05);}
.btn-ghost:hover{color:var(--brand);border-color:#BBD5EE;transform:translateY(-2px);box-shadow:0 12px 24px rgba(17,54,90,.1);}
.btn-warm{background:var(--warm);color:#3A2405;box-shadow:0 8px 18px rgba(242,163,58,.28);}
.btn-warm:hover{background:#E3942B;color:#3A2405;transform:translateY(-2px);}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font-weight:600;color:var(--brand);}
.link-arrow i{transition:transform .2s ease;}
.link-arrow:hover i{transform:translateX(4px);}

/* ---------- hero (category small hero) ---------- */
.cat-hero{
  position:relative;overflow:hidden;
  background-image:linear-gradient(105deg,rgba(246,249,252,.96) 0%,rgba(232,242,252,.9) 52%,rgba(246,249,252,.72) 100%),url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--border);
}
.cat-hero-inner{
  display:grid;grid-template-columns:1fr;gap:36px;
  padding:64px 0 68px;
}
.cat-hero h1{font-size:40px;margin-bottom:16px;letter-spacing:-.02em;}
.cat-hero .lead{font-size:17px;color:var(--muted);max-width:640px;margin-bottom:24px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px;}
.tag{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 14px;border-radius:999px;background:#fff;
  border:1px solid var(--border);font-size:13px;font-weight:600;color:var(--muted);
  box-shadow:0 4px 12px rgba(17,54,90,.05);
}
.tag i{color:var(--brand);font-size:12px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
.hero-figure{
  position:relative;border-radius:var(--radius-card);overflow:hidden;
  box-shadow:var(--shadow-card);border:1px solid var(--border);background:#fff;max-width:560px;
}
.hero-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.hero-figure .float-card{
  position:absolute;left:18px;bottom:18px;right:18px;
  background:rgba(255,255,255,.95);border-radius:12px;padding:12px 16px;
  display:flex;align-items:center;gap:10px;font-size:14px;font-weight:600;color:var(--text);
  box-shadow:0 10px 24px rgba(17,54,90,.14);
}
.hero-figure .float-card i{color:var(--accent);}

/* ---------- breadcrumb ---------- */
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:14px;color:var(--faint);padding:20px 0 0;
}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--brand);}
.crumb span.sep{color:#C6D3DF;}

/* ---------- layout with sticky toc ---------- */
.layout{
  display:grid;grid-template-columns:1fr;gap:32px;
  padding:40px 0 8px;
}
.toc{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
  padding:22px;box-shadow:var(--shadow-card);
}
.toc h2{font-size:16px;margin-bottom:14px;letter-spacing:.02em;}
.toc ol{counter-reset:toc;margin:0;padding:0;list-style:none;}
.toc ol li{counter-increment:toc;margin-bottom:6px;}
.toc ol li a{
  display:flex;gap:10px;align-items:flex-start;
  padding:8px 10px;border-radius:10px;color:var(--muted);font-size:14px;line-height:1.5;
}
.toc ol li a::before{
  content:counter(toc,decimal-leading-zero);
  font-size:12px;font-weight:700;color:var(--brand);
  background:var(--brand-light);border-radius:6px;padding:2px 6px;flex:none;margin-top:1px;
}
.toc ol li a:hover{background:var(--brand-light);color:var(--brand-dark);}
.toc .toc-cta{margin-top:16px;padding-top:16px;border-top:1px solid var(--border);}

/* ---------- content panels ---------- */
.panel{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-card);padding:26px;box-shadow:var(--shadow-card);
  margin-bottom:24px;
}
.panel h2{font-size:22px;margin-bottom:12px;padding-left:14px;border-left:4px solid var(--brand);}
.panel h3{font-size:18px;margin:20px 0 8px;}
.panel p{color:var(--muted);}
.panel p strong{color:var(--text);}

.media-block{
  display:grid;grid-template-columns:1fr;gap:22px;align-items:center;
}
.media-block img{
  width:100%;border-radius:var(--radius-img);aspect-ratio:4/3;object-fit:cover;
  border:1px solid var(--border);
}

/* steps */
.steps{display:grid;grid-template-columns:1fr;gap:18px;margin-top:8px;}
.step-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
  padding:22px;box-shadow:0 8px 20px rgba(17,54,90,.06);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  position:relative;
}
.step-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#CFE1F3;}
.step-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:12px;margin-bottom:14px;
  background:var(--brand-light);color:var(--brand);font-weight:700;font-size:15px;
}
.step-card h3{font-size:18px;margin-bottom:8px;}
.step-card p{margin:0;font-size:15px;color:var(--muted);}

/* info table */
.info-table{width:100%;border-collapse:separate;border-spacing:0;margin-top:6px;font-size:15px;}
.info-table caption{caption-side:top;text-align:left;color:var(--faint);font-size:13px;padding-bottom:10px;}
.info-table th,.info-table td{
  padding:14px 18px;border-bottom:1px solid var(--border);vertical-align:top;text-align:left;
}
.info-table thead th{
  background:var(--brand-light);color:var(--brand-dark);font-size:14px;font-weight:600;
  border-bottom:1px solid #D3E4F5;
}
.info-table thead th:first-child{border-top-left-radius:12px;}
.info-table thead th:last-child{border-top-right-radius:12px;}
.info-table tbody tr:hover{background:#FAFCFE;}
.info-table tbody tr:last-child td{border-bottom:none;}
.info-table td:first-child{font-weight:600;color:var(--text);width:34%;}
.info-table td{color:var(--muted);}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;}

/* checklist */
.checklist li{
  display:flex;gap:12px;align-items:flex-start;
  padding:12px 0;border-bottom:1px dashed var(--border);color:var(--muted);font-size:15px;
}
.checklist li:last-child{border-bottom:none;}
.checklist li i{color:var(--accent);margin-top:5px;font-size:14px;}
.checklist li b{color:var(--text);font-weight:600;}

/* callout */
.callout{
  display:flex;gap:14px;align-items:flex-start;
  background:var(--brand-light);border:1px solid #D3E4F5;border-radius:var(--radius-img);
  padding:18px 20px;margin-top:18px;
}
.callout i{color:var(--brand);font-size:18px;margin-top:4px;}
.callout p{margin:0;color:var(--brand-dark);font-size:15px;}
.callout.warn{background:#FFF6E8;border-color:#F6DDB6;}
.callout.warn i,.callout.warn p{color:#8A5A10;}

/* faq */
.accordion-item{
  border:1px solid var(--border);border-radius:14px !important;
  margin-bottom:12px;overflow:hidden;background:#fff;
}
.accordion-item:last-child{margin-bottom:0;}
.accordion-button{
  font-size:16px;font-weight:600;color:var(--text);
  padding:18px 20px;background:#fff;box-shadow:none;
}
.accordion-button:not(.collapsed){
  color:var(--brand-dark);background:#F5FAFF;
  box-shadow:inset 4px 0 0 var(--brand);
}
.accordion-button:focus{box-shadow:inset 4px 0 0 var(--brand),0 0 0 3px rgba(27,107,184,.18);}
.accordion-button::after{
  background-size:16px;width:16px;height:16px;
  filter:invert(35%) sepia(72%) saturate(1463%) hue-rotate(184deg) brightness(91%) contrast(88%);
}
.accordion-body{padding:4px 20px 20px;color:var(--muted);font-size:15px;}

/* cta */
.cta-panel{
  background:linear-gradient(120deg,#F2F8FE 0%,#E8F2FC 100%);
  border:1px solid #D3E4F5;border-radius:20px;padding:34px;
  box-shadow:var(--shadow-card);
}
.cta-panel h2{font-size:26px;margin-bottom:10px;}
.cta-panel p{color:var(--muted);max-width:560px;}
.form-label{font-size:14px;font-weight:600;color:var(--text);margin-bottom:6px;}
.form-control,.form-select{
  height:48px;border-radius:var(--radius-input);border:1px solid var(--border);
  background:#fff;color:var(--text);font-size:15px;padding:10px 14px;box-shadow:none;
}
textarea.form-control{height:auto;min-height:104px;}
.form-control:focus,.form-select:focus{
  border-color:var(--brand);box-shadow:0 0 0 3px rgba(27,107,184,.18);
}
.form-control::placeholder{color:var(--faint);}
.form-hint{font-size:13px;color:var(--faint);margin-top:8px;}
.form-note{font-size:13px;color:var(--accent);font-weight:600;margin-top:10px;}

/* footer */
.site-footer{background:#0F2A45;color:#C6D6E6;margin-top:72px;padding:56px 0 24px;font-size:15px;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;}
.footer-brand{
  display:flex;align-items:center;gap:10px;font-size:19px;font-weight:700;color:#fff;margin-bottom:14px;
}
.footer-brand .brand-mark{box-shadow:none;background:linear-gradient(140deg,#2A7FCB,#12538F);}
.site-footer p{color:#A9BED2;font-size:14px;line-height:1.8;}
.site-footer h4{font-size:16px;color:#fff;margin-bottom:14px;}
.footer-links li{margin-bottom:9px;}
.footer-links a{color:#A9BED2;font-size:14px;}
.footer-links a:hover{color:#fff;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);margin-top:36px;padding-top:20px;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:#8FA8BE;
}

/* mobile bottom tab */
.mobile-tab{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:1040;
  background:rgba(255,255,255,.97);
  border-top:1px solid var(--border);
  box-shadow:0 -8px 24px rgba(17,54,90,.08);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tab a{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  height:60px;color:var(--muted);font-size:11px;font-weight:500;
}
.mobile-tab a i{font-size:19px;}
.mobile-tab a.active{color:var(--brand);font-weight:700;}

@media (min-width:768px){
  .steps{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:repeat(2,1fr);}
}
@media (min-width:992px){
  .nav-links{margin-left:auto;}
  .cat-hero-inner{grid-template-columns:1.35fr .95fr;align-items:center;padding:76px 0 80px;}
  .layout{grid-template-columns:280px 1fr;gap:36px;align-items:start;}
  .toc{position:sticky;top:100px;}
  .steps{grid-template-columns:repeat(4,1fr);}
  .media-block{grid-template-columns:1.1fr .9fr;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.1fr;}
  .section{padding:88px 0;}
}
@media (max-width:991.98px){
  .nav-links{display:none;}
  .header-cta{display:none;}
  .header-inner{justify-content:flex-start;}
  .mobile-tab{display:flex;}
  body{padding-bottom:80px;}
}
@media (max-width:575.98px){
  .wrap{padding:0 18px;}
  .cat-hero h1{font-size:28px;line-height:1.3;}
  .cat-hero .lead{font-size:15px;}
  .section-head h2{font-size:24px;}
  .panel{padding:20px;border-radius:14px;}
  .panel h2{font-size:19px;}
  .cta-panel{padding:22px;border-radius:16px;}
  .cta-panel h2{font-size:22px;}
  .btn-brand,.btn-ghost,.btn-warm{width:100%;}
  .hero-actions{flex-direction:column;}
  .info-table td:first-child{width:42%;}
}

/* roulang page: category2 */
:root{
  --brand:#1B6BB8;
  --brand-dark:#12538F;
  --brand-light:#E8F2FC;
  --teal:#18A999;
  --teal-light:#E4F6F3;
  --amber:#F2A33A;
  --amber-light:#FDF3E3;
  --bg:#F6F9FC;
  --surface:#FFFFFF;
  --border:#E2EAF2;
  --text:#102033;
  --text-2:#5B6B7C;
  --text-3:#8A99A8;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-input:12px;
  --radius-img:14px;
  --shadow-sm:0 4px 12px rgba(17,54,90,.06);
  --shadow:0 12px 28px rgba(17,54,90,.08);
  --shadow-lg:0 18px 40px rgba(17,54,90,.14);
  --wrap:1200px;
  --section:88px;
  --bs-primary:#1B6BB8;
  --bs-body-color:#102033;
  --bs-body-font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --bs-border-radius:12px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
}
img{max-width:100%;display:block;border-radius:var(--radius-img);}
a{color:var(--brand);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand-dark);}
h1,h2,h3,h4{line-height:1.25;margin:0 0 14px;font-weight:700;letter-spacing:.2px;}
p{margin:0 0 14px;color:var(--text-2);}
ul{margin:0;padding:0;list-style:none;}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
:focus-visible{outline:3px solid rgba(27,107,184,.28);outline-offset:2px;}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px;}
.section{padding:var(--section) 0;}
.section--alt{background:var(--surface);}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:1.4px;text-transform:uppercase;
  color:var(--brand);font-weight:600;margin-bottom:12px;
}
.section-head h2{font-size:30px;}
.section-head p{margin:0;font-size:16px;}

/* 顶部导航 */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  min-height:76px;gap:24px;
}
.brand{display:inline-flex;align-items:center;gap:12px;color:var(--text);font-weight:700;}
.brand:hover{color:var(--text);}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-dark));
  color:#fff;font-size:17px;box-shadow:0 6px 14px rgba(27,107,184,.28);
}
.brand-text{font-size:19px;letter-spacing:.4px;}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-links a{
  display:inline-block;padding:9px 16px;border-radius:999px;
  font-size:15px;font-weight:500;color:var(--text-2);
}
.nav-links a:hover{background:var(--brand-light);color:var(--brand-dark);}
.nav-links a.active{background:var(--brand-light);color:var(--brand-dark);font-weight:600;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-btn);border:1px solid transparent;
  padding:12px 22px;font-size:15px;font-weight:600;line-height:1.4;
  cursor:pointer;transition:all .2s ease;min-height:46px;
}
.btn-brand{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(27,107,184,.22);}
.btn-brand:hover{background:var(--brand-dark);color:#fff;box-shadow:0 12px 24px rgba(18,83,143,.28);transform:translateY(-1px);}
.btn-ghost{background:#fff;border-color:var(--border);color:var(--brand-dark);}
.btn-ghost:hover{border-color:var(--brand);background:var(--brand-light);color:var(--brand-dark);}
.btn-amber{background:var(--amber);color:#fff;box-shadow:0 8px 18px rgba(242,163,58,.26);}
.btn-amber:hover{background:#dd8f24;color:#fff;}
.btn-arrow{
  display:inline-flex;align-items:center;gap:8px;font-weight:600;
  color:var(--brand);border:0;background:none;padding:0;
}
.btn-arrow i{transition:transform .2s ease;}
.btn-arrow:hover i{transform:translateX(4px);}
.header-cta{padding:11px 20px;min-height:44px;}

/* 面包屑 */
.crumb{background:var(--surface);border-bottom:1px solid var(--border);}
.crumb-inner{display:flex;align-items:center;gap:10px;padding:14px 0;font-size:14px;color:var(--text-3);}
.crumb-inner a{color:var(--text-2);}
.crumb-inner a:hover{color:var(--brand);}
.crumb-inner i{font-size:10px;color:var(--text-3);}

/* Hero */
.hero{padding:72px 0 64px;background:linear-gradient(180deg,#FFFFFF 0%,var(--bg) 100%);}
.hero-grid{display:grid;grid-template-columns:58fr 42fr;gap:56px;align-items:center;}
.hero h1{font-size:40px;margin-bottom:18px;}
.hero h1 .accent{color:var(--brand);}
.hero-sub{font-size:17px;max-width:560px;color:var(--text-2);}
.hero-sub span{display:block;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.chip{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 14px;border-radius:999px;background:var(--brand-light);
  color:var(--brand-dark);font-size:13px;font-weight:600;
}
.chip--teal{background:var(--teal-light);color:#0f7a6f;}
.chip--amber{background:var(--amber-light);color:#9a641a;}
.hero-figure{position:relative;}
.hero-figure img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  box-shadow:var(--shadow-lg);
}
.hero-badge{
  position:absolute;left:20px;bottom:20px;z-index:2;
  background:rgba(255,255,255,.94);border-radius:14px;
  padding:14px 18px;box-shadow:var(--shadow);border:1px solid var(--border);
  display:flex;align-items:center;gap:12px;max-width:calc(100% - 40px);
}
.hero-badge i{color:var(--teal);font-size:20px;}
.hero-badge b{display:block;font-size:15px;color:var(--text);line-height:1.4;}
.hero-badge em{font-style:normal;font-size:13px;color:var(--text-3);}

/* 数据条 */
.stats{background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:36px 0;}
.stat-item{display:flex;gap:14px;align-items:flex-start;}
.stat-icon{
  width:44px;height:44px;flex:0 0 44px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-light);color:var(--brand);font-size:18px;
}
.stat-item strong{display:block;font-size:22px;color:var(--text);line-height:1.3;}
.stat-item span{font-size:14px;color:var(--text-3);}

/* 时间线 */
.timeline{margin-top:8px;}
.tl-item{position:relative;display:grid;grid-template-columns:76px 1fr;gap:24px;padding-bottom:32px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item:not(:last-child)::before{
  content:"";position:absolute;left:37px;top:78px;bottom:6px;width:2px;
  background:linear-gradient(180deg,#CFE3F7,#E8F2FC);
}
.tl-num{
  width:76px;height:76px;border-radius:20px;background:var(--surface);
  border:1px solid var(--border);box-shadow:var(--shadow-sm);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  color:var(--brand);font-weight:700;
}
.tl-num b{font-size:20px;line-height:1;}
.tl-num em{font-style:normal;font-size:11px;color:var(--text-3);margin-top:4px;}
.tl-body{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-card);padding:24px 26px;
  box-shadow:var(--shadow-sm);transition:box-shadow .25s ease,transform .25s ease;
}
.tl-body:hover{box-shadow:var(--shadow);transform:translateY(-2px);}
.tl-body h3{font-size:20px;margin-bottom:10px;display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.tl-body h3 .tag{
  font-size:12px;font-weight:600;color:var(--brand-dark);
  background:var(--brand-light);border-radius:999px;padding:4px 10px;
}
.tl-body p{margin:0 0 10px;font-size:15px;}
.tl-check{
  display:flex;gap:10px;align-items:flex-start;font-size:14px;
  color:#0f7a6f;background:var(--teal-light);border-radius:12px;padding:12px 14px;
}
.tl-check i{margin-top:3px;}

/* 注意项清单 */
.notes-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.note-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-card);padding:24px;box-shadow:var(--shadow-sm);
  transition:box-shadow .25s ease,transform .25s ease;height:100%;
}
.note-card:hover{box-shadow:var(--shadow);transform:translateY(-3px);}
.note-card i{font-size:20px;color:var(--amber);margin-bottom:14px;display:block;}
.note-card h3{font-size:17px;margin-bottom:8px;}
.note-card p{margin:0;font-size:14px;}
.compare{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:34px;}
.compare-card{border-radius:var(--radius-card);padding:26px;border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow-sm);}
.compare-card.good{border-left:4px solid var(--teal);}
.compare-card.bad{border-left:4px solid var(--amber);}
.compare-card h3{font-size:18px;display:flex;align-items:center;gap:10px;}
.compare-card h3 i{font-size:16px;}
.compare-card.good h3 i{color:var(--teal);}
.compare-card.bad h3 i{color:var(--amber);}
.compare-card ul li{
  position:relative;padding-left:22px;margin-bottom:10px;font-size:14.5px;color:var(--text-2);
}
.compare-card ul li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;
  background:var(--brand-light);
}
.compare-card.good ul li::before{background:var(--teal);}
.compare-card.bad ul li::before{background:var(--amber);}

/* 案例 */
.case-grid{display:grid;grid-template-columns:1.35fr .95fr;gap:26px;align-items:stretch;}
.case-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;
  transition:box-shadow .25s ease,transform .25s ease;
}
.case-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px);}
.case-card img{width:100%;border-radius:0;object-fit:cover;}
.case-card.large img{aspect-ratio:16/9;}
.case-card.small img{aspect-ratio:16/10;}
.case-body{padding:24px 26px 26px;}
.case-tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px;}
.case-body h3{font-size:20px;margin-bottom:10px;}
.case-body p{font-size:14.5px;}
.case-figure{display:flex;flex-wrap:wrap;gap:22px;margin-top:16px;padding-top:16px;border-top:1px dashed var(--border);}
.case-figure div strong{display:block;font-size:19px;color:var(--brand);line-height:1.3;}
.case-figure div span{font-size:13px;color:var(--text-3);}

/* 操作答疑 */
.faq-grid{display:grid;grid-template-columns:5fr 7fr;gap:44px;align-items:start;}
.faq-side h2{font-size:28px;}
.faq-side p{font-size:15.5px;}
.faq-side .btn{margin-top:10px;}
.accordion-item{
  border:1px solid var(--border)!important;border-radius:14px!important;
  margin-bottom:14px;overflow:hidden;background:var(--surface);box-shadow:var(--shadow-sm);
}
.accordion-button{
  font-size:16.5px;font-weight:600;color:var(--text);background:var(--surface);
  padding:18px 22px;border:0;box-shadow:none!important;
}
.accordion-button:not(.collapsed){color:var(--brand-dark);background:var(--brand-light);}
.accordion-button::after{
  background-image:none;content:"\f107";font-family:"Font Awesome 6 Free";font-weight:900;
  width:auto;height:auto;font-size:15px;color:var(--brand);transform:none;transition:transform .2s ease;
}
.accordion-button:not(.collapsed)::after{transform:rotate(180deg);}
.accordion-body{padding:4px 22px 20px;font-size:15px;color:var(--text-2);border-top:1px solid var(--border);}
.accordion-body p:last-child{margin-bottom:0;}

/* CTA 面板 */
.cta-panel{
  background:linear-gradient(135deg,#E8F2FC 0%,#F6F9FC 55%,#FFFFFF 100%);
  border:1px solid var(--border);border-radius:22px;padding:52px;
  display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;
  position:relative;overflow:hidden;
}
.cta-panel::after{
  content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;
  background:radial-gradient(circle,rgba(27,107,184,.14),rgba(27,107,184,0));
}
.cta-copy h2{font-size:30px;}
.cta-copy p{font-size:15.5px;max-width:460px;}
.cta-list li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--text-2);margin-bottom:10px;}
.cta-list i{color:var(--teal);margin-top:4px;}
.form-card{
  background:var(--surface);border:1px solid var(--border);border-radius:18px;
  padding:28px;box-shadow:var(--shadow);position:relative;z-index:2;
}
.form-row{margin-bottom:16px;}
.form-row label{display:block;font-size:14px;font-weight:600;color:var(--text);margin-bottom:8px;}
.form-control,.form-select{
  height:48px;border-radius:var(--radius-input);border:1px solid var(--border);
  font-size:15px;color:var(--text);background:#fff;padding:0 14px;width:100%;
}
.form-control::placeholder{color:var(--text-3);}
.form-control:focus,.form-select:focus{
  border-color:var(--brand);box-shadow:0 0 0 3px rgba(27,107,184,.16);outline:none;
}
.form-hint{font-size:13px;color:var(--text-3);margin:12px 0 0;}
.form-card .btn{width:100%;height:48px;}

/* 页脚 */
.site-footer{background:#0F1F2E;color:#C7D4E2;padding:64px 0 28px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;}
.footer-brand{
  display:flex;align-items:center;gap:12px;font-size:19px;font-weight:700;color:#fff;margin-bottom:14px;
}
.footer-brand .brand-mark{background:linear-gradient(135deg,#2C86D8,#1B6BB8);}
.site-footer p{color:#9FB2C4;font-size:14px;line-height:1.8;}
.site-footer h4{font-size:15px;color:#fff;margin-bottom:16px;letter-spacing:.5px;}
.footer-links li{margin-bottom:10px;}
.footer-links a{color:#9FB2C4;font-size:14px;}
.footer-links a:hover{color:#fff;}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.12);margin-top:44px;padding-top:22px;
  font-size:13px;color:#8296A8;
}

/* 移动端底部 Tab */
.mobile-tab{
  position:fixed;left:0;right:0;bottom:0;z-index:1100;
  display:none;background:rgba(255,255,255,.96);
  backdrop-filter:blur(10px);border-top:1px solid var(--border);
  padding:6px 4px calc(6px + env(safe-area-inset-bottom));
  box-shadow:0 -6px 18px rgba(17,54,90,.07);
}
.mobile-tab a{
  flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;
  font-size:11.5px;color:var(--text-3);padding:6px 2px;border-radius:12px;
}
.mobile-tab a i{font-size:19px;}
.mobile-tab a.active{color:var(--brand);font-weight:600;background:var(--brand-light);}

/* 响应式 */
@media (max-width:1199px){
  .hero h1{font-size:36px;}
}
@media (max-width:991px){
  :root{--section:64px;}
  .nav-links{display:none;}
  .header-cta{display:none;}
  .hero{padding:48px 0 44px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero h1{font-size:32px;}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:20px;padding:28px 0;}
  .notes-grid{grid-template-columns:repeat(2,1fr);}
  .case-grid{grid-template-columns:1fr;}
  .faq-grid{grid-template-columns:1fr;gap:28px;}
  .cta-panel{grid-template-columns:1fr;padding:36px;gap:28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767px){
  body{padding-bottom:78px;}
  .wrap{padding:0 18px;}
  :root{--section:52px;}
  .header-inner{min-height:64px;}
  .brand-text{font-size:17px;}
  .brand-mark{width:36px;height:36px;flex:0 0 36px;border-radius:11px;font-size:15px;}
  .hero h1{font-size:27px;}
  .hero-sub{font-size:15.5px;}
  .hero-actions .btn{width:100%;height:48px;}
  .section-head h2{font-size:24px;}
  .tl-item{grid-template-columns:58px 1fr;gap:14px;padding-bottom:24px;}
  .tl-item:not(:last-child)::before{left:28px;top:60px;}
  .tl-num{width:58px;height:58px;border-radius:16px;}
  .tl-num b{font-size:17px;}
  .tl-body{padding:20px;}
  .tl-body h3{font-size:18px;}
  .notes-grid{grid-template-columns:1fr;}
  .compare{grid-template-columns:1fr;}
  .cta-panel{padding:28px 20px;border-radius:18px;}
  .cta-copy h2{font-size:23px;}
  .form-card{padding:22px 18px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .mobile-tab{display:flex;}
}
@media (max-width:520px){
  .stats-grid{grid-template-columns:1fr;}
  .hero-badge{left:12px;bottom:12px;padding:12px 14px;}
  .hero h1{font-size:24px;}
}

/* roulang page: category3 */
:root{
  --bs-primary:#1B6BB8;
  --bs-primary-rgb:27,107,184;
  --bs-body-font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --bs-body-color:#102033;
  --bs-border-radius:12px;
  --brand:#1B6BB8;
  --brand-dark:#12538F;
  --brand-light:#E8F2FC;
  --accent:#18A999;
  --warm:#F2A33A;
  --bg:#F6F9FC;
  --surface:#FFFFFF;
  --ink:#102033;
  --muted:#5B6B7C;
  --faint:#8A99A8;
  --line:#E2EAF2;
  --danger:#D9534F;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-input:12px;
  --radius-img:14px;
  --shadow-sm:0 6px 18px rgba(17,54,90,.06);
  --shadow:0 12px 28px rgba(17,54,90,.08);
  --shadow-lg:0 18px 40px rgba(17,54,90,.14);
  --max:1200px;
  --nav-h:76px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:96px;}
body{
  margin:0;
  font-family:var(--bs-body-font-family);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand-dark);}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:3px solid rgba(27,107,184,.28);
  outline-offset:2px;
  border-radius:8px;
}
h1,h2,h3,h4{font-weight:700;line-height:1.25;letter-spacing:.2px;margin:0;color:var(--ink);}
h1{font-size:40px;}
h2{font-size:30px;}
h3{font-size:22px;}
p{margin:0 0 14px;}
ul{margin:0;padding:0;list-style:none;}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px;}
@media(min-width:1400px){.wrap{max-width:1280px;}}
.section{padding:88px 0;}
.section-tight{padding:64px 0;}
.section-alt{background:var(--surface);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.6px;
  color:var(--brand-dark);background:var(--brand-light);
  padding:6px 14px;border-radius:999px;margin-bottom:16px;
}
.section-head{max-width:720px;margin-bottom:40px;}
.section-head p{color:var(--muted);font-size:16px;margin-top:12px;margin-bottom:0;}
.lead{color:var(--muted);font-size:17px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  height:var(--nav-h);
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  font-size:19px;font-weight:700;color:var(--ink);letter-spacing:.3px;
}
.brand:hover{color:var(--brand-dark);}
.brand-mark{
  width:36px;height:36px;border-radius:11px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-dark));
  color:#fff;font-size:16px;box-shadow:0 6px 14px rgba(27,107,184,.28);
}
.nav-links{display:flex;align-items:center;gap:4px;}
.nav-links a{
  position:relative;
  padding:10px 16px;border-radius:10px;
  font-size:15px;font-weight:500;color:var(--muted);
  transition:background .2s ease,color .2s ease;
}
.nav-links a::after{
  content:"";position:absolute;left:16px;right:16px;bottom:4px;height:2px;
  background:var(--brand);border-radius:2px;transform:scaleX(0);
  transition:transform .22s ease;
}
.nav-links a:hover{background:var(--brand-light);color:var(--brand-dark);}
.nav-links a.active{color:var(--brand-dark);font-weight:600;background:var(--brand-light);}
.nav-links a.active::after{transform:scaleX(1);}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--radius-btn);
  background:var(--brand);color:#fff;font-size:15px;font-weight:600;
  box-shadow:0 8px 18px rgba(27,107,184,.24);
  transition:background .2s ease,transform .2s ease,box-shadow .2s ease;
  white-space:nowrap;
}
.nav-cta:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);box-shadow:0 12px 24px rgba(18,83,143,.28);}

/* ---------- 按钮 ---------- */
.btn-brand,.btn-ghost,.btn-warm{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:background .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.btn-brand{background:var(--brand);color:#fff;box-shadow:0 10px 22px rgba(27,107,184,.22);}
.btn-brand:hover{background:var(--brand-dark);color:#fff;transform:translateY(-2px);box-shadow:0 14px 28px rgba(18,83,143,.26);}
.btn-warm{background:var(--warm);color:#3a2405;box-shadow:0 10px 22px rgba(242,163,58,.28);}
.btn-warm:hover{background:#e0901f;color:#3a2405;transform:translateY(-2px);}
.btn-ghost{background:#fff;color:var(--brand-dark);border-color:var(--line);box-shadow:var(--shadow-sm);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-dark);transform:translateY(-2px);box-shadow:var(--shadow);}
.btn-brand:active,.btn-ghost:active,.btn-warm:active{transform:translateY(0);}
.link-more{
  display:inline-flex;align-items:center;gap:8px;
  font-size:15px;font-weight:600;color:var(--brand-dark);
}
.link-more i{transition:transform .2s ease;}
.link-more:hover i{transform:translateX(4px);}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,#F2F8FE 0%,#F6F9FC 100%);
  border-bottom:1px solid var(--line);
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  opacity:.16;pointer-events:none;
}
.hero-inner{
  position:relative;
  display:grid;grid-template-columns:1.15fr .85fr;gap:48px;
  align-items:center;padding:72px 0 80px;
}
.hero h1{font-size:40px;margin-bottom:18px;}
.hero h1 span{color:var(--brand-dark);}
.hero .lead{font-size:17px;max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:999px;
  font-size:13px;font-weight:600;
  background:#fff;border:1px solid var(--line);color:var(--muted);
}
.tag i{color:var(--accent);font-size:12px;}
.hero-media{
  position:relative;border-radius:var(--radius-card);overflow:hidden;
  box-shadow:var(--shadow-lg);border:1px solid #fff;
  background:#fff;
}
.hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.hero-media-badge{
  position:absolute;left:16px;bottom:16px;
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;border-radius:999px;
  background:rgba(255,255,255,.92);color:var(--brand-dark);
  font-size:13px;font-weight:600;box-shadow:var(--shadow-sm);
}

/* ---------- 速查数据条 ---------- */
.facts{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:-44px;position:relative;z-index:2;}
.fact-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow);
}
.fact-card .num{font-size:28px;font-weight:700;color:var(--brand-dark);line-height:1.2;}
.fact-card .label{font-size:14px;color:var(--muted);margin-top:6px;}
.fact-card .desc{font-size:14px;color:var(--faint);margin-top:10px;}

/* ---------- 主区：目录 + 内容 ---------- */
.layout-faq{display:grid;grid-template-columns:280px 1fr;gap:40px;align-items:start;}
.toc{
  position:sticky;top:calc(var(--nav-h) + 24px);
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:22px;box-shadow:var(--shadow-sm);
}
.toc h3{font-size:15px;letter-spacing:.6px;color:var(--faint);text-transform:none;margin-bottom:14px;font-weight:600;}
.toc ol{counter-reset:toc;display:flex;flex-direction:column;gap:6px;}
.toc li{counter-increment:toc;}
.toc a{
  display:flex;gap:10px;align-items:flex-start;
  padding:9px 12px;border-radius:10px;
  font-size:14px;color:var(--muted);line-height:1.5;
  transition:background .2s ease,color .2s ease;
}
.toc a::before{
  content:counter(toc,decimal-leading-zero);
  font-size:12px;font-weight:700;color:var(--faint);padding-top:2px;
}
.toc a:hover{background:var(--brand-light);color:var(--brand-dark);}
.toc a:hover::before{color:var(--brand);}
.toc-note{
  margin-top:18px;padding-top:16px;border-top:1px dashed var(--line);
  font-size:13px;color:var(--faint);line-height:1.6;
}
.faq-block{margin-bottom:56px;}
.faq-block:last-child{margin-bottom:0;}
.faq-block > h2{font-size:26px;display:flex;align-items:center;gap:12px;}
.faq-block > h2 i{color:var(--brand);font-size:20px;}
.faq-block > .block-desc{color:var(--muted);font-size:15px;margin:10px 0 22px;}

.accordion-item{
  border:1px solid var(--line);border-radius:14px !important;
  overflow:hidden;margin-bottom:14px;background:#fff;
  box-shadow:var(--shadow-sm);
  transition:box-shadow .2s ease,transform .2s ease;
}
.accordion-item:hover{box-shadow:var(--shadow);transform:translateY(-2px);}
.accordion-button{
  font-size:16px;font-weight:600;color:var(--ink);
  background:#fff;padding:20px 22px;border:0;
  box-shadow:none !important;
  border-left:4px solid transparent;
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.accordion-button:not(.collapsed){
  color:var(--brand-dark);background:var(--brand-light);
  border-left-color:var(--brand);
}
.accordion-button::after{
  width:16px;height:16px;background-size:16px;
  filter:invert(33%) sepia(72%) saturate(1600%) hue-rotate(186deg) brightness(92%) contrast(90%);
}
.accordion-body{
  padding:4px 22px 22px;font-size:15px;color:var(--muted);line-height:1.8;
  border-left:4px solid transparent;
}
.accordion-button:not(.collapsed) + .accordion-body{border-left-color:var(--brand-light);}
.accordion-body ul{margin-top:10px;display:flex;flex-direction:column;gap:8px;}
.accordion-body li{position:relative;padding-left:20px;}
.accordion-body li::before{
  content:"";position:absolute;left:0;top:11px;
  width:7px;height:7px;border-radius:50%;background:var(--accent);
}
.accordion-body strong{color:var(--ink);}

/* ---------- 对比卡 ---------- */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.compare-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px;box-shadow:var(--shadow-sm);
}
.compare-card.wrong{border-top:4px solid var(--danger);}
.compare-card.right{border-top:4px solid var(--accent);}
.compare-card h3{font-size:18px;display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.compare-card.wrong h3 i{color:var(--danger);}
.compare-card.right h3 i{color:var(--accent);}
.compare-card ul{display:flex;flex-direction:column;gap:12px;}
.compare-card li{
  font-size:15px;color:var(--muted);line-height:1.7;
  padding-left:22px;position:relative;
}
.compare-card li::before{
  content:"\f00c";font-family:"Font Awesome 6 Free";font-weight:900;
  position:absolute;left:0;top:1px;font-size:12px;color:var(--accent);
}
.compare-card.wrong li::before{content:"\f00d";color:var(--danger);}

/* ---------- 案例 ---------- */
.case-card{
  display:grid;grid-template-columns:1fr 1fr;gap:0;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow);
}
.case-card img{width:100%;height:100%;min-height:280px;object-fit:cover;}
.case-body{padding:34px;}
.case-body h3{font-size:22px;margin-bottom:12px;}
.case-body p{color:var(--muted);font-size:15px;}
.case-stats{display:flex;gap:28px;margin-top:22px;flex-wrap:wrap;}
.case-stats .stat .v{font-size:24px;font-weight:700;color:var(--brand-dark);}
.case-stats .stat .k{font-size:13px;color:var(--faint);}
.pill-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px;}
.pill{
  font-size:12px;font-weight:600;padding:5px 12px;border-radius:999px;
  background:var(--brand-light);color:var(--brand-dark);
}
.pill.accent{background:rgba(24,169,153,.12);color:#0E7A6E;}

/* ---------- 表单 ---------- */
.contact-panel{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:34px;box-shadow:var(--shadow);
}
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:40px;align-items:start;}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.field{margin-bottom:18px;}
.field label{display:block;font-size:14px;font-weight:600;color:var(--ink);margin-bottom:8px;}
.field .hint{font-size:13px;color:var(--faint);margin-top:6px;}
.field input,.field select,.field textarea{
  width:100%;height:48px;padding:0 14px;
  border:1px solid var(--line);border-radius:var(--radius-input);
  font-size:15px;color:var(--ink);background:#FDFEFF;
  font-family:inherit;transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.field textarea{height:auto;min-height:112px;padding:12px 14px;line-height:1.7;resize:vertical;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);background:#fff;
  box-shadow:0 0 0 3px rgba(27,107,184,.16);
}
.form-note{font-size:13px;color:var(--faint);margin-top:14px;}
.contact-side .info-item{
  display:flex;gap:14px;padding:16px 0;border-bottom:1px dashed var(--line);
}
.contact-side .info-item:last-child{border-bottom:0;}
.contact-side .info-item i{
  width:38px;height:38px;flex:0 0 38px;border-radius:11px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand-light);color:var(--brand-dark);font-size:15px;
}
.contact-side .info-item h4{font-size:15px;margin-bottom:4px;}
.contact-side .info-item p{font-size:14px;color:var(--muted);margin:0;}

/* ---------- 相关入口 ---------- */
.entry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.entry-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.entry-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#D5E4F4;}
.entry-card img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.entry-card .body{padding:22px;display:flex;flex-direction:column;flex:1;}
.entry-card h3{font-size:18px;margin-bottom:10px;}
.entry-card p{font-size:14px;color:var(--muted);flex:1;}
.entry-card .link-more{margin-top:8px;}

/* ---------- CTA 面板 ---------- */
.cta-panel{
  background:linear-gradient(135deg,#E8F2FC 0%,#F6F9FC 100%);
  border:1px solid #D6E6F8;border-radius:20px;
  padding:52px;display:grid;grid-template-columns:1.3fr .7fr;gap:36px;align-items:center;
}
.cta-panel h2{font-size:30px;margin-bottom:14px;}
.cta-panel p{color:var(--muted);margin-bottom:0;max-width:560px;}
.cta-actions{display:flex;flex-direction:column;gap:14px;}
.cta-actions .btn-brand,.cta-actions .btn-ghost{width:100%;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:#0E2A45;color:#C8D8E8;padding:64px 0 28px;margin-top:0;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;}
.site-footer h4{font-size:15px;color:#fff;margin-bottom:16px;letter-spacing:.4px;}
.site-footer p{font-size:14px;color:#9DB5CC;line-height:1.8;}
.footer-brand{
  display:flex;align-items:center;gap:10px;
  font-size:18px;font-weight:700;color:#fff;margin-bottom:14px;
}
.footer-brand .brand-mark{background:linear-gradient(135deg,#2E8BD8,#12538F);box-shadow:none;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:14px;color:#9DB5CC;}
.footer-links a:hover{color:#fff;}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#8AA3BC;
}

/* ---------- 移动底部 Tab ---------- */
.mobile-tab{display:none;}
@media(max-width:767.98px){
  body{padding-bottom:80px;}
  .mobile-tab{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:1040;
    height:60px;background:rgba(255,255,255,.96);
    backdrop-filter:blur(12px);
    border-top:1px solid var(--line);
    padding-bottom:env(safe-area-inset-bottom);
    box-shadow:0 -8px 24px rgba(17,54,90,.08);
  }
  .mobile-tab a{
    flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
    font-size:11px;color:var(--faint);letter-spacing:.2px;
  }
  .mobile-tab a i{font-size:18px;}
  .mobile-tab a.active{color:var(--brand);font-weight:600;}
}

/* ---------- 响应式 ---------- */
@media(max-width:1199.98px){
  .nav-links a{padding:10px 12px;font-size:14px;}
}
@media(max-width:991.98px){
  h1,.hero h1{font-size:32px;}
  h2{font-size:26px;}
  .section{padding:64px 0;}
  .hero-inner{grid-template-columns:1fr;gap:32px;padding:52px 0 96px;}
  .hero .lead{max-width:none;}
  .facts{grid-template-columns:1fr;margin-top:-64px;gap:16px;}
  .layout-faq{grid-template-columns:1fr;gap:28px;}
  .toc{position:static;}
  .toc ol{flex-direction:row;flex-wrap:wrap;gap:8px;}
  .toc li{flex:1 1 46%;}
  .compare{grid-template-columns:1fr;}
  .case-card{grid-template-columns:1fr;}
  .case-card img{min-height:220px;}
  .contact-grid{grid-template-columns:1fr;gap:28px;}
  .entry-grid{grid-template-columns:1fr 1fr;}
  .cta-panel{grid-template-columns:1fr;padding:38px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media(max-width:767.98px){
  .wrap{padding:0 18px;}
  .nav-links,.nav-cta{display:none;}
  .section{padding:52px 0;}
  .hero-inner{padding:40px 0 88px;}
  h1,.hero h1{font-size:28px;line-height:1.3;}
  h2{font-size:24px;}
  h3{font-size:20px;}
  .entry-grid{grid-template-columns:1fr;}
  .form-row{grid-template-columns:1fr;}
  .contact-panel{padding:24px;}
  .cta-panel{padding:28px;border-radius:16px;}
  .btn-brand,.btn-ghost,.btn-warm{width:100%;}
  .hero-actions{flex-direction:column;}
  .hero-actions .btn-brand,.hero-actions .btn-ghost{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .toc li{flex:1 1 100%;}
}