/* roulang page: index */
:root{
  --c-primary:#1B5FA8;
  --c-primary-700:#14498A;
  --c-primary-100:#E7F0FA;
  --c-accent:#FF6B2C;
  --c-accent-700:#E2541A;
  --c-accent-100:#FFF0E7;
  --c-success:#12A06A;
  --c-danger:#D93F3F;
  --c-ink:#12233A;
  --c-body:#4A5A6E;
  --c-muted:#8A99AB;
  --c-bg:#F4F7FB;
  --c-surface:#FFFFFF;
  --c-line:#E2EAF3;
  --shadow-1:0 1px 2px rgba(18,35,58,.04),0 8px 24px rgba(18,35,58,.06);
  --shadow-2:0 2px 4px rgba(18,35,58,.06),0 16px 36px rgba(18,35,58,.10);
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --sp-section:88px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.85;color:var(--c-body);background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--c-ink);font-weight:700;line-height:1.35}
h1{font-size:clamp(30px,4vw,48px);line-height:1.25}
h2{font-size:30px}
h3{font-size:20px;font-weight:600}
p{margin:0}
a{color:var(--c-primary);text-decoration:none}
img{max-width:100%;display:block;border-radius:var(--r-img)}
ul,ol{margin:0;padding:0;list-style:none}
button,input,select,textarea{font:inherit;color:inherit}
svg{display:block}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1.5px solid transparent;border-radius:var(--r-btn);font-weight:600;font-size:15px;
  cursor:pointer;text-align:center;white-space:nowrap;background:none;
  transition:transform .18s ease,background-color .18s ease,color .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.btn-lg{height:48px;padding:0 24px}
.btn-md{height:40px;padding:0 18px}
.btn-sm{height:32px;padding:0 14px;font-size:14px}
.btn-primary{background:var(--c-primary);color:#fff}
.btn-primary:hover{background:var(--c-primary-700);transform:translateY(-1px);box-shadow:var(--shadow-1)}
.btn-accent{background:var(--c-accent);color:#fff}
.btn-accent:hover{background:var(--c-accent-700);transform:translateY(-1px);box-shadow:var(--shadow-1)}
.btn-outline{background:transparent;border-color:var(--c-primary);color:var(--c-primary)}
.btn-outline:hover{background:var(--c-primary-100);transform:translateY(-1px)}
.btn-block{width:100%}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--c-primary);transition:gap .18s ease,color .18s ease}
.text-link:hover{gap:10px;color:var(--c-primary-700)}

/* 徽章 */
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);font-size:12px;line-height:1;font-weight:600}
.badge-primary{background:var(--c-primary-100);color:var(--c-primary-700)}
.badge-accent{background:var(--c-accent-100);color:var(--c-accent-700)}
.badge-success{background:#E6F6EF;color:var(--c-success)}

/* 公告条 */
.announce{background:var(--c-accent-100);color:var(--c-primary-700);font-size:14px}
.announce-inner{display:flex;align-items:center;gap:10px;min-height:32px;padding-top:5px;padding-bottom:5px}
.announce-dot{width:7px;height:7px;border-radius:50%;background:var(--c-accent);flex:0 0 7px}
.announce p{flex:1;margin:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.announce-close{background:none;border:0;cursor:pointer;font-size:18px;line-height:1;color:var(--c-primary-700);padding:0 4px;border-radius:6px}
.announce-close:hover{background:rgba(27,95,168,.10)}
.announce.is-hidden{display:none}

/* 导航 */
.site-header{position:sticky;top:0;z-index:80;background:var(--c-surface);border-bottom:1px solid var(--c-line);transition:box-shadow .2s ease}
.site-header.is-stuck{box-shadow:var(--shadow-1)}
.header-inner{display:flex;align-items:center;gap:18px;height:64px}
.nav-left{display:flex;align-items:center;gap:26px;flex:1 1 60%;min-width:0}
.logo{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--c-ink);letter-spacing:.2px;flex:0 0 auto}
.logo-mark{width:34px;height:34px;flex:0 0 34px}
.logo-text em{font-style:normal;color:var(--c-primary)}
.main-nav{display:flex;align-items:center;gap:2px;min-width:0}
.main-nav a{position:relative;display:inline-block;padding:8px 12px;border-radius:8px;font-size:15px;font-weight:500;color:var(--c-body);transition:color .18s ease,background-color .18s ease}
.main-nav a:hover{color:var(--c-primary);background:var(--c-primary-100)}
.main-nav a.active{color:var(--c-primary);font-weight:600}
.main-nav a.active::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:var(--c-primary)}
.nav-divider{width:1px;height:22px;background:var(--c-line);flex:0 0 1px}
.nav-right{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.search{display:flex;align-items:center;gap:6px;height:38px;padding:0 12px;border:1px solid var(--c-line);border-radius:var(--r-pill);background:var(--c-bg);transition:border-color .18s ease,box-shadow .18s ease}
.search input{border:0;background:transparent;outline:0;width:118px;font-size:14px;color:var(--c-ink)}
.search input::placeholder{color:var(--c-muted)}
.search:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 3px var(--c-primary-100)}
.hamburger{display:none;width:40px;height:40px;align-items:center;justify-content:center;border:1px solid var(--c-line);border-radius:var(--r-btn);background:#fff;cursor:pointer}
.hamburger span{display:block;width:18px;height:2px;background:var(--c-ink);border-radius:2px;position:relative}
.hamburger span::before,.hamburger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-ink);border-radius:2px}
.hamburger span::before{top:-6px}
.hamburger span::after{top:6px}
.drawer{position:fixed;inset:0;background:#fff;z-index:120;display:none;flex-direction:column;padding:18px 20px 24px;overflow-y:auto}
.drawer.open{display:flex}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-close{width:40px;height:40px;border:1px solid var(--c-line);border-radius:var(--r-btn);background:#fff;font-size:20px;line-height:1;cursor:pointer;color:var(--c-ink)}
.drawer nav{display:flex;flex-direction:column;gap:4px}
.drawer nav a{padding:14px 12px;border-radius:var(--r-btn);font-size:16px;color:var(--c-ink);font-weight:500;border-bottom:1px solid var(--c-line)}
.drawer nav a.active{color:var(--c-primary);background:var(--c-primary-100);border-bottom-color:transparent}
.drawer-foot{margin-top:auto;padding-top:20px}

/* Hero */
.hero{position:relative;background:var(--c-surface);border-bottom:1px solid var(--c-line);overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background-image:repeating-linear-gradient(135deg,rgba(27,95,168,.045) 0 1px,transparent 1px 14px);pointer-events:none}
.hero-grid{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;min-height:560px;padding-top:64px;padding-bottom:64px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;height:28px;padding:0 12px;border-radius:var(--r-pill);background:var(--c-primary-100);color:var(--c-primary-700);font-size:13px;font-weight:600;margin-bottom:18px}
.hero-copy h1{margin-bottom:16px}
.hero-sub{font-size:17px;line-height:1.85;color:var(--c-body);max-width:520px;margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:28px}
.hero-trust{display:flex;flex-wrap:wrap;gap:18px;font-size:14px;color:var(--c-body)}
.hero-trust li{display:flex;align-items:center;gap:7px}
.hero-trust svg{width:16px;height:16px;flex:0 0 16px;color:var(--c-success)}
.hero-visual{position:relative}
.hero-visual>img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:18px;box-shadow:var(--shadow-2);background:var(--c-primary-100)}
.float-card{position:absolute;display:flex;flex-direction:column;gap:2px;padding:12px 16px;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--shadow-2)}
.float-card strong{font-size:20px;color:var(--c-ink);font-variant-numeric:tabular-nums;line-height:1.2}
.float-card span{font-size:12px;color:var(--c-muted)}
.float-a{left:-16px;bottom:56px}
.float-b{right:-12px;top:52px}
.corner-tag{position:absolute;right:-8px;bottom:-12px;display:inline-flex;align-items:center;gap:6px;height:32px;padding:0 14px;border-radius:var(--r-pill);background:var(--c-accent);color:#fff;font-size:13px;font-weight:600;box-shadow:var(--shadow-1)}
.corner-tag::before{content:"";width:7px;height:7px;border-radius:50%;background:#fff;opacity:.9}

/* 数据信任条 */
.trustbar{background:var(--c-surface);border-bottom:1px solid var(--c-line)}
.trustbar-grid{display:grid;grid-template-columns:repeat(4,1fr);padding:28px 24px}
.trust-item{padding:0 24px;border-left:1px solid var(--c-line);text-align:left}
.trust-item:first-child{border-left:0;padding-left:0}
.trust-item strong{display:block;font-size:34px;font-weight:700;color:var(--c-ink);line-height:1.15;font-variant-numeric:tabular-nums}
.trust-item strong em{font-style:normal;font-size:16px;font-weight:600;color:var(--c-muted);margin-left:4px}
.trust-item span{font-size:14px;color:var(--c-muted)}

/* 板块 */
.section{padding:var(--sp-section) 0}
.section-alt{background:var(--c-surface)}
.section-head{max-width:720px;margin-bottom:40px}
.section-head h2{margin-bottom:12px}
.section-head p{font-size:16px;color:var(--c-body)}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none}

/* 步骤 */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step{position:relative;padding-right:16px}
.step::after{content:"";position:absolute;left:64px;right:-24px;top:18px;height:1px;background:var(--c-line)}
.step:last-child::after{display:none}
.step-num{font-size:34px;font-weight:700;color:var(--c-primary);line-height:1;font-variant-numeric:tabular-nums;margin-bottom:14px}
.step h3{font-size:18px;margin-bottom:8px}
.step p{font-size:14px;color:var(--c-body)}

/* 阶梯 */
.ladder{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:end}
.ladder-card{position:relative;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--shadow-1);padding:24px;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.ladder-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--c-primary-100)}
.ladder-card.lv1{min-height:262px}
.ladder-card.lv2{min-height:302px}
.ladder-card.lv3{min-height:342px}
.ladder-card h3{margin:14px 0 6px;font-size:19px}
.ladder-goal{font-size:14px;color:var(--c-muted);margin-bottom:14px}
.ladder-list{display:flex;flex-direction:column;gap:9px;font-size:14px}
.ladder-list li{position:relative;padding-left:18px}
.ladder-list li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:2px;border-radius:2px;background:var(--c-primary)}
.ladder-card .badge{margin-top:18px}

/* 对比 */
.compare{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.compare-col{position:relative;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--shadow-1);padding:26px 24px;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.compare-col:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--c-primary-100)}
.compare-col.recommend{border-color:var(--c-accent);transform:translateY(-8px)}
.compare-col.recommend:hover{transform:translateY(-12px)}
.compare-col.recommend::before{content:"";position:absolute;left:0;right:0;top:0;height:4px;background:var(--c-accent);border-radius:14px 14px 0 0}
.compare-col h3{font-size:19px;margin-bottom:6px}
.compare-num{font-size:26px;font-weight:700;color:var(--c-ink);font-variant-numeric:tabular-nums;margin-bottom:16px}
.compare-num em{font-style:normal;font-size:13px;font-weight:500;color:var(--c-muted);margin-left:6px}
.compare-list{display:flex;flex-direction:column;gap:11px;font-size:14.5px;border-top:1px solid var(--c-line);padding-top:16px}
.compare-list li{display:flex;align-items:flex-start;gap:9px}
.compare-list .ico{flex:0 0 18px;font-weight:700;line-height:1.6}
.ico.ok{color:var(--c-success)}
.ico.no{color:var(--c-muted)}
.compare-col .btn{margin-top:20px}
.compare-tag{position:absolute;right:20px;top:-12px}

/* 限时横幅 */
.banner{position:relative;overflow:hidden;border-radius:18px;background:var(--c-primary);color:#fff;padding:36px;display:grid;grid-template-columns:1.3fr auto auto;gap:28px;align-items:center;box-shadow:var(--shadow-2)}
.banner::after{content:"";position:absolute;inset:0;background-image:repeating-linear-gradient(135deg,rgba(255,255,255,.08) 0 2px,transparent 2px 12px);pointer-events:none}
.banner>*{position:relative;z-index:1}
.banner h2{color:#fff;font-size:26px;margin:10px 0 8px}
.banner p{color:rgba(255,255,255,.82);font-size:15px;max-width:460px}
.banner .badge{background:rgba(255,255,255,.16);color:#fff}
.countdown{display:flex;gap:12px}
.cd-cell{width:76px;padding:10px 0;text-align:center;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.26);border-radius:12px}
.cd-cell strong{display:block;font-size:26px;font-weight:700;line-height:1.2;font-variant-numeric:tabular-nums}
.cd-cell span{font-size:12px;opacity:.85}
.banner-actions{display:flex;flex-direction:column;align-items:flex-start;gap:10px}
.banner-actions .text-link{color:#fff}
.banner-actions .text-link:hover{color:rgba(255,255,255,.8)}

/* 资讯列表 */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{display:flex;flex-direction:column;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-1);color:inherit;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--c-primary-100)}
.post-cover{aspect-ratio:16/9;background:var(--c-primary-100);overflow:hidden}
.post-cover img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .3s ease}
.post-card:hover .post-cover img{transform:scale(1.03)}
.post-body{padding:20px;display:flex;flex-direction:column;gap:10px}
.post-body h3{font-size:17px;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-body p{margin:0;font-size:14px;color:var(--c-muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-body time{font-size:13px;color:var(--c-muted);font-variant-numeric:tabular-nums}
.post-body .badge{align-self:flex-start}
.empty-state{display:flex;flex-direction:column;align-items:center;text-align:center;gap:14px;padding:56px 24px;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--shadow-1)}
.empty-state svg{width:44px;height:44px;color:var(--c-muted)}
.empty-state p{color:var(--c-muted);font-size:15px}
.skeleton{background:linear-gradient(90deg,var(--c-line) 25%,#f0f5fa 37%,var(--c-line) 63%);background-size:400% 100%;animation:shimmer 1.4s ease infinite}
@keyframes shimmer{0%{background-position:100% 50%}100%{background-position:0 50%}}

/* FAQ */
.faq{display:grid;gap:12px}
.faq-item{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease}
.faq-item.open{border-color:var(--c-primary-100);box-shadow:var(--shadow-1)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 22px;background:transparent;border:0;text-align:left;font-size:16px;font-weight:600;color:var(--c-ink);cursor:pointer}
.faq-icon{position:relative;width:16px;height:16px;flex:0 0 16px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--c-primary);border-radius:2px;transition:transform .2s ease}
.faq-icon::before{left:0;right:0;top:7px;height:2px}
.faq-icon::after{top:0;bottom:0;left:7px;width:2px}
.faq-item.open .faq-icon::after{transform:scaleY(0)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .2s ease;background:var(--c-bg)}
.faq-item.open .faq-a{max-height:340px}
.faq-a-inner{padding:16px 22px;font-size:15px;color:var(--c-body)}

/* 表单 */
.form-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:32px;align-items:start}
.form-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--shadow-1);padding:28px}
.form-card h3{margin-bottom:6px}
.form-card>p{font-size:14px;color:var(--c-muted);margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;font-weight:600;color:var(--c-ink);margin-bottom:7px}
.field input,.field select,.field textarea{width:100%;height:44px;padding:0 14px;border:1px solid var(--c-line);border-radius:var(--r-btn);background:#fff;color:var(--c-ink);font-size:15px;transition:border-color .18s ease,box-shadow .18s 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:0;border-color:var(--c-primary);box-shadow:0 0 0 3px var(--c-primary-100)}
.field.has-error input,.field.has-error select,.field.has-error textarea{border-color:var(--c-danger)}
.field-error{display:none;margin-top:6px;font-size:13px;color:var(--c-danger)}
.field.has-error .field-error{display:block}
.checkbox{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--c-body)}
.checkbox input{width:18px;height:18px;margin-top:4px;flex:0 0 18px;accent-color:var(--c-primary)}
.form-note{margin-top:14px;font-size:13px;color:var(--c-muted)}
.form-side{display:flex;flex-direction:column;gap:18px}
.form-side img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-card);background:var(--c-primary-100)}
.side-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--shadow-1);padding:22px}
.side-card h3{font-size:17px;margin-bottom:12px}
.side-list{display:flex;flex-direction:column;gap:12px;font-size:14.5px}
.side-list li{display:flex;gap:10px;align-items:flex-start}
.side-list .num{flex:0 0 22px;height:22px;border-radius:50%;background:var(--c-primary-100);color:var(--c-primary-700);font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;margin-top:4px}

/* 页脚 */
.site-footer{background:var(--c-ink);color:#94A5B8;padding:56px 0 24px;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.10)}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:17px;font-weight:700;margin-bottom:14px}
.footer-brand em{font-style:normal;color:#7FB2E4}
.footer-about{line-height:1.8;max-width:320px}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px;font-weight:600}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{color:#94A5B8;transition:color .18s ease}
.footer-col a:hover{color:#fff}
.footer-contact li{display:flex;gap:8px;align-items:flex-start}
.footer-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding-top:22px;font-size:13px;color:#7C8DA1}
.to-top{position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;background:var(--c-primary);color:#fff;border:0;cursor:pointer;display:none;align-items:center;justify-content:center;box-shadow:var(--shadow-2);z-index:70;transition:background-color .18s ease,transform .18s ease}
.to-top:hover{background:var(--c-primary-700);transform:translateY(-2px)}
.to-top.show{display:flex}

/* 响应式 */
@media (max-width:1279px){
  .hero-grid{gap:36px}
  .search input{width:96px}
}
@media (max-width:1023px){
  :root{--sp-section:64px}
  .main-nav,.search,.nav-divider,.header-inner .btn{display:none}
  .hamburger{display:inline-flex}
  .nav-left{flex:1 1 auto}
  .hero-grid{grid-template-columns:1fr;min-height:0;padding-top:44px;padding-bottom:52px;gap:32px}
  .hero-sub{max-width:none}
  .hero-visual{max-width:620px}
  .float-a{left:0;bottom:24px}
  .float-b{right:0;top:20px}
  .trustbar-grid{grid-template-columns:repeat(2,1fr);gap:24px 0}
  .trust-item:nth-child(3){border-left:0;padding-left:0}
  .steps{grid-template-columns:repeat(2,1fr);gap:28px}
  .step::after{display:none}
  .ladder{grid-template-columns:1fr}
  .ladder-card,.ladder-card.lv1,.ladder-card.lv2,.ladder-card.lv3{min-height:0}
  .compare{grid-template-columns:1fr}
  .compare-col.recommend{transform:none}
  .compare-col.recommend:hover{transform:translateY(-4px)}
  .banner{grid-template-columns:1fr;gap:22px}
  .banner p{max-width:none}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .form-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:28px}
}
@media (max-width:767px){
  :root{--sp-section:48px}
  .container{padding:0 16px}
  .header-inner{height:56px}
  h2{font-size:24px}
  .hero{padding-top:0}
  .hero-grid{padding-top:32px;padding-bottom:44px}
  .hero-actions{gap:10px}
  .hero-actions .btn{flex:1 1 auto}
  .float-card{padding:10px 13px}
  .float-card strong{font-size:17px}
  .corner-tag{right:0;bottom:-10px}
  .trustbar-grid{grid-template-columns:1fr;gap:20px}
  .trust-item{border-left:0;padding:0;border-top:1px solid var(--c-line);padding-top:16px}
  .trust-item:first-child{border-top:0;padding-top:0}
  .section-head-row{flex-direction:column;align-items:flex-start;gap:14px}
  .steps{grid-template-columns:1fr;gap:24px}
  .step{padding-right:0}
  .news-grid{grid-template-columns:1fr}
  .compare-list{font-size:14px}
  .banner{padding:26px 20px}
  .countdown{width:100%}
  .cd-cell{flex:1;width:auto}
  .banner-actions{width:100%}
  .banner-actions .btn{width:100%}
  .form-card{padding:22px 20px}
  .footer-grid{grid-template-columns:1fr}
  .to-top{right:16px;bottom:16px}
}
@media (max-width:480px){
  h1{font-size:27px}
  .hero-sub{font-size:16px}
  .btn-lg{height:46px;padding:0 18px;font-size:15px}
  .hero-actions .btn{width:100%}
  .trust-item strong{font-size:28px}
  .float-a{left:0;bottom:14px}
  .float-b{right:0;top:12px}
}

/* roulang page: category1 */
:root{
  --c-primary:#1B5FA8;
  --c-primary-700:#14498A;
  --c-primary-100:#E7F0FA;
  --c-accent:#FF6B2C;
  --c-accent-700:#E2541A;
  --c-accent-100:#FFF0E7;
  --c-success:#12A06A;
  --c-success-100:#E6F6EF;
  --c-danger:#D93F3F;
  --c-ink:#12233A;
  --c-body:#4A5A6E;
  --c-muted:#8A99AB;
  --c-bg:#F4F7FB;
  --c-surface:#FFFFFF;
  --c-line:#E2EAF3;
  --shadow-1:0 1px 2px rgba(18,35,58,.04),0 8px 24px rgba(18,35,58,.06);
  --shadow-2:0 2px 4px rgba(18,35,58,.06),0 16px 36px rgba(18,35,58,.10);
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --font-sans:"PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Barlow","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--c-body);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:var(--c-primary);text-decoration:none}
a:hover{color:var(--c-primary-700)}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
ul,ol{list-style:none}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px}
h1,h2,h3,h4{color:var(--c-ink);line-height:1.35;font-weight:700}
h1{font-size:clamp(30px,4vw,48px);line-height:1.25}
h2{font-size:clamp(24px,2.6vw,30px)}
h3{font-size:20px;font-weight:600;line-height:1.5}
p{font-size:16px}

.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section--tight{padding:64px 0}
.section--alt{background:var(--c-surface)}
.section-head{max-width:760px;margin-bottom:40px}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--c-accent);
  background:var(--c-accent-100);border-radius:var(--r-pill);
  padding:5px 14px;margin-bottom:16px;letter-spacing:.02em;
}
.section-head h2{margin-bottom:14px}
.section-head p{color:var(--c-body);max-width:700px}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center}
.section-head--center p{margin-left:auto;margin-right:auto}

/* ---------- 顶部公告条 ---------- */
.topbar{background:var(--c-accent-100);color:var(--c-primary-700);font-size:14px}
.topbar .container{display:flex;align-items:center;gap:12px;min-height:40px;padding-top:6px;padding-bottom:6px}
.topbar p{font-size:14px;margin:0;flex:1;line-height:1.6}
.topbar strong{color:var(--c-accent-700)}
.topbar-close{
  flex:none;width:26px;height:26px;border:0;border-radius:50%;
  background:rgba(27,95,168,.10);color:var(--c-primary-700);
  cursor:pointer;font-size:15px;line-height:1;display:flex;align-items:center;justify-content:center;
  transition:background .2s;
}
.topbar-close:hover{background:rgba(27,95,168,.2)}
.topbar[hidden]{display:none}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--c-surface);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .25s ease;
}
.site-header.scrolled{box-shadow:var(--shadow-1)}
.header-inner{display:flex;align-items:center;height:64px;gap:8px}
.brand{
  display:flex;align-items:center;gap:10px;flex:none;
  font-size:18px;font-weight:700;color:var(--c-ink);letter-spacing:.01em;
}
.brand:hover{color:var(--c-ink)}
.brand em{font-style:normal;color:var(--c-primary)}
.logo-mark{width:36px;height:36px;flex:none;border-radius:10px}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:14px}
.main-nav a{
  position:relative;padding:8px 13px;border-radius:8px;
  font-size:15px;color:var(--c-body);transition:color .2s,background .2s;white-space:nowrap;
}
.main-nav a:hover{color:var(--c-primary);background:var(--c-primary-100)}
.main-nav a.active{color:var(--c-primary);font-weight:600}
.main-nav a.active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;
  background:var(--c-primary);border-radius:2px;
}
.header-divider{width:1px;height:26px;background:var(--c-line);margin:0 6px;flex:none}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-search{
  display:flex;align-items:center;gap:8px;
  height:38px;padding:0 14px;border:1px solid var(--c-line);border-radius:var(--r-pill);
  background:var(--c-bg);color:var(--c-muted);font-size:14px;min-width:190px;
  transition:border-color .2s,background .2s;
}
.nav-search:hover{border-color:var(--c-primary);background:#fff}
.nav-search svg{width:16px;height:16px;flex:none}
.nav-search span{font-size:14px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1.5px solid transparent;border-radius:var(--r-btn);
  font-weight:600;cursor:pointer;white-space:nowrap;
  transition:transform .18s ease,background .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn--sm{height:34px;padding:0 16px;font-size:14px}
.btn--md{height:40px;padding:0 20px;font-size:15px}
.btn--lg{height:48px;padding:0 28px;font-size:16px}
.btn--primary{background:var(--c-primary);color:#fff;box-shadow:0 6px 16px rgba(27,95,168,.22)}
.btn--primary:hover{background:var(--c-primary-700);color:#fff}
.btn--accent{background:var(--c-accent);color:#fff;box-shadow:0 6px 16px rgba(255,107,44,.26)}
.btn--accent:hover{background:var(--c-accent-700);color:#fff}
.btn--ghost{background:transparent;color:var(--c-primary);border-color:var(--c-primary)}
.btn--ghost:hover{background:var(--c-primary-100);color:var(--c-primary-700)}
.btn--ghost-accent{background:transparent;color:var(--c-accent-700);border-color:var(--c-accent)}
.btn--ghost-accent:hover{background:var(--c-accent-100);color:var(--c-accent-700)}
.btn--text{background:none;border:0;color:var(--c-primary);padding:0;height:auto}
.btn--text::after{content:"→";margin-left:6px;transition:transform .2s}
.btn--text:hover::after{transform:translateX(3px)}
.btn[disabled]{opacity:.5;cursor:not-allowed;transform:none}
.nav-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--c-line);border-radius:10px;
  background:#fff;cursor:pointer;align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-ink);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-ink);border-radius:2px;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

.drawer{
  position:fixed;inset:0;z-index:80;background:var(--c-surface);
  display:flex;flex-direction:column;padding:0 20px 20px;
  transform:translateX(102%);transition:transform .3s ease;visibility:hidden;
}
.drawer.open{transform:translateX(0);visibility:visible}
.drawer-top{display:flex;align-items:center;justify-content:space-between;height:64px;border-bottom:1px solid var(--c-line)}
.drawer-close{width:38px;height:38px;border:1px solid var(--c-line);border-radius:10px;background:#fff;font-size:18px;cursor:pointer}
.drawer nav{display:flex;flex-direction:column;padding-top:12px}
.drawer nav a{padding:15px 4px;font-size:17px;color:var(--c-ink);border-bottom:1px solid var(--c-line)}
.drawer nav a.active{color:var(--c-primary);font-weight:700}
.drawer-foot{margin-top:auto;display:flex;flex-direction:column;gap:12px}
.drawer-foot .btn{width:100%}

/* ---------- 面包屑 ---------- */
.breadcrumb{background:var(--c-surface);border-bottom:1px solid var(--c-line)}
.breadcrumb ol{display:flex;align-items:center;flex-wrap:wrap;gap:8px;padding:14px 0;font-size:14px;color:var(--c-muted)}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--c-line)}
.breadcrumb a{color:var(--c-muted)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb [aria-current]{color:var(--c-ink);font-weight:600}

/* ---------- Hero ---------- */
.cat-hero{background:var(--c-surface);padding:56px 0 72px;position:relative;overflow:hidden}
.cat-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:repeating-linear-gradient(135deg,rgba(27,95,168,.05) 0 1px,transparent 1px 14px);
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 55%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 55%,transparent);
}
.cat-hero .container{position:relative;display:grid;grid-template-columns:6fr 6fr;gap:48px;align-items:center}
.hero-copy h1{margin-bottom:18px}
.hero-copy h1 span{color:var(--c-primary)}
.hero-lead{font-size:17px;line-height:1.85;max-width:560px;margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;line-height:1;
  padding:7px 13px;border-radius:var(--r-pill);
}
.badge--primary{background:var(--c-primary-100);color:var(--c-primary-700)}
.badge--accent{background:var(--c-accent-100);color:var(--c-accent-700)}
.badge--success{background:var(--c-success-100);color:var(--c-success)}
.badge--line{background:#fff;color:var(--c-body);border:1px solid var(--c-line)}
.hero-art{position:relative}
.hero-art img{
  width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:16px;
  box-shadow:var(--shadow-2);background:var(--c-primary-100);
}
.float-card{
  position:absolute;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--shadow-2);padding:14px 16px;min-width:168px;
}
.float-card .fc-num{font-family:var(--font-num);font-size:22px;font-weight:700;color:var(--c-ink);line-height:1.2}
.float-card .fc-label{font-size:12px;color:var(--c-muted);line-height:1.5}
.float-card--a{left:-16px;bottom:24px}
.float-card--b{right:-12px;top:22px}
.float-card--c{
  right:18px;bottom:-18px;background:var(--c-accent);border-color:var(--c-accent);color:#fff;
}
.float-card--c .fc-num{color:#fff;font-size:16px}
.float-card--c .fc-label{color:rgba(255,255,255,.85)}

/* ---------- 特性卡 ---------- */
.card-grid{display:grid;gap:24px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--shadow-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--c-primary-100)}
.card h3{margin-bottom:10px}
.card p{font-size:15px;line-height:1.8}
.card-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;margin-bottom:14px;
  font-family:var(--font-num);font-size:15px;font-weight:700;
  background:var(--c-accent-100);color:var(--c-accent-700);
}
.card-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;padding-top:16px;border-top:1px dashed var(--c-line)}
.card-meta span{font-size:13px;color:var(--c-muted)}
.card-meta strong{color:var(--c-ink);font-family:var(--font-num);font-weight:700}

/* ---------- 图文交替 ---------- */
.zigzag{display:flex;flex-direction:column;gap:56px}
.zig-row{display:grid;grid-template-columns:6fr 6fr;gap:48px;align-items:center}
.zig-row:nth-child(even) .zig-media{order:2}
.zig-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:16px;box-shadow:var(--shadow-1);background:var(--c-primary-100)}
.zig-text h3{margin-bottom:14px;font-size:24px;font-weight:700}
.zig-text p{margin-bottom:18px}
.tick-list li{
  position:relative;padding-left:28px;margin-bottom:12px;font-size:15px;line-height:1.8;
}
.tick-list li::before{
  content:"";position:absolute;left:0;top:9px;width:16px;height:16px;border-radius:50%;
  background:var(--c-success-100);
  background-image:linear-gradient(135deg,transparent 46%,var(--c-success) 46%,var(--c-success) 56%,transparent 56%);
}
.tick-list li strong{color:var(--c-ink)}

/* ---------- 对比清单 ---------- */
.compare-wrap{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--shadow-1);overflow:hidden}
.compare-head{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;
  background:var(--c-primary);color:#fff;font-weight:600;font-size:15px;
}
.compare-head span{padding:16px 18px}
.compare-row{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;
  border-top:1px solid var(--c-line);font-size:15px;
}
.compare-row:nth-child(odd){background:#FBFDFF}
.compare-row > div{padding:16px 18px;display:flex;align-items:flex-start;gap:8px;line-height:1.7}
.compare-row .row-key{color:var(--c-ink);font-weight:600}
.mark{flex:none;width:18px;height:18px;border-radius:50%;margin-top:4px;position:relative}
.mark--yes{background:var(--c-success-100)}
.mark--yes::after{content:"";position:absolute;left:4px;top:6px;width:9px;height:5px;border-left:2px solid var(--c-success);border-bottom:2px solid var(--c-success);transform:rotate(-45deg)}
.mark--no{background:#EEF2F7}
.mark--no::after{content:"";position:absolute;left:5px;top:8px;width:8px;height:2px;background:var(--c-muted);border-radius:2px}
.compare-note{padding:16px 18px;font-size:13px;color:var(--c-muted);border-top:1px solid var(--c-line);background:#FBFDFF}

/* ---------- 步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative}
.steps::before{
  content:"";position:absolute;left:40px;right:40px;top:22px;height:1px;
  background:repeating-linear-gradient(90deg,var(--c-line) 0 8px,transparent 8px 16px);
}
.step{position:relative;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:44px 22px 22px;box-shadow:var(--shadow-1)}
.step-num{
  position:absolute;top:-18px;left:22px;width:44px;height:44px;border-radius:12px;
  background:var(--c-primary);color:#fff;display:flex;align-items:center;justify-content:center;
  font-family:var(--font-num);font-size:18px;font-weight:700;box-shadow:0 8px 18px rgba(27,95,168,.24);
}
.step h3{font-size:17px;margin-bottom:8px}
.step p{font-size:14.5px;line-height:1.75}

/* ---------- FAQ ---------- */
.faq{max-width:860px;margin:0 auto;border-top:1px solid var(--c-line)}
.faq-item{border-bottom:1px solid var(--c-line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:none;border:0;text-align:left;cursor:pointer;
  padding:22px 4px;font-size:17px;font-weight:600;color:var(--c-ink);line-height:1.6;
}
.faq-q:hover{color:var(--c-primary)}
.faq-icon{
  flex:none;width:26px;height:26px;border-radius:50%;border:1.5px solid var(--c-line);
  position:relative;transition:background .2s,border-color .2s,transform .2s;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--c-primary);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:11px;height:1.5px}
.faq-icon::after{width:1.5px;height:11px;transition:opacity .2s}
.faq-item.open .faq-icon{background:var(--c-primary-100);border-color:var(--c-primary-100)}
.faq-item.open .faq-icon::after{opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .2s ease}
.faq-a-inner{padding:0 4px 22px;font-size:15.5px;line-height:1.85;color:var(--c-body);background:transparent}
.faq-item.open .faq-a-inner{background:linear-gradient(180deg,rgba(231,240,250,.5),rgba(231,240,250,0));border-radius:0 0 10px 10px}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:18px;
  background:var(--c-primary);color:#fff;padding:52px 48px;
  display:grid;grid-template-columns:1.5fr 1fr;gap:36px;align-items:center;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(135deg,rgba(255,255,255,.07) 0 2px,transparent 2px 16px);
}
.cta-band > *{position:relative}
.cta-band h2{color:#fff;margin-bottom:12px}
.cta-band p{color:rgba(255,255,255,.86);font-size:16px;max-width:620px}
.cta-actions{display:flex;flex-direction:column;gap:14px;align-items:flex-start}
.cta-actions .btn{width:100%}
.cta-hint{font-size:13px;color:rgba(255,255,255,.7)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-ink);color:#A9B7C7;padding:64px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-brand em{font-style:normal;color:#7FB2E8}
.footer-about{font-size:14.5px;line-height:1.85;color:#93A3B6;max-width:340px}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:18px;font-weight:600}
.footer-col ul li{margin-bottom:12px}
.footer-col a{color:#A9B7C7;font-size:14.5px;transition:color .2s}
.footer-col a:hover{color:#fff}
.footer-contact li{display:flex;gap:8px;font-size:14.5px;color:#A9B7C7;margin-bottom:12px}
.footer-contact span:first-child{color:#7C8CA0;flex:none}
.footer-bottom{
  margin-top:48px;padding-top:24px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13.5px;color:#7C8CA0;
}
.back-top{
  position:fixed;right:24px;bottom:24px;z-index:70;
  width:44px;height:44px;border-radius:50%;border:1px solid var(--c-line);
  background:#fff;color:var(--c-primary);box-shadow:var(--shadow-2);
  cursor:pointer;display:flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transform:translateY(8px);transition:.25s ease;
}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .cat-hero .container{gap:36px}
  .float-card--b{right:8px}
}
@media (max-width:1023px){
  .main-nav,.nav-search,.header-divider{display:none}
  .nav-toggle{display:flex}
  .header-actions .btn--primary{display:none}
  .cat-hero{padding:40px 0 56px}
  .cat-hero .container{grid-template-columns:1fr;gap:32px}
  .hero-lead{max-width:100%}
  .float-card--a{left:10px;bottom:14px}
  .float-card--b{right:10px;top:14px}
  .float-card--c{right:14px;bottom:-14px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .steps::before{display:none}
  .zig-row{grid-template-columns:1fr;gap:28px}
  .zig-row:nth-child(even) .zig-media{order:0}
  .compare-head,.compare-row{grid-template-columns:1.3fr 1fr 1fr 1fr;font-size:14px}
  .compare-head span,.compare-row > div{padding:14px 12px}
  .cta-band{grid-template-columns:1fr;padding:40px 32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:64px 0}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .section{padding:48px 0}
  .section--tight{padding:44px 0}
  .header-inner{height:56px}
  .brand{font-size:16px}
  .logo-mark{width:32px;height:32px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .grid-4,.grid-3,.grid-2{grid-template-columns:1fr}
  .card{padding:20px}
  .steps{grid-template-columns:1fr}
  .step{padding:40px 20px 20px}
  .compare-head{display:none}
  .compare-row{grid-template-columns:1fr;padding:6px 0}
  .compare-row > div{padding:8px 16px}
  .compare-row .row-key{background:var(--c-primary-100);color:var(--c-primary-700);border-radius:8px 8px 0 0;padding:12px 16px}
  .compare-row > div::before{
    content:attr(data-th);display:block;font-size:12px;color:var(--c-muted);
    min-width:64px;flex:none;padding-top:3px;
  }
  .compare-row .row-key::before{display:none}
  .cta-band{padding:32px 22px;border-radius:14px}
  .footer-grid{grid-template-columns:1fr}
  .footer-about{max-width:100%}
  .back-top{right:16px;bottom:16px}
  .faq-q{font-size:16px;padding:18px 2px}
}
@media (max-width:520px){
  h1{font-size:26px}
  .hero-lead{font-size:15.5px}
  .float-card{padding:10px 12px;min-width:132px}
  .float-card .fc-num{font-size:18px}
  .float-card--b{top:8px;right:8px}
  .float-card--a{left:8px;bottom:8px}
  .float-card--c{display:none}
  .btn--lg{width:100%}
  .footer-bottom{flex-direction:column;gap:6px}
}

/* roulang page: article */
:root{
  --c-primary:#1B5FA8;
  --c-primary-700:#14498A;
  --c-primary-100:#E7F0FA;
  --c-accent:#FF6B2C;
  --c-accent-700:#E2541A;
  --c-accent-100:#FFF0E7;
  --c-success:#12A06A;
  --c-danger:#D93F3F;
  --c-ink:#12233A;
  --c-body:#4A5A6E;
  --c-muted:#8A99AB;
  --c-bg:#F4F7FB;
  --c-surface:#FFFFFF;
  --c-line:#E2EAF3;
  --shadow-1:0 1px 2px rgba(18,35,58,.04),0 8px 24px rgba(18,35,58,.06);
  --shadow-2:0 2px 4px rgba(18,35,58,.06),0 16px 36px rgba(18,35,58,.10);
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-body);
  font-family:"PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--c-primary);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--c-primary-700);}
button,input,select,textarea{font:inherit;color:inherit;}
ul,ol{margin:0;}
h1,h2,h3,h4{margin:0;color:var(--c-ink);line-height:1.4;}
p{margin:0 0 1em;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ===== 顶部导航 ===== */
.site-header{
  position:sticky;top:0;z-index:120;
  background:var(--c-surface);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .22s ease;
}
.site-header.is-scrolled{box-shadow:var(--shadow-1);}
.nav-inner{display:flex;align-items:center;gap:22px;height:64px;}
.nav-left{flex:1 1 60%;display:flex;align-items:center;gap:26px;min-width:0;}
.brand{display:flex;align-items:center;gap:10px;flex:none;color:var(--c-ink);font-weight:700;font-size:18px;letter-spacing:.2px;}
.brand .logo-mark{width:34px;height:34px;flex:none;}
.brand-text em{font-style:normal;color:var(--c-primary);}
.main-nav{display:flex;align-items:center;gap:2px;min-width:0;}
.main-nav a{
  padding:7px 12px;border-radius:8px;font-size:15px;font-weight:500;color:var(--c-body);
  border-bottom:2px solid transparent;white-space:nowrap;
}
.main-nav a:hover{color:var(--c-primary);background:var(--c-primary-100);}
.main-nav a.active{color:var(--c-primary);border-bottom-color:var(--c-primary);}
.nav-divider{width:1px;height:26px;background:var(--c-line);flex:none;}
.nav-right{flex:1 1 40%;display:flex;align-items:center;justify-content:flex-end;gap:14px;}
.nav-search{
  display:flex;align-items:center;gap:8px;height:38px;padding:0 14px;min-width:200px;
  background:var(--c-bg);border:1px solid var(--c-line);border-radius:var(--r-pill);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.nav-search:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 3px var(--c-primary-100);}
.nav-search svg{flex:none;color:var(--c-muted);}
.nav-search input{border:0;background:transparent;outline:none;width:100%;font-size:14px;}
.nav-link{font-size:14px;font-weight:500;color:var(--c-body);white-space:nowrap;}
.nav-link:hover{color:var(--c-primary);}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:42px;height:42px;border:1px solid var(--c-line);border-radius:10px;
  background:var(--c-surface);cursor:pointer;color:var(--c-ink);
}
.nav-toggle:hover{border-color:var(--c-primary);color:var(--c-primary);}

/* 移动端抽屉 */
.mobile-drawer{
  position:fixed;left:0;right:0;top:64px;bottom:0;z-index:110;
  background:var(--c-surface);padding:18px 24px 32px;
  display:flex;flex-direction:column;justify-content:space-between;
  opacity:0;visibility:hidden;transform:translateY(-10px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s;
}
.mobile-drawer.open{opacity:1;visibility:visible;transform:none;}
.mobile-drawer nav{display:flex;flex-direction:column;}
.mobile-drawer nav a{padding:15px 2px;border-bottom:1px solid var(--c-line);font-size:16px;color:var(--c-ink);font-weight:500;}
.mobile-drawer nav a:hover{color:var(--c-primary);}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border:1.5px solid transparent;border-radius:var(--r-btn);
  font-size:16px;font-weight:600;cursor:pointer;text-align:center;
  transition:transform .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.btn-primary{background:var(--c-primary);color:#fff;}
.btn-primary:hover{background:var(--c-primary-700);color:#fff;transform:translateY(-1px);}
.btn-accent{background:var(--c-accent);color:#fff;}
.btn-accent:hover{background:var(--c-accent-700);color:#fff;transform:translateY(-1px);}
.btn-ghost{border-color:var(--c-primary);color:var(--c-primary);background:transparent;}
.btn-ghost:hover{background:var(--c-primary-100);color:var(--c-primary-700);transform:translateY(-1px);}
.btn-light{background:#fff;color:var(--c-primary);}
.btn-light:hover{background:var(--c-primary-100);color:var(--c-primary-700);transform:translateY(-1px);}
.btn-sm{height:38px;padding:0 18px;font-size:14px;border-radius:9px;}
.btn-block{width:100%;}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none;}

/* ===== 徽章 / 标签 ===== */
.badge{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:var(--r-pill);font-size:12px;line-height:1;font-weight:600;}
.badge-primary{background:var(--c-primary-100);color:var(--c-primary-700);}
.badge-accent{background:var(--c-accent-100);color:var(--c-accent-700);}
.badge-success{background:#E6F6EF;color:var(--c-success);}
.tag{
  display:inline-flex;align-items:center;padding:6px 14px;border-radius:var(--r-pill);
  background:var(--c-surface);border:1px solid var(--c-line);font-size:13px;color:var(--c-body);
  transition:border-color .18s ease,color .18s ease,background-color .18s ease;
}
.tag:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-100);}

/* ===== 面包屑与文章头 ===== */
.article-hero{background:var(--c-surface);border-bottom:1px solid var(--c-line);position:relative;overflow:hidden;}
.article-hero::after{
  content:"";position:absolute;right:-60px;top:-40px;width:340px;height:340px;
  background:repeating-linear-gradient(135deg,rgba(27,95,168,.06) 0 2px,transparent 2px 12px);
  transform:rotate(8deg);pointer-events:none;
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--c-muted);padding:22px 0 4px;}
.breadcrumb a{color:var(--c-muted);}
.breadcrumb a:hover{color:var(--c-primary);}
.breadcrumb .sep{color:#C6D3E2;}
.breadcrumb .current{color:var(--c-ink);font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:46vw;}
.article-hero-inner{display:grid;grid-template-columns:1fr;gap:36px;padding-bottom:44px;align-items:center;position:relative;z-index:1;}
.article-head{max-width:820px;}
.article-head h1{font-size:clamp(26px,3.6vw,42px);line-height:1.3;font-weight:700;letter-spacing:-.3px;margin:16px 0 18px;}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px 20px;font-size:14px;color:var(--c-muted);}
.article-meta b{color:var(--c-ink);font-weight:600;font-variant-numeric:tabular-nums;}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:#C6D3E2;}
.share-btn{
  display:inline-flex;align-items:center;gap:6px;height:32px;padding:0 14px;
  border:1px solid var(--c-line);border-radius:var(--r-pill);background:var(--c-surface);
  font-size:13px;color:var(--c-body);cursor:pointer;transition:border-color .18s ease,color .18s ease;
}
.share-btn:hover{border-color:var(--c-primary);color:var(--c-primary);}
.article-hero-media{display:none;border-radius:var(--r-img);overflow:hidden;box-shadow:var(--shadow-1);}
.article-hero-media img{width:100%;aspect-ratio:16/9;object-fit:cover;}

/* ===== 通用板块 ===== */
.section{padding:64px 0;}
.section-tight{padding:44px 0;}
.section-head{max-width:760px;margin-bottom:34px;}
.section-head h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;letter-spacing:-.2px;}
.section-head p{margin:12px 0 0;color:var(--c-body);font-size:16px;}
.section-head .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--c-primary);letter-spacing:1px;margin-bottom:10px;}
.section-head .eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--c-accent);}

/* ===== 正文布局 ===== */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:44px;}
.article-main{width:100%;max-width:820px;margin:0 auto;min-width:0;}
.article-body{font-size:17px;line-height:1.9;color:var(--c-body);}
.article-body p{margin:0 0 1.2em;}
.article-body h2{
  position:relative;font-size:24px;font-weight:700;color:var(--c-ink);
  margin:32px 0 14px;padding-left:14px;line-height:1.5;
}
.article-body h2::before{content:"";position:absolute;left:0;top:7px;bottom:7px;width:3px;border-radius:2px;background:var(--c-primary);}
.article-body h3{font-size:19px;font-weight:600;color:var(--c-ink);margin:26px 0 10px;}
.article-body h4{font-size:17px;font-weight:600;color:var(--c-ink);margin:20px 0 8px;}
.article-body ul,.article-body ol{padding-left:22px;margin:0 0 1.2em;}
.article-body li{margin-bottom:.5em;}
.article-body ul li::marker{color:var(--c-primary);}
.article-body blockquote{
  margin:20px 0;padding:16px 20px;border-left:3px solid var(--c-primary);
  background:var(--c-primary-100);border-radius:0 12px 12px 0;color:var(--c-ink);
}
.article-body img{border-radius:var(--r-img);margin:18px 0;}
.article-body a{color:var(--c-primary);border-bottom:1px solid rgba(27,95,168,.35);}
.article-body a:hover{color:var(--c-primary-700);border-bottom-color:var(--c-primary-700);}
.article-body table{
  width:100%;border-collapse:collapse;display:block;overflow-x:auto;
  margin:18px 0;border:1px solid var(--c-line);border-radius:12px;background:var(--c-surface);
}
.article-body th,.article-body td{border:1px solid var(--c-line);padding:10px 14px;font-size:15px;text-align:left;}
.article-body th{background:var(--c-primary-100);color:var(--c-ink);font-weight:600;white-space:nowrap;}
.article-body pre{overflow-x:auto;background:#0F1E33;color:#E7F0FA;padding:16px 18px;border-radius:12px;font-size:14px;line-height:1.7;}
.article-body code{background:var(--c-primary-100);color:var(--c-primary-700);padding:2px 6px;border-radius:5px;font-size:14px;}

/* 空态 */
.empty-state{
  background:var(--c-surface);border:1px dashed var(--c-line);border-radius:var(--r-card);
  padding:52px 28px;text-align:center;box-shadow:var(--shadow-1);
}
.empty-state svg{color:var(--c-primary);margin:0 auto 16px;}
.empty-state strong{display:block;font-size:20px;color:var(--c-ink);margin-bottom:8px;}
.empty-state p{max-width:520px;margin:0 auto 22px;font-size:15px;color:var(--c-muted);}

/* 标签行 */
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:38px;padding-top:26px;border-top:1px solid var(--c-line);}
.tag-row .tag-label{font-size:13px;color:var(--c-muted);margin-right:4px;}

/* 上下篇 */
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:28px;}
.post-nav-item{
  display:block;padding:18px 20px;background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--shadow-1);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.post-nav-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:var(--c-primary-100);}
.post-nav-item span{font-size:13px;color:var(--c-muted);}
.post-nav-item strong{display:block;margin-top:6px;font-size:16px;font-weight:600;color:var(--c-ink);line-height:1.55;}
.post-nav-item.next{text-align:right;}
.back-cat{margin-top:28px;display:flex;flex-wrap:wrap;gap:12px;align-items:center;}

/* ===== 侧栏 ===== */
.article-aside{display:none;}
.aside-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--shadow-1);padding:22px;margin-bottom:20px;
}
.aside-card h3{font-size:16px;font-weight:600;margin-bottom:14px;}
.aside-card p{font-size:14px;color:var(--c-body);line-height:1.8;margin:0 0 12px;}
.check-list{list-style:none;padding:0;margin:0;}
.check-list li{position:relative;padding-left:24px;font-size:14px;line-height:1.75;margin-bottom:10px;color:var(--c-body);}
.check-list li::before{
  content:"";position:absolute;left:0;top:9px;width:12px;height:7px;
  border-left:2px solid var(--c-success);border-bottom:2px solid var(--c-success);transform:rotate(-45deg);
}
.aside-links{list-style:none;padding:0;margin:0;}
.aside-links li{border-bottom:1px dashed var(--c-line);}
.aside-links li:last-child{border-bottom:0;}
.aside-links a{display:block;padding:11px 0;font-size:14px;color:var(--c-body);}
.aside-links a:hover{color:var(--c-primary);}
.aside-media{border-radius:var(--r-img);overflow:hidden;margin-bottom:16px;}
.aside-media img{width:100%;aspect-ratio:4/3;object-fit:cover;}

/* ===== 相关推荐 ===== */
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.post-card{
  display:flex;flex-direction:column;background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--shadow-1);overflow:hidden;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--c-primary-100);}
.post-card-cover{aspect-ratio:16/9;overflow:hidden;background:var(--c-primary-100);}
.post-card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.post-card:hover .post-card-cover img{transform:scale(1.04);}
.post-card-body{padding:20px;display:flex;flex-direction:column;flex:1;}
.post-card-body h3{font-size:17px;font-weight:600;margin:10px 0 8px;line-height:1.55;color:var(--c-ink);}
.post-card-body h3 a{color:inherit;}
.post-card-body h3 a:hover{color:var(--c-primary);}
.post-card-body p{
  font-size:14px;color:var(--c-body);margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:16px;font-size:13px;color:var(--c-muted);font-variant-numeric:tabular-nums;}

/* ===== FAQ ===== */
.faq-list{max-width:860px;margin:0 auto;}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  margin-bottom:12px;overflow:hidden;transition:box-shadow .2s ease,border-color .2s ease;
}
.faq-item:hover{border-color:var(--c-primary-100);}
.faq-item.open{box-shadow:var(--shadow-1);border-color:var(--c-primary-100);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:18px 22px;background:none;border:0;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--c-ink);
}
.faq-icon{
  flex:none;width:26px;height:26px;border-radius:50%;background:var(--c-primary-100);color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;font-size:16px;line-height:1;
  transition:transform .2s ease,background-color .2s ease,color .2s ease;
}
.faq-item.open .faq-icon{transform:rotate(45deg);background:var(--c-accent-100);color:var(--c-accent-700);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .2s ease;padding:0 22px;}
.faq-a p{margin:0;font-size:15px;color:var(--c-body);line-height:1.85;}
.faq-item.open .faq-a{max-height:260px;padding-bottom:20px;}

/* ===== CTA ===== */
.cta-band{
  position:relative;overflow:hidden;border-radius:20px;background:var(--c-primary);
  padding:46px;color:#fff;display:grid;grid-template-columns:1.5fr 1fr;gap:28px;align-items:center;
}
.cta-band::before{
  content:"";position:absolute;left:0;right:0;top:0;height:6px;
  background:repeating-linear-gradient(135deg,var(--c-accent) 0 10px,transparent 10px 20px);
}
.cta-band::after{
  content:"";position:absolute;right:-40px;bottom:-60px;width:280px;height:280px;
  background:repeating-linear-gradient(135deg,rgba(255,255,255,.10) 0 3px,transparent 3px 16px);
  transform:rotate(10deg);pointer-events:none;
}
.cta-band h2{color:#fff;font-size:clamp(22px,2.6vw,32px);font-weight:700;position:relative;z-index:1;}
.cta-band p{color:rgba(255,255,255,.86);margin:14px 0 0;font-size:16px;position:relative;z-index:1;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:1;justify-content:flex-end;}

/* ===== 页脚 ===== */
.site-footer{background:var(--c-ink);color:var(--c-muted);margin-top:20px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px;padding:58px 0 38px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:18px;}
.footer-brand .logo-mark{width:34px;height:34px;flex:none;}
.footer-brand em{font-style:normal;color:var(--c-accent);}
.footer-about{font-size:14px;line-height:1.8;margin:14px 0 0;max-width:330px;}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px;}
.footer-col ul{list-style:none;padding:0;margin:0;}
.footer-col li{margin-bottom:10px;font-size:14px;}
.footer-col a{color:var(--c-muted);}
.footer-col a:hover{color:#fff;}
.footer-contact li{display:flex;gap:6px;flex-wrap:wrap;}
.footer-contact span:first-child{color:#B9C6D6;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding:20px 0;
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;font-size:13px;
}

/* 回到顶部 */
.back-to-top{
  position:fixed;right:22px;bottom:26px;z-index:130;
  width:46px;height:46px;border-radius:50%;border:0;cursor:pointer;
  background:var(--c-primary);color:#fff;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-2);opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s,background-color .2s ease;
}
.back-to-top.show{opacity:1;visibility:visible;transform:none;}
.back-to-top:hover{background:var(--c-primary-700);}

/* 复制提示 */
.toast{
  position:fixed;left:50%;bottom:34px;transform:translate(-50%,12px);
  background:var(--c-ink);color:#fff;font-size:14px;padding:10px 18px;border-radius:var(--r-pill);
  opacity:0;visibility:hidden;transition:opacity .2s ease,transform .2s ease,visibility .2s;z-index:200;
}
.toast.show{opacity:1;visibility:visible;transform:translate(-50%,0);}

/* ===== 响应式 ===== */
@media (min-width:1024px){
  .article-hero-inner{grid-template-columns:1.4fr 1fr;}
  .article-hero-media{display:block;}
}
@media (min-width:1280px){
  .article-layout{grid-template-columns:minmax(0,1fr) 300px;}
  .article-main{margin:0;}
  .article-aside{display:block;}
  .article-aside .aside-sticky{position:sticky;top:88px;}
}
@media (max-width:1279px){
  .nav-search{min-width:150px;}
}
@media (max-width:1023px){
  .main-nav{display:none;}
  .nav-search{display:none;}
  .nav-link{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-divider{display:none;}
  .nav-left{flex:1 1 auto;}
  .nav-right{flex:0 0 auto;}
  .related-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .cta-band{grid-template-columns:1fr;padding:36px;}
  .cta-actions{justify-content:flex-start;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .section{padding:48px 0;}
  .section-tight{padding:36px 0;}
  .brand{font-size:16px;}
  .brand .logo-mark{width:30px;height:30px;}
  .article-head h1{font-size:26px;}
  .article-body{font-size:16.5px;}
  .related-grid{grid-template-columns:1fr;}
  .post-nav{grid-template-columns:1fr;}
  .post-nav-item.next{text-align:left;}
  .breadcrumb .current{max-width:60vw;}
  .footer-grid{grid-template-columns:1fr;padding:44px 0 30px;}
  .footer-about{max-width:none;}
  .cta-band{padding:28px 22px;border-radius:16px;}
}
@media (max-width:520px){
  .article-meta{gap:10px 16px;}
  .btn{height:46px;padding:0 18px;font-size:15px;}
  .cta-actions .btn{width:100%;}
  .back-to-top{right:14px;bottom:16px;width:42px;height:42px;}
}

/* roulang page: category2 */
:root{
  --c-primary:#1B5FA8;
  --c-primary-700:#14498A;
  --c-primary-100:#E7F0FA;
  --c-accent:#FF6B2C;
  --c-accent-700:#E2541A;
  --c-accent-100:#FFF0E7;
  --c-success:#12A06A;
  --c-success-700:#0C7D52;
  --c-success-100:#E6F6EF;
  --c-danger:#D93F3F;
  --c-ink:#12233A;
  --c-body:#4A5A6E;
  --c-muted:#8A99AB;
  --c-bg:#F4F7FB;
  --c-surface:#FFFFFF;
  --c-line:#E2EAF3;
  --shadow-1:0 1px 2px rgba(18,35,58,.04),0 8px 24px rgba(18,35,58,.06);
  --shadow-2:0 2px 4px rgba(18,35,58,.06),0 16px 36px rgba(18,35,58,.10);
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --h-header:64px;
  --font-cn:"PingFang SC","Noto Sans SC","Microsoft YaHei",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-cn);
  font-size:16px;
  line-height:1.85;
  color:var(--c-body);
  background:var(--c-bg);
  overflow-x:hidden;
}
h1,h2,h3,h4{margin:0;color:var(--c-ink);font-weight:700;letter-spacing:.2px;}
h1{font-size:clamp(30px,4vw,48px);line-height:1.25;}
h2{font-size:30px;line-height:1.35;}
h3{font-size:20px;line-height:1.5;font-weight:600;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--c-primary-700);}
img{max-width:100%;display:block;}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;}
.container{max-width:1200px;margin:0 auto;padding:0 24px;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:40px;padding:0 18px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.2px;
  transition:background-color .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn-lg{height:48px;padding:0 26px;font-size:16px;}
.btn-sm{height:36px;padding:0 14px;font-size:14px;}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:var(--shadow-1);}
.btn-primary:hover{background:var(--c-primary-700);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn-accent{background:var(--c-accent);color:#fff;box-shadow:var(--shadow-1);}
.btn-accent:hover{background:var(--c-accent-700);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn-ghost{background:transparent;color:var(--c-primary);border:1.5px solid var(--c-primary);}
.btn-ghost:hover{background:var(--c-primary-100);color:var(--c-primary-700);transform:translateY(-1px);}
.btn-ghost-light{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.7);}
.btn-ghost-light:hover{background:rgba(255,255,255,.14);color:#fff;transform:translateY(-1px);}
.btn:active{transform:translateY(0);}
.btn[disabled]{opacity:.5;cursor:not-allowed;transform:none;}
.btn-block{width:100%;}
.link-more{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--c-primary);}
.link-more::after{content:"→";transition:transform .2s ease;}
.link-more:hover::after{transform:translateX(4px);}

/* ============ 徽章 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);
  font-size:12px;line-height:1;font-weight:600;letter-spacing:.4px;
}
.badge-primary{background:var(--c-primary-100);color:var(--c-primary-700);}
.badge-accent{background:var(--c-accent-100);color:var(--c-accent-700);}
.badge-success{background:var(--c-success-100);color:var(--c-success-700);}
.badge-soft{background:#EEF3F9;color:var(--c-body);}
.badge-light{background:rgba(255,255,255,.16);color:#fff;}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:var(--shadow-1);}
.header-inner{
  height:var(--h-header);
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.nav-left{display:flex;align-items:center;gap:28px;flex:0 1 60%;min-width:0;}
.nav-right{
  display:flex;align-items:center;gap:16px;flex:0 0 auto;
  padding-left:24px;border-left:1px solid var(--c-line);
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-mark{width:34px;height:34px;flex-shrink:0;}
.brand-text{font-size:18px;font-weight:700;color:var(--c-ink);letter-spacing:.2px;}
.brand-text em{font-style:normal;color:var(--c-accent);}
.main-nav{display:flex;align-items:center;gap:24px;}
.main-nav a{
  position:relative;padding:6px 0;font-size:15px;font-weight:500;color:var(--c-body);
  border-bottom:2px solid transparent;
}
.main-nav a:hover{color:var(--c-primary);}
.main-nav a.active{color:var(--c-primary);font-weight:700;border-bottom-color:var(--c-primary);}
.nav-search{
  display:flex;align-items:center;gap:8px;
  height:38px;padding:0 6px 0 12px;
  background:#F7FAFD;border:1px solid var(--c-line);border-radius:var(--r-pill);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.nav-search:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 3px var(--c-primary-100);}
.nav-search input{
  width:132px;border:0;background:transparent;outline:none;font-size:14px;color:var(--c-ink);
}
.nav-search input::placeholder{color:var(--c-muted);}
.nav-search button{
  display:flex;align-items:center;justify-content:center;
  width:28px;height:28px;border-radius:50%;color:var(--c-primary);
  transition:background-color .2s ease;
}
.nav-search button:hover{background:var(--c-primary-100);}
.nav-sub{font-size:14px;font-weight:500;color:var(--c-body);}
.nav-sub:hover{color:var(--c-primary);}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:8px;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
  transition:background-color .2s ease;
}
.nav-toggle:hover{background:var(--c-primary-100);}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--c-ink);border-radius:2px;transition:transform .25s ease,opacity .25s ease;}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.mobile-drawer{
  position:fixed;left:0;right:0;top:var(--h-header);bottom:0;z-index:55;
  background:#fff;border-top:1px solid var(--c-line);
  padding:20px 24px 28px;
  display:flex;flex-direction:column;justify-content:space-between;
  overflow-y:auto;
}
.drawer-nav{display:flex;flex-direction:column;gap:2px;}
.drawer-nav a{
  padding:14px 12px;border-radius:10px;font-size:16px;font-weight:600;color:var(--c-ink);
  transition:background-color .2s ease,color .2s ease;
}
.drawer-nav a:hover{background:var(--c-primary-100);color:var(--c-primary-700);}
.drawer-nav a.active{background:var(--c-primary-100);color:var(--c-primary-700);}
.drawer-foot{padding-top:20px;border-top:1px solid var(--c-line);}

/* ============ 通用板块 ============ */
.section{padding:88px 0;}
.section-alt{background:#fff;border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);}
.section-head{max-width:720px;margin-bottom:44px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:1.2px;color:var(--c-success-700);
  text-transform:none;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--c-success);border-radius:2px;}
.section-head h2{margin-top:12px;}
.section-head p{margin-top:14px;font-size:16px;color:var(--c-body);}

/* ============ 分类头部条 ============ */
.page-hero{
  position:relative;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(18,35,58,.92) 0%,rgba(18,35,58,.82) 48%,rgba(27,95,168,.72) 100%);
}
.page-hero .container{position:relative;z-index:2;}
.hero-grid{
  display:grid;grid-template-columns:6fr 5fr;gap:48px;align-items:center;
  padding:72px 0 64px;
}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,.72);margin-bottom:18px;}
.breadcrumb a{color:rgba(255,255,255,.82);}
.breadcrumb a:hover{color:#fff;}
.breadcrumb span.sep{color:rgba(255,255,255,.45);}
.breadcrumb .current{color:#fff;font-weight:600;}
.page-hero h1{color:#fff;max-width:16em;}
.hero-desc{margin-top:20px;font-size:17px;line-height:1.85;color:rgba(255,255,255,.86);max-width:34em;}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-card{
  background:var(--c-surface);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--shadow-2);
}
.hero-card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--c-line);}
.hero-card-head h3{font-size:17px;}
.hero-card ul{margin-top:6px;}
.hero-card li{
  display:flex;gap:12px;padding:14px 0;border-bottom:1px dashed var(--c-line);
  font-size:15px;color:var(--c-body);
}
.hero-card li:last-child{border-bottom:0;padding-bottom:0;}
.hero-card .dot{
  flex-shrink:0;width:24px;height:24px;border-radius:50%;
  background:var(--c-success-100);color:var(--c-success-700);
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;font-variant-numeric:tabular-nums;
}
.hero-card .metric-row{
  display:flex;gap:16px;margin-top:20px;padding-top:18px;border-top:1px solid var(--c-line);
}
.hero-card .metric{flex:1;}
.hero-card .metric b{
  display:block;font-size:26px;font-weight:700;color:var(--c-ink);
  font-variant-numeric:tabular-nums;line-height:1.3;
}
.hero-card .metric span{font-size:13px;color:var(--c-muted);}

/* ============ 概览特性卡 ============ */
.overview-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--shadow-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--c-primary-100);}
.card-icon{
  width:44px;height:44px;border-radius:12px;
  background:var(--c-success-100);color:var(--c-success-700);
  display:flex;align-items:center;justify-content:center;margin-bottom:18px;
}
.card-icon svg{width:22px;height:22px;}
.card h3{font-size:18px;margin-bottom:10px;}
.card p{font-size:15px;line-height:1.8;color:var(--c-body);}
.card .card-tag{margin-top:16px;display:inline-flex;}

/* ============ 图文交替 ============ */
.feature-row{
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
  padding:44px 0;
}
.feature-row + .feature-row{border-top:1px solid var(--c-line);}
.feature-row.reverse .feature-media{order:2;}
.feature-desc h3{font-size:24px;line-height:1.4;margin-bottom:14px;}
.feature-desc > p{font-size:16px;color:var(--c-body);}
.feature-list{margin-top:20px;display:flex;flex-direction:column;gap:12px;}
.feature-list li{display:flex;gap:12px;font-size:15px;color:var(--c-body);}
.feature-list .tick{
  flex-shrink:0;width:20px;height:20px;margin-top:5px;border-radius:50%;
  background:var(--c-success-100);color:var(--c-success-700);
  display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;
}
.feature-media{position:relative;}
.feature-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--r-img);box-shadow:var(--shadow-1);
  background:var(--c-primary-100);
}
.feature-media figcaption{margin-top:12px;font-size:13px;color:var(--c-muted);}
.float-chip{
  position:absolute;left:18px;bottom:56px;
  background:#fff;border-radius:12px;box-shadow:var(--shadow-2);
  padding:12px 16px;display:flex;align-items:center;gap:10px;
}
.float-chip b{font-size:20px;color:var(--c-success-700);font-variant-numeric:tabular-nums;}
.float-chip span{font-size:12px;color:var(--c-muted);}
.steps{display:flex;flex-direction:column;gap:16px;margin-top:22px;}
.step-item{
  display:flex;gap:16px;padding:16px 18px;border-radius:12px;
  background:#fff;border:1px solid var(--c-line);
}
.step-item .num{
  flex-shrink:0;width:30px;height:30px;border-radius:50%;
  background:var(--c-success);color:#fff;font-weight:700;font-size:14px;
  display:flex;align-items:center;justify-content:center;font-variant-numeric:tabular-nums;
}
.step-item h4{font-size:16px;margin-bottom:4px;}
.step-item p{font-size:14px;color:var(--c-body);}
.quote{
  margin-top:22px;padding:18px 20px;border-left:3px solid var(--c-success);
  background:var(--c-success-100);border-radius:0 12px 12px 0;
}
.quote p{font-size:15px;color:var(--c-ink);}
.quote span{display:block;margin-top:8px;font-size:13px;color:var(--c-muted);}

/* ============ 自查清单与评分 ============ */
.selfcheck-grid{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:start;}
.score-panel{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--shadow-1);
}
.score-panel h3{font-size:19px;margin-bottom:6px;}
.score-panel > p{font-size:14px;color:var(--c-muted);margin-bottom:22px;}
.score-row + .score-row{margin-top:18px;}
.score-head{display:flex;justify-content:space-between;font-size:14px;color:var(--c-body);margin-bottom:8px;}
.score-head b{color:var(--c-ink);font-variant-numeric:tabular-nums;font-weight:700;}
.score-track{height:8px;border-radius:var(--r-pill);background:#EDF2F8;overflow:hidden;}
.score-track i{display:block;height:100%;border-radius:var(--r-pill);background:var(--c-success);}
.score-track i.low{background:var(--c-accent);}
.check-list{display:flex;flex-direction:column;gap:16px;}
.check-item{
  display:flex;gap:14px;padding:18px 20px;background:#fff;
  border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--shadow-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.check-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:var(--c-primary-100);}
.check-item .mark{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;
}
.check-item .mark.yes{background:var(--c-success-100);color:var(--c-success-700);}
.check-item .mark.no{background:#EEF3F9;color:var(--c-muted);}
.check-item h4{font-size:16px;margin-bottom:4px;}
.check-item p{font-size:14px;color:var(--c-body);}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:900px;}
.faq-item{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;transition:box-shadow .22s ease,border-color .22s ease;
}
.faq-item:hover{box-shadow:var(--shadow-1);border-color:var(--c-primary-100);}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 24px;font-size:17px;font-weight:600;color:var(--c-ink);
  transition:background-color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{background:#F8FBFE;}
.faq-item summary::after{
  content:"+";flex-shrink:0;width:26px;height:26px;border-radius:50%;
  background:var(--c-primary-100);color:var(--c-primary-700);
  display:flex;align-items:center;justify-content:center;
  font-size:18px;line-height:1;font-weight:600;
  transition:transform .2s ease,background-color .2s ease;
}
.faq-item[open] summary{background:var(--c-primary-100);}
.faq-item[open] summary::after{content:"−";background:#fff;transform:rotate(180deg);}
.faq-body{padding:18px 24px 22px;border-top:1px solid var(--c-line);font-size:15px;color:var(--c-body);}
.faq-body p + p{margin-top:10px;}

/* ============ CTA 与表单 ============ */
.cta-band{
  position:relative;overflow:hidden;background:var(--c-ink);
  padding:64px 0;
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(135deg,rgba(255,255,255,.07) 0 1px,transparent 1px 16px);
  pointer-events:none;
}
.cta-grid{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;}
.cta-band h2{color:#fff;font-size:30px;}
.cta-band p{margin-top:16px;color:rgba(255,255,255,.78);font-size:16px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.cta-meta{display:flex;flex-wrap:wrap;gap:22px;margin-top:26px;font-size:14px;color:rgba(255,255,255,.68);}
.form-card{
  background:#fff;border-radius:var(--r-card);padding:28px;box-shadow:var(--shadow-2);
}
.form-card h3{font-size:19px;margin-bottom:6px;}
.form-card > p{font-size:14px;color:var(--c-muted);margin-bottom:20px;}
.field{margin-bottom:16px;}
.field label{display:block;font-size:14px;font-weight:600;color:var(--c-ink);margin-bottom:7px;}
.field input,.field select,.field textarea{
  width:100%;min-height:44px;padding:10px 14px;
  border:1px solid var(--c-line);border-radius:var(--r-btn);
  background:#FBFDFF;font-size:15px;color:var(--c-ink);outline:none;
  transition:border-color .2s ease,box-shadow .2s ease,background-color .2s ease;
}
.field textarea{min-height:92px;resize:vertical;line-height:1.7;}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--c-muted) 50%),linear-gradient(135deg,var(--c-muted) 50%,transparent 50%);background-position:calc(100% - 20px) 20px,calc(100% - 14px) 20px;background-size:6px 6px,6px 6px;background-repeat:no-repeat;padding-right:40px;}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--c-primary);box-shadow:0 0 0 3px var(--c-primary-100);background:#fff;}
.agree{display:flex;align-items:flex-start;gap:10px;font-size:13px;color:var(--c-body);margin:6px 0 18px;}
.agree input{width:16px;height:16px;margin-top:4px;accent-color:var(--c-primary);}
.form-note{margin-top:14px;font-size:14px;min-height:22px;color:var(--c-muted);}
.form-note.is-ok{color:var(--c-success-700);font-weight:600;}

/* ============ 页脚 ============ */
.site-footer{background:var(--c-ink);color:var(--c-muted);padding:64px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .logo-mark{width:34px;height:34px;}
.footer-brand span{font-size:18px;font-weight:700;color:#fff;}
.footer-brand em{font-style:normal;color:var(--c-accent);}
.footer-about{font-size:14px;line-height:1.9;color:rgba(255,255,255,.6);max-width:34em;}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.66);}
.footer-col a:hover{color:#fff;}
.footer-contact span{font-size:14px;color:rgba(255,255,255,.66);}
.footer-contact li{display:flex;gap:6px;flex-wrap:wrap;}
.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:rgba(255,255,255,.5);
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .nav-search input{width:106px;}
  .overview-grid{grid-template-columns:repeat(3,1fr);}
}
@media (max-width:1023px){
  .main-nav{display:none;}
  .nav-search{display:none;}
  .nav-sub{display:none;}
  .nav-right{border-left:0;padding-left:0;}
  .nav-toggle{display:flex;}
  .nav-left{flex:1 1 auto;}
  .hero-grid{grid-template-columns:1fr;gap:36px;padding:56px 0 52px;}
  .page-hero h1{max-width:none;}
  .cta-grid{grid-template-columns:1fr;gap:34px;}
  .selfcheck-grid{grid-template-columns:1fr;gap:26px;}
  .overview-grid{grid-template-columns:repeat(2,1fr);}
  .section{padding:64px 0;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .section{padding:48px 0;}
  h2{font-size:24px;}
  .header-inner{gap:14px;}
  .feature-row{grid-template-columns:1fr;gap:26px;padding:34px 0;}
  .feature-row.reverse .feature-media{order:0;}
  .feature-desc h3{font-size:20px;}
  .overview-grid{grid-template-columns:1fr;gap:18px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
  .footer-about{max-width:none;}
  .cta-band{padding:48px 0;}
  .form-card{padding:22px;}
  .faq-item summary{padding:16px 18px;font-size:16px;}
  .faq-body{padding:16px 18px 20px;}
  .float-chip{left:12px;bottom:46px;padding:10px 13px;}
}
@media (max-width:480px){
  body{font-size:15px;}
  h1{font-size:26px;}
  .btn{width:100%;}
  .btn.btn-sm{width:auto;}
  .hero-actions .btn,.cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .hero-card .metric-row{flex-direction:column;gap:12px;}
}