/* roulang page: index */
:root{
  --brand:#2A6BB8;
  --brand-dark:#1E4E8C;
  --brand-light:#E7EFFA;
  --accent:#E07A2F;
  --accent-light:#FDEFE1;
  --bg:#F5F7FA;
  --card:#FFFFFF;
  --sub-bg:#EDF2F8;
  --line:#DFE6EF;
  --text:#16212E;
  --text-2:#55677A;
  --text-3:#8A9AAC;
  --ok:#2F9E7B;
  --err:#D9503F;
  --r-sm:6px;
  --r-card:14px;
  --r-panel:18px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(22,33,46,.05),0 6px 18px rgba(22,33,46,.06);
  --sh-2:0 10px 28px rgba(22,33,46,.10);
  --sh-3:0 18px 44px rgba(22,33,46,.14);
  --nav-w:248px;
  --gap:20px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block;border:0}
a{color:var(--brand);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-dark)}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}

/* ---------- 布局骨架 ---------- */
.layout{display:flex;min-height:100vh}
.main-wrap{flex:1;min-width:0;margin-left:var(--nav-w);display:flex;flex-direction:column}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 40px}
.section{padding:88px 0;border-top:1px solid var(--line)}
.section:first-of-type{border-top:0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.section-head h2{position:relative;padding-left:14px;font-size:26px;line-height:1.35;font-weight:700;letter-spacing:0}
.section-head h2::before{content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:2px;background:var(--brand)}
.section-head p{margin-top:8px;color:var(--text-2);font-size:14px;line-height:1.7}
.section-link{white-space:nowrap;font-size:14px;font-weight:600;text-decoration:underline;text-underline-offset:3px}

/* ---------- 左侧竖向导航 ---------- */
.sidenav{
  position:fixed;top:0;left:0;bottom:0;width:var(--nav-w);
  background:#fff;border-right:1px solid var(--line);
  display:flex;flex-direction:column;
  box-shadow:inset -1px 0 0 rgba(22,33,46,.02);
  z-index:60;
}
.brand{display:flex;align-items:center;gap:12px;padding:24px 20px 20px;border-bottom:1px solid var(--line)}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;border-radius:12px;
  background:var(--brand);position:relative;display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 16px rgba(42,107,184,.28);
}
.brand-mark::before{
  content:"";width:15px;height:24px;border:1.6px solid #fff;border-radius:4px;display:block;
}
.brand-mark::after{
  content:"";position:absolute;right:8px;top:9px;width:6px;height:6px;border-radius:50%;background:var(--accent);
}
.brand-text strong{display:block;font-size:15px;font-weight:700;letter-spacing:0;line-height:1.35;color:var(--text)}
.brand-text span{display:block;font-size:11px;color:var(--text-3);letter-spacing:.02em}
.nav-group{padding:22px 20px 0}
.nav-group + .nav-group{padding-top:20px}
.nav-group h3{font-size:12px;font-weight:600;color:var(--text-3);letter-spacing:.04em;margin-bottom:8px}
.nav-list li + li{margin-top:2px}
.nav-list a{
  position:relative;display:flex;align-items:center;height:44px;padding:0 12px 0 14px;
  border-radius:10px;color:var(--text-2);font-size:14px;font-weight:500;
  transition:background .18s ease,color .18s ease;
}
.nav-list a::before{
  content:"";position:absolute;left:0;top:11px;bottom:11px;width:3px;border-radius:2px;background:transparent;
  transition:background .18s ease;
}
.nav-list a:hover{background:var(--brand-light);color:var(--brand-dark)}
.nav-list a.active{background:var(--brand-light);color:var(--brand-dark);font-weight:600}
.nav-list a.active::before{background:var(--accent)}
.nav-foot{margin-top:auto;padding:20px}
.nav-card{
  background:var(--sub-bg);border-radius:var(--r-panel);padding:18px;border:1px solid var(--line);
}
.nav-card .label{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--text-2);font-weight:600}
.nav-card .label i{width:6px;height:6px;border-radius:50%;background:var(--accent);display:block;flex:0 0 6px}
.nav-card .clock{margin-top:8px;font-size:18px;font-weight:700;color:var(--brand-dark);letter-spacing:-.01em}
.nav-card p{margin-top:6px;font-size:12px;line-height:1.6;color:var(--text-3)}
.nav-card .btn{width:100%;margin-top:12px}

/* ---------- 移动顶栏与抽屉 ---------- */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:56px;z-index:70;
  background:#fff;border-bottom:1px solid var(--line);align-items:center;gap:12px;padding:0 14px;
  transition:box-shadow .2s ease;
}
.topbar.scrolled{box-shadow:0 6px 18px rgba(22,33,46,.10)}
.topbar .brand{padding:0;border:0;gap:10px;flex:1;min-width:0}
.topbar .brand-mark{width:34px;height:34px;flex:0 0 34px;border-radius:10px}
.topbar .brand-mark::before{width:13px;height:20px}
.topbar .brand-mark::after{right:7px;top:7px;width:5px;height:5px}
.topbar .brand-text strong{font-size:14px}
.burger{
  width:40px;height:40px;border:1px solid var(--line);background:#fff;border-radius:10px;
  display:flex;align-items:center;justify-content:center;cursor:pointer;
}
.burger span{display:block;width:18px;height:1.6px;background:var(--text);position:relative}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:18px;height:1.6px;background:var(--text)}
.burger span::before{top:-6px}
.burger span::after{top:6px}
.overlay{
  position:fixed;inset:0;background:rgba(22,33,46,.45);opacity:0;visibility:hidden;
  transition:opacity .22s ease,visibility .22s ease;z-index:80;
}
.overlay.show{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;left:0;bottom:0;width:280px;background:#fff;z-index:90;
  transform:translateX(-100%);transition:transform .26s cubic-bezier(.4,0,.2,1);
  display:flex;flex-direction:column;overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer .drawer-head{display:flex;align-items:center;justify-content:space-between;padding:18px 18px 14px;border-bottom:1px solid var(--line)}
.drawer-close{
  width:34px;height:34px;border-radius:9px;border:1px solid var(--line);background:#fff;
  cursor:pointer;font-size:16px;color:var(--text-2);display:flex;align-items:center;justify-content:center;
}
.drawer .nav-group{padding:18px 18px 0}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;letter-spacing:0;cursor:pointer;border:1px solid transparent;
  transition:transform .16s ease,box-shadow .16s ease,background .16s ease,color .16s ease,border-color .16s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(224,122,47,.24)}
.btn-primary:hover{background:#cf6c23;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;border-color:var(--brand);color:var(--brand)}
.btn-ghost:hover{background:var(--brand-light);color:var(--brand-dark)}
.btn-sm{height:38px;padding:0 16px;font-size:13px}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none}
.btn-block{width:100%}
.spinner{
  width:15px;height:15px;border-radius:50%;border:2px solid rgba(255,255,255,.45);
  border-top-color:#fff;animation:spin .8s linear infinite;display:none;
}
.btn.loading .spinner{display:block}
.btn.loading{pointer-events:none;opacity:.85}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- 倒计时条 ---------- */
.countdown{
  position:sticky;top:0;z-index:40;
  background:var(--brand-light);border-bottom:1px solid var(--line);
}
.countdown-inner{display:flex;align-items:center;gap:18px;padding:12px 0}
.badge-live{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--accent);color:#fff;font-size:12px;font-weight:700;flex:0 0 auto;
}
.badge-live i{width:6px;height:6px;border-radius:50%;background:#fff;display:block;animation:blink 1.4s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.25}}
.countdown-tip{font-size:13px;color:var(--brand-dark);font-weight:600;flex:1;min-width:0}
.clock-row{display:flex;align-items:center;gap:8px}
.clock-cell{
  min-width:56px;padding:6px 8px;background:#fff;border-radius:10px;text-align:center;
  box-shadow:var(--sh-1);
}
.clock-cell b{display:block;font-size:20px;font-weight:700;line-height:1.1;color:var(--brand-dark);letter-spacing:-.01em}
.clock-cell span{display:block;font-size:11px;color:var(--text-3);line-height:1.4}
.countdown .btn{flex:0 0 auto}

/* ---------- Hero ---------- */
.hero{padding:72px 0 88px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:28px;padding:0 14px;border-radius:var(--r-pill);
  background:var(--brand-light);color:var(--brand-dark);font-size:12px;font-weight:600;margin-bottom:18px;
}
.hero h1{font-size:clamp(30px,3.6vw,44px);line-height:1.2;font-weight:700;letter-spacing:0}
.hero .lede{margin-top:16px;font-size:18px;line-height:1.7;color:var(--text-2);max-width:30em}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-points{display:flex;flex-wrap:wrap;margin-top:34px;border-top:1px solid var(--line)}
.hero-points li{flex:1 1 150px;min-width:140px;padding:18px 18px 0 0;position:relative}
.hero-points li + li{padding-left:18px;border-left:1px solid var(--line)}
.hero-points b{display:block;font-size:13px;color:var(--accent);font-weight:700;letter-spacing:.06em}
.hero-points strong{display:block;margin-top:4px;font-size:15px;font-weight:600;color:var(--text)}
.hero-points span{display:block;margin-top:4px;font-size:13px;color:var(--text-3);line-height:1.6}
.hero-media{position:relative;border-radius:16px;overflow:hidden;box-shadow:var(--sh-2);aspect-ratio:16/10}
.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-media .corner{
  position:absolute;left:16px;bottom:16px;display:inline-flex;align-items:center;gap:7px;
  background:#fff;color:var(--brand-dark);font-size:12px;font-weight:700;
  padding:7px 14px;border-radius:var(--r-pill);box-shadow:var(--sh-1);
}
.hero-media .corner svg{width:14px;height:14px;stroke:var(--brand);fill:none;stroke-width:1.6}

/* ---------- 卖点明细 非对称栅格 ---------- */
.feature-grid{display:grid;grid-template-columns:7fr 5fr;gap:var(--gap)}
.feature-main{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-panel);padding:32px;
  box-shadow:var(--sh-1);display:flex;flex-direction:column;
}
.feature-main .tag{
  align-self:flex-start;font-size:12px;font-weight:600;color:var(--brand-dark);
  background:var(--brand-light);padding:4px 12px;border-radius:var(--r-pill);
}
.feature-main h3{margin-top:16px;font-size:19px;font-weight:600;line-height:1.5}
.feature-main p{margin-top:10px;color:var(--text-2);font-size:15px;line-height:1.85;max-width:44em}
.feature-main figure{margin-top:22px;border-radius:var(--r-card);overflow:hidden;aspect-ratio:16/9}
.feature-main figure img{width:100%;height:100%;object-fit:cover}
.feature-side{display:flex;flex-direction:column;gap:var(--gap)}
.strip{
  flex:1;display:flex;gap:16px;align-items:flex-start;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-panel);padding:24px;
  box-shadow:var(--sh-1);transition:transform .18s ease,box-shadow .18s ease;
}
.strip:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.strip .idx{
  flex:0 0 40px;height:40px;border-radius:12px;background:var(--brand-light);color:var(--brand-dark);
  display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;letter-spacing:.02em;
}
.strip h3{font-size:17px;font-weight:600;line-height:1.5}
.strip p{margin-top:6px;font-size:14px;color:var(--text-2);line-height:1.75}
.strip ul{margin-top:10px;display:flex;flex-wrap:wrap;gap:8px}
.strip ul li{
  font-size:12px;color:var(--text-2);background:var(--sub-bg);border-radius:var(--r-pill);padding:3px 10px;
}

/* ---------- Bento 图墙 ---------- */
.bento{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:132px;gap:var(--gap)}
.bento-item{
  position:relative;border-radius:var(--r-card);overflow:hidden;background:var(--sub-bg);
  box-shadow:var(--sh-1);transition:transform .2s ease,box-shadow .2s ease;
}
.bento-item img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.bento-item:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.bento-item:hover img{transform:scale(1.03)}
.bento-item .cap{
  position:absolute;left:0;right:0;bottom:0;padding:22px 16px 14px;
  background:linear-gradient(to top,rgba(255,255,255,.96),rgba(255,255,255,.78) 55%,rgba(255,255,255,0));
  font-size:13px;font-weight:600;color:var(--text);
}
.bento-item .cap small{display:block;font-weight:400;color:var(--text-3);font-size:12px;margin-top:2px}
.b-a{grid-column:span 2;grid-row:span 2}
.b-b,.b-c,.b-d,.b-e{grid-column:span 1;grid-row:span 1}
.b-f{grid-column:span 2;grid-row:span 1}
.b-stat{
  grid-column:span 2;grid-row:span 1;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:18px 22px;display:flex;flex-direction:column;justify-content:center;box-shadow:var(--sh-1);
}
.b-stat b{font-size:24px;font-weight:700;color:var(--brand-dark);letter-spacing:-.01em}
.b-stat span{font-size:13px;color:var(--text-2);margin-top:2px}

/* ---------- 表单 CTA ---------- */
.signup{background:var(--brand-light);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.signup-inner{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;padding:76px 0}
.signup-copy h2{font-size:26px;font-weight:700;line-height:1.35}
.signup-copy p{margin-top:14px;color:var(--text-2);font-size:15px;max-width:34em}
.signup-copy ul{margin-top:22px}
.signup-copy ul li{position:relative;padding-left:24px;font-size:14px;color:var(--text-2);margin-top:10px}
.signup-copy ul li::before{
  content:"";position:absolute;left:0;top:.62em;width:10px;height:10px;border-radius:3px;background:var(--brand);
}
.form-card{background:#fff;border-radius:var(--r-panel);padding:32px;box-shadow:var(--sh-2)}
.form-card h3{font-size:18px;font-weight:600}
.form-card .hint{margin-top:6px;font-size:13px;color:var(--text-3)}
.field{margin-top:18px}
.field label{display:block;font-size:14px;font-weight:600;color:var(--text);margin-bottom:7px}
.field label em{font-style:normal;color:var(--err);margin-left:3px}
.field input,.field select{
  width:100%;height:46px;padding:0 14px;border:1px solid var(--line);border-radius:10px;
  background:#fff;font-size:15px;transition:border-color .18s ease,box-shadow .18s ease;
}
.field input::placeholder{color:var(--text-3)}
.field input:focus,.field select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(42,107,184,.14)}
.field.error input,.field.error select{border-color:var(--err);border-left-width:3px}
.field .msg{display:none;margin-top:6px;font-size:12px;color:var(--err)}
.field.error .msg{display:block}
.check{display:flex;gap:10px;align-items:flex-start;margin-top:20px}
.check input{width:18px;height:18px;margin-top:2px;accent-color:var(--brand);flex:0 0 18px}
.check span{font-size:13px;color:var(--text-2);line-height:1.7}
.form-note{margin-top:14px;font-size:12px;color:var(--text-3);line-height:1.7}
.form-ok{
  display:none;margin-top:16px;padding:12px 16px;border-left:3px solid var(--ok);
  background:#F1F9F6;border-radius:var(--r-sm);font-size:13px;color:#1F6B54;
}
.form-ok.show{display:block}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;transition:box-shadow .18s ease}
.faq-item.open{box-shadow:var(--sh-1)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;text-align:left;
  padding:20px 24px;background:none;border:0;cursor:pointer;font-size:16px;font-weight:600;color:var(--text);
  position:relative;
}
.faq-q::before{content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;background:transparent;border-radius:0 2px 2px 0;transition:background .18s ease}
.faq-item.open .faq-q::before{background:var(--accent)}
.faq-q svg{width:18px;height:18px;stroke:var(--text-2);fill:none;stroke-width:1.6;flex:0 0 18px;transition:transform .22s ease}
.faq-item.open .faq-q svg{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-a p{padding:0 24px 22px 24px;font-size:15px;color:var(--text-2);line-height:1.85}

/* ---------- 资讯列表 ---------- */
.news-list{display:flex;flex-direction:column;border-top:1px solid var(--line)}
.news-item{
  display:flex;gap:22px;align-items:center;padding:22px 4px;border-bottom:1px solid var(--line);
  transition:background .18s ease;
}
.news-item:hover{background:#fff}
.news-thumb{
  flex:0 0 168px;width:168px;height:104px;border-radius:var(--r-card);overflow:hidden;background:var(--sub-bg);
}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.news-item:hover .news-thumb img{transform:scale(1.04)}
.news-body{flex:1;min-width:0}
.news-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:12px;color:var(--text-3)}
.chip{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);
  background:var(--brand-light);color:var(--brand-dark);font-size:12px;font-weight:600;
}
.news-body h3{margin-top:8px;font-size:17px;font-weight:600;line-height:1.55}
.news-body h3 a{color:var(--text)}
.news-body h3 a:hover{color:var(--brand)}
.news-body p{
  margin-top:6px;font-size:14px;color:var(--text-2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-arrow{
  flex:0 0 auto;width:34px;height:34px;border-radius:50%;border:1px solid var(--line);background:#fff;
  display:flex;align-items:center;justify-content:center;transition:border-color .18s ease,background .18s ease;
}
.news-arrow svg{width:16px;height:16px;stroke:var(--brand);fill:none;stroke-width:1.8}
.news-item:hover .news-arrow{background:var(--brand-light);border-color:var(--brand)}
.empty{
  border:1px dashed var(--line);border-radius:var(--r-panel);background:#fff;
  padding:56px 24px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:12px;
}
.empty svg{width:36px;height:36px;stroke:var(--text-3);fill:none;stroke-width:1.6}
.empty p{font-size:14px;color:var(--text-2)}
.skeleton{display:flex;flex-direction:column;gap:14px}
.sk-row{display:flex;gap:22px;align-items:center}
.sk-block{
  background:linear-gradient(90deg,#EDF2F8 25%,#F6F9FC 50%,#EDF2F8 75%);
  background-size:200% 100%;animation:shimmer 1.4s infinite linear;border-radius:10px;
}
.sk-thumb{flex:0 0 168px;height:104px;border-radius:var(--r-card)}
.sk-lines{flex:1;display:flex;flex-direction:column;gap:9px}
.sk-lines .sk-block{height:13px}
.sk-lines .sk-block:nth-child(1){width:38%}
.sk-lines .sk-block:nth-child(2){width:82%}
.sk-lines .sk-block:nth-child(3){width:64%}
@keyframes shimmer{0%{background-position:200% 0}100%{background-position:-200% 0}}

/* ---------- 页脚 ---------- */
.site-footer{background:#fff;border-top:1px solid var(--line);margin-top:auto}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px;padding:64px 0 44px}
.footer-grid h4{font-size:14px;font-weight:700;margin-bottom:16px;color:var(--text)}
.footer-about p{margin-top:14px;font-size:13px;color:var(--text-2);line-height:1.85;max-width:30em}
.footer-links li + li{margin-top:10px}
.footer-links a{font-size:13px;color:var(--text-2)}
.footer-links a:hover{color:var(--brand)}
.footer-contact li{font-size:13px;color:var(--text-2);line-height:1.9}
.qr{
  margin-top:16px;width:104px;height:104px;border-radius:12px;border:1px solid var(--line);
  background:var(--sub-bg);display:flex;align-items:center;justify-content:center;
}
.qr svg{width:44px;height:44px;stroke:var(--text-3);fill:none;stroke-width:1.4}
.footer-bottom{
  border-top:1px solid var(--line);padding:18px 0;display:flex;align-items:center;justify-content:space-between;
  gap:16px;flex-wrap:wrap;
}
.footer-bottom p{font-size:12px;color:var(--text-3)}
.to-top{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;
  background:#fff;border:1px solid var(--line);box-shadow:var(--sh-2);cursor:pointer;
  display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;
  transition:opacity .2s ease,visibility .2s ease,transform .2s ease;z-index:50;
}
.to-top.show{opacity:1;visibility:visible}
.to-top:hover{transform:translateY(-2px)}
.to-top svg{width:18px;height:18px;stroke:var(--brand);fill:none;stroke-width:1.8}

/* ---------- 响应式 ---------- */
@media (min-width:1440px){
  .container{max-width:1240px}
}
@media (max-width:1199px){
  :root{--nav-w:208px}
  .bento{grid-template-columns:repeat(3,1fr)}
  .b-a{grid-column:span 2}
  .b-f{grid-column:span 2}
  .b-stat{grid-column:span 1}
  .hero-grid{gap:40px}
}
@media (max-width:1023px){
  .sidenav{display:none}
  .main-wrap{margin-left:0;padding-top:56px}
  .topbar{display:flex}
  .section{padding:64px 0}
  .hero{padding:48px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-media{order:-1;aspect-ratio:16/9}
  .hero-points li{flex:1 1 100%;padding-right:0}
  .hero-points li + li{padding-left:0;border-left:0;border-top:1px solid var(--line);padding-top:14px;margin-top:14px}
  .feature-grid{grid-template-columns:1fr}
  .bento{grid-template-columns:repeat(2,1fr);grid-auto-rows:126px}
  .b-a{grid-column:span 2;grid-row:span 3}
  .b-f{grid-column:span 2}
  .b-stat{grid-column:span 2}
  .signup-inner{grid-template-columns:1fr;gap:32px;padding:60px 0}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px;padding:48px 0 32px}
  .countdown-inner{flex-wrap:wrap;gap:12px}
  .countdown-tip{order:3;flex:1 1 100%}
  .countdown .btn{order:4;width:100%}
}
@media (max-width:767px){
  body{font-size:15px}
  .container{padding:0 20px}
  .section{padding:56px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:26px}
  .section-head h2{font-size:22px}
  .hero h1{font-size:28px}
  .hero .lede{font-size:16px}
  .hero-actions .btn{width:100%}
  .clock-cell{min-width:44px;padding:5px 6px}
  .clock-cell b{font-size:17px}
  .clock-cell span{font-size:10px}
  .bento{grid-template-columns:1fr;grid-auto-rows:170px}
  .b-a,.b-f,.b-stat{grid-column:span 1;grid-row:span 1}
  .b-a{grid-row:span 2}
  .feature-main{padding:24px}
  .strip{padding:20px}
  .form-card{padding:24px}
  .news-item{gap:14px;padding:18px 0}
  .news-thumb{flex:0 0 104px;width:104px;height:76px}
  .news-arrow{display:none}
  .news-body h3{font-size:15px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .to-top{right:16px;bottom:16px}
  .faq-q{padding:16px 18px;font-size:15px}
  .faq-a p{padding:0 18px 18px}
}
@media (max-width:479px){
  .clock-cell{min-width:38px}
  .clock-cell b{font-size:16px}
  .news-thumb{flex:0 0 84px;width:84px;height:64px}
}

/* roulang page: category1 */
:root{
  --brand:#2A6BB8;
  --brand-dark:#1E4E8C;
  --brand-soft:#E7EFFA;
  --accent:#E07A2F;
  --accent-soft:#FDEFE1;
  --bg:#F5F7FA;
  --card:#FFFFFF;
  --soft:#EDF2F8;
  --line:#DFE6EF;
  --text:#16212E;
  --text-2:#55677A;
  --text-3:#8A9AAC;
  --ok:#2F9E7B;
  --err:#D9503F;
  --r-s:6px;
  --r-c:14px;
  --r-p:18px;
  --r-pill:999px;
  --sh1:0 1px 2px rgba(22,33,46,.05),0 6px 18px rgba(22,33,46,.06);
  --sh2:0 10px 28px rgba(22,33,46,.10);
  --sh3:0 18px 44px rgba(22,33,46,.14);
  --side-w:248px;
  --sec-pad:88px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer;background:none;border:0}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.skip-link{position:absolute;left:-9999px;top:0;background:#fff;padding:10px 16px;border-radius:0 0 var(--r-s) 0;z-index:200}
.skip-link:focus{left:0}

/* ---------- 布局骨架 ---------- */
.layout{min-height:100vh}
.main-col{margin-left:var(--side-w);min-height:100vh;display:flex;flex-direction:column}
.container{max-width:1180px;margin:0 auto;padding:0 40px;width:100%}
.main-col > main{flex:1 1 auto}

/* ---------- 左侧竖向导航 ---------- */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--side-w);
  background:#fff;border-right:1px solid var(--line);
  box-shadow:inset -1px 0 0 rgba(22,33,46,.02);
  display:flex;flex-direction:column;gap:22px;
  padding:22px 18px;overflow-y:auto;z-index:70;
}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{
  width:34px;height:34px;border-radius:9px;flex:none;position:relative;
  background:var(--brand-soft);border:1px solid #d3e0f2;
}
.brand-mark::before{
  content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:13px;height:21px;border:1.6px solid var(--brand);border-radius:3.5px;
}
.brand-mark::after{
  content:"";position:absolute;right:4px;top:5px;width:6px;height:6px;border-radius:50%;background:var(--accent);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:15.5px;font-weight:700;letter-spacing:0}
.brand-text span{font-size:12px;color:var(--text-3)}

.nav-group{margin-top:4px}
.nav-title{font-size:12px;color:var(--text-3);letter-spacing:.02em;padding:0 12px;margin-bottom:8px}
.nav-list{display:flex;flex-direction:column;gap:2px}
.nav-link{
  position:relative;display:flex;align-items:center;height:44px;padding:0 12px 0 16px;
  border-radius:8px;font-size:14.5px;color:var(--text-2);
  transition:background .18s,color .18s;
}
.nav-link::before{
  content:"";position:absolute;left:4px;top:12px;bottom:12px;width:3px;border-radius:2px;background:transparent;transition:background .18s;
}
.nav-link:hover{background:var(--brand-soft);color:var(--brand-dark)}
.nav-link.active{background:var(--brand-soft);color:var(--brand-dark);font-weight:600}
.nav-link.active::before{background:var(--brand)}

.side-card{
  margin-top:auto;background:var(--soft);border:1px solid var(--line);
  border-radius:var(--r-p);padding:16px 14px;display:flex;flex-direction:column;gap:10px;
}
.side-card-label{font-size:12px;color:var(--text-3)}
.side-clock{
  display:flex;align-items:baseline;gap:4px;font-size:22px;font-weight:700;color:var(--brand-dark);
  font-variant-numeric:tabular-nums;letter-spacing:-.01em;
}
.side-clock i{font-style:normal;font-size:14px;color:var(--text-3);font-weight:600;margin-left:2px}
.side-card-note{font-size:12px;color:var(--text-2);line-height:1.6}
.btn-block{width:100%}

/* ---------- 移动端顶栏 ---------- */
.topbar{
  display:none;position:sticky;top:0;z-index:80;
  align-items:center;gap:12px;height:56px;padding:0 16px;
  background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow .2s;
}
.topbar.scrolled{box-shadow:0 6px 18px rgba(22,33,46,.08)}
.topbar .brand{margin-right:auto}
.topbar .brand-text strong{font-size:14.5px}
.topbar .brand-text span{display:none}
.burger{
  width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);background:#fff;flex:none;
}
.burger span{display:block;width:16px;height:2px;border-radius:2px;background:var(--text);position:relative}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:16px;height:2px;border-radius:2px;background:var(--text)}
.burger span::before{top:-5px}
.burger span::after{top:5px}
.sidebar-mask{
  position:fixed;inset:0;background:rgba(22,33,46,.45);
  opacity:0;visibility:hidden;transition:opacity .24s;z-index:65;
}

/* ---------- 按钮 / 徽章 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:transform .18s,box-shadow .18s,background .18s,color .18s,border-color .18s;
  white-space:nowrap;
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(224,122,47,.26)}
.btn-primary:hover{background:#cf6d24;transform:translateY(-1px);box-shadow:var(--sh2)}
.btn-ghost{background:#fff;color:var(--brand);border-color:#c7daf1}
.btn-ghost:hover{background:var(--brand-soft)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-lg{height:52px;padding:0 28px;font-size:16px}
.btn:disabled{opacity:.45;pointer-events:none}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;
  border-radius:var(--r-pill);font-size:12.5px;font-weight:600;
  background:var(--brand-soft);color:var(--brand-dark);
}
.badge-accent{background:var(--accent-soft);color:#B75E17}

/* ---------- 首屏 ---------- */
.hero{padding:56px 0 64px;background:linear-gradient(180deg,#FBFCFE 0%,var(--bg) 100%);border-bottom:1px solid var(--line)}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:18px}
.crumb a{color:var(--text-2)}
.crumb a:hover{color:var(--brand)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{
  font-size:clamp(30px,3.6vw,44px);line-height:1.2;font-weight:700;letter-spacing:0;
}
.hero-sub{margin-top:14px;font-size:18px;color:var(--brand-dark);font-weight:600;line-height:1.6}
.hero-desc{margin-top:14px;color:var(--text-2);font-size:15.5px;max-width:560px}
.hero-actions{display:flex;gap:14px;margin-top:28px;flex-wrap:wrap}
.hero-seq{display:flex;gap:0;margin-top:34px;border-top:1px solid var(--line);padding-top:20px}
.hero-seq li{
  flex:1;font-size:13.5px;color:var(--text-2);padding-right:18px;
  border-right:1px solid var(--line);
}
.hero-seq li:last-child{border-right:0;padding-right:0}
.hero-seq li span{
  display:block;font-size:13px;font-weight:700;color:var(--accent);
  font-variant-numeric:tabular-nums;margin-bottom:4px;
}
.hero-seq li + li{padding-left:18px}
.hero-media{position:relative;border-radius:16px;overflow:hidden;box-shadow:var(--sh2);aspect-ratio:16/10;background:var(--soft)}
.hero-media img{width:100%;height:100%;object-fit:cover}
.tag-float{
  position:absolute;left:16px;bottom:16px;
  background:rgba(255,255,255,.94);color:var(--brand-dark);
  font-size:12.5px;font-weight:600;padding:7px 14px;border-radius:var(--r-pill);
  box-shadow:0 4px 12px rgba(22,33,46,.12);
}

/* ---------- 指标条 ---------- */
.metrics{background:#fff;border-bottom:1px solid var(--line)}
.metric-row{display:grid;grid-template-columns:repeat(4,1fr);gap:0;padding-top:0;padding-bottom:0}
.metric{padding:26px 24px;border-right:1px solid var(--line)}
.metric:last-child{border-right:0}
.metric strong{
  display:block;font-size:24px;font-weight:700;color:var(--brand-dark);
  font-variant-numeric:tabular-nums;letter-spacing:-.01em;line-height:1.3;
}
.metric span{display:block;font-size:13px;color:var(--text-3);margin-top:4px}

/* ---------- 通用板块 ---------- */
.section{padding:var(--sec-pad) 0}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;position:relative}
.section-head::after{
  content:"";position:absolute;right:0;bottom:6px;width:88px;height:1px;background:var(--line);
}
.sec-title{font-size:26px;line-height:1.35;font-weight:700;padding-left:14px;position:relative}
.sec-title::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--brand);
}
.sec-sub{margin-top:8px;font-size:14px;color:var(--text-3);padding-left:14px}
.link-more{font-size:14px;color:var(--brand);font-weight:600;border-bottom:1px solid transparent;transition:border-color .18s}
.link-more:hover{border-color:var(--brand)}

/* ---------- 纵向图文流 ---------- */
.flow-list{border-top:1px solid var(--line);border-radius:var(--r-c)}
.flow-item{
  display:grid;grid-template-columns:200px 1fr auto;gap:26px;align-items:center;
  padding:24px 12px;border-bottom:1px solid var(--line);
  border-radius:12px;transition:background .18s;
}
.flow-item:hover{background:#FBFCFE}
.flow-thumb{width:200px;height:124px;border-radius:12px;overflow:hidden;background:var(--soft);flex:none}
.flow-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s}
.flow-item:hover .flow-thumb img{transform:scale(1.04)}
.flow-body{min-width:0}
.flow-idx{
  display:inline-block;font-size:12.5px;font-weight:700;color:var(--accent);
  font-variant-numeric:tabular-nums;letter-spacing:.04em;margin-bottom:6px;
}
.flow-body h3{font-size:19px;font-weight:600;line-height:1.5;margin-bottom:8px}
.flow-body p{font-size:14.5px;color:var(--text-2);line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.flow-more{
  display:inline-flex;align-items:center;gap:8px;font-size:13.5px;font-weight:600;
  color:var(--brand);padding:10px 6px 10px 14px;border-radius:var(--r-pill);transition:background .18s,gap .18s;
}
.flow-more:hover{background:var(--brand-soft)}
.flow-more svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;transition:transform .18s}
.flow-more:hover svg{transform:translateX(3px)}

/* ---------- FAQ ---------- */
.faq-list{max-width:880px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-c);
  margin-bottom:14px;overflow:hidden;transition:box-shadow .2s,border-color .2s;
}
.faq-item.open{border-color:#c7daf1;box-shadow:var(--sh1)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  text-align:left;padding:20px 22px;font-size:16px;font-weight:600;position:relative;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:0 2px 2px 0;
  background:transparent;transition:background .2s;
}
.faq-item.open .faq-q::before{background:var(--accent)}
.faq-icon{flex:none;width:20px;height:20px;stroke:var(--brand);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:transform .25s}
.faq-item.open .faq-icon{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a p{padding:0 22px 22px;font-size:15px;color:var(--text-2);line-height:1.85}

/* ---------- CTA 条 ---------- */
.cta-band{
  background:var(--brand-soft);border-top:1px solid #d9e6f7;border-bottom:1px solid #d9e6f7;
  padding:60px 0;
}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:40px}
.cta-inner h2{font-size:24px;font-weight:700;line-height:1.4}
.cta-inner p{margin-top:10px;font-size:14.5px;color:var(--text-2);max-width:620px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;flex:none}

/* ---------- 页脚 ---------- */
.site-footer{background:#fff;border-top:1px solid var(--line);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:44px;padding-bottom:44px}
.footer-about p{margin-top:16px;font-size:14px;color:var(--text-2);line-height:1.8;max-width:340px}
.site-footer h4{font-size:14px;font-weight:700;margin-bottom:16px}
.footer-links{display:grid;gap:10px}
.footer-links a{font-size:14px;color:var(--text-2);transition:color .18s}
.footer-links a:hover{color:var(--brand)}
.footer-contact li{font-size:13.5px;color:var(--text-2);line-height:1.7}
.qr{
  margin-top:16px;width:76px;height:76px;border-radius:12px;background:#fff;
  border:1px solid var(--line);display:flex;align-items:center;justify-content:center;
}
.qr svg{width:44px;height:44px;fill:none;stroke:var(--brand);stroke-width:1.4}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  border-top:1px solid var(--line);padding:20px 0;font-size:13px;color:var(--text-3);
}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;
  background:#fff;border:1px solid var(--line);box-shadow:var(--sh1);
  display:flex;align-items:center;justify-content:center;z-index:90;
  opacity:0;visibility:hidden;transform:translateY(8px);transition:all .22s;
}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top svg{width:18px;height:18px;stroke:var(--brand);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* ---------- 响应式 ---------- */
@media(max-width:1439px){
  .container{max-width:1180px}
}
@media(min-width:1440px){
  .container{max-width:1240px}
}
@media(max-width:1199px){
  :root{--side-w:208px}
  .flow-item{grid-template-columns:170px 1fr auto;gap:20px}
  .flow-thumb{width:170px;height:106px}
}
@media(max-width:1023px){
  :root{--sec-pad:64px}
  .sidebar{
    transform:translateX(-100%);transition:transform .26s ease;box-shadow:var(--sh3);width:280px;
  }
  .main-col{margin-left:0}
  .topbar{display:flex}
  body.drawer-open .sidebar{transform:none}
  body.drawer-open .sidebar-mask{opacity:1;visibility:visible}
  body.drawer-open{overflow:hidden}
  .hero{padding:32px 0 48px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-media{order:-1}
  .metric-row{grid-template-columns:repeat(2,1fr)}
  .metric:nth-child(2n){border-right:0}
  .metric:nth-child(1),.metric:nth-child(2){border-bottom:1px solid var(--line)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-inner{flex-direction:column;align-items:flex-start;gap:24px}
}
@media(max-width:767px){
  :root{--sec-pad:56px}
  body{font-size:15px}
  .container{padding:0 20px}
  .sec-title{font-size:22px}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  .section-head::after{display:none}
  .hero-seq{flex-direction:column;gap:12px}
  .hero-seq li{border-right:0;padding:0 0 12px;border-bottom:1px solid var(--line)}
  .hero-seq li + li{padding-left:0}
  .hero-seq li:last-child{border-bottom:0;padding-bottom:0}
  .flow-item{grid-template-columns:1fr;gap:14px;padding:20px 8px}
  .flow-thumb{width:100%;height:170px}
  .flow-more{padding-left:0}
  .hero-actions .btn{flex:1 1 100%}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:6px}
  .faq-q{padding:18px 18px 18px 20px;font-size:15.5px}
  .faq-a p{padding:0 18px 18px 20px}
  .to-top{right:16px;bottom:16px}
}
@media(max-width:479px){
  .metric-row{grid-template-columns:1fr}
  .metric{border-right:0;border-bottom:1px solid var(--line);padding:20px 0}
  .metric:last-child{border-bottom:0}
  .hero h1{font-size:28px}
  .side-clock{font-size:20px}
}

/* roulang page: article */
:root{
  --brand:#2A6BB8;
  --brand-dark:#1E4E8C;
  --brand-soft:#E7EFFA;
  --accent:#E07A2F;
  --accent-dark:#C96A22;
  --accent-soft:#FDEFE1;
  --bg:#F5F7FA;
  --card:#FFFFFF;
  --sub:#EDF2F8;
  --line:#DFE6EF;
  --text:#16212E;
  --text-2:#55677A;
  --text-3:#8A9AAC;
  --ok:#2F9E7B;
  --err:#D9503F;
  --r-sm:6px;
  --r-card:14px;
  --r-panel:18px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(22,33,46,.05),0 6px 18px rgba(22,33,46,.06);
  --sh-2:0 10px 28px rgba(22,33,46,.10);
  --sh-3:0 18px 44px rgba(22,33,46,.14);
  --side-w:248px;
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Helvetica Neue",Arial,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:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-dark)}
button,input,select,textarea{font-family:inherit;font-size:100%;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding-left:20px}
svg{display:block}
.no-scroll{overflow:hidden}
::selection{background:var(--brand-soft);color:var(--brand-dark)}

/* 通用容器 */
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 40px}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:var(--r-pill);
  font-size:14.5px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease,color .18s ease;
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--accent-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:#fff;color:var(--brand-dark);border-color:#BFD5ED}
.btn-outline:hover{background:var(--brand-soft);color:var(--brand-dark);border-color:var(--brand)}
.btn-sm{padding:8px 16px;font-size:13.5px}
.btn-block{width:100%}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.btn[disabled]{opacity:.45;pointer-events:none}

/* 徽章 */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand-dark);
  font-size:13px;font-weight:600;line-height:1;
}
.badge-accent{background:var(--accent-soft);color:#9C5316}

/* 品牌块 */
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{
  position:relative;flex:0 0 auto;
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(160deg,#3B7FCC,#1E4E8C);
}
.brand-mark::before{
  content:"";position:absolute;left:50%;top:50%;
  width:13px;height:21px;transform:translate(-50%,-50%);
  border:1.6px solid #fff;border-radius:4px;
}
.brand-mark::after{
  content:"";position:absolute;left:50%;bottom:7px;
  width:4px;height:4px;border-radius:50%;background:var(--accent);
  transform:translateX(-50%);
}
.brand-text{display:flex;flex-direction:column;line-height:1.28;min-width:0}
.brand-text strong{font-size:15.5px;font-weight:700;color:var(--text);white-space:nowrap}
.brand-text span{font-size:11.5px;color:var(--text-3);white-space:nowrap}

/* 顶栏（移动端） */
.topbar{
  display:none;
  align-items:center;gap:12px;
  position:fixed;top:0;left:0;right:0;height:56px;
  padding:0 16px;background:#fff;border-bottom:1px solid var(--line);
  z-index:60;transition:box-shadow .25s ease;
}
.topbar .brand{flex:1;min-width:0;overflow:hidden}
.topbar.scrolled{box-shadow:0 6px 18px rgba(22,33,46,.10)}
.burger{
  width:38px;height:38px;flex:0 0 auto;
  border:1px solid var(--line);border-radius:10px;background:#fff;
  display:flex;align-items:center;justify-content:center;cursor:pointer;
}
.burger span{position:relative;display:block;width:16px;height:2px;background:var(--text);border-radius:2px}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:16px;height:2px;background:var(--text);border-radius:2px}
.burger span::before{top:-5px}
.burger span::after{top:5px}
.burger:focus-visible{outline:2px solid var(--brand);outline-offset:2px}

/* 两栏骨架 */
.shell{display:flex;align-items:flex-start;min-height:100vh}
.main{flex:1;min-width:0;padding-bottom:0}

/* 左侧导航 */
.sidebar{
  width:var(--side-w);flex:0 0 var(--side-w);
  position:sticky;top:0;height:100vh;
  display:flex;flex-direction:column;
  background:#fff;border-right:1px solid var(--line);
  box-shadow:inset -1px 0 0 rgba(22,33,46,.02);
  padding:22px 16px 22px;
  overflow-y:auto;
}
.side-brand{display:flex;align-items:center;gap:10px;padding:2px 8px 18px;border-bottom:1px solid var(--line)}
.side-nav{display:flex;flex-direction:column;gap:4px}
.side-group{
  font-size:12px;color:var(--text-3);
  margin:18px 0 6px;padding-left:12px;letter-spacing:.04em;
}
.side-nav a{
  position:relative;display:flex;align-items:center;
  height:44px;padding:0 12px;border-radius:10px;
  font-size:14.5px;color:var(--text-2);
  transition:background .18s ease,color .18s ease;
}
.side-nav a::before{
  content:"";position:absolute;left:0;top:50%;width:3px;height:0;
  border-radius:2px;background:var(--brand);transform:translateY(-50%);
  transition:height .2s ease;
}
.side-nav a:hover{background:var(--brand-soft);color:var(--brand-dark)}
.side-nav a.is-active{background:var(--brand-soft);color:var(--brand-dark);font-weight:600}
.side-nav a.is-active::before{height:20px}
.side-nav a:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.side-card{
  margin-top:auto;background:var(--brand-soft);
  border-radius:var(--r-card);padding:16px;
}
.side-card-label{font-size:12px;font-weight:600;color:var(--brand-dark);margin:0 0 6px}
.side-card-title{font-size:15px;font-weight:700;color:var(--text);margin:0 0 6px}
.side-card-desc{font-size:12.5px;line-height:1.7;color:var(--text-2);margin:0 0 14px}
.scrim{display:none}

/* 面包屑 */
.crumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:13px;color:var(--text-3);
  padding:36px 0 0;
}
.crumb a{color:var(--text-2)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:#C3CEDB}
.crumb-cat{color:var(--text-2)}
.crumb-cur{
  max-width:280px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
  color:var(--text-3);
}

/* 文章头部 */
.article-head{padding:22px 0 0;max-width:900px}
.article-head h1{
  font-size:clamp(28px,3.4vw,40px);
  line-height:1.25;font-weight:700;
  margin:0 0 18px;
}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;
  padding-bottom:22px;border-bottom:1px solid var(--line);
  font-size:13.5px;color:var(--text-2);
}
.meta-item{display:inline-flex;align-items:center;gap:6px}
.meta-item svg{width:15px;height:15px;stroke:var(--text-3);stroke-width:1.6;fill:none}

/* 文章主体布局 */
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 200px;
  gap:44px;
  align-items:start;
  padding:36px 0 0;
}
.article-body{
  position:relative;
  max-width:760px;
  min-width:0;
  font-size:16px;
  line-height:1.9;
  color:var(--text);
  overflow-wrap:break-word;
  word-break:break-word;
}
.article-body > *:first-child{margin-top:0}
.article-body h2{
  position:relative;
  font-size:26px;line-height:1.35;font-weight:700;
  margin:46px 0 18px;padding-left:16px;
  scroll-margin-top:80px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;
  width:4px;border-radius:2px;background:var(--brand);
}
.article-body h3{
  font-size:19px;line-height:1.5;font-weight:600;
  margin:30px 0 12px;scroll-margin-top:80px;
}
.article-body h4{font-size:16.5px;font-weight:600;margin:24px 0 10px;color:var(--text)}
.article-body p{margin:0 0 1.1em}
.article-body ul,.article-body ol{margin:0 0 1.1em;padding-left:22px}
.article-body li{margin-bottom:.5em}
.article-body ul li::marker{color:var(--brand)}
.article-body ol li::marker{color:var(--brand);font-weight:600}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;
  background:#F2F7FD;border-left:3px solid var(--brand);
  border-radius:0 10px 10px 0;color:var(--text-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{
  max-width:100%;height:auto;border-radius:12px;
  margin:24px auto;
}
.article-body figure{margin:24px 0}
.article-body figcaption{
  text-align:center;font-size:13px;color:var(--text-3);
  margin-top:10px;line-height:1.7;
}
.article-body a{
  color:var(--brand);
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-thickness:1px;
}
.article-body a:hover{color:var(--brand-dark)}
.article-body table{
  width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;
}
.article-body th,.article-body td{
  border:1px solid var(--line);padding:11px 14px;text-align:left;
}
.article-body thead th{background:var(--sub);font-weight:600}
.article-body tbody tr:nth-child(even){background:#FAFCFE}
.article-body tbody td:first-child{font-weight:600}
.article-body code{
  background:var(--sub);padding:2px 6px;border-radius:var(--r-sm);
  font-size:14px;
}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0}
.article-body .tip{
  display:flex;gap:10px;align-items:flex-start;
  background:var(--sub);border-radius:12px;padding:14px 16px;
  font-size:14.5px;line-height:1.8;color:var(--text-2);margin:22px 0;
}
.article-body .tip svg{width:18px;height:18px;flex:0 0 auto;margin-top:4px;stroke:var(--brand);stroke-width:1.6;fill:none}

/* 目录 */
.toc{padding-top:4px}
.toc-head{
  display:flex;width:100%;align-items:center;justify-content:space-between;gap:8px;
  padding:0 0 12px;background:none;border:0;cursor:pointer;
  font-size:13px;font-weight:700;color:var(--text);letter-spacing:.02em;
  border-bottom:1px solid var(--line);
}
.toc-head:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px}
.toc-chev{width:14px;height:14px;stroke:var(--text-3);stroke-width:1.8;fill:none;transition:transform .22s ease}
.toc.is-open .toc-chev{transform:rotate(180deg)}
.toc-list{
  list-style:none;margin:0;padding:12px 0 0;
  max-height:60vh;overflow:auto;
}
.toc-list li{margin:0}
.toc-list a{
  display:block;padding:7px 0 7px 12px;
  border-left:2px solid transparent;
  font-size:13.5px;line-height:1.55;color:var(--text-2);
  transition:color .16s ease,border-color .16s ease,background .16s ease;
}
.toc-list a:hover{color:var(--brand)}
.toc-list a.active{color:var(--brand);border-left-color:var(--brand);font-weight:600}
.toc-list li.lv3 a{padding-left:24px;font-size:13px;color:var(--text-3)}
.toc-list li.lv3 a.active{color:var(--brand)}
.toc-empty{font-size:13px;line-height:1.7;color:var(--text-3);margin:12px 0 0;display:none}
.toc.is-empty .toc-list{display:none}
.toc.is-empty .toc-empty{display:block}
.toc.is-empty .toc-head{cursor:default}

/* 空态 */
.empty-state{
  border:1px dashed #C6D3E2;border-radius:var(--r-panel);
  background:#fff;padding:44px 28px;text-align:center;
}
.empty-state .empty-icon{
  width:44px;height:44px;margin:0 auto 14px;
  stroke:var(--brand);stroke-width:1.6;fill:none;
}
.empty-state .empty-title{font-size:17px;font-weight:700;margin:0 0 8px}
.empty-state .empty-desc{
  font-size:14px;line-height:1.8;color:var(--text-2);
  max-width:420px;margin:0 auto 20px;
}

/* 文末 */
.article-foot{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:12px;margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
  max-width:760px;
}
.link-back{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--brand);
  text-decoration:underline;text-underline-offset:3px;
}
.link-back:hover{color:var(--brand-dark)}
.article-foot-note{font-size:12.5px;color:var(--text-3)}

/* 相关推荐 */
.related{margin-top:64px;padding-top:44px;border-top:1px solid var(--line)}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:16px;margin-bottom:22px;
}
.section-head h2{
  position:relative;font-size:22px;font-weight:700;
  padding-left:14px;margin:0;
}
.section-head h2::before{
  content:"";position:absolute;left:0;top:5px;bottom:5px;
  width:4px;border-radius:2px;background:var(--brand);
}
.link-more{font-size:14px;font-weight:600;text-decoration:underline;text-underline-offset:3px}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.rcard{
  display:flex;flex-direction:column;
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.rcard:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#CBDCEE}
.rcard .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--sub)}
.rcard .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.rcard:hover .thumb img{transform:scale(1.04)}
.rcard .rc-body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:9px;flex:1}
.rcard .rc-title{
  font-size:16px;font-weight:600;line-height:1.5;color:var(--text);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.rcard:hover .rc-title{color:var(--brand-dark)}
.rcard .rc-desc{
  font-size:13.5px;line-height:1.75;color:var(--text-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.rcard .rc-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  gap:10px;font-size:12.5px;color:var(--text-3);
}
.rcard:focus-visible{outline:2px solid var(--brand);outline-offset:2px}

/* CTA 条 */
.cta-strip{
  margin-top:68px;
  background:var(--brand-soft);
  border-radius:var(--r-panel);
  padding:32px 36px;
  display:flex;align-items:center;justify-content:space-between;
  gap:24px;flex-wrap:wrap;
}
.cta-strip h2{font-size:22px;font-weight:700;margin:0 0 8px}
.cta-strip p{font-size:14.5px;line-height:1.8;color:var(--text-2);margin:0;max-width:620px}

/* 页脚 */
.site-footer{
  background:#F0F3F8;border-top:1px solid var(--line);
  margin-top:88px;
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.1fr;
  gap:40px;padding:56px 0 40px;
}
.site-footer h4{font-size:15px;font-weight:700;margin:0 0 16px;color:var(--text)}
.footer-about .brand{padding:0;border:0}
.footer-about p{
  font-size:14px;line-height:1.85;color:var(--text-2);
  margin:16px 0 0;max-width:380px;
}
.footer-links{list-style:none;padding:0;margin:0}
.footer-links li{margin-bottom:11px;font-size:14px;color:var(--text-2)}
.footer-links a{color:var(--text-2);font-size:14px}
.footer-links a:hover{color:var(--brand)}
.footer-links a:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.footer-contact li{line-height:1.7}
.qr{
  width:76px;height:76px;margin-top:14px;
  border:1px solid var(--line);border-radius:10px;background:#fff;
  display:flex;align-items:center;justify-content:center;
}
.qr svg{width:42px;height:42px;stroke:var(--brand);stroke-width:1.6;fill:none}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--line);
  padding:18px 0 28px;font-size:13px;color:var(--text-3);
}
.footer-bottom p{margin:0}

/* 响应式 */
@media (min-width:1440px){
  .container{max-width:1240px}
}
@media (max-width:1199px){
  :root{--side-w:208px}
  .sidebar{padding:20px 12px}
  .article-layout{grid-template-columns:minmax(0,1fr) 180px;gap:32px}
}
@media (max-width:1279px){
  .toc{
    border:1px solid var(--line);border-radius:var(--r-card);
    background:#fff;padding:16px 18px;margin-top:36px;
    box-shadow:var(--sh-1);
  }
  .toc-head{border-bottom:0;padding:0}
  .toc-list{display:none;max-height:none;padding-top:12px;border-top:1px solid var(--line);margin-top:12px}
  .toc.is-open .toc-list{display:block}
  .toc.is-empty .toc-head{cursor:pointer}
}
@media (max-width:1023px){
  .topbar{display:flex}
  .shell{display:block}
  .sidebar{
    position:fixed;top:0;left:0;bottom:0;z-index:80;
    width:280px;height:100%;
    transform:translateX(-100%);
    transition:transform .28s ease;
    box-shadow:var(--sh-3);
    border-right:0;
  }
  .sidebar.open{transform:translateX(0)}
  .scrim{
    display:block;position:fixed;inset:0;z-index:70;
    background:rgba(22,33,46,.45);
    opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
  }
  .scrim.show{opacity:1;visibility:visible}
  .main{padding-top:56px}
  .container{padding:0 20px}
  .crumb{padding-top:26px}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0}
  .article-body{max-width:100%}
  .article-body h2{font-size:22px;margin:38px 0 16px}
  .article-body h3{font-size:18px}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-strip{padding:26px 24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:44px 0 32px}
  .site-footer{margin-top:64px}
}
@media (max-width:767px){
  body{font-size:15.5px}
  .container{padding:0 16px}
  .article-head h1{font-size:clamp(24px,6.4vw,30px)}
  .crumb-cur{max-width:160px}
  .article-body{font-size:15.5px;line-height:1.85}
  .article-body h2{font-size:20px;padding-left:13px}
  .article-body h2::before{width:3px;top:4px;bottom:4px}
  .related-grid{grid-template-columns:1fr}
  .cta-strip{flex-direction:column;align-items:stretch;text-align:left;padding:24px 20px}
  .cta-strip .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .section-head{flex-direction:column;align-items:flex-start;gap:8px}
  .article-foot{flex-direction:column;align-items:flex-start}
  .site-footer{margin-top:56px}
}
@media (max-width:479px){
  .brand-text span{display:none}
  .article-body table{font-size:14px}
  .article-body th,.article-body td{padding:9px 10px}
}

/* roulang page: category2 */
:root{
  --brand:#2A6BB8;
  --brand-dark:#1E4E8C;
  --brand-light:#E7EFFA;
  --accent:#E07A2F;
  --accent-light:#FDEFE1;
  --bg:#F5F7FA;
  --card:#FFFFFF;
  --sub:#EDF2F8;
  --line:#DFE6EF;
  --text:#16212E;
  --text-2:#55677A;
  --text-3:#8A9AAC;
  --ok:#2F9E7B;
  --err:#D9503F;
  --dark:#132234;
  --r-sm:6px;
  --r-md:14px;
  --r-lg:18px;
  --r-pill:999px;
  --sh1:0 1px 2px rgba(22,33,46,.05),0 6px 18px rgba(22,33,46,.06);
  --sh2:0 10px 28px rgba(22,33,46,.10);
  --sh3:0 18px 44px rgba(22,33,46,.14);
  --nav-w:248px;
  --pad:88px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
}
img{display:block;max-width:100%;height:auto}
a{color:var(--brand);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-dark)}
button{font:inherit;color:inherit;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.num,.metric-num,.dark-num,.cd-num,.nav-time{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

/* ---------- 布局骨架 ---------- */
.layout{display:grid;grid-template-columns:var(--nav-w) minmax(0,1fr)}
.content{min-width:0;padding:0 40px}
.container{max-width:1180px;margin:0 auto;width:100%}
@media (min-width:1440px){
  .container{max-width:1240px}
}
@media (max-width:1199px){
  .layout{grid-template-columns:208px minmax(0,1fr)}
}
@media (max-width:1023px){
  .layout{grid-template-columns:minmax(0,1fr)}
  .content{padding:0 20px}
}

/* ---------- 左侧导航 ---------- */
.side-nav{
  position:sticky;
  top:0;
  align-self:start;
  height:100vh;
  width:100%;
  display:flex;
  flex-direction:column;
  gap:20px;
  padding:22px 18px;
  background:#fff;
  border-right:1px solid var(--line);
  box-shadow:inset -1px 0 0 rgba(22,33,46,.02);
  overflow-y:auto;
  z-index:60;
}
.brand{display:flex;align-items:center;gap:12px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.brand-mark{
  position:relative;
  flex:0 0 auto;
  width:38px;height:38px;
  border-radius:11px;
  background:linear-gradient(180deg,var(--brand) 0%,var(--brand-dark) 100%);
  box-shadow:var(--sh1);
}
.brand-mark::before{
  content:"";
  position:absolute;
  left:50%;top:50%;
  transform:translate(-50%,-50%);
  width:14px;height:21px;
  border:1.6px solid rgba(255,255,255,.92);
  border-radius:4px;
}
.brand-mark::after{
  content:"";
  position:absolute;
  right:7px;top:7px;
  width:7px;height:7px;
  border-radius:50%;
  background:var(--accent);
}
.brand-text{display:flex;flex-direction:column;line-height:1.3}
.brand-text strong{font-size:16px;font-weight:700;letter-spacing:-.01em}
.brand-text span{font-size:12px;color:var(--text-3)}
.nav-caption{font-size:12px;color:var(--text-3);letter-spacing:.06em;margin:0 0 8px;padding-left:10px}
.nav-list{display:flex;flex-direction:column;gap:2px}
.nav-list a{
  position:relative;
  display:flex;align-items:center;gap:10px;
  min-height:44px;
  padding:0 12px;
  border-radius:var(--r-sm);
  color:var(--text-2);
  font-size:14.5px;
  transition:background .18s ease,color .18s ease;
}
.nav-list a svg{width:17px;height:17px;flex:0 0 auto;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;opacity:.85}
.nav-list a:hover{background:var(--brand-light);color:var(--brand-dark)}
.nav-list a.active{background:var(--brand-light);color:var(--brand-dark);font-weight:600}
.nav-list a.active::before{
  content:"";
  position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:20px;border-radius:2px;background:var(--brand);
}
.nav-card{
  margin-top:auto;
  padding:16px;
  border-radius:var(--r-md);
  background:var(--sub);
  border:1px solid var(--line);
}
.nav-card p.nav-card-title{font-size:12.5px;color:var(--text-2);margin-bottom:8px}
.nav-time{display:flex;align-items:baseline;gap:4px;font-size:20px;font-weight:700;color:var(--brand-dark);letter-spacing:-.01em;margin-bottom:12px}
.nav-time i{font-style:normal;font-size:13px;font-weight:500;color:var(--text-3);margin-left:2px}
.nav-time span{min-width:26px;text-align:center}

/* ---------- 移动顶栏与抽屉 ---------- */
.topbar{
  position:sticky;
  top:0;
  z-index:55;
  display:none;
  align-items:center;
  gap:12px;
  height:56px;
  padding:0 20px;
  background:rgba(255,255,255,.96);
  backdrop-filter:saturate(1.4) blur(6px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.topbar.scrolled{box-shadow:var(--sh1)}
.topbar .brand{padding:0;border:0;flex:1;min-width:0}
.topbar .brand-text span{display:none}
.burger{
  width:38px;height:38px;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  background:#fff;
}
.burger span{position:relative;display:block;width:16px;height:1.6px;background:var(--text);border-radius:2px}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:16px;height:1.6px;background:var(--text);border-radius:2px}
.burger span::before{top:-5px}
.burger span::after{top:5px}
.scrim{
  position:fixed;inset:0;z-index:59;
  background:rgba(22,33,46,.45);
  opacity:0;visibility:hidden;
  transition:opacity .25s ease,visibility .25s ease;
}
.scrim.show{opacity:1;visibility:visible}
@media (max-width:1023px){
  .topbar{display:flex}
  .side-nav{
    position:fixed;left:0;top:0;
    width:280px;height:100vh;
    transform:translateX(-102%);
    transition:transform .28s ease;
    box-shadow:var(--sh3);
    border-right:1px solid var(--line);
  }
  .side-nav.open{transform:translateX(0)}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;
  border-radius:var(--r-sm);
  border:1px solid transparent;
  font-size:15px;font-weight:600;
  line-height:1;
  transition:background .18s ease,color .18s ease,box-shadow .18s ease,transform .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn-sm{height:36px;padding:0 16px;font-size:13.5px}
.btn-block{width:100%}
.btn-primary{background:var(--accent);color:#fff;box-shadow:var(--sh1)}
.btn-primary:hover{background:#d06f26;color:#fff;transform:translateY(-1px);box-shadow:var(--sh2)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;color:var(--brand);border-color:#c6d9ef}
.btn-ghost:hover{background:var(--brand-light);color:var(--brand-dark);transform:translateY(-1px)}
.btn:disabled,.btn.disabled{opacity:.45;pointer-events:none;transform:none}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;text-decoration:underline;text-decoration-offset:3px;text-underline-offset:3px}
.link-more svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:transform .18s ease}
.link-more:hover svg{transform:translateX(3px)}

/* ---------- 标签 / 徽章 ---------- */
.tag{
  display:inline-flex;align-items:center;
  height:24px;padding:0 11px;
  border-radius:var(--r-pill);
  background:var(--brand-light);
  color:var(--brand-dark);
  font-size:12.5px;font-weight:600;
}
.tag-accent{background:var(--accent-light);color:#b45c19}
.badge-float{
  position:absolute;left:16px;bottom:16px;
  display:inline-flex;align-items:center;gap:6px;
  height:28px;padding:0 12px;
  border-radius:var(--r-pill);
  background:rgba(255,255,255,.94);
  color:var(--brand-dark);
  font-size:12.5px;font-weight:600;
  box-shadow:var(--sh1);
}
.badge-float::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent)}

/* ---------- 倒计时条 ---------- */
.countdown-bar{
  display:flex;align-items:center;gap:16px;flex-wrap:wrap;
  margin:20px 0 0;
  padding:12px 18px;
  background:var(--brand-light);
  border:1px solid #d3e2f4;
  border-radius:var(--r-md);
}
.cd-badge{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;
  border-radius:var(--r-pill);
  background:var(--accent);
  color:#fff;
  font-size:12.5px;font-weight:600;
}
.cd-label{font-size:13.5px;color:var(--brand-dark)}
.cd-blocks{display:flex;align-items:center;gap:8px;margin-left:auto}
.cd-block{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  min-width:48px;height:44px;
  background:#fff;
  border-radius:var(--r-sm);
  box-shadow:var(--sh1);
}
.cd-num{font-size:18px;font-weight:700;line-height:1.1;color:var(--brand-dark)}
.cd-unit{font-size:10.5px;color:var(--text-3);line-height:1.2}
.cd-cta{height:38px;padding:0 18px;font-size:14px}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  padding:26px 0 0;
  font-size:13px;color:var(--text-3);
}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:#c3cedb}
.breadcrumb .current{color:var(--text);font-weight:600}

/* ---------- Hero ---------- */
.hero{padding:calc(var(--pad) - 40px) 0 var(--pad)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:48px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:600;color:var(--brand);
  letter-spacing:.04em;margin-bottom:14px;
}
.eyebrow::before{content:"";width:18px;height:3px;border-radius:2px;background:var(--accent)}
.hero h1{font-size:clamp(30px,3.6vw,44px);line-height:1.2;font-weight:700;letter-spacing:-.01em}
.hero-sub{margin-top:14px;font-size:19px;font-weight:600;color:var(--brand-dark);line-height:1.5}
.hero-desc{margin-top:14px;font-size:16px;color:var(--text-2);max-width:560px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.hero-steps{
  display:flex;flex-wrap:wrap;
  margin-top:30px;
  border-top:1px solid var(--line);
}
.hero-steps li{flex:1 1 0;min-width:132px;padding:16px 18px 0;border-left:1px solid var(--line)}
.hero-steps li:first-child{border-left:0;padding-left:0}
.hero-steps .num{display:block;font-size:13px;font-weight:700;color:var(--accent);letter-spacing:.02em}
.hero-steps span:last-child{display:block;font-size:14.5px;color:var(--text-2);margin-top:4px}
.hero-media{position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh1)}
.hero-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
@media (max-width:1023px){
  .hero{padding:48px 0 56px}
  .hero-grid{grid-template-columns:minmax(0,1fr);gap:30px}
}
@media (max-width:767px){
  .hero-steps li{flex:1 1 45%;padding-top:14px}
  .hero-steps li:nth-child(3){border-left:0;padding-left:0}
}

/* ---------- 主栅格与锚点侧栏 ---------- */
.section{padding:var(--pad) 0}
.section-tight{padding:0 0 var(--pad)}
.section-head{max-width:720px;margin-bottom:34px}
.section-head h2{
  position:relative;
  font-size:26px;font-weight:700;line-height:1.35;
  padding-left:14px;
}
.section-head h2::before{
  content:"";position:absolute;left:0;top:.22em;
  width:4px;height:22px;border-radius:2px;background:var(--brand);
}
.section-head p{margin-top:12px;font-size:15.5px;color:var(--text-2)}
.main-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:32px;align-items:start}
@media (min-width:1200px){
  .main-grid{grid-template-columns:minmax(0,1fr) 232px;gap:34px}
}
.anchor-rail{
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:#fff;
  padding:18px;
  box-shadow:var(--sh1);
}
@media (min-width:1200px){
  .anchor-rail{position:sticky;top:24px}
}
.anchor-rail h3{font-size:13px;color:var(--text-3);font-weight:600;letter-spacing:.05em;margin-bottom:12px}
.anchor-rail ul{display:flex;flex-direction:column;gap:2px}
.anchor-rail a{
  position:relative;
  display:block;
  padding:8px 10px 8px 14px;
  font-size:14px;
  color:var(--text-2);
  border-radius:var(--r-sm);
  transition:background .18s ease,color .18s ease;
}
.anchor-rail a::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:0;border-radius:2px;background:var(--brand);
  transition:height .2s ease;
}
.anchor-rail a:hover{background:var(--sub);color:var(--brand-dark)}
.anchor-rail a.on{background:var(--brand-light);color:var(--brand-dark);font-weight:600}
.anchor-rail a.on::before{height:18px}
@media (max-width:1199px){
  .anchor-rail{padding:12px}
  .anchor-rail h3{margin-bottom:8px;padding-left:2px}
  .anchor-rail ul{flex-direction:row;gap:8px;overflow-x:auto;padding-bottom:4px;-webkit-overflow-scrolling:touch}
  .anchor-rail li{flex:0 0 auto}
  .anchor-rail a{
    padding:7px 14px;
    border:1px solid var(--line);
    border-radius:var(--r-pill);
    white-space:nowrap;
    background:#fff;
  }
  .anchor-rail a::before{display:none}
}

/* ---------- 流程卡片 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
@media (max-width:767px){
  .card-grid{grid-template-columns:minmax(0,1fr);gap:18px}
}
.flow-card{
  display:flex;flex-direction:column;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--sh1);
  overflow:hidden;
  transition:transform .2s ease,box-shadow .2s ease;
}
.flow-card:hover{transform:translateY(-2px);box-shadow:var(--sh2)}
.flow-card.scroll-target{scroll-margin-top:88px}
.card-media{display:block;overflow:hidden;background:var(--sub)}
.card-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .35s ease}
.flow-card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:20px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:19px;font-weight:600;line-height:1.5}
.card-body h3 a{color:var(--text)}
.card-body h3 a:hover{color:var(--brand)}
.card-body p{font-size:14.5px;color:var(--text-2);line-height:1.75}
.card-body .link-more{margin-top:auto}
.card-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap}

/* ---------- 指标数据条 ---------- */
.metrics{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  overflow:hidden;
}
.metric{background:#fff;padding:26px 22px}
.metric-num{font-size:26px;font-weight:700;color:var(--brand-dark);line-height:1.2;letter-spacing:-.01em}
.metric-num em{font-style:normal;font-size:15px;font-weight:600;color:var(--text-3);margin-left:4px}
.metric-label{margin-top:8px;font-size:13.5px;color:var(--text-2)}
@media (max-width:767px){
  .metrics{grid-template-columns:repeat(2,minmax(0,1fr))}
  .metric{padding:20px 16px}
}

/* ---------- 深色区块 ---------- */
.dark-band{
  background:var(--dark);
  border-radius:var(--r-lg);
  padding:52px 44px;
  color:#fff;
  position:relative;
  overflow:hidden;
}
.dark-band::after{
  content:"";position:absolute;right:-60px;top:-60px;
  width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle at center,rgba(42,107,184,.55),rgba(42,107,184,0) 68%);
}
.dark-band h2{font-size:26px;font-weight:700;line-height:1.35;position:relative;z-index:1}
.dark-band > p{margin-top:12px;font-size:15.5px;color:#b9c7d8;max-width:640px;position:relative;z-index:1}
.dark-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:34px;position:relative;z-index:1}
.dark-stat{border-top:1px solid rgba(255,255,255,.16);padding-top:18px}
.dark-num{font-size:32px;font-weight:700;color:#7FB2E8;line-height:1.15}
.dark-stat p{margin-top:8px;font-size:14px;color:#9FB0C4;line-height:1.7}
@media (max-width:1023px){
  .dark-band{padding:38px 26px}
  .dark-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
}
@media (max-width:479px){
  .dark-stats{grid-template-columns:minmax(0,1fr)}
}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:860px}
.faq-item{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--sh1);
  overflow:hidden;
  transition:box-shadow .2s ease;
}
.faq-item.open{box-shadow:var(--sh2)}
.faq-q{
  position:relative;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  width:100%;
  padding:18px 22px 18px 24px;
  background:transparent;
  border:0;
  text-align:left;
  font-size:16px;font-weight:600;color:var(--text);
}
.faq-q::before{
  content:"";position:absolute;left:0;top:0;bottom:0;
  width:3px;background:var(--accent);
  transform:scaleY(0);transform-origin:top;
  transition:transform .22s ease;
}
.faq-item.open .faq-q::before{transform:scaleY(1)}
.faq-q svg{width:18px;height:18px;flex:0 0 auto;stroke:var(--text-3);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:transform .25s ease}
.faq-item.open .faq-q svg{transform:rotate(180deg);stroke:var(--brand)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a p{padding:0 22px 20px 24px;font-size:14.5px;color:var(--text-2);line-height:1.85}

/* ---------- CTA 面板 ---------- */
.cta-panel{
  background:var(--brand-light);
  border:1px solid #d3e2f4;
  border-radius:var(--r-lg);
  padding:44px;
  display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);
  gap:40px;
  align-items:start;
}
.cta-panel h2{font-size:26px;font-weight:700;line-height:1.35}
.cta-panel > div > p{margin-top:14px;font-size:15.5px;color:var(--text-2)}
.cta-points{margin-top:24px;display:flex;flex-direction:column;gap:12px}
.cta-points li{display:flex;align-items:flex-start;gap:10px;font-size:14.5px;color:var(--text-2)}
.cta-points svg{width:18px;height:18px;flex:0 0 auto;margin-top:4px;stroke:var(--ok);fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.form-card{
  background:#fff;
  border-radius:var(--r-md);
  padding:26px;
  box-shadow:var(--sh1);
}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;font-weight:600;color:var(--text-2);margin-bottom:8px}
.field input[type="text"],
.field input[type="tel"],
.field select{
  width:100%;
  height:46px;
  padding:0 14px;
  font-size:15px;
  color:var(--text);
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.field input::placeholder{color:#a7b3c0}
.field input:focus,.field select:focus{
  outline:none;
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(42,107,184,.14);
}
.field .hint{display:block;margin-top:6px;font-size:12px;color:var(--err);min-height:16px}
.field.error input,.field.error select{border-color:var(--err);box-shadow:0 0 0 3px rgba(217,80,63,.12)}
.check{display:flex;align-items:flex-start;gap:10px;font-size:13.5px;color:var(--text-2);line-height:1.7}
.check input{width:16px;height:16px;margin-top:5px;accent-color:var(--brand)}
.check a{text-decoration:underline;text-underline-offset:3px}
.spinner{
  width:15px;height:15px;border-radius:50%;
  border:2px solid rgba(255,255,255,.45);
  border-top-color:#fff;
  animation:spin .7s linear infinite;
  display:none;
}
.btn.loading .spinner{display:block}
.btn.loading .btn-text{opacity:.85}
@keyframes spin{to{transform:rotate(360deg)}}
.form-note{margin-top:12px;font-size:12.5px;color:var(--text-3);text-align:center}
.form-result{
  display:none;
  margin-top:14px;
  padding:12px 14px;
  border-left:3px solid var(--ok);
  background:#F1F8F5;
  border-radius:var(--r-sm);
  font-size:14px;
  color:#1f6b53;
}
.form-result.show{display:block}
@media (max-width:1023px){
  .cta-panel{grid-template-columns:minmax(0,1fr);padding:30px 24px;gap:26px}
}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:var(--pad);
  background:#F0F3F8;
  border-top:1px solid var(--line);
  padding:56px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:36px;
  padding-bottom:40px;
}
.footer-about p{margin-top:16px;font-size:14px;color:var(--text-2);line-height:1.85;max-width:340px}
.site-footer h4{font-size:14.5px;font-weight:600;margin-bottom:16px;color:var(--text)}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{font-size:14px;color:var(--text-2)}
.footer-links a:hover{color:var(--brand)}
.footer-contact li{font-size:14px;color:var(--text-2)}
.qr{
  width:74px;height:74px;
  margin-top:16px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  display:flex;align-items:center;justify-content:center;
}
.qr svg{width:40px;height:40px;stroke:var(--brand);fill:none;stroke-width:1.4}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--line);
  padding:20px 0 24px;
}
.footer-bottom p{font-size:13px;color:var(--text-3)}
@media (max-width:1023px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
}
@media (max-width:599px){
  .footer-grid{grid-template-columns:minmax(0,1fr)}
}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:50;
  width:44px;height:44px;
  display:flex;align-items:center;justify-content:center;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  box-shadow:var(--sh1);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .22s ease,visibility .22s ease,transform .22s ease,box-shadow .22s ease;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{box-shadow:var(--sh2)}
.to-top svg{width:18px;height:18px;stroke:var(--brand);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* ---------- 断点微调 ---------- */
@media (max-width:767px){
  :root{--pad:56px}
  body{font-size:15px}
  .section-head h2{font-size:22px}
  .cd-blocks{width:100%;margin-left:0;justify-content:space-between}
  .cd-block{min-width:42px;height:40px}
  .cd-cta{width:100%}
  .hero-actions .btn{flex:1 1 auto;justify-content:center}
}
@media (max-width:479px){
  .cd-num{font-size:16px}
  .metric-num{font-size:22px}
  .dark-num{font-size:26px}
  .to-top{right:14px;bottom:14px}
}

/* roulang page: category3 */
:root{
  --c-primary:#2A6BB8;
  --c-primary-dark:#1E4E8C;
  --c-primary-soft:#E7EFFA;
  --c-accent:#E07A2F;
  --c-accent-soft:#FDEFE1;
  --bg:#F5F7FA;
  --bg-2:#EDF2F8;
  --card:#FFFFFF;
  --line:#DFE6EF;
  --t1:#16212E;
  --t2:#55677A;
  --t3:#8A9AAC;
  --ok:#2F9E7B;
  --err:#D9503F;
  --r-sm:6px;
  --r-card:14px;
  --r-panel:18px;
  --r-pill:999px;
  --sh1:0 1px 2px rgba(22,33,46,.05),0 6px 18px rgba(22,33,46,.06);
  --sh2:0 10px 28px rgba(22,33,46,.10);
  --sh3:0 18px 44px rgba(22,33,46,.14);
  --sidenav-w:248px;
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"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:1.85;
  color:var(--t1);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
h1,h2,h3,h4,p,figure,ol,ul{margin:0}
ol,ul{list-style:none;padding:0}
img{max-width:100%;display:block;border:0}
a{color:var(--c-primary);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--c-primary-dark)}
button{font-family:inherit;font-size:inherit;cursor:pointer}
input{font-family:inherit}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px}

/* ---------- 布局 ---------- */
.layout{margin-left:var(--sidenav-w)}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 40px}
.section{padding:88px 0}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}

/* ---------- 品牌标记 ---------- */
.brand{display:flex;align-items:center;gap:11px;min-width:0}
.brand-mark{
  position:relative;flex:0 0 auto;width:36px;height:36px;border-radius:9px;
  background:var(--c-primary);
}
.brand-mark::before{
  content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:14px;height:21px;border:1.6px solid #fff;border-radius:3px;
}
.brand-mark::after{
  content:"";position:absolute;right:-3px;bottom:-3px;width:11px;height:11px;border-radius:50%;
  background:var(--c-accent);border:2px solid #fff;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.brand-text strong{font-size:16px;font-weight:700;letter-spacing:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand-text span{font-size:12px;color:var(--t3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* ---------- 桌面左侧导航 ---------- */
.sidenav{
  position:fixed;left:0;top:0;bottom:0;width:var(--sidenav-w);
  background:#fff;border-right:1px solid var(--line);
  box-shadow:inset -1px 0 0 rgba(22,33,46,.02);
  display:flex;flex-direction:column;overflow-y:auto;z-index:60;
  transition:transform .28s ease;
}
.sidenav-head{padding:22px 20px 18px;border-bottom:1px solid var(--line)}
.nav-group{padding:18px 12px 4px}
.nav-label{font-size:12px;color:var(--t3);letter-spacing:.02em;padding:0 8px 8px}
.nav-group ul{display:flex;flex-direction:column;gap:2px}
.nav-link{
  position:relative;display:flex;align-items:center;height:44px;padding:0 10px 0 14px;
  border-radius:8px;color:var(--t2);font-size:14.5px;line-height:1.4;
  transition:background .18s ease,color .18s ease;
}
.nav-link::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:0;border-radius:2px;background:var(--c-primary);
  transition:height .2s ease;
}
.nav-link:hover{background:var(--c-primary-soft);color:var(--c-primary-dark)}
.nav-link.is-active{background:var(--c-primary-soft);color:var(--c-primary-dark);font-weight:600}
.nav-link.is-active::before{height:20px}
.sidenav-foot{
  margin-top:auto;padding:16px 16px 20px;border-top:1px solid var(--line);
  background:#fff;
}
.cd-label{font-size:12px;color:var(--t3)}
.cd-value{
  font-size:19px;font-weight:700;color:var(--c-primary-dark);
  font-variant-numeric:tabular-nums;letter-spacing:-.01em;margin:2px 0 10px;
}

/* ---------- 移动端顶栏 ---------- */
.topbar{display:none}
.burger{
  width:40px;height:40px;border:1px solid var(--line);border-radius:10px;background:#fff;
  display:inline-flex;align-items:center;justify-content:center;position:relative;flex:0 0 auto;
}
.burger span{position:relative;display:block;width:16px;height:2px;border-radius:2px;background:var(--t1)}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:16px;height:2px;border-radius:2px;background:var(--t1);
}
.burger span::before{top:-5px}
.burger span::after{top:5px}
.drawer-mask{
  position:fixed;inset:0;background:rgba(22,33,46,.45);z-index:55;
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
}
.drawer-mask.is-on{opacity:1;visibility:visible}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:8px;border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .18s ease;
}
.btn-sm{height:38px;padding:0 16px;font-size:13.5px}
.btn-block{width:100%}
.btn-primary{background:var(--c-accent);color:#fff;box-shadow:var(--sh1)}
.btn-primary:hover{background:#CF6B22;color:#fff;transform:translateY(-1px);box-shadow:var(--sh2)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:var(--c-primary)}
.btn-ghost:hover{background:var(--c-primary-soft);color:var(--c-primary-dark);transform:translateY(-1px)}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-weight:600;text-decoration:underline;text-underline-offset:3px}
.btn[disabled],.btn.is-loading{opacity:.65;pointer-events:none}
.spinner{
  width:15px;height:15px;border-radius:50%;border:2px solid rgba(255,255,255,.45);
  border-top-color:#fff;display:none;animation:spin .8s linear infinite;
}
.btn.is-loading .spinner{display:inline-block}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- 徽章与标签 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:7px;height:28px;padding:0 12px;border-radius:var(--r-pill);
  background:#fff;color:var(--c-primary-dark);font-size:12.5px;font-weight:600;border:1px solid #CFDEF2;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-accent)}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.chip{
  display:inline-flex;align-items:center;height:26px;padding:0 11px;border-radius:var(--r-pill);
  background:var(--bg-2);color:var(--t2);font-size:12.5px;
}
.chip-accent{background:var(--c-accent-soft);color:#B65F1B}

/* ---------- Hero ---------- */
.hero{padding:32px 0 0}
.hero-panel{
  background:var(--c-primary-soft);border-radius:var(--r-panel);
  padding:48px;display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center;
}
.hero-copy h1{
  font-size:clamp(30px,3.6vw,44px);line-height:1.2;font-weight:700;letter-spacing:0;
  margin:16px 0 12px;
}
.hero-sub{font-size:17px;color:var(--t2);line-height:1.7}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-points{display:flex;margin-top:30px;padding-top:18px;border-top:1px solid #CFDEF2}
.hero-points li{
  flex:1;padding-left:16px;border-left:1px solid #CFDEF2;
  font-size:13px;color:var(--t2);line-height:1.5;
}
.hero-points li:first-child{padding-left:0;border-left:0}
.hero-points strong{
  display:block;font-size:15px;color:var(--c-primary-dark);
  font-variant-numeric:tabular-nums;letter-spacing:-.01em;font-weight:700;margin-bottom:2px;
}
.hero-media{position:relative;border-radius:16px;overflow:hidden;box-shadow:var(--sh1);aspect-ratio:16/10;background:#DCE6F4}
.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-badge{
  position:absolute;left:14px;bottom:14px;height:30px;padding:0 14px;display:inline-flex;align-items:center;
  border-radius:var(--r-pill);background:#fff;color:var(--c-primary-dark);font-size:13px;font-weight:600;
  box-shadow:var(--sh1);
}

/* ---------- 区块标题 ---------- */
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:34px;flex-wrap:wrap}
.sec-h{position:relative;padding-left:16px;font-size:26px;line-height:1.35;font-weight:700}
.sec-h::before{
  content:"";position:absolute;left:0;top:.24em;bottom:.24em;width:4px;border-radius:2px;background:var(--c-primary);
}
.sec-note{font-size:14px;color:var(--t3);max-width:520px;line-height:1.7}

/* ---------- 数据卡 ---------- */
.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.stat-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px 20px;box-shadow:var(--sh1);
  transition:box-shadow .2s ease,transform .2s ease;
}
.stat-card:hover{box-shadow:var(--sh2);transform:translateY(-2px)}
.stat-num{
  font-size:30px;font-weight:700;color:var(--c-primary-dark);line-height:1.1;
  font-variant-numeric:tabular-nums;letter-spacing:-.01em;
}
.stat-num span{font-size:14px;font-weight:600;color:var(--t3);margin-left:4px}
.stat-t{font-size:15px;font-weight:600;margin-top:6px}
.stat-d{font-size:13px;color:var(--t3);line-height:1.65;margin-top:4px}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;padding-left:0}
.timeline::before{
  content:"";position:absolute;left:19px;top:10px;bottom:14px;width:2px;background:var(--line);
}
.tl-item{position:relative;padding:0 0 34px 68px}
.tl-item:last-child{padding-bottom:0}
.tl-dot{
  position:absolute;left:0;top:0;width:40px;height:40px;border-radius:50%;
  border:2px solid var(--c-primary);background:#fff;color:var(--c-primary-dark);
  display:flex;align-items:center;justify-content:center;
  font-size:13.5px;font-weight:700;font-variant-numeric:tabular-nums;letter-spacing:0;
  transition:background .2s ease,color .2s ease,transform .2s ease;
}
.tl-item:hover .tl-dot{background:var(--c-primary);color:#fff;transform:translateY(-2px)}
.tl-body h3{font-size:19px;line-height:1.5;font-weight:600;margin-bottom:6px}
.tl-body p{color:var(--t2);font-size:15px;line-height:1.85;max-width:760px}

/* ---------- 深色区块 ---------- */
.dark-band{background:#14263D;color:#fff;padding:88px 0}
.dark-band .sec-h{color:#fff}
.dark-band .sec-h::before{background:var(--c-accent)}
.dark-head p{color:#9FB2C9;font-size:14px;margin-top:10px;max-width:560px}
.metric-list{margin-top:38px;display:flex;flex-direction:column;gap:2px}
.metric-row{
  display:grid;grid-template-columns:132px 1fr 220px;gap:26px;align-items:center;
  padding:22px 0;border-top:1px solid rgba(255,255,255,.12);
}
.metric-row:last-child{border-bottom:1px solid rgba(255,255,255,.12)}
.metric-num{
  font-size:26px;font-weight:700;color:var(--c-accent);
  font-variant-numeric:tabular-nums;letter-spacing:-.01em;
}
.metric-name{font-size:17px;font-weight:600}
.metric-desc{font-size:14px;color:#9FB2C9;line-height:1.7}
.metric-bar{height:6px;border-radius:3px;background:rgba(255,255,255,.14);overflow:hidden}
.metric-bar i{display:block;height:100%;border-radius:3px;background:var(--c-accent)}

/* ---------- 场景卡 ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.scene-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh1);display:flex;flex-direction:column;
  transition:box-shadow .2s ease,transform .2s ease;
}
.scene-card:hover{box-shadow:var(--sh2);transform:translateY(-2px)}
.scene-media{aspect-ratio:16/9;overflow:hidden;background:var(--bg-2)}
.scene-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.scene-card:hover .scene-media img{transform:scale(1.03)}
.scene-body{padding:20px 22px 24px}
.scene-body h3{font-size:18px;font-weight:600;line-height:1.5;margin-bottom:6px}
.scene-body p{font-size:14px;color:var(--t2);line-height:1.75}

/* ---------- FAQ ---------- */
.faq{display:flex;flex-direction:column;gap:12px;max-width:900px}
.faq-item{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{box-shadow:var(--sh1)}
.faq-item.open{border-color:#EBD3BC;box-shadow:var(--sh1)}
.faq-item.open::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--c-accent)}
.faq-q{
  width:100%;text-align:left;background:none;border:0;padding:19px 52px 19px 22px;
  font-size:16px;font-weight:600;color:var(--t1);line-height:1.6;position:relative;
}
.faq-arrow{
  position:absolute;right:20px;top:50%;transform:translateY(-50%);
  width:16px;height:16px;stroke:var(--t3);fill:none;stroke-width:1.6;
  stroke-linecap:round;stroke-linejoin:round;transition:transform .25s ease;
}
.faq-item.open .faq-arrow{transform:translateY(-50%) rotate(180deg);stroke:var(--c-accent)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a p{padding:0 52px 22px 22px;font-size:14.5px;color:var(--t2);line-height:1.85}

/* ---------- CTA 表单 ---------- */
.cta-band{background:var(--c-primary-soft);border-radius:var(--r-panel);padding:44px;display:grid;grid-template-columns:1fr .92fr;gap:44px;align-items:center}
.cta-copy h2{font-size:26px;line-height:1.35;font-weight:700;margin-bottom:12px}
.cta-copy p{color:var(--t2);font-size:15px;line-height:1.8;max-width:460px}
.cta-list{margin-top:20px;display:flex;flex-direction:column;gap:10px}
.cta-list li{display:flex;gap:10px;font-size:14px;color:var(--t2);align-items:flex-start}
.cta-list li::before{
  content:"";flex:0 0 auto;width:16px;height:16px;margin-top:6px;border-radius:50%;
  border:1.6px solid var(--c-primary);position:relative;
}
.cta-list li i{position:absolute}
.form-card{background:#fff;border-radius:var(--r-panel);padding:28px;box-shadow:var(--sh1)}
.form-card h3{font-size:18px;font-weight:600;margin-bottom:4px}
.form-card .form-tip{font-size:13px;color:var(--t3);margin-bottom:18px}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;font-weight:500;margin-bottom:6px;color:var(--t2)}
.field input[type="text"],.field input[type="tel"]{
  width:100%;height:44px;padding:0 14px;border:1px solid var(--line);border-radius:var(--r-sm);
  background:#fff;font-size:15px;color:var(--t1);transition:border-color .18s ease,box-shadow .18s ease;
}
.field input::placeholder{color:var(--t3)}
.field input:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(42,107,184,.14)}
.field.has-error input{border-color:var(--err);border-left-width:3px}
.field-err{display:none;font-size:12px;color:var(--err);margin-top:5px;line-height:1.5}
.field.has-error .field-err{display:block}
.check{display:flex;gap:9px;align-items:flex-start;font-size:13px;color:var(--t2);line-height:1.6;margin:4px 0 18px}
.check input{margin:4px 0 0;flex:0 0 auto;width:16px;height:16px;accent-color:var(--c-primary)}
.form-done{
  display:none;margin-top:14px;padding:12px 14px;border-left:3px solid var(--ok);
  background:#EAF6F2;border-radius:var(--r-sm);font-size:13.5px;color:#1F6E57;line-height:1.7;
}
.form-done.is-on{display:block}

/* ---------- 页脚 ---------- */
.site-footer{background:#EEF2F7;border-top:1px solid var(--line);padding:60px 0 0;margin-top:88px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:36px}
.footer-about p{font-size:13.5px;color:var(--t2);line-height:1.85;margin-top:16px;max-width:340px}
.site-footer h4{font-size:14px;font-weight:600;margin-bottom:14px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:13.5px;color:var(--t2)}
.footer-links a:hover{color:var(--c-primary-dark)}
.footer-contact li{font-size:13.5px;color:var(--t2)}
.qr{
  width:74px;height:74px;margin-top:14px;border-radius:10px;background:#fff;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
}
.qr svg{width:40px;height:40px;fill:none;stroke:var(--t2);stroke-width:1.4}
.footer-bottom{
  margin-top:48px;padding:20px 0;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom p{font-size:12.5px;color:var(--t3)}
.to-top{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;
  background:#fff;border:1px solid var(--line);box-shadow:var(--sh1);
  display:grid;place-items:center;z-index:40;opacity:0;visibility:hidden;
  transition:opacity .25s ease,visibility .25s ease,transform .2s ease;
}
.to-top.is-on{opacity:1;visibility:visible}
.to-top:hover{transform:translateY(-2px);box-shadow:var(--sh2)}
.to-top svg{width:18px;height:18px;stroke:var(--c-primary);fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}

/* ---------- 响应式 ---------- */
@media (min-width:1440px){
  .container{max-width:1240px}
}
@media (max-width:1199px) and (min-width:1024px){
  :root{--sidenav-w:208px}
  .hero-panel{padding:40px;gap:32px}
  .stat-row{grid-template-columns:repeat(2,1fr)}
  .metric-row{grid-template-columns:112px 1fr 180px;gap:20px}
}
@media (max-width:1023px){
  .layout{margin-left:0}
  .topbar{
    display:flex;align-items:center;gap:12px;height:56px;padding:0 16px;
    background:#fff;border-bottom:1px solid var(--line);
    position:sticky;top:0;z-index:50;transition:box-shadow .2s ease;
  }
  .topbar.is-scrolled{box-shadow:var(--sh1)}
  .topbar .btn{margin-left:auto}
  .sidenav{transform:translateX(-100%);width:280px;box-shadow:var(--sh3);border-right:0}
  .sidenav.open{transform:translateX(0)}
  .hero{padding:20px 0 0}
  .hero-panel{grid-template-columns:1fr;padding:32px;gap:26px}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .cta-band{grid-template-columns:1fr;padding:32px;gap:26px}
  .dark-band{padding:64px 0}
  .metric-row{grid-template-columns:96px 1fr;gap:16px}
  .metric-bar{display:none}
  .metric-desc{grid-column:2}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .hero-panel{padding:26px 20px;border-radius:var(--r-card)}
  .hero-copy h1{font-size:30px}
  .hero-sub{font-size:16px}
  .hero-points{flex-direction:column;gap:12px;border-top:0;padding-top:0}
  .hero-points li{border-left:0;padding-left:0;display:flex;align-items:baseline;gap:8px}
  .hero-points strong{display:inline;margin:0}
  .hero-media{border-radius:12px}
  .stat-row{grid-template-columns:1fr;gap:14px}
  .scene-grid{grid-template-columns:1fr}
  .sec-h{font-size:22px}
  .section-head{margin-bottom:24px}
  .timeline::before{left:16px}
  .tl-item{padding-left:56px;padding-bottom:28px}
  .tl-dot{width:34px;height:34px;font-size:12.5px}
  .tl-body h3{font-size:17px}
  .faq-q{padding:16px 46px 16px 18px;font-size:15px}
  .faq-a p{padding:0 46px 18px 18px}
  .cta-band{padding:24px 18px;border-radius:var(--r-card)}
  .form-card{padding:22px 18px;border-radius:var(--r-card)}
  .btn{width:100%}
  .btn-sm{width:auto}
  .footer-grid{grid-template-columns:1fr}
  .site-footer{margin-top:56px;padding-top:44px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .to-top{right:16px;bottom:16px}
}
@media (max-width:480px){
  body{font-size:15px}
  .hero-copy h1{font-size:26px}
  .stat-num{font-size:26px}
  .metric-row{grid-template-columns:1fr;gap:6px}
  .metric-desc{grid-column:auto}
}

/* roulang page: category4 */
:root{
  --brand:#2A6BB8;
  --brand-dark:#1E4E8C;
  --brand-soft:#E7EFFA;
  --accent:#E07A2F;
  --accent-soft:#FDEFE1;
  --bg:#F5F7FA;
  --card:#FFFFFF;
  --bg-2:#EDF2F8;
  --line:#DFE6EF;
  --text:#16212E;
  --text-2:#55677A;
  --text-3:#8A9AAC;
  --ok:#2F9E7B;
  --err:#D9503F;
  --r-sm:6px;
  --r-md:14px;
  --r-lg:18px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(22,33,46,.05),0 6px 18px rgba(22,33,46,.06);
  --sh-2:0 10px 28px rgba(22,33,46,.10);
  --sh-3:0 18px 44px rgba(22,33,46,.14);
  --sidebar-w:248px;
  --topbar-h:56px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}

/* ===== 布局骨架 ===== */
.layout{display:flex;min-height:100vh}
.main-wrap{margin-left:var(--sidebar-w);width:calc(100% - var(--sidebar-w));display:flex;flex-direction:column;min-height:100vh}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 28px}

/* ===== 左侧竖向导航 ===== */
.sidebar{
  position:fixed;
  inset:0 auto 0 0;
  width:var(--sidebar-w);
  background:var(--card);
  border-right:1px solid var(--line);
  box-shadow:inset -1px 0 0 rgba(22,33,46,.02);
  display:flex;
  flex-direction:column;
  padding:24px 18px 20px;
  gap:20px;
  z-index:60;
}
.side-brand{display:flex;align-items:center;gap:10px;padding:6px 6px 16px;border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{
  width:36px;height:36px;border-radius:11px;background:var(--brand-soft);
  position:relative;flex:0 0 auto;box-shadow:inset 0 0 0 1px rgba(42,107,184,.18);
}
.brand-mark::before{
  content:"";position:absolute;left:50%;top:50%;width:14px;height:21px;
  transform:translate(-50%,-50%);border:1.6px solid var(--brand);border-radius:4px;
}
.brand-mark::after{
  content:"";position:absolute;right:4px;top:5px;width:5px;height:5px;border-radius:50%;background:var(--accent);
}
.brand-text{display:flex;flex-direction:column;line-height:1.35}
.brand-text strong{font-size:15px;font-weight:700;letter-spacing:0}
.brand-text span{font-size:12px;color:var(--text-3)}
.side-nav{display:flex;flex-direction:column;gap:2px;overflow-y:auto}
.nav-group-title{font-size:12px;color:var(--text-3);letter-spacing:.04em;padding:6px 10px 8px}
.nav-link{
  position:relative;display:flex;align-items:center;min-height:44px;padding:0 12px 0 14px;
  border-radius:var(--r-sm);color:var(--text-2);font-size:14.5px;
  transition:background .18s ease,color .18s ease;
}
.nav-link::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:0;border-radius:2px;background:var(--brand);transition:height .18s ease;
}
.nav-link:hover{background:var(--brand-soft);color:var(--brand-dark)}
.nav-link.active{color:var(--brand-dark);font-weight:600;background:var(--brand-soft)}
.nav-link.active::before{height:20px}
.side-card{
  margin-top:auto;background:var(--bg-2);border-radius:var(--r-md);
  padding:16px;display:flex;flex-direction:column;gap:10px;
}
.side-card-label{font-size:12px;color:var(--text-3);letter-spacing:.04em}
.countdown-mini{
  font-size:22px;font-weight:700;color:var(--brand-dark);
  font-variant-numeric:tabular-nums;letter-spacing:-.01em;
}
.side-card .btn{width:100%;justify-content:center}

/* ===== 顶部栏（移动端） ===== */
.topbar{
  position:sticky;top:0;z-index:70;
  display:none;align-items:center;gap:12px;
  height:var(--topbar-h);padding:0 16px;
  background:rgba(255,255,255,.96);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.topbar.scrolled{box-shadow:0 6px 18px rgba(22,33,46,.08)}
.topbar .brand{flex:1;min-width:0}
.topbar .brand-text strong{font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.burger{
  width:38px;height:38px;flex:0 0 auto;border:1px solid var(--line);background:var(--card);
  border-radius:10px;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;
}
.burger span{display:block;width:16px;height:1.6px;background:var(--text);position:relative}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:16px;height:1.6px;background:var(--text);
}
.burger span::before{top:-5px}
.burger span::after{top:5px}
.overlay{
  position:fixed;inset:0;background:rgba(22,33,46,.45);
  opacity:0;visibility:hidden;transition:opacity .22s ease,visibility .22s ease;z-index:80;
}
.overlay.show{opacity:1;visibility:visible}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--r-pill);
  border:1px solid transparent;font-size:15px;font-weight:600;
  cursor:pointer;white-space:nowrap;
  transition:background .18s ease,color .18s ease,box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.btn-sm{min-height:38px;padding:0 18px;font-size:14px}
.btn-primary{background:var(--accent);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:#cf6b25;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn-ghost{background:#fff;color:var(--brand-dark);border-color:rgba(42,107,184,.45)}
.btn-ghost:hover{background:var(--brand-soft);border-color:var(--brand)}
.btn-link{
  color:var(--brand-dark);font-weight:600;font-size:14.5px;
  border-bottom:1px solid rgba(42,107,184,.4);padding-bottom:2px;
  transition:color .18s ease,border-color .18s ease;
}
.btn-link:hover{color:var(--accent);border-color:var(--accent)}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}

/* ===== 徽章 / 标签 ===== */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:600;line-height:1.7;
}
.badge-brand{background:var(--brand-soft);color:var(--brand-dark)}
.badge-accent{background:var(--accent-soft);color:#B85F19}
.badge-soft{background:var(--bg-2);color:var(--text-2);font-weight:500}

/* ===== 首屏 ===== */
.hero{padding:56px 0 40px}
.hero-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:20px;align-items:center}
.hero-copy{grid-column:1 / span 7}
.hero-figure{grid-column:8 / span 5}
.hero h1{
  font-size:clamp(30px,3.6vw,44px);line-height:1.2;font-weight:700;letter-spacing:0;
  margin:14px 0 0;
}
.hero-sub{font-size:17px;color:var(--text-2);margin-top:12px;max-width:32em}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-meta{display:flex;flex-wrap:wrap;gap:26px;margin-top:30px;padding-top:22px;border-top:1px solid var(--line)}
.hero-meta-item{display:flex;gap:9px;align-items:baseline;font-size:14px;color:var(--text-2)}
.hero-meta-item b{font-size:19px;color:var(--brand-dark);font-variant-numeric:tabular-nums;font-weight:700}
.hero-figure{position:relative}
.hero-figure img{
  width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-lg);box-shadow:var(--sh-1);
}
.hero-figure .float-tag{
  position:absolute;left:16px;bottom:16px;background:rgba(255,255,255,.94);
  border-radius:var(--r-pill);padding:6px 14px;font-size:12.5px;color:var(--brand-dark);font-weight:600;
  box-shadow:var(--sh-1);
}

/* ===== 通用板块 ===== */
.section{padding:88px 0}
.section-alt{background:var(--bg-2)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:34px}
.section-head h2{
  position:relative;font-size:26px;line-height:1.35;font-weight:700;padding-left:14px;
}
.section-head h2::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:4px;height:22px;border-radius:2px;background:var(--brand);
}
.section-head p{font-size:14.5px;color:var(--text-2);margin-top:8px;padding-left:14px;max-width:46em}
.section-head .head-right{font-size:14px;color:var(--text-3)}

/* ===== 宽幅图文卡 ===== */
.wide-stack{display:flex;flex-direction:column;gap:28px}
.wide-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);transition:box-shadow .2s ease,transform .2s ease;
}
.wide-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.wide-card figure{margin:0;position:relative}
.wide-card img{width:100%;aspect-ratio:15/8;object-fit:cover}
.wide-card figcaption{
  position:absolute;left:0;bottom:0;right:0;
  padding:34px 24px 14px;font-size:13px;color:#fff;
  background:linear-gradient(180deg,rgba(22,33,46,0) 0%,rgba(22,33,46,.62) 100%);
}
.wide-body{padding:26px 28px 30px}
.wide-body h3{font-size:19px;line-height:1.5;font-weight:600;margin-bottom:10px}
.wide-body p{color:var(--text-2);font-size:15px}
.point-row{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:22px;padding-top:22px;border-top:1px solid var(--line)}
.point-row li{font-size:13.8px;color:var(--text-2);padding-left:14px;position:relative;line-height:1.75}
.point-row li::before{
  content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:1px;background:var(--brand);
}
.point-row li b{display:block;color:var(--text);font-size:14.5px;font-weight:600;margin-bottom:2px}

/* ===== 要点对比表 ===== */
.table-wrap{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:8px 24px 16px;box-shadow:var(--sh-1);
}
.compare-table{width:100%;border-collapse:collapse;font-size:15px}
.compare-table caption{text-align:left;font-size:13px;color:var(--text-3);padding:16px 0 12px}
.compare-table th{
  text-align:left;font-size:13.5px;font-weight:600;color:var(--brand-dark);
  background:var(--brand-soft);padding:12px 16px;
}
.compare-table th:first-child{border-radius:var(--r-sm) 0 0 var(--r-sm)}
.compare-table th:last-child{border-radius:0 var(--r-sm) var(--r-sm) 0}
.compare-table td{padding:15px 16px;border-bottom:1px solid var(--line);color:var(--text-2);vertical-align:top}
.compare-table tbody tr:nth-child(even) td{background:#FAFCFE}
.compare-table td:first-child{font-weight:600;color:var(--text);white-space:nowrap}
.compare-table tbody tr:last-child td{border-bottom:0}
.compare-table .note{color:var(--text-3);font-size:13.8px}

/* ===== 排查步骤条 ===== */
.steps{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);
}
.step-item{padding:26px 24px;border-right:1px solid var(--line);position:relative}
.step-item:last-child{border-right:0}
.step-no{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:50%;
  border:1.6px solid var(--brand);color:var(--brand-dark);
  font-size:13.5px;font-weight:700;font-variant-numeric:tabular-nums;
}
.step-item h3{font-size:16px;font-weight:600;margin:14px 0 6px}
.step-item p{font-size:13.8px;color:var(--text-2)}

/* ===== FAQ 手风琴 ===== */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:920px}
.faq-item{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;transition:box-shadow .2s ease,border-color .2s ease;
}
.faq-item:hover{box-shadow:var(--sh-1)}
.faq-item.open{border-color:rgba(42,107,184,.4);box-shadow:var(--sh-1)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;text-align:left;
  background:none;border:0;cursor:pointer;padding:18px 20px 18px 22px;
  font-size:16px;font-weight:600;color:var(--text);
}
.faq-q::before{
  content:"";position:absolute;left:0;width:3px;height:0;background:var(--accent);
  border-radius:2px;transition:height .2s ease;
}
.faq-item{position:relative}
.faq-item.open .faq-q::before{height:26px}
.faq-q .arrow{
  margin-left:auto;flex:0 0 auto;width:18px;height:18px;color:var(--text-3);
  transition:transform .22s ease,color .22s ease;
}
.faq-item.open .arrow{transform:rotate(180deg);color:var(--brand)}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .28s ease,padding .28s ease;
  padding:0 20px 0 22px;
}
.faq-item.open .faq-a{max-height:420px;padding:0 20px 20px 22px}
.faq-a p{font-size:14.8px;color:var(--text-2)}

/* ===== CTA 条 ===== */
.cta-band{padding:0 0 88px}
.cta-panel{
  background:var(--brand-soft);border-radius:var(--r-lg);
  padding:36px 40px;display:flex;flex-wrap:wrap;align-items:center;gap:24px;
  justify-content:space-between;border:1px solid rgba(42,107,184,.14);
}
.cta-panel h2{font-size:23px;line-height:1.4;font-weight:700}
.cta-panel p{font-size:14.5px;color:var(--text-2);margin-top:8px;max-width:44em}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ===== 页脚 ===== */
.site-footer{background:#F0F3F8;border-top:1px solid var(--line);margin-top:auto}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:34px;
  padding:56px 0 34px;
}
.site-footer .brand{padding:0;border:0}
.footer-about p{font-size:14px;color:var(--text-2);margin-top:16px;max-width:34em}
.site-footer h4{font-size:15px;font-weight:600;margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{font-size:14px;color:var(--text-2);transition:color .18s ease,padding-left .18s ease}
.footer-links a:hover{color:var(--brand-dark);padding-left:3px}
.footer-contact li{font-size:13.8px;color:var(--text-2)}
.qr{
  margin-top:16px;width:74px;height:74px;border-radius:var(--r-sm);
  background:#fff;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;
}
.qr svg{width:44px;height:44px;fill:none;stroke:var(--brand);stroke-width:1.4}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0 26px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}

/* ===== 回到顶部 ===== */
.back-top{
  position:fixed;right:24px;bottom:28px;z-index:65;
  width:44px;height:44px;border-radius:50%;border:1px solid var(--line);
  background:#fff;box-shadow:var(--sh-1);display:inline-flex;align-items:center;justify-content:center;
  cursor:pointer;opacity:0;visibility:hidden;transition:opacity .2s ease,visibility .2s ease,transform .2s ease;
}
.back-top.show{opacity:1;visibility:visible}
.back-top:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.back-top svg{width:18px;height:18px;stroke:var(--brand-dark);stroke-width:1.8;fill:none}

/* ===== 断点 ===== */
@media (min-width:1440px){
  .container{max-width:1240px}
}
@media (max-width:1199px){
  :root{--sidebar-w:208px}
  .hero-copy{grid-column:1 / span 7}
  .hero-figure{grid-column:8 / span 5}
}
@media (max-width:1023px){
  .layout{display:block}
  .main-wrap{margin-left:0;width:100%}
  .topbar{display:flex}
  .sidebar{
    transform:translateX(-100%);
    transition:transform .26s ease;
    width:280px;box-shadow:var(--sh-3);
  }
  .sidebar.open{transform:translateX(0)}
  .hero{padding:36px 0 30px}
  .hero-grid{grid-template-columns:1fr;gap:26px}
  .hero-copy,.hero-figure{grid-column:1 / -1}
  .hero-figure img{aspect-ratio:16/10}
  .section{padding:64px 0}
  .steps{grid-template-columns:repeat(2,1fr)}
  .step-item:nth-child(2){border-right:0}
  .step-item:nth-child(1),.step-item:nth-child(2){border-bottom:1px solid var(--line)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  body{font-size:15.5px}
  .container{padding:0 18px}
  .section{padding:56px 0}
  .section-head h2{font-size:22px}
  .hero h1{font-size:30px}
  .hero-sub{font-size:16px}
  .hero-actions .btn{flex:1 1 100%}
  .hero-meta{gap:18px}
  .point-row{grid-template-columns:1fr;gap:12px}
  .wide-body{padding:22px 20px 24px}
  .wide-card img{aspect-ratio:4/3}
  .table-wrap{padding:6px 16px 14px;background:transparent;border:0;box-shadow:none}
  .compare-table caption{padding:0 0 12px}
  .compare-table thead{display:none}
  .compare-table,.compare-table tbody,.compare-table tr,.compare-table td{display:block;width:100%}
  .compare-table tbody tr{
    background:#fff;border:1px solid var(--line);border-radius:12px;
    padding:6px 16px;margin-bottom:12px;box-shadow:var(--sh-1);
  }
  .compare-table td{
    display:flex;gap:16px;justify-content:space-between;border-bottom:1px dashed var(--line);
    padding:11px 0;background:none !important;font-size:14.5px;
  }
  .compare-table td:last-child{border-bottom:0}
  .compare-table td::before{
    content:attr(data-label);color:var(--text-3);font-size:13px;flex:0 0 auto;font-weight:500;
  }
  .compare-table td:first-child{color:var(--text);font-weight:600;white-space:normal}
  .steps{grid-template-columns:1fr}
  .step-item{border-right:0;border-bottom:1px solid var(--line)}
  .step-item:last-child{border-bottom:0}
  .cta-band{padding:0 0 56px}
  .cta-panel{padding:26px 22px;flex-direction:column;align-items:stretch}
  .cta-actions .btn{flex:1 1 100%}
  .footer-grid{grid-template-columns:1fr;padding:40px 0 26px}
  .back-top{right:16px;bottom:18px}
}
@media (max-width:480px){
  .container{padding:0 15px}
  .topbar{padding:0 14px}
  .brand-text strong{font-size:14px}
  .hero h1{font-size:27px}
  .faq-q{font-size:15px;padding:16px 16px 16px 18px}
  .faq-a{padding:0 16px 0 18px}
  .faq-item.open .faq-a{padding:0 16px 18px 18px}
}