/* roulang page: index */
:root{
  --primary:#1E4ED8;
  --primary-strong:#173FB0;
  --accent:#FF6B1A;
  --accent-strong:#E85A0C;
  --mint:#12B981;
  --danger:#E5484D;
  --ink:#0D1526;
  --ink-deep:#0E1B33;
  --body:#4B5568;
  --muted:#8892A6;
  --bg:#F4F7FC;
  --surface:#FFFFFF;
  --surface-2:#EEF3FB;
  --line:#E2E8F4;
  --r-block:20px;
  --r-card:16px;
  --r-btn:12px;
  --shadow-card:0 1px 2px rgba(16,36,84,.04), 0 12px 28px -12px rgba(16,36,84,.10);
  --shadow-card-hover:0 18px 40px -16px rgba(16,36,84,.18);
  --shadow-dock:0 10px 30px -12px rgba(16,36,84,.22);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-num:"Inter","Segoe UI",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--body);
  background:var(--bg);
  padding-top:96px;
}
img{max-width:100%;display:block;}
a{color:var(--ink);text-decoration:none;transition:color .18s ease,border-color .18s ease;}
a:hover{color:var(--primary);}
button{font-family:inherit;font-size:inherit;cursor:pointer;}
h1,h2,h3,h4{color:var(--ink);margin:0;line-height:1.3;font-weight:700;}
h1{font-size:clamp(32px,5vw,48px);font-weight:800;}
h2{font-size:clamp(24px,3vw,32px);}
h3{font-size:20px;font-weight:600;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
dl,dd,dt{margin:0;}
figure{margin:0;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section--alt{background:var(--surface-2);}
.section__head{max-width:760px;margin-bottom:40px;}
.section__head p{margin-top:14px;font-size:16px;color:var(--body);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-num);font-size:13px;font-weight:600;letter-spacing:.08em;
  text-transform:uppercase;color:var(--primary);
  background:rgba(30,78,216,.08);border-radius:999px;padding:5px 12px;margin-bottom:16px;
}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  transition:background-color .18s ease,color .18s ease,box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.btn:active{transform:translateY(1px);}
.btn[disabled],.btn.is-disabled{opacity:.6;cursor:not-allowed;transform:none;}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 10px 24px -12px rgba(255,107,26,.7);}
.btn-accent:hover{background:var(--accent-strong);color:#fff;}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-strong);color:#fff;}
.btn-ghost{background:#fff;color:var(--primary);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary-strong);}
.btn-outline{background:transparent;color:var(--primary);border-color:var(--primary);}
.btn-outline:hover{background:rgba(30,78,216,.08);color:var(--primary-strong);}
.btn-sm{padding:10px 18px;font-size:14px;}
.btn-light{background:#fff;color:var(--ink);}
.btn-light:hover{background:var(--surface-2);color:var(--primary);}
.btn-block{width:100%;}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;}

/* ===== Dock 导航 ===== */
.dock-wrap{position:fixed;top:16px;left:0;right:0;z-index:120;display:flex;justify-content:center;pointer-events:none;}
.dock{
  pointer-events:auto;
  width:min(1120px,calc(100% - 32px));
  height:64px;display:flex;align-items:center;gap:20px;
  padding:0 14px 0 18px;
  background:#fff;border:1px solid var(--line);border-radius:20px;
  box-shadow:var(--shadow-dock);
  transition:height .22s ease,box-shadow .22s ease;
}
.dock-wrap.is-shrink .dock{height:60px;box-shadow:0 14px 34px -12px rgba(16,36,84,.32);}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:36px;height:36px;border-radius:11px;background:var(--primary);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-num);font-size:15px;font-weight:800;letter-spacing:.02em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:15px;color:var(--ink);font-weight:700;}
.brand-text em{font-style:normal;font-size:11px;color:var(--muted);letter-spacing:.04em;}
.dock-nav{display:flex;align-items:center;gap:4px;margin-left:8px;}
.dock-nav a{
  position:relative;display:block;padding:9px 12px;border-radius:10px;
  font-size:14.5px;font-weight:500;color:var(--body);
}
.dock-nav a:hover{background:var(--surface-2);color:var(--ink);}
.dock-nav a.is-active{color:var(--ink);font-weight:600;}
.dock-nav a.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:3px;height:2px;
  border-radius:2px;background:var(--accent);
}
.dock-actions{display:flex;align-items:center;gap:10px;margin-left:auto;flex-shrink:0;}
.icon-btn{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:#fff;
  display:flex;align-items:center;justify-content:center;color:var(--body);
  transition:border-color .18s ease,color .18s ease,background-color .18s ease;
}
.icon-btn:hover{border-color:var(--primary);color:var(--primary);background:rgba(30,78,216,.06);}
.burger{display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:#fff;padding:0;flex-direction:column;align-items:center;justify-content:center;gap:4px;}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:transform .2s ease,opacity .2s ease;}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0;}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* 移动抽屉 */
.drawer{
  position:fixed;inset:0;z-index:130;background:#fff;
  padding:88px 24px 120px;overflow-y:auto;
  transform:translateX(100%);transition:transform .26s ease;visibility:hidden;
}
.drawer.is-open{transform:translateX(0);visibility:visible;}
.drawer-group{margin-bottom:28px;}
.drawer-group h4{font-size:12px;letter-spacing:.12em;color:var(--muted);font-weight:600;text-transform:uppercase;margin-bottom:10px;}
.drawer-group a{display:block;padding:14px 4px;font-size:17px;font-weight:600;color:var(--ink);border-bottom:1px solid var(--line);}
.drawer-group a.is-active{color:var(--primary);}
.drawer-bar{
  position:fixed;right:20px;bottom:20px;z-index:140;
  opacity:0;pointer-events:none;transition:opacity .24s ease;
}
.drawer-bar.is-show{opacity:1;pointer-events:auto;}
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:110;display:none;
  padding:10px 20px calc(10px + env(safe-area-inset-bottom));
  background:rgba(255,255,255,.96);border-top:1px solid var(--line);
  backdrop-filter:saturate(140%) blur(6px);
}
body.drawer-open{overflow:hidden;}

/* ===== Hero ===== */
.hero{position:relative;padding:56px 0 72px;overflow:hidden;}
.hero::before{
  content:"";position:absolute;top:-90px;right:-160px;width:760px;height:640px;
  background:url("/assets/images/backpic/back-1.webp") no-repeat center right;
  background-size:cover;opacity:.13;border-radius:40px;pointer-events:none;
}
.hero__grid{position:relative;display:grid;grid-template-columns:5fr 6fr;gap:56px;align-items:center;}
.hero h1{margin-bottom:18px;}
.hero h1 .hl{color:var(--primary);}
.hero__lead{font-size:18px;line-height:1.8;color:var(--body);max-width:520px;}
.hero__meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.chip{
  display:inline-flex;align-items:center;gap:6px;padding:6px 13px;border-radius:999px;
  background:#fff;border:1px solid var(--line);font-size:13px;color:var(--body);
}
.chip .dot{width:6px;height:6px;border-radius:50%;background:var(--mint);}
.hero__actions{margin-top:28px;}
.hero__facts{
  display:flex;flex-wrap:wrap;gap:22px;margin-top:20px;font-size:13px;color:var(--muted);
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
}
.hero__facts b{color:var(--ink);font-weight:600;}
.hero__visual{position:relative;}
.shot-card{
  border-radius:var(--r-block);overflow:hidden;background:var(--surface-2);
  border:1px solid var(--line);box-shadow:var(--shadow-card);
}
.shot-card img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.shot-card--sub{
  position:absolute;right:-12px;bottom:-34px;width:46%;
  background:#fff;border-radius:var(--r-card);box-shadow:var(--shadow-card-hover);
}
.shot-card--sub img{aspect-ratio:16/10;border-radius:var(--r-card);}
.hero__rate{
  position:absolute;left:-14px;top:22px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);padding:12px 16px;box-shadow:var(--shadow-card);
  display:flex;align-items:center;gap:10px;
}
.hero__rate strong{font-family:var(--font-num);font-size:20px;color:var(--ink);}
.hero__rate span{font-size:12px;color:var(--muted);line-height:1.4;}
.hero__band{
  margin-top:44px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:18px 22px;display:flex;flex-wrap:wrap;align-items:center;gap:16px 28px;
  box-shadow:var(--shadow-card);
}
.hero__band .band-item{font-size:13.5px;color:var(--muted);display:flex;align-items:center;gap:8px;}
.hero__band .band-item b{color:var(--ink);font-family:var(--font-num);font-variant-numeric:tabular-nums;}

/* ===== 价值点 ===== */
.value-layout{display:grid;grid-template-columns:300px 1fr;gap:48px;align-items:start;}
.value-head{position:sticky;top:110px;}
.value-head h2{margin-bottom:14px;}
.value-head p{font-size:15.5px;}
.value-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.value-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--shadow-card);
  transition:transform .2s ease,box-shadow .2s ease;
}
.value-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-card-hover);}
.value-card .num{
  font-family:var(--font-num);font-size:13px;font-weight:700;color:var(--accent);letter-spacing:.08em;
}
.value-card h3{margin:12px 0 10px;}
.value-card p{font-size:15px;line-height:1.7;}
.value-card--wide{grid-column:1 / -1;display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:center;}
.value-card--wide img{border-radius:12px;aspect-ratio:16/10;object-fit:cover;background:var(--surface-2);}
.value-list{margin-top:14px;display:grid;gap:8px;}
.value-list li{position:relative;padding-left:18px;font-size:14.5px;color:var(--body);}
.value-list li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:2px;background:var(--primary);}

/* ===== 轮播 ===== */
.carousel{position:relative;}
.carousel-track{
  display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:6px 2px 18px;scrollbar-width:none;
}
.carousel-track::-webkit-scrollbar{display:none;}
.shot{
  flex:0 0 clamp(280px,52%,620px);scroll-snap-align:start;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--shadow-card);
}
.shot img{width:100%;aspect-ratio:16/10;object-fit:cover;background:var(--surface-2);}
.shot figcaption{padding:16px 18px 18px;}
.shot figcaption strong{display:block;font-size:16px;color:var(--ink);font-weight:600;margin-bottom:6px;}
.shot figcaption span{font-size:14px;color:var(--muted);}
.car-btn{
  position:absolute;top:38%;width:40px;height:40px;border-radius:50%;
  background:#fff;border:1px solid var(--line);color:var(--ink);
  display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-card);
  transition:border-color .18s ease,color .18s ease,transform .18s ease;
}
.car-btn:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-1px);}
.car-prev{left:-8px;}
.car-next{right:-8px;}
.car-thumbs{display:flex;gap:12px;overflow-x:auto;padding:6px 2px;scrollbar-width:none;}
.car-thumbs::-webkit-scrollbar{display:none;}
.car-thumb{
  flex:0 0 116px;padding:0;border-radius:12px;overflow:hidden;background:#fff;
  border:1px solid var(--line);transition:border-color .18s ease,transform .18s ease;
}
.car-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.car-thumb:hover{transform:translateY(-2px);}
.car-thumb.is-current{border:2px solid var(--accent);}

/* ===== 系统要求 ===== */
.req-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.req-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:26px;box-shadow:var(--shadow-card);}
.req-card h3{margin-bottom:6px;}
.req-card .req-note{font-size:14px;color:var(--muted);margin-bottom:16px;}
.req-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:13px 0;border-bottom:1px dashed var(--line);}
.req-row:last-child{border-bottom:0;}
.req-row dt{font-size:14.5px;color:var(--body);}
.req-row dd{font-size:14.5px;color:var(--ink);font-family:var(--font-num);display:flex;align-items:center;gap:10px;text-align:right;}
.badge{display:inline-flex;align-items:center;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600;line-height:1.6;white-space:nowrap;}
.badge-ok{background:rgba(18,185,129,.12);color:#0B8C61;}
.badge-min{background:var(--surface-2);color:var(--body);}
.badge-no{background:#F1F3F8;color:var(--muted);text-decoration:line-through;}

/* ===== 评价墙 ===== */
.review-lead{
  display:grid;grid-template-columns:1.4fr .6fr;gap:28px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-block);
  padding:32px;box-shadow:var(--shadow-card);margin-bottom:24px;
}
.review-lead blockquote{font-size:17px;line-height:1.85;color:var(--ink);position:relative;padding-left:18px;}
.review-lead blockquote::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:4px;background:var(--primary);}
.review-lead .lead-aside{border-left:1px solid var(--line);padding-left:26px;}
.review-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.review-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:24px;box-shadow:var(--shadow-card);}
.review-card:nth-child(2){margin-top:28px;}
.review-top{display:flex;align-items:center;gap:12px;margin-bottom:14px;}
.avatar{width:44px;height:44px;border-radius:50%;background:var(--surface-2);color:var(--primary);display:flex;align-items:center;justify-content:center;font-weight:700;font-family:var(--font-num);}
.review-top strong{display:block;font-size:15px;color:var(--ink);}
.review-top span{font-size:12.5px;color:var(--muted);}
.stars{color:var(--accent);letter-spacing:2px;font-size:14px;margin-bottom:8px;}
.review-card p{font-size:15px;line-height:1.75;color:var(--body);}

/* ===== 下载 CTA ===== */
.download{
  background:var(--ink-deep);border-radius:var(--r-block);padding:48px;color:#fff;
  display:grid;grid-template-columns:1.2fr .8fr;gap:48px;
}
.download h2{color:#fff;margin-bottom:14px;}
.download p{color:rgba(255,255,255,.76);font-size:15.5px;}
.download .btn-row{margin-top:26px;}
.download .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.35);}
.download .btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff;}
.dl-meta{display:flex;flex-wrap:wrap;gap:18px 26px;margin-top:26px;font-size:13px;color:rgba(255,255,255,.66);font-family:var(--font-num);font-variant-numeric:tabular-nums;}
.dl-meta b{color:#fff;font-weight:600;}
.dl-side{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:var(--r-card);padding:24px;}
.qr{
  width:132px;height:132px;border-radius:12px;margin:0 auto 16px;
  background:
    repeating-conic-gradient(#0E1B33 0 25%,#ffffff 0 50%);
  background-size:18px 18px;border:6px solid #fff;
}
.dl-side .qr-tip{text-align:center;font-size:13px;color:rgba(255,255,255,.7);}
.form-field{margin-top:18px;}
.form-field label{display:block;font-size:14px;color:rgba(255,255,255,.86);margin-bottom:8px;}
.form-field .req{color:var(--accent);}
.input{
  width:100%;height:48px;padding:0 14px;border-radius:12px;border:1px solid var(--line);
  background:#fff;color:var(--ink);font-size:15px;font-family:inherit;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.input::placeholder{color:var(--muted);}
.input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px rgba(30,78,216,.10);}
.form-msg{margin-top:12px;font-size:14px;padding:10px 14px;border-radius:12px;display:none;}
.form-msg.is-error{display:block;background:rgba(229,72,77,.12);color:#FFB4B6;border:1px solid rgba(229,72,77,.4);}
.form-msg.is-ok{display:block;background:rgba(18,185,129,.14);color:#7FE8C4;border:1px solid rgba(18,185,129,.4);}

/* ===== 最新信息 ===== */
.news-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:24px;}
.news-lead{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-block);overflow:hidden;box-shadow:var(--shadow-card);
  transition:transform .2s ease,box-shadow .2s ease;
}
.news-lead:hover{transform:translateY(-3px);box-shadow:var(--shadow-card-hover);}
.news-lead img{width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--surface-2);}
.news-lead .body{padding:26px;}
.news-side{display:grid;gap:20px;align-content:start;}
.news-card{
  display:grid;grid-template-columns:132px 1fr;gap:18px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:14px;box-shadow:var(--shadow-card);
  transition:transform .2s ease,box-shadow .2s ease;
}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-card-hover);}
.news-card img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:12px;background:var(--surface-2);}
.tag{
  display:inline-flex;align-items:center;padding:3px 10px;border-radius:999px;
  background:rgba(30,78,216,.08);color:var(--primary);font-size:12px;font-weight:600;
}
.news-title{display:block;margin:10px 0 8px;font-size:17px;font-weight:600;color:var(--ink);line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-card .news-title{font-size:15.5px;}
.news-sum{font-size:14.5px;color:var(--body);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.news-card .news-sum{-webkit-line-clamp:2;}
.news-time{display:block;margin-top:12px;font-size:13px;color:var(--muted);font-family:var(--font-num);}
.empty-state{
  min-height:220px;background:#fff;border:1px dashed var(--line);border-radius:var(--r-block);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
  text-align:center;padding:32px;
}
.empty-state .empty-icon{width:52px;height:52px;border-radius:16px;background:var(--surface-2);display:flex;align-items:center;justify-content:center;color:var(--primary);font-weight:700;font-family:var(--font-num);}
.empty-state strong{color:var(--ink);font-size:16px;}
.empty-state span{font-size:14px;color:var(--muted);}

/* ===== FAQ ===== */
.faq{max-width:900px;margin:0 auto;}
.faq details{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  margin-bottom:12px;overflow:hidden;transition:background-color .2s ease,border-color .2s ease;
}
.faq details[open]{background:var(--surface-2);border-color:#D6DFF0;}
.faq summary{
  list-style:none;cursor:pointer;padding:18px 22px;min-height:56px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:16px;font-weight:600;color:var(--ink);
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{
  content:"+";font-family:var(--font-num);font-size:22px;line-height:1;color:var(--primary);
  transition:transform .2s ease;flex-shrink:0;
}
.faq details[open] summary::after{transform:rotate(45deg);}
.faq .answer{padding:0 22px 20px;font-size:15px;line-height:1.8;color:var(--body);}

/* ===== 页脚 ===== */
.footer{background:var(--ink-deep);color:rgba(255,255,255,.72);padding:64px 0 0;margin-top:96px;}
.footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}
.footer h4{font-size:14px;font-weight:400;color:var(--mint);margin-bottom:18px;letter-spacing:.04em;}
.footer .brand-text strong{color:#fff;}
.footer .brand-text em{color:rgba(255,255,255,.5);}
.footer .brand-mark{background:#fff;color:var(--primary);}
.footer p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);margin-top:16px;}
.footer ul li{margin-bottom:10px;}
.footer ul a{
  display:inline-block;position:relative;font-size:14px;color:rgba(255,255,255,.72);
  padding-left:0;transition:color .18s ease,padding-left .18s ease;
}
.footer ul a::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:2px;border-radius:2px;
  background:var(--accent);opacity:0;transition:opacity .18s ease;
}
.footer ul a:hover{color:#fff;padding-left:12px;}
.footer ul a:hover::before{opacity:1;}
.footer__bottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.12);padding:22px 0 28px;
  display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.5);
}
.footer__bottom a{color:rgba(255,255,255,.6);}
.footer__bottom a:hover{color:#fff;}

/* ===== 回到顶部 ===== */
.to-top{
  position:fixed;right:24px;bottom:28px;z-index:100;
  width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:#fff;
  color:var(--primary);display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-card);opacity:0;pointer-events:none;transition:opacity .22s ease,transform .22s ease;
}
.to-top.is-show{opacity:1;pointer-events:auto;}
.to-top:hover{transform:translateY(-3px);box-shadow:var(--shadow-card-hover);}

/* ===== 响应式 ===== */
@media (max-width:1279px){
  .hero__grid{gap:40px;}
}
@media (max-width:1023px){
  body{padding-top:88px;}
  .section{padding:72px 0;}
  .dock-nav{display:none;}
  .burger{display:flex;}
  .dock{padding:0 12px 0 14px;gap:12px;}
  .hero{padding:36px 0 56px;}
  .hero__grid{grid-template-columns:1fr;gap:40px;}
  .hero__lead{max-width:none;}
  .hero::before{width:520px;height:440px;opacity:.10;}
  .value-layout{grid-template-columns:1fr;gap:32px;}
  .value-head{position:static;}
  .download{grid-template-columns:1fr;gap:32px;padding:36px;}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  body{padding-top:80px;padding-bottom:72px;}
  .section{padding:56px 0;}
  .container{padding:0 20px;}
  .dock{height:56px;border-radius:18px;width:calc(100% - 20px);}
  .dock-wrap{top:10px;}
  .dock-wrap.is-shrink .dock{height:52px;}
  .dock-actions .btn-accent{display:none;}
  .hero__meta{gap:8px;}
  .hero__band{padding:16px;gap:12px 20px;}
  .shot-card--sub{position:static;width:100%;margin-top:14px;}
  .hero__rate{position:static;margin-top:14px;display:inline-flex;}
  .value-grid{grid-template-columns:1fr;}
  .value-card--wide{grid-template-columns:1fr;}
  .req-grid{grid-template-columns:1fr;}
  .review-lead{grid-template-columns:1fr;}
  .review-lead .lead-aside{border-left:0;border-top:1px solid var(--line);padding-left:0;padding-top:20px;}
  .review-grid{grid-template-columns:1fr;}
  .review-card:nth-child(2){margin-top:0;}
  .download{padding:28px 22px;}
  .news-grid{grid-template-columns:1fr;}
  .news-card{grid-template-columns:104px 1fr;gap:14px;}
  .faq summary{padding:16px 18px;font-size:15px;}
  .faq .answer{padding:0 18px 18px;}
  .footer{padding:48px 0 0;margin-top:56px;}
  .footer__grid{grid-template-columns:1fr;gap:28px;}
  .to-top{bottom:88px;right:16px;}
  .mobile-bar{display:block;}
}
@media (max-width:479px){
  h1{font-size:30px;}
  .container{padding:0 16px;}
  .btn{padding:12px 18px;font-size:14px;}
  .btn-row{gap:10px;}
  .btn-row .btn{flex:1 1 100%;}
  .shot{flex-basis:88%;}
  .car-prev{left:-4px;}
  .car-next{right:-4px;}
  .news-card{grid-template-columns:1fr;}
  .news-card img{aspect-ratio:16/9;}
}

/* roulang page: category1 */
:root{
  --primary:#1E4ED8;
  --primary-strong:#173FB0;
  --accent:#FF6B1A;
  --accent-strong:#E85A0C;
  --mint:#12B981;
  --danger:#E5484D;
  --ink:#0D1526;
  --ink-deep:#0E1B33;
  --body:#4B5568;
  --muted:#8892A6;
  --bg:#F4F7FC;
  --surface:#FFFFFF;
  --surface-2:#EEF3FB;
  --line:#E2E8F4;
  --radius-lg:20px;
  --radius:16px;
  --radius-sm:12px;
  --shadow-card:0 1px 2px rgba(16,36,84,.04), 0 12px 28px -12px rgba(16,36,84,.10);
  --shadow-hover:0 18px 40px -16px rgba(16,36,84,.18);
  --shadow-dock:0 10px 30px -12px rgba(16,36,84,.22);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--body);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink);line-height:1.32;font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block}
a{color:var(--ink);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--primary)}
button{font-family:inherit}
input,select,textarea{font-family:inherit;font-size:15px;color:var(--ink)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}

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

/* ---------- 浮动 Dock 导航 ---------- */
.dock-wrap{
  position:fixed;top:16px;left:0;right:0;z-index:120;
  display:flex;justify-content:center;padding:0 16px;
  pointer-events:none;
}
.dock{
  pointer-events:auto;
  width:min(1120px,100%);
  height:64px;
  display:flex;align-items:center;gap:18px;
  padding:0 14px 0 18px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:20px;
  box-shadow:var(--shadow-dock);
  transition:height .25s ease,box-shadow .25s ease;
}
.dock-wrap.is-scrolled .dock{height:60px;box-shadow:0 16px 38px -14px rgba(16,36,84,.30)}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--primary);color:#fff;
  display:grid;place-items:center;font-size:13px;font-weight:800;letter-spacing:.03em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:15px;font-weight:800;color:var(--ink)}
.brand-text em{font-style:normal;font-size:11px;color:var(--muted);letter-spacing:.05em}
.dock-nav{display:flex;align-items:center;gap:2px;margin:0 auto}
.dock-nav a{
  position:relative;display:inline-block;padding:9px 12px;border-radius:var(--radius-sm);
  font-size:14.5px;font-weight:600;color:var(--body);
}
.dock-nav a:hover{color:var(--primary);background:var(--surface-2)}
.dock-nav a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:3px;height:2px;
  border-radius:2px;background:transparent;transition:background .18s ease;
}
.dock-nav a.is-active{color:var(--ink)}
.dock-nav a.is-active::after{background:var(--accent)}
.dock-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto}
.icon-btn{
  width:38px;height:38px;border-radius:50%;border:1px solid var(--line);
  background:var(--surface);color:var(--body);display:grid;place-items:center;
  cursor:pointer;transition:.18s ease;
}
.icon-btn:hover{color:var(--primary);background:var(--surface-2);border-color:#c9d7f5}
.burger{
  display:none;width:38px;height:38px;border:1px solid var(--line);background:var(--surface);
  border-radius:10px;padding:0;cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.burger span{display:block;width:16px;height:2px;border-radius:2px;background:var(--ink);transition:.2s ease}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  cursor:pointer;white-space:nowrap;
  transition:transform .18s ease,background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-lg{height:50px;padding:0 26px;font-size:16px}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 10px 20px -12px rgba(255,107,26,.9)}
.btn-accent:hover{background:var(--accent-strong);color:#fff;transform:translateY(-1px)}
.btn-accent:active{transform:translateY(1px)}
.btn-ghost{background:var(--surface);border-color:var(--line);color:var(--primary)}
.btn-ghost:hover{background:var(--surface-2);border-color:#c2d2f4;transform:translateY(-1px)}
.btn-outline{background:transparent;border-color:var(--primary);color:var(--primary)}
.btn-outline:hover{background:rgba(30,78,216,.07);color:var(--primary-strong)}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{background:#F2F6FF;color:var(--ink)}
.btn[disabled]{opacity:.6;cursor:not-allowed;transform:none}

/* ---------- 移动端抽屉 ---------- */
.drawer{
  position:fixed;inset:0;z-index:200;background:var(--surface);
  padding:84px 20px 108px;overflow-y:auto;
  opacity:0;visibility:hidden;transform:translateY(-10px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease;
}
.drawer.is-open{opacity:1;visibility:visible;transform:none}
.drawer h5{margin:22px 0 10px;font-size:12px;font-weight:600;letter-spacing:.16em;color:var(--muted);text-transform:uppercase}
.drawer a{
  display:block;padding:13px 4px;font-size:16px;font-weight:600;color:var(--ink);
  border-bottom:1px solid var(--line);
}
.drawer a:hover{color:var(--primary)}
.drawer-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:210;padding:14px 20px;
  background:linear-gradient(180deg,rgba(255,255,255,0) 0%,#fff 40%);
}
.drawer-bar .btn{width:100%}

/* ---------- 页面主体 ---------- */
main{padding-top:108px;padding-bottom:8px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:16px}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{
  content:"";width:6px;height:6px;border-top:1.5px solid #b7c2d6;border-right:1.5px solid #b7c2d6;
  transform:rotate(45deg);display:inline-block;
}
.breadcrumb a{color:var(--body);font-weight:600}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb [aria-current]{color:var(--ink);font-weight:700}

.page-head{padding-bottom:56px}
.page-head__grid{
  display:grid;grid-template-columns:minmax(0,1.7fr) minmax(0,1fr);
  gap:36px;align-items:start;
}
.page-head h1{font-size:clamp(30px,4.4vw,44px);font-weight:800;letter-spacing:.005em}
.page-head h1 .hl{color:var(--primary)}
.page-head__lead{margin-top:16px;font-size:17px;color:var(--body);max-width:620px}
.page-head__meta{margin-top:22px;display:flex;flex-wrap:wrap;gap:10px}

.pill{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:999px;
  background:rgba(30,78,216,.08);color:var(--primary);font-size:13px;font-weight:600;
}
.pill--mint{background:rgba(18,185,129,.12);color:#0E8C62}
.pill--gray{background:var(--surface-2);color:var(--muted)}

.quick-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);padding:24px;
}
.quick-card h3{font-size:17px;font-weight:700}
.quick-card__list{margin-top:16px;display:flex;flex-direction:column;gap:12px}
.quick-card__row{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:14px}
.quick-card__row span:first-child{color:var(--muted)}
.quick-card__row span:last-child{color:var(--ink);font-weight:600}
.quick-card .btn{width:100%;margin-top:20px}
.quick-card__note{margin-top:12px;font-size:13px;color:var(--muted)}

/* ---------- 板块 ---------- */
.section{padding:48px 0}
.section--alt{background:var(--surface-2)}
.section-head{max-width:720px;margin-bottom:32px}
.section-head h2{
  position:relative;padding-left:16px;font-size:clamp(23px,3vw,30px);font-weight:700;
}
.section-head h2::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:4px;border-radius:3px;background:var(--primary);
}
.section-head p{margin-top:12px;font-size:16px;color:var(--body)}

.split{display:grid;grid-template-columns:minmax(0,1fr) 296px;gap:32px;align-items:start}
.card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}

.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-card);overflow:hidden;display:flex;flex-direction:column;
  transition:transform .22s ease,box-shadow .22s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.card__thumb{width:100%;aspect-ratio:16/10;object-fit:cover;background:var(--surface-2)}
.card__body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.card__body h3{font-size:18px;font-weight:600}
.card__body p{font-size:15px;line-height:1.7;color:var(--body)}
.card__foot{margin-top:auto;padding-top:8px;font-size:13px;color:var(--muted);display:flex;align-items:center;gap:8px}

.side-card{
  position:sticky;top:96px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-card);padding:22px;
}
.side-card h3{font-size:16px;font-weight:700}
.side-card h4{margin-top:22px;font-size:13px;font-weight:600;letter-spacing:.1em;color:var(--muted)}
.chip-group{margin-top:12px;display:flex;flex-wrap:wrap;gap:8px}
.chip{
  display:inline-flex;align-items:center;height:34px;padding:0 14px;border-radius:999px;
  border:1px solid var(--line);background:var(--surface);color:var(--body);
  font-size:14px;font-weight:600;cursor:pointer;transition:.18s ease;
}
.chip:hover{border-color:#c2d2f4;color:var(--primary)}
.chip.is-active{background:rgba(30,78,216,.08);border-color:rgba(30,78,216,.35);color:var(--primary)}
.side-list{margin-top:14px;display:flex;flex-direction:column;gap:10px}
.side-list li{display:flex;align-items:flex-start;gap:8px;font-size:14px;color:var(--body)}
.side-list li::before{
  content:"";flex:0 0 auto;width:6px;height:6px;margin-top:9px;border-radius:50%;background:var(--accent);
}

/* ---------- 图文宽块 ---------- */
.feature{
  display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);
  gap:40px;align-items:center;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);padding:28px;
}
.feature__media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--radius);background:var(--surface-2);
}
.feature__body h3{font-size:22px;font-weight:700}
.feature__body p{margin-top:14px;font-size:15.5px;color:var(--body)}
.feature__list{margin-top:18px;display:flex;flex-direction:column;gap:12px}
.feature__list li{display:flex;gap:10px;font-size:15px;color:var(--body)}
.feature__list li b{color:var(--ink);font-weight:600}
.check{
  flex:0 0 auto;width:20px;height:20px;border-radius:50%;background:rgba(18,185,129,.14);
  display:grid;place-items:center;margin-top:3px;
}
.check::after{
  content:"";width:6px;height:10px;border-right:2px solid var(--mint);border-bottom:2px solid var(--mint);
  transform:rotate(45deg) translate(-1px,-1px);
}

/* ---------- FAQ ---------- */
.faq{display:flex;flex-direction:column;gap:12px;max-width:900px}
.faq details{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:background .2s ease;
}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:16px 22px;font-size:16px;font-weight:600;color:var(--ink);
  cursor:pointer;list-style:none;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"";width:14px;height:14px;flex:0 0 auto;border-radius:2px;
  background:
    linear-gradient(var(--primary),var(--primary)) center/14px 2px no-repeat,
    linear-gradient(var(--primary),var(--primary)) center/2px 14px no-repeat;
  transition:transform .2s ease;
}
.faq details[open]{background:var(--surface-2)}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq__answer{padding:0 22px 20px;font-size:15px;color:var(--body)}

/* ---------- CTA 深色条 ---------- */
.cta-band{
  background:var(--ink-deep);border-radius:var(--radius-lg);padding:44px;
  display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);
  gap:36px;align-items:center;
}
.cta-band h2{color:#fff;font-size:clamp(22px,2.8vw,30px);font-weight:700}
.cta-band p{margin-top:14px;color:#B9C6DF;font-size:15.5px}
.cta-band__meta{margin-top:22px;display:flex;flex-wrap:wrap;gap:10px}
.tag-soft{
  display:inline-flex;align-items:center;height:30px;padding:0 12px;border-radius:999px;
  background:rgba(255,255,255,.10);color:#DDE6F7;font-size:13px;font-weight:600;
}
.cta-band__actions{display:flex;flex-direction:column;gap:12px}
.cta-band__actions .btn{width:100%}

/* ---------- 页脚 ---------- */
.footer{background:var(--ink-deep);color:#C0CCE3;margin-top:88px;padding:64px 0 26px}
.footer .brand-text strong{color:#fff}
.footer .brand-text em{color:#8FA1C0}
.footer .brand-mark{background:var(--accent)}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px}
.footer p{margin-top:16px;font-size:14px;line-height:1.85;color:#A9B7D2;max-width:340px}
.footer h4{font-size:14px;font-weight:500;color:#7FE3C0;letter-spacing:.04em}
.footer ul{margin-top:16px;display:flex;flex-direction:column;gap:11px}
.footer ul a{
  position:relative;display:inline-block;padding-left:10px;font-size:14px;color:#C0CCE3;
}
.footer ul a::before{
  content:"";position:absolute;left:0;top:.45em;bottom:.45em;width:2px;border-radius:2px;
  background:transparent;transition:background .18s ease;
}
.footer ul a:hover{color:#fff}
.footer ul a:hover::before{background:var(--accent)}
.footer__bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.10);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:#8FA1C0;
}
.footer__bottom a{color:#C0CCE3}
.footer__bottom a:hover{color:#fff}

/* ---------- 移动端底部条 ---------- */
.mobile-bar{display:none}

/* ---------- 响应式 ---------- */
@media (max-width:1280px){
  .container{padding:0 24px}
}
@media (max-width:1024px){
  .dock-nav{display:none}
  .burger{display:flex}
  .dock{justify-content:space-between}
  .page-head__grid{grid-template-columns:1fr;gap:28px}
  .split{grid-template-columns:1fr;gap:28px}
  .side-card{position:static}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .feature{grid-template-columns:1fr;gap:26px;padding:24px}
  .cta-band{grid-template-columns:1fr;padding:34px}
  .footer__grid{grid-template-columns:1fr 1fr;gap:28px}
  .section{padding:40px 0}
}
@media (max-width:768px){
  .dock-wrap{top:10px;padding:0 12px}
  .dock{height:56px;border-radius:18px;padding:0 10px 0 14px}
  .dock-wrap.is-scrolled .dock{height:54px}
  .icon-btn,.dock-actions .btn{display:none}
  .brand-text em{display:none}
  main{padding-top:92px;padding-bottom:80px}
  .card-grid{grid-template-columns:1fr;gap:20px}
  .page-head{padding-bottom:40px}
  .page-head__lead{font-size:16px}
  .section{padding:32px 0}
  .feature__body h3{font-size:20px}
  .footer{padding:48px 0 22px;margin-top:64px}
  .footer__grid{grid-template-columns:1fr;gap:26px}
  .footer__bottom{flex-direction:column}
  .mobile-bar{
    display:block;position:fixed;left:0;right:0;bottom:0;z-index:110;
    padding:12px 16px 16px;background:rgba(255,255,255,.94);
    border-top:1px solid var(--line);backdrop-filter:blur(6px);
  }
  .mobile-bar .btn{width:100%}
}
@media (max-width:520px){
  .container{padding:0 20px}
  .page-head h1{font-size:28px}
  .section-head h2{font-size:22px}
  .quick-card,.side-card{padding:20px}
  .faq summary{padding:14px 16px;font-size:15px}
  .faq__answer{padding:0 16px 18px}
  .cta-band{padding:26px 20px;border-radius:16px}
  .btn-lg{height:46px;font-size:15px}
}

/* roulang page: article */
:root{
  --primary:#1E4ED8;
  --primary-strong:#173FB0;
  --accent:#FF6B1A;
  --accent-strong:#E85A0C;
  --mint:#12B981;
  --danger:#E5484D;
  --ink:#0D1526;
  --body:#4B5568;
  --muted:#8892A6;
  --bg:#F4F7FC;
  --surface:#FFFFFF;
  --surface-2:#EEF3FB;
  --line:#E2E8F4;
  --ink-deep:#0E1B33;
  --r-xl:20px;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --r-pill:999px;
  --sh-card:0 1px 2px rgba(16,36,84,.04), 0 12px 28px -12px rgba(16,36,84,.10);
  --sh-hover:0 18px 40px -16px rgba(16,36,84,.18);
  --sh-dock:0 10px 30px -12px rgba(16,36,84,.22);
  --w:1200px;
  --t:.2s cubic-bezier(.2,.7,.3,1);
}
*,*::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","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--body);
  background:var(--bg);
  letter-spacing:.01em;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5{margin:0;color:var(--ink);font-weight:700;letter-spacing:0;}
p{margin:0;}
a{color:var(--ink);text-decoration:none;transition:color var(--t);}
a:hover{color:var(--primary);}
img{display:block;max-width:100%;height:auto;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;font-size:inherit;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:8px;}
.container{width:100%;max-width:var(--w);margin:0 auto;padding:0 24px;}

/* ============ 浮动 Dock 导航 ============ */
.dock-wrap{
  position:fixed;top:16px;left:0;right:0;z-index:100;
  display:flex;justify-content:center;padding:0 16px;pointer-events:none;
}
.dock{
  pointer-events:auto;
  width:min(1120px,100%);
  height:64px;
  display:flex;align-items:center;gap:16px;
  padding:0 12px 0 16px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-xl);
  box-shadow:var(--sh-dock);
  transition:height .25s ease,box-shadow .25s ease;
}
.dock-wrap.is-scrolled .dock{
  height:60px;
  box-shadow:0 18px 44px -16px rgba(16,36,84,.30);
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand:hover{color:var(--ink);}
.brand-mark{
  width:38px;height:38px;border-radius:var(--r-md);
  background:var(--primary);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:800;letter-spacing:.04em;flex-shrink:0;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:15px;font-weight:800;color:var(--ink);}
.brand-text em{font-style:normal;font-size:11px;color:var(--muted);letter-spacing:.08em;}
.dock-nav{display:flex;align-items:center;gap:2px;margin-left:8px;}
.dock-nav a{
  position:relative;display:block;padding:11px 13px;
  font-size:15px;font-weight:500;color:var(--body);border-radius:var(--r-md);
  transition:background-color var(--t),color var(--t);
}
.dock-nav a:hover{color:var(--primary);background:var(--surface-2);}
.dock-nav a.is-active{color:var(--ink);font-weight:700;}
.dock-nav a.is-active::after{
  content:"";position:absolute;left:50%;bottom:3px;transform:translateX(-50%);
  width:20px;height:2px;border-radius:2px;background:var(--accent);
}
.dock-actions{margin-left:auto;display:flex;align-items:center;gap:10px;}
.icon-btn{
  width:40px;height:40px;border-radius:var(--r-md);
  border:1px solid var(--line);background:var(--surface);color:var(--body);
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  transition:color var(--t),border-color var(--t),background-color var(--t);
}
.icon-btn:hover{color:var(--primary);border-color:#C9D6F5;background:#F8FAFF;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 20px;border-radius:var(--r-md);border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  transition:transform var(--t),background-color var(--t),color var(--t),border-color var(--t),box-shadow var(--t);
}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 10px 22px -12px rgba(255,107,26,.85);}
.btn-accent:hover{background:var(--accent-strong);color:#fff;transform:translateY(-2px);}
.btn-accent:active{transform:translateY(1px);}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-strong);color:#fff;transform:translateY(-2px);}
.btn-primary:active{transform:translateY(1px);}
.btn-outline{background:var(--surface);border-color:var(--line);color:var(--primary);}
.btn-outline:hover{border-color:var(--primary);background:#F8FAFF;transform:translateY(-2px);}
.btn-outline:active{transform:translateY(1px);}
.btn-sm{padding:9px 16px;font-size:14px;border-radius:var(--r-sm);}
.btn:disabled,.btn[disabled]{opacity:.6;cursor:not-allowed;transform:none;}

/* ============ 汉堡与抽屉 ============ */
.burger{
  display:none;width:40px;height:40px;border-radius:var(--r-md);
  border:1px solid var(--line);background:var(--surface);cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.burger span{display:block;width:17px;height:2px;border-radius:2px;background:var(--ink);transition:transform var(--t),opacity var(--t);}
.burger.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.burger.is-open span:nth-child(2){opacity:0;}
.burger.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.drawer{
  position:fixed;inset:0;z-index:200;background:var(--surface);
  padding:22px 20px 96px;overflow-y:auto;
  transform:translateY(-102%);transition:transform .3s cubic-bezier(.3,.8,.3,1);
}
.drawer.is-open{transform:translateY(0);}
.drawer__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px;}
.drawer__close{
  width:40px;height:40px;border-radius:var(--r-md);border:1px solid var(--line);
  background:var(--surface);color:var(--ink);font-size:20px;line-height:1;cursor:pointer;
}
.drawer__label{font-size:12px;font-weight:600;letter-spacing:.14em;color:var(--muted);margin-bottom:10px;}
.drawer__list{display:flex;flex-direction:column;}
.drawer__list a{
  display:block;padding:15px 4px;font-size:17px;font-weight:600;color:var(--ink);
  border-bottom:1px solid var(--line);
}
.drawer__list a:hover{color:var(--primary);}
.drawer__cta{position:fixed;left:20px;right:20px;bottom:22px;width:auto;}

/* ============ 页面主体 ============ */
.page{padding:112px 0 0;}
.crumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:13px;color:var(--muted);margin-bottom:22px;
}
.crumb a{font-size:13px;color:var(--body);font-weight:500;}
.crumb a:hover{color:var(--primary);}
.crumb strong{color:var(--ink);font-weight:700;}
.crumb-sep{
  width:7px;height:7px;border-right:1.5px solid #C3CDE2;border-bottom:1.5px solid #C3CDE2;
  transform:rotate(-45deg);flex-shrink:0;
}
.article-shell{
  display:grid;grid-template-columns:minmax(0,760px) 240px;
  gap:56px;justify-content:center;align-items:start;
}
.art-head{margin-bottom:26px;}
.art-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px;}
.tag{
  display:inline-block;padding:4px 12px;border-radius:var(--r-pill);
  background:#EAF0FF;color:var(--primary);font-size:12px;font-weight:600;
}
.art-head h1{
  font-size:clamp(26px,3.4vw,36px);font-weight:800;line-height:1.35;
  color:var(--ink);margin-bottom:16px;
}
.art-meta{
  display:flex;align-items:center;flex-wrap:wrap;gap:12px;
  font-size:13px;color:var(--muted);
  padding-bottom:18px;border-bottom:1px solid var(--line);
}
.art-meta .dot{width:3px;height:3px;border-radius:50%;background:#C7D0E2;}
.art-share{margin-left:auto;display:flex;align-items:center;gap:8px;}
.art-share > span{font-size:13px;color:var(--muted);}
.share-btn{
  padding:6px 12px;border-radius:var(--r-pill);border:1px solid var(--line);
  background:var(--surface);color:var(--body);font-size:12px;cursor:pointer;
  transition:color var(--t),border-color var(--t),background-color var(--t);
}
.share-btn:hover{color:var(--primary);border-color:#C9D6F5;background:#F8FAFF;}

/* ============ 正文 ============ */
.article-body{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-xl);
  box-shadow:var(--sh-card);
  padding:44px 52px 48px;
}
.article-body > *:first-child{margin-top:0;}
.article-body h2{
  position:relative;
  font-size:24px;line-height:1.45;font-weight:700;
  margin:42px 0 16px;padding-left:15px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:7px;bottom:7px;width:4px;
  border-radius:4px;background:var(--primary);
}
.article-body h3{font-size:19px;line-height:1.5;margin:32px 0 12px;}
.article-body h4{font-size:16px;margin:24px 0 10px;}
.article-body p{margin:0 0 18px;font-size:16px;line-height:1.9;color:var(--body);}
.article-body a{color:var(--primary);border-bottom:2px solid rgba(30,78,216,.22);}
.article-body a:hover{color:var(--primary-strong);border-bottom-color:var(--primary);}
.article-body strong{color:var(--ink);font-weight:700;}
.article-body ul,.article-body ol{margin:0 0 22px;}
.article-body ul li{position:relative;padding-left:22px;margin-bottom:10px;font-size:16px;line-height:1.85;}
.article-body ul li::before{
  content:"";position:absolute;left:4px;top:.72em;width:6px;height:6px;
  border-radius:50%;background:var(--primary);
}
.article-body ol{counter-reset:cms-li;}
.article-body ol li{position:relative;padding-left:28px;margin-bottom:10px;font-size:16px;line-height:1.85;counter-increment:cms-li;}
.article-body ol li::before{
  content:counter(cms-li);position:absolute;left:0;top:1px;
  width:20px;height:20px;border-radius:6px;background:var(--surface-2);
  color:var(--primary);font-size:12px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.article-body blockquote{
  margin:0 0 22px;padding:18px 22px;
  background:var(--surface-2);
  border-left:3px solid var(--accent);
  border-radius:0 var(--r-md) var(--r-md) 0;
  color:var(--ink);font-size:15px;line-height:1.85;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body figure{margin:26px 0;}
.article-body img{border-radius:var(--r-md);width:100%;}
.article-body figcaption{text-align:center;font-size:13px;color:var(--muted);margin-top:10px;}
.article-body pre{
  background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r-md);
  padding:16px 18px;overflow:auto;margin:0 0 22px;
  font-size:14px;line-height:1.7;color:var(--ink);
}
.article-body code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px;}
.article-body p code,.article-body li code{
  background:var(--surface-2);color:var(--primary-strong);
  padding:2px 6px;border-radius:6px;
}
.article-body table{width:100%;border-collapse:collapse;margin:0 0 22px;font-size:15px;}
.article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;}
.article-body th{background:var(--surface-2);color:var(--ink);font-weight:600;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0;}

/* ============ 目录 ============ */
.toc{
  position:sticky;top:104px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-card);padding:20px 16px;
}
.toc h4{font-size:12px;letter-spacing:.14em;color:var(--muted);font-weight:600;margin-bottom:12px;padding-left:10px;}
.toc ol{display:flex;flex-direction:column;gap:2px;}
.toc a{
  position:relative;display:block;padding:8px 10px;border-radius:8px;
  font-size:14px;line-height:1.5;color:var(--body);
  transition:background-color var(--t),color var(--t);
}
.toc a:hover{background:var(--surface-2);color:var(--primary);}
.toc a.is-current{color:var(--ink);font-weight:600;}
.toc a.is-current::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:2px;
  border-radius:2px;background:var(--accent);
}

/* ============ 空态 ============ */
.empty-state{
  min-height:240px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;gap:12px;padding:30px 10px;
}
.empty-state__icon{
  width:54px;height:54px;border-radius:var(--r-lg);background:var(--surface-2);
  color:var(--primary);font-weight:800;font-size:15px;
  display:flex;align-items:center;justify-content:center;margin-bottom:4px;
}
.empty-state h2{font-size:20px;}
.empty-state p{font-size:15px;color:var(--body);max-width:420px;line-height:1.8;}
.empty-state .btn{margin-top:8px;}

/* ============ 文章尾部 ============ */
.art-after{margin-top:34px;}
.art-after__tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:22px;}
.art-after__tags .tag{background:var(--surface);border:1px solid var(--line);color:var(--body);padding:6px 14px;font-size:13px;}
.art-after__tags .tag:hover{border-color:var(--primary);color:var(--primary);}
.art-nav{display:flex;flex-wrap:wrap;gap:12px;}

/* ============ 相关推荐 ============ */
.related{margin-top:56px;}
.related h2{font-size:22px;margin-bottom:6px;}
.related .sub{font-size:14px;color:var(--muted);margin-bottom:22px;}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-card);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:#D3DDF2;}
.card__thumb{aspect-ratio:16/10;background:var(--surface-2);overflow:hidden;}
.card__thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.card:hover .card__thumb img{transform:scale(1.04);}
.card__body{padding:16px 18px 20px;display:flex;flex-direction:column;gap:8px;flex:1;}
.card__tag{
  align-self:flex-start;padding:3px 10px;border-radius:var(--r-pill);
  background:#EAF0FF;color:var(--primary);font-size:12px;font-weight:600;
}
.card h3{font-size:16px;line-height:1.5;font-weight:700;}
.card:hover h3{color:var(--primary);}
.card p{font-size:14px;line-height:1.75;color:var(--body);}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:24px;bottom:28px;z-index:80;
  width:46px;height:46px;border-radius:50%;
  border:1px solid var(--line);background:var(--surface);color:var(--primary);
  box-shadow:var(--sh-card);cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity var(--t),transform var(--t),visibility var(--t),background-color var(--t),color var(--t);
}
.to-top.is-on{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--primary);color:#fff;border-color:var(--primary);}

/* ============ 移动端底部条 ============ */
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:90;display:none;
  gap:10px;padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  background:var(--surface);border-top:1px solid var(--line);
  box-shadow:0 -8px 24px -14px rgba(16,36,84,.22);
}
.mobile-bar .btn{flex:1;}

/* ============ 页脚 ============ */
.footer{background:var(--ink-deep);color:#C7D2E8;margin-top:96px;padding-top:64px;}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px;padding-bottom:48px;}
.footer h4{color:var(--mint);font-size:14px;font-weight:500;letter-spacing:.06em;margin-bottom:16px;}
.footer p{font-size:14px;line-height:1.85;color:#93A2C0;}
.footer ul{display:flex;flex-direction:column;gap:11px;}
.footer a{position:relative;display:inline-block;font-size:14px;color:#C7D2E8;transition:color var(--t),padding-left var(--t);}
.footer a:hover{color:#fff;padding-left:12px;}
.footer a:hover::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:14px;border-radius:2px;background:var(--accent);
}
.footer .brand{margin-bottom:16px;}
.footer .brand-text strong{color:#fff;}
.footer .brand-text em{color:#8FA0C0;}
.footer__bottom{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;
  padding:20px 0 28px;border-top:1px solid rgba(255,255,255,.09);
  font-size:13px;color:#7C8BAA;
}
.footer__bottom a{font-size:13px;color:#A8B7D4;}
.footer__bottom .sep{color:#4A5A7C;margin:0 6px;}

/* ============ 响应式 ============ */
@media (max-width:1200px){
  .article-shell{grid-template-columns:minmax(0,1fr);max-width:760px;margin:0 auto;gap:0;}
  .toc{display:none;}
}
@media (max-width:1024px){
  .page{padding-top:100px;}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:820px){
  .dock-wrap{top:10px;padding:0 10px;}
  .dock{height:56px;padding:0 8px 0 12px;gap:10px;border-radius:var(--r-lg);}
  .dock-wrap.is-scrolled .dock{height:52px;}
  .dock-nav{display:none;}
  .dock-actions .icon-btn,.dock-actions .btn-accent{display:none;}
  .burger{display:flex;}
}
@media (max-width:768px){
  .container{padding:0 20px;}
  .page{padding-top:84px;padding-bottom:0;}
  .article-body{padding:26px 20px 30px;border-radius:var(--r-lg);}
  .article-body h2{font-size:21px;margin:32px 0 14px;}
  .article-body h3{font-size:18px;}
  .article-body p,.article-body ul li,.article-body ol li{font-size:15.5px;line-height:1.85;}
  .related-grid{grid-template-columns:1fr;}
  .related{margin-top:44px;}
  .art-head h1{font-size:24px;}
  .art-share{margin-left:0;width:100%;}
  .mobile-bar{display:flex;}
  body{padding-bottom:74px;}
  .to-top{right:16px;bottom:88px;}
  .footer{margin-top:64px;padding-top:48px;}
  .footer__grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px;}
  .footer__bottom{flex-direction:column;gap:8px;}
}
@media (max-width:480px){
  .container{padding:0 16px;}
  .brand-text em{display:none;}
  .article-body{padding:22px 16px 26px;}
  .art-after__tags{gap:8px;}
}

/* roulang page: category2 */
/* ===== 设计变量 ===== */
:root{
  --primary:#1E4ED8;
  --primary-strong:#173FB0;
  --accent:#FF6B1A;
  --accent-strong:#E85A0C;
  --mint:#12B981;
  --danger:#E5484D;
  --ink:#0D1526;
  --ink-deep:#0E1B33;
  --body:#4B5568;
  --muted:#8892A6;
  --bg:#F4F7FC;
  --surface:#FFFFFF;
  --surface-2:#EEF3FB;
  --line:#E2E8F4;
  --r-lg:20px;
  --r-md:16px;
  --r-sm:12px;
  --shadow-card:0 1px 2px rgba(16,36,84,.04), 0 12px 28px -12px rgba(16,36,84,.10);
  --shadow-hover:0 18px 40px -16px rgba(16,36,84,.18);
  --shadow-dock:0 10px 30px -12px rgba(16,36,84,.22);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}

/* ===== reset / base ===== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--body);
  background:var(--bg);
  padding-top:96px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--ink);text-decoration:none;transition:color .18s ease,border-color .18s ease;}
a:hover{color:var(--primary);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.3;}
p{margin:0;}
button,input{font-family:inherit;font-size:inherit;}
button{cursor:pointer;border:0;background:none;color:inherit;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}
.num{font-variant-numeric:tabular-nums;}

/* ===== 容器 ===== */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section--tight{padding-top:64px;}
.section--alt{background:var(--surface-2);}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head h2{font-size:clamp(24px,3vw,32px);font-weight:700;margin-bottom:12px;}
.section-head h2::before{
  content:"";display:block;width:44px;height:4px;border-radius:4px;
  background:var(--primary);margin-bottom:16px;
}
.section-head p{font-size:16px;color:var(--body);}

/* ===== 浮动 Dock 导航 ===== */
.dock-wrap{
  position:fixed;top:16px;left:0;right:0;z-index:120;
  display:flex;justify-content:center;padding:0 16px;pointer-events:none;
}
.dock{
  pointer-events:auto;
  width:min(1120px,100%);
  height:64px;
  display:flex;align-items:center;gap:14px;
  padding:0 14px 0 16px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:999px;
  box-shadow:var(--shadow-dock);
  transition:height .24s ease,box-shadow .24s ease;
}
.dock-wrap.is-scrolled .dock{height:60px;box-shadow:0 14px 34px -12px rgba(16,36,84,.30);}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand:hover{color:var(--ink);}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;border-radius:11px;
  background:var(--primary);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:14px;letter-spacing:.02em;
  position:relative;
}
.brand-mark::after{
  content:"";position:absolute;right:-3px;bottom:-3px;
  width:10px;height:10px;border-radius:50%;
  background:var(--accent);border:2px solid #fff;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:15px;font-weight:800;color:var(--ink);}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--muted);letter-spacing:.04em;}
.dock-nav{display:flex;align-items:center;gap:2px;margin-left:auto;flex-wrap:wrap;}
.dock-nav a{
  position:relative;display:inline-block;
  padding:8px 12px;border-radius:999px;
  font-size:14.5px;color:var(--body);
}
.dock-nav a:hover{color:var(--primary);background:var(--surface-2);}
.dock-nav a.is-active{color:var(--ink);font-weight:700;}
.dock-nav a.is-active::after{
  content:"";position:absolute;left:50%;bottom:0;
  transform:translateX(-50%);
  width:22px;height:2px;border-radius:2px;background:var(--accent);
}
.dock-actions{display:flex;align-items:center;gap:8px;flex-shrink:0;}
.icon-btn{
  width:38px;height:38px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  color:var(--body);border:1px solid transparent;
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.icon-btn:hover{background:var(--surface-2);color:var(--primary);border-color:var(--line);}
.burger{display:none;width:40px;height:40px;border-radius:12px;flex-direction:column;justify-content:center;align-items:center;gap:5px;}
.burger span{display:block;width:20px;height:2px;border-radius:2px;background:var(--ink);}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:0 22px;height:48px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .16s ease,box-shadow .18s ease;
  white-space:nowrap;
}
.btn:active{transform:translateY(1px);}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 10px 22px -12px rgba(255,107,26,.55);}
.btn-accent:hover{background:var(--accent-strong);color:#fff;}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-strong);color:#fff;}
.btn-ghost{background:transparent;color:var(--primary);border-color:rgba(30,78,216,.35);}
.btn-ghost:hover{background:rgba(30,78,216,.06);color:var(--primary-strong);border-color:var(--primary);}
.btn-light{background:var(--surface);color:var(--primary);border-color:var(--line);box-shadow:var(--shadow-card);}
.btn-light:hover{color:var(--primary-strong);border-color:rgba(30,78,216,.4);}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:10px;}
.btn-block{width:100%;}

/* ===== 面包屑 ===== */
.crumb{display:flex;align-items:center;flex-wrap:wrap;gap:0;font-size:13px;color:var(--muted);margin-bottom:20px;}
.crumb li{display:flex;align-items:center;}
.crumb li+li::before{content:"›";margin:0 10px;color:#B9C3D6;font-size:14px;}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--primary);}
.crumb li[aria-current]{color:var(--ink);font-weight:700;}

/* ===== 分类页首屏 ===== */
.cat-hero{
  position:relative;overflow:hidden;
  padding:52px 0 64px;
  background:linear-gradient(180deg,var(--surface-2) 0%,var(--surface) 100%);
}
.cat-hero__bg{
  position:absolute;right:-4%;top:-8%;width:48%;height:116%;
  background:url('/assets/images/backpic/back-2.webp') center right/cover no-repeat;
  opacity:.12;border-radius:28px;pointer-events:none;
}
.cat-hero__grid{
  position:relative;z-index:1;
  display:grid;grid-template-columns:minmax(0,1fr) 344px;
  gap:48px;align-items:start;
}
.cat-hero h1{
  font-size:clamp(30px,4.6vw,44px);
  font-weight:800;letter-spacing:0;margin-bottom:18px;
}
.cat-hero h1 .hl{color:var(--primary);}
.cat-hero__lead{font-size:17px;max-width:640px;margin-bottom:26px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;}
.tag{
  display:inline-flex;align-items:center;
  padding:6px 14px;border-radius:999px;
  font-size:13px;font-weight:600;
  background:rgba(30,78,216,.08);color:var(--primary);
}
.tag--mint{background:rgba(18,185,129,.12);color:#0E8F65;}
.tag--accent{background:rgba(255,107,26,.12);color:var(--accent-strong);}

/* 下载小卡 */
.dl-card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:26px;box-shadow:var(--shadow-card);
}
.dl-card h2{font-size:18px;margin-bottom:10px;}
.dl-card p{font-size:14px;color:var(--body);margin-bottom:18px;}
.dl-card .meta{
  display:flex;flex-wrap:wrap;gap:8px 14px;
  font-size:13px;color:var(--muted);
  padding-top:16px;margin-top:18px;border-top:1px dashed var(--line);
}
.dl-card .btn+.btn{margin-top:10px;}

/* ===== 快捷跳转 ===== */
.quicknav{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  padding:18px 22px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--shadow-card);margin-top:-28px;position:relative;z-index:2;
}
.quicknav span{font-size:13px;color:var(--muted);margin-right:4px;}
.quicknav a{
  padding:7px 14px;border-radius:999px;background:var(--surface-2);
  font-size:13.5px;font-weight:600;color:var(--ink);
}
.quicknav a:hover{background:rgba(30,78,216,.10);color:var(--primary);}

/* ===== 横向交替行 ===== */
.rowlist{display:grid;gap:56px;}
.row-block{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:48px;align-items:center;
}
.row-block--reverse .row-media{order:2;}
.row-block--reverse .row-copy{order:1;}
.row-media{
  position:relative;border-radius:var(--r-md);overflow:hidden;
  background:var(--surface-2);border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  aspect-ratio:16/10;
}
.row-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.row-block:hover .row-media img{transform:scale(1.03);}
.row-no{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;font-weight:800;letter-spacing:.14em;
  color:var(--accent);margin-bottom:14px;
}
.row-no::after{content:"";width:32px;height:1px;background:rgba(255,107,26,.45);}
.row-copy h3{font-size:22px;margin-bottom:14px;}
.row-copy>p{font-size:15.5px;margin-bottom:18px;}
.ticks{display:grid;gap:10px;margin-bottom:20px;}
.ticks li{position:relative;padding-left:24px;font-size:15px;line-height:1.7;}
.ticks li::before{
  content:"";position:absolute;left:2px;top:9px;
  width:9px;height:9px;border-radius:50%;
  background:rgba(18,185,129,.18);
  box-shadow:inset 0 0 0 2px var(--mint);
}
.link-inline{
  display:inline-block;font-size:14.5px;font-weight:600;color:var(--primary);
  border-bottom:2px solid rgba(30,78,216,.18);padding-bottom:1px;
}
.link-inline:hover{color:var(--primary-strong);border-bottom-color:var(--primary);}

/* ===== 操作路径对照 ===== */
.paths{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.path-card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);padding:28px;box-shadow:var(--shadow-card);
  transition:transform .2s ease,box-shadow .2s ease;
}
.path-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);}
.path-card h3{font-size:19px;margin-bottom:6px;}
.path-card .path-tip{font-size:13.5px;color:var(--muted);margin-bottom:20px;}
.path-list{display:grid;gap:2px;}
.path-list .pl-row{
  display:grid;grid-template-columns:96px minmax(0,1fr);
  gap:16px;align-items:start;
  padding:14px 0;border-top:1px solid var(--line);
}
.path-list .pl-row:first-child{border-top:0;padding-top:0;}
.path-list dt{font-size:13.5px;font-weight:700;color:var(--ink);}
.path-list dd{margin:0;font-size:14.5px;color:var(--body);}
.step-pill{
  display:inline-flex;align-items:center;
  margin:2px 6px 2px 0;padding:4px 11px;border-radius:999px;
  background:var(--surface-2);color:var(--ink);
  font-size:12.5px;font-weight:600;
}
.step-pill--accent{background:rgba(255,107,26,.12);color:var(--accent-strong);}

/* ===== 支持情况定义列表 ===== */
.spec-list{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-card);}
.spec-row{
  display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr) 120px;
  gap:18px;align-items:center;
  padding:18px 26px;border-top:1px solid var(--line);
}
.spec-row:first-child{border-top:0;}
.spec-row dt{font-size:15.5px;font-weight:600;color:var(--ink);}
.spec-row dd{margin:0;font-size:13.5px;color:var(--muted);}
.badge{
  display:inline-flex;align-items:center;justify-content:center;
  padding:5px 13px;border-radius:999px;
  font-size:12.5px;font-weight:700;white-space:nowrap;
}
.badge--ok{background:rgba(18,185,129,.13);color:#0E8F65;}
.badge--mid{background:var(--surface-2);color:var(--body);}
.badge--off{background:#F1F3F8;color:#A3ABBC;text-decoration:line-through;}

/* ===== FAQ ===== */
.faq{border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);overflow:hidden;box-shadow:var(--shadow-card);}
.faq details{border-top:1px solid var(--line);}
.faq details:first-child{border-top:0;}
.faq summary{
  list-style:none;cursor:pointer;
  min-height:56px;padding:16px 26px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  font-size:16px;font-weight:600;color:var(--ink);
  transition:background .2s ease;
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{
  content:"+";font-size:22px;font-weight:400;color:var(--primary);
  line-height:1;transition:transform .2s ease;
}
.faq details[open] summary{background:var(--surface-2);}
.faq details[open] summary::after{transform:rotate(45deg);}
.faq .faq-body{padding:4px 26px 22px;font-size:15px;color:var(--body);max-width:900px;}

/* ===== 下载 CTA 条 ===== */
.cta-band{
  background:var(--ink-deep);border-radius:var(--r-lg);
  padding:48px;color:#fff;
  display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);
  gap:40px;align-items:center;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-60px;
  width:260px;height:260px;border-radius:50%;
  background:rgba(30,78,216,.35);filter:blur(30px);pointer-events:none;
}
.cta-band h2{color:#fff;font-size:clamp(22px,2.8vw,30px);margin-bottom:12px;}
.cta-band p{color:#B7C2D8;font-size:15.5px;max-width:560px;}
.cta-band .btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.cta-side{position:relative;z-index:1;display:grid;gap:14px;}
.cta-side .meta-line{display:flex;flex-wrap:wrap;gap:8px 16px;font-size:13px;color:#93A1BC;}
.qr-box{
  display:flex;align-items:center;gap:16px;
  padding:16px;border-radius:var(--r-md);
  background:rgba(255,255,255,.06);border:1px dashed rgba(255,255,255,.25);
}
.qr-code{
  width:72px;height:72px;border-radius:10px;flex:0 0 72px;
  background:
    repeating-linear-gradient(90deg,rgba(255,255,255,.85) 0 6px,rgba(255,255,255,.15) 6px 12px),
    repeating-linear-gradient(0deg,rgba(255,255,255,.25) 0 6px,rgba(255,255,255,0) 6px 12px),
    #fff;
}
.qr-box span{font-size:13px;color:#C3CDE0;line-height:1.6;}

/* ===== 页脚 ===== */
.footer{background:var(--ink-deep);color:#B7C2D8;margin-top:96px;}
.footer a{color:#B7C2D8;}
.footer__grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;padding:64px 0 40px;
}
.footer__grid h4{
  color:var(--mint);font-size:14px;font-weight:500;
  letter-spacing:.06em;margin-bottom:18px;
}
.footer__grid p{font-size:14px;line-height:1.75;margin-top:18px;}
.footer__grid ul{display:grid;gap:10px;}
.footer__grid ul a{
  position:relative;display:inline-block;font-size:14px;padding-left:0;
  transition:color .18s ease,padding .18s ease;
}
.footer__grid ul a::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:14px;border-radius:2px;background:var(--accent);
  opacity:0;transition:opacity .18s ease;
}
.footer__grid ul a:hover{color:#fff;padding-left:12px;}
.footer__grid ul a:hover::before{opacity:1;}
.footer .brand-text strong{color:#fff;}
.footer .brand-text em{color:#8892A6;}
.footer__bottom{
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;
  padding:22px 0 32px;border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;color:#8892A6;
}
.footer__bottom a{color:#B7C2D8;}
.footer__bottom a:hover{color:#fff;}

/* ===== 移动抽屉 ===== */
.drawer{
  position:fixed;inset:0;z-index:200;background:var(--surface);
  display:flex;flex-direction:column;padding:20px 20px 24px;
  overflow-y:auto;
}
.drawer[hidden]{display:none;}
.drawer__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;}
.drawer__close{
  width:40px;height:40px;border-radius:12px;background:var(--surface-2);
  font-size:20px;line-height:1;color:var(--ink);
}
.drawer__title{font-size:12.5px;font-weight:700;letter-spacing:.14em;color:var(--muted);margin:18px 0 6px;}
.drawer__nav{display:grid;gap:2px;}
.drawer__nav a{
  padding:14px 12px;border-radius:12px;font-size:16px;font-weight:600;color:var(--ink);
  border-bottom:1px solid var(--line);
}
.drawer__nav a.is-active{background:var(--surface-2);color:var(--primary);}
.drawer__cta{margin-top:auto;padding-top:20px;position:sticky;bottom:0;background:var(--surface);}

/* ===== 响应式 ===== */
@media (max-width:1280px){
  .container{max-width:1120px;}
}
@media (max-width:1023px){
  body{padding-top:88px;}
  .dock-nav,.icon-btn{display:none;}
  .burger{display:flex;}
  .dock{height:58px;padding:0 10px 0 14px;gap:10px;}
  .dock-actions{margin-left:auto;}
  .cat-hero__grid{grid-template-columns:minmax(0,1fr);gap:32px;}
  .cat-hero__bg{width:70%;opacity:.10;}
  .row-block{grid-template-columns:minmax(0,1fr);gap:24px;}
  .row-block--reverse .row-media{order:0;}
  .row-block--reverse .row-copy{order:0;}
  .paths{grid-template-columns:minmax(0,1fr);}
  .cta-band{grid-template-columns:minmax(0,1fr);padding:36px;}
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;padding:48px 0 32px;}
  .section{padding:72px 0;}
  .rowlist{gap:44px;}
}
@media (max-width:767px){
  body{padding-top:78px;font-size:15.5px;}
  .container{padding:0 20px;}
  .section{padding:56px 0;}
  .section-head{margin-bottom:28px;}
  .cat-hero{padding:36px 0 44px;}
  .cat-hero__bg{display:none;}
  .cat-hero h1{font-size:clamp(26px,7vw,34px);}
  .cat-hero__lead{font-size:16px;}
  .quicknav{margin-top:20px;padding:14px 16px;}
  .row-copy h3{font-size:19px;}
  .spec-row{grid-template-columns:minmax(0,1fr);gap:8px;padding:16px 18px;}
  .spec-row dd{order:3;}
  .badge{justify-self:start;}
  .faq summary{padding:15px 18px;font-size:15.5px;}
  .faq .faq-body{padding:2px 18px 20px;}
  .cta-band{padding:28px 22px;border-radius:var(--r-md);}
  .cta-band .btns .btn{width:100%;}
  .footer{margin-top:64px;}
  .footer__grid{grid-template-columns:minmax(0,1fr);gap:28px;}
  .footer__bottom{flex-direction:column;align-items:flex-start;}
  .path-list .pl-row{grid-template-columns:minmax(0,1fr);gap:6px;}
}
@media (max-width:480px){
  .brand-text em{display:none;}
  .brand-text strong{font-size:14px;}
  .btn{height:46px;padding:0 18px;font-size:14.5px;}
  .dl-card{padding:20px;}
  .path-card{padding:20px;}
}

/* roulang page: category3 */
:root{
  --primary:#1E4ED8;
  --primary-strong:#173FB0;
  --accent:#FF6B1A;
  --accent-strong:#E85A0C;
  --mint:#12B981;
  --danger:#E5484D;
  --ink:#0D1526;
  --ink-deep:#0E1B33;
  --body:#4B5568;
  --muted:#8892A6;
  --bg:#F4F7FC;
  --surface:#FFFFFF;
  --surface-2:#EEF3FB;
  --line:#E2E8F4;
  --r-lg:20px;
  --r-md:16px;
  --r-sm:12px;
  --r-pill:999px;
  --sh-card:0 1px 2px rgba(16,36,84,.04), 0 12px 28px -12px rgba(16,36,84,.10);
  --sh-hover:0 18px 40px -16px rgba(16,36,84,.18);
  --sh-dock:0 10px 30px -12px rgba(16,36,84,.22);
  --w-container:1200px;
}

*,*::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","Noto Sans SC",Inter,system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--body);
  background:var(--bg);
  padding-top:96px;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--ink);text-decoration:none;transition:color .2s ease,border-color .2s ease;}
a:hover{color:var(--primary);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.3;}
p{margin:0;}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:var(--w-container);margin:0 auto;padding:0 24px;}
.num{font-variant-numeric:tabular-nums;font-family:Inter,"PingFang SC",system-ui,sans-serif;}

/* ---------- 浮动 Dock 导航 ---------- */
.dock-wrap{
  position:fixed;
  top:16px;
  left:50%;
  transform:translateX(-50%);
  width:min(1120px,calc(100% - 32px));
  z-index:60;
}
.dock{
  display:flex;
  align-items:center;
  gap:18px;
  height:64px;
  padding:0 12px 0 18px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-card);
  transition:height .25s ease,box-shadow .25s ease;
}
.dock-wrap.is-scrolled .dock{
  height:60px;
  box-shadow:var(--sh-dock);
}
.brand{display:flex;align-items:center;gap:10px;flex:none;}
.brand-mark{
  width:38px;height:38px;flex:none;
  display:grid;place-items:center;
  border-radius:12px;
  background:var(--primary);
  color:#fff;
  font-size:14px;font-weight:800;letter-spacing:.02em;
  font-family:Inter,system-ui,sans-serif;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:15px;font-weight:700;color:var(--ink);}
.brand-text em{font-style:normal;font-size:12px;color:var(--muted);}
.dock-nav{display:flex;align-items:center;gap:4px;margin-left:8px;flex:1;}
.dock-nav a{
  display:inline-block;
  position:relative;
  padding:8px 12px;
  font-size:15px;
  font-weight:500;
  color:var(--body);
  border-radius:10px;
  white-space:nowrap;
}
.dock-nav a:hover{color:var(--primary);background:var(--surface-2);}
.dock-nav a.is-active{color:var(--ink);font-weight:600;}
.dock-nav a.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--accent);border-radius:2px;
}
.dock-actions{display:flex;align-items:center;gap:10px;flex:none;}
.icon-btn{
  width:40px;height:40px;border-radius:var(--r-pill);
  display:grid;place-items:center;
  color:var(--body);border:1px solid var(--line);background:var(--surface);
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.icon-btn:hover{color:var(--primary);border-color:#C9D6F2;background:var(--surface-2);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:0 22px;height:48px;
  font-size:15px;font-weight:600;
  border-radius:var(--r-sm);
  border:1px solid transparent;
  transition:background .2s ease,color .2s ease,transform .18s ease,box-shadow .18s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn:active{transform:translateY(1px);}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 10px 22px -12px rgba(255,107,26,.75);}
.btn-accent:hover{background:var(--accent-strong);color:#fff;transform:translateY(-2px);box-shadow:0 16px 30px -14px rgba(232,90,12,.8);}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-strong);color:#fff;transform:translateY(-2px);}
.btn-ghost{background:var(--surface);color:var(--primary);border-color:#C9D6F2;}
.btn-ghost:hover{background:var(--surface-2);color:var(--primary-strong);border-color:var(--primary);transform:translateY(-2px);}
.btn-outline{background:transparent;color:#fff;border-color:rgba(255,255,255,.45);}
.btn-outline:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff;}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:10px;}
.btn-block{width:100%;}
.btn[disabled]{opacity:.6;cursor:not-allowed;transform:none;box-shadow:none;}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;
  font-size:12px;font-weight:600;line-height:1.6;
  border-radius:var(--r-pill);
  white-space:nowrap;
}
.badge-ok{background:rgba(18,185,129,.12);color:#0B8F63;}
.badge-rec{background:rgba(30,78,216,.10);color:var(--primary);}
.badge-min{background:var(--surface-2);color:var(--muted);}
.badge-line{background:#F1F3F8;color:#9AA4B6;text-decoration:line-through;}

/* ---------- 页面头部 ---------- */
.page-head{
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--line);
  background:var(--surface);
}
.page-head__bg{
  position:absolute;
  inset:0 0 0 auto;
  width:62%;
  background-image:url("/assets/images/backpic/back-3.png");
  background-size:cover;
  background-position:right center;
  opacity:.12;
  pointer-events:none;
}
.page-head__inner{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,1fr) 320px;
  gap:40px;
  align-items:start;
  padding:44px 0 52px;
}
.crumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:13px;color:var(--muted);margin-bottom:18px;
}
.crumb a{color:var(--ink);font-weight:600;}
.crumb a:hover{color:var(--primary);}
.crumb li{display:flex;align-items:center;gap:8px;}
.crumb li+li::before{
  content:"";width:6px;height:6px;
  border-right:1.5px solid var(--muted);border-bottom:1.5px solid var(--muted);
  transform:rotate(-45deg);display:inline-block;
}
.crumb li[aria-current]{color:var(--muted);font-weight:500;}
.page-head h1{
  font-size:clamp(30px,4.4vw,44px);
  font-weight:800;
  letter-spacing:0;
  margin-bottom:16px;
}
.page-head h1 span{color:var(--primary);}
.lead{font-size:17px;max-width:640px;}
.head-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px;}

.head-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-card);
  padding:22px;
}
.head-card h3{font-size:17px;margin-bottom:6px;}
.head-card p{font-size:14px;color:var(--body);margin-bottom:16px;}
.head-card dl{margin:0 0 18px;font-size:13px;}
.head-card dl div{display:flex;justify-content:space-between;gap:12px;padding:9px 0;border-bottom:1px dashed var(--line);}
.head-card dl div:last-child{border-bottom:0;}
.head-card dt{color:var(--muted);margin:0;}
.head-card dd{margin:0;color:var(--ink);font-weight:600;}

/* ---------- 板块通用 ---------- */
.section{padding:88px 0;}
.section--alt{background:var(--surface-2);}
.section-head{max-width:720px;margin-bottom:44px;}
.section-head h2{font-size:clamp(24px,3vw,32px);display:flex;align-items:center;gap:12px;}
.section-head h2::before{
  content:"";width:6px;height:26px;border-radius:3px;background:var(--primary);flex:none;
}
.section-head p{margin-top:12px;font-size:16px;}

/* ---------- 信息带 ---------- */
.infobar{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:0;
  margin-top:36px;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:var(--surface-2);
  overflow:hidden;
}
.infobar div{padding:16px 20px;border-right:1px solid var(--line);}
.infobar div:last-child{border-right:0;}
.infobar dt{font-size:12px;color:var(--muted);margin-bottom:4px;}
.infobar dd{margin:0;font-size:16px;font-weight:700;color:var(--ink);}

/* ---------- 时间线 ---------- */
.timeline{position:relative;padding-left:4px;}
.timeline::before{
  content:"";position:absolute;left:27px;top:20px;bottom:30px;width:2px;
  background:var(--line);
}
.tl-item{position:relative;padding:0 0 30px 84px;}
.tl-item:last-child{padding-bottom:0;}
.tl-num{
  position:absolute;left:4px;top:0;
  width:48px;height:48px;border-radius:var(--r-pill);
  display:grid;place-items:center;
  background:var(--surface);
  border:2px solid var(--line);
  color:var(--primary);
  font-weight:800;font-size:15px;
  font-family:Inter,system-ui,sans-serif;
  box-shadow:0 1px 2px rgba(16,36,84,.05);
}
.tl-item.is-key .tl-num{border-color:var(--accent);color:var(--accent-strong);}
.tl-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-card);
  padding:24px 26px;
  transition:box-shadow .25s ease,transform .25s ease;
}
.tl-card:hover{box-shadow:var(--sh-hover);transform:translateY(-3px);}
.tl-card h3{font-size:19px;margin-bottom:8px;display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.tl-card>p{font-size:15px;margin-bottom:14px;}
.tl-list li{
  position:relative;padding-left:20px;font-size:15px;line-height:1.7;margin-bottom:8px;
}
.tl-list li:last-child{margin-bottom:0;}
.tl-list li::before{
  content:"";position:absolute;left:2px;top:11px;
  width:7px;height:7px;border-radius:50%;background:var(--primary);
}
.tl-list li strong{color:var(--ink);font-weight:600;}
.tl-note{
  margin-top:16px;padding:12px 16px;
  border-left:3px solid var(--accent);
  background:var(--surface-2);
  border-radius:0 10px 10px 0;
  font-size:14px;color:var(--body);
}

/* ---------- 对照双列 ---------- */
.req-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.req-col{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-card);
  padding:26px;
}
.req-col__top{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:18px;}
.req-col__top h3{font-size:19px;}
.req-col__top span{font-size:13px;color:var(--muted);}
.req-row{
  display:grid;
  grid-template-columns:96px minmax(0,1fr) auto;
  align-items:center;
  gap:14px;
  padding:13px 0;
  border-bottom:1px dashed var(--line);
}
.req-row:last-child{border-bottom:0;}
.req-row dt{font-size:13px;color:var(--muted);margin:0;}
.req-row dd{margin:0;font-size:15px;color:var(--ink);font-weight:600;}
.req-legend{font-size:13px;color:var(--muted);margin-top:18px;}

/* ---------- 卡片网格 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-card);
  padding:26px;
  transition:box-shadow .25s ease,transform .25s ease,border-color .25s ease;
}
.card:hover{box-shadow:var(--sh-hover);transform:translateY(-3px);border-color:#D5DFF4;}
.card h3{font-size:18px;margin-bottom:10px;}
.card p{font-size:15px;}
.card .tag{
  display:inline-block;padding:3px 10px;border-radius:var(--r-pill);
  background:rgba(30,78,216,.10);color:var(--primary);
  font-size:12px;font-weight:600;margin-bottom:12px;
}
.card ul{margin-top:14px;}
.card ul li{position:relative;padding-left:18px;font-size:14.5px;margin-bottom:7px;}
.card ul li:last-child{margin-bottom:0;}
.card ul li::before{
  content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;
  background:var(--mint);
}
.card-media{
  border-radius:var(--r-sm);
  overflow:hidden;
  background:var(--surface-2);
  aspect-ratio:16/10;
  margin-bottom:18px;
}
.card-media img{width:100%;height:100%;object-fit:cover;}

/* ---------- FAQ ---------- */
.faq{max-width:900px;}
.faq details{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  margin-bottom:14px;
  overflow:hidden;
  transition:background .2s ease,border-color .2s ease;
}
.faq details[open]{background:var(--surface-2);border-color:#D5DFF4;}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  min-height:56px;
  padding:14px 22px;
  font-size:16px;font-weight:600;color:var(--ink);
  cursor:pointer;list-style:none;
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{
  content:"";flex:none;
  width:12px;height:12px;
  border-right:2px solid var(--primary);
  border-bottom:2px solid var(--primary);
  transform:rotate(45deg);
  transition:transform .2s ease;
  margin-top:-4px;
}
.faq details[open] summary::after{transform:rotate(225deg);margin-top:4px;}
.faq .faq-body{padding:0 22px 20px;font-size:15px;color:var(--body);}

/* ---------- 深色 CTA ---------- */
.cta{
  background:var(--ink-deep);
  border-radius:var(--r-lg);
  padding:48px;
  color:#C9D3E6;
  display:grid;
  grid-template-columns:minmax(0,1fr) 260px;
  gap:44px;
  align-items:center;
}
.cta h2{color:#fff;font-size:clamp(23px,2.8vw,30px);margin-bottom:12px;}
.cta p{color:#A9B6CE;font-size:15.5px;max-width:560px;}
.cta-btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px;}
.cta meta{display:block;}
.cta-facts{
  display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:22px;
  font-size:13px;color:#8FA0BE;
}
.cta-facts span strong{color:#fff;font-weight:600;}
.qr-box{
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.16);
  border-radius:var(--r-md);
  padding:20px;
  text-align:center;
}
.qr-img{
  width:140px;height:140px;margin:0 auto 12px;
  border-radius:12px;
  background:
    linear-gradient(#fff,#fff) padding-box,
    repeating-conic-gradient(#0D1526 0% 25%, #ffffff 0% 50%) 0 0/16px 16px;
  border:6px solid #fff;
}
.qr-box p{font-size:13px;color:#A9B6CE;}

/* ---------- 订阅表单 ---------- */
.subform{margin-top:26px;display:flex;gap:12px;flex-wrap:wrap;}
.subform input{
  flex:1 1 260px;
  height:48px;padding:0 16px;
  border:1px solid var(--line);border-radius:var(--r-sm);
  background:var(--surface);color:var(--ink);font-size:15px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.subform input::placeholder{color:var(--muted);}
.subform input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px rgba(30,78,216,.08);}
.form-hint{font-size:13px;color:var(--muted);margin-top:10px;}

/* ---------- 页脚 ---------- */
.footer{
  background:var(--ink-deep);
  color:#A9B6CE;
  padding:64px 0 0;
  margin-top:96px;
}
.footer__grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:36px;
  padding-bottom:44px;
}
.footer .brand{margin-bottom:16px;}
.footer .brand-mark{background:var(--accent);}
.footer .brand-text strong{color:#fff;}
.footer .brand-text em{color:#8899B8;}
.footer p{font-size:14px;line-height:1.8;color:#A9B6CE;}
.footer h4{
  color:var(--mint);
  font-size:14px;font-weight:500;
  letter-spacing:.06em;
  margin-bottom:16px;
}
.footer ul li{margin-bottom:10px;}
.footer ul a{
  position:relative;
  display:inline-block;
  font-size:14.5px;
  color:#A9B6CE;
  padding-left:0;
  transition:color .2s ease,padding-left .2s ease;
}
.footer ul a::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:2px;height:0;background:var(--accent);border-radius:2px;
  transition:height .2s ease;
}
.footer ul a:hover{color:#fff;padding-left:12px;}
.footer ul a:hover::before{height:14px;}
.footer__bottom{
  display:flex;flex-wrap:wrap;gap:12px 24px;
  justify-content:space-between;
  padding:20px 0 26px;
  border-top:1px solid rgba(255,255,255,.10);
  font-size:13px;color:#8899B8;
}
.footer__bottom a{color:#A9B6CE;}
.footer__bottom a:hover{color:#fff;}

/* ---------- 移动端抽屉 & 底部条 ---------- */
.burger{
  display:none;
  width:40px;height:40px;border-radius:12px;
  flex-direction:column;justify-content:center;align-items:center;gap:4px;
  border:1px solid var(--line);
}
.burger span{display:block;width:17px;height:2px;background:var(--ink);border-radius:2px;}
.drawer{
  position:fixed;inset:0;
  background:var(--surface);
  z-index:80;
  padding:22px 20px 108px;
  overflow-y:auto;
  transform:translateY(-8px);
  opacity:0;visibility:hidden;
  transition:opacity .22s ease,transform .22s ease,visibility .22s;
}
.drawer.is-open{opacity:1;visibility:visible;transform:translateY(0);}
.drawer__top{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px;}
.drawer__close{width:40px;height:40px;border-radius:12px;border:1px solid var(--line);font-size:20px;color:var(--ink);line-height:1;}
.drawer h5{font-size:13px;color:var(--muted);font-weight:500;margin:22px 0 12px;}
.drawer ul li a{
  display:block;padding:13px 14px;border-radius:12px;
  font-size:16px;color:var(--ink);font-weight:500;
}
.drawer ul li a:hover,.drawer ul li a.is-active{background:var(--surface-2);color:var(--primary);}
.drawer__cta{
  position:fixed;left:20px;right:20px;bottom:20px;
}
.mobile-bar{display:none;}

/* ---------- 骨架 / 占位 ---------- */
.skeleton{
  background:var(--surface-2);border-radius:var(--r-sm);
  animation:breathe 1200ms ease-in-out infinite;
}
@keyframes breathe{0%,100%{opacity:1;}50%{opacity:.55;}}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{max-width:100%;}
}
@media (max-width:1023px){
  body{padding-top:88px;}
  .dock-nav{display:none;}
  .dock .icon-btn{display:none;}
  .burger{display:flex;}
  .page-head__inner{grid-template-columns:1fr;gap:28px;padding:36px 0 44px;}
  .req-grid{grid-template-columns:1fr;}
  .card-grid{grid-template-columns:1fr;}
  .cta{grid-template-columns:1fr;padding:38px;}
  .footer__grid{grid-template-columns:1fr 1fr;gap:30px;}
  .section{padding:72px 0;}
}
@media (max-width:767px){
  body{padding-top:82px;padding-bottom:78px;font-size:15.5px;}
  .container{padding:0 20px;}
  .dock-wrap{top:10px;width:calc(100% - 20px);}
  .dock{height:56px;padding:0 10px 0 14px;gap:10px;}
  .dock-wrap.is-scrolled .dock{height:52px;}
  .brand-mark{width:34px;height:34px;border-radius:10px;font-size:13px;}
  .brand-text strong{font-size:14px;}
  .brand-text em{font-size:11px;}
  .infobar{grid-template-columns:1fr 1fr;}
  .infobar div{border-right:0;border-bottom:1px solid var(--line);}
  .infobar div:nth-child(odd){border-right:1px solid var(--line);}
  .infobar div:nth-last-child(-n+2){border-bottom:0;}
  .tl-item{padding-left:66px;}
  .timeline::before{left:21px;}
  .tl-num{width:40px;height:40px;font-size:14px;}
  .tl-card{padding:20px;}
  .req-col{padding:20px;}
  .req-row{grid-template-columns:80px minmax(0,1fr);row-gap:6px;}
  .req-row .badge{grid-column:2;}
  .cta{padding:28px 22px;border-radius:var(--r-md);}
  .cta-btns .btn{flex:1 1 100%;}
  .section{padding:56px 0;}
  .section-head{margin-bottom:30px;}
  .footer{padding:48px 0 0;margin-top:64px;}
  .footer__grid{grid-template-columns:1fr;gap:26px;}
  .mobile-bar{
    display:flex;align-items:center;justify-content:center;
    position:fixed;left:16px;right:16px;bottom:14px;height:52px;
    background:var(--accent);color:#fff;font-weight:600;font-size:15.5px;
    border-radius:14px;
    box-shadow:0 14px 30px -12px rgba(232,90,12,.9);
    z-index:70;
  }
  .mobile-bar:hover{color:#fff;}
}
@media (max-width:479px){
  .page-head h1{font-size:27px;}
  .lead{font-size:15.5px;}
  .infobar{grid-template-columns:1fr;}
  .infobar div{border-right:0 !important;border-bottom:1px solid var(--line);}
  .infobar div:last-child{border-bottom:0;}
  .tl-item{padding-left:0;padding-top:56px;}
  .timeline::before{left:20px;top:34px;bottom:20px;}
  .tl-num{left:0;}
  .card{padding:20px;}
  .cta-facts{flex-direction:column;gap:8px;}
}

/* roulang page: category4 */
:root{
  --primary:#1E4ED8;
  --primary-strong:#173FB0;
  --accent:#FF6B1A;
  --accent-strong:#E85A0C;
  --mint:#12B981;
  --danger:#E5484D;
  --ink:#0D1526;
  --body:#4B5568;
  --muted:#8892A6;
  --bg:#F4F7FC;
  --surface:#FFFFFF;
  --surface-2:#EEF3FB;
  --line:#E2E8F4;
  --ink-deep:#0E1B33;
  --r-block:20px;
  --r-card:16px;
  --r-btn:12px;
  --shadow-card:0 1px 2px rgba(16,36,84,.04), 0 12px 28px -12px rgba(16,36,84,.10);
  --shadow-card-hover:0 18px 40px -16px rgba(16,36,84,.18);
  --shadow-dock:0 10px 30px -12px rgba(16,36,84,.22);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-num:"Inter","Segoe UI",system-ui,sans-serif;
  --ease:cubic-bezier(.4,0,.2,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--body);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  padding-top:104px;
  padding-bottom:0;
}
img{max-width:100%;display:block}
a{color:var(--ink);text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease)}
a:hover{color:var(--primary)}
ul,ol{list-style:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{color:var(--ink);line-height:1.3;font-weight:700}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}

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

/* ---------- 浮动 Dock 导航 ---------- */
.dock-wrap{
  position:fixed;top:16px;left:0;right:0;z-index:120;
  display:flex;justify-content:center;padding:0 16px;
  pointer-events:none;
}
.dock{
  pointer-events:auto;
  width:min(1120px,100%);
  height:64px;
  display:flex;align-items:center;gap:16px;
  padding:0 16px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:20px;
  box-shadow:var(--shadow-card);
  transition:height .25s var(--ease),box-shadow .25s var(--ease);
}
.dock-wrap.is-scrolled .dock{height:60px;box-shadow:var(--shadow-dock)}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:38px;height:38px;border-radius:11px;
  background:var(--primary);color:#fff;
  display:grid;place-items:center;
  font-family:var(--font-num);font-weight:800;font-size:14px;letter-spacing:.02em;
}
.brand-text strong{display:block;font-size:15px;font-weight:800;color:var(--ink);line-height:1.2}
.brand-text em{display:block;font-style:normal;font-size:11px;letter-spacing:.08em;color:var(--muted);line-height:1.35}
.dock-nav{display:flex;align-items:center;gap:2px;margin-left:6px}
.dock-nav li{position:relative}
.dock-nav a{
  display:block;padding:8px 12px;border-radius:10px;
  font-size:14.5px;font-weight:600;color:var(--body);position:relative;
}
.dock-nav a:hover{color:var(--primary);background:var(--surface-2)}
.dock-nav a.is-active{color:var(--ink)}
.dock-nav a.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;border-radius:2px;background:var(--accent);
}
.dock-actions{margin-left:auto;display:flex;align-items:center;gap:8px}
.icon-btn{
  width:38px;height:38px;border-radius:999px;display:grid;place-items:center;
  color:var(--body);border:1px solid transparent;transition:background .2s var(--ease),color .2s var(--ease);
}
.icon-btn:hover{background:var(--surface-2);color:var(--primary)}
.burger{
  display:none;width:40px;height:40px;border-radius:10px;
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:transform .25s var(--ease),opacity .25s var(--ease)}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.drawer{
  position:fixed;inset:0;z-index:115;background:var(--surface);
  padding:96px 20px 132px;overflow-y:auto;
  transform:translateY(-102%);transition:transform .32s var(--ease);
}
.drawer.is-open{transform:translateY(0)}
.drawer h3{font-size:13px;letter-spacing:.12em;color:var(--muted);font-weight:700;margin:22px 0 10px}
.drawer h3:first-child{margin-top:0}
.drawer ul li + li{margin-top:4px}
.drawer ul a{
  display:flex;align-items:center;justify-content:space-between;
  padding:13px 14px;border-radius:12px;font-size:15.5px;font-weight:600;color:var(--ink);
  border:1px solid var(--line);
}
.drawer ul a:hover{background:var(--surface-2);border-color:#D3DDF2}
.drawer ul a.is-active{color:var(--primary);border-color:#C4D3F7;background:var(--surface-2)}
.drawer-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:116;
  padding:14px 20px 18px;background:var(--surface);border-top:1px solid var(--line);
  display:none;
}
.drawer-cta.is-open{display:block}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 20px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1.2;
  border:1px solid transparent;
  transition:background .2s var(--ease),color .2s var(--ease),transform .15s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.btn:active{transform:translateY(1px)}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 10px 22px -12px rgba(255,107,26,.75)}
.btn-accent:hover{background:var(--accent-strong);color:#fff;transform:translateY(-2px)}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-strong);color:#fff;transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--primary);border-color:var(--primary)}
.btn-ghost:hover{background:var(--surface-2);color:var(--primary-strong);border-color:var(--primary-strong)}
.btn-light{background:var(--surface);color:var(--primary);border-color:var(--line)}
.btn-light:hover{color:var(--primary-strong);border-color:#C4D3F7;transform:translateY(-2px)}
.btn-sm{padding:9px 14px;font-size:14px;border-radius:10px}
.btn-block{width:100%}
.btn:disabled{opacity:.6;cursor:not-allowed;transform:none}

/* ---------- 面包屑 ---------- */
.crumbs{padding:26px 0 0}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:13.5px;color:var(--muted)}
.crumbs li{display:flex;align-items:center;gap:6px}
.crumbs li + li::before{content:"";width:6px;height:6px;border-right:1.6px solid #B9C4D8;border-bottom:1.6px solid #B9C4D8;transform:rotate(-45deg);display:inline-block;margin-right:2px}
.crumbs a{color:var(--muted);font-weight:600}
.crumbs a:hover{color:var(--primary)}
.crumbs .current{color:var(--ink);font-weight:700}

/* ---------- 页头 ---------- */
.page-head{padding:24px 0 0}
.page-head__grid{
  display:grid;grid-template-columns:minmax(0,1.75fr) minmax(280px,1fr);
  gap:32px;align-items:start;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 12px;border-radius:999px;background:var(--surface-2);
  color:var(--primary);font-size:13px;font-weight:700;letter-spacing:.04em;
  border:1px solid #D8E2F7;
}
.page-head h1{
  font-size:clamp(28px,4vw,42px);font-weight:800;letter-spacing:0;
  margin:16px 0 14px;
}
.page-head h1 .accent{color:var(--primary)}
.lede{font-size:17px;color:var(--body);max-width:640px;line-height:1.85}
.lede strong{color:var(--ink)}
.head-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;
  font-size:13px;font-weight:600;background:var(--surface);border:1px solid var(--line);color:var(--body);
}
.tag--mint{background:rgba(18,185,129,.1);border-color:rgba(18,185,129,.28);color:#0B7D59}
.tag--accent{background:rgba(255,107,26,.1);border-color:rgba(255,107,26,.3);color:#B4460B}

.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-block);
  padding:24px;box-shadow:var(--shadow-card);
}
.side-card h3{font-size:18px;font-weight:700;margin-bottom:6px}
.side-card p{font-size:14px;color:var(--muted);line-height:1.7}
.side-list{margin:16px 0 18px}
.side-list li{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:10px 0;border-bottom:1px dashed var(--line);font-size:14px;
}
.side-list li:last-child{border-bottom:0}
.side-list span{color:var(--muted)}
.side-list b{font-family:var(--font-num);color:var(--ink);font-weight:700}

/* ---------- 板块通用 ---------- */
.section{padding:72px 0 0}
.section--tight{padding-top:56px}
.section-head{max-width:720px;margin-bottom:32px}
.section-head h2{
  font-size:clamp(24px,3vw,32px);font-weight:700;position:relative;padding-left:16px;
}
.section-head h2::before{
  content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:5px;border-radius:3px;background:var(--primary);
}
.section-head p{margin-top:12px;font-size:16px;color:var(--body)}

/* ---------- 数据看板 ---------- */
.board{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;
}
.metric{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px 20px;box-shadow:var(--shadow-card);
  position:relative;overflow:hidden;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.metric::after{
  content:"";position:absolute;left:0;top:0;height:3px;width:100%;
  background:linear-gradient(90deg,var(--primary),#7FA1F3);
  opacity:.85;
}
.metric:nth-child(2)::after{background:linear-gradient(90deg,var(--accent),#FFB183)}
.metric:nth-child(3)::after{background:linear-gradient(90deg,var(--mint),#7FE3C1)}
.metric:nth-child(4)::after{background:linear-gradient(90deg,#6D5BD0,#A79BF0)}
.metric:hover{transform:translateY(-3px);box-shadow:var(--shadow-card-hover);border-color:#D2DCF1}
.metric__label{font-size:13.5px;color:var(--muted);font-weight:600}
.metric__value{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:32px;font-weight:800;color:var(--ink);line-height:1.2;margin:10px 0 6px;
}
.metric__value small{font-size:15px;font-weight:700;color:var(--muted);margin-left:4px}
.metric__foot{font-size:13px;color:var(--muted)}

/* ---------- 更新卡片 2 列 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.update-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-card);overflow:hidden;
  display:flex;flex-direction:column;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.update-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-card-hover);border-color:#D2DCF1}
.update-card__media{aspect-ratio:16/9;overflow:hidden;background:var(--surface-2)}
.update-card__media img{width:100%;height:100%;object-fit:cover}
.update-card__body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:12px;flex:1}
.update-card__top{display:flex;align-items:center;justify-content:space-between;gap:12px}
.update-card h3{font-size:20px;font-weight:700}
.update-card p{font-size:15px;line-height:1.75;color:var(--body)}
.dot-list{display:grid;gap:8px;margin-top:2px}
.dot-list li{position:relative;padding-left:18px;font-size:14.5px;color:var(--body)}
.dot-list li::before{
  content:"";position:absolute;left:0;top:.62em;width:6px;height:6px;border-radius:50%;background:var(--primary);
}
.update-card .card-link{
  margin-top:auto;display:inline-flex;align-items:center;gap:6px;
  font-size:14.5px;font-weight:700;color:var(--primary);padding-top:6px;
}
.update-card .card-link:hover{color:var(--primary-strong)}

/* ---------- 版本对照表 ---------- */
.matrix{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-block);
  box-shadow:var(--shadow-card);overflow:hidden;
}
.matrix__row{
  display:grid;grid-template-columns:1.1fr 2.2fr 1.1fr 150px;
  gap:16px;align-items:center;padding:18px 24px;border-bottom:1px solid var(--line);
}
.matrix__row:last-child{border-bottom:0}
.matrix__head{
  background:var(--surface-2);font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--muted);
}
.matrix__ver{font-family:var(--font-num);font-weight:800;color:var(--ink);font-size:15px}
.matrix__desc{font-size:14.5px;color:var(--body)}
.matrix__date{font-family:var(--font-num);font-size:14px;color:var(--muted)}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:5px 11px;border-radius:999px;
  font-size:12.5px;font-weight:700;white-space:nowrap;
}
.badge--mint{background:rgba(18,185,129,.12);color:#0B7D59}
.badge--grey{background:var(--surface-2);color:var(--muted)}
.badge--accent{background:rgba(255,107,26,.12);color:#B4460B}
.matrix__row:hover:not(.matrix__head){background:#FAFCFF}

/* ---------- 注意事项 ---------- */
.notes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.note{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--shadow-card);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.note:hover{transform:translateY(-3px);box-shadow:var(--shadow-card-hover)}
.note__idx{
  font-family:var(--font-num);font-size:13px;font-weight:800;color:var(--accent);letter-spacing:.08em;
}
.note h3{font-size:17px;font-weight:700;margin:10px 0 8px}
.note p{font-size:14.5px;color:var(--body);line-height:1.75}

/* ---------- FAQ ---------- */
.faq{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-block);box-shadow:var(--shadow-card);overflow:hidden}
.faq details{border-bottom:1px solid var(--line);transition:background .2s var(--ease)}
.faq details:last-child{border-bottom:0}
.faq details[open]{background:var(--surface-2)}
.faq summary{
  list-style:none;cursor:pointer;min-height:56px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 24px;font-size:16px;font-weight:600;color:var(--ink);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  display:grid;place-items:center;background:var(--surface);border:1px solid var(--line);
  color:var(--primary);font-family:var(--font-num);font-size:17px;font-weight:700;
  transition:transform .2s var(--ease),background .2s var(--ease),color .2s var(--ease);
}
.faq details[open] summary::after{transform:rotate(45deg);background:var(--accent);color:#fff;border-color:var(--accent)}
.faq .faq__body{padding:0 24px 20px;font-size:15px;line-height:1.85;color:var(--body);max-width:900px}

/* ---------- 下载 CTA ---------- */
.cta-band{
  margin-top:72px;
  background:var(--ink-deep);
  border-radius:var(--r-block);
  padding:44px;
  display:grid;grid-template-columns:minmax(0,1.5fr) minmax(260px,1fr);
  gap:36px;align-items:center;
  box-shadow:0 24px 60px -28px rgba(14,27,51,.65);
}
.cta-band h2{color:#fff;font-size:clamp(22px,2.6vw,30px);font-weight:800}
.cta-band p{color:#A9B6CE;font-size:15.5px;margin-top:12px;max-width:560px}
.cta-btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.cta-meta{
  display:flex;flex-wrap:wrap;gap:18px;margin-top:22px;
  font-size:13.5px;color:#8B99B4;font-family:var(--font-num);font-variant-numeric:tabular-nums;
}
.cta-meta span{display:inline-flex;align-items:center;gap:6px}
.cta-side{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r-card);padding:22px;text-align:center;
}
.qr{
  width:120px;height:120px;margin:0 auto 14px;border-radius:12px;
  background:
    repeating-linear-gradient(90deg,rgba(255,255,255,.85) 0 6px,transparent 6px 12px),
    repeating-linear-gradient(0deg,rgba(255,255,255,.85) 0 6px,transparent 6px 12px),
    rgba(255,255,255,.12);
  border:6px solid rgba(255,255,255,.85);
}
.cta-side strong{display:block;color:#fff;font-size:15px}
.cta-side span{display:block;color:#8B99B4;font-size:13px;margin-top:6px}
.notice{
  margin-top:18px;font-size:13.5px;color:#8B99B4;
  border-left:3px solid var(--accent);padding-left:12px;line-height:1.7;
}

/* ---------- 页脚 ---------- */
.footer{margin-top:96px;background:var(--ink-deep);color:#B9C4D8;padding:64px 0 28px}
.footer .brand-text strong{color:#fff}
.footer .brand-text em{color:#8B99B4}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px}
.footer__grid p{font-size:14px;line-height:1.8;margin-top:16px;color:#8B99B4;max-width:340px}
.footer h4{font-size:14px;font-weight:600;color:var(--mint);margin-bottom:16px;letter-spacing:.02em}
.footer ul li + li{margin-top:10px}
.footer ul a{
  font-size:14.5px;color:#B9C4D8;position:relative;padding-left:0;
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.footer ul a::before{
  content:"";position:absolute;left:-10px;top:.55em;width:2px;height:12px;border-radius:2px;
  background:var(--accent);opacity:0;transition:opacity .2s var(--ease);
}
.footer ul a:hover{color:#fff;padding-left:0}
.footer ul a:hover::before{opacity:1}
.footer__bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between;
  font-size:13px;color:#7C8AA5;
}
.footer__bottom a{color:#B9C4D8}
.footer__bottom a:hover{color:#fff}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  body{padding-top:96px}
  .dock-nav{display:none}
  .burger{display:flex}
  .dock-actions .btn-sm{display:none}
  .page-head__grid{grid-template-columns:1fr;gap:24px}
  .board{grid-template-columns:repeat(2,minmax(0,1fr))}
  .notes{grid-template-columns:1fr}
  .cta-band{grid-template-columns:1fr;padding:34px}
  .matrix__row{grid-template-columns:1fr 2fr 1fr 120px;padding:16px 20px}
  .footer__grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:768px){
  body{padding-top:84px}
  .container{padding:0 20px}
  .dock-wrap{top:10px;padding:0 12px}
  .dock{height:56px;border-radius:18px;padding:0 12px}
  .dock-wrap.is-scrolled .dock{height:56px}
  .brand-mark{width:34px;height:34px;border-radius:10px;font-size:13px}
  .brand-text strong{font-size:14px}
  .section{padding:56px 0 0}
  .card-grid{grid-template-columns:1fr}
  .board{grid-template-columns:1fr;gap:16px}
  .matrix__head{display:none}
  .matrix__row{grid-template-columns:1fr;gap:10px;padding:18px 20px}
  .matrix__row .badge{justify-self:start}
  .cta-band{padding:26px;margin-top:56px}
  .footer{margin-top:64px;padding-top:48px}
  .footer__grid{grid-template-columns:1fr;gap:28px}
  .footer__bottom{flex-direction:column;gap:10px}
}
@media (max-width:480px){
  .page-head h1{font-size:26px}
  .lede{font-size:15.5px}
  .cta-btns .btn{width:100%}
  .metric__value{font-size:27px}
}