/* roulang page: index */
:root{
  --felt:#0E3B2C;
  --mint:#17A97A;
  --mint-hover:#0E8F66;
  --mint-active:#0B7353;
  --sand:#EDE6D6;
  --brick:#C9603C;
  --bg:#F6F5F1;
  --card:#FFFFFF;
  --line:#E3E0D7;
  --ink:#16211E;
  --muted:#5C6A65;
  --inv:#F3F6F4;
  --r-card:16px;
  --r-btn:12px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(14,59,44,.06);
  --sh-2:0 18px 40px -24px rgba(14,59,44,.35);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:'PingFang SC','HarmonyOS Sans SC','Microsoft YaHei',system-ui,sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--mint);outline-offset:2px}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

/* ---------- 布局骨架 ---------- */
.layout{display:flex;min-height:100vh;align-items:flex-start}
.sidebar{
  flex:0 0 240px;width:240px;background:var(--felt);color:var(--inv);
  position:sticky;top:0;height:100vh;overflow-y:auto;padding:24px 0 20px;
  border-right:1px solid rgba(237,230,214,.08);
}
.sidebar::-webkit-scrollbar{width:6px}
.sidebar::-webkit-scrollbar-thumb{background:rgba(237,230,214,.18);border-radius:999px}
.main-col{flex:1;min-width:0;display:flex;flex-direction:column}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:96px 0}
.section-tight{padding:64px 0}

/* ---------- 品牌 ---------- */
.brand{display:flex;align-items:center;gap:12px;padding:0 18px 4px;margin-bottom:8px}
.brand-mark{
  width:40px;height:40px;border-radius:12px;flex:0 0 40px;
  background:linear-gradient(140deg,#17A97A,#0E8F66);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:17px;font-weight:800;letter-spacing:-.02em;
  box-shadow:0 8px 18px -10px rgba(23,169,122,.9);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:15px;font-weight:800;color:#fff;letter-spacing:.01em}
.brand-text span{font-size:11.5px;color:rgba(243,246,244,.55);letter-spacing:.06em}

.nav-group-title{
  font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;
  color:rgba(243,246,244,.38);padding:0 20px;margin:22px 0 6px;
}
.nav-link{
  display:flex;align-items:center;gap:10px;
  height:44px;padding:0 18px;
  color:rgba(243,246,244,.76);font-size:14.5px;
  border-left:3px solid transparent;
  transition:background 200ms var(--ease),color 200ms var(--ease),border-color 200ms var(--ease);
}
.nav-link i{width:18px;font-size:14px;text-align:center;opacity:.85}
.nav-link:hover{background:rgba(237,230,214,.08);color:#fff}
.nav-link.active{background:rgba(237,230,214,.14);color:#fff;border-left-color:var(--mint)}
.nav-link:focus-visible{outline:2px solid var(--mint);outline-offset:-3px}

.side-version{
  margin:24px 16px 0;padding:16px;border-radius:14px;
  background:rgba(237,230,214,.10);border:1px solid rgba(237,230,214,.14);
}
.side-version .v-row{display:flex;align-items:center;justify-content:space-between;gap:8px}
.side-version .v-label{font-size:12px;color:rgba(243,246,244,.55)}
.side-version .v-value{font-size:14px;color:#fff;font-weight:700}
.side-version .v-time{font-size:12px;color:rgba(243,246,244,.5);margin-top:2px}
.side-version .btn{margin-top:12px;width:100%;justify-content:center;height:40px;font-size:14px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:transform 180ms var(--ease),background 180ms var(--ease),box-shadow 180ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease);
}
.btn-primary{background:var(--mint);color:#fff;box-shadow:0 10px 24px -16px rgba(23,169,122,.95)}
.btn-primary:hover{background:var(--mint-hover);transform:translateY(-1px);box-shadow:0 16px 30px -18px rgba(23,169,122,1)}
.btn-primary:active{background:var(--mint-active);transform:scale(.98)}
.btn-ghost{background:transparent;color:var(--felt);border:1px solid var(--felt)}
.btn-ghost:hover{background:var(--sand);transform:translateY(-1px)}
.btn-ghost:active{transform:scale(.98)}
.btn-lg{height:52px;padding:0 28px;font-size:16px}
.btn-block{width:100%}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--mint-hover);font-weight:600;font-size:15px;border-bottom:1px solid rgba(14,143,102,.4);padding-bottom:2px;transition:border-color 180ms var(--ease),color 180ms var(--ease)}
.btn-text:hover{color:var(--mint-active);border-color:var(--mint-active)}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 11px;
  border-radius:var(--r-pill);background:var(--sand);color:var(--felt);
  font-size:12px;font-weight:600;line-height:1;white-space:nowrap;
}
.badge-new{background:var(--brick);color:#fff}
.badge-outline{background:transparent;border:1px solid rgba(14,59,44,.22);color:var(--felt)}

/* ---------- Hero ---------- */
.hero-wrap{padding:48px 0 0}
.hero{
  position:relative;overflow:hidden;border-radius:24px;
  background:var(--card);border:1px solid var(--line);box-shadow:var(--sh-1);
  padding:56px;
}
.hero-bg{
  position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:.07;pointer-events:none;
}
.hero-inner{position:relative;display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center}
.hero h1{
  font-size:clamp(34px,4.4vw,58px);line-height:1.08;font-weight:800;letter-spacing:-.02em;
  color:var(--felt);
}
.hero h1 em{font-style:normal;color:var(--mint-hover)}
.hero-lead{margin-top:20px;max-width:620px;font-size:16.5px;color:var(--muted);line-height:1.95}
.hero-badges{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.hero-note{margin-top:16px;font-size:13px;color:var(--muted)}
.hero-figure{position:relative;border-radius:20px;overflow:hidden;border:1px solid var(--line);background:var(--sand);aspect-ratio:16/10}
.hero-figure img{width:100%;height:100%;object-fit:cover;transition:transform 400ms var(--ease)}
.hero-figure:hover img{transform:scale(1.03)}
.hero-float{
  position:absolute;left:18px;bottom:18px;right:18px;
  background:rgba(255,255,255,.94);border:1px solid var(--line);border-radius:14px;
  padding:12px 14px;display:flex;align-items:center;justify-content:space-between;gap:12px;
  box-shadow:var(--sh-1);
}
.hero-float span{font-size:12.5px;color:var(--muted)}
.hero-float strong{font-size:13.5px;color:var(--felt)}

/* ---------- 通用标题 ---------- */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.sec-kicker{font-size:12.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--mint-hover);font-weight:700;margin-bottom:10px}
.sec-title{font-size:clamp(24px,2.6vw,34px);font-weight:700;color:var(--felt);letter-spacing:-.01em;line-height:1.25}
.sec-desc{margin-top:12px;max-width:720px;color:var(--muted);font-size:15.5px}

/* ---------- 卡片 ---------- */
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease),border-color 220ms var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#d8d3c6}
.card-pad{padding:28px}
.icon-box{
  width:44px;height:44px;border-radius:12px;background:var(--sand);color:var(--felt);
  display:flex;align-items:center;justify-content:center;font-size:18px;flex:0 0 44px;
}
.icon-box.mint{background:rgba(23,169,122,.12);color:var(--mint-hover)}

/* 功能亮点 2+1 */
.feature-grid{display:grid;grid-template-columns:1.6fr 1fr;gap:24px}
.feature-big{display:flex;flex-direction:column;gap:24px;padding:32px}
.feature-big .fb-body{display:grid;grid-template-columns:1.15fr .85fr;gap:28px;align-items:center}
.feature-big h3{font-size:22px;font-weight:700;color:var(--felt);margin-bottom:12px}
.feature-big p{color:var(--muted);font-size:15.5px}
.feature-big img{border-radius:14px;border:1px solid var(--line);aspect-ratio:4/3;object-fit:cover;width:100%}
.feature-side{display:flex;flex-direction:column;gap:24px}
.feature-side .card{padding:26px;flex:1;display:flex;flex-direction:column;gap:12px}
.feature-side h3{font-size:17.5px;font-weight:700;color:var(--felt)}
.feature-side p{font-size:14.5px;color:var(--muted);line-height:1.85}
.tick-list{margin-top:6px;display:flex;flex-direction:column;gap:8px}
.tick-list li{display:flex;gap:9px;font-size:14.5px;color:var(--muted)}
.tick-list i{color:var(--mint);font-size:13px;margin-top:6px}

/* ---------- 截图轮播 ---------- */
.shots-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:24px}
.shots-ctrl{display:flex;gap:10px}
.shots-ctrl button{
  width:42px;height:42px;border-radius:50%;border:1px solid var(--felt);color:var(--felt);
  display:flex;align-items:center;justify-content:center;transition:background 180ms var(--ease),transform 180ms var(--ease);
}
.shots-ctrl button:hover{background:var(--sand)}
.shots-ctrl button:active{transform:scale(.94)}
.shots{
  display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:6px 4px 18px;scrollbar-width:thin;
}
.shots::-webkit-scrollbar{height:6px}
.shots::-webkit-scrollbar-thumb{background:#d6d2c6;border-radius:999px}
.shot{flex:0 0 32%;scroll-snap-align:start}
.shot-frame{
  border-radius:20px;border:1px solid var(--line);background:var(--sand);
  overflow:hidden;aspect-ratio:16/10;
}
.shot-frame img{width:100%;height:100%;object-fit:cover;transition:transform 400ms var(--ease)}
.shot:hover .shot-frame img{transform:scale(1.03)}
.shot figcaption{margin-top:10px;font-size:13px;color:var(--muted);text-align:center}

/* ---------- 系统要求 + 下载 ---------- */
.req-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:32px;align-items:start}
.req-list dt{font-size:14px;font-weight:700;color:var(--felt);padding-top:16px}
.req-list dd{font-size:15px;color:var(--muted);padding:6px 0 16px;border-bottom:1px dashed var(--line);margin:0}
.req-list div:last-child dd{border-bottom:0}
.dl-panel{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--sh-1);
}
.dl-panel h3{font-size:18px;font-weight:700;color:var(--felt);margin-bottom:6px}
.dl-panel .dl-sub{font-size:13.5px;color:var(--muted);margin-bottom:20px}
.qr{
  margin-top:20px;width:120px;height:120px;border-radius:14px;background:var(--sand);
  border:1px solid var(--line);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;
  color:var(--felt);font-size:12px;
}
.qr i{font-size:26px;color:var(--felt);opacity:.75}
.dl-meta{margin-top:18px;font-size:13px;color:var(--muted);line-height:1.8}

/* ---------- 评价墙 ---------- */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review{padding:26px;border:1px solid var(--line);background:var(--card);border-radius:var(--r-card);box-shadow:var(--sh-1);transition:transform 220ms var(--ease),box-shadow 220ms var(--ease)}
.review:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.review.offset{margin-top:28px}
.review-top{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.avatar{width:42px;height:42px;border-radius:50%;background:var(--sand);color:var(--felt);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;flex:0 0 42px}
.review-name{font-size:15px;font-weight:700;color:var(--felt)}
.review-meta{font-size:12.5px;color:var(--muted)}
.stars{color:#E4A93C;font-size:12.5px;letter-spacing:2px;margin-bottom:10px}
.review p{font-size:14.5px;color:var(--muted);line-height:1.85}

/* ---------- 内容列表 ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post{
  display:flex;flex-direction:column;gap:14px;padding:26px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);transition:transform 220ms var(--ease),box-shadow 220ms var(--ease),border-color 220ms var(--ease);
}
.post:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#d8d3c6}
.post h3{
  font-size:17px;font-weight:700;color:var(--felt);line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post p{
  font-size:14.5px;color:var(--muted);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.post-foot{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--muted);
}
.post-foot .read{color:var(--mint-hover);font-weight:600}
.empty-state{
  grid-column:1/-1;background:var(--sand);border-radius:var(--r-card);
  padding:56px 24px;text-align:center;color:var(--felt);
}
.empty-state i{font-size:28px;opacity:.6;display:block;margin-bottom:12px}
.empty-state p{font-size:15px;color:var(--muted);margin-bottom:18px}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px}
details.faq{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:box-shadow 200ms var(--ease),border-color 200ms var(--ease);
}
details.faq[open]{box-shadow:var(--sh-1);border-color:#d8d3c6}
details.faq summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;
  min-height:56px;padding:16px 24px;font-size:16px;font-weight:600;color:var(--felt);
  transition:background 180ms var(--ease);
}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary:hover{background:#FAF9F6}
details.faq summary::after{
  content:"\f067";font-family:"Font Awesome 6 Free";font-weight:900;font-size:13px;
  color:var(--mint-hover);flex:0 0 auto;transition:transform 240ms var(--ease);
}
details.faq[open] summary::after{content:"\f068"}
.faq-body{padding:0 24px 22px;font-size:15px;color:var(--muted);line-height:1.9;border-top:1px solid var(--line);padding-top:18px}

/* ---------- 底部 CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:24px;background:var(--felt);color:var(--inv);
  padding:52px 48px;display:flex;align-items:center;justify-content:space-between;gap:36px;
}
.cta-band .cta-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.06;pointer-events:none}
.cta-band h2{position:relative;font-size:clamp(22px,2.4vw,30px);font-weight:700;line-height:1.35;color:#fff}
.cta-band p{position:relative;margin-top:10px;font-size:14.5px;color:rgba(243,246,244,.72);max-width:560px}
.cta-actions{position:relative;display:flex;gap:12px;flex-wrap:wrap;flex:0 0 auto}
.cta-actions .btn-ghost{color:#fff;border-color:rgba(243,246,244,.55)}
.cta-actions .btn-ghost:hover{background:rgba(243,246,244,.12)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--felt);color:rgba(243,246,244,.72);margin-top:96px}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;
  padding:64px 0 40px;
}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand .brand-mark{box-shadow:none}
.footer-brand strong{color:#fff;font-size:15.5px;font-weight:800}
.footer p{font-size:13.5px;line-height:1.9;color:rgba(243,246,244,.62)}
.footer h4{font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:rgba(243,246,244,.45);margin-bottom:16px;font-weight:700}
.footer li a,.footer li span{display:block;font-size:14px;color:rgba(243,246,244,.75);padding:5px 0;transition:color 180ms var(--ease)}
.footer li a:hover{color:var(--mint)}
.footer-bottom{
  border-top:1px solid rgba(237,230,214,.08);
  padding:20px 0 28px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:rgba(243,246,244,.5);
}
.footer-bottom .vtag{display:inline-flex;align-items:center;gap:8px}
.footer-bottom .dot{width:6px;height:6px;border-radius:50%;background:var(--mint);display:inline-block}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;width:46px;height:46px;border-radius:50%;
  background:var(--felt);color:#fff;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-2);opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity 220ms var(--ease),transform 220ms var(--ease),visibility 220ms;
  z-index:60;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--mint-hover)}

/* ---------- 移动端顶部条与抽屉 ---------- */
.mobile-bar{display:none}
.drawer-mask{
  position:fixed;inset:0;background:rgba(11,20,18,.5);opacity:0;visibility:hidden;
  transition:opacity 220ms var(--ease),visibility 220ms;z-index:80;
}
.drawer-mask.show{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;left:0;bottom:0;width:280px;max-width:84vw;background:var(--felt);
  transform:translateX(-102%);transition:transform 260ms var(--ease);z-index:90;
  overflow-y:auto;padding:20px 0 24px;
}
.drawer.show{transform:translateX(0)}
.drawer-close{display:flex;justify-content:flex-end;padding:0 16px 6px}
.drawer-close button{width:38px;height:38px;border-radius:10px;color:#fff;background:rgba(237,230,214,.12);display:flex;align-items:center;justify-content:center}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .shot{flex:0 0 46%}
}
@media (max-width:1023px){
  .sidebar{display:none}
  .mobile-bar{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    height:56px;padding:0 16px;background:var(--felt);color:#fff;
    position:sticky;top:0;z-index:70;
  }
  .mobile-bar .brand{padding:0;margin:0}
  .mobile-bar .brand-mark{width:34px;height:34px;flex:0 0 34px;font-size:15px;border-radius:10px}
  .mobile-bar .brand-text strong{font-size:14px}
  .mobile-bar .brand-text span{font-size:10.5px}
  .menu-btn{width:40px;height:40px;border-radius:10px;background:rgba(237,230,214,.14);color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px}
  .container{padding:0 20px}
  .section{padding:64px 0}
  .hero{padding:36px}
  .hero-inner{grid-template-columns:1fr;gap:32px}
  .feature-grid{grid-template-columns:1fr}
  .feature-big .fb-body{grid-template-columns:1fr}
  .req-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:repeat(2,1fr)}
  .review.offset{margin-top:0}
  .post-grid{grid-template-columns:repeat(2,1fr)}
  .cta-band{flex-direction:column;align-items:flex-start;padding:40px 32px}
  .site-footer{margin-top:64px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .section{padding:52px 0}
  .hero{padding:28px 20px;border-radius:20px}
  .hero-wrap{padding:24px 0 0}
  .hero-actions .btn{flex:1 1 100%}
  .sec-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:26px}
  .shot{flex:0 0 82%}
  .review-grid{grid-template-columns:1fr}
  .post-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;padding:48px 0 28px;gap:28px}
  .cta-band{padding:32px 22px;border-radius:20px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 100%}
  .card-pad{padding:22px}
  details.faq summary{padding:14px 18px;font-size:15px}
  .faq-body{padding:16px 18px 20px}
}

/* roulang page: article */
:root{
  --felt:#0E3B2C;
  --felt-deep:#0A2C21;
  --mint:#17A97A;
  --mint-hover:#0E8F66;
  --mint-active:#0B7353;
  --cream:#EDE6D6;
  --sand:#C9603C;
  --paper:#F6F5F1;
  --card:#FFFFFF;
  --line:#E3E0D7;
  --ink:#16211E;
  --dim:#5C6A65;
  --invert:#F3F6F4;
  --r-card:16px;
  --r-btn:12px;
  --r-img:16px;
  --sh-soft:0 1px 2px rgba(14,59,44,.06);
  --sh-lift:0 18px 40px -24px rgba(14,59,44,.35);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sidebar-w:240px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--mint);outline-offset:2px;border-radius:4px;}

.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:var(--mint);color:#fff;padding:10px 16px;border-radius:0 0 12px 0;
}
.skip-link:focus{left:0;}

/* ---------- 布局骨架 ---------- */
.layout{display:flex;align-items:flex-start;min-height:100vh;}
.sidebar{
  width:var(--sidebar-w);
  flex:0 0 var(--sidebar-w);
  position:sticky;
  top:0;
  height:100vh;
  background:var(--felt);
  color:var(--invert);
  border-right:1px solid rgba(237,230,214,.12);
  padding:22px 0 0;
  display:flex;
  flex-direction:column;
  overflow-y:auto;
  z-index:60;
}
.side-brand{display:flex;align-items:center;gap:12px;padding:0 18px 20px;border-bottom:1px solid rgba(237,230,214,.12);}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:11px;
  background:linear-gradient(140deg,var(--mint),#0E8F66);
  color:#fff;font-weight:800;font-size:18px;
  display:flex;align-items:center;justify-content:center;
  letter-spacing:.02em;
}
.side-brand-text{display:flex;flex-direction:column;line-height:1.25;}
.side-brand-text strong{font-size:15px;font-weight:800;letter-spacing:.01em;}
.side-brand-text em{font-style:normal;font-size:12px;color:rgba(243,246,244,.62);letter-spacing:.04em;}
.side-group{
  padding:20px 18px 8px;
  font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:rgba(243,246,244,.42);
}
.side-nav{padding:0 16px;display:flex;flex-direction:column;gap:4px;}
.nav-link{
  position:relative;
  display:flex;align-items:center;gap:12px;
  height:44px;padding:0 14px;border-radius:10px;
  font-size:14.5px;color:rgba(243,246,244,.78);
  transition:background .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
}
.nav-link i{width:18px;text-align:center;font-size:15px;opacity:.85;}
.nav-link:hover{background:rgba(237,230,214,.10);color:var(--invert);transform:translateX(2px);}
.nav-link.active{background:rgba(237,230,214,.14);color:var(--invert);font-weight:600;}
.nav-link.active::before{
  content:"";position:absolute;left:-16px;top:50%;transform:translateY(-50%);
  width:3px;height:22px;border-radius:0 3px 3px 0;background:var(--mint);
}
.side-version{
  margin:24px 16px 20px;
  padding:16px;
  background:rgba(237,230,214,.08);
  border:1px solid rgba(237,230,214,.16);
  border-radius:14px;
  display:flex;flex-direction:column;gap:8px;
}
.side-version strong{font-size:14px;font-weight:700;font-variant-numeric:tabular-nums;}
.side-version span.t{font-size:12px;color:rgba(243,246,244,.6);}
.side-version .btn{margin-top:6px;}

.main{flex:1;min-width:0;padding:36px 48px 96px;}
.container{max-width:1160px;margin:0 auto;}

/* ---------- 移动端顶栏与抽屉 ---------- */
.mobile-topbar{
  display:none;
  position:sticky;top:0;z-index:80;
  height:56px;align-items:center;gap:12px;
  padding:0 16px;
  background:var(--felt);color:var(--invert);
  border-bottom:1px solid rgba(237,230,214,.12);
}
.mobile-topbar .hamburger{
  width:38px;height:38px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(237,230,214,.12);color:var(--invert);
  transition:background .2s var(--ease);
}
.mobile-topbar .hamburger:hover{background:rgba(237,230,214,.22);}
.mobile-brand{display:flex;align-items:center;gap:10px;font-size:14.5px;font-weight:700;overflow:hidden;white-space:nowrap;}
.mobile-brand .brand-mark{width:30px;height:30px;flex:0 0 30px;font-size:15px;border-radius:9px;}
.mobile-cta{
  margin-left:auto;flex:0 0 auto;
  background:var(--mint);color:#fff;font-size:13px;
  padding:8px 14px;border-radius:10px;font-weight:600;
  transition:background .2s var(--ease);
}
.mobile-cta:hover{background:var(--mint-hover);}
.drawer-mask{
  position:fixed;inset:0;background:rgba(11,20,18,.5);
  opacity:0;visibility:hidden;transition:opacity .24s var(--ease),visibility .24s;
  z-index:70;
}
body.drawer-open .drawer-mask{opacity:1;visibility:visible;}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--dim);margin-bottom:22px;
}
.breadcrumb a{color:var(--dim);transition:color .2s var(--ease);}
.breadcrumb a:hover{color:var(--mint-hover);}
.breadcrumb .sep{color:#B9B6AC;}
.breadcrumb .crumb-current{color:var(--ink);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ---------- 徽章 / 按钮 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:24px;padding:0 11px;border-radius:999px;
  background:var(--cream);color:var(--felt);
  font-size:12px;font-weight:600;letter-spacing:.01em;white-space:nowrap;
}
.badge-sand{background:var(--sand);color:#fff;}
.badge-outline{background:transparent;border:1px solid var(--line);color:var(--felt);font-weight:500;}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:transform .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn-primary{background:var(--mint);color:#fff;box-shadow:var(--sh-soft);}
.btn-primary:hover{background:var(--mint-hover);transform:translateY(-1px);box-shadow:var(--sh-lift);}
.btn-primary:active{background:var(--mint-active);transform:scale(.98);}
.btn-ghost{background:transparent;border:1px solid var(--felt);color:var(--felt);}
.btn-ghost:hover{background:var(--cream);transform:translateY(-1px);}
.btn-block{width:100%;}
.btn-sm{height:38px;padding:0 16px;font-size:13.5px;border-radius:10px;}
.link-more{
  color:var(--mint-active);font-weight:600;font-size:14px;
  text-decoration:underline;text-underline-offset:3px;
  transition:color .2s var(--ease);
}
.link-more:hover{color:var(--felt);}

/* ---------- 文章头 ---------- */
.article-head{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:32px 32px 28px;
  box-shadow:var(--sh-soft);
  position:relative;
  overflow:hidden;
}
.article-head::after{
  content:"";position:absolute;right:-60px;top:-60px;width:200px;height:200px;border-radius:50%;
  background:radial-gradient(circle,rgba(23,169,122,.12),rgba(23,169,122,0) 70%);
  pointer-events:none;
}
.article-title{
  font-size:clamp(28px,3.6vw,42px);
  line-height:1.22;
  font-weight:800;
  letter-spacing:-.02em;
  margin:16px 0 18px;
  max-width:22ch;
}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  font-size:13.5px;color:var(--dim);
  padding-top:16px;border-top:1px dashed var(--line);
}
.meta-row span{display:inline-flex;align-items:center;gap:7px;font-variant-numeric:tabular-nums;}
.meta-row i{color:var(--mint);font-size:13px;}
.article-cover{
  margin-top:24px;border-radius:var(--r-img);overflow:hidden;
  border:1px solid var(--line);aspect-ratio:16/9;background:var(--cream);
}
.article-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.article-cover:hover img{transform:scale(1.03);}

/* ---------- 正文与目录 ---------- */
.article-shell{
  display:grid;grid-template-columns:minmax(0,1fr);gap:36px;
  margin-top:32px;
}
.article-body{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:36px 36px 40px;
  box-shadow:var(--sh-soft);
  font-size:17px;line-height:1.9;color:var(--ink);
  max-width:780px;
}
.article-body > * + *{margin-top:1.1em;}
.article-body h2{
  position:relative;
  font-size:26px;line-height:1.35;font-weight:700;letter-spacing:-.01em;
  margin-top:2.1em;padding-left:14px;
  scroll-margin-top:96px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.34em;
  width:4px;height:19px;border-radius:2px;background:var(--mint);
}
.article-body h3{font-size:20px;line-height:1.5;font-weight:600;margin-top:1.7em;}
.article-body p{color:var(--ink);}
.article-body strong{font-weight:700;}
.article-body a{color:var(--mint-active);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--felt);}
.article-body ul,.article-body ol{padding-left:0;display:flex;flex-direction:column;gap:10px;}
.article-body ul li{position:relative;padding-left:20px;}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.72em;
  width:7px;height:7px;border-radius:2px;background:var(--mint);
}
.article-body ol{counter-reset:li;}
.article-body ol li{position:relative;padding-left:30px;counter-increment:li;}
.article-body ol li::before{
  content:counter(li);
  position:absolute;left:0;top:.28em;
  width:20px;height:20px;border-radius:6px;
  background:var(--cream);color:var(--felt);
  font-size:12px;font-weight:700;line-height:20px;text-align:center;
  font-variant-numeric:tabular-nums;
}
.article-body blockquote{
  margin-left:0;margin-right:0;
  background:var(--cream);
  border-left:4px solid var(--felt);
  border-radius:0 12px 12px 0;
  padding:18px 22px;
  color:#2C3B36;
}
.article-body blockquote p{margin:0;color:#2C3B36;}
.article-body img{border-radius:var(--r-img);border:1px solid var(--line);margin-top:1.4em;}
.article-body figure{margin:1.6em 0 0;}
.article-body figcaption,
.article-body .caption{
  font-size:13px;color:var(--dim);text-align:center;margin-top:10px;line-height:1.6;
}
.article-body table{
  width:100%;border-collapse:collapse;font-size:15px;
  border:1px solid var(--line);border-radius:12px;overflow:hidden;
  margin-top:1.5em;
}
.article-body thead th{
  background:var(--cream);color:var(--felt);
  font-weight:700;text-align:left;
}
.article-body th,.article-body td{
  padding:12px 14px;border-bottom:1px solid var(--line);
  font-variant-numeric:tabular-nums;
}
.article-body tbody tr:last-child td{border-bottom:0;}
.article-body tbody tr:hover{background:#FBFAF7;}
.article-body code{
  background:var(--cream);border-radius:6px;padding:2px 6px;
  font-size:14.5px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
}
.article-body hr{border:0;border-top:1px dashed var(--line);margin:2em 0;}

.toc{
  display:none;
  align-self:flex-start;
  position:sticky;top:32px;
  width:260px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:20px 18px;
  box-shadow:var(--sh-soft);
}
.toc-title{
  font-size:13px;letter-spacing:.12em;color:var(--dim);
  font-weight:700;margin-bottom:12px;
}
.toc-list{display:flex;flex-direction:column;gap:2px;}
.toc-list a{
  display:block;font-size:13.5px;line-height:1.6;
  color:var(--dim);padding:7px 10px;border-radius:8px;
  border-left:2px solid transparent;
  transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
}
.toc-list a:hover{color:var(--felt);background:var(--paper);}
.toc-list a.active{
  color:var(--felt);font-weight:600;
  background:var(--cream);border-left-color:var(--mint);
}

/* ---------- 空态 ---------- */
.empty-state{
  background:var(--cream);
  border-radius:var(--r-card);
  padding:56px 32px;
  text-align:center;
  display:flex;flex-direction:column;align-items:center;gap:12px;
  max-width:780px;
}
.empty-state i{font-size:34px;color:var(--felt);opacity:.55;}
.empty-state h2{font-size:22px;font-weight:700;}
.empty-state p{color:var(--dim);font-size:15px;max-width:44ch;}
.empty-state .btn{margin-top:10px;}

/* ---------- 相关推荐 ---------- */
.section{margin-top:72px;}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:20px;
  margin-bottom:24px;padding-bottom:14px;border-bottom:1px solid var(--line);
}
.section-head h2{font-size:26px;font-weight:800;letter-spacing:-.01em;}
.section-head p{font-size:14px;color:var(--dim);}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.post-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-soft);
  overflow:hidden;
  display:flex;flex-direction:column;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--sh-lift);border-color:#D6D2C6;}
.post-thumb{aspect-ratio:16/10;overflow:hidden;background:var(--cream);}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.post-card:hover .post-thumb img{transform:scale(1.03);}
.post-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.post-body h3{font-size:17.5px;font-weight:700;line-height:1.5;}
.post-body p{font-size:14px;color:var(--dim);line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.post-foot{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--dim);
}
.post-foot a{color:var(--mint-active);font-weight:600;}
.post-foot a:hover{color:var(--felt);}
.back-row{margin-top:28px;}

/* ---------- 底部 CTA ---------- */
.cta-block{
  margin-top:72px;
  border-radius:24px;
  padding:48px;
  color:var(--invert);
  background-color:var(--felt);
  background-image:linear-gradient(rgba(14,59,44,.93),rgba(10,44,33,.96)),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;
  box-shadow:var(--sh-lift);
}
.cta-block h2{font-size:clamp(24px,3vw,34px);font-weight:800;line-height:1.25;letter-spacing:-.01em;}
.cta-block p{margin-top:10px;font-size:14.5px;color:rgba(243,246,244,.75);max-width:52ch;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}
.cta-actions .btn-primary{background:var(--mint);}
.cta-actions .btn-outline-light{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-btn);
  border:1px solid rgba(243,246,244,.45);color:var(--invert);
  font-size:15px;font-weight:600;
  transition:background .2s var(--ease),transform .2s var(--ease),border-color .2s var(--ease);
}
.cta-actions .btn-outline-light:hover{background:rgba(243,246,244,.14);border-color:rgba(243,246,244,.7);transform:translateY(-1px);}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--felt);
  color:var(--invert);
  margin-top:0;
  padding:64px 0 26px;
  border-top:1px solid rgba(237,230,214,.12);
}
.site-footer .container{padding:0 48px;}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:36px;
  padding-bottom:38px;
  border-bottom:1px solid rgba(237,230,214,.12);
}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:14px;}
.footer-brand strong{font-size:16px;font-weight:800;}
.footer-grid h4{
  font-size:13px;letter-spacing:.12em;color:rgba(243,246,244,.55);
  font-weight:700;margin-bottom:14px;
}
.footer-grid p{font-size:13.5px;color:rgba(243,246,244,.7);line-height:1.85;max-width:44ch;}
.footer-grid ul{display:flex;flex-direction:column;gap:10px;}
.footer-grid ul a,.footer-grid ul span{
  font-size:14px;color:rgba(243,246,244,.78);transition:color .2s var(--ease);
}
.footer-grid ul a:hover{color:var(--mint);}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding-top:22px;font-size:13px;color:rgba(243,246,244,.6);
}
.vtag{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.02em;}
.vtag .dot{width:7px;height:7px;border-radius:50%;background:var(--mint);display:inline-block;}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:90;
  width:46px;height:46px;border-radius:50%;
  background:var(--felt);color:var(--invert);
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-lift);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s,background .2s var(--ease);
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--mint-active);}

/* ---------- 进入视口淡入 ---------- */
.reveal{opacity:0;transform:translateY(8px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.reveal.in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (min-width:1280px){
  .article-shell{grid-template-columns:minmax(0,780px) 260px;justify-content:center;}
  .toc{display:block;}
}
@media (max-width:1279px){
  .main{padding:32px 36px 80px;}
}
@media (max-width:1023px){
  .mobile-topbar{display:flex;}
  .layout{display:block;}
  .sidebar{
    position:fixed;left:0;top:0;bottom:0;height:100%;
    transform:translateX(-102%);
    transition:transform .28s var(--ease);
    padding-top:18px;
    box-shadow:var(--sh-lift);
  }
  body.drawer-open .sidebar{transform:translateX(0);}
  .main{padding:24px 20px 72px;}
  .site-footer .container{padding:0 20px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-block{padding:36px 28px;}
}
@media (max-width:640px){
  .article-head{padding:24px 20px 22px;}
  .article-title{max-width:100%;}
  .article-body{padding:24px 20px 28px;font-size:16px;}
  .article-body h2{font-size:21px;}
  .article-body table{font-size:13.5px;}
  .article-body th,.article-body td{padding:10px;}
  .card-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .section{margin-top:56px;}
  .cta-block{margin-top:56px;border-radius:20px;}
  .cta-actions{width:100%;}
  .cta-actions .btn,.cta-actions .btn-outline-light{flex:1 1 auto;}
  .main{padding:20px 16px 64px;}
  .to-top{right:16px;bottom:16px;}
}

/* roulang page: category1 */
:root{
    --felt:#0E3B2C;
    --felt-deep:#0A2C21;
    --mint:#17A97A;
    --mint-hover:#0E8F66;
    --mint-active:#0B7353;
    --sand:#EDE6D6;
    --sand-soft:#F4EFE4;
    --orange:#C9603C;
    --bg:#F6F5F1;
    --card:#FFFFFF;
    --line:#E3E0D7;
    --ink:#16211E;
    --muted:#5C6A65;
    --inv:#F3F6F4;
    --r-card:16px;
    --r-btn:12px;
    --r-img:16px;
    --sh-1:0 1px 2px rgba(14,59,44,.06);
    --sh-2:0 18px 40px -24px rgba(14,59,44,.35);
    --ease:cubic-bezier(.2,.7,.3,1);
    --side-w:240px;
  }
  *,*::before,*::after{box-sizing:border-box;}
  body{
    margin:0;
    background:var(--bg);
    color:var(--ink);
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
    font-size:16px;
    line-height:1.9;
    -webkit-font-smoothing:antialiased;
  }
  img{display:block;max-width:100%;height:auto;}
  a{color:inherit;text-decoration:none;}
  button{font-family:inherit;}
  h1,h2,h3,h4,p,ul,ol,dl,dd{margin:0;padding:0;}
  ul,ol{list-style:none;}
  ::selection{background:var(--mint);color:#fff;}
  a:focus-visible,button:focus-visible,summary:focus-visible{
    outline:2px solid var(--mint);
    outline-offset:2px;
    border-radius:6px;
  }
  .num{font-variant-numeric:tabular-nums;}

  .app{display:block;min-height:100vh;}
  .container{width:100%;max-width:1280px;margin:0 auto;padding:0 24px;}

  /* ============ 左侧竖导航 ============ */
  .sidebar{
    position:fixed;
    top:0;left:0;bottom:0;
    width:272px;
    background:var(--felt);
    color:var(--inv);
    padding:22px 16px 24px;
    overflow-y:auto;
    transform:translateX(-100%);
    transition:transform .24s var(--ease);
    z-index:60;
    border-right:1px solid rgba(237,230,214,.12);
  }
  .sidebar.open{transform:translateX(0);}
  .side-inner{display:flex;flex-direction:column;min-height:100%;gap:4px;}
  .brand{display:flex;align-items:center;gap:12px;padding:6px 8px 18px;border-bottom:1px solid rgba(237,230,214,.12);margin-bottom:16px;}
  .brand-mark{
    width:40px;height:40px;flex:none;border-radius:11px;
    background:var(--sand);color:var(--felt);
    display:grid;place-items:center;
    font-weight:800;font-size:18px;letter-spacing:0;
  }
  .brand-text{display:flex;flex-direction:column;line-height:1.25;}
  .brand-text strong{color:#fff;font-size:15px;font-weight:700;}
  .brand-text span{color:rgba(243,246,244,.6);font-size:12.5px;letter-spacing:.02em;}
  .side-group{
    font-size:11.5px;letter-spacing:.14em;
    color:rgba(237,230,214,.45);
    padding:16px 10px 6px;text-transform:uppercase;
  }
  .nav-link{
    display:flex;align-items:center;gap:10px;
    height:44px;padding:0 12px;border-radius:10px;
    color:rgba(243,246,244,.78);
    font-size:14.5px;
    transition:background .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
  }
  .nav-link i{width:18px;font-size:14px;text-align:center;opacity:.85;}
  .nav-link:hover{background:rgba(237,230,214,.1);color:#fff;transform:translateX(2px);}
  .nav-link.active{
    background:var(--sand);color:var(--felt);font-weight:600;
    box-shadow:inset 3px 0 0 var(--mint);
  }
  .nav-link.active i{opacity:1;color:var(--felt);}
  .side-card{
    margin-top:auto;
    background:rgba(237,230,214,.09);
    border:1px solid rgba(237,230,214,.16);
    border-radius:14px;
    padding:14px;color:rgba(243,246,244,.75);
    font-size:12.5px;line-height:1.7;
  }
  .side-card strong{display:block;color:#fff;font-size:14px;margin-bottom:2px;}
  .side-card .btn{width:100%;margin-top:12px;height:42px;font-size:14px;}

  .mask{
    position:fixed;inset:0;background:rgba(11,20,18,.5);
    opacity:0;visibility:hidden;transition:opacity .22s var(--ease),visibility .22s;
    z-index:55;
  }
  .mask.show{opacity:1;visibility:visible;}

  /* ============ 移动端顶栏 ============ */
  .topbar{
    position:sticky;top:0;z-index:50;
    height:56px;display:flex;align-items:center;justify-content:space-between;
    padding:0 16px;background:var(--felt);color:#fff;
    box-shadow:0 2px 10px rgba(14,59,44,.18);
  }
  .topbar-brand{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:700;}
  .topbar-brand .brand-mark{width:32px;height:32px;border-radius:9px;font-size:15px;}
  .topbar-brand em{font-style:normal;font-weight:500;font-size:12.5px;color:rgba(243,246,244,.66);}
  .burger{
    width:40px;height:40px;border:none;border-radius:10px;
    background:rgba(237,230,214,.12);color:#fff;font-size:16px;
    display:grid;place-items:center;cursor:pointer;
    transition:background .18s var(--ease);
  }
  .burger:hover{background:rgba(237,230,214,.22);}
  .burger:active{transform:scale(.96);}

  .content{min-width:0;}

  @media (min-width:1024px){
    .app{display:grid;grid-template-columns:var(--side-w) minmax(0,1fr);}
    .sidebar{
      position:sticky;top:0;width:var(--side-w);height:100vh;
      transform:none;padding:22px 14px 24px;
    }
    .topbar{display:none;}
    .mask{display:none;}
  }

  /* ============ 按钮 / 徽章 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 22px;border-radius:var(--r-btn);
    font-size:15px;font-weight:600;cursor:pointer;
    border:1px solid transparent;
    transition:background .18s var(--ease),color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
  }
  .btn-primary{background:var(--mint);color:#fff;box-shadow:0 8px 20px -14px rgba(23,169,122,.9);}
  .btn-primary:hover{background:var(--mint-hover);transform:translateY(-1px);box-shadow:0 14px 28px -16px rgba(23,169,122,.95);}
  .btn-primary:active{background:var(--mint-active);transform:scale(.98);}
  .btn-ghost{border-color:rgba(14,59,44,.35);color:var(--felt);background:transparent;}
  .btn-ghost:hover{background:var(--sand);border-color:var(--sand);}
  .btn-ghost:active{transform:scale(.98);}
  .btn-ghost-inv{border-color:rgba(243,246,244,.45);color:#fff;background:transparent;}
  .btn-ghost-inv:hover{background:rgba(237,230,214,.14);border-color:rgba(237,230,214,.5);}
  .btn-sm{height:40px;padding:0 16px;font-size:13.5px;border-radius:10px;}

  .badge{
    display:inline-flex;align-items:center;gap:6px;
    height:24px;padding:0 10px;border-radius:999px;
    background:var(--sand);color:var(--felt);
    font-size:12px;font-weight:600;line-height:1;white-space:nowrap;
  }
  .badge-outline{background:transparent;border:1px solid rgba(14,59,44,.2);color:var(--felt);}
  .badge-alert{background:var(--orange);color:#fff;}
  .badge i{font-size:11px;}

  /* ============ Hero ============ */
  .cat-hero{
    position:relative;overflow:hidden;
    border-radius:24px;
    background:var(--felt);
    color:#fff;
    padding:56px 40px;
    margin-top:28px;
    box-shadow:var(--sh-2);
  }
  .cat-hero::before{
    content:"";position:absolute;inset:0;
    background-image:url('/assets/images/backpic/back-1.png');
    background-size:cover;background-position:center;
    opacity:.24;
  }
  .cat-hero::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(105deg,rgba(10,44,33,.92) 0%,rgba(10,44,33,.55) 62%,rgba(10,44,33,.25) 100%);
  }
  .hero-inner{position:relative;z-index:2;max-width:760px;}
  .crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(243,246,244,.62);margin-bottom:20px;}
  .crumbs a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}
  .crumbs span.sep{opacity:.5;}
  .hero-tag{
    display:inline-flex;align-items:center;gap:8px;
    background:rgba(237,230,214,.14);
    border:1px solid rgba(237,230,214,.24);
    color:var(--sand);
    font-size:12.5px;height:28px;padding:0 12px;border-radius:999px;margin-bottom:20px;
  }
  .cat-hero h1{
    font-size:clamp(30px,4.2vw,52px);
    font-weight:800;line-height:1.12;letter-spacing:-.02em;
    margin-bottom:18px;
  }
  .cat-hero h1 .hl{color:#7FE3BD;}
  .hero-lead{
    font-size:16.5px;line-height:1.85;
    color:rgba(243,246,244,.78);
    max-width:640px;margin-bottom:26px;
  }
  .hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px;}
  .hero-badges .badge{background:rgba(237,230,214,.14);color:var(--sand);border:1px solid rgba(237,230,214,.2);height:28px;padding:0 12px;}
  .hero-badges .badge.is-new{background:var(--orange);color:#fff;border-color:transparent;}
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;}

  /* ============ 板块通用 ============ */
  .sec{padding:72px 0 0;}
  .sec-head{max-width:720px;margin-bottom:34px;}
  .sec-head h2{
    font-size:clamp(23px,2.5vw,32px);font-weight:700;line-height:1.28;letter-spacing:-.01em;
    margin-bottom:12px;
  }
  .sec-head p{color:var(--muted);font-size:15.5px;line-height:1.85;}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12.5px;font-weight:700;letter-spacing:.14em;
    color:var(--mint);text-transform:uppercase;margin-bottom:12px;
  }
  .eyebrow::before{content:"";width:22px;height:2px;background:var(--mint);border-radius:2px;}

  /* ============ 指南布局：长文 + 吸顶侧栏 ============ */
  .guide-layout{display:grid;gap:34px;align-items:start;}
  @media (min-width:1180px){
    .guide-layout{grid-template-columns:minmax(0,1fr) 300px;gap:44px;}
  }
  .guide-main{
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
    padding:34px 30px;box-shadow:var(--sh-1);
  }
  .article{max-width:740px;}
  .article h2{
    position:relative;
    font-size:24px;font-weight:700;line-height:1.4;
    padding-left:14px;margin:44px 0 16px;
  }
  .article h2:first-of-type{margin-top:0;}
  .article h2::before{
    content:"";position:absolute;left:0;top:.2em;
    width:3px;height:.9em;border-radius:2px;background:var(--mint);
  }
  .article h3{font-size:18px;font-weight:600;line-height:1.6;margin:26px 0 10px;}
  .article p{font-size:16.5px;line-height:1.95;color:#2A3633;margin-bottom:16px;max-width:720px;}
  .article strong{color:var(--felt);}
  .article .note{
    background:var(--sand);
    border-left:4px solid var(--felt);
    border-radius:12px;
    padding:16px 18px;
    color:#3B4A45;font-size:15px;line-height:1.85;
    margin:22px 0;
  }
  .article .note.alert{border-left-color:var(--orange);}
  .article ul.dot{display:grid;gap:10px;margin:14px 0 22px;}
  .article ul.dot li{position:relative;padding-left:18px;font-size:16px;line-height:1.9;color:#2A3633;}
  .article ul.dot li::before{
    content:"";position:absolute;left:0;top:.72em;
    width:7px;height:7px;border-radius:2px;background:var(--mint);
  }

  .step-row{display:flex;gap:16px;padding:18px 0;border-bottom:1px dashed var(--line);}
  .step-row:last-child{border-bottom:none;}
  .step-num{
    width:32px;height:32px;flex:none;border-radius:999px;
    background:var(--sand);color:var(--felt);
    display:grid;place-items:center;font-weight:700;font-size:14px;
  }
  .step-body h3{margin:0 0 6px;font-size:17px;font-weight:600;}
  .step-body p{margin:0;font-size:15.5px;line-height:1.85;color:#414F4A;}

  /* ============ 右侧吸顶栏 ============ */
  .rail{display:grid;gap:20px;position:sticky;top:24px;}
  .rail-card{
    background:var(--card);border:1px solid var(--line);
    border-radius:var(--r-card);padding:22px;box-shadow:var(--sh-1);
  }
  .rail-card.down{
    background:var(--sand-soft);
    background-image:url('/assets/images/backpic/back-2.png');
    background-size:cover;background-position:center;
    background-blend-mode:soft-light;
  }
  .rail-card h3{font-size:16px;font-weight:700;margin-bottom:6px;}
  .rail-card .meta{font-size:13px;color:var(--muted);line-height:1.7;margin-bottom:16px;}
  .rail-card .spec{display:grid;gap:0;margin-bottom:18px;}
  .rail-card .spec div{
    display:flex;justify-content:space-between;gap:12px;
    padding:9px 0;border-bottom:1px dashed rgba(14,59,44,.16);
    font-size:13.5px;color:#3B4A45;
  }
  .rail-card .spec div:last-child{border-bottom:none;}
  .rail-card .spec b{color:var(--felt);font-weight:600;}
  .qr-box{
    margin-top:16px;height:120px;border-radius:14px;
    background:var(--card);border:1px dashed rgba(14,59,44,.22);
    display:grid;place-items:center;gap:4px;text-align:center;color:var(--muted);
  }
  .qr-box i{font-size:26px;color:var(--felt);}
  .qr-box span{font-size:12px;}

  .toc-list{display:grid;gap:2px;}
  .toc-list a{
    display:block;padding:8px 10px;border-radius:9px;
    font-size:14px;color:var(--muted);
    border-left:2px solid transparent;
    transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
  }
  .toc-list a:hover{background:var(--sand-soft);color:var(--felt);}
  .toc-list a.on{background:var(--sand);color:var(--felt);font-weight:600;border-left-color:var(--mint);}

  /* ============ 双路线对照 ============ */
  .route-grid{display:grid;gap:20px;grid-template-columns:repeat(2,minmax(0,1fr));}
  .route-card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
    padding:26px;box-shadow:var(--sh-1);
    transition:transform .22s var(--ease),box-shadow .22s var(--ease);
  }
  .route-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
  .route-card .route-top{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
  .route-icon{
    width:44px;height:44px;border-radius:13px;flex:none;
    background:var(--sand);color:var(--felt);display:grid;place-items:center;font-size:19px;
  }
  .route-card h3{font-size:18px;font-weight:700;}
  .route-card .route-sub{font-size:13px;color:var(--muted);}
  .route-card ul{display:grid;gap:10px;margin-top:6px;}
  .route-card ul li{
    display:flex;gap:10px;font-size:15px;line-height:1.8;color:#37443F;
  }
  .route-card ul li i{color:var(--mint);font-size:13px;margin-top:7px;}

  /* ============ 常见提示处理 ============ */
  .fix-grid{display:grid;gap:16px;grid-template-columns:repeat(3,minmax(0,1fr));}
  .fix-card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
    padding:22px;box-shadow:var(--sh-1);
    transition:transform .22s var(--ease),box-shadow .22s var(--ease);
  }
  .fix-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
  .fix-card .code{
    font-size:12px;font-weight:700;letter-spacing:.08em;color:var(--orange);
    display:inline-flex;align-items:center;gap:6px;margin-bottom:10px;
  }
  .fix-card h3{font-size:16.5px;font-weight:600;margin-bottom:8px;}
  .fix-card p{font-size:14.5px;line-height:1.85;color:var(--muted);}

  /* ============ FAQ ============ */
  .faq-wrap{display:grid;gap:12px;}
  .faq-item{
    background:var(--card);border:1px solid var(--line);border-radius:14px;
    overflow:hidden;transition:box-shadow .2s var(--ease),border-color .2s var(--ease);
  }
  .faq-item.open{box-shadow:var(--sh-2);border-color:rgba(23,169,122,.4);}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    min-height:56px;padding:14px 22px;text-align:left;
    background:transparent;border:none;cursor:pointer;
    font-size:16px;font-weight:600;color:var(--ink);
    transition:background .18s var(--ease),color .18s var(--ease);
  }
  .faq-q:hover{background:var(--sand-soft);}
  .faq-q .chev{
    width:26px;height:26px;flex:none;border-radius:999px;
    background:var(--sand);color:var(--felt);
    display:grid;place-items:center;font-size:11px;
    transition:transform .24s var(--ease),background .24s var(--ease);
  }
  .faq-item.open .faq-q .chev{transform:rotate(180deg);background:var(--mint);color:#fff;}
  .faq-a{
    max-height:0;overflow:hidden;
    transition:max-height .24s var(--ease);
  }
  .faq-a p{
    padding:0 22px 20px;font-size:15px;line-height:1.9;color:var(--muted);max-width:760px;
  }

  /* ============ CTA ============ */
  .cta-band{
    position:relative;overflow:hidden;
    border-radius:24px;background:var(--felt);color:#fff;
    padding:44px 40px;margin-top:72px;
    display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;
    box-shadow:var(--sh-2);
  }
  .cta-band::before{
    content:"";position:absolute;inset:0;
    background-image:url('/assets/images/backpic/back-3.png');
    background-size:cover;background-position:center;opacity:.12;
  }
  .cta-band > *{position:relative;z-index:2;}
  .cta-band h2{font-size:clamp(21px,2.4vw,29px);font-weight:800;line-height:1.3;margin-bottom:10px;}
  .cta-band p{font-size:15px;color:rgba(243,246,244,.76);max-width:520px;line-height:1.8;}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

  /* ============ 页脚 ============ */
  .site-footer{background:var(--felt);color:rgba(243,246,244,.78);margin-top:84px;}
  .footer{padding:60px 0 26px;}
  .footer-grid{display:grid;gap:36px;grid-template-columns:1.7fr 1fr 1fr 1.1fr;}
  .footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
  .footer-brand strong{color:#fff;font-size:17px;font-weight:700;}
  .footer p{font-size:14px;line-height:1.85;color:rgba(243,246,244,.68);max-width:360px;}
  .footer h4{color:#fff;font-size:14.5px;font-weight:700;margin-bottom:16px;letter-spacing:.02em;}
  .footer ul{display:grid;gap:11px;}
  .footer ul li a,.footer ul li span{font-size:14px;color:rgba(243,246,244,.7);transition:color .18s var(--ease);}
  .footer ul li a:hover{color:#7FE3BD;text-decoration:underline;text-underline-offset:3px;}
  .footer-bottom{
    margin-top:44px;padding-top:22px;
    border-top:1px solid rgba(237,230,214,.14);
    display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
    font-size:13px;color:rgba(243,246,244,.55);
  }
  .vtag{display:inline-flex;align-items:center;gap:8px;}
  .vtag .dot{width:7px;height:7px;border-radius:999px;background:var(--mint);display:inline-block;}

  /* ============ 返回顶部 ============ */
  .to-top{
    position:fixed;right:22px;bottom:24px;z-index:70;
    width:46px;height:46px;border-radius:999px;border:none;cursor:pointer;
    background:var(--felt);color:#fff;font-size:15px;
    display:grid;place-items:center;
    box-shadow:0 14px 30px -16px rgba(14,59,44,.9);
    opacity:0;visibility:hidden;transform:translateY(10px);
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s,background .18s var(--ease);
  }
  .to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
  .to-top:hover{background:var(--mint-hover);}
  .to-top:active{transform:scale(.94);}

  /* ============ 响应式 ============ */
  @media (max-width:1180px){
    .guide-layout{grid-template-columns:minmax(0,1fr);}
    .rail{position:static;}
  }
  @media (max-width:1023px){
    .cat-hero{padding:40px 26px;border-radius:20px;margin-top:22px;}
    .sec{padding:56px 0 0;}
    .guide-main{padding:26px 22px;}
    .fix-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
    .footer-grid{grid-template-columns:1fr 1fr;}
  }
  @media (max-width:768px){
    body{font-size:15.5px;}
    .route-grid{grid-template-columns:minmax(0,1fr);}
    .fix-grid{grid-template-columns:minmax(0,1fr);}
    .article p{font-size:16px;}
    .cta-band{padding:34px 24px;border-radius:20px;}
    .article h2{font-size:21px;}
  }
  @media (max-width:640px){
    .container{padding:0 16px;}
    .cat-hero{padding:32px 20px;}
    .hero-actions .btn{width:100%;}
    .guide-main{padding:22px 16px;border-radius:14px;}
    .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px;}
    .footer{padding:44px 0 22px;}
    .faq-q{padding:14px 16px;font-size:15px;}
    .faq-a p{padding:0 16px 18px;}
    .cta-actions .btn{width:100%;}
    .to-top{right:14px;bottom:16px;}
  }
  @media (prefers-reduced-motion:reduce){
    *{animation:none !important;transition:none !important;}
  }

/* roulang page: category2 */
:root{
  --felt:#0E3B2C;
  --mint:#17A97A;
  --mint-hover:#0E8F66;
  --mint-active:#0B7353;
  --cream:#EDE6D6;
  --sand:#C9603C;
  --bg:#F6F5F1;
  --surface:#FFFFFF;
  --line:#E3E0D7;
  --text:#16211E;
  --muted:#5C6A65;
  --inverse:#F3F6F4;
  --nav-w:240px;
  --r-card:16px;
  --r-btn:12px;
  --shadow-1:0 1px 2px rgba(14,59,44,.06);
  --shadow-2:0 18px 40px -24px rgba(14,59,44,.35);
  --ease:cubic-bezier(.2,.7,.3,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16.5px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p,figure{margin:0}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}
:focus-visible{outline:2px solid var(--mint);outline-offset:2px;border-radius:6px}

/* ============ 结构骨架 ============ */
.app-shell{display:flex;align-items:flex-start;min-height:100vh}
.main-wrap{flex:1 1 auto;min-width:0;display:flex;flex-direction:column}
.container{width:100%;max-width:1280px;margin:0 auto;padding:0 24px}

/* ============ 左侧竖向导航 ============ */
.sidebar{
  flex:0 0 var(--nav-w);
  width:var(--nav-w);
  position:sticky;
  top:0;
  height:100vh;
  background:var(--felt);
  color:var(--inverse);
  display:flex;
  flex-direction:column;
  padding:22px 14px 20px;
  overflow-y:auto;
  border-right:1px solid rgba(237,230,214,.08);
}
.sidebar::-webkit-scrollbar{width:6px}
.sidebar::-webkit-scrollbar-thumb{background:rgba(237,230,214,.18);border-radius:999px}
.side-brand{display:flex;align-items:center;gap:11px;padding:4px 8px 6px;color:#fff}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:11px;
  background:var(--mint);color:#fff;display:grid;place-items:center;
  font-weight:800;font-size:17px;line-height:1;
}
.side-brand strong{display:block;font-size:15.5px;font-weight:700;line-height:1.35;letter-spacing:.01em}
.side-brand small{display:block;font-size:12.5px;color:rgba(243,246,244,.6);line-height:1.4;letter-spacing:.02em}
.nav-group-title{
  padding:20px 10px 8px;
  font-size:11.5px;
  letter-spacing:.16em;
  color:rgba(243,246,244,.42);
}
.nav-link{
  display:flex;align-items:center;gap:10px;
  height:44px;padding:0 12px;margin-bottom:3px;
  border-radius:10px;
  border-left:3px solid transparent;
  color:rgba(243,246,244,.78);
  font-size:15px;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.nav-link i{width:18px;text-align:center;font-size:14px;opacity:.85}
.nav-link:hover{background:rgba(237,230,214,.1);color:#fff}
.nav-link.active{background:var(--cream);color:var(--felt);font-weight:700;border-left-color:var(--mint)}
.nav-link.active i{opacity:1}
.side-version{
  margin-top:auto;
  margin-top:40px;
  background:rgba(237,230,214,.09);
  border:1px solid rgba(237,230,214,.16);
  border-radius:14px;
  padding:16px;
}
.sv-title{margin-top:12px;font-size:15.5px;font-weight:700;color:#fff;font-variant-numeric:tabular-nums}
.sv-meta{margin-top:4px;font-size:12.5px;color:rgba(243,246,244,.6);font-variant-numeric:tabular-nums}
.side-version .btn{margin-top:14px;height:44px;font-size:15px}

/* ============ 移动端顶栏 ============ */
.mobile-topbar{
  display:none;
  position:sticky;top:0;z-index:70;
  height:56px;align-items:center;justify-content:space-between;gap:12px;
  padding:0 16px;background:var(--felt);color:var(--inverse);
  box-shadow:0 6px 20px -14px rgba(11,20,18,.8);
}
.mobile-brand{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:700;color:#fff}
.mobile-brand .brand-mark{width:32px;height:32px;flex:0 0 32px;border-radius:9px;font-size:15px}
.menu-btn{
  width:40px;height:40px;border-radius:10px;
  background:rgba(237,230,214,.12);color:var(--inverse);
  display:grid;place-items:center;font-size:16px;
  transition:background .18s var(--ease);
}
.menu-btn:hover{background:rgba(237,230,214,.22)}
.sidebar-mask{display:none;position:fixed;inset:0;background:rgba(11,20,18,.5);z-index:75}

/* ============ 通用组件 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:52px;padding:0 26px;border-radius:var(--r-btn);
  font-size:16px;font-weight:600;line-height:1;
  transition:transform .18s var(--ease),background .18s var(--ease),box-shadow .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn:active{transform:scale(.98)}
.btn-primary{background:var(--mint);color:#fff;box-shadow:0 10px 24px -18px rgba(23,169,122,.95)}
.btn-primary:hover{background:var(--mint-hover);transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-ghost{border:1px solid var(--felt);color:var(--felt);background:transparent}
.btn-ghost:hover{background:var(--cream)}
.btn-on-dark{border:1px solid rgba(237,230,214,.42);color:var(--cream)}
.btn-on-dark:hover{background:rgba(237,230,214,.14)}
.btn-block{width:100%}

.badge{
  display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 12px;
  border-radius:999px;background:var(--cream);color:var(--felt);
  font-size:12px;font-weight:600;line-height:1;letter-spacing:.02em;
}
.badge-sand{background:var(--sand);color:#fff}
.badge-outline{background:transparent;border:1px solid rgba(14,59,44,.2);color:var(--felt)}

.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.breadcrumb a:hover{color:var(--mint)}

.section{padding:96px 0}
.section-alt{background:linear-gradient(180deg,#FBFBF8 0%,#F6F5F1 100%)}
.section-head{max-width:780px;margin-bottom:40px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.14em;font-weight:700;color:var(--mint)}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--mint);border-radius:2px}
.section-title{font-size:clamp(26px,3.1vw,34px);font-weight:700;line-height:1.28;letter-spacing:-.01em;margin-top:12px}
.section-sub{margin-top:12px;color:var(--muted);font-size:15.5px;max-width:720px}

/* ============ Hero ============ */
.page-hero{position:relative;overflow:hidden;background:var(--felt);color:var(--inverse);padding:56px 0 72px}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
  opacity:.14;pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:1.12fr .88fr;gap:52px;align-items:center}
.hero-copy .breadcrumb{color:rgba(243,246,244,.6);margin-bottom:20px}
.hero-copy .breadcrumb a:hover{color:var(--mint)}
.hero-copy .badge{background:rgba(237,230,214,.14);color:var(--cream);border:1px solid rgba(237,230,214,.22)}
.hero-title{
  margin-top:16px;
  font-size:clamp(34px,4.4vw,54px);
  line-height:1.1;
  font-weight:800;
  letter-spacing:-.02em;
}
.lead{margin-top:18px;font-size:17px;line-height:1.9;color:rgba(243,246,244,.8);max-width:640px}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.hero-badges .badge{background:rgba(237,230,214,.12);color:var(--cream);border:1px solid rgba(237,230,214,.18);font-variant-numeric:tabular-nums}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-figure{
  position:relative;border-radius:20px;overflow:hidden;
  border:1px solid rgba(237,230,214,.2);
  aspect-ratio:16/10;box-shadow:var(--shadow-2);
}
.hero-figure img{width:100%;height:100%;object-fit:cover;transition:transform .28s var(--ease)}
.hero-figure:hover img{transform:scale(1.03)}

/* ============ 平台对照 ============ */
.compare{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.compare-col{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--shadow-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.compare-col:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.compare-head{display:flex;align-items:center;gap:14px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.platform-icon{
  width:46px;height:46px;flex:0 0 46px;border-radius:13px;
  background:var(--cream);color:var(--felt);display:grid;place-items:center;font-size:20px;
}
.compare-head h3{font-size:19px;font-weight:700}
.compare-head p{font-size:13px;color:var(--muted);line-height:1.6}
.spec-list{margin-top:6px}
.spec-list li{
  display:flex;align-items:baseline;justify-content:space-between;gap:18px;
  padding:13px 0;border-bottom:1px dashed var(--line);font-size:15px;
}
.spec-list li:last-child{border-bottom:0}
.spec-list .k{color:var(--muted);flex:0 0 auto}
.spec-list .v{font-weight:600;text-align:right;font-variant-numeric:tabular-nums}

/* ============ 要求网格 ============ */
.req-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.req-card{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);padding:26px;box-shadow:var(--shadow-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.req-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(23,169,122,.45)}
.req-num{font-size:12.5px;font-weight:800;letter-spacing:.16em;color:var(--mint);font-variant-numeric:tabular-nums}
.req-card h3{margin-top:10px;font-size:19px;font-weight:600;line-height:1.4}
.req-card p{margin-top:8px;font-size:15px;color:var(--muted)}
.req-card .req-tag{
  display:inline-block;margin-top:16px;height:24px;line-height:24px;
  padding:0 12px;border-radius:999px;background:var(--cream);
  font-size:12px;font-weight:600;color:var(--felt);font-variant-numeric:tabular-nums;
}

/* ============ 版本横向滚动 ============ */
.version-row{
  display:flex;gap:20px;overflow-x:auto;
  padding:6px 4px 22px;
  scroll-snap-type:x mandatory;
  -webkit-overflow-scrolling:touch;
}
.version-row::-webkit-scrollbar{height:8px}
.version-row::-webkit-scrollbar-track{background:rgba(14,59,44,.06);border-radius:999px}
.version-row::-webkit-scrollbar-thumb{background:rgba(14,59,44,.18);border-radius:999px}
.version-card{
  flex:0 0 320px;scroll-snap-align:start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--shadow-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.version-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.version-card h3{margin-top:12px;font-size:19px;font-weight:700;font-variant-numeric:tabular-nums}
.version-date{margin-top:4px;font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.version-card ul{margin-top:16px;display:grid;gap:11px}
.version-card li{position:relative;padding-left:18px;font-size:14.5px;color:var(--muted);line-height:1.75}
.version-card li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:2px;background:var(--mint)}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:14px;max-width:920px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:14px;
  overflow:hidden;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.faq-item[open]{border-color:rgba(23,169,122,.45);box-shadow:var(--shadow-1)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:16px 22px;cursor:pointer;list-style:none;
  font-size:16.5px;font-weight:600;line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"\f078";font-family:"Font Awesome 6 Free";font-weight:900;
  font-size:12px;color:var(--mint);flex:0 0 auto;
  transition:transform .24s var(--ease);
}
.faq-item[open] summary::after{transform:rotate(180deg)}
.faq-body{padding:0 22px 20px;color:var(--muted);font-size:15.5px;max-width:760px}

/* ============ CTA ============ */
.cta-block{
  position:relative;overflow:hidden;
  background:var(--felt);border-radius:24px;
  padding:48px;display:flex;align-items:center;justify-content:space-between;gap:36px;
  color:var(--inverse);
}
.cta-block::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  opacity:.1;pointer-events:none;
}
.cta-copy{position:relative;max-width:640px}
.cta-copy h2{font-size:clamp(24px,2.8vw,32px);font-weight:700;line-height:1.3;letter-spacing:-.01em}
.cta-copy p{margin-top:12px;color:rgba(243,246,244,.78);font-size:15.5px}
.cta-actions{position:relative;display:flex;flex-wrap:wrap;gap:14px}

/* ============ 页脚 ============ */
.site-footer{margin-top:96px;background:var(--felt);color:rgba(243,246,244,.8);padding:72px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:16px;color:#fff;font-size:16px}
.site-footer h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px}
.site-footer ul li{margin-bottom:10px;font-size:14.5px;line-height:1.7}
.site-footer a{transition:color .18s var(--ease)}
.site-footer a:hover{color:var(--mint)}
.site-footer p{font-size:14.5px;line-height:1.85;max-width:420px}
.footer-bottom{
  margin-top:44px;padding-top:20px;
  border-top:1px solid rgba(237,230,214,.12);
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;
  font-size:13.5px;color:rgba(243,246,244,.62);
}
.vtag{display:inline-flex;align-items:center;gap:8px}
.dot{width:6px;height:6px;border-radius:50%;background:var(--mint);display:inline-block}

/* ============ 返回顶部 ============ */
.back-top{
  position:fixed;right:24px;bottom:24px;z-index:60;
  width:48px;height:48px;border-radius:50%;
  background:var(--felt);color:var(--cream);
  display:grid;place-items:center;font-size:15px;
  opacity:0;pointer-events:none;transform:translateY(8px);
  box-shadow:var(--shadow-2);
  transition:opacity .24s var(--ease),transform .24s var(--ease),background .18s var(--ease);
}
.back-top.show{opacity:1;pointer-events:auto;transform:translateY(0)}
.back-top:hover{background:var(--mint-active)}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .sidebar{
    position:fixed;left:0;top:0;z-index:80;
    width:272px;flex-basis:272px;height:100%;
    transform:translateX(-100%);
    transition:transform .28s var(--ease);
  }
  body.nav-open .sidebar{transform:translateX(0)}
  body.nav-open .sidebar-mask{display:block}
  .mobile-topbar{display:flex}
  .page-hero{padding:40px 0 56px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-figure{order:-1}
  .section{padding:72px 0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 18px}
  .section{padding:56px 0}
  .section-head{margin-bottom:28px}
  .compare{grid-template-columns:1fr}
  .req-grid{grid-template-columns:1fr}
  .cta-block{flex-direction:column;align-items:flex-start;padding:32px 24px;border-radius:20px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 100%}
  .hero-actions .btn{flex:1 1 100%}
  .version-card{flex:0 0 276px}
  .site-footer{margin-top:60px;padding:52px 0 24px}
  .footer-bottom{font-size:12.5px}
  .back-top{right:16px;bottom:16px;width:44px;height:44px}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .faq-item summary{font-size:15.5px;padding:14px 18px}
  .faq-body{padding:0 18px 18px;font-size:15px}
}

/* roulang page: category3 */
:root{
    --felt:#0E3B2C;
    --felt-deep:#0A2C21;
    --mint:#17A97A;
    --mint-hover:#0E8F66;
    --mint-active:#0B7353;
    --sand:#EDE6D6;
    --ember:#C9603C;
    --bg:#F6F5F1;
    --card:#FFFFFF;
    --line:#E3E0D7;
    --ink:#16211E;
    --muted:#5C6A65;
    --inverse:#F3F6F4;
    --r-card:16px;
    --r-btn:12px;
    --r-img:16px;
    --sh-1:0 1px 2px rgba(14,59,44,.06);
    --sh-2:0 18px 40px -24px rgba(14,59,44,.35);
    --ease:cubic-bezier(.2,.7,.3,1);
    --sidebar-w:240px;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--bg);
    color:var(--ink);
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
    font-size:16.5px;
    line-height:1.9;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  img{display:block;max-width:100%}
  a{color:inherit;text-decoration:none}
  button{font:inherit;color:inherit}
  h1,h2,h3,h4{margin:0;line-height:1.25}
  p{margin:0}
  ul{margin:0;padding:0;list-style:none}
  .tabular{font-variant-numeric:tabular-nums}

  :focus-visible{outline:2px solid var(--mint);outline-offset:2px;border-radius:6px}

  .app-shell{display:flex;min-height:100vh;align-items:stretch}
  .main-area{flex:1 1 auto;min-width:0;display:flex;flex-direction:column}

  .container{width:100%;max-width:1280px;margin:0 auto;padding:0 40px}

  /* ============ 侧栏导航 ============ */
  .sidebar{
    width:var(--sidebar-w);
    flex:0 0 var(--sidebar-w);
    background:var(--felt);
    color:var(--inverse);
    position:sticky;
    top:0;
    height:100vh;
    overflow-y:auto;
    padding:26px 16px 22px;
    display:flex;
    flex-direction:column;
    gap:8px;
    border-right:1px solid rgba(237,230,214,.12);
    z-index:40;
  }
  .sidebar::-webkit-scrollbar{width:6px}
  .sidebar::-webkit-scrollbar-thumb{background:rgba(237,230,214,.2);border-radius:99px}

  .sidebar-brand{display:flex;align-items:center;gap:12px;padding:4px 8px 10px}
  .brand-mark{
    width:40px;height:40px;flex:0 0 40px;border-radius:12px;
    background:var(--mint);color:#fff;display:grid;place-items:center;
    font-weight:800;font-size:18px;letter-spacing:.02em;
  }
  .brand-text{display:flex;flex-direction:column;line-height:1.35}
  .brand-text b{font-size:15px;color:#fff;font-weight:700}
  .brand-text span{font-size:12.5px;color:rgba(243,246,244,.62);letter-spacing:.02em}

  .nav-group-title{
    font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;
    color:rgba(243,246,244,.42);padding:14px 12px 6px;
  }
  .nav-link{
    display:flex;align-items:center;gap:10px;
    height:44px;padding:0 12px;border-radius:10px;
    color:rgba(243,246,244,.82);font-size:14.5px;
    border-left:3px solid transparent;
    transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
  }
  .nav-link i{width:18px;text-align:center;font-size:14px;opacity:.85}
  .nav-link:hover{background:rgba(237,230,214,.10);color:#fff}
  .nav-link.active{background:var(--sand);color:var(--felt);border-left-color:var(--mint);font-weight:600}
  .nav-link.active i{opacity:1;color:var(--mint-hover)}

  .side-card{
    margin-top:auto;
    background:rgba(237,230,214,.08);
    border:1px solid rgba(237,230,214,.16);
    border-radius:14px;
    padding:16px;
    display:grid;gap:10px;
  }
  .side-card .side-title{font-size:13.5px;color:#fff;font-weight:600}
  .side-card .side-meta{font-size:12.5px;color:rgba(243,246,244,.62);line-height:1.7}
  .btn-side{
    display:flex;align-items:center;justify-content:center;gap:8px;
    height:40px;border-radius:10px;background:var(--mint);color:#fff;
    font-size:14px;font-weight:600;transition:background .18s var(--ease),transform .18s var(--ease);
  }
  .btn-side:hover{background:var(--mint-hover);transform:translateY(-1px)}

  /* ============ 移动端顶栏与抽屉 ============ */
  .mobile-bar{
    display:none;height:56px;align-items:center;justify-content:space-between;
    padding:0 18px;background:var(--felt);color:#fff;position:sticky;top:0;z-index:50;
    border-bottom:1px solid rgba(237,230,214,.12);
  }
  .mobile-bar .mb-brand{display:flex;align-items:center;gap:10px;font-size:14.5px;font-weight:600}
  .mobile-bar .mb-brand .brand-mark{width:30px;height:30px;flex:0 0 30px;border-radius:9px;font-size:14px}
  .burger{
    width:42px;height:42px;border-radius:10px;border:1px solid rgba(237,230,214,.22);
    background:transparent;display:grid;place-items:center;cursor:pointer;transition:background .18s var(--ease);
  }
  .burger:hover{background:rgba(237,230,214,.12)}
  .overlay{
    position:fixed;inset:0;background:rgba(11,20,18,.5);opacity:0;visibility:hidden;
    transition:opacity .22s var(--ease),visibility .22s var(--ease);z-index:55;
  }
  .overlay.show{opacity:1;visibility:visible}

  /* ============ 通用标题与板块 ============ */
  .section{padding:96px 0}
  .section-head{max-width:760px;margin-bottom:42px}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    height:26px;padding:0 12px;border-radius:999px;
    background:var(--sand);color:var(--felt);
    font-size:12px;font-weight:600;letter-spacing:.04em;
  }
  .section-head h2{
    font-size:clamp(26px,3vw,34px);font-weight:700;letter-spacing:-.01em;margin-top:16px;
  }
  .section-head .lead{color:var(--muted);margin-top:14px;font-size:16.5px}

  /* ============ 面包屑 ============ */
  .breadcrumb{padding:22px 0 0;font-size:13px;color:var(--muted);display:flex;flex-wrap:wrap;gap:8px;align-items:center}
  .breadcrumb a:hover{color:var(--mint-hover)}
  .breadcrumb .sep{color:#B9B5A6}

  /* ============ Hero ============ */
  .hero{padding:38px 0 24px}
  .hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:52px;align-items:center}
  .hero h1{
    font-size:clamp(38px,5.4vw,68px);line-height:1.05;font-weight:800;
    letter-spacing:-.02em;margin:22px 0 0;
  }
  .hero h1 .accent{color:var(--mint-hover)}
  .hero .hero-sub{margin-top:22px;max-width:640px;color:var(--muted)}
  .badge-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
  .badge{
    display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 12px;
    border-radius:999px;background:var(--sand);color:var(--felt);
    font-size:12px;font-weight:600;letter-spacing:.02em;white-space:nowrap;
  }
  .badge i{font-size:11px}
  .badge-ember{background:var(--ember);color:#fff}
  .badge-outline{background:transparent;border:1px solid var(--line);color:var(--muted)}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}

  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:9px;
    height:52px;padding:0 26px;border-radius:var(--r-btn);
    font-size:16px;font-weight:600;border:1px solid transparent;cursor:pointer;
    transition:background .18s var(--ease),color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
  }
  .btn-primary{background:var(--mint);color:#fff}
  .btn-primary:hover{background:var(--mint-hover);transform:translateY(-1px);box-shadow:var(--sh-2)}
  .btn-primary:active{background:var(--mint-active);transform:scale(.98)}
  .btn-ghost{background:transparent;border-color:rgba(14,59,44,.28);color:var(--felt)}
  .btn-ghost:hover{background:var(--sand);border-color:rgba(14,59,44,.4)}
  .btn-ghost:active{transform:scale(.98)}
  .btn-light{background:#fff;color:var(--felt)}
  .btn-light:hover{background:var(--sand)}
  .btn-sm{height:42px;padding:0 18px;font-size:14px}
  .btn-block{width:100%}

  .hero-visual{position:relative}
  .media{
    border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);
    background:var(--card);box-shadow:var(--sh-1);
  }
  .media.ratio-16-10{aspect-ratio:16/10}
  .media.ratio-4-3{aspect-ratio:4/3}
  .media img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease)}
  .media:hover img{transform:scale(1.03)}
  .hero-note{
    position:absolute;left:-18px;bottom:-22px;
    background:var(--card);border:1px solid var(--line);border-radius:14px;
    box-shadow:var(--sh-2);padding:16px 18px;max-width:250px;
  }
  .hero-note strong{display:block;font-size:14px;color:var(--felt)}
  .hero-note span{display:block;font-size:12.5px;color:var(--muted);margin-top:6px;line-height:1.7}

  /* ============ 横向滚动卡带 ============ */
  .rail{
    display:grid;grid-auto-flow:column;grid-auto-columns:minmax(276px,1fr);
    gap:22px;overflow-x:auto;padding:8px 4px 22px;
    scroll-snap-type:x mandatory;
  }
  .rail::-webkit-scrollbar{height:6px}
  .rail::-webkit-scrollbar-thumb{background:#D8D4C6;border-radius:99px}
  .rail-card{
    scroll-snap-align:start;background:var(--card);border:1px solid var(--line);
    border-radius:var(--r-card);padding:24px;box-shadow:var(--sh-1);
    transition:transform .2s var(--ease),box-shadow .2s var(--ease);
  }
  .rail-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
  .rail-card h3{font-size:19px;font-weight:600;margin-top:16px}
  .rail-card p{color:var(--muted);font-size:15px;margin-top:10px}
  .rail-card .rail-meta{
    display:flex;gap:10px;align-items:center;margin-top:18px;
    padding-top:16px;border-top:1px dashed var(--line);
    font-size:12.5px;color:var(--muted);
  }
  .icon-chip{
    width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
    background:var(--sand);color:var(--felt);font-size:17px;
  }

  /* ============ 时间线 ============ */
  .timeline{position:relative;padding-left:40px;margin-top:8px}
  .timeline::before{
    content:"";position:absolute;left:13px;top:8px;bottom:14px;width:2px;
    background:linear-gradient(180deg,var(--mint) 0%,rgba(23,169,122,.15) 100%);
  }
  .step{position:relative;padding-bottom:34px}
  .step:last-child{padding-bottom:0}
  .step-dot{
    position:absolute;left:-40px;top:2px;width:28px;height:28px;border-radius:50%;
    background:var(--felt);color:#fff;display:grid;place-items:center;
    font-size:12.5px;font-weight:700;border:3px solid var(--bg);
    font-variant-numeric:tabular-nums;
  }
  .step h3{font-size:20px;font-weight:600}
  .step p{color:var(--muted);margin-top:10px;max-width:760px;font-size:15.5px}
  .step .step-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}

  /* ============ 图文分栏 ============ */
  .split{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center}
  .feature-list{display:grid;gap:16px;margin-top:26px}
  .feature-list li{display:flex;gap:14px;align-items:flex-start}
  .feature-list .fi{
    flex:0 0 28px;width:28px;height:28px;border-radius:9px;display:grid;place-items:center;
    background:rgba(23,169,122,.12);color:var(--mint-hover);font-size:13px;margin-top:4px;
  }
  .feature-list b{display:block;font-size:16px;font-weight:600}
  .feature-list span{display:block;color:var(--muted);font-size:14.5px;margin-top:4px;line-height:1.8}

  /* ============ 优先级列表 ============ */
  .rank-list{display:grid;gap:14px;margin-top:8px}
  .rank-row{
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
    padding:22px 24px;display:grid;grid-template-columns:56px minmax(0,1fr) 200px;
    gap:22px;align-items:center;box-shadow:var(--sh-1);
    transition:transform .2s var(--ease),box-shadow .2s var(--ease);
  }
  .rank-row:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
  .rank-num{
    font-size:24px;font-weight:800;color:var(--felt);letter-spacing:-.02em;
    font-variant-numeric:tabular-nums;
  }
  .rank-row h3{font-size:18px;font-weight:600}
  .rank-row p{color:var(--muted);font-size:14.5px;margin-top:8px}
  .meter-wrap{display:grid;gap:8px}
  .meter-label{display:flex;justify-content:space-between;font-size:12.5px;color:var(--muted)}
  .meter{height:6px;border-radius:999px;background:var(--sand);overflow:hidden}
  .meter > i{display:block;height:100%;border-radius:inherit;background:var(--mint)}

  /* ============ 提示卡 ============ */
  .notice{
    display:flex;gap:18px;align-items:flex-start;
    background:var(--sand);border:1px solid #E0D8C4;border-radius:var(--r-card);
    padding:26px 28px;margin-top:34px;
  }
  .notice .ni{
    flex:0 0 40px;width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
    background:var(--ember);color:#fff;font-size:17px;
  }
  .notice h3{font-size:18px;font-weight:600;color:var(--felt)}
  .notice p{color:#4A5852;font-size:15px;margin-top:8px}
  .notice ul{margin-top:12px;display:grid;gap:8px}
  .notice li{display:flex;gap:10px;font-size:14.5px;color:#4A5852}
  .notice li::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--felt);flex:0 0 6px;margin-top:11px}

  /* ============ FAQ ============ */
  .faq-wrap{margin-top:8px;display:grid;gap:12px}
  .faq-item{
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
    overflow:hidden;box-shadow:var(--sh-1);
  }
  .faq-item summary{
    list-style:none;cursor:pointer;min-height:56px;
    padding:18px 24px;display:flex;align-items:center;justify-content:space-between;gap:18px;
    font-size:17px;font-weight:600;color:var(--ink);
    transition:background .18s var(--ease);
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-item summary::after{
    content:"+";flex:0 0 auto;width:26px;height:26px;border-radius:999px;
    display:grid;place-items:center;background:var(--sand);color:var(--felt);
    font-weight:700;font-size:15px;line-height:1;transition:background .18s var(--ease);
  }
  .faq-item summary:hover{background:#FBF9F3}
  .faq-item[open] summary{background:#FBF9F3}
  .faq-item[open] summary::after{content:"–";background:var(--mint);color:#fff}
  .faq-body{padding:0 24px 22px;color:var(--muted);font-size:15.5px;max-width:900px}

  /* ============ CTA ============ */
  .cta-band{
    position:relative;overflow:hidden;border-radius:24px;
    background:linear-gradient(120deg,rgba(14,59,44,.95),rgba(10,44,33,.92)),
               url("/assets/images/backpic/back-2.png") center/cover no-repeat;
    color:var(--inverse);padding:48px;
    display:flex;flex-wrap:wrap;gap:32px;align-items:center;justify-content:space-between;
  }
  .cta-band h2{font-size:clamp(24px,2.6vw,32px);font-weight:700;letter-spacing:-.01em;color:#fff;max-width:620px}
  .cta-band p{color:rgba(243,246,244,.72);margin-top:14px;max-width:600px;font-size:15.5px}
  .cta-actions{display:flex;flex-wrap:wrap;gap:14px}

  /* ============ 页脚 ============ */
  .site-footer{background:var(--felt);color:rgba(243,246,244,.72);margin-top:96px}
  .footer{padding-top:66px;padding-bottom:28px}
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:44px}
  .footer-brand{display:flex;align-items:center;gap:12px;color:#fff;font-size:17px;font-weight:700}
  .footer-brand .brand-mark{width:36px;height:36px;flex:0 0 36px;border-radius:11px;font-size:15px}
  .footer p{font-size:14.5px;line-height:1.9;margin-top:16px;color:rgba(243,246,244,.66);max-width:420px}
  .footer h4{font-size:13px;letter-spacing:.12em;color:rgba(243,246,244,.48);font-weight:600;margin-bottom:16px}
  .footer ul{display:grid;gap:11px;font-size:14.5px}
  .footer ul a{color:rgba(243,246,244,.78);transition:color .18s var(--ease)}
  .footer ul a:hover{color:#fff}
  .footer ul span{color:rgba(243,246,244,.58);font-size:13.5px;line-height:1.8;display:block}
  .footer-bottom{
    display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center;
    border-top:1px solid rgba(237,230,214,.08);margin-top:46px;padding-top:22px;font-size:13px;
  }
  .vtag{display:inline-flex;align-items:center;gap:8px;color:rgba(243,246,244,.62)}
  .vtag .dot{width:6px;height:6px;border-radius:50%;background:var(--mint);display:inline-block}

  /* ============ 返回顶部 ============ */
  .to-top{
    position:fixed;right:26px;bottom:26px;width:46px;height:46px;border-radius:999px;
    background:var(--felt);color:#fff;border:none;display:grid;place-items:center;
    cursor:pointer;box-shadow:var(--sh-2);opacity:0;visibility:hidden;transform:translateY(10px);
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s var(--ease),background .18s var(--ease);
    z-index:45;
  }
  .to-top.show{opacity:1;visibility:visible;transform:none}
  .to-top:hover{background:var(--mint-hover)}

  /* ============ 进场动画 ============ */
  .reveal{opacity:0;transform:translateY(8px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
  .reveal.in{opacity:1;transform:none}

  /* ============ 响应式 ============ */
  @media (max-width:1439px){
    .container{max-width:1180px}
  }
  @media (max-width:1023px){
    .app-shell{display:block}
    .sidebar{
      position:fixed;left:0;top:0;height:100vh;transform:translateX(-100%);
      transition:transform .24s var(--ease);z-index:60;
    }
    .sidebar.open{transform:translateX(0)}
    .mobile-bar{display:flex}
    .container{padding:0 22px}
    .section{padding:56px 0}
    .hero{padding:26px 0 16px}
    .hero-grid{grid-template-columns:1fr;gap:36px}
    .hero-note{position:static;left:auto;bottom:auto;max-width:none;margin-top:18px}
    .split{grid-template-columns:1fr;gap:28px}
    .rank-row{grid-template-columns:44px minmax(0,1fr);gap:16px;padding:20px}
    .meter-wrap{grid-column:1 / -1}
    .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
    .site-footer{margin-top:56px}
    .cta-band{padding:34px 26px;border-radius:20px}
    .footer{padding-top:48px}
  }
  @media (max-width:767px){
    body{font-size:16px}
    .section{padding:46px 0}
    .rail{grid-auto-columns:minmax(240px,86%)}
    .timeline{padding-left:34px}
    .timeline::before{left:11px}
    .step-dot{left:-34px;width:24px;height:24px;font-size:11.5px}
    .rank-row{grid-template-columns:1fr}
    .rank-num{font-size:20px}
  }
  @media (max-width:520px){
    .container{padding:0 16px}
    .hero h1{font-size:clamp(30px,8.6vw,40px)}
    .badge-row{gap:8px}
    .hero-actions .btn{width:100%}
    .footer-grid{grid-template-columns:1fr;gap:28px}
    .footer-bottom{flex-direction:column;align-items:flex-start}
    .cta-actions .btn{width:100%}
    .to-top{right:16px;bottom:16px}
    .faq-item summary{font-size:15.5px;padding:16px 18px}
    .faq-body{padding:0 18px 18px}
  }

/* roulang page: category4 */
:root{
  --felt:#0E3B2C;
  --felt-700:#0B2F23;
  --mint:#17A97A;
  --mint-hover:#0E8F66;
  --mint-active:#0B7353;
  --sand:#EDE6D6;
  --brick:#C9603C;
  --bg:#F6F5F1;
  --card:#FFFFFF;
  --line:#E3E0D7;
  --ink:#16211E;
  --muted:#5C6A65;
  --inverse:#F3F6F4;
  --r-card:16px;
  --r-btn:12px;
  --shadow-1:0 1px 2px rgba(14,59,44,.06);
  --shadow-2:0 18px 40px -24px rgba(14,59,44,.35);
  --ease:cubic-bezier(.2,.7,.3,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.9;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--mint);outline-offset:2px;}

.skip{position:absolute;left:-9999px;top:0;background:var(--felt);color:var(--inverse);padding:10px 16px;border-radius:0 0 12px 0;z-index:200;}
.skip:focus{left:0;}

.container{width:100%;max-width:1180px;margin:0 auto;padding:0 24px;}

/* ---------- 布局骨架 ---------- */
.app{display:block;}
@media (min-width:1024px){
  .app{display:grid;grid-template-columns:240px minmax(0,1fr);align-items:start;}
}

/* ---------- 左侧竖向导航 ---------- */
.sidenav{
  position:fixed;
  top:0;left:0;
  width:280px;
  height:100vh;
  background:var(--felt);
  color:var(--inverse);
  padding:22px 16px 28px;
  overflow-y:auto;
  transform:translateX(-100%);
  transition:transform .28s var(--ease);
  z-index:60;
  border-right:1px solid rgba(237,230,214,.12);
}
.sidenav.open{transform:translateX(0);}
.brand{display:flex;align-items:center;gap:12px;padding:6px 8px 20px;}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;
  display:grid;place-items:center;
  background:var(--sand);color:var(--felt);
  border-radius:12px;font-weight:800;font-size:19px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.3;}
.brand-text strong{font-size:16px;font-weight:800;letter-spacing:-.01em;color:var(--inverse);}
.brand-text em{font-style:normal;font-size:12.5px;color:rgba(243,246,244,.66);letter-spacing:.02em;}
.nav-group-title{
  font-size:12px;letter-spacing:.14em;
  color:rgba(243,246,244,.45);
  padding:6px 12px 10px;
}
.sidenav nav{display:flex;flex-direction:column;gap:4px;}
.nav-link{
  display:flex;align-items:center;gap:10px;
  min-height:44px;padding:0 12px;
  border-radius:10px;
  font-size:14.5px;
  color:rgba(243,246,244,.8);
  border-left:3px solid transparent;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.nav-link i{width:18px;font-size:15px;text-align:center;opacity:.85;}
.nav-link:hover{background:rgba(237,230,214,.08);color:#fff;}
.nav-link.active{
  background:var(--sand);
  color:var(--felt);
  font-weight:700;
  border-left-color:var(--mint);
}
.nav-link.active i{opacity:1;}
.nav-version{
  margin-top:26px;
  background:rgba(237,230,214,.07);
  border:1px solid rgba(237,230,214,.16);
  border-radius:16px;
  padding:16px;
  display:flex;flex-direction:column;gap:6px;
}
.nav-version .badge{align-self:flex-start;}
.nav-version strong{font-size:18px;color:var(--inverse);}
.nav-version span{font-size:12.5px;color:rgba(243,246,244,.6);}
.nav-version .btn{margin-top:10px;width:100%;justify-content:center;}

/* ---------- 移动端顶栏 ---------- */
.mobile-bar{
  position:sticky;top:0;z-index:50;
  height:56px;
  display:flex;align-items:center;justify-content:space-between;
  gap:12px;
  padding:0 16px;
  background:var(--felt);
  color:var(--inverse);
  box-shadow:0 6px 18px -14px rgba(14,59,44,.9);
}
.mobile-bar .brand{padding:0;}
.mobile-bar .brand-mark{width:32px;height:32px;flex:0 0 32px;font-size:15px;border-radius:10px;}
.mobile-bar .brand-text strong{font-size:14px;}
.mobile-bar .brand-text em{font-size:11px;}
.burger{
  width:42px;height:42px;border-radius:12px;
  border:1px solid rgba(237,230,214,.28);
  background:transparent;color:var(--inverse);
  display:grid;place-items:center;cursor:pointer;
  transition:background .2s var(--ease);
}
.burger:hover{background:rgba(237,230,214,.12);}
.drawer-mask{
  position:fixed;inset:0;background:rgba(11,20,18,.5);
  opacity:0;pointer-events:none;transition:opacity .24s var(--ease);z-index:55;
}
.drawer-mask.show{opacity:1;pointer-events:auto;}

@media (min-width:1024px){
  .sidenav{position:sticky;top:0;transform:none;width:240px;height:100vh;z-index:1;}
  .mobile-bar{display:none;}
  .drawer-mask{display:none;}
}

/* ---------- 通用组件 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  font-size:15px;font-weight:600;
  cursor:pointer;
  transition:transform .2s var(--ease),background .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.btn:active{transform:scale(.98);}
.btn-primary{background:var(--mint);color:#fff;}
.btn-primary:hover{background:var(--mint-hover);transform:translateY(-1px);box-shadow:0 14px 26px -16px rgba(14,59,44,.6);}
.btn-primary:active{background:var(--mint-active);}
.btn-ghost{border-color:var(--felt);color:var(--felt);background:transparent;}
.btn-ghost:hover{background:var(--sand);transform:translateY(-1px);}
.btn-light{border-color:rgba(237,230,214,.42);color:var(--inverse);background:transparent;}
.btn-light:hover{background:var(--sand);color:var(--felt);border-color:var(--sand);}
.btn-sm{height:40px;font-size:14px;padding:0 16px;border-radius:10px;}
.text-link{
  color:var(--mint-hover);font-weight:600;
  text-decoration:underline;text-underline-offset:3px;
  transition:color .2s var(--ease);
}
.text-link:hover{color:var(--felt);}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:24px;padding:0 10px;
  border-radius:999px;
  background:var(--sand);
  color:var(--felt);
  font-size:12px;font-weight:600;
  line-height:1;
}
.badge-accent{background:var(--brick);color:#fff;}
.badge-outline{border:1px solid var(--line);background:transparent;color:var(--muted);}

.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px;
  box-shadow:var(--shadow-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--sand);color:var(--felt);
  border-radius:999px;padding:6px 14px;
  font-size:12.5px;font-weight:700;letter-spacing:.04em;
}
.sec-head{max-width:720px;margin-bottom:40px;}
.sec-head h2{font-size:clamp(24px,3vw,32px);margin-top:16px;letter-spacing:-.015em;}
.sec-head p{margin-top:14px;color:var(--muted);font-size:16.5px;}
.section{padding:96px 0;}
.section-tight{padding:64px 0;}
@media (max-width:1023px){
  .section{padding:56px 0;}
  .section-tight{padding:44px 0;}
}

.breadcrumb{
  display:flex;align-items:center;gap:8px;
  font-size:13px;color:var(--muted);
  margin-bottom:22px;flex-wrap:wrap;
}
.breadcrumb a:hover{color:var(--mint-hover);}
.breadcrumb .sep{opacity:.5;}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:72px 0 84px;background:#fff;border-bottom:1px solid var(--line);}
.hero::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  opacity:.07;
}
.hero > .container{position:relative;z-index:1;}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;}
.hero h1{
  font-size:clamp(30px,4.4vw,50px);
  line-height:1.14;
  font-weight:800;
  letter-spacing:-.02em;
  margin-top:18px;
}
.hero h1 .hl{color:var(--felt);box-shadow:inset 0 -12px 0 rgba(23,169,122,.16);}
.hero-lead{margin-top:18px;color:var(--muted);font-size:17px;max-width:620px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px;}
.hero-media{
  border-radius:20px;overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-2);
  background:var(--sand);
  aspect-ratio:16/10;
}
.hero-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.hero-media:hover img{transform:scale(1.03);}
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:34px;}
  .hero{padding:44px 0 56px;}
}

/* ---------- 横向滚动卡片条 ---------- */
.scroll-row{
  display:flex;gap:16px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding:4px 4px 14px;
  -webkit-overflow-scrolling:touch;
}
.scroll-row::-webkit-scrollbar{height:8px;}
.scroll-row::-webkit-scrollbar-thumb{background:rgba(14,59,44,.18);border-radius:999px;}
.scroll-card{
  flex:0 0 268px;
  scroll-snap-align:start;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--shadow-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.scroll-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(23,169,122,.4);}
.scroll-card .num{
  font-size:12px;font-weight:800;letter-spacing:.1em;
  color:var(--mint-hover);
}
.scroll-card h3{font-size:17px;margin-top:10px;}
.scroll-card p{margin-top:8px;color:var(--muted);font-size:14.5px;line-height:1.8;}

/* ---------- FAQ 手风琴 ---------- */
.faq-group + .faq-group{margin-top:44px;}
.faq-group-title{
  display:flex;align-items:center;gap:10px;
  font-size:14px;font-weight:700;color:var(--felt);
  letter-spacing:.06em;margin-bottom:16px;
}
.faq-group-title span.dot{width:8px;height:8px;border-radius:999px;background:var(--mint);display:inline-block;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-1);
  overflow:hidden;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.faq-item + .faq-item{margin-top:12px;}
.faq-item:hover{border-color:rgba(23,169,122,.35);}
.faq-item.open{border-color:rgba(23,169,122,.5);box-shadow:var(--shadow-2);}
.faq-h{margin:0;}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  min-height:56px;
  padding:18px 24px;
  background:transparent;border:0;
  text-align:left;font-size:17px;font-weight:600;color:var(--ink);
  cursor:pointer;font-family:inherit;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--mint-hover);}
.faq-item.open .faq-q{color:var(--felt);}
.faq-icon{
  flex:0 0 26px;width:26px;height:26px;border-radius:999px;
  background:var(--sand);color:var(--felt);
  display:grid;place-items:center;font-size:12px;
  transition:transform .24s var(--ease),background .24s var(--ease),color .24s var(--ease);
}
.faq-item.open .faq-icon{transform:rotate(45deg);background:var(--mint);color:#fff;}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .24s var(--ease);
}
.faq-a-inner{
  padding:0 24px 22px;
  color:var(--muted);
  font-size:16px;line-height:1.9;
  max-width:760px;
}

/* ---------- 安全要点 ---------- */
.safety-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
@media (max-width:768px){.safety-grid{grid-template-columns:1fr;}}
.safety-item{display:flex;gap:16px;align-items:flex-start;}
.safety-ico{
  flex:0 0 44px;width:44px;height:44px;border-radius:14px;
  background:var(--sand);color:var(--felt);
  display:grid;place-items:center;font-size:17px;
}
.safety-item h3{font-size:17px;}
.safety-item p{margin-top:8px;color:var(--muted);font-size:15px;line-height:1.85;}

/* ---------- 排查流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;counter-reset:step;}
@media (max-width:900px){.steps{grid-template-columns:1fr;}}
.step{
  position:relative;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);padding:26px;box-shadow:var(--shadow-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.step-no{
  width:38px;height:38px;border-radius:999px;
  background:var(--felt);color:var(--inverse);
  display:grid;place-items:center;font-weight:800;font-size:14px;
}
.step h3{margin-top:16px;font-size:17.5px;}
.step p{margin-top:10px;color:var(--muted);font-size:15px;line-height:1.85;}

/* ---------- 米色提示卡 ---------- */
.notice-card{
  display:flex;gap:18px;align-items:flex-start;
  background:var(--sand);
  border:1px solid #DFD5BF;
  border-radius:20px;
  padding:28px;
}
.notice-ico{
  flex:0 0 46px;width:46px;height:46px;border-radius:14px;
  background:var(--brick);color:#fff;
  display:grid;place-items:center;font-size:18px;
}
.notice-card h3{font-size:18px;color:var(--felt);}
.notice-card p{margin-top:10px;color:#4A5B54;font-size:15.5px;line-height:1.9;}

/* ---------- 底部 CTA ---------- */
.cta-inner{
  background:var(--felt);
  border-radius:24px;
  padding:48px;
  display:grid;grid-template-columns:1.2fr .8fr;gap:36px;align-items:center;
  position:relative;overflow:hidden;
  color:var(--inverse);
}
.cta-inner::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  opacity:.06;
}
.cta-inner > *{position:relative;z-index:1;}
.cta-inner h2{font-size:clamp(22px,2.6vw,30px);color:var(--inverse);}
.cta-inner p{margin-top:12px;color:rgba(243,246,244,.78);font-size:16px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end;}
@media (max-width:900px){
  .cta-inner{grid-template-columns:1fr;padding:32px 24px;}
  .cta-actions{justify-content:flex-start;}
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--felt);color:var(--inverse);padding:72px 0 28px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;}
@media (max-width:900px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px;}}
@media (max-width:560px){.footer-grid{grid-template-columns:1fr;}}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand .brand-mark{width:36px;height:36px;flex:0 0 36px;font-size:17px;border-radius:11px;}
.footer-brand strong{font-size:16.5px;color:var(--inverse);}
.site-footer p{color:rgba(243,246,244,.72);font-size:14.5px;line-height:1.9;max-width:420px;}
.site-footer h4{font-size:14px;letter-spacing:.08em;color:var(--inverse);margin-bottom:16px;}
.site-footer ul{display:flex;flex-direction:column;gap:10px;}
.site-footer ul a,.site-footer ul span{color:rgba(243,246,244,.72);font-size:14.5px;transition:color .2s var(--ease);}
.site-footer ul a:hover{color:var(--mint);}
.footer-bottom{
  margin-top:44px;padding-top:20px;
  border-top:1px solid rgba(237,230,214,.08);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:rgba(243,246,244,.58);
}
.vtag{display:inline-flex;align-items:center;gap:8px;}
.vtag .dot{width:7px;height:7px;border-radius:999px;background:var(--mint);display:inline-block;}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:22px;bottom:22px;
  width:46px;height:46px;border-radius:999px;
  background:var(--felt);color:var(--inverse);
  border:0;cursor:pointer;
  display:grid;place-items:center;font-size:16px;
  opacity:0;pointer-events:none;
  transition:opacity .24s var(--ease),transform .24s var(--ease),background .24s var(--ease);
  z-index:70;box-shadow:var(--shadow-2);
}
.to-top.show{opacity:1;pointer-events:auto;}
.to-top:hover{background:var(--mint-hover);transform:translateY(-3px);}

/* 进入视口淡入 */
.reveal{opacity:0;transform:translateY(8px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
}