/* roulang page: index */
/* ============ 设计变量 ============ */
:root{
  --bg-base:#070C16;
  --bg-panel:#0D1626;
  --bg-panel-2:#121F35;
  --bg-deep:#050910;
  --glass:rgba(18,32,54,.66);
  --line:rgba(120,180,220,.14);
  --line-hover:rgba(31,227,194,.42);
  --brand:#1FE3C2;
  --accent:#FF6A2B;
  --cool:#2B7BFF;
  --danger:#FF4D6D;
  --text-1:#F2F7FF;
  --text-2:#A9B8CE;
  --text-3:#6E809A;
  --r-xl:20px;
  --r-lg:18px;
  --r-md:14px;
  --r-sm:8px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.8), inset 0 1px 0 rgba(255,255,255,.06);
  --shadow-soft:0 14px 32px -22px rgba(0,0,0,.85);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:ui-monospace,"JetBrains Mono","Roboto Mono",Menlo,Consolas,monospace;
}

/* ============ 基础重置 ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--text-1);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:radial-gradient(70% 45% at 50% 0%,rgba(31,227,194,.06),transparent 70%);
}
img{max-width:100%;display:block;border-style:none}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
button,input{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding-left:1.25em}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
::selection{background:rgba(31,227,194,.28)}

/* ============ 背景纹理 ============ */
.bg-grid{
  position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:
    linear-gradient(rgba(120,180,220,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,180,220,.05) 1px,transparent 1px);
  background-size:44px 44px;
  -webkit-mask-image:radial-gradient(85% 60% at 50% 0%,#000 0%,transparent 100%);
  mask-image:radial-gradient(85% 60% at 50% 0%,#000 0%,transparent 100%);
}

/* ============ 容器 ============ */
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px;position:relative;z-index:1}

/* ============ 导航 ============ */
.site-header{position:sticky;top:0;z-index:60;padding:16px 0 10px}
.nav-panel{
  display:flex;align-items:center;gap:18px;
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border:1px solid var(--line);
  border-radius:var(--r-xl);
  padding:12px 16px;
  box-shadow:var(--shadow-card);
  transition:padding .28s var(--ease),background .28s var(--ease),box-shadow .28s var(--ease);
}
.site-header.is-scrolled .nav-panel{
  padding:8px 14px;
  background:rgba(9,17,30,.92);
  box-shadow:0 20px 44px -26px rgba(0,0,0,.95);
}
.brand{display:flex;align-items:center;gap:12px;flex:none;color:var(--text-1)}
.brand:hover{text-decoration:none}
.brand-mark{
  width:42px;height:42px;border-radius:13px;display:grid;place-items:center;flex:none;
  background:linear-gradient(160deg,rgba(31,227,194,.24),rgba(43,123,255,.1));
  border:1px solid rgba(31,227,194,.42);
  box-shadow:inset 0 0 0 1px rgba(31,227,194,.1),0 10px 24px -14px rgba(31,227,194,.65);
}
.brand-mark svg{width:18px;height:18px;fill:var(--brand)}
.brand-name{display:block;font-size:15px;font-weight:700;line-height:1.3}
.brand-sub{display:block;font-size:11px;color:var(--text-3);line-height:1.5;letter-spacing:.05em}
.nav-cards{display:flex;align-items:center;gap:8px;flex:1;justify-content:center}
.nav-card{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 13px;border-radius:12px;border:1px solid transparent;
  color:var(--text-2);font-size:14px;white-space:nowrap;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.nav-card svg{width:17px;height:17px;stroke:var(--text-3);fill:none;stroke-width:1.6;transition:stroke .22s var(--ease)}
.nav-card:hover{background:var(--bg-panel-2);border-color:var(--line);color:var(--text-1);text-decoration:none}
.nav-card:hover svg{stroke:var(--brand)}
.nav-card.is-active{background:var(--bg-panel-2);border-color:var(--line-hover);color:var(--text-1)}
.nav-card.is-active svg{stroke:var(--brand)}
.nav-actions{display:flex;align-items:center;gap:10px;flex:none}
.icon-btn{
  width:42px;height:42px;border-radius:50%;display:grid;place-items:center;
  border:1px solid var(--line);background:rgba(255,255,255,.03);
  transition:border-color .22s var(--ease),background .22s var(--ease);
}
.icon-btn svg{width:18px;height:18px;stroke:var(--text-2);fill:none;stroke-width:1.6}
.icon-btn:hover{border-color:var(--line-hover);background:var(--bg-panel-2)}
.icon-btn:hover svg{stroke:var(--brand)}
.nav-toggle{display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);place-items:center;background:rgba(255,255,255,.03)}
.nav-toggle span{display:block;width:17px;height:1.6px;background:var(--text-2);margin:3.5px 0;border-radius:2px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:999px;border:1px solid transparent;
  font-size:14px;font-weight:600;letter-spacing:.02em;white-space:nowrap;
  transition:background .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease),transform .18s var(--ease),filter .22s var(--ease);
}
.btn:hover{text-decoration:none}
.btn:active{transform:translateY(1px)}
.btn:disabled{opacity:.45;box-shadow:none;cursor:not-allowed;filter:none;transform:none}
.btn-primary{
  background:var(--accent);color:#231003;
  box-shadow:0 0 0 1px rgba(255,106,43,.5),0 12px 30px -12px rgba(255,106,43,.45);
}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 1px rgba(255,106,43,.72),0 16px 34px -12px rgba(255,106,43,.6)}
.btn-primary:active{box-shadow:0 0 0 1px rgba(255,106,43,.4),0 6px 16px -10px rgba(255,106,43,.4)}
.btn-brand{
  background:rgba(31,227,194,.14);color:var(--brand);border-color:rgba(31,227,194,.44);
  box-shadow:0 0 0 1px rgba(31,227,194,.16),0 12px 30px -14px rgba(31,227,194,.5);
}
.btn-brand:hover{background:rgba(31,227,194,.22);box-shadow:0 0 0 1px rgba(31,227,194,.5),0 16px 34px -14px rgba(31,227,194,.6)}
.btn-ghost{background:rgba(255,255,255,.03);border-color:var(--line);color:var(--text-1)}
.btn-ghost:hover{border-color:var(--line-hover);background:var(--bg-panel-2)}
.btn-sm{padding:9px 16px;font-size:13px}

/* ============ 通用板块 ============ */
.section{padding:96px 0 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px;flex-wrap:wrap}
.section-title{font-size:clamp(23px,2.6vw,32px);line-height:1.3;font-weight:700}
.section-desc{margin-top:8px;font-size:14px;color:var(--text-3);max-width:620px}
.text-link{font-size:14px;color:var(--brand);display:inline-flex;align-items:center;gap:6px}
.text-link:hover{text-decoration:underline;text-underline-offset:3px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.16em;
  color:var(--brand);text-transform:uppercase;font-weight:600;margin-bottom:12px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--brand);opacity:.7}

/* ============ 徽章 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 9px;border-radius:6px;font-size:12px;font-weight:500;letter-spacing:.04em;
  border:1px solid var(--line);color:var(--text-2);background:rgba(13,22,38,.8);
}
.badge-live{color:var(--brand);border-color:rgba(31,227,194,.45);background:rgba(31,227,194,.12)}
.badge-soon{color:var(--accent);border-color:rgba(255,106,43,.42);background:rgba(255,106,43,.12)}
.badge-replay{color:#7FB6FF;border-color:rgba(43,123,255,.42);background:rgba(43,123,255,.14)}
.badge-cat{color:var(--text-2)}
.dot-live{width:7px;height:7px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 0 rgba(31,227,194,.6);animation:breathe 1.6s infinite}
@keyframes breathe{
  0%{box-shadow:0 0 0 0 rgba(31,227,194,.55)}
  70%{box-shadow:0 0 0 8px rgba(31,227,194,0)}
  100%{box-shadow:0 0 0 0 rgba(31,227,194,0)}
}

/* ============ Hero ============ */
.hero{padding:34px 0 0}
.hero-grid{display:grid;grid-template-columns:58fr 42fr;gap:26px;align-items:stretch}
.hero-media{
  position:relative;aspect-ratio:16/9;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);background:var(--bg-panel);box-shadow:var(--shadow-card);
}
.hero-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,12,22,.05) 0%,rgba(7,12,22,.35) 55%,rgba(7,12,22,.9) 100%);
}
.hero-media:hover img{transform:scale(1.04)}
.media-badge{position:absolute;top:16px;left:16px;z-index:3;background:rgba(7,12,22,.72);backdrop-filter:blur(8px)}
.media-corner{
  position:absolute;right:16px;bottom:16px;z-index:3;
  font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:13px;color:var(--text-1);background:rgba(7,12,22,.75);
  border:1px solid var(--line);border-radius:8px;padding:5px 10px;letter-spacing:.05em;
}
.play-btn{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);z-index:3;
  width:64px;height:64px;border-radius:50%;display:grid;place-items:center;
  background:rgba(7,12,22,.42);border:1px solid rgba(31,227,194,.75);
  backdrop-filter:blur(6px);
  box-shadow:0 0 0 1px rgba(31,227,194,.25),0 18px 36px -16px rgba(31,227,194,.7);
  transition:transform .22s var(--ease),background .22s var(--ease);
}
.play-btn svg{width:22px;height:22px;fill:var(--brand);margin-left:3px}
.play-btn:hover{transform:translate(-50%,-50%) scale(1.06);background:rgba(31,227,194,.18)}

.hero-info{
  display:flex;flex-direction:column;gap:20px;
  padding:28px;border-radius:var(--r-xl);
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border:1px solid var(--line);box-shadow:var(--shadow-card);
}
.hero h1{font-size:clamp(28px,3.4vw,42px);line-height:1.22;font-weight:700;letter-spacing:-.01em}
.hero-sub{font-size:15px;color:var(--text-2);line-height:1.75}

.countdown{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.cd-cell{
  display:flex;flex-direction:column;align-items:center;gap:4px;min-width:78px;padding:12px 12px 10px;
  border-radius:var(--r-md);background:var(--glass);border:1px solid var(--line);
}
.cd-num{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:clamp(26px,3vw,34px);font-weight:700;line-height:1;color:var(--accent);letter-spacing:.02em}
.cd-label{font-size:11px;color:var(--text-3);letter-spacing:.14em}
.cd-sep{font-family:var(--mono);font-size:24px;color:var(--text-3)}
.cd-live{display:inline-flex;align-items:center;gap:9px;font-size:15px;font-weight:600;color:var(--brand)}

.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-meta{display:flex;gap:22px;flex-wrap:wrap;list-style:none;padding:0;border-top:1px solid var(--line);padding-top:16px}
.hero-meta li{font-size:13px;color:var(--text-3);display:flex;flex-direction:column;gap:2px}
.hero-meta strong{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:15px;color:var(--text-1);font-weight:600}

/* ============ 今日预告轨道 ============ */
.track-wrap{position:relative}
.track-wrap::before,.track-wrap::after{
  content:"";position:absolute;top:0;bottom:18px;width:56px;z-index:4;pointer-events:none;
}
.track-wrap::before{left:0;background:linear-gradient(90deg,var(--bg-base),rgba(7,12,22,0))}
.track-wrap::after{right:0;background:linear-gradient(270deg,var(--bg-base),rgba(7,12,22,0))}
.track{display:flex;gap:16px;overflow-x:auto;padding:4px 0 18px;scroll-snap-type:x mandatory;scrollbar-width:none}
.track::-webkit-scrollbar{display:none}
.track-card{
  flex:0 0 296px;scroll-snap-align:start;
  display:flex;flex-direction:column;gap:12px;padding:18px;
  background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow-soft);
  transition:transform .22s var(--ease),border-color .22s var(--ease);
}
.track-card:hover{transform:translateY(-4px);border-color:var(--line-hover)}
.track-time{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:13px;color:var(--brand);letter-spacing:.06em}
.track-thumb{position:relative;border-radius:var(--r-md);overflow:hidden;aspect-ratio:16/9;border:1px solid var(--line)}
.track-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s var(--ease)}
.track-card:hover .track-thumb img{transform:scale(1.04)}
.track-title{font-size:16px;font-weight:600;line-height:1.5}
.track-note{font-size:13px;color:var(--text-3)}
.track-state{display:flex;align-items:center;justify-content:space-between;gap:10px}
.track-nav{display:flex;gap:8px}
.track-btn{
  width:38px;height:38px;border-radius:50%;display:grid;place-items:center;
  border:1px solid var(--line);background:rgba(255,255,255,.03);
  transition:border-color .22s var(--ease),background .22s var(--ease);
}
.track-btn svg{width:16px;height:16px;stroke:var(--text-2);fill:none;stroke-width:1.8}
.track-btn:hover{border-color:var(--line-hover);background:var(--bg-panel-2)}
.track-btn:hover svg{stroke:var(--brand)}

/* ============ 看点列表 ============ */
.points-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 22px}
.point{
  display:flex;gap:14px;align-items:flex-start;padding:16px 18px;
  background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--r-md);
  transition:transform .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease);
}
.point:hover{transform:translateY(-4px);border-color:var(--line-hover);background:var(--bg-panel-2)}
.point-num{
  flex:none;width:28px;height:28px;border-radius:8px;display:grid;place-items:center;
  border:1px solid rgba(31,227,194,.5);background:rgba(31,227,194,.06);
  font-family:var(--mono);font-size:12.5px;color:var(--brand);font-variant-numeric:tabular-nums;
}
.point-text{font-size:15px;color:var(--text-1);line-height:1.7}
.point-text small{display:block;font-size:12.5px;color:var(--text-3);line-height:1.7}

/* ============ 提醒订阅 ============ */
.subscribe-card{
  padding:32px;border-radius:var(--r-xl);
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border:1px solid var(--line);box-shadow:var(--shadow-card);
}
.sub-lead{font-size:15px;color:var(--text-2);max-width:640px;margin-bottom:22px}
.sub-form{display:flex;gap:12px;flex-wrap:wrap}
.sub-input{
  flex:1;min-width:240px;padding:13px 16px;border-radius:12px;
  background:rgba(7,12,22,.72);border:1px solid var(--line);color:var(--text-1);
  font-size:15px;transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.sub-input::placeholder{color:var(--text-3)}
.sub-input:focus{border-color:var(--brand);outline:none;box-shadow:0 0 0 3px rgba(31,227,194,.14)}
.sub-input.is-error{border-color:var(--danger);box-shadow:0 0 0 3px rgba(255,77,109,.14)}
.sub-msg{margin-top:12px;font-size:13px;display:none}
.sub-msg.is-ok{display:block;color:var(--brand)}
.sub-msg.is-error{display:block;color:var(--danger)}
.platform-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:24px}
.platform{
  display:flex;flex-direction:column;align-items:center;gap:8px;padding:16px 10px;
  border-radius:var(--r-md);border:1px solid var(--line);background:rgba(13,22,38,.7);
  font-size:13px;color:var(--text-2);text-align:center;
  transition:transform .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
}
.platform svg{width:20px;height:20px;stroke:var(--text-3);fill:none;stroke-width:1.6;transition:stroke .22s var(--ease)}
.platform:hover{transform:translateY(-4px);border-color:var(--line-hover);color:var(--text-1);text-decoration:none}
.platform:hover svg{stroke:var(--brand)}
.sub-privacy{margin-top:18px;font-size:12px;color:var(--text-3)}

/* ============ 回放 bento ============ */
.replay-grid{display:grid;grid-template-columns:1.45fr 1fr 1fr;gap:18px}
.replay-card{
  position:relative;display:flex;flex-direction:column;gap:12px;padding:16px;
  background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow-soft);color:var(--text-1);
  transition:transform .22s var(--ease),border-color .22s var(--ease);
}
.replay-card:hover{transform:translateY(-4px);border-color:var(--line-hover);text-decoration:none}
.replay-thumb{position:relative;border-radius:var(--r-md);overflow:hidden;aspect-ratio:16/9;border:1px solid var(--line)}
.replay-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s var(--ease)}
.replay-card:hover .replay-thumb img{transform:scale(1.04)}
.duration{
  position:absolute;right:10px;bottom:10px;
  font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:12px;
  padding:3px 7px;border-radius:6px;background:rgba(7,12,22,.82);
  border:1px solid var(--line);color:var(--text-1);letter-spacing:.04em;
}
.replay-title{font-size:16px;font-weight:600;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.replay-meta{font-size:12.5px;color:var(--text-3);font-family:var(--mono);font-variant-numeric:tabular-nums}

/* ============ 最新信息（CMS） ============ */
.posts-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px}
.post-card{
  display:flex;flex-direction:column;justify-content:space-between;gap:16px;
  padding:22px;background:var(--bg-panel);border:1px solid var(--line);border-radius:16px;
  color:var(--text-1);box-shadow:var(--shadow-soft);
  transition:transform .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease);
}
.post-card:hover{transform:translateY(-4px);border-color:var(--line-hover);background:var(--bg-panel-2);text-decoration:none}
.post-title{
  font-size:17px;font-weight:600;line-height:1.6;margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-sum{
  font-size:14px;color:var(--text-2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.post-foot{display:flex;align-items:center;gap:12px;padding-top:14px;border-top:1px solid var(--line)}
.post-time{font-size:12.5px;color:var(--text-3);font-family:var(--mono);font-variant-numeric:tabular-nums}
.post-arrow{margin-left:auto;color:var(--brand);transition:transform .22s var(--ease)}
.post-card:hover .post-arrow{transform:translateX(4px)}
.empty-state{
  display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:52px 24px;text-align:center;
  background:var(--bg-panel);border:1px dashed var(--line);border-radius:16px;
}
.empty-icon{
  width:46px;height:46px;border-radius:50%;display:grid;place-items:center;
  border:1px solid var(--line);color:var(--text-3);font-family:var(--mono);font-size:18px;
}
.empty-state p{color:var(--text-2);font-size:15px}

/* ============ 分类入口 ============ */
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.cat-card{
  display:flex;flex-direction:column;gap:12px;padding:16px;
  background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--r-lg);
  color:var(--text-1);box-shadow:var(--shadow-soft);
  transition:transform .22s var(--ease),border-color .22s var(--ease);
}
.cat-card:hover{transform:translateY(-4px);border-color:var(--line-hover);text-decoration:none}
.cat-thumb{border-radius:var(--r-md);overflow:hidden;aspect-ratio:16/10;border:1px solid var(--line)}
.cat-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s var(--ease)}
.cat-card:hover .cat-thumb img{transform:scale(1.04)}
.cat-name{font-size:15.5px;font-weight:600;line-height:1.5;display:flex;align-items:center;gap:8px}
.cat-name svg{width:18px;height:18px;stroke:var(--brand);fill:none;stroke-width:1.6;flex:none}
.cat-note{font-size:13px;color:var(--text-3);line-height:1.7}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{
  border-radius:var(--r-md);overflow:hidden;
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border:1px solid var(--line);
  transition:box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.faq-item.is-open{box-shadow:inset 3px 0 0 var(--brand),var(--shadow-soft);border-color:var(--line-hover)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;text-align:left;font-size:16px;font-weight:600;color:var(--text-1);
}
.faq-icon{
  flex:none;width:22px;height:22px;border-radius:6px;display:grid;place-items:center;
  border:1px solid var(--line);color:var(--brand);font-size:14px;line-height:1;
  transition:transform .22s var(--ease);
}
.faq-item.is-open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
.faq-item.is-open .faq-a{max-height:340px}
.faq-a p{padding:0 22px 20px;font-size:14.5px;color:var(--text-2);line-height:1.85;max-width:820px}

/* ============ 底部 CTA ============ */
.cta-band{
  margin-top:96px;padding:44px;border-radius:var(--r-xl);
  background:linear-gradient(160deg,rgba(18,32,54,.92),rgba(13,22,38,.92));
  border:1px solid var(--line);box-shadow:var(--shadow-card);
  display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(21px,2.4vw,28px);line-height:1.35;font-weight:700}
.cta-band p{margin-top:8px;font-size:14px;color:var(--text-3);max-width:520px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ============ 页脚 ============ */
.site-footer{margin-top:96px;background:var(--bg-deep);border-top:1px solid var(--line);padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand .brand-name{font-size:15px}
.footer-about{font-size:13.5px;color:var(--text-2);line-height:1.85;max-width:340px}
.footer-col h4{font-size:14px;font-weight:600;margin-bottom:16px;color:var(--text-1)}
.footer-col ul{list-style:none;padding:0;display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--text-2)}
.footer-col a:hover{color:var(--brand)}
.footer-links-inline{display:flex;flex-wrap:wrap;gap:8px 14px;margin-top:16px}
.footer-sub{display:flex;gap:8px;margin-top:14px;flex-wrap:wrap}
.footer-sub input{
  flex:1;min-width:150px;padding:10px 13px;border-radius:10px;font-size:13.5px;
  background:rgba(7,12,22,.9);border:1px solid var(--line);color:var(--text-1);
}
.footer-sub input::placeholder{color:var(--text-3)}
.footer-sub input:focus{border-color:var(--brand);outline:none}
.footer-bottom{
  margin-top:44px;padding:20px 0;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-3)}
.footer-bottom a:hover{color:var(--brand)}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .container{padding:0 24px}
  .nav-card{padding:8px 11px;font-size:13.5px}
  .hero-grid{gap:22px}
  .cd-cell{min-width:70px;padding:11px 10px 9px}
  .cd-num{font-size:29px}
  .post-card,.track-card{padding:18px}
}
@media (max-width:1023px){
  .section{padding:64px 0 0}
  .hero{padding:24px 0 0}
  .hero-grid{grid-template-columns:1fr}
  .cat-grid{grid-template-columns:repeat(2,1fr)}
  .replay-grid{grid-template-columns:1fr 1fr}
  .replay-card:first-child{grid-column:1 / -1}
  .footer-grid{grid-template-columns:1fr 1fr}
  .cta-band{padding:32px}
}
@media (max-width:768px){
  .container{padding:0 16px}
  .site-header{padding:10px 0 6px}
  .nav-panel{gap:12px}
  .nav-toggle{display:grid}
  .nav-cards{
    position:fixed;left:16px;right:16px;top:80px;z-index:70;
    display:grid;grid-template-columns:1fr 1fr;gap:8px;
    padding:14px;border-radius:var(--r-lg);
    background:rgba(11,20,35,.98);
    backdrop-filter:blur(16px);
    border:1px solid var(--line);box-shadow:0 26px 54px -28px rgba(0,0,0,.95);
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
  }
  .nav-cards.is-open{opacity:1;visibility:visible;transform:none}
  .nav-card{justify-content:flex-start;padding:11px 12px;background:rgba(18,32,54,.7)}
  .brand-sub{display:none}
  .nav-actions .btn{display:none}
  .section{padding:48px 0 0}
  .points-grid{grid-template-columns:1fr}
  .platform-grid{grid-template-columns:repeat(2,1fr)}
  .track{flex-direction:column;overflow:visible;padding-bottom:4px}
  .track-card{flex:1 1 auto;width:100%}
  .track-wrap::before,.track-wrap::after{display:none}
  .track-nav{display:none}
  .replay-grid{grid-template-columns:1fr}
  .subscribe-card{padding:22px}
  .cta-band{margin-top:56px;padding:26px 20px;flex-direction:column;align-items:flex-start}
  .site-footer{margin-top:56px;padding-top:44px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .hero-info{padding:22px}
}
@media (max-width:480px){
  .cat-grid{grid-template-columns:1fr}
  .cd-cell{min-width:64px;padding:9px 8px 8px}
  .cd-num{font-size:24px}
  .cd-label{font-size:10px;letter-spacing:.08em}
  .cd-sep{font-size:18px}
  .faq-q{padding:16px}
  .faq-a p{padding:0 16px 18px}
  .cta-actions .btn,.hero-cta .btn{width:100%}
  .hero-meta{gap:16px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* roulang page: article */
:root{
  --bg-base:#070C16;
  --bg-panel:#0D1626;
  --bg-panel-2:#121F35;
  --glass:rgba(18,32,54,.66);
  --line:rgba(120,180,220,.14);
  --line-hover:rgba(31,227,194,.42);
  --brand:#1FE3C2;
  --accent:#FF6A2B;
  --cool:#2B7BFF;
  --text-1:#F2F7FF;
  --text-2:#A9B8CE;
  --text-3:#6E809A;
  --danger:#FF4D6D;
  --r-lg:20px;
  --r-md:14px;
  --r-sm:10px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.8), inset 0 1px 0 rgba(255,255,255,.06);
  --ease:cubic-bezier(.2,.7,.3,1);
  --mono:ui-monospace,"JetBrains Mono","Roboto Mono",Consolas,monospace;
  --sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  color:var(--text-2);
  background-color:var(--bg-base);
  background-image:
    repeating-linear-gradient(0deg,rgba(120,180,220,.045) 0 1px,transparent 1px 44px),
    repeating-linear-gradient(90deg,rgba(120,180,220,.045) 0 1px,transparent 1px 44px),
    radial-gradient(1200px 620px at 50% -10%,rgba(31,227,194,.07),transparent 62%);
  background-attachment:fixed;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease)}
a:hover{text-decoration:underline;text-underline-offset:3px}
h1,h2,h3,h4{color:var(--text-1);margin:0;line-height:1.3;font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button,input{font-family:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}
svg{width:100%;height:100%;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}

/* ---------- header / nav ---------- */
.site-header{position:sticky;top:0;z-index:60;padding:14px 0 8px;background:linear-gradient(180deg,rgba(7,12,22,.94),rgba(7,12,22,.58) 72%,rgba(7,12,22,0));backdrop-filter:blur(8px)}
.site-header.is-scrolled{padding:8px 0 6px;background:rgba(7,12,22,.96);border-bottom:1px solid var(--line)}
.nav-panel{
  display:flex;align-items:center;gap:18px;
  padding:12px 16px;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow-card);
}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;color:var(--text-1)}
.brand:hover{text-decoration:none}
.brand-mark{width:38px;height:38px;flex:0 0 38px;display:grid;place-items:center;border-radius:12px;background:linear-gradient(150deg,rgba(31,227,194,.22),rgba(43,123,255,.16));border:1px solid var(--line-hover);color:var(--brand)}
.brand-mark svg{width:20px;height:20px;fill:var(--brand);stroke:none}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-name{font-size:15px;font-weight:700;color:var(--text-1);letter-spacing:.01em}
.brand-sub{font-size:11px;color:var(--text-3);letter-spacing:.06em}
.nav-cards{display:flex;align-items:center;gap:8px;flex:1 1 auto;min-width:0;overflow:hidden}
.nav-card{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 13px;font-size:13.5px;color:var(--text-2);
  background:rgba(18,32,54,.5);border:1px solid var(--line);border-radius:12px;
  white-space:nowrap;transition:all .22s var(--ease);
}
.nav-card svg{width:18px;height:18px;stroke:var(--text-3);transition:stroke .22s var(--ease)}
.nav-card:hover,.nav-card:focus-visible{background:var(--bg-panel-2);color:var(--text-1);text-decoration:none;border-color:var(--line-hover);transform:translateY(-2px)}
.nav-card:hover svg{stroke:var(--brand)}
.nav-card.is-active{color:var(--text-1);border-color:var(--line-hover);background:var(--bg-panel-2)}
.nav-card.is-active svg{stroke:var(--brand)}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;font-size:14px;font-weight:600;letter-spacing:.02em;
  border-radius:999px;border:1px solid transparent;cursor:pointer;
  transition:all .22s var(--ease);text-decoration:none;
}
.btn:hover{text-decoration:none;filter:brightness(1.08)}
.btn:active{transform:translateY(1px);filter:brightness(.98)}
.btn-primary{background:linear-gradient(120deg,var(--accent),#ff8b52);color:#160B04;box-shadow:0 12px 30px -12px rgba(255,106,43,.5)}
.btn-brand{background:linear-gradient(120deg,var(--brand),#54f2d6);color:#04201A;box-shadow:0 0 0 1px rgba(31,227,194,.5),0 12px 30px -12px rgba(31,227,194,.45)}
.btn-ghost{background:rgba(18,32,54,.6);border-color:var(--line);color:var(--text-1)}
.btn-ghost:hover{border-color:var(--line-hover);color:var(--brand)}
.btn-sm{padding:9px 16px;font-size:13px}
.icon-btn{width:40px;height:40px;display:grid;place-items:center;border-radius:12px;background:rgba(18,32,54,.6);border:1px solid var(--line);color:var(--text-2);cursor:pointer;transition:all .22s var(--ease)}
.icon-btn svg{width:19px;height:19px}
.icon-btn:hover{color:var(--brand);border-color:var(--line-hover)}
.nav-toggle{display:none;width:40px;height:40px;border-radius:12px;background:rgba(18,32,54,.6);border:1px solid var(--line);cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:4px}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text-2);transition:all .22s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- breadcrumb ---------- */
.crumbs{padding:26px 0 4px;font-size:13px;color:var(--text-3);display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.crumbs a{color:var(--text-2);font-weight:500}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{color:var(--text-3)}
.crumbs .cur{color:var(--text-3);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- article head ---------- */
.article-head{padding:20px 0 26px;border-bottom:1px solid var(--line);margin-bottom:34px}
.badge{display:inline-flex;align-items:center;gap:7px;font-size:12px;font-weight:500;letter-spacing:.04em;padding:5px 11px;border-radius:6px;line-height:1;border:1px solid var(--line)}
.badge-live{color:var(--brand);border-color:var(--line-hover);background:rgba(31,227,194,.08)}
.badge-dot{width:6px;height:6px;border-radius:50%;background:var(--brand);animation:breathe 1.6s ease-in-out infinite}
@keyframes breathe{0%,100%{opacity:.35;transform:scale(.85)}50%{opacity:1;transform:scale(1.15)}}
.badge-cool{color:#9CC2FF;border-color:rgba(43,123,255,.4);background:rgba(43,123,255,.1)}
.badge-plain{color:var(--text-2);background:rgba(18,32,54,.6)}
.article-head h1{font-size:clamp(30px,4.2vw,44px);line-height:1.22;margin:16px 0 18px;max-width:22ch}
.meta-row{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:13.5px;color:var(--text-3);align-items:center}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:var(--text-3);opacity:.6}
.meta-num{font-family:var(--mono);font-variant-numeric:tabular-nums;color:var(--text-2)}

/* ---------- cover ---------- */
.cover-figure{margin:0 0 42px;border-radius:16px;overflow:hidden;border:1px solid var(--line);background:var(--bg-panel);box-shadow:var(--shadow-card)}
.cover-figure img{width:100%;aspect-ratio:16/9;object-fit:cover}
.cover-figure figcaption{padding:12px 18px;font-size:13px;color:var(--text-3);border-top:1px solid var(--line)}

/* ---------- layout ---------- */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:56px;align-items:start;padding-bottom:8px}
.article-main{min-width:0;max-width:800px}

/* ---------- article typography ---------- */
.article-body{font-size:17px;line-height:1.9;color:#C6D3E4}
.article-body>*+*{margin-top:1.2em}
.article-body p{margin:0 0 1.2em;color:#C6D3E4}
.article-body h2{
  font-size:clamp(24px,2.6vw,32px);line-height:1.3;margin:2.2em 0 .8em;
  padding-left:20px;border-left:4px solid var(--brand);color:var(--text-1);
}
.article-body h3{font-size:21px;line-height:1.4;font-weight:600;margin:1.8em 0 .6em;color:var(--text-1)}
.article-body h4{font-size:17px;font-weight:600;margin:1.5em 0 .5em;color:var(--text-1)}
.article-body strong{color:var(--text-1)}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(31,227,194,.35)}
.article-body a:hover{border-bottom-color:var(--brand);text-decoration:none}
.article-body ul,.article-body ol{padding-left:1.4em;margin:0 0 1.2em;list-style:revert}
.article-body li{margin:.45em 0}
.article-body li::marker{color:var(--brand)}
.article-body blockquote{
  margin:1.6em 0;padding:20px 24px;border-radius:var(--r-md);
  background:var(--glass);border:1px solid var(--line);backdrop-filter:blur(14px) saturate(140%);
  color:var(--text-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:14px;margin:1.6em 0 .6em;width:100%}
.article-body figure{margin:1.6em 0}
.article-body figcaption{font-size:13px;color:var(--text-3);text-align:center}
.article-body code{
  font-family:var(--mono);font-size:.92em;background:#0A1220;border:1px solid var(--line);
  padding:2px 6px;border-radius:6px;color:var(--brand);
}
.article-body pre{
  background:#0A1220;border:1px solid var(--line);border-radius:10px;padding:18px 20px;
  overflow-x:auto;font-family:var(--mono);font-size:14px;line-height:1.7;color:#C6D3E4;
}
.article-body pre code{background:none;border:0;padding:0;color:inherit}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;margin:1.6em 0;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.article-body th,.article-body td{padding:11px 14px;border-bottom:1px solid var(--line);text-align:left}
.article-body th{background:var(--bg-panel-2);color:var(--text-1);font-weight:600}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.4em 0}

/* ---------- empty state ---------- */
.empty-state{background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--r-lg);padding:44px 28px;text-align:center;box-shadow:var(--shadow-card)}
.empty-state .empty-ico{width:56px;height:56px;margin:0 auto 16px;display:grid;place-items:center;border-radius:16px;border:1px solid var(--line-hover);color:var(--brand)}
.empty-state .empty-ico svg{width:26px;height:26px}
.empty-state h2{font-size:21px;margin-bottom:8px}
.empty-state p{font-size:14.5px;color:var(--text-3);margin-bottom:20px}

/* ---------- article footer blocks ---------- */
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin:40px 0 22px}
.tag{font-size:12.5px;color:var(--text-2);padding:6px 12px;border-radius:6px;background:rgba(18,32,54,.7);border:1px solid var(--line);transition:all .22s var(--ease)}
.tag:hover{color:var(--brand);border-color:var(--line-hover);text-decoration:none;transform:translateY(-2px)}
.back-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--text-2);font-weight:500;margin-bottom:46px}
.back-link svg{width:16px;height:16px;transition:transform .22s var(--ease)}
.back-link:hover{color:var(--brand);text-decoration:none}
.back-link:hover svg{transform:translateX(-4px)}

.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:22px}
.section-head h2{font-size:clamp(22px,2.4vw,28px)}
.section-head .more{font-size:13.5px;color:var(--text-2);display:inline-flex;align-items:center;gap:6px}
.section-head .more:hover{color:var(--brand);text-decoration:none}
.related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;margin-bottom:20px}
.rec-card{display:flex;flex-direction:column;background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--shadow-card);transition:all .22s var(--ease)}
.rec-card:hover{transform:translateY(-4px);border-color:var(--line-hover);text-decoration:none}
.rec-thumb{position:relative;overflow:hidden;aspect-ratio:16/9;background:var(--bg-panel-2)}
.rec-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .22s var(--ease)}
.rec-card:hover .rec-thumb img{transform:scale(1.04)}
.rec-body{padding:16px 18px 18px}
.rec-body h3{font-size:16px;line-height:1.45;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;color:var(--text-1)}
.rec-body time{font-size:12.5px;color:var(--text-3);font-family:var(--mono);font-variant-numeric:tabular-nums}

/* ---------- sidebar ---------- */
.sidebar{display:flex;flex-direction:column;gap:20px;position:sticky;top:104px}
.side-card{background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--r-md);padding:20px 22px;box-shadow:var(--shadow-card)}
.side-card h3{font-size:14px;letter-spacing:.06em;color:var(--text-1);margin-bottom:14px;font-weight:600}
.side-card.side-soft{background:rgba(13,22,38,.7);border-color:rgba(120,180,220,.1)}
.side-list li+li{margin-top:10px}
.side-list a{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text-2);transition:all .22s var(--ease)}
.side-list a:hover{color:var(--brand);text-decoration:none}
.side-list .idx{font-family:var(--mono);font-size:12px;color:var(--brand);border:1px solid var(--line-hover);border-radius:6px;padding:2px 7px;flex:0 0 auto}
.side-note{font-size:12.5px;color:var(--text-3);margin-top:12px;line-height:1.7}
.replay-card{background:linear-gradient(160deg,rgba(31,227,194,.1),rgba(13,22,38,.9));border:1px solid var(--line-hover)}
.replay-card p{font-size:13.5px;color:var(--text-2);margin:8px 0 16px}
.toc a{padding-left:0}
.toc a.on{color:var(--brand)}

/* ---------- cta band ---------- */
.cta-band{margin:96px 0 0}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:34px 38px;box-shadow:var(--shadow-card);
}
.cta-inner h2{font-size:clamp(21px,2.4vw,27px);margin-bottom:8px}
.cta-inner p{font-size:14.5px;color:var(--text-3);max-width:60ch}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{margin-top:104px;background:#050910;border-top:1px solid var(--line);padding:64px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}
.footer-col h4{font-size:14px;font-weight:600;margin-bottom:16px;color:var(--text-1)}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-about{font-size:14px;color:var(--text-2);line-height:1.85;max-width:36ch}
.footer-col ul li+li{margin-top:10px}
.footer-col ul a{font-size:14px;color:var(--text-2)}
.footer-col ul a:hover{color:var(--brand)}
.footer-links-inline{display:flex;gap:16px;margin-top:16px;flex-wrap:wrap}
.footer-links-inline a{font-size:13.5px;color:var(--text-3)}
.footer-links-inline a:hover{color:var(--brand)}
.footer-sub{display:flex;gap:10px;margin-top:14px}
.footer-sub input{
  flex:1 1 auto;min-width:0;padding:11px 14px;font-size:14px;color:var(--text-1);
  background:#0A1220;border:1px solid var(--line);border-radius:12px;transition:border-color .22s var(--ease);
}
.footer-sub input::placeholder{color:var(--text-3)}
.footer-sub input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,227,194,.14)}
.footer-sub input.is-error{border-color:var(--danger)}
.form-hint{font-size:12px;color:var(--text-3);margin-top:10px}
.form-hint.ok{color:var(--brand)}
.form-hint.err{color:var(--danger)}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .article-layout{grid-template-columns:minmax(0,1fr) 300px;gap:36px}
  .nav-card{padding:8px 11px;font-size:13px}
}
@media (max-width:1024px){
  .container{padding:0 24px}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:44px}
  .sidebar{position:static;flex-direction:row;flex-wrap:wrap}
  .side-card{flex:1 1 280px}
  .article-head h1{max-width:none}
}
@media (max-width:920px){
  .nav-cards{
    display:none;position:absolute;left:16px;right:16px;top:calc(100% + 10px);
    flex-direction:column;align-items:stretch;gap:8px;padding:14px;
    background:rgba(10,18,32,.97);border:1px solid var(--line);border-radius:18px;
    box-shadow:var(--shadow-card);backdrop-filter:blur(14px);
  }
  .nav-cards.is-open{display:flex}
  .nav-card{justify-content:flex-start;font-size:14px;padding:12px 14px}
  .nav-panel{position:relative;flex-wrap:nowrap}
  .nav-toggle{display:flex}
  .nav-actions .icon-btn{display:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  body{font-size:15.5px}
  .site-header{padding:10px 0 4px}
  .brand-sub{display:none}
  .article-body{font-size:16.5px;line-height:1.9}
  .article-head h1{font-size:clamp(26px,7vw,34px)}
  .cta-inner{padding:26px 22px}
  .sidebar{flex-direction:column}
  .footer-grid{grid-template-columns:1fr;gap:30px}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .nav-panel{padding:10px 12px;gap:10px}
  .brand-name{font-size:14px}
  .btn{padding:10px 18px;font-size:13.5px}
  .article-head{padding:12px 0 22px}
  .cover-figure{margin-bottom:30px}
  .cta-band{margin-top:64px}
  .footer-sub{flex-direction:column}
  .footer-sub .btn{width:100%}
  .crumbs .cur{white-space:normal}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
}

/* roulang page: category1 */
:root{
  --bg-base:#070C16;
  --bg-panel:#0D1626;
  --bg-panel-2:#121F35;
  --glass:rgba(18,32,54,.66);
  --line:rgba(120,180,220,.14);
  --line-hover:rgba(31,227,194,.42);
  --brand:#1FE3C2;
  --accent:#FF6A2B;
  --cool:#2B7BFF;
  --danger:#FF4D6D;
  --text-1:#F2F7FF;
  --text-2:#A9B8CE;
  --text-3:#6E809A;
  --radius-lg:20px;
  --radius-md:14px;
  --radius-sm:12px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.8);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","Roboto Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  color:var(--text-1);
  background-color:var(--bg-base);
  background-image:
    radial-gradient(120% 60% at 50% 0%,rgba(31,227,194,.06),transparent 60%),
    linear-gradient(rgba(120,180,220,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,180,220,.05) 1px,transparent 1px);
  background-size:100% 100%,44px 44px,44px 44px;
  background-attachment:fixed;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease),opacity .2s var(--ease)}
a:hover{text-decoration:underline;text-underline-offset:3px}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;letter-spacing:.005em}
p{margin:0 0 1.1em;max-width:780px}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
::selection{background:rgba(31,227,194,.28);color:#fff}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}
.section{padding:88px 0}
.section + .section{border-top:1px solid var(--line)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.14em;font-weight:500;
  color:var(--brand);text-transform:uppercase;
}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--brand);opacity:.7}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap}
.section-head h2{font-size:clamp(24px,2.6vw,32px);line-height:1.3}
.section-head .lead{color:var(--text-2);font-size:15px;margin:10px 0 0;max-width:620px}
.text-link{font-size:14px;display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.text-link svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;transition:transform .22s var(--ease)}
.text-link:hover svg{transform:translateX(4px)}

/* ---------- 顶部导航 ---------- */
.site-header{position:sticky;top:0;z-index:80;padding:14px 0;transition:padding .28s var(--ease),background .28s var(--ease)}
.site-header.is-scrolled{padding:8px 0;background:rgba(7,12,22,.78);backdrop-filter:blur(12px)}
.nav-panel{
  display:flex;align-items:center;gap:18px;
  padding:12px 16px;
  border-radius:var(--radius-lg);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:0 18px 40px -30px rgba(0,0,0,.9),inset 0 1px 0 rgba(255,255,255,.06);
}
.brand{display:flex;align-items:center;gap:12px;color:var(--text-1);text-decoration:none;flex:0 0 auto}
.brand:hover{text-decoration:none}
.brand-mark{
  width:38px;height:38px;flex:0 0 auto;border-radius:12px;
  display:grid;place-items:center;
  background:linear-gradient(140deg,rgba(31,227,194,.22),rgba(43,123,255,.14));
  border:1px solid var(--line-hover);
}
.brand-mark svg{width:20px;height:20px;fill:var(--brand)}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-name{font-size:15px;font-weight:700;letter-spacing:.01em}
.brand-sub{font-size:11px;color:var(--text-3);letter-spacing:.04em}
.nav-cards{display:flex;align-items:center;gap:8px;flex:1 1 auto;min-width:0}
.nav-card{
  display:inline-flex;align-items:center;gap:7px;
  padding:8px 12px;border-radius:var(--radius-sm);
  font-size:13px;color:var(--text-2);
  border:1px solid transparent;white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.nav-card svg{width:18px;height:18px;fill:none;stroke:var(--text-3);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;transition:stroke .2s var(--ease)}
.nav-card:hover{background:var(--bg-panel-2);color:var(--text-1);text-decoration:none}
.nav-card:hover svg{stroke:var(--brand)}
.nav-card.is-active{background:var(--bg-panel-2);color:var(--text-1);border-color:var(--line-hover)}
.nav-card.is-active svg{stroke:var(--brand)}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.icon-btn{
  width:40px;height:40px;border-radius:999px;display:grid;place-items:center;
  background:var(--bg-panel-2);border:1px solid var(--line);cursor:pointer;
  transition:border-color .2s var(--ease),transform .2s var(--ease);
}
.icon-btn svg{width:18px;height:18px;fill:none;stroke:var(--text-2);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.icon-btn:hover{border-color:var(--line-hover);transform:translateY(-2px)}
.icon-btn:hover svg{stroke:var(--brand)}
.nav-toggle{display:none;width:42px;height:42px;border-radius:12px;background:var(--bg-panel-2);border:1px solid var(--line);cursor:pointer;padding:0;place-items:center}
.nav-toggle span{display:block;width:18px;height:1.6px;background:var(--text-2);margin:4px auto;border-radius:2px;transition:transform .22s var(--ease),opacity .22s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(5.6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-5.6px) rotate(-45deg)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;text-decoration:none;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn:active{transform:translateY(1px)}
.btn-primary{
  background:linear-gradient(180deg,#FF824C,#FF6A2B);color:#1A0D05;
  box-shadow:0 0 0 1px rgba(255,106,43,.4),0 12px 30px -12px rgba(255,106,43,.55);
}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 1px rgba(255,106,43,.6),0 16px 36px -12px rgba(255,106,43,.65)}
.btn-brand{
  background:rgba(31,227,194,.1);color:var(--brand);border-color:rgba(31,227,194,.42);
  box-shadow:0 0 0 1px rgba(31,227,194,.18),0 12px 30px -16px rgba(31,227,194,.5);
}
.btn-brand:hover{background:rgba(31,227,194,.18)}
.btn-ghost{background:transparent;color:var(--text-1);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--line-hover);color:var(--brand)}
.btn-sm{padding:9px 16px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.45;box-shadow:none;cursor:not-allowed;transform:none}

/* ---------- 分类头条 ---------- */
.page-hero{
  position:relative;margin-top:22px;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--line);
  min-height:200px;
  display:flex;align-items:flex-end;
  background-image:
    linear-gradient(rgba(120,180,220,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,180,220,.06) 1px,transparent 1px),
    linear-gradient(100deg,rgba(7,12,22,.94) 12%,rgba(7,12,22,.62) 62%,rgba(7,12,22,.85)),
    url('/assets/images/backpic/back-1.webp');
  background-size:44px 44px,44px 44px,cover,cover;
  background-position:0 0,0 0,center,center;
}
.page-hero-inner{padding:38px 40px;position:relative;z-index:2}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:16px;flex-wrap:wrap}
.breadcrumb a{color:var(--text-3)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:var(--text-3);opacity:.7}
.breadcrumb .current{color:var(--text-2)}
.page-hero h1{font-size:clamp(30px,4.2vw,44px);line-height:1.22;max-width:760px}
.page-hero h1 .kw{color:var(--brand)}
.page-hero p{color:var(--text-2);font-size:16px;margin:14px 0 20px;max-width:620px}
.hero-badges{display:flex;gap:8px;flex-wrap:wrap;margin-top:6px}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 10px;border-radius:6px;font-size:12px;font-weight:500;letter-spacing:.04em;
  border:1px solid var(--line);color:var(--text-2);background:rgba(13,22,38,.6);
}
.badge-brand{color:var(--brand);border-color:rgba(31,227,194,.4);background:rgba(31,227,194,.08)}
.badge-accent{color:var(--accent);border-color:rgba(255,106,43,.4);background:rgba(255,106,43,.08)}
.badge-cool{color:var(--cool);border-color:rgba(43,123,255,.4);background:rgba(43,123,255,.08)}
.dot{width:7px;height:7px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 0 rgba(31,227,194,.6);animation:breathe 1.6s infinite}
@keyframes breathe{0%{box-shadow:0 0 0 0 rgba(31,227,194,.55)}70%{box-shadow:0 0 0 8px rgba(31,227,194,0)}100%{box-shadow:0 0 0 0 rgba(31,227,194,0)}}

/* ---------- 交错图文 ---------- */
.zigzag{
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
  padding:64px 0;
}
.zigzag + .zigzag{border-top:1px solid var(--line)}
.zigzag-media{position:relative;border-radius:18px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-card)}
.zigzag-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .32s var(--ease)}
.zigzag-media:hover img{transform:scale(1.04)}
.zigzag-media::after{content:"";position:absolute;inset:auto 0 0 0;height:52%;background:linear-gradient(180deg,transparent,rgba(7,12,22,.82))}
.media-caption{
  position:absolute;left:20px;right:20px;bottom:16px;z-index:2;
  font-size:13px;color:var(--text-2);
}
.zigzag-body h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:14px}
.zigzag-body p{color:var(--text-2);font-size:16px}
.zigzag.is-flip .zigzag-media{order:2}
.zigzag.is-flip .zigzag-body{order:1}
.point-list{margin-top:18px;display:grid;gap:10px}
.point-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--text-2)}
.point-list li .tick{
  flex:0 0 auto;width:20px;height:20px;border-radius:6px;margin-top:4px;
  border:1px solid var(--line-hover);color:var(--brand);
  display:grid;place-items:center;font-size:12px;line-height:1;
}

/* ---------- 步骤 ---------- */
.steps{display:grid;gap:14px}
.step{
  display:grid;grid-template-columns:64px 1fr auto;gap:20px;align-items:center;
  padding:22px 24px;border-radius:var(--radius-md);
  background:var(--bg-panel);border:1px solid var(--line);
  box-shadow:var(--shadow-card);transition:transform .22s var(--ease),border-color .22s var(--ease);
}
.step:hover{transform:translateY(-4px);border-color:var(--line-hover)}
.step-num{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:26px;font-weight:700;color:var(--brand);
  display:grid;place-items:center;width:56px;height:46px;border-radius:12px;
  border:1px solid var(--line-hover);background:rgba(31,227,194,.07);
}
.step-body h3{font-size:19px;margin-bottom:6px}
.step-body p{margin:0;color:var(--text-2);font-size:15px}
.step-tag{font-size:12px;color:var(--text-3);letter-spacing:.06em}

/* ---------- 场景列表 ---------- */
.scene-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:20px}
.scene-panel{
  background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--radius-md);
  padding:26px 28px;box-shadow:var(--shadow-card);
}
.scene-panel h3{font-size:20px;margin-bottom:18px}
.scene-list{display:grid;gap:16px}
.scene-list li{display:grid;gap:4px;padding-bottom:16px;border-bottom:1px dashed var(--line)}
.scene-list li:last-child{border-bottom:0;padding-bottom:0}
.scene-list strong{font-size:16px;font-weight:600}
.scene-list span{font-size:14px;color:var(--text-2);line-height:1.7}
.scene-side{display:grid;gap:20px;align-content:start}
.stat-card{
  background:var(--bg-panel-2);border:1px solid var(--line);border-radius:var(--radius-md);
  padding:22px 24px;
}
.stat-card .num{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:32px;font-weight:700;color:var(--text-1);display:block;line-height:1.1;
}
.stat-card .num em{font-style:normal;font-size:16px;color:var(--brand);margin-left:4px}
.stat-card p{margin:8px 0 0;font-size:14px;color:var(--text-3)}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:12px;max-width:900px;margin:0 auto}
.faq-item{
  position:relative;border-radius:var(--radius-md);overflow:hidden;
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(140%);
  transition:border-color .22s var(--ease);
}
.faq-item.is-open{border-color:var(--line-hover)}
.faq-item::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:0 3px 3px 0;
  background:var(--brand);opacity:0;transition:opacity .22s var(--ease);
}
.faq-item.is-open::before{opacity:1}
.faq-q{
  width:100%;text-align:left;background:none;border:0;cursor:pointer;
  padding:20px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:16px;font-weight:600;color:var(--text-1);
}
.faq-q .sign{
  flex:0 0 auto;width:24px;height:24px;border-radius:8px;border:1px solid var(--line);
  display:grid;place-items:center;color:var(--brand);font-size:15px;line-height:1;
  transition:transform .22s var(--ease),border-color .22s var(--ease);
}
.faq-item.is-open .faq-q .sign{transform:rotate(45deg);border-color:var(--line-hover)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s var(--ease)}
.faq-a p{padding:0 24px 22px;margin:0;color:var(--text-2);font-size:15px;line-height:1.85}

/* ---------- 订阅 ---------- */
.sub-card{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-lg);
  backdrop-filter:blur(14px) saturate(140%);
  padding:34px 36px;box-shadow:0 18px 40px -28px rgba(0,0,0,.9),inset 0 1px 0 rgba(255,255,255,.06);
  display:grid;grid-template-columns:1.1fr 1fr;gap:32px;align-items:center;
}
.sub-card h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:10px}
.sub-card p{color:var(--text-2);font-size:15px;margin:0}
.sub-form{display:flex;gap:10px;flex-wrap:wrap}
.sub-form input{
  flex:1 1 220px;min-width:0;padding:13px 16px;border-radius:12px;
  background:rgba(7,12,22,.72);border:1px solid var(--line);color:var(--text-1);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.sub-form input::placeholder{color:var(--text-3)}
.sub-form input:focus{outline:none;border-color:var(--line-hover);box-shadow:0 0 0 3px rgba(31,227,194,.14)}
.sub-form.is-error input{border-color:var(--danger);box-shadow:0 0 0 3px rgba(255,77,109,.14)}
.form-msg{margin-top:12px;font-size:13px;color:var(--text-3);min-height:20px}
.form-msg.ok{color:var(--brand)}
.form-msg.err{color:var(--danger)}
.platform-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.platform{
  display:inline-flex;align-items:center;gap:8px;padding:9px 14px;border-radius:var(--radius-sm);
  background:var(--bg-panel-2);border:1px solid var(--line);font-size:13px;color:var(--text-2);
  transition:border-color .2s var(--ease),transform .2s var(--ease),color .2s var(--ease);
}
.platform:hover{border-color:var(--line-hover);color:var(--text-1);transform:translateY(-2px);text-decoration:none}
.platform svg{width:16px;height:16px;fill:none;stroke:var(--brand);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}

/* ---------- CTA 带 ---------- */
.cta-band{
  margin:0 0 88px;padding:36px 40px;border-radius:var(--radius-lg);
  background:linear-gradient(120deg,rgba(18,31,53,.95),rgba(13,22,38,.9));
  border:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(22px,2.4vw,30px)}
.cta-band p{margin:8px 0 0;color:var(--text-2);font-size:15px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- 其他分类 ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px}
.cat-card{
  display:block;padding:24px;border-radius:var(--radius-md);
  background:var(--bg-panel);border:1px solid var(--line);color:var(--text-1);
  box-shadow:var(--shadow-card);
  transition:transform .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease);
}
.cat-card:hover{transform:translateY(-4px);border-color:var(--line-hover);text-decoration:none;background:var(--bg-panel-2)}
.cat-icon{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;margin-bottom:16px;
  background:rgba(31,227,194,.09);border:1px solid var(--line);
}
.cat-icon svg{width:20px;height:20px;fill:none;stroke:var(--brand);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.cat-card h3{font-size:17px;margin-bottom:8px}
.cat-card p{margin:0;font-size:14px;color:var(--text-2);line-height:1.75}
.cat-card.is-current{border-color:var(--line-hover);background:var(--bg-panel-2)}
.cat-card.is-current::after{content:"当前分类";display:inline-block;margin-top:14px;font-size:12px;color:var(--brand)}

/* ---------- 页脚 ---------- */
.site-footer{background:#050912;border-top:1px solid var(--line);padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand .brand-name{font-size:15px;font-weight:700;display:block}
.footer-brand .brand-sub{font-size:11px;color:var(--text-3);display:block}
.footer-about{font-size:14px;color:var(--text-2);line-height:1.8;margin:0 0 14px;max-width:360px}
.footer-links-inline{display:flex;gap:16px;flex-wrap:wrap}
.footer-links-inline a{font-size:14px}
.footer-col h4{font-size:14px;font-weight:600;margin-bottom:16px;color:var(--text-1)}
.footer-col ul{display:grid;gap:10px}
.footer-col ul a{font-size:14px;color:var(--text-2)}
.footer-col ul a:hover{color:var(--brand)}
.footer-sub{display:flex;gap:8px;flex-wrap:wrap;margin-top:4px}
.footer-sub input{
  flex:1 1 140px;min-width:0;padding:10px 14px;border-radius:12px;
  background:rgba(13,22,38,.9);border:1px solid var(--line);color:var(--text-1);font-size:14px;
}
.footer-sub input:focus{outline:none;border-color:var(--line-hover)}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .nav-card{padding:7px 10px;font-size:12.5px}
  .step{grid-template-columns:56px 1fr auto;padding:20px;gap:16px}
}
@media (max-width:1023px){
  .container{padding:0 24px}
  .section{padding:64px 0}
  .zigzag{grid-template-columns:1fr;gap:28px;padding:44px 0}
  .zigzag.is-flip .zigzag-media{order:0}
  .zigzag.is-flip .zigzag-body{order:0}
  .sub-card{grid-template-columns:1fr;gap:24px;padding:28px}
  .scene-grid{grid-template-columns:1fr}
  .cta-band{margin-bottom:64px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .nav-cards{
    position:absolute;top:calc(100% + 12px);left:0;right:0;
    flex-direction:column;align-items:stretch;gap:10px;
    padding:14px;border-radius:var(--radius-lg);
    background:rgba(9,16,29,.96);border:1px solid var(--line);
    backdrop-filter:blur(16px);
    box-shadow:0 24px 50px -28px rgba(0,0,0,.95);
    display:none;
  }
  .nav-cards.is-open{display:flex}
  .nav-card{padding:12px 14px;font-size:14px;background:var(--bg-panel);border-color:var(--line)}
  .nav-toggle{display:grid}
  .nav-panel{position:relative}
}
@media (max-width:767px){
  body{font-size:15.5px}
  .container{padding:0 16px}
  .section{padding:48px 0}
  .nav-panel{padding:10px 12px;gap:12px}
  .brand-sub{display:none}
  .brand-name{font-size:13.5px;max-width:150px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .nav-actions .btn{display:none}
  .page-hero-inner{padding:28px 20px}
  .page-hero{min-height:180px}
  .step{grid-template-columns:1fr;gap:12px;text-align:left}
  .step-num{width:48px;height:40px;font-size:22px}
  .step-tag{justify-self:start}
  .footer-grid{grid-template-columns:1fr}
  .cta-band{padding:26px 22px;margin-bottom:48px}
  .cta-actions .btn{flex:1 1 auto}
  .faq-q{padding:16px;font-size:15px}
  .faq-a p{padding:0 16px 18px}
  .scene-panel{padding:22px}
  .sub-card{padding:24px 20px}
}
@media (max-width:519px){
  .badge{white-space:normal}
  .section-head{margin-bottom:24px}
  .hero-badges{gap:6px}
  .point-list li{font-size:14px}
  .footer-bottom{font-size:12px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
:root{
  --bg-base:#070C16;
  --bg-panel:#0D1626;
  --bg-panel-2:#121F35;
  --glass:rgba(18,32,54,.66);
  --line:rgba(120,180,220,.14);
  --line-hover:rgba(31,227,194,.42);
  --brand:#1FE3C2;
  --accent:#FF6A2B;
  --cool:#2B7BFF;
  --danger:#FF4D6D;
  --text-1:#F2F7FF;
  --text-2:#A9B8CE;
  --text-3:#6E809A;
  --r-lg:20px;
  --r-md:14px;
  --r-sm:10px;
  --shadow:0 18px 40px -24px rgba(0,0,0,.8);
  --inset:inset 0 1px 0 rgba(255,255,255,.06);
  --trans:220ms cubic-bezier(.2,.7,.3,1);
  --sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:ui-monospace,"JetBrains Mono","Roboto Mono",Menlo,Consolas,monospace;
  --container:1240px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  color:var(--text-1);
  background-color:var(--bg-base);
  background-image:
    radial-gradient(1100px 560px at 50% -8%, rgba(31,227,194,.07), transparent 62%),
    linear-gradient(rgba(120,180,220,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,180,220,.045) 1px, transparent 1px);
  background-size:auto, 44px 44px, 44px 44px;
  background-attachment:fixed;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand);text-decoration:none;transition:color var(--trans),text-decoration-color var(--trans);}
a:hover{text-decoration:underline;text-underline-offset:3px;}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;letter-spacing:.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.container{max-width:var(--container);margin:0 auto;padding:0 32px;}
.num{font-family:var(--mono);font-variant-numeric:tabular-nums;}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  padding:14px 0;
  transition:padding var(--trans),background-color var(--trans);
}
.site-header.is-scrolled{padding:8px 0;background:rgba(7,12,22,.86);backdrop-filter:blur(14px) saturate(140%);-webkit-backdrop-filter:blur(14px) saturate(140%);}
.nav-panel{
  display:flex;align-items:center;gap:18px;
  padding:14px 16px;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow),var(--inset);
}
.brand{display:flex;align-items:center;gap:12px;color:var(--text-1);flex:0 0 auto;}
.brand:hover{text-decoration:none;}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:12px;
  display:grid;place-items:center;
  border:1px solid var(--line-hover);
  background:radial-gradient(circle at 50% 20%, rgba(31,227,194,.22), transparent 70%),var(--bg-panel-2);
  box-shadow:0 0 0 1px rgba(31,227,194,.18),0 10px 24px -14px rgba(31,227,194,.6);
}
.brand-mark svg{width:20px;height:20px;fill:var(--brand);stroke:none;}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-name{font-size:16px;font-weight:700;letter-spacing:.01em;color:var(--text-1);}
.brand-sub{font-size:11px;color:var(--text-3);letter-spacing:.04em;}
.nav-cards{display:flex;align-items:center;gap:8px;margin-left:auto;flex-wrap:wrap;}
.nav-card{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 13px;border-radius:12px;
  font-size:14px;color:var(--text-2);
  border:1px solid transparent;
  transition:background-color var(--trans),color var(--trans),border-color var(--trans),transform var(--trans);
  white-space:nowrap;
}
.nav-card svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;transition:stroke var(--trans);}
.nav-card:hover{background:var(--bg-panel-2);color:var(--text-1);text-decoration:none;border-color:var(--line);}
.nav-card:hover svg{stroke:var(--brand);}
.nav-card.is-active{background:var(--bg-panel-2);color:var(--text-1);border-color:var(--line-hover);}
.nav-card.is-active svg{stroke:var(--brand);}
.nav-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:999px;
  font-size:14px;font-weight:600;line-height:1;
  border:1px solid transparent;
  transition:filter var(--trans),transform var(--trans),box-shadow var(--trans),background-color var(--trans),color var(--trans),border-color var(--trans);
  white-space:nowrap;
}
.btn:hover{text-decoration:none;filter:brightness(1.08);}
.btn:active{transform:translateY(1px);filter:brightness(.96);}
.btn-primary{
  background:linear-gradient(180deg,#FF7F45,#F05513);
  color:#1A0C05;
  box-shadow:0 0 0 1px rgba(255,106,43,.45),0 12px 30px -12px rgba(255,106,43,.55);
}
.btn-primary:hover{box-shadow:0 0 0 1px rgba(255,106,43,.7),0 16px 36px -12px rgba(255,106,43,.75);}
.btn-brand{
  background:rgba(31,227,194,.12);
  color:var(--brand);
  border-color:rgba(31,227,194,.5);
  box-shadow:0 0 0 1px rgba(31,227,194,.5),0 12px 30px -12px rgba(31,227,194,.45);
}
.btn-ghost{background:var(--bg-panel-2);color:var(--text-2);border-color:var(--line);}
.btn-ghost:hover{color:var(--text-1);border-color:var(--line-hover);}
.btn-sm{padding:9px 16px;font-size:13px;}
.icon-btn{
  width:40px;height:40px;border-radius:12px;
  display:grid;place-items:center;
  border:1px solid var(--line);background:var(--bg-panel-2);color:var(--text-2);
  transition:color var(--trans),border-color var(--trans),background-color var(--trans);
}
.icon-btn svg{width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;}
.icon-btn:hover{color:var(--brand);border-color:var(--line-hover);}
.nav-toggle{display:none;width:40px;height:40px;border-radius:12px;border:1px solid var(--line);background:var(--bg-panel-2);padding:10px;flex-direction:column;justify-content:space-between;}
.nav-toggle span{display:block;height:2px;border-radius:2px;background:var(--text-2);transition:background-color var(--trans);}
.nav-toggle:hover span{background:var(--brand);}

/* ============ 分类头条 ============ */
.cat-hero{
  position:relative;
  margin-top:22px;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
  min-height:190px;
  display:flex;align-items:flex-end;
  background-image:
    linear-gradient(rgba(7,12,22,.45), rgba(7,12,22,.45)),
    linear-gradient(rgba(120,180,220,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,180,220,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(7,12,22,.94) 4%, rgba(7,12,22,.62) 48%, rgba(7,12,22,.9) 100%),
    url("/assets/images/backpic/back-2.webp");
  background-size:auto, 44px 44px, 44px 44px, auto, cover;
  background-position:center, center, center, center, center 38%;
  box-shadow:var(--shadow),var(--inset);
}
.cat-hero-inner{padding:34px 34px 30px;max-width:820px;}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:14px;flex-wrap:wrap;}
.crumb a{color:var(--text-2);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:var(--text-3);}
.crumb .current{color:var(--text-3);}
.cat-hero h1{font-size:clamp(30px,4.2vw,44px);line-height:1.22;margin-bottom:12px;}
.cat-hero h1 em{font-style:normal;color:var(--brand);}
.cat-hero p{font-size:15px;color:var(--text-2);max-width:640px;line-height:1.8;}
.cat-hero-back{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-size:14px;color:var(--brand);}
.cat-hero-back svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}

/* ============ 板块通用 ============ */
.section{padding:88px 0 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:34px;flex-wrap:wrap;}
.section-head h2{font-size:clamp(24px,2.6vw,32px);line-height:1.3;}
.section-head p{margin-top:10px;font-size:15px;color:var(--text-2);max-width:660px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.1em;color:var(--brand);
  text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--brand);display:block;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:500;letter-spacing:.04em;line-height:1;
  padding:6px 10px;border-radius:6px;
  border:1px solid var(--line);color:var(--text-3);background:var(--bg-panel-2);
}
.badge-live{color:var(--brand);border-color:rgba(31,227,194,.42);background:rgba(31,227,194,.1);}
.badge-soon{color:var(--accent);border-color:rgba(255,106,43,.42);background:rgba(255,106,43,.1);}
.badge-replay{color:var(--cool);border-color:rgba(43,123,255,.42);background:rgba(43,123,255,.12);}
.dot{width:7px;height:7px;border-radius:50%;background:currentColor;display:inline-block;}
.dot-live{animation:breathe 1.6s ease-in-out infinite;}
@keyframes breathe{0%,100%{opacity:1;transform:scale(1);}50%{opacity:.35;transform:scale(.82);}}

/* ============ 时间轴 ============ */
.timeline{position:relative;display:flex;flex-direction:column;gap:26px;}
.tl-item{display:grid;grid-template-columns:118px 30px minmax(0,1fr);gap:0 20px;align-items:start;}
.tl-time{padding-top:24px;text-align:right;}
.tl-time .clock{display:block;font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:20px;font-weight:600;color:var(--text-1);letter-spacing:.02em;}
.tl-time .phase{display:block;font-size:12px;color:var(--text-3);letter-spacing:.06em;margin-top:4px;}
.tl-rail{position:relative;display:flex;justify-content:center;align-self:stretch;}
.tl-rail::before{content:"";position:absolute;top:0;bottom:-26px;width:1px;background:linear-gradient(180deg,rgba(31,227,194,.45),var(--line));}
.tl-item:last-child .tl-rail::before{display:none;}
.tl-dot{position:relative;z-index:1;width:13px;height:13px;border-radius:50%;background:var(--bg-base);border:2px solid var(--brand);margin-top:26px;}
.tl-item.is-done .tl-dot{border-color:var(--text-3);}
.tl-item.is-soon .tl-dot{border-color:var(--accent);box-shadow:0 0 0 4px rgba(255,106,43,.14);}
.tl-card{
  display:grid;grid-template-columns:200px minmax(0,1fr);gap:20px;
  padding:18px;border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--bg-panel);
  box-shadow:var(--shadow),var(--inset);
  transition:transform var(--trans),border-color var(--trans),background-color var(--trans);
}
.tl-card:hover{transform:translateY(-4px);border-color:var(--line-hover);background:var(--bg-panel-2);}
.tl-thumb{position:relative;border-radius:var(--r-sm);overflow:hidden;aspect-ratio:16/9;background:var(--bg-panel-2);}
.tl-thumb img{width:100%;height:100%;object-fit:cover;transition:transform var(--trans);}
.tl-card:hover .tl-thumb img{transform:scale(1.04);}
.tl-thumb .tag{
  position:absolute;left:8px;top:8px;
  font-size:11px;font-family:var(--mono);letter-spacing:.04em;
  padding:4px 7px;border-radius:6px;
  background:rgba(7,12,22,.78);border:1px solid var(--line);color:var(--text-2);
}
.tl-body{display:flex;flex-direction:column;gap:10px;min-width:0;}
.tl-body h3{font-size:20px;line-height:1.4;}
.tl-body p{font-size:14px;color:var(--text-2);line-height:1.8;}
.tl-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:auto;}
.chip{
  font-size:12px;line-height:1;padding:6px 9px;border-radius:6px;
  border:1px solid var(--line);color:var(--text-2);background:var(--bg-panel-2);
}

/* ============ 看点速读 ============ */
.points-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:16px;}
.point{
  display:flex;gap:14px;align-items:flex-start;
  padding:20px;border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--bg-panel);box-shadow:var(--shadow),var(--inset);
  transition:transform var(--trans),border-color var(--trans);
}
.point:hover{transform:translateY(-4px);border-color:var(--line-hover);}
.point-no{
  flex:0 0 28px;width:28px;height:28px;border-radius:8px;
  display:grid;place-items:center;
  border:1px solid var(--line-hover);color:var(--brand);
  font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:13px;font-weight:600;
}
.point h3{font-size:16px;font-weight:600;line-height:1.5;margin-bottom:4px;}
.point p{font-size:14px;color:var(--text-2);line-height:1.75;}

/* ============ 适用场景 bento ============ */
.scene-grid{display:grid;grid-template-columns:1.35fr 1fr;grid-auto-rows:minmax(170px,auto);gap:16px;}
.scene{
  position:relative;overflow:hidden;
  padding:26px;border:1px solid var(--line);border-radius:var(--r-lg);
  background:var(--bg-panel);box-shadow:var(--shadow),var(--inset);
  display:flex;flex-direction:column;justify-content:flex-end;gap:10px;
  transition:transform var(--trans),border-color var(--trans);
  min-height:170px;
}
.scene:hover{transform:translateY(-4px);border-color:var(--line-hover);}
.scene.scene-wide{grid-row:span 2;}
.scene::after{
  content:"";position:absolute;inset:0;z-index:0;
  background:linear-gradient(180deg,rgba(7,12,22,.28),rgba(7,12,22,.9));
}
.scene-bg{position:absolute;inset:0;z-index:-1;}
.scene-bg img{width:100%;height:100%;object-fit:cover;transition:transform 320ms cubic-bezier(.2,.7,.3,1);}
.scene:hover .scene-bg img{transform:scale(1.04);}
.scene-text{position:relative;z-index:1;}
.scene h3{font-size:20px;margin-bottom:6px;}
.scene p{font-size:14px;color:var(--text-2);max-width:420px;}
.scene .scene-meta{font-family:var(--mono);font-size:12px;color:var(--brand);letter-spacing:.06em;}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:920px;}
.faq-item{
  border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--glass);backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  overflow:hidden;position:relative;
  transition:border-color var(--trans);
}
.faq-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:0;background:var(--brand);
  transition:width var(--trans);
}
.faq-item[open]::before{width:4px;}
.faq-item[open]{border-color:var(--line-hover);}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;font-size:16px;font-weight:600;color:var(--text-1);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary .sign{
  flex:0 0 22px;width:22px;height:22px;border-radius:6px;
  border:1px solid var(--line);display:grid;place-items:center;
  color:var(--brand);font-family:var(--mono);font-size:14px;line-height:1;
  transition:transform var(--trans),border-color var(--trans);
}
.faq-item[open] summary .sign{transform:rotate(45deg);border-color:var(--line-hover);}
.faq-body{padding:0 24px 22px;font-size:15px;color:var(--text-2);line-height:1.9;max-width:760px;}

/* ============ 其他分类 ============ */
.other-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;}
.other-card{
  display:flex;flex-direction:column;gap:10px;
  padding:22px;border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--bg-panel);box-shadow:var(--shadow),var(--inset);
  color:var(--text-1);
  transition:transform var(--trans),border-color var(--trans),background-color var(--trans);
}
.other-card:hover{transform:translateY(-4px);border-color:var(--line-hover);background:var(--bg-panel-2);text-decoration:none;}
.other-card.is-current{border-color:var(--line-hover);background:var(--bg-panel-2);}
.other-card .oc-top{display:flex;align-items:center;justify-content:space-between;}
.other-card svg{width:22px;height:22px;fill:none;stroke:var(--brand);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;}
.other-card h3{font-size:17px;line-height:1.45;}
.other-card p{font-size:13px;color:var(--text-3);line-height:1.7;}
.other-card .oc-flag{font-size:11px;letter-spacing:.06em;color:var(--brand);font-family:var(--mono);}

/* ============ CTA 带 ============ */
.cta-band{
  margin-top:88px;
  padding:38px;border:1px solid var(--line);border-radius:var(--r-lg);
  background:linear-gradient(120deg, rgba(18,32,54,.95), rgba(13,22,38,.95));
  box-shadow:var(--shadow),var(--inset);
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(22px,2.4vw,28px);margin-bottom:10px;}
.cta-band p{font-size:15px;color:var(--text-2);max-width:560px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:96px;
  background:#05090F;
  border-top:1px solid var(--line);
  padding:64px 0 28px;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px;}
.footer-col h4{font-size:14px;font-weight:600;margin-bottom:16px;color:var(--text-1);}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col ul a{font-size:14px;color:var(--text-2);}
.footer-col ul a:hover{color:var(--brand);}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand .brand-name{font-size:16px;font-weight:700;color:var(--text-1);}
.footer-brand .brand-sub{font-size:11px;color:var(--text-3);letter-spacing:.04em;display:block;}
.footer-about{font-size:14px;color:var(--text-2);line-height:1.85;max-width:340px;}
.footer-links-inline{display:flex;gap:16px;margin-top:16px;flex-wrap:wrap;}
.footer-links-inline a{font-size:13px;color:var(--text-3);}
.footer-links-inline a:hover{color:var(--brand);}
.footer-sub{display:flex;gap:8px;margin-top:14px;flex-wrap:wrap;}
.footer-sub input{
  flex:1 1 150px;min-width:0;
  padding:10px 14px;border-radius:12px;
  background:var(--bg-panel);border:1px solid var(--line);color:var(--text-1);
  font-size:14px;transition:border-color var(--trans),box-shadow var(--trans);
}
.footer-sub input::placeholder{color:var(--text-3);}
.footer-sub input:focus{outline:none;border-color:var(--line-hover);box-shadow:0 0 0 3px rgba(31,227,194,.14);}
.footer-sub.is-error input{border-color:var(--danger);box-shadow:0 0 0 3px rgba(255,77,109,.14);}
.footer-sub.is-ok input{border-color:var(--line-hover);}
.form-msg{font-size:12px;margin-top:10px;color:var(--text-3);line-height:1.6;width:100%;}
.form-msg.ok{color:var(--brand);}
.form-msg.err{color:var(--danger);}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}

/* ============ 响应式 ============ */
@media (max-width:1280px){
  .nav-card{padding:8px 11px;font-size:13px;}
  .tl-card{grid-template-columns:180px minmax(0,1fr);}
}
@media (max-width:1024px){
  .container{padding:0 24px;}
  .nav-cards{display:none;}
  .nav-toggle{display:flex;}
  .nav-panel{position:relative;flex-wrap:wrap;}
  .nav-cards.is-open{
    display:flex;flex-direction:column;width:100%;margin:14px 0 4px;
    padding:12px;border:1px solid var(--line);border-radius:14px;
    background:var(--bg-panel);gap:6px;
  }
  .nav-cards.is-open .nav-card{width:100%;justify-content:flex-start;padding:12px 14px;}
  .nav-actions{margin-left:auto;}
  .section{padding-top:64px;}
  .cta-band{margin-top:64px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .scene-grid{grid-template-columns:1fr 1fr;}
  .scene.scene-wide{grid-row:auto;grid-column:span 2;}
}
@media (max-width:768px){
  .container{padding:0 16px;}
  .brand-sub{display:none;}
  .nav-actions .btn-primary{padding:10px 16px;font-size:13px;}
  .cat-hero-inner{padding:26px 20px 24px;}
  .section{padding-top:48px;}
  .section-head{margin-bottom:24px;}
  .timeline{gap:20px;}
  .tl-item{grid-template-columns:minmax(0,1fr);gap:0;}
  .tl-rail{display:none;}
  .tl-time{text-align:left;padding-top:0;display:flex;align-items:baseline;gap:10px;margin-bottom:10px;}
  .tl-time .clock{font-size:18px;}
  .tl-time .phase{margin-top:0;}
  .tl-card{grid-template-columns:minmax(0,1fr);padding:16px;}
  .tl-thumb{aspect-ratio:16/9;}
  .scene-grid{grid-template-columns:1fr;}
  .scene.scene-wide{grid-column:auto;}
  .cta-band{padding:26px 20px;}
  .cta-band{margin-top:48px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .site-footer{margin-top:64px;padding-top:44px;}
  .faq-item summary{padding:18px 18px;font-size:15px;}
  .faq-body{padding:0 18px 18px;}
}
@media (max-width:520px){
  .brand-name{font-size:14px;}
  .cat-hero h1{font-size:26px;}
  .tl-body h3{font-size:18px;}
  .points-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
}

/* roulang page: category3 */
:root{
  --bg-base:#070C16;
  --bg-panel:#0D1626;
  --bg-panel-2:#121F35;
  --glass:rgba(18,32,54,.66);
  --line:rgba(120,180,220,.14);
  --line-hover:rgba(31,227,194,.42);
  --brand:#1FE3C2;
  --accent:#FF6A2B;
  --cool:#2B7BFF;
  --text-1:#F2F7FF;
  --text-2:#A9B8CE;
  --text-3:#6E809A;
  --danger:#FF4D6D;
  --r-lg:20px;
  --r-md:18px;
  --r-sm:12px;
  --r-xs:6px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.8);
  --inset-hi:inset 0 1px 0 rgba(255,255,255,.06);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --font-num:ui-monospace,"JetBrains Mono","Roboto Mono",SFMono-Regular,Menlo,monospace;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  color:var(--text-1);
  background-color:var(--bg-base);
  background-image:
    radial-gradient(1100px 560px at 50% -8%, rgba(31,227,194,.07), transparent 68%),
    linear-gradient(rgba(120,180,220,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,180,220,.045) 1px, transparent 1px);
  background-size:auto,44px 44px,44px 44px;
  background-position:center top,center top,center top;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease)}
a:hover{text-decoration:underline;text-underline-offset:3px}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
button,input{font-family:inherit;font-size:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
svg{display:block}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:80;padding:14px 0;transition:padding .25s var(--ease)}
.site-header.is-scrolled{padding:8px 0}
.nav-panel{
  position:relative;display:flex;align-items:center;gap:16px;
  padding:12px 16px;border-radius:var(--r-lg);
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card),var(--inset-hi);
  transition:background .25s var(--ease),border-color .25s var(--ease);
}
.site-header.is-scrolled .nav-panel{background:rgba(9,16,28,.88);border-color:rgba(31,227,194,.18)}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;color:var(--text-1)}
.brand:hover{text-decoration:none}
.brand-mark{
  width:38px;height:38px;border-radius:12px;flex-shrink:0;
  display:grid;place-items:center;
  background:rgba(31,227,194,.12);
  border:1px solid rgba(31,227,194,.34);
}
.brand-mark svg{width:18px;height:18px;fill:var(--brand)}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-name{font-size:15px;font-weight:700;letter-spacing:.01em}
.brand-sub{font-size:11px;color:var(--text-3);letter-spacing:.03em}
.nav-cards{display:flex;align-items:center;gap:8px;flex:1;justify-content:center;flex-wrap:wrap}
.nav-card{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 12px;border-radius:var(--r-sm);
  font-size:13.5px;color:var(--text-2);
  border:1px solid transparent;white-space:nowrap;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.nav-card:hover{background:var(--bg-panel-2);color:var(--text-1);border-color:var(--line);text-decoration:none}
.nav-card svg{width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;transition:color .22s var(--ease)}
.nav-card:hover svg{color:var(--brand)}
.nav-card.is-active{background:rgba(31,227,194,.10);border-color:var(--line-hover);color:var(--text-1)}
.nav-card.is-active svg{color:var(--brand)}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-toggle{display:none;flex-direction:column;align-items:center;justify-content:center;gap:4px;width:40px;height:40px;border-radius:var(--r-sm);border:1px solid var(--line);background:transparent}
.nav-toggle span{display:block;width:16px;height:2px;border-radius:2px;background:var(--text-1);transition:transform .22s var(--ease),opacity .22s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:999px;
  font-size:14px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;text-decoration:none;
  transition:filter .2s var(--ease),transform .2s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),color .22s var(--ease);
}
.btn:hover{text-decoration:none;filter:brightness(1.08)}
.btn:active{transform:translateY(1px);filter:brightness(.98)}
.btn:disabled{opacity:.45;box-shadow:none;cursor:not-allowed}
.btn-primary{background:var(--accent);color:#1C0A02;box-shadow:0 0 0 1px rgba(255,106,43,.5),0 12px 30px -12px rgba(255,106,43,.45)}
.btn-primary:hover{box-shadow:0 0 0 1px rgba(255,106,43,.62),0 16px 34px -12px rgba(255,106,43,.6)}
.btn-brand{background:var(--brand);color:#03251F;box-shadow:0 0 0 1px rgba(31,227,194,.5),0 12px 30px -12px rgba(31,227,194,.45)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--text-1)}
.btn-ghost:hover{background:var(--bg-panel-2);border-color:var(--line-hover)}
.btn-sm{padding:9px 16px;font-size:13.5px}
.icon-btn{
  width:40px;height:40px;border-radius:var(--r-sm);
  display:grid;place-items:center;
  border:1px solid var(--line);background:rgba(18,32,54,.5);color:var(--text-2);
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease)
}
.icon-btn:hover{background:var(--bg-panel-2);color:var(--brand);border-color:var(--line-hover);text-decoration:none}
.icon-btn svg{width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}

/* ---------- category hero ---------- */
.cat-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.cat-hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.3}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,12,22,.55) 0%,rgba(7,12,22,.86) 62%,var(--bg-base) 100%);
}
.cat-hero::before{
  content:"";position:absolute;inset:0;z-index:1;opacity:.5;
  background-image:linear-gradient(rgba(120,180,220,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(120,180,220,.06) 1px,transparent 1px);
  background-size:44px 44px;
}
.cat-hero-inner{position:relative;z-index:2;padding:44px 32px 52px}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:20px;flex-wrap:wrap}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:var(--text-3)}
.breadcrumb .current{color:var(--text-3)}
.cat-hero h1{font-size:clamp(30px,4.2vw,44px);line-height:1.22;font-weight:700;max-width:860px;letter-spacing:-.01em}
.cat-hero-desc{margin-top:16px;font-size:16px;color:var(--text-2);max-width:640px}
.back-home{display:inline-flex;align-items:center;gap:8px;margin-top:24px;font-size:14px;color:var(--brand)}
.back-home:hover{gap:12px;text-decoration:none}
.back-home span{transition:transform .22s var(--ease)}

/* ---------- sections ---------- */
.section{padding:96px 0}
.section-tight{padding:80px 0}
.section-divider{border-top:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:44px}
.section-head h2{font-size:clamp(24px,2.6vw,32px);line-height:1.3;font-weight:700;letter-spacing:-.01em}
.section-head p{margin-top:14px;color:var(--text-2);font-size:15.5px;max-width:660px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:16px;
  font-size:12px;font-weight:500;letter-spacing:.16em;text-transform:uppercase;
  color:var(--brand);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--brand);opacity:.7}

/* ---------- bento ---------- */
.bento{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.bento-card{
  position:relative;display:flex;flex-direction:column;
  background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;box-shadow:var(--shadow-card),var(--inset-hi);
  transition:transform .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease);
}
.bento-card:hover{transform:translateY(-4px);border-color:var(--line-hover);background:var(--bg-panel-2)}
.bento-feature{grid-column:span 2;grid-row:span 2}
.bento-media{position:relative;overflow:hidden;aspect-ratio:16/9;background:var(--bg-panel-2)}
.bento-feature .bento-media{aspect-ratio:16/8}
.bento-media img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--ease)}
.bento-card:hover .bento-media img{transform:scale(1.04)}
.bento-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,12,22,0) 40%,rgba(7,12,22,.7) 100%)}
.bento-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1}
.bento-feature .bento-body{padding:28px}
.bento-card h3{font-size:19px;line-height:1.4;font-weight:600}
.bento-feature h3{font-size:clamp(21px,2vw,25px)}
.bento-card p{font-size:14.5px;color:var(--text-2);line-height:1.8}
.bento-feature p{font-size:15.5px;max-width:520px}
.corner-time{
  position:absolute;right:10px;bottom:10px;z-index:2;
  padding:4px 9px;border-radius:var(--r-xs);
  background:rgba(7,12,22,.78);border:1px solid var(--line);
  font-family:var(--font-num);font-size:12px;letter-spacing:.02em;color:var(--text-1);
  font-variant-numeric:tabular-nums;
}
.badge{
  display:inline-flex;align-items:center;gap:6px;align-self:flex-start;
  padding:4px 9px;border-radius:var(--r-xs);
  font-size:12px;line-height:1;font-weight:500;letter-spacing:.04em;
  border:1px solid transparent;
}
.badge-live{background:rgba(31,227,194,.13);color:var(--brand);border-color:rgba(31,227,194,.3)}
.badge-next{background:rgba(255,106,43,.13);color:var(--accent);border-color:rgba(255,106,43,.3)}
.badge-cool{background:rgba(43,123,255,.14);color:#7FB0FF;border-color:rgba(43,123,255,.32)}
.badge-mute{background:rgba(120,180,220,.1);color:var(--text-2);border-color:var(--line)}
.tick-list{display:flex;flex-direction:column;gap:10px;margin-top:2px}
.tick-list li{position:relative;padding-left:20px;font-size:14.5px;color:var(--text-2)}
.tick-list li::before{
  content:"";position:absolute;left:4px;top:.68em;width:6px;height:6px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 0 3px rgba(31,227,194,.14)
}
.text-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--brand);margin-top:auto}
.text-link:hover{gap:12px;text-decoration:none}
.text-link svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* ---------- steps ---------- */
.steps-wrap{display:grid;grid-template-columns:0.9fr 1.4fr;gap:56px;align-items:start}
.steps{display:flex;flex-direction:column;gap:16px}
.step{
  display:flex;gap:18px;padding:22px 24px;
  background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--shadow-card),var(--inset-hi);
  transition:transform .22s var(--ease),border-color .22s var(--ease)
}
.step:hover{transform:translateY(-4px);border-color:var(--line-hover)}
.step-no{
  flex-shrink:0;width:34px;height:34px;border-radius:10px;
  display:grid;place-items:center;
  border:1px solid rgba(31,227,194,.5);color:var(--brand);
  font-family:var(--font-num);font-size:14px;font-variant-numeric:tabular-nums;
}
.step h3{font-size:17px;font-weight:600;line-height:1.5;margin-bottom:6px}
.step p{font-size:14.5px;color:var(--text-2)}
.side-panel{
  padding:28px;border-radius:var(--r-md);
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border:1px solid var(--line);box-shadow:var(--shadow-card),var(--inset-hi)
}
.side-panel h3{font-size:18px;font-weight:600;margin-bottom:14px}
.side-panel p{font-size:14.5px;color:var(--text-2)}
.side-metrics{display:flex;gap:28px;margin-top:24px;flex-wrap:wrap}
.metric-value{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:26px;color:var(--brand);line-height:1.2}
.metric-label{font-size:12.5px;color:var(--text-3);letter-spacing:.04em;margin-top:4px}

/* ---------- picks ---------- */
.pick-row{display:grid;grid-template-columns:1.25fr 1fr 1fr;gap:20px}
.pick-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--shadow-card),var(--inset-hi);
  transition:transform .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease)
}
.pick-card:hover{transform:translateY(-4px);border-color:var(--line-hover);background:var(--bg-panel-2)}
.pick-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-panel-2)}
.pick-card:first-child .pick-media{aspect-ratio:16/10}
.pick-media img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--ease)}
.pick-card:hover .pick-media img{transform:scale(1.04)}
.pick-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,12,22,0) 45%,rgba(7,12,22,.72) 100%)}
.pick-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.pick-body h3{font-size:17px;font-weight:600;line-height:1.45}
.pick-body p{font-size:14px;color:var(--text-2)}
.pick-meta{display:flex;align-items:center;gap:10px;margin-top:auto;padding-top:8px;font-size:13px;color:var(--text-3)}
.pick-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--text-3);opacity:.7}
.mono{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ---------- faq ---------- */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:920px}
.faq-item{
  border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow-card),var(--inset-hi);
  overflow:hidden;transition:border-color .22s var(--ease)
}
.faq-item:hover{border-color:var(--line-hover)}
.faq-item.is-open{border-color:var(--line-hover)}
.faq-q{
  position:relative;width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 24px 22px 26px;text-align:left;
  font-size:16px;font-weight:600;color:var(--text-1)
}
.faq-q::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:3px;
  background:var(--brand);opacity:0;transition:opacity .22s var(--ease)
}
.faq-item.is-open .faq-q::before{opacity:1}
.faq-icon{position:relative;flex-shrink:0;width:20px;height:20px}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand);border-radius:2px;
  transform:translate(-50%,-50%);transition:transform .22s var(--ease),opacity .22s var(--ease)
}
.faq-icon::before{width:13px;height:2px}
.faq-icon::after{width:2px;height:13px}
.faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) scaleY(0);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s var(--ease)}
.faq-a-inner{padding:0 24px 24px 26px;font-size:14.5px;color:var(--text-2);line-height:1.85;max-width:720px}

/* ---------- other categories ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.cat-card{
  position:relative;display:flex;flex-direction:column;gap:12px;
  padding:24px;border-radius:var(--r-md);
  background:var(--bg-panel);border:1px solid var(--line);
  box-shadow:var(--shadow-card),var(--inset-hi);
  color:var(--text-1);
  transition:transform .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease)
}
.cat-card:hover{transform:translateY(-4px);border-color:var(--line-hover);background:var(--bg-panel-2);text-decoration:none}
.cat-card svg{width:22px;height:22px;fill:none;stroke:var(--brand);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.cat-card h3{font-size:16px;font-weight:600;line-height:1.5}
.cat-card p{font-size:13.5px;color:var(--text-2)}
.cat-card.is-current{background:rgba(31,227,194,.08);border-color:var(--line-hover)}
.cat-card.is-current::after{
  content:"当前浏览";position:absolute;right:16px;top:16px;
  font-size:11px;letter-spacing:.04em;color:var(--brand)
}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-lg);
  background:var(--bg-panel);border:1px solid var(--line);
  box-shadow:var(--shadow-card),var(--inset-hi);
}
.cta-band-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.16}
.cta-band-inner{position:relative;z-index:2;padding:56px 48px;display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;line-height:1.32;max-width:560px}
.cta-band p{margin-top:12px;font-size:15px;color:var(--text-2);max-width:560px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{
  margin-top:96px;background:#050A13;border-top:1px solid var(--line);
  padding:64px 0 0;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.footer-col h4{font-size:14px;font-weight:600;letter-spacing:.02em;margin-bottom:18px;color:var(--text-1)}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col ul a{font-size:14px;color:var(--text-2)}
.footer-col ul a:hover{color:var(--brand)}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.footer-brand .brand-name{font-size:15px;font-weight:700}
.footer-brand .brand-sub{font-size:11px;color:var(--text-3);display:block;margin-top:2px}
.footer-about{font-size:14px;color:var(--text-2);line-height:1.85;max-width:360px}
.footer-links-inline{display:flex;gap:18px;margin-top:18px;flex-wrap:wrap}
.footer-links-inline a{font-size:13.5px;color:var(--text-3)}
.footer-links-inline a:hover{color:var(--brand)}
.footer-sub{display:flex;gap:10px;margin-top:4px}
.footer-sub input{
  flex:1;min-width:0;padding:11px 14px;border-radius:var(--r-sm);
  background:rgba(7,12,22,.9);border:1px solid var(--line);color:var(--text-1);
  transition:border-color .22s var(--ease)
}
.footer-sub input::placeholder{color:var(--text-3)}
.footer-sub input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,227,194,.14)}
.footer-sub.is-error input{border-color:var(--danger);box-shadow:0 0 0 3px rgba(255,77,109,.14)}
.footer-form-msg{margin-top:10px;font-size:12.5px;color:var(--text-3);min-height:18px}
.footer-form-msg.ok{color:var(--brand)}
.footer-form-msg.err{color:var(--danger)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:22px 0 28px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3)
}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .nav-card{padding:8px 10px;font-size:13px}
  .bento-body{padding:20px}
  .bento-feature .bento-body{padding:24px}
}
@media (max-width:1100px){
  .steps-wrap{grid-template-columns:1fr;gap:32px}
  .pick-row{grid-template-columns:1fr 1fr}
  .pick-card:first-child{grid-column:span 2}
}
@media (max-width:1024px){
  .container{padding:0 24px}
  .cat-hero-inner{padding:36px 24px 44px}
  .section{padding:72px 0}
  .section-tight{padding:64px 0}
  .bento{grid-template-columns:repeat(2,1fr)}
  .bento-feature{grid-column:span 2;grid-row:auto}
  .cat-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .cta-band-inner{padding:44px 32px}
}
@media (max-width:900px){
  .nav-cards{
    position:absolute;top:calc(100% + 10px);left:0;right:0;
    flex-direction:column;align-items:stretch;gap:6px;
    padding:12px;border-radius:var(--r-md);
    background:rgba(13,22,38,.98);
    border:1px solid var(--line);
    box-shadow:0 24px 48px -20px rgba(0,0,0,.9);
    display:none;
  }
  .nav-cards.is-open{display:flex}
  .nav-card{width:100%;padding:12px 14px;font-size:14px}
  .nav-toggle{display:flex}
  .brand-sub{display:none}
}
@media (max-width:768px){
  body{font-size:15.5px}
  .container{padding:0 16px}
  .section{padding:56px 0}
  .section-tight{padding:48px 0}
  .nav-actions .btn-primary{padding:10px 14px;font-size:13px}
  .cta-band-inner{padding:36px 22px;flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding-bottom:36px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .faq-q{padding:18px 18px 18px 20px;font-size:15px}
  .faq-a-inner{padding:0 18px 20px 20px}
  .site-footer{margin-top:64px}
}
@media (max-width:560px){
  .bento{grid-template-columns:1fr}
  .bento-feature{grid-column:span 1}
  .pick-row{grid-template-columns:1fr}
  .pick-card:first-child{grid-column:span 1}
  .cat-grid{grid-template-columns:1fr}
  .breadcrumb{font-size:12.5px}
  .step{padding:18px}
  .side-panel{padding:22px}
  .bento-body{padding:18px}
  .bento-feature .bento-body{padding:20px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
}

/* roulang page: category4 */
:root{
  --bg-base:#070C16;
  --bg-panel:#0D1626;
  --bg-panel-2:#121F35;
  --glass:rgba(18,32,54,.66);
  --line:rgba(120,180,220,.14);
  --line-hover:rgba(31,227,194,.42);
  --brand:#1FE3C2;
  --accent:#FF6A2B;
  --cool:#2B7BFF;
  --text-1:#F2F7FF;
  --text-2:#A9B8CE;
  --text-3:#6E809A;
  --danger:#FF4D6D;
  --r-xl:20px;
  --r-lg:18px;
  --r-md:14px;
  --r-sm:12px;
  --shadow:0 18px 40px -24px rgba(0,0,0,.8);
  --inset:inset 0 1px 0 rgba(255,255,255,.06);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --font-num:ui-monospace,"JetBrains Mono","Roboto Mono",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  color:var(--text-1);
  background-color:var(--bg-base);
  background-image:
    radial-gradient(1100px 500px at 50% -10%, rgba(43,123,255,.10), transparent 62%),
    linear-gradient(rgba(120,180,220,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,180,220,.045) 1px, transparent 1px);
  background-size:auto, 44px 44px, 44px 44px;
  background-attachment:fixed;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease)}
a:hover{text-decoration:underline;text-underline-offset:3px}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
::selection{background:rgba(31,227,194,.28);color:#fff}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}
.sec{padding-top:88px}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:32px;flex-wrap:wrap}
.sec-head h2{font-size:clamp(24px,2.6vw,32px);line-height:1.3}
.sec-head p{margin-top:10px;color:var(--text-2);font-size:15px;max-width:640px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.08em;font-weight:500;color:var(--brand);margin-bottom:12px}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--brand);display:block}
.mono{font-family:var(--font-num);font-variant-numeric:tabular-nums}

/* ---------- 顶部导航 ---------- */
.site-header{position:sticky;top:0;z-index:80;padding:14px 0;transition:padding .26s var(--ease)}
.site-header.is-scrolled{padding:8px 0}
.nav-panel{
  position:relative;
  display:flex;
  align-items:center;
  gap:14px;
  padding:12px 16px;
  border-radius:var(--r-xl);
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border:1px solid var(--line);
  box-shadow:var(--shadow),var(--inset);
  transition:background .26s var(--ease),border-color .26s var(--ease)
}
.site-header.is-scrolled .nav-panel{background:rgba(9,16,28,.88);border-color:rgba(120,180,220,.2)}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;color:var(--text-1)}
.brand:hover{text-decoration:none}
.brand-mark{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;flex-shrink:0;
  background:linear-gradient(160deg, rgba(31,227,194,.20), rgba(43,123,255,.14));
  border:1px solid rgba(31,227,194,.35);
}
.brand-mark svg{width:18px;height:18px;fill:var(--brand);stroke:none}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-name{font-size:15px;font-weight:700;color:#fff;letter-spacing:.2px;white-space:nowrap}
.brand-sub{font-size:11px;color:var(--text-3);letter-spacing:.04em;white-space:nowrap}
.nav-cards{display:flex;align-items:center;gap:8px;margin-left:auto;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}
.nav-cards::-webkit-scrollbar{display:none}
.nav-card{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 13px;border-radius:var(--r-sm);
  font-size:13px;color:var(--text-2);white-space:nowrap;
  border:1px solid transparent;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.nav-card svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
.nav-card:hover{background:var(--bg-panel-2);color:var(--text-1);border-color:var(--line);text-decoration:none}
.nav-card:hover svg{stroke:var(--brand)}
.nav-card.is-active{background:rgba(31,227,194,.10);border-color:var(--line-hover);color:#fff}
.nav-card.is-active svg{stroke:var(--brand)}
.nav-actions{display:flex;align-items:center;gap:8px;flex-shrink:0}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:999px;font-size:14px;font-weight:600;
  border:1px solid transparent;white-space:nowrap;
  transition:filter .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease);
}
.btn:hover{text-decoration:none}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--accent);color:#1B0B02;box-shadow:0 0 0 1px rgba(255,106,43,.45),0 12px 30px -12px rgba(255,106,43,.45)}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 1px rgba(255,106,43,.6),0 16px 34px -12px rgba(255,106,43,.55)}
.btn-brand{background:var(--brand);color:#04211C;box-shadow:0 0 0 1px rgba(31,227,194,.5),0 12px 30px -12px rgba(31,227,194,.45)}
.btn-brand:hover{filter:brightness(1.08);box-shadow:0 0 0 1px rgba(31,227,194,.66),0 16px 34px -12px rgba(31,227,194,.55)}
.btn-ghost{background:rgba(18,32,54,.62);border-color:var(--line);color:var(--text-1)}
.btn-ghost:hover{border-color:var(--line-hover);color:#fff;filter:brightness(1.05)}
.btn-sm{padding:9px 16px;font-size:13px}
.icon-btn{
  width:40px;height:40px;border-radius:var(--r-sm);display:grid;place-items:center;flex-shrink:0;
  border:1px solid var(--line);background:rgba(18,32,54,.5);color:var(--text-2);
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease)
}
.icon-btn svg{width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.icon-btn:hover{color:var(--brand);border-color:var(--line-hover);background:var(--bg-panel-2)}
.nav-toggle{display:none;width:40px;height:40px;border-radius:var(--r-sm);border:1px solid var(--line);background:rgba(18,32,54,.5);padding:0}
.nav-toggle span{display:block;width:16px;height:2px;margin:3px auto;border-radius:2px;background:var(--text-1);transition:transform .22s var(--ease),opacity .22s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* ---------- 分类头 ---------- */
.cat-hero{
  position:relative;margin-top:22px;border-radius:var(--r-xl);overflow:hidden;
  min-height:200px;display:flex;align-items:center;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  border:1px solid var(--line);box-shadow:var(--shadow)
}
.cat-hero::before{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(6,11,20,.95) 8%,rgba(6,11,20,.72) 52%,rgba(6,11,20,.52) 100%)}
.cat-hero::after{
  content:"";position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(120,180,220,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(120,180,220,.06) 1px,transparent 1px);
  background-size:36px 36px;
  -webkit-mask-image:linear-gradient(90deg,rgba(0,0,0,.9),transparent 78%);
  mask-image:linear-gradient(90deg,rgba(0,0,0,.9),transparent 78%);
}
.cat-hero .container{position:relative;z-index:2;padding-top:30px;padding-bottom:30px}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:14px;flex-wrap:wrap}
.crumb a{color:var(--text-3)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:rgba(110,128,154,.6)}
.crumb .cur{color:var(--text-2)}
.cat-hero h1{font-size:clamp(26px,3.4vw,38px);line-height:1.24;max-width:840px}
.cat-hero h1 em{font-style:normal;color:var(--brand)}
.cat-hero .lead{margin-top:12px;color:var(--text-2);font-size:15px;max-width:660px}
.back-home{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-size:14px;font-weight:600}
.back-home svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s var(--ease)}
.back-home:hover svg{transform:translateX(-3px)}

/* ---------- 数据条列表 ---------- */
.metrics{display:flex;flex-direction:column;border-bottom:1px solid var(--line)}
.metric-row{
  display:grid;grid-template-columns:104px minmax(0,1fr) auto;align-items:center;gap:26px;
  padding:26px 10px;border-top:1px solid var(--line);
  transition:background .22s var(--ease),border-color .22s var(--ease)
}
.metric-row:hover{background:linear-gradient(90deg,rgba(31,227,194,.06),rgba(31,227,194,0) 70%);border-top-color:var(--line-hover)}
.metric-num{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:42px;font-weight:700;line-height:1;letter-spacing:-.02em;
  color:rgba(31,227,194,.82)
}
.metric-body h3{font-size:19px;line-height:1.45;margin-bottom:6px}
.metric-body p{color:var(--text-2);font-size:14px;line-height:1.7}
.metric-side{display:flex;align-items:center;gap:12px;flex-shrink:0}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:500;letter-spacing:.04em;line-height:1;
  padding:6px 10px;border-radius:6px;border:1px solid var(--line);color:var(--text-2);background:rgba(18,32,54,.6);white-space:nowrap
}
.badge-live{color:var(--brand);border-color:rgba(31,227,194,.4);background:rgba(31,227,194,.10)}
.badge-warn{color:var(--accent);border-color:rgba(255,106,43,.4);background:rgba(255,106,43,.10)}
.badge-cool{color:#8FBAFF;border-color:rgba(43,123,255,.4);background:rgba(43,123,255,.12)}
.metric-arrow{width:18px;height:18px;fill:none;stroke:var(--text-3);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:stroke .2s var(--ease),transform .2s var(--ease)}
.metric-row:hover .metric-arrow{stroke:var(--brand);transform:translateX(4px)}

/* ---------- 场景卡 ---------- */
.scene-grid{display:grid;grid-template-columns:1.15fr .95fr .9fr;gap:20px}
.scene-card{
  background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px;box-shadow:var(--shadow),var(--inset);
  transition:transform .22s var(--ease),border-color .22s var(--ease)
}
.scene-card:hover{transform:translateY(-4px);border-color:var(--line-hover)}
.scene-icon{
  width:44px;height:44px;border-radius:var(--r-sm);display:grid;place-items:center;margin-bottom:18px;
  border:1px solid rgba(31,227,194,.32);background:rgba(31,227,194,.08)
}
.scene-icon svg{width:22px;height:22px;fill:none;stroke:var(--brand);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.scene-card h3{font-size:20px;margin-bottom:10px}
.scene-card p{color:var(--text-2);font-size:15px;line-height:1.8}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.tag{font-size:12px;letter-spacing:.04em;padding:5px 10px;border-radius:6px;background:rgba(18,32,54,.75);border:1px solid var(--line);color:var(--text-2)}

/* ---------- 图卡轨道 ---------- */
.strip{
  display:flex;gap:18px;overflow-x:auto;padding:4px 4px 16px;
  scroll-snap-type:x mandatory;scrollbar-width:thin;scrollbar-color:rgba(31,227,194,.35) transparent
}
.strip::-webkit-scrollbar{height:6px}
.strip::-webkit-scrollbar-thumb{background:rgba(31,227,194,.3);border-radius:999px}
.strip::-webkit-scrollbar-track{background:rgba(120,180,220,.08);border-radius:999px}
.strip-card{
  flex:0 0 300px;scroll-snap-align:start;
  background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--shadow),var(--inset);
  transition:transform .22s var(--ease),border-color .22s var(--ease)
}
.strip-card:nth-child(2){flex-basis:340px}
.strip-card:nth-child(3){flex-basis:280px}
.strip-card:nth-child(4){flex-basis:320px}
.strip-card:hover{transform:translateY(-4px);border-color:var(--line-hover)}
.strip-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-panel-2)}
.strip-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.strip-card:hover .strip-media img{transform:scale(1.04)}
.strip-media::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(6,11,20,.75),rgba(6,11,20,0) 58%)}
.strip-tag{position:absolute;left:12px;top:12px;z-index:2}
.strip-body{padding:18px 20px 22px}
.strip-body h3{font-size:17px;line-height:1.5;margin-bottom:8px}
.strip-body p{color:var(--text-2);font-size:14px;line-height:1.7}
.strip-meta{margin-top:12px;font-size:13px;color:var(--text-3);display:flex;align-items:center;gap:8px}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:940px}
.faq-item{
  position:relative;border-radius:var(--r-md);overflow:hidden;
  background:var(--glass);-webkit-backdrop-filter:blur(14px) saturate(140%);backdrop-filter:blur(14px) saturate(140%);
  border:1px solid var(--line);
  transition:border-color .22s var(--ease),background .22s var(--ease)
}
.faq-item::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:3px;
  background:var(--brand);opacity:0;transition:opacity .22s var(--ease)
}
.faq-item.is-open{border-color:var(--line-hover)}
.faq-item.is-open::before{opacity:1}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 22px;text-align:left;font-size:16px;font-weight:600;color:var(--text-1);line-height:1.6
}
.faq-sign{
  position:relative;width:22px;height:22px;flex-shrink:0;border-radius:6px;
  border:1px solid var(--line);background:rgba(18,32,54,.7);
  transition:border-color .22s var(--ease),transform .22s var(--ease)
}
.faq-sign::before,.faq-sign::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--text-2);transform:translate(-50%,-50%);border-radius:2px;
  transition:background .22s var(--ease),opacity .22s var(--ease)
}
.faq-sign::before{width:10px;height:1.6px}
.faq-sign::after{width:1.6px;height:10px}
.faq-item.is-open .faq-sign{border-color:var(--line-hover);transform:rotate(180deg)}
.faq-item.is-open .faq-sign::before{background:var(--brand)}
.faq-item.is-open .faq-sign::after{opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s var(--ease)}
.faq-a p{padding:0 22px 20px;color:var(--text-2);font-size:15px;line-height:1.8}

/* ---------- 其他分类 ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.cat-card{
  display:flex;flex-direction:column;gap:12px;
  padding:24px;border-radius:var(--r-lg);
  background:var(--bg-panel);border:1px solid var(--line);
  color:var(--text-1);box-shadow:var(--shadow),var(--inset);
  transition:transform .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease)
}
.cat-card:hover{transform:translateY(-4px);border-color:var(--line-hover);text-decoration:none;background:var(--bg-panel-2)}
.cat-card svg{width:22px;height:22px;fill:none;stroke:var(--brand);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.cat-card h3{font-size:16px;line-height:1.5}
.cat-card p{font-size:13px;color:var(--text-3);line-height:1.7}
.cat-card.is-current{background:var(--bg-panel-2);border-color:var(--line-hover)}
.cat-card.is-current p{color:var(--brand)}

/* ---------- CTA ---------- */
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  padding:40px;border-radius:var(--r-xl);
  background:var(--bg-panel);border:1px solid var(--line);
  box-shadow:var(--shadow),var(--inset)
}
.cta-band h2{font-size:clamp(22px,2.4vw,28px);margin-bottom:10px}
.cta-band p{color:var(--text-2);font-size:15px;max-width:520px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:96px;background:#050912;border-top:1px solid var(--line)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding:64px 0 44px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;color:var(--text-1)}
.footer-brand .brand-name{font-size:15px;font-weight:700;color:#fff;display:block;line-height:1.3}
.footer-brand .brand-sub{font-size:11px;color:var(--text-3);display:block}
.footer-about{color:var(--text-2);font-size:14px;line-height:1.8}
.footer-links-inline{display:flex;gap:16px;margin-top:16px;flex-wrap:wrap}
.footer-links-inline a{font-size:13px}
.footer-col h4{font-size:14px;font-weight:600;color:var(--text-1);margin-bottom:18px}
.footer-col ul li{margin-bottom:12px}
.footer-col ul a{color:var(--text-2);font-size:14px}
.footer-col ul a:hover{color:var(--brand)}
.footer-sub{display:flex;gap:8px;margin-top:14px}
.footer-sub input{
  flex:1;min-width:0;padding:11px 14px;border-radius:var(--r-sm);
  background:rgba(9,16,28,.9);border:1px solid var(--line);color:var(--text-1);font-size:14px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease)
}
.footer-sub input::placeholder{color:var(--text-3)}
.footer-sub input:focus{outline:none;border-color:var(--line-hover);box-shadow:0 0 0 3px rgba(31,227,194,.14)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0 30px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3)
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .metric-num{font-size:36px}
  .scene-card,.cat-card{padding:24px}
}
@media (max-width:1023px){
  .container{padding:0 24px}
  .nav-toggle{display:block}
  .nav-actions{margin-left:auto}
  .nav-cards{
    position:absolute;left:0;right:0;top:calc(100% + 10px);
    flex-direction:column;align-items:stretch;gap:6px;
    margin-left:0;padding:10px;border-radius:var(--r-lg);
    background:rgba(8,15,26,.97);
    -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
    border:1px solid var(--line);box-shadow:var(--shadow);
    display:none;max-height:70vh;overflow-y:auto
  }
  .nav-cards.is-open{display:flex}
  .nav-cards .nav-card{width:100%;padding:13px 14px;font-size:14px;border-radius:var(--r-sm);border-color:rgba(120,180,220,.10);background:rgba(18,32,54,.4)}
  .scene-grid{grid-template-columns:1fr 1fr}
  .scene-grid .scene-card:last-child{grid-column:1 / -1}
  .cat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:52px 0 36px}
  .sec{padding-top:64px}
  .site-footer{margin-top:64px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  body{font-size:15px}
  .sec{padding-top:48px}
  .site-footer{margin-top:48px}
  .brand-sub{display:none}
  .cat-hero{min-height:auto}
  .cat-hero .container{padding-top:26px;padding-bottom:26px}
  .metric-row{grid-template-columns:64px minmax(0,1fr);gap:14px 16px;padding:22px 4px}
  .metric-num{font-size:30px}
  .metric-side{grid-column:2;justify-content:flex-start}
  .scene-grid{grid-template-columns:1fr}
  .scene-grid .scene-card:last-child{grid-column:auto}
  .strip-card,.strip-card:nth-child(2),.strip-card:nth-child(3),.strip-card:nth-child(4){flex-basis:82%}
  .cat-grid{grid-template-columns:1fr}
  .cta-band{padding:28px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding:44px 0 30px}
  .faq-q{font-size:15px;padding:18px 18px}
  .faq-a p{padding:0 18px 18px;font-size:14px}
}
@media (max-width:479px){
  .badge{white-space:normal;line-height:1.4}
  .metric-num{font-size:26px}
  .faq-q{padding:16px;gap:12px}
  .faq-a p{padding:0 16px 16px}
  .btn{padding:10px 18px;font-size:13px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}