/* roulang page: index */
:root{
    --bg:#070C1A; --bg-2:#0D1730; --panel:rgba(255,255,255,0.055);
    --line:rgba(255,255,255,0.10); --line-hi:rgba(53,229,195,0.45);
    --text:#ECF2FF; --muted:#9AA9C6; --dim:#6B7A99;
    --accent:#35E5C3; --accent-2:#2AB3FF; --warn:#FF8A65;
    --radius-lg:20px; --radius-sm:14px;
    --shadow:0 20px 60px -24px rgba(4,12,32,0.9);
    --ease:cubic-bezier(.2,.7,.3,1);
  }
  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0; background:var(--bg); color:var(--text);
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
    font-size:16px; line-height:1.75; -webkit-font-smoothing:antialiased;
    background-image:
      radial-gradient(900px 520px at 8% 0%, rgba(18,34,80,0.65) 0%, rgba(7,12,26,0) 62%),
      radial-gradient(760px 460px at 96% 22%, rgba(11,58,58,0.55) 0%, rgba(7,12,26,0) 60%);
    background-repeat:no-repeat;
  }
  a{color:inherit;text-decoration:none}
  img{max-width:100%;display:block}
  button,input,select,textarea{font:inherit;color:inherit}
  h1,h2,h3,h4{letter-spacing:-0.02em;font-weight:700;margin:0}
  h1{font-size:clamp(30px,4.2vw,54px);line-height:1.15}
  h2{font-size:clamp(22px,2.6vw,32px);line-height:1.28}
  h3{font-size:19px;line-height:1.4}
  p{margin:0}
  :focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
  .wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
  @media(min-width:768px){.wrap{padding:0 32px}}
  .num{font-variant-numeric:tabular-nums}

  /* 导航 */
  .site-head{position:sticky;top:12px;z-index:60;padding:0 16px;margin-top:16px}
  @media(min-width:768px){.site-head{padding:0 24px}}
  .nav-shell{
    max-width:1200px;margin:0 auto;display:flex;align-items:center;gap:18px;
    padding:12px 16px;border-radius:18px;border:1px solid var(--line);
    background:rgba(9,15,32,0.72);backdrop-filter:blur(16px) saturate(150%);
    box-shadow:0 18px 44px -26px rgba(4,12,32,0.95);
    transition:background 200ms var(--ease),box-shadow 200ms var(--ease);
  }
  .site-head.is-stuck .nav-shell{background:rgba(6,10,24,0.92);box-shadow:0 22px 52px -22px rgba(0,0,0,0.9)}
  .brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;min-height:44px}
  .brand-mark{
    width:34px;height:34px;border-radius:11px;flex:0 0 auto;
    background:linear-gradient(135deg,var(--accent),var(--accent-2));
    box-shadow:0 0 0 1px rgba(255,255,255,0.22),0 10px 24px -10px rgba(53,229,195,0.6);
    display:grid;place-items:center;color:#04202A;font-weight:800;font-size:15px;
  }
  .brand-text{display:flex;flex-direction:column;line-height:1.2}
  .brand-name{font-weight:700;font-size:15px;letter-spacing:-0.01em;white-space:nowrap}
  .brand-sub{font-size:11px;color:var(--dim);letter-spacing:0.04em}
  .nav-links{display:none;align-items:center;gap:4px;margin-left:auto}
  @media(min-width:1024px){.nav-links{display:flex}}
  .nav-links a{
    position:relative;padding:10px 12px;border-radius:10px;font-size:14px;color:var(--muted);
    min-height:44px;display:inline-flex;align-items:center;
    transition:color 200ms var(--ease),background 200ms var(--ease);
  }
  .nav-links a:hover{color:var(--text);background:rgba(255,255,255,0.06)}
  .nav-links a.active{color:var(--accent)}
  .nav-links a.active::after{
    content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;border-radius:2px;
    background:var(--accent);box-shadow:0 0 10px rgba(53,229,195,0.7);
  }
  .nav-cta{
    margin-left:auto;display:none;
    padding:11px 18px;border-radius:12px;font-size:14px;font-weight:600;color:#04202A;
    background:linear-gradient(135deg,#35E5C3,#2AB3FF);
    box-shadow:inset 0 0 0 1px rgba(255,255,255,0.25),0 10px 30px -8px rgba(53,229,195,0.5);
    transition:filter 200ms var(--ease),box-shadow 200ms var(--ease),transform 200ms var(--ease);
    min-height:44px;align-items:center;
  }
  @media(min-width:1024px){.nav-cta{display:inline-flex}}
  .nav-cta:hover{filter:brightness(1.04);box-shadow:inset 0 0 0 1px rgba(255,255,255,0.3),0 14px 38px -8px rgba(53,229,195,0.68)}
  .nav-cta:active{transform:translateY(0);box-shadow:0 6px 18px -8px rgba(53,229,195,0.45)}
  .burger{
    margin-left:auto;width:44px;height:44px;display:grid;place-items:center;
    border-radius:12px;border:1px solid var(--line);background:rgba(255,255,255,0.05);cursor:pointer;
    transition:border-color 200ms var(--ease),background 200ms var(--ease);
  }
  .burger:hover{border-color:var(--line-hi);background:rgba(53,229,195,0.08)}
  @media(min-width:1024px){.burger{display:none}}
  .burger span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;position:relative}
  .burger span::before,.burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px}
  .burger span::before{top:-6px}.burger span::after{top:6px}
  .drawer{
    position:fixed;inset:0;z-index:80;display:none;
    background:rgba(4,8,18,0.86);backdrop-filter:blur(14px);
    padding:88px 20px 32px;
  }
  .drawer.open{display:block}
  .drawer-inner{max-width:520px;margin:0 auto;border:1px solid var(--line);border-radius:20px;background:rgba(10,16,34,0.9);padding:16px}
  .drawer a{
    display:flex;align-items:center;justify-content:flex-end;height:48px;padding:0 12px;font-size:15px;color:var(--text);
    border-bottom:1px solid rgba(255,255,255,0.08);
  }
  .drawer a:last-of-type{border-bottom:0}
  .drawer .drawer-cta{
    justify-content:center;margin-top:12px;border-radius:12px;font-weight:600;color:#04202A;
    background:linear-gradient(135deg,#35E5C3,#2AB3FF);border-bottom:0;
  }
  body.locked{overflow:hidden}

  /* 通用 */
  .glass{
    background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg);
    backdrop-filter:blur(14px) saturate(140%);box-shadow:var(--shadow);
    transition:border-color 200ms var(--ease),transform 200ms var(--ease),box-shadow 200ms var(--ease);
  }
  .glass-sm{border-radius:var(--radius-sm)}
  .glass:hover{border-color:var(--line-hi);transform:translateY(-2px)}
  .sec{padding:64px 0}
  @media(min-width:768px){.sec{padding:96px 0}}
  .sec-alt{background:var(--bg-2);border-top:1px solid rgba(255,255,255,0.05);border-bottom:1px solid rgba(255,255,255,0.05)}
  .kicker{
    display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:0.12em;
    color:var(--accent);text-transform:uppercase;font-weight:600;margin-bottom:14px;
  }
  .kicker::before{content:"";width:18px;height:1px;background:var(--accent);box-shadow:0 0 8px rgba(53,229,195,0.8)}
  .lead{color:var(--muted);font-size:15px;line-height:1.85}
  .sec-head{max-width:720px;margin-bottom:32px}
  @media(min-width:768px){.sec-head{margin-bottom:44px}}
  .pill{
    display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px;
    font-size:12.5px;color:var(--muted);border:1px solid var(--line);background:rgba(255,255,255,0.045);
    transition:color 200ms var(--ease),border-color 200ms var(--ease),box-shadow 200ms var(--ease);
  }
  .pill:hover{color:var(--accent);border-color:var(--line-hi);box-shadow:0 0 16px -4px rgba(53,229,195,0.5)}
  .tag{
    display:inline-block;padding:4px 10px;border-radius:999px;font-size:12px;font-weight:600;
    background:rgba(53,229,195,0.12);color:var(--accent);border:1px solid rgba(53,229,195,0.28);
  }
  .tag-warn{background:rgba(255,138,101,0.13);color:var(--warn);border-color:rgba(255,138,101,0.32)}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:46px;padding:12px 22px;border-radius:12px;font-size:15px;font-weight:600;
    cursor:pointer;border:1px solid transparent;
    transition:filter 200ms var(--ease),box-shadow 200ms var(--ease),transform 200ms var(--ease),border-color 200ms var(--ease),background 200ms var(--ease);
  }
  .btn-main{
    color:#04202A;background:linear-gradient(135deg,#35E5C3,#2AB3FF);
    box-shadow:inset 0 0 0 1px rgba(255,255,255,0.25),0 10px 30px -8px rgba(53,229,195,0.5);
  }
  .btn-main:hover{filter:brightness(1.04);box-shadow:inset 0 0 0 1px rgba(255,255,255,0.3),0 16px 40px -10px rgba(53,229,195,0.7)}
  .btn-main:active{transform:translateY(1px);box-shadow:inset 0 0 0 1px rgba(255,255,255,0.2),0 6px 16px -8px rgba(53,229,195,0.5)}
  .btn-ghost{
    color:var(--text);background:rgba(255,255,255,0.05);border-color:var(--line);
  }
  .btn-ghost:hover{border-color:var(--accent);background:rgba(53,229,195,0.09);color:var(--text)}
  .btn-ghost:active{transform:translateY(1px)}
  .btn[disabled]{opacity:.45;cursor:not-allowed}
  .grid-3{display:grid;grid-template-columns:1fr;gap:20px}
  @media(min-width:640px){.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media(min-width:1024px){.grid-3{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}}
  .grid-2{display:grid;grid-template-columns:1fr;gap:20px}
  @media(min-width:768px){.grid-2{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}}
  .divider{height:1px;background:linear-gradient(90deg,rgba(255,255,255,0.14),rgba(255,255,255,0.02));border:0;margin:0}

  /* Hero */
  .hero{padding-top:32px;padding-bottom:56px}
  @media(min-width:768px){.hero{padding-top:44px;padding-bottom:80px}}
  .hero-grid{display:grid;grid-template-columns:1fr;gap:32px;align-items:start}
  @media(min-width:1024px){.hero-grid{grid-template-columns:1.05fr 0.95fr;gap:44px}}
  .hero-title-accent{
    background:linear-gradient(120deg,#35E5C3 0%,#7DF0DC 45%,#2AB3FF 100%);
    -webkit-background-clip:text;background-clip:text;color:transparent;
  }
  .hero-lead{margin-top:18px;color:var(--muted);font-size:15.5px;line-height:1.9;max-width:620px}
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
  .hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
  .hero-panel{padding:18px}
  .hero-visual{
    position:relative;border-radius:18px;overflow:hidden;border:1px solid var(--line);
    background:#0a1226;aspect-ratio:16/11;
  }
  .hero-visual img{width:100%;height:100%;object-fit:cover;opacity:.78}
  .hero-visual::after{
    content:"";position:absolute;inset:0;
    background:
      linear-gradient(180deg,rgba(7,12,26,0.15),rgba(7,12,26,0.85)),
      repeating-linear-gradient(0deg,rgba(255,255,255,0.045) 0 1px,transparent 1px 26px),
      repeating-linear-gradient(90deg,rgba(255,255,255,0.045) 0 1px,transparent 1px 26px);
    pointer-events:none;
  }
  .hero-visual-cap{
    position:absolute;left:14px;right:14px;bottom:14px;z-index:2;
    padding:12px 14px;border-radius:12px;border:1px solid var(--line);
    background:rgba(8,14,30,0.74);backdrop-filter:blur(10px);
  }
  .board{margin-top:16px;border-radius:14px;border:1px solid var(--line);background:rgba(255,255,255,0.035);padding:14px 16px}
  .board-row{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    padding:11px 0;border-bottom:1px dashed rgba(255,255,255,0.09);font-size:13.5px;
  }
  .board-row:last-child{border-bottom:0;padding-bottom:0}
  .board-row:first-child{padding-top:0}
  .board-row span:first-child{color:var(--muted)}

  /* 指标 */
  .stat-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
  @media(min-width:768px){.stat-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}}
  .stat{padding:18px 16px;border-radius:var(--radius-sm)}
  .stat-num{font-size:clamp(26px,3.4vw,38px);font-weight:700;line-height:1.1;color:var(--text)}
  .stat-num em{font-style:normal;font-size:14px;color:var(--accent);margin-left:4px;font-weight:600}
  .stat-label{margin-top:6px;font-size:12.5px;color:var(--dim);letter-spacing:0.02em}

  /* 卡片 */
  .card{padding:22px;display:flex;flex-direction:column;height:100%}
  .card-icon{
    width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
    background:rgba(53,229,195,0.12);border:1px solid rgba(53,229,195,0.26);color:var(--accent);
    margin-bottom:14px;flex:0 0 auto;
  }
  .card h3{margin-bottom:10px}
  .card p{color:var(--muted);font-size:14.5px;line-height:1.8}
  .card-link{
    margin-top:auto;padding-top:16px;font-size:13.5px;font-weight:600;color:var(--accent);
    display:inline-flex;align-items:center;gap:6px;transition:gap 200ms var(--ease),color 200ms var(--ease);
  }
  .card-link:hover{gap:10px;color:#7DF0DC}
  .card-link::after{content:"→";font-size:13px}

  /* 流程 */
  .flow{display:grid;grid-template-columns:1fr;gap:16px;margin-top:8px}
  @media(min-width:1024px){.flow{grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}}
  .flow-step{position:relative;padding:22px 20px;border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--panel)}
  @media(min-width:1024px){
    .flow-step::after{
      content:"";position:absolute;top:44px;right:-20px;width:20px;height:1px;
      background:linear-gradient(90deg,rgba(53,229,195,0.7),rgba(53,229,195,0));
    }
    .flow-step:last-child::after{display:none}
  }
  @media(max-width:1023px){
    .flow-step{margin-left:18px;border-left:2px solid rgba(53,229,195,0.35)}
  }
  .flow-badge{
    display:inline-grid;place-items:center;width:34px;height:34px;border-radius:10px;
    font-size:14px;font-weight:700;color:#04202A;background:linear-gradient(135deg,#35E5C3,#2AB3FF);
    box-shadow:0 8px 20px -10px rgba(53,229,195,0.8);margin-bottom:12px;
  }
  .flow-step h3{font-size:16.5px;margin-bottom:8px}
  .flow-step p{font-size:14px;color:var(--muted);line-height:1.75}

  /* 对比 */
  .compare{display:grid;grid-template-columns:1fr;gap:20px}
  @media(min-width:768px){.compare{grid-template-columns:repeat(2,minmax(0,1fr))}}
  .compare-card{padding:24px;border-radius:var(--radius-lg);border:1px solid var(--line);background:var(--panel)}
  .compare-card.warn{border-color:rgba(255,138,101,0.28);background:rgba(255,138,101,0.055)}
  .compare-card.good{border-color:rgba(53,229,195,0.28);background:rgba(53,229,195,0.05)}
  .compare-card h3{margin:12px 0 14px;font-size:18px}
  .compare-list{list-style:none;padding:0;margin:0;display:grid;gap:12px}
  .compare-list li{position:relative;padding-left:22px;font-size:14.5px;color:var(--muted);line-height:1.75}
  .compare-list li::before{
    content:"";position:absolute;left:0;top:8px;width:7px;height:7px;border-radius:50%;
    background:var(--dim);box-shadow:0 0 0 3px rgba(255,255,255,0.05);
  }
  .compare-card.warn .compare-list li::before{background:var(--warn);box-shadow:0 0 0 3px rgba(255,138,101,0.16)}
  .compare-card.good .compare-list li::before{background:var(--accent);box-shadow:0 0 0 3px rgba(53,229,195,0.16)}

  /* 时间线 */
  .timeline{position:relative;margin-top:10px;padding-left:26px}
  .timeline::before{
    content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;
    background:linear-gradient(180deg,rgba(53,229,195,0.65),rgba(42,179,255,0.18));
  }
  .tl-item{position:relative;padding:0 0 26px 8px}
  .tl-item:last-child{padding-bottom:0}
  .tl-item::before{
    content:"";position:absolute;left:-26px;top:6px;width:12px;height:12px;border-radius:50%;
    background:#070C1A;border:2px solid var(--accent);
    box-shadow:0 0 0 4px rgba(53,229,195,0.12),0 0 16px rgba(53,229,195,0.6);
  }
  .tl-day{font-size:12px;letter-spacing:0.08em;color:var(--accent);font-weight:600;margin-bottom:4px}
  .tl-item h3{font-size:16px;margin-bottom:6px}
  .tl-item p{font-size:14px;color:var(--muted);line-height:1.78}

  /* 安全 */
  .safety-board{
    padding:26px;border-radius:var(--radius-lg);border:1px solid rgba(255,138,101,0.28);
    background:linear-gradient(160deg,rgba(255,138,101,0.09),rgba(255,138,101,0.03));
  }
  @media(min-width:768px){.safety-board{padding:32px}}
  .safety-grid{display:grid;grid-template-columns:1fr;gap:14px;margin-top:22px}
  @media(min-width:640px){.safety-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media(min-width:1024px){.safety-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
  .safety-item{
    display:flex;gap:12px;padding:16px;border-radius:var(--radius-sm);
    background:rgba(7,12,26,0.42);border:1px solid rgba(255,138,101,0.16);
    transition:border-color 200ms var(--ease),background 200ms var(--ease);
  }
  .safety-item:hover{border-color:rgba(255,138,101,0.42);background:rgba(255,138,101,0.07)}
  .safety-ico{
    width:32px;height:32px;flex:0 0 auto;border-radius:9px;display:grid;place-items:center;
    background:rgba(255,138,101,0.16);color:var(--warn);font-weight:700;font-size:13px;
  }
  .safety-item h3{font-size:15px;margin-bottom:4px}
  .safety-item p{font-size:13.5px;color:var(--muted);line-height:1.7}

  /* 场景 */
  .scene-grid{display:grid;grid-template-columns:1fr;gap:14px}
  @media(min-width:640px){.scene-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media(min-width:1024px){.scene-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}}
  .scene{
    display:flex;flex-direction:column;border-radius:var(--radius-sm);overflow:hidden;
    border:1px solid var(--line);background:var(--panel);transition:border-color 200ms var(--ease),transform 200ms var(--ease);
  }
  .scene:hover{border-color:var(--line-hi);transform:translateY(-2px)}
  .scene-thumb{aspect-ratio:16/10;overflow:hidden;background:#0a1226}
  .scene-thumb img{width:100%;height:100%;object-fit:cover;opacity:.85;transition:transform 400ms var(--ease),opacity 400ms var(--ease)}
  .scene:hover .scene-thumb img{transform:scale(1.04);opacity:1}
  .scene-body{padding:14px 16px 16px}
  .scene-body h3{font-size:15px;margin-bottom:6px}
  .scene-body p{font-size:13px;color:var(--muted);line-height:1.7}

  /* CMS 列表 */
  .post-grid{display:grid;grid-template-columns:1fr;gap:20px}
  @media(min-width:640px){.post-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media(min-width:1024px){.post-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}}
  .post-card{
    padding:20px;border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--panel);
    display:flex;flex-direction:column;height:100%;
    transition:border-color 200ms var(--ease),transform 200ms var(--ease),box-shadow 200ms var(--ease);
  }
  .post-card:hover{border-color:var(--line-hi);transform:translateY(-2px);box-shadow:0 18px 40px -26px rgba(53,229,195,0.6)}
  .post-card h3{
    font-size:16px;line-height:1.5;margin:12px 0 10px;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .post-card .excerpt{
    font-size:13.5px;color:var(--muted);line-height:1.75;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .post-meta{
    display:flex;align-items:center;justify-content:space-between;gap:10px;
    margin-top:auto;padding-top:14px;font-size:12px;color:var(--dim);
    border-top:1px solid rgba(255,255,255,0.07);
  }
  .empty-note{
    padding:32px 20px;text-align:center;border-radius:var(--radius-sm);
    border:1px dashed rgba(255,255,255,0.16);color:var(--muted);font-size:14px;
  }

  /* 保障 */
  .guard-card{padding:22px;border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--panel)}
  .guard-card h3{font-size:16.5px;margin:12px 0 8px}
  .guard-card p{font-size:14px;color:var(--muted);line-height:1.8}

  /* 快速解答 chips */
  .chips{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px}
  .chip{
    padding:10px 16px;border-radius:999px;font-size:13.5px;color:var(--muted);cursor:pointer;
    border:1px solid var(--line);background:rgba(255,255,255,0.04);min-height:44px;
    display:inline-flex;align-items:center;
    transition:color 200ms var(--ease),border-color 200ms var(--ease),box-shadow 200ms var(--ease),background 200ms var(--ease);
  }
  .chip:hover,.chip:focus-visible{color:var(--accent);border-color:var(--line-hi);box-shadow:0 0 18px -4px rgba(53,229,195,0.55);background:rgba(53,229,195,0.07)}
  .chip.active{color:#04202A;background:linear-gradient(135deg,#35E5C3,#2AB3FF);border-color:transparent;font-weight:600}
  .chip-answer{
    padding:20px;border-radius:var(--radius-sm);border:1px solid rgba(53,229,195,0.28);
    background:rgba(53,229,195,0.06);font-size:14.5px;color:var(--muted);line-height:1.85;min-height:96px;
  }
  .chip-answer strong{color:var(--text);font-weight:600}

  /* FAQ */
  .faq{display:grid;gap:12px}
  .faq-item{border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--panel);overflow:hidden;transition:border-color 200ms var(--ease)}
  .faq-item:hover{border-color:rgba(53,229,195,0.3)}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:0 18px;min-height:56px;background:transparent;border:0;cursor:pointer;text-align:left;
    font-size:15px;font-weight:600;color:var(--text);transition:color 200ms var(--ease);
  }
  .faq-q:hover{color:var(--accent)}
  .faq-sign{
    flex:0 0 auto;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;
    border:1px solid var(--line);font-size:14px;color:var(--accent);
    transition:transform 200ms var(--ease),background 200ms var(--ease);
  }
  .faq-item.open .faq-sign{transform:rotate(180deg);background:rgba(53,229,195,0.12)}
  .faq-a{max-height:0;overflow:hidden;transition:max-height 200ms var(--ease)}
  .faq-a-inner{padding:0 18px 18px;font-size:14px;color:var(--muted);line-height:1.85}

  /* 下载 */
  .dl-grid{display:grid;grid-template-columns:1fr;gap:18px}
  @media(min-width:768px){.dl-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
  .dl-card{
    padding:22px;border-radius:var(--radius-lg);border:1px solid var(--line);background:var(--panel);
    display:flex;flex-direction:column;gap:12px;
    transition:border-color 200ms var(--ease),transform 200ms var(--ease),box-shadow 200ms var(--ease);
  }
  .dl-card:hover{border-color:var(--line-hi);transform:translateY(-2px);box-shadow:0 20px 44px -26px rgba(53,229,195,0.6)}
  .dl-top{display:flex;align-items:center;gap:12px}
  .dl-badge{
    width:40px;height:40px;border-radius:11px;display:grid;place-items:center;flex:0 0 auto;
    background:rgba(53,229,195,0.12);border:1px solid rgba(53,229,195,0.26);color:var(--accent);font-weight:700;font-size:13px;
  }
  .dl-card h3{font-size:17px}
  .dl-card .dl-note{font-size:13px;color:var(--muted);line-height:1.75}
  .dl-meta{font-size:12px;color:var(--dim)}
  .dl-card .btn{width:100%;margin-top:auto}

  /* 表单 */
  .form-shell{padding:26px;border-radius:var(--radius-lg);border:1px solid var(--line);background:var(--panel)}
  @media(min-width:768px){.form-shell{padding:32px}}
  .field{margin-bottom:16px}
  .field label{display:block;font-size:13px;color:var(--muted);margin-bottom:7px}
  .field input,.field select{
    width:100%;min-height:46px;padding:11px 14px;border-radius:12px;
    background:rgba(255,255,255,0.055);border:1px solid var(--line);color:var(--text);
    transition:border-color 200ms var(--ease),box-shadow 200ms var(--ease),background 200ms var(--ease);
  }
  .field input::placeholder{color:var(--dim)}
  .field input:focus,.field select:focus{
    outline:none;border-color:var(--accent);background:rgba(53,229,195,0.07);
    box-shadow:0 0 0 3px rgba(53,229,195,0.16),0 0 22px -6px rgba(53,229,195,0.55);
  }
  .field select option{background:#0D1730;color:#ECF2FF}
  .form-hint{font-size:12.5px;color:var(--dim);margin-top:12px;line-height:1.7}
  .form-msg{font-size:13.5px;color:var(--accent);margin-top:12px;display:none}

  /* 收束 */
  .closing{
    padding:26px;border-radius:var(--radius-lg);border:1px solid var(--line);
    background:linear-gradient(135deg,rgba(53,229,195,0.09),rgba(42,179,255,0.05));
    display:flex;flex-direction:column;gap:18px;
  }
  @media(min-width:768px){.closing{flex-direction:row;align-items:center;justify-content:space-between;padding:30px 34px}}
  .closing-links{display:flex;flex-wrap:wrap;gap:10px}

  /* 页脚 */
  .site-foot{background:#050912;border-top:1px solid rgba(255,255,255,0.08);padding:48px 0 28px;margin-top:0}
  .foot-grid{display:grid;grid-template-columns:1fr;gap:32px}
  @media(min-width:768px){.foot-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:28px}}
  .foot-brand p{font-size:13.5px;color:var(--muted);line-height:1.85;margin-top:12px;max-width:320px}
  .foot-col h4{font-size:13px;color:var(--text);letter-spacing:0.06em;margin-bottom:14px;font-weight:600}
  .foot-col ul{list-style:none;margin:0;padding:0;display:grid;gap:10px}
  .foot-col a{font-size:13.5px;color:var(--muted);transition:color 200ms var(--ease)}
  .foot-col a:hover{color:var(--accent)}
  .foot-bottom{
    margin-top:34px;padding-top:20px;border-top:1px solid rgba(255,255,255,0.07);
    display:flex;flex-direction:column;gap:8px;font-size:12.5px;color:var(--dim);
  }
  @media(min-width:768px){.foot-bottom{flex-direction:row;align-items:center;justify-content:space-between}}
  .to-top{
    display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:0 14px;border-radius:10px;
    border:1px solid var(--line);color:var(--muted);font-size:13px;
    transition:border-color 200ms var(--ease),color 200ms var(--ease);
  }
  .to-top:hover{border-color:var(--accent);color:var(--accent)}

/* roulang page: article */
:root{
    --bg:#070C1A; --bg-2:#0D1730; --panel:rgba(255,255,255,0.055);
    --line:rgba(255,255,255,0.10); --line-hi:rgba(53,229,195,0.45);
    --text:#ECF2FF; --muted:#9AA9C6; --dim:#6B7A99;
    --accent:#35E5C3; --accent-2:#2AB3FF; --warn:#FF8A65;
    --radius-lg:20px; --radius-sm:14px;
    --shadow:0 20px 60px -24px rgba(4,12,32,0.9);
    --ease:cubic-bezier(.2,.7,.3,1);
  }
  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0; background:var(--bg); color:var(--text);
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
    font-size:16px; line-height:1.75; -webkit-font-smoothing:antialiased;
    background-image:
      radial-gradient(900px 520px at 8% 0%, rgba(18,34,80,0.65) 0%, rgba(7,12,26,0) 62%),
      radial-gradient(760px 460px at 96% 22%, rgba(11,58,58,0.55) 0%, rgba(7,12,26,0) 60%);
    background-repeat:no-repeat;
    background-attachment:fixed;
  }
  a{color:inherit;text-decoration:none}
  img{max-width:100%;display:block}
  button,input,select,textarea{font:inherit;color:inherit}
  a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:8px}

  .wrap{max-width:1200px;margin:0 auto;padding:0 20px;width:100%}
  @media (min-width:768px){.wrap{padding:0 32px}}

  /* 导航 */
  .site-head{position:sticky;top:12px;z-index:60;padding:0 16px;margin:16px 0 0;transition:box-shadow 200ms var(--ease)}
  .nav-shell{
    max-width:1200px;margin:0 auto;display:flex;align-items:center;gap:16px;
    padding:10px 14px;border-radius:18px;border:1px solid var(--line);
    background:rgba(9,15,32,0.72);backdrop-filter:blur(16px) saturate(150%);
    box-shadow:0 18px 44px -26px rgba(4,12,32,0.95);
    transition:background 200ms var(--ease),box-shadow 200ms var(--ease);
  }
  .site-head.is-stuck .nav-shell{background:rgba(6,10,24,0.93);box-shadow:0 22px 52px -22px rgba(0,0,0,0.9)}
  .brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;min-height:44px}
  .brand-mark{
    width:34px;height:34px;border-radius:11px;flex:0 0 auto;
    background:linear-gradient(135deg,var(--accent),var(--accent-2));
    box-shadow:0 0 0 1px rgba(255,255,255,0.22),0 10px 24px -10px rgba(53,229,195,0.6);
    display:grid;place-items:center;color:#04202A;font-weight:800;font-size:15px;
  }
  .brand-text{display:flex;flex-direction:column;line-height:1.2;min-width:0}
  .brand-name{font-weight:700;font-size:15px;letter-spacing:-0.01em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .brand-sub{font-size:11px;color:var(--dim);letter-spacing:0.04em}
  .nav-links{display:none;align-items:center;gap:2px;margin-left:auto}
  .nav-links a{
    position:relative;padding:10px 11px;border-radius:10px;font-size:14px;color:var(--muted);
    min-height:44px;display:inline-flex;align-items:center;white-space:nowrap;
    transition:color 200ms var(--ease),background 200ms var(--ease);
  }
  .nav-links a:hover{color:var(--text);background:rgba(255,255,255,0.06)}
  .nav-links a.active{color:var(--accent)}
  .nav-links a.active::after{
    content:"";position:absolute;left:11px;right:11px;bottom:4px;height:2px;border-radius:2px;
    background:var(--accent);box-shadow:0 0 10px rgba(53,229,195,0.7);
  }
  .nav-cta{
    display:none;padding:11px 18px;border-radius:12px;font-size:14px;font-weight:600;color:#04202A;
    background:linear-gradient(135deg,#35E5C3,#2AB3FF);
    box-shadow:inset 0 0 0 1px rgba(255,255,255,0.25),0 10px 30px -8px rgba(53,229,195,0.5);
    transition:filter 200ms var(--ease),box-shadow 200ms var(--ease),transform 200ms var(--ease);
    min-height:44px;align-items:center;white-space:nowrap;
  }
  .nav-cta:hover{filter:brightness(1.04);box-shadow:inset 0 0 0 1px rgba(255,255,255,0.3),0 14px 38px -8px rgba(53,229,195,0.68)}
  .nav-cta:active{transform:translateY(0);box-shadow:0 6px 18px -8px rgba(53,229,195,0.45)}
  .nav-burger{
    margin-left:auto;display:inline-flex;align-items:center;justify-content:center;
    width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
    background:rgba(255,255,255,0.05);color:var(--text);cursor:pointer;
    transition:border-color 200ms var(--ease),background 200ms var(--ease);
  }
  .nav-burger:hover{border-color:var(--line-hi);background:rgba(53,229,195,0.10)}
  @media (min-width:1024px){
    .nav-links{display:flex}
    .nav-cta{display:inline-flex;margin-left:6px}
    .nav-burger{display:none}
  }
  .drawer{
    position:fixed;inset:0;z-index:80;display:none;
    background:rgba(4,8,18,0.88);backdrop-filter:blur(14px);
    padding:88px 20px 32px;
  }
  .drawer.open{display:block}
  .drawer-inner{max-width:520px;margin:0 auto;border:1px solid var(--line);border-radius:20px;background:rgba(10,16,34,0.94);padding:14px}
  .drawer a{
    display:flex;align-items:center;justify-content:flex-end;height:48px;padding:0 12px;font-size:15px;color:var(--text);
    border-bottom:1px solid rgba(255,255,255,0.08);
  }
  .drawer a:last-of-type{border-bottom:0}
  .drawer .drawer-cta{
    justify-content:center;margin-top:12px;border-radius:12px;font-weight:600;color:#04202A;
    background:linear-gradient(135deg,#35E5C3,#2AB3FF);border-bottom:0;
  }
  .drawer-close{
    position:absolute;top:22px;right:22px;width:44px;height:44px;border-radius:12px;
    border:1px solid var(--line);background:rgba(255,255,255,0.06);color:var(--text);cursor:pointer;
  }
  body.locked{overflow:hidden}

  /* 通用组件 */
  .pill{
    display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px;
    font-size:12.5px;color:var(--muted);border:1px solid var(--line);background:rgba(255,255,255,0.045);
    transition:color 200ms var(--ease),border-color 200ms var(--ease),box-shadow 200ms var(--ease);
  }
  .pill:hover{color:var(--accent);border-color:var(--line-hi);box-shadow:0 0 16px -4px rgba(53,229,195,0.5)}
  .tag{
    display:inline-block;padding:4px 10px;border-radius:999px;font-size:12px;font-weight:600;
    background:rgba(53,229,195,0.12);color:var(--accent);border:1px solid rgba(53,229,195,0.28);
  }
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:46px;padding:12px 22px;border-radius:12px;font-size:15px;font-weight:600;
    cursor:pointer;border:1px solid transparent;
    transition:filter 200ms var(--ease),box-shadow 200ms var(--ease),transform 200ms var(--ease),border-color 200ms var(--ease),background 200ms var(--ease);
  }
  .btn-main{
    color:#04202A;background:linear-gradient(135deg,#35E5C3,#2AB3FF);
    box-shadow:inset 0 0 0 1px rgba(255,255,255,0.25),0 10px 30px -8px rgba(53,229,195,0.5);
  }
  .btn-main:hover{filter:brightness(1.04);box-shadow:inset 0 0 0 1px rgba(255,255,255,0.3),0 16px 40px -10px rgba(53,229,195,0.7)}
  .btn-main:active{transform:translateY(1px);box-shadow:inset 0 0 0 1px rgba(255,255,255,0.2),0 6px 16px -8px rgba(53,229,195,0.5)}
  .btn-ghost{color:var(--text);background:rgba(255,255,255,0.05);border-color:var(--line)}
  .btn-ghost:hover{border-color:var(--accent);background:rgba(53,229,195,0.09);color:var(--text)}
  .btn-ghost:active{transform:translateY(1px)}

  /* 文章页布局 */
  .read-wrap{padding-top:22px;padding-bottom:72px}
  .crumb{
    display:flex;flex-wrap:wrap;align-items:center;gap:8px;
    font-size:13px;color:var(--dim);margin-bottom:22px;line-height:1.6;
  }
  .crumb a{color:var(--muted);transition:color 200ms var(--ease)}
  .crumb a:hover{color:var(--accent)}
  .crumb span[aria-hidden]{color:rgba(255,255,255,0.20)}
  .crumb-cur{color:var(--text);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

  .read-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:32px;align-items:start}
  @media (min-width:1024px){
    .read-layout{grid-template-columns:minmax(0,760px) 282px;justify-content:center;gap:44px}
  }
  .read-main{min-width:0;max-width:760px;width:100%;margin:0 auto}

  .art-head{padding-bottom:22px;border-bottom:1px solid var(--line);margin-bottom:28px}
  .art-chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
  .art-title{
    font-size:clamp(26px,3.6vw,42px);line-height:1.25;font-weight:700;
    letter-spacing:-0.02em;margin:0 0 14px;overflow-wrap:anywhere;
  }
  .art-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--dim)}
  .art-time{color:var(--muted);font-variant-numeric:tabular-nums}
  .art-dot{color:rgba(255,255,255,0.22)}

  /* 正文排版 */
  .prose-body{font-size:16px;line-height:1.85;color:#D9E3F7;overflow-wrap:break-word}
  .prose-body p{margin:0 0 1em}
  .prose-body h2{
    position:relative;font-size:clamp(20px,2.2vw,26px);font-weight:700;letter-spacing:-0.01em;
    margin:1.9em 0 0.75em;padding-left:15px;color:var(--text);scroll-margin-top:110px;
  }
  .prose-body h2::before{
    content:"";position:absolute;left:0;top:0.2em;bottom:0.2em;width:3px;border-radius:3px;
    background:linear-gradient(180deg,var(--accent),var(--accent-2));
    box-shadow:0 0 12px rgba(53,229,195,0.65);
  }
  .prose-body h3{font-size:18px;line-height:1.5;font-weight:700;margin:1.6em 0 0.6em;color:var(--text)}
  .prose-body h4{font-size:16px;font-weight:700;margin:1.4em 0 0.5em;color:var(--text)}
  .prose-body blockquote{
    margin:1.4em 0;padding:16px 18px;border-left:3px solid var(--accent);
    border-radius:0 14px 14px 0;background:rgba(255,255,255,0.055);color:var(--muted);
  }
  .prose-body blockquote p:last-child{margin-bottom:0}
  .prose-body ul{list-style:none;margin:0 0 1em;padding:0}
  .prose-body ul li{position:relative;padding-left:1.15em;margin-bottom:0.55em}
  .prose-body ul li::before{
    content:"";position:absolute;left:0;top:0.72em;width:6px;height:6px;border-radius:50%;
    background:var(--accent);box-shadow:0 0 8px rgba(53,229,195,0.8);
  }
  .prose-body ol{margin:0 0 1em;padding-left:1.3em}
  .prose-body ol li{margin-bottom:0.55em}
  .prose-body ol li::marker{color:var(--accent);font-weight:700}
  .prose-body a{color:var(--accent);text-decoration:underline;text-underline-offset:3px;transition:opacity 200ms var(--ease)}
  .prose-body a:hover{opacity:.8}
  .prose-body strong{color:#FFFFFF;font-weight:600}
  .prose-body img{border-radius:16px;margin:1.3em 0 0.6em;width:100%;height:auto;object-fit:cover}
  .prose-body figcaption{font-size:13px;color:var(--dim);text-align:center;margin-top:-0.2em}
  .prose-body table{width:100%;border-collapse:collapse;margin:1.2em 0;font-size:14.5px}
  .prose-body th,.prose-body td{border:1px solid var(--line);padding:10px 12px;text-align:left}
  .prose-body th{background:rgba(255,255,255,0.05);color:var(--text);font-weight:600}
  .prose-body hr{border:0;height:1px;background:var(--line);margin:2em 0}
  .prose-body code{background:rgba(255,255,255,0.08);border-radius:6px;padding:2px 6px;font-size:14px}

  .empty-state{
    padding:34px 24px;border-radius:var(--radius-lg);border:1px dashed var(--line);
    background:var(--panel);text-align:center;
  }
  .empty-title{font-size:19px;font-weight:700;margin:0 0 10px;color:var(--text)}
  .empty-state p{color:var(--muted);margin:0 0 18px}

  /* 安全提醒卡 */
  .safe-card{
    margin-top:38px;padding:24px;border-radius:var(--radius-lg);
    border:1px solid rgba(255,138,101,0.32);
    background:linear-gradient(180deg,rgba(255,138,101,0.11),rgba(255,138,101,0.03));
  }
  .safe-kicker{font-size:12px;font-weight:700;letter-spacing:.10em;color:var(--warn);margin:0 0 8px}
  .safe-title{font-size:19px;line-height:1.5;font-weight:700;margin:0 0 16px;color:var(--text)}
  .safe-list{list-style:none;margin:0;padding:0;display:grid;gap:11px}
  .safe-list li{position:relative;padding-left:20px;font-size:14.5px;line-height:1.7;color:var(--muted)}
  .safe-list li::before{
    content:"";position:absolute;left:0;top:.6em;width:7px;height:7px;border-radius:50%;
    background:var(--warn);box-shadow:0 0 10px rgba(255,138,101,0.85);
  }

  /* 右侧栏 */
  .read-side{display:grid;gap:14px;align-content:start;min-width:0}
  @media (min-width:1024px){.read-side{position:sticky;top:96px}}
  .side-card{
    padding:18px;border-radius:var(--radius-sm);border:1px solid var(--line);
    background:var(--panel);backdrop-filter:blur(14px) saturate(140%);
    box-shadow:0 20px 60px -30px rgba(4,12,32,0.9);
  }
  .side-title{font-size:13px;font-weight:700;letter-spacing:.06em;color:var(--accent);margin:0 0 12px}
  .side-note p{margin:0;font-size:13.5px;line-height:1.8;color:var(--muted)}
  .toc-list{list-style:none;margin:0;padding:0;display:grid;gap:2px;max-height:58vh;overflow:auto}
  .toc-list a{
    display:block;font-size:13.5px;line-height:1.6;color:var(--muted);
    padding:6px 0 6px 11px;border-left:2px solid transparent;
    transition:color 200ms var(--ease),border-color 200ms var(--ease);
  }
  .toc-list a:hover,.toc-list a.is-current{color:var(--accent);border-left-color:var(--accent)}
  .side-back{
    display:inline-flex;align-items:center;justify-content:center;min-height:44px;
    padding:10px 16px;border-radius:12px;font-size:14px;color:var(--muted);
    border:1px solid var(--line);background:rgba(255,255,255,0.04);
    transition:color 200ms var(--ease),border-color 200ms var(--ease),background 200ms var(--ease);
  }
  .side-back:hover{color:var(--accent);border-color:var(--line-hi);background:rgba(53,229,195,0.09)}

  /* 相关推荐 */
  .rel-block{margin-top:52px}
  .block-h2{font-size:clamp(19px,2.2vw,24px);font-weight:700;letter-spacing:-0.01em;margin:0 0 18px}
  .rel-grid{display:grid;grid-template-columns:1fr;gap:14px}
  @media (min-width:640px){.rel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media (min-width:1024px){.rel-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}}
  .rel-card{
    display:flex;flex-direction:column;gap:8px;padding:18px;min-height:100%;
    border-radius:var(--radius-sm);border:1px solid var(--line);
    background:var(--panel);backdrop-filter:blur(14px) saturate(140%);
    box-shadow:0 20px 60px -30px rgba(4,12,32,0.9);
    transition:border-color 200ms var(--ease),transform 200ms var(--ease),box-shadow 200ms var(--ease);
  }
  .rel-card:hover{border-color:var(--line-hi);transform:translateY(-2px);box-shadow:0 24px 60px -26px rgba(4,12,32,0.95)}
  .rel-title{font-size:15.5px;font-weight:600;line-height:1.55;color:var(--text)}
  .rel-desc{
    font-size:13.5px;line-height:1.75;color:var(--muted);
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }

  /* 下载引导条 */
  .dl-strip{
    margin-top:44px;padding:22px 24px;border-radius:var(--radius-lg);
    border:1px solid var(--line);background:var(--panel);
    backdrop-filter:blur(14px) saturate(140%);
    display:flex;flex-wrap:wrap;gap:18px;align-items:center;justify-content:space-between;
  }
  .dl-strip h2{font-size:18px;font-weight:700;margin:0 0 6px}
  .dl-strip p{margin:0;font-size:13.5px;color:var(--muted);line-height:1.7;max-width:46ch}
  .dl-links{display:flex;flex-wrap:wrap;gap:10px}
  .dl-links .btn{min-height:44px;padding:10px 16px;font-size:14px}

  /* 收束 */
  .post-end{
    margin-top:40px;padding:26px 24px;border-radius:var(--radius-lg);
    border:1px solid var(--line);background:var(--bg-2);
    display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;
  }
  .post-end-line{margin:0;font-size:15.5px;color:var(--text);font-weight:600;line-height:1.7}
  .post-end-links{display:flex;flex-wrap:wrap;gap:10px}
  .post-end-links .btn{min-height:44px;padding:10px 18px;font-size:14px}

  /* 页脚 */
  .site-foot{margin-top:64px;background:#050912;border-top:1px solid var(--line);padding:52px 0 26px}
  .foot-grid{display:grid;grid-template-columns:1fr;gap:32px}
  @media (min-width:768px){.foot-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px}}
  .foot-brand .brand{margin-bottom:14px}
  .foot-brand p{margin:0;font-size:13.5px;line-height:1.85;color:var(--muted);max-width:34ch}
  .foot-col h4{font-size:13px;font-weight:700;letter-spacing:.06em;color:var(--text);margin:0 0 12px}
  .foot-col ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
  .foot-col a{font-size:13.5px;color:var(--muted);transition:color 200ms var(--ease)}
  .foot-col a:hover{color:var(--accent)}
  .foot-bottom{
    margin-top:36px;padding-top:18px;border-top:1px solid var(--line);
    display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
    font-size:12.5px;color:var(--dim);
  }
  .to-top{color:var(--muted);transition:color 200ms var(--ease)}
  .to-top:hover{color:var(--accent)}

/* roulang page: category1 */
:root{
    --bg:#070C1A; --bg-2:#0D1730; --panel:rgba(255,255,255,0.055);
    --line:rgba(255,255,255,0.10); --line-hi:rgba(53,229,195,0.45);
    --text:#ECF2FF; --muted:#9AA9C6; --dim:#6B7A99;
    --accent:#35E5C3; --accent-2:#2AB3FF; --warn:#FF8A65;
    --radius-lg:20px; --radius-sm:14px;
    --shadow:0 20px 60px -24px rgba(4,12,32,0.9);
    --ease:cubic-bezier(.2,.7,.3,1);
  }
  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0; background:var(--bg); color:var(--text);
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
    font-size:16px; line-height:1.75; -webkit-font-smoothing:antialiased;
    background-image:
      radial-gradient(900px 520px at 8% 0%, rgba(18,34,80,0.65) 0%, rgba(7,12,26,0) 62%),
      radial-gradient(760px 460px at 96% 22%, rgba(11,58,58,0.55) 0%, rgba(7,12,26,0) 60%);
    background-repeat:no-repeat;
  }
  a{color:inherit;text-decoration:none}
  img{max-width:100%;display:block}
  button,input,select,textarea{font:inherit;color:inherit}
  :focus-visible{outline:2px solid var(--accent);outline-offset:2px}
  .wrap{max-width:1200px;margin:0 auto;padding:0 20px}
  @media (min-width:768px){ .wrap{padding:0 32px} }
  .skip{position:absolute;left:-9999px;top:0;background:var(--accent);color:#04202A;padding:10px 16px;border-radius:0 0 12px 0;z-index:99}
  .skip:focus{left:0}

  /* ===== 导航 ===== */
  .site-head{position:sticky;top:0;z-index:70;padding:16px 16px 0}
  .nav-shell{
    max-width:1200px;margin:0 auto;display:flex;align-items:center;gap:14px;
    padding:10px 14px;border-radius:18px;border:1px solid var(--line);
    background:rgba(9,15,32,0.72);backdrop-filter:blur(16px) saturate(150%);
    box-shadow:0 18px 44px -26px rgba(4,12,32,0.95);
    transition:background 200ms var(--ease),box-shadow 200ms var(--ease);
  }
  .site-head.is-stuck .nav-shell{background:rgba(6,10,24,0.94);box-shadow:0 22px 52px -22px rgba(0,0,0,0.9)}
  .brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;min-height:44px}
  .brand-mark{
    width:34px;height:34px;border-radius:11px;flex:0 0 auto;display:grid;place-items:center;
    background:linear-gradient(135deg,var(--accent),var(--accent-2));
    box-shadow:0 0 0 1px rgba(255,255,255,0.22),0 10px 24px -10px rgba(53,229,195,0.6);
    color:#04202A;font-weight:800;font-size:15px;
  }
  .brand-text{display:flex;flex-direction:column;line-height:1.2}
  .brand-name{font-weight:700;font-size:15px;letter-spacing:-0.01em;white-space:nowrap}
  .brand-sub{font-size:11px;color:var(--dim);letter-spacing:0.04em}
  .nav-links{display:none;align-items:center;gap:2px;margin-left:auto}
  .nav-links a{
    position:relative;display:inline-flex;align-items:center;min-height:44px;padding:10px 12px;
    border-radius:10px;font-size:14px;color:var(--muted);
    transition:color 200ms var(--ease),background 200ms var(--ease);
  }
  .nav-links a:hover{color:var(--text);background:rgba(255,255,255,0.06)}
  .nav-links a.active{color:var(--accent)}
  .nav-links a.active::after{
    content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;border-radius:2px;
    background:var(--accent);box-shadow:0 0 10px rgba(53,229,195,0.7);
  }
  .nav-cta{
    display:none;align-items:center;justify-content:center;min-height:44px;padding:11px 18px;
    border-radius:12px;font-size:14px;font-weight:600;color:#04202A;
    background:linear-gradient(135deg,#35E5C3,#2AB3FF);
    box-shadow:inset 0 0 0 1px rgba(255,255,255,0.25),0 10px 30px -8px rgba(53,229,195,0.5);
    transition:filter 200ms var(--ease),box-shadow 200ms var(--ease),transform 200ms var(--ease);
  }
  .nav-cta:hover{filter:brightness(1.04);box-shadow:inset 0 0 0 1px rgba(255,255,255,0.3),0 14px 38px -8px rgba(53,229,195,0.68)}
  .nav-cta:active{transform:translateY(0);box-shadow:0 6px 18px -8px rgba(53,229,195,0.45)}
  .menu-btn{
    display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
    width:44px;height:44px;margin-left:auto;border-radius:12px;cursor:pointer;
    border:1px solid var(--line);background:rgba(255,255,255,0.05);
    transition:border-color 200ms var(--ease),background 200ms var(--ease);
  }
  .menu-btn:hover{border-color:var(--line-hi);background:rgba(53,229,195,0.09)}
  .menu-btn span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text)}
  @media (min-width:960px){
    .nav-links{display:flex}
    .menu-btn{display:none}
  }
  @media (min-width:1100px){ .nav-cta{display:inline-flex;margin-left:8px} }
  .drawer{
    position:fixed;inset:0;z-index:80;display:none;
    background:rgba(4,8,18,0.86);backdrop-filter:blur(14px);
    padding:88px 20px 32px;
  }
  .drawer.open{display:block}
  .drawer-inner{max-width:520px;margin:0 auto;border:1px solid var(--line);border-radius:20px;background:rgba(10,16,34,0.9);padding:16px}
  .drawer a{
    display:flex;align-items:center;justify-content:flex-end;height:48px;padding:0 12px;
    font-size:15px;color:var(--text);border-bottom:1px solid rgba(255,255,255,0.08);
  }
  .drawer a:hover{color:var(--accent)}
  .drawer a:last-of-type{border-bottom:0}
  .drawer .drawer-cta{
    justify-content:center;margin-top:12px;border-radius:12px;font-weight:600;color:#04202A;
    background:linear-gradient(135deg,#35E5C3,#2AB3FF);border-bottom:0;
  }
  body.locked{overflow:hidden}

  /* ===== 通用组件 ===== */
  .lead{color:var(--muted);font-size:15px;line-height:1.85;margin:0 0 12px}
  .tag{
    display:inline-block;padding:4px 10px;border-radius:999px;font-size:12px;font-weight:600;
    background:rgba(53,229,195,0.12);color:var(--accent);border:1px solid rgba(53,229,195,0.28);
  }
  .tag-warn{background:rgba(255,138,101,0.13);color:var(--warn);border-color:rgba(255,138,101,0.32)}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;
    padding:12px 22px;border-radius:12px;font-size:15px;font-weight:600;cursor:pointer;
    border:1px solid transparent;
    transition:filter 200ms var(--ease),box-shadow 200ms var(--ease),transform 200ms var(--ease),border-color 200ms var(--ease),background 200ms var(--ease);
  }
  .btn-main{
    color:#04202A;background:linear-gradient(135deg,#35E5C3,#2AB3FF);
    box-shadow:inset 0 0 0 1px rgba(255,255,255,0.25),0 10px 30px -8px rgba(53,229,195,0.5);
  }
  .btn-main:hover{filter:brightness(1.04);box-shadow:inset 0 0 0 1px rgba(255,255,255,0.3),0 16px 40px -10px rgba(53,229,195,0.7)}
  .btn-main:active{transform:translateY(1px)}
  .btn-ghost{color:var(--text);background:rgba(255,255,255,0.05);border-color:var(--line)}
  .btn-ghost:hover{border-color:var(--accent);background:rgba(53,229,195,0.09)}
  .btn-ghost:active{transform:translateY(1px)}
  .sec{padding:56px 0}
  @media (min-width:768px){ .sec{padding:80px 0} }
  .sec-alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .sec-title{font-size:clamp(21px,2.4vw,30px);font-weight:700;letter-spacing:-0.02em;line-height:1.3;margin:0 0 10px}
  .sec-sub{color:var(--muted);font-size:14.5px;margin:0 0 28px;max-width:760px}

  /* ===== 分类标题区 ===== */
  .page-hero{padding:32px 0 8px}
  @media (min-width:1024px){ .page-hero{padding:48px 0 12px} }
  .hero-bar{
    display:grid;gap:20px;padding:24px;border:1px solid var(--line);border-radius:var(--radius-lg);
    background:var(--panel);backdrop-filter:blur(14px) saturate(140%);box-shadow:var(--shadow);
  }
  @media (min-width:960px){
    .hero-bar{grid-template-columns:1.65fr 0.95fr;align-items:start;padding:32px;gap:28px}
  }
  .crumb{font-size:13px;color:var(--dim)}
  .crumb a{color:var(--dim);transition:color 200ms var(--ease)}
  .crumb a:hover{color:var(--accent)}
  .page-title{
    font-size:clamp(27px,4vw,42px);line-height:1.2;letter-spacing:-0.02em;
    margin:12px 0 14px;font-weight:700;
  }
  .hero-points{
    border:1px solid var(--line);border-radius:var(--radius-sm);
    background:rgba(255,255,255,0.04);padding:18px 18px 8px;
  }
  .hero-points h2{font-size:14px;letter-spacing:0.06em;color:var(--dim);margin:0 0 14px;font-weight:600}
  .hero-points ul{list-style:none;margin:0;padding:0;display:grid;gap:12px}
  .hero-points li{display:flex;gap:10px;font-size:14px;color:var(--text);line-height:1.65}
  .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);flex:0 0 auto;margin-top:9px;box-shadow:0 0 10px rgba(53,229,195,0.8)}

  /* ===== 四步流程 ===== */
  .steps{display:grid;gap:16px}
  @media (min-width:768px){ .steps{grid-template-columns:repeat(4,minmax(0,1fr));gap:20px} }
  .step{
    position:relative;padding:20px 18px 18px;border:1px solid var(--line);border-radius:var(--radius-sm);
    background:var(--panel);backdrop-filter:blur(14px) saturate(140%);
    border-left:2px solid rgba(53,229,195,0.55);
    transition:border-color 200ms var(--ease),transform 200ms var(--ease),box-shadow 200ms var(--ease);
  }
  .step:hover{border-color:var(--line-hi);transform:translateY(-2px);box-shadow:0 18px 40px -28px rgba(53,229,195,0.6)}
  .step-no{
    width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
    font-weight:800;font-size:14px;font-variant-numeric:tabular-nums;color:#04202A;
    background:linear-gradient(135deg,var(--accent),var(--accent-2));
    box-shadow:0 10px 24px -12px rgba(53,229,195,0.75);
    margin-bottom:12px;
  }
  .step h3{font-size:16px;margin:0 0 8px;line-height:1.45}
  .step p{margin:0;color:var(--muted);font-size:13.5px;line-height:1.7}

  /* ===== 内容列表 ===== */
  .post-grid{display:grid;gap:18px}
  @media (min-width:768px){ .post-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px} }
  @media (min-width:1024px){ .post-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:22px} }
  .post-card{
    display:flex;flex-direction:column;gap:10px;padding:20px;border:1px solid var(--line);
    border-radius:var(--radius-sm);background:var(--panel);backdrop-filter:blur(14px) saturate(140%);
    transition:border-color 200ms var(--ease),transform 200ms var(--ease),box-shadow 200ms var(--ease);
  }
  .post-card:hover{border-color:var(--line-hi);transform:translateY(-2px);box-shadow:0 20px 46px -30px rgba(53,229,195,0.75)}
  .post-card h3{
    font-size:17px;line-height:1.5;margin:0;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .post-card p{
    margin:0;color:var(--muted);font-size:14px;line-height:1.7;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .post-meta{
    margin-top:auto;display:flex;justify-content:space-between;gap:10px;
    font-size:12.5px;color:var(--dim);padding-top:6px;border-top:1px solid rgba(255,255,255,0.07);
  }
  .empty-note{
    border:1px dashed var(--line);border-radius:var(--radius-sm);padding:28px;
    text-align:center;color:var(--dim);font-size:14px;background:rgba(255,255,255,0.03);
  }

  /* ===== 场景卡 ===== */
  .scene-grid{display:grid;gap:18px}
  @media (min-width:640px){ .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr))} }
  @media (min-width:1024px){ .scene-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:22px} }
  .scene{
    border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden;
    background:var(--panel);backdrop-filter:blur(14px) saturate(140%);
    transition:border-color 200ms var(--ease),transform 200ms var(--ease);
  }
  .scene:hover{border-color:var(--line-hi);transform:translateY(-2px)}
  .scene img{width:100%;height:150px;object-fit:cover;opacity:0.86}
  .scene-body{padding:14px 16px 18px}
  .scene-body h3{font-size:16px;margin:0 0 6px}
  .scene-body p{margin:0;font-size:13.5px;color:var(--muted);line-height:1.7}

  /* ===== 推荐阅读 ===== */
  .rec-list{display:grid;gap:12px;max-width:900px}
  .rec-item{
    display:flex;align-items:center;gap:14px;padding:14px 16px;border:1px solid var(--line);
    border-radius:12px;background:rgba(255,255,255,0.035);
    transition:border-color 200ms var(--ease),background 200ms var(--ease),transform 200ms var(--ease);
  }
  .rec-item:hover{border-color:var(--line-hi);background:rgba(53,229,195,0.07);transform:translateX(2px)}
  .rec-no{font-size:13px;color:var(--accent);font-variant-numeric:tabular-nums;font-weight:700}
  .rec-title{font-size:14.5px;line-height:1.6}
  .rec-arrow{margin-left:auto;color:var(--dim);font-size:13px}

  /* ===== 检查清单 ===== */
  .check-list{list-style:none;margin:0;padding:0;display:grid;gap:12px}
  @media (min-width:768px){ .check-list{grid-template-columns:repeat(2,minmax(0,1fr))} }
  .check-list li{
    display:flex;gap:12px;align-items:flex-start;padding:14px 16px;
    border:1px solid var(--line);border-radius:12px;background:var(--panel);
    font-size:14.5px;line-height:1.7;
    transition:border-color 200ms var(--ease),background 200ms var(--ease);
  }
  .check-list li:hover{border-color:var(--line-hi);background:rgba(53,229,195,0.06)}
  .box{
    width:20px;height:20px;flex:0 0 auto;margin-top:3px;border-radius:6px;
    border:1px solid var(--line-hi);display:grid;place-items:center;
    color:var(--accent);font-size:11px;line-height:1;
  }

  /* ===== 安全提醒 ===== */
  .safety-card{
    border:1px solid rgba(255,138,101,0.34);border-radius:var(--radius-lg);
    background:linear-gradient(180deg,rgba(255,138,101,0.11),rgba(255,138,101,0.03));
    padding:26px;box-shadow:0 24px 60px -34px rgba(255,138,101,0.55);
  }
  .safety-card h2{font-size:clamp(20px,2.3vw,26px);margin:0 0 8px;line-height:1.35}
  .safety-card .lead{color:#FFD3C6;margin:0}
  .safety-list{list-style:none;margin:20px 0 0;padding:0;display:grid;gap:12px}
  @media (min-width:768px){ .safety-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px} }
  .safety-list li{
    display:flex;gap:10px;align-items:flex-start;font-size:14.5px;line-height:1.7;color:#FFE3DA;
    border:1px solid rgba(255,138,101,0.24);border-radius:12px;padding:13px 15px;
    background:rgba(255,138,101,0.06);
  }
  .safety-list li .dot{background:var(--warn);box-shadow:0 0 10px rgba(255,138,101,0.75)}

  /* ===== 快速问答 ===== */
  .qa{display:grid;gap:12px;max-width:880px}
  .qa details{
    border:1px solid var(--line);border-radius:12px;background:var(--panel);
    transition:border-color 200ms var(--ease),background 200ms var(--ease);
  }
  .qa details[open]{border-color:var(--line-hi);background:rgba(53,229,195,0.05)}
  .qa summary{
    list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:14px;
    min-height:56px;padding:12px 18px;font-size:15px;font-weight:600;
  }
  .qa summary::-webkit-details-marker{display:none}
  .qa summary::after{
    content:"+";color:var(--accent);font-size:19px;line-height:1;flex:0 0 auto;
    transition:transform 200ms var(--ease);
  }
  .qa details[open] summary::after{content:"−";transform:rotate(180deg)}
  .qa .ans{margin:0;padding:0 18px 16px;color:var(--muted);font-size:14.5px;line-height:1.8}

  /* ===== 下载条 ===== */
  .dl-bar{
    display:grid;gap:18px;padding:24px;border:1px solid var(--line);border-radius:var(--radius-lg);
    background:var(--panel);backdrop-filter:blur(14px) saturate(140%);box-shadow:var(--shadow);
  }
  @media (min-width:960px){ .dl-bar{grid-template-columns:1fr 1.35fr;align-items:center;gap:28px} }
  .dl-bar h2{font-size:clamp(19px,2.1vw,24px);margin:0 0 8px}
  .dl-bar p{margin:0;color:var(--muted);font-size:14px;line-height:1.75}
  .dl-links{display:grid;gap:12px}
  @media (min-width:640px){ .dl-links{grid-template-columns:repeat(3,minmax(0,1fr))} }
  .dl-link{
    display:flex;align-items:center;justify-content:center;min-height:52px;padding:12px 14px;
    border:1px solid var(--line);border-radius:12px;background:rgba(255,255,255,0.05);
    font-size:14.5px;font-weight:600;
    transition:border-color 200ms var(--ease),color 200ms var(--ease),box-shadow 200ms var(--ease),transform 200ms var(--ease);
  }
  .dl-link:hover{
    border-color:var(--accent);color:var(--accent);transform:translateY(-2px);
    box-shadow:0 0 0 1px rgba(53,229,195,0.25),0 16px 34px -22px rgba(53,229,195,0.9);
  }
  .dl-link:active{transform:translateY(0)}

  /* ===== 收束区 ===== */
  .closing{padding:40px 0 64px}
  .closing-inner{
    display:flex;flex-wrap:wrap;gap:18px;justify-content:space-between;align-items:center;
    border-top:1px solid var(--line);padding-top:26px;
  }
  .closing-inner p{margin:0;color:var(--muted);font-size:14.5px;max-width:640px}
  .closing-actions{display:flex;flex-wrap:wrap;gap:12px}

  /* ===== 页脚 ===== */
  .site-foot{background:#050912;border-top:1px solid var(--line);padding:56px 0 24px;color:var(--muted)}
  .foot-grid{display:grid;grid-template-columns:1fr;gap:32px}
  @media (min-width:768px){ .foot-grid{grid-template-columns:1.5fr 1fr 1fr 1fr} }
  .foot-brand .brand{margin-bottom:14px}
  .foot-brand p{margin:0;font-size:13.5px;line-height:1.8;color:var(--dim);max-width:340px}
  .foot-col h4{margin:0 0 14px;font-size:14px;color:var(--text);letter-spacing:0.02em}
  .foot-col ul{list-style:none;margin:0;padding:0;display:grid;gap:10px}
  .foot-col a{font-size:13.5px;color:var(--muted);transition:color 200ms var(--ease)}
  .foot-col a:hover{color:var(--accent)}
  .foot-bottom{
    display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
    margin-top:36px;padding-top:18px;border-top:1px solid var(--line);
    font-size:13px;color:var(--dim);
  }
  .to-top{color:var(--muted);transition:color 200ms var(--ease)}
  .to-top:hover{color:var(--accent)}
  section[id]{scroll-margin-top:96px}