:root{
  --bg:#f7f8fa; --card:#fff; --text:#1a1a1a; --sub:#666; --hint:#999;
  --border:#e8eaed; --primary:#4a6cf7; --primary-deep:#3550d6;
  --hot:#ff5a3c; --tag-bg:#f0f2ff; --tag-text:#4a6cf7;
  --green-bg:#f0faf4; --green:#1a9e5c; --green-bd:#d4efdf;
  --orange-bg:#fff8f0; --orange:#d97a1f; --orange-bd:#f5e3cc;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
a{text-decoration:none;color:inherit}

.topbar{background:var(--card);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}
.topbar-inner{max-width:920px;margin:0 auto;padding:14px 20px;display:flex;align-items:center;gap:16px}
.brand{margin-left:auto;font-size:15px;font-weight:600;color:var(--primary);cursor:pointer}

main{max-width:920px;margin:0 auto;padding:20px 20px 60px}
.crumbs{font-size:13px;color:var(--hint);margin-bottom:14px}
.crumbs a{color:var(--hint);cursor:pointer}
.crumbs a:hover{color:var(--primary)}
.crumbs .cur{color:var(--text)}

.hero{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:26px 28px}
.hero-top{display:flex;gap:20px;align-items:flex-start}
.hero-icon{width:76px;height:76px;border-radius:18px;background:linear-gradient(135deg,#f2f5ff,#e9edff);display:flex;align-items:center;justify-content:center;flex-shrink:0;overflow:hidden;border:1px solid #e4e9ff}
.hero-icon.dark{background:#23262d;border-color:#23262d}
.hero-icon img{width:52px;height:52px;object-fit:contain}
.ficon{font-size:34px;font-weight:600;color:var(--primary)}
.hero-body{flex:1;min-width:0}
.hero-title{font-size:26px;font-weight:700;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.hot-badge{background:var(--hot);color:#fff;font-size:12px;padding:2px 10px;border-radius:10px;font-weight:500}
.hero-host{font-size:13px;color:var(--hint);margin-top:6px;word-break:break-all}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.tag{background:var(--tag-bg);color:var(--tag-text);font-size:13px;padding:4px 12px;border-radius:6px}
.btn{padding:12px 30px;border-radius:10px;font-size:15px;font-weight:500;cursor:pointer;transition:all .2s;border:none;display:inline-flex;align-items:center;gap:6px}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 4px 14px rgba(74,108,247,.3)}
.btn-primary:hover{background:var(--primary-deep);transform:translateY(-1px)}
.btn-ghost{background:var(--bg);color:var(--sub);border:1px solid var(--border)}
.btn-ghost:hover{color:var(--primary);border-color:var(--primary)}
.hero-actions{display:flex;gap:12px;margin-top:18px;flex-wrap:wrap}

.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:24px 28px;margin-top:18px}
.card h2{font-size:17px;font-weight:600;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.card h2 .bar{width:4px;height:16px;border-radius:2px;background:var(--primary)}
.intro{font-size:15px;color:#444;line-height:1.9}

.feat-list{display:flex;flex-direction:column;gap:12px;counter-reset:fn}
.feat-item{display:flex;gap:14px;align-items:flex-start;background:var(--bg);border-radius:10px;padding:14px 16px}
.feat-num{width:26px;height:26px;border-radius:8px;background:var(--primary);color:#fff;font-size:13px;font-weight:600;display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:2px}
.feat-t{font-size:14.5px;font-weight:600}
.feat-d{font-size:13.5px;color:var(--sub);margin-top:3px;line-height:1.7}

.duo{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.duo .card{margin-top:18px}
.pros-list,.cons-list{list-style:none;display:flex;flex-direction:column;gap:9px}
.pros-list li,.cons-list li{font-size:13.5px;line-height:1.65;padding:9px 12px 9px 30px;position:relative;border-radius:8px}
.pros-list li{background:var(--green-bg);color:#2c6e4c}
.cons-list li{background:var(--orange-bg);color:#8a5a20}
.pros-list li:before,.cons-list li:before{position:absolute;left:10px;top:9px;font-size:13px;font-weight:700}
.pros-list li:before{content:"✓";color:var(--green)}
.cons-list li:before{content:"!";color:var(--orange)}

.scene-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:10px}
.scene-item{background:var(--bg);border-radius:10px;padding:12px 14px;font-size:13.5px;line-height:1.7;color:#444}
.scene-item b{color:var(--text);font-size:14px}

.price-box{display:flex;align-items:flex-start;gap:12px;background:linear-gradient(135deg,#f6f8ff,#eef1ff);border:1px solid #dfe5ff;border-radius:10px;padding:14px 16px;font-size:14px;color:#3d4a80;line-height:1.7}

.faq-item{border-bottom:1px solid var(--border)}
.faq-item:last-child{border-bottom:none}
.faq-item summary{cursor:pointer;padding:13px 4px;font-size:14.5px;font-weight:500;list-style:none;display:flex;align-items:center;gap:10px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .qm{width:22px;height:22px;border-radius:50%;background:var(--tag-bg);color:var(--tag-text);font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.faq-item summary .arr{margin-left:auto;color:var(--hint);font-size:12px;transition:transform .2s}
.faq-item[open] summary .arr{transform:rotate(180deg)}
.faq-a{padding:0 4px 14px 32px;font-size:13.5px;color:var(--sub);line-height:1.75}

.rel-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px}
.rel-item{background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:12px 14px;display:flex;gap:10px;align-items:center;cursor:pointer;transition:all .2s}
.rel-item:hover{border-color:#c9d4ff;background:var(--card);box-shadow:0 4px 14px rgba(0,0,0,.06)}
.rel-icon{width:34px;height:34px;border-radius:9px;background:var(--card);display:flex;align-items:center;justify-content:center;flex-shrink:0;overflow:hidden;border:1px solid #eef0f5}
.rel-icon img{width:22px;height:22px;object-fit:contain}
.rel-icon .ficon{font-size:15px}
.rel-name{font-size:14px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.rel-desc{font-size:12px;color:var(--hint);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.empty{text-align:center;padding:80px 20px;color:var(--hint)}
.empty a{color:var(--primary)}
footer{max-width:920px;margin:0 auto;padding:20px;text-align:center;color:var(--hint);font-size:13px}

@media(max-width:640px){
  .hero-top{flex-direction:column;gap:14px}
  .hero{padding:20px}
  .hero-title{font-size:21px}
  .duo{grid-template-columns:1fr}
  .card{padding:20px}
  .rel-grid{grid-template-columns:1fr}
  .scene-list{grid-template-columns:1fr}
}

/* ===== 右侧悬浮按钮 ===== */
.dock{position:fixed;right:18px;bottom:88px;display:flex;flex-direction:column;gap:10px;z-index:900}
.dock-btn{width:44px;height:44px;border-radius:50%;background:var(--card);border:1px solid var(--border);color:var(--sub);display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 3px 12px rgba(0,0,0,.07);transition:all .2s;padding:0}
.dock-btn:hover{color:var(--primary);border-color:var(--primary);transform:translateY(-2px);box-shadow:0 6px 18px rgba(74,108,247,.18)}
.dock-btn svg{width:20px;height:20px}
.dock-btn.top{opacity:0;pointer-events:none;transform:translateY(8px)}
.dock-btn.top.show{opacity:1;pointer-events:auto;transform:none}

/* ===== 夜间模式 ===== */
html[data-theme="dark"]{
  --bg:#0e1014; --card:#171a20; --text:#e7e9ee; --sub:#a2a8b4; --hint:#717885;
  --border:#262b35; --primary:#6c8bff; --primary-deep:#4a6cf7;
  --hot:#ff6b4a; --tag-bg:#1e2532; --tag-text:#93a8ff;
  --green-bg:#12251c; --green:#3ccf85; --green-bd:#1f3d2e;
  --orange-bg:#241a12; --orange:#e8a355; --orange-bd:#3d2c1c;
}
html[data-theme="dark"] .hero-icon{background:linear-gradient(135deg,#1f2531,#242a38);border-color:#2a3346}
html[data-theme="dark"] .hero-icon.dark{background:#0c0e12;border-color:#0c0e12}
html[data-theme="dark"] .rel-item:hover{border-color:#39456b}
html[data-theme="dark"] .rel-icon{border-color:#2a303c}
html[data-theme="dark"] .dock-btn{box-shadow:0 3px 14px rgba(0,0,0,.5)}
html[data-theme="dark"] .pros-list li{color:#7fdcae}
html[data-theme="dark"] .cons-list li{color:#e9b77d}
html[data-theme="dark"] .rel-icon{border-color:#2a303c}
html[data-theme="dark"] .btn-primary{box-shadow:0 4px 14px rgba(74,108,247,.25)}
html[data-theme="dark"] .price-box{background:#141b16;border-color:#22402f;color:#a8b6d8}
@media(max-width:640px){
  .dock{right:10px;bottom:74px;gap:8px}
  .dock-btn{width:40px;height:40px}
}