:root{--ink:#0f172a;--grad:linear-gradient(120deg,#1677ff,#0958d9);--blue:#1677ff;--blue-dark:#0958d9;--blue-soft:#e6f0ff;--price:#ff4d4f;--red:#ff4d4f;--line:#ececec;--bg:#f5f6f8;--text:#1f2329;--text-sub:#8a8f99;--nav-h:62px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;color:var(--text);background:var(--bg);line-height:1.6}a{text-decoration:none;color:inherit}header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}.nav{height:var(--nav-h);display:flex;align-items:center;padding:0 32px;gap:28px}.logo{display:flex;align-items:center;gap:9px;font-size:22px;font-weight:800;color:#0f172a;white-space:nowrap;letter-spacing:.5px}.logo .cloud{font-size:26px;color:#1677ff}.nav-menu{display:flex;align-items:center;gap:26px;font-size:15px}.nav-menu a{position:relative;padding:18px 0;color:#475569;display:flex;align-items:center;gap:5px;transition:color .2s}.nav-menu a:hover{color:var(--blue)}.nav-menu a.active{color:var(--blue);font-weight:600}.nav-menu a.open{color:var(--blue);font-weight:600}.nav-menu a.active::after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:linear-gradient(120deg,#1677ff,#0958d9);border-radius:2px 2px 0 0}.hot{background:#f97316;color:#fff;font-size:10px;padding:1px 5px;border-radius:4px;font-weight:700;line-height:1.4}.rec{background:#06b6d4;color:#fff;font-size:10px;padding:1px 5px;border-radius:4px;font-weight:700;line-height:1.4}.nav-right{margin-left:auto;display:flex;align-items:center;gap:16px;font-size:14px;color:#475569}.nav-search{display:flex;align-items:center;border:1px solid var(--line);border-radius:10px;padding:7px 12px;color:#94a3b8;font-size:13px;background:#f8fafc;transition:border-color .2s}
  .nav-search:focus-within{border-color:#1677ff}.nav-search input{border:none;outline:none;background:transparent;font-size:13px;width:120px;color:#0f172a}.nav-right a:hover{color:var(--blue)}.btn-reg{background:var(--blue);color:#fff;padding:8px 18px;border-radius:10px;font-weight:600;box-shadow:0 4px 14px rgba(22,119,255,.3);transition:transform .15s,box-shadow .2s}.btn-reg:hover{transform:translateY(-1px);box-shadow:0 8px 22px rgba(79,70,229,.4);color:#fff}.mega-wrap{position:absolute;top:var(--nav-h);left:0;right:0;z-index:60;display:none}.mega-wrap.open{display:block}.mega-backdrop{position:fixed;inset:var(--nav-h) 0 0 0;background:rgba(0,0,0,.15);z-index:-1}.mega-panel{display:flex;background:#fff;box-shadow:0 10px 30px rgba(0,0,0,.12);border-top:1px solid var(--line);min-height:420px}.mega-left{width:240px;background:#f4f8ff;padding:20px 0;flex-shrink:0}.mega-left h2{font-size:20px;font-weight:700;color:#1f2329;padding:0 20px 16px}.mega-nav li{list-style:none}.mega-nav a{display:flex;align-items:center;justify-content:space-between;padding:10px 20px;font-size:14px;color:#3a3f47;transition:background .15s}.mega-nav a:hover{background:#e6f0ff;color:var(--blue)}.mega-nav a.active{background:var(--blue);color:#fff}.mega-nav a .hot{background:#fff;color:var(--blue);font-size:10px;padding:1px 5px;border-radius:3px;font-weight:700}.mega-nav a.active .hot{background:rgba(255,255,255,.2);color:#fff}.mega-right{flex:1;padding:24px 28px;position:relative}.mega-close{position:absolute;top:16px;right:22px;width:28px;height:28px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:#9aa2ad;border-radius:6px}.mega-close:hover{background:#f2f3f5;color:#5a5f67}.mega-search{display:flex;align-items:center;border:1px solid var(--line);border-radius:8px;padding:8px 12px;width:360px;max-width:100%;margin-bottom:18px}.mega-search input{border:none;outline:none;font-size:14px;flex:1;color:var(--text)}.mega-search .ic{color:var(--text-sub);margin-right:6px}.mega-tags{display:flex;gap:10px;margin-bottom:24px}.mega-tag{background:#f2f3f5;color:#5a5f67;padding:5px 14px;border-radius:6px;font-size:13px;cursor:pointer}.mega-tag:hover,.mega-tag.active{background:var(--blue);color:#fff}.mega-body{display:flex;gap:40px}.mega-col{flex:1;min-width:0}.mega-col-title{font-size:15px;font-weight:700;color:#1f2329;margin-bottom:14px;display:flex;align-items:center;gap:6px}.mega-col-title .more{margin-left:auto;font-size:13px;color:var(--text-sub);font-weight:400;cursor:pointer}.mega-col-title .more:hover{color:var(--blue)}.rec-list{display:flex;flex-direction:column;gap:18px}.rec-item{display:flex;gap:12px;transition:background .15s,transform .15s;cursor:pointer}.rec-num{font-size:24px;font-weight:800;color:var(--blue);line-height:1;width:34px;flex-shrink:0}.rec-text h4{font-size:14px;font-weight:700;color:#1f2329;margin-bottom:4px}.rec-text p{font-size:13px;color:#6b7078;line-height:1.6}.news-list{display:flex;flex-direction:column;gap:12px}.news-item{display:flex;align-items:flex-start;gap:8px;font-size:13px;color:#3a3f47;cursor:pointer}.news-item:hover{color:var(--blue)}.news-item span{color:var(--text-sub);min-width:18px}.mega-simple-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px 30px}.mega-simple-item h4{font-size:14px;font-weight:700;color:#1f2329;margin-bottom:5px}.mega-simple-item p{font-size:13px;color:#6b7078;line-height:1.6}.mega-simple-item h4 .badge{font-size:10px;background:var(--red);color:#fff;padding:1px 5px;border-radius:3px;margin-left:6px;font-weight:700;vertical-align:middle}.mega-simple-grid.col-2{grid-template-columns:repeat(2,1fr)}.mega-tabs{padding:0 20px;display:flex;flex-direction:column;gap:10px;margin-top:6px}.mega-tabs a{font-size:13px;color:#5a5f67;padding:8px 10px;border-radius:6px}.mega-tabs a:hover{background:#e6f0ff;color:var(--blue)}.mega-tabs a.active{color:var(--blue);font-weight:600;background:#fff}.eco-promo{width:240px;flex-shrink:0;background:linear-gradient(135deg,#f0f7ff,#e6f4ff);border-radius:12px;padding:20px;display:flex;flex-direction:column;justify-content:center;gap:10px;margin-left:20px}.eco-promo h4{font-size:16px;font-weight:700;color:#1f2329}.eco-promo p{font-size:13px;color:#5a5f67;line-height:1.6}.eco-promo .promo-img{height:80px;background:radial-gradient(circle at 70% 50%,rgba(22,119,255,.25),transparent 70%),radial-gradient(circle at 30% 40%,rgba(22,119,255,.15),transparent 60%);border-radius:10px}.nav-menu a .arr{font-size:10px;color:var(--text-sub);margin-left:-2px;transition:transform .2s}.nav-menu a.open .arr,.nav-menu a:hover .arr{color:var(--blue)}.nav-menu a.open .arr{transform:rotate(180deg)}.crumb{padding:14px 28px;font-size:13px;color:var(--text-sub);display:flex;align-items:center;gap:8px;flex-wrap:wrap;background:#fff;border-bottom:1px solid var(--line)}.crumb a:hover{color:var(--blue)}.crumb b{color:#3a3f47;font-weight:400}.docs-hero{margin:0 28px 18px;height:220px;border-radius:12px;overflow:hidden;position:relative;display:flex;align-items:center;justify-content:space-between;padding:0 48px;color:#fff;background:linear-gradient(105deg,rgba(15,35,75,.92) 0%,rgba(22,119,255,.78) 60%,rgba(6,182,212,.65) 100%),url('https://images.unsplash.com/photo-1516321318423-f06f85e504b3?auto=format&fit=crop&w=1600&q=80') center/cover;background-blend-mode:multiply}.docs-hero::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 50%,rgba(255,255,255,.08),transparent 45%),radial-gradient(circle at 20% 80%,rgba(255,255,255,.05),transparent 40%);pointer-events:none}.hero-left{position:relative;z-index:1;max-width:460px}.hero-left h1{font-size:34px;font-weight:800;margin-bottom:12px;letter-spacing:1px}.hero-tags{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:13px}.hero-tags .label{opacity:.8}.hero-tags a{background:rgba(255,255,255,.15);padding:4px 10px;border-radius:20px;color:#fff;transition:background .2s}.hero-tags a:hover{background:rgba(255,255,255,.28)}.hero-search{display:flex;align-items:center;position:relative;z-index:1;background:#fff;border-radius:8px;padding:6px 6px 6px 16px;width:380px;max-width:100%;box-shadow:0 6px 20px rgba(0,0,0,.12)}.hero-search input{border:none;outline:none;flex:1;font-size:14px;color:var(--text)}.hero-search .s-btn{background:var(--blue);color:#fff;border:none;padding:9px 22px;border-radius:6px;font-size:14px;font-weight:600;cursor:pointer}.hero-search .s-btn:hover{background:var(--blue-dark)}.docs-main{display:flex;gap:18px;padding:0 28px 60px;align-items:flex-start}.docs-left{flex:1;min-width:0}.docs-right{width:300px;flex-shrink:0;display:flex;flex-direction:column;gap:18px}.doc-tabs{background:#fff;border-radius:8px 8px 0 0;border:1px solid var(--line);border-bottom:none;padding:0 20px;display:flex;gap:28px}.doc-tabs a{position:relative;padding:16px 0;font-size:15px;color:#5a5f67;font-weight:500}.doc-tabs a.active{color:var(--blue);font-weight:700}.doc-tabs a.active::after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:var(--blue);border-radius:2px 2px 0 0}.doc-tabs a:hover{color:var(--blue)}.doc-list{background:#fff;border:1px solid var(--line);border-top:none;border-radius:0 0 8px 8px;padding:10px 24px 24px}.doc-item{padding:22px 0;border-bottom:1px solid var(--line)}.doc-item:last-child{border-bottom:none}.doc-item h3{font-size:17px;font-weight:700;color:#1f2329;margin-bottom:8px;cursor:pointer}.doc-item h3:hover{color:var(--blue)}.doc-item p{font-size:14px;color:var(--text-sub);line-height:1.7;margin-bottom:10px}.doc-meta{display:flex;align-items:center;gap:18px;font-size:13px;color:var(--text-sub)}.doc-meta span{display:flex;align-items:center;gap:5px}.doc-meta .tag{background:#f2f3f5;padding:2px 8px;border-radius:4px;color:#5a5f67}.doc-meta .eye{color:var(--blue)}.side-card{background:#fff;border:1px solid var(--line);border-radius:8px;padding:20px}.side-title{font-size:15px;font-weight:700;color:#1f2329;margin-bottom:16px}.more-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.more-item{display:flex;flex-direction:column;align-items:center;gap:8px;font-size:13px;color:#5a5f67;cursor:pointer}.more-item:hover{color:var(--blue)}.more-icon{width:44px;height:44px;border-radius:10px;background:var(--blue-soft);display:flex;align-items:center;justify-content:center;font-size:20px;color:var(--blue)}.hot-list{display:flex;flex-direction:column;gap:14px}.hot-row{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:#3a3f47;cursor:pointer}.hot-row:hover{color:var(--blue)}.hot-rank{width:20px;height:20px;border-radius:4px;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;background:#f2f3f5;color:#5a5f67;flex-shrink:0}.hot-rank.top{background:var(--red);color:#fff}.hot-row .txt{line-height:1.45}.promo-small{height:80px;border-radius:8px;background:linear-gradient(120deg,var(--blue),#06b6d4);display:flex;align-items:center;padding:0 18px;color:#fff;gap:12px}.promo-small .tag{background:rgba(255,255,255,.2);padding:3px 8px;border-radius:4px;font-size:12px}.promo-small .tit{font-size:15px;font-weight:700}.pagination{display:flex;justify-content:center;gap:8px;margin-top:24px}.pagination a{width:34px;height:34px;display:flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:6px;font-size:13px;color:#5a5f67;background:#fff}.pagination a:hover,.pagination a.active{border-color:var(--blue);color:var(--blue);font-weight:700}.cs{position:fixed;right:0;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:8px;z-index:40}.cs-online{background:#fff;border:1px solid var(--line);border-right:none;border-radius:8px 0 0 8px;padding:10px 12px;display:flex;align-items:center;gap:8px;font-size:13px;color:#3a3f47;box-shadow:-4px 4px 12px rgba(0,0,0,.06);cursor:pointer}.cs-online .av{width:28px;height:28px;border-radius:50%;background:#e6f0ff;display:flex;align-items:center;justify-content:center;font-size:14px}.cs-icon{width:44px;height:44px;border-radius:8px 0 0 8px;background:#fff;border:1px solid var(--line);border-right:none;display:flex;align-items:center;justify-content:center;font-size:18px;color:#5a5f67;cursor:pointer;box-shadow:-4px 4px 12px rgba(0,0,0,.06)}.cs-icon:hover{color:var(--blue)}@media(max-width:1000px){.docs-hero{flex-direction:column;align-items:flex-start;gap:20px;height:auto;padding:28px}.hero-search{width:100%}.docs-main{flex-direction:column}.docs-right{width:100%}}
.rec-item:hover{background:var(--blue-soft);border-radius:10px;transform:translateX(4px)}

/* footer（与首页同款浅色背景） */
footer{padding:46px 32px;background:#fff;color:var(--text);border-top:1px solid var(--line)}
.ft-inner{max-width:1280px;margin:0 auto;display:grid;grid-template-columns:1.6fr repeat(4,1fr);gap:32px}@media(max-width:900px){.ft-inner{grid-template-columns:1fr 1fr}}
.ft-info p{font-size:12px;color:#64748b;line-height:2}
.ft-info .qr{display:flex;gap:12px;margin-top:14px}
.ft-info .qr div{width:70px;height:70px;background:#f1f5f9;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:11px;color:#64748b;text-align:center}
.ft-col h4{font-size:14px;font-weight:800;margin-bottom:14px;color:var(--text)}
.ft-col a{display:block;font-size:13px;color:#64748b;padding:5px 0;transition:.15s}
.ft-col a:hover{color:var(--blue)}
.ft-bottom{max-width:1280px;margin:30px auto 0;padding-top:22px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;align-items:center;gap:20px;font-size:12px;color:#64748b}
.ft-bottom .tag{background:#f1f5f9;padding:4px 11px;border-radius:6px;color:#475569}