/* ============================================================
   AI众创圈 · 锁定主题（深空蓝 + 蓝紫洋红四色流渐变）
   来源：showcase.html 定稿版，扩展轮播/详情/折叠说明/客服/后台
   ============================================================ */
:root{
  --blue:#00d4ff; --blue2:#2b6fff; --purple:#8b5cf6; --magenta:#ff2d9b;
  --violet:#7c3aed; --violet2:#a855f7;
  --ink:#eaf2ff; --muted:#9fb0d0; --dim:#66789e;
  --flow:linear-gradient(135deg,#00f0ff,#2b6fff,#8b5cf6,#ff2d9b);
  --flow-soft:linear-gradient(135deg,rgba(0,240,255,.16),rgba(43,111,255,.16),rgba(139,92,246,.16),rgba(255,45,155,.16));
  --card:rgba(255,255,255,.045); --line:rgba(140,170,255,.13);
  --glass:rgba(255,255,255,.05);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink); background:#060a1c; overflow-x:hidden; line-height:1.65;
}
body::before{
  content:""; position:fixed; inset:0; z-index:-2;
  background:
    radial-gradient(1200px 800px at 15% -10%, rgba(43,111,255,.22), transparent 60%),
    radial-gradient(1000px 700px at 90% 0%, rgba(255,45,155,.16), transparent 55%),
    radial-gradient(900px 900px at 50% 120%, rgba(139,92,246,.20), transparent 60%),
    #060a1c;
}
body::after{
  content:""; position:fixed; inset:0; z-index:-1; opacity:.5;
  background-image:
    linear-gradient(rgba(120,160,255,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,160,255,.06) 1px, transparent 1px);
  background-size:46px 46px;
  -webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 80%);
          mask-image:radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 80%);
}
.orb{position:fixed;border-radius:50%;filter:blur(90px);opacity:.45;z-index:-1;pointer-events:none}
.orb.a{width:480px;height:480px;background:#2b6fff;top:-120px;left:-100px;animation:float1 16s ease-in-out infinite}
.orb.b{width:420px;height:420px;background:#ff2d9b;top:30%;right:-120px;animation:float2 19s ease-in-out infinite}
.orb.c{width:380px;height:380px;background:#8b5cf6;bottom:-100px;left:30%;animation:float3 22s ease-in-out infinite}
@keyframes float1{50%{transform:translate(120px,80px) scale(1.1)}}
@keyframes float2{50%{transform:translate(-100px,60px) scale(1.15)}}
@keyframes float3{50%{transform:translate(80px,-60px) scale(1.05)}}

.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.grad-text{background:var(--flow);-webkit-background-clip:text;background-clip:text;color:transparent}
a{color:inherit}

/* ---------- 导航 ---------- */
nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(16px);
  background:rgba(8,12,30,.6);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-weight:800;font-size:19px;letter-spacing:.5px;display:flex;align-items:center;gap:9px;text-decoration:none;color:#fff}
.logo .mark{width:30px;height:30px;border-radius:8px;background:var(--flow);display:grid;place-items:center;
  font-size:13px;color:#060a1c;font-weight:900;box-shadow:0 0 22px rgba(43,111,255,.6)}
.nav-links{display:flex;gap:28px;font-size:14px}
.nav-links a{color:var(--muted);text-decoration:none;transition:.2s}
.nav-links a:hover{color:#fff}
.btn{border:none;cursor:pointer;font-size:14px;font-weight:600;padding:11px 22px;border-radius:11px;transition:.25s;text-decoration:none;display:inline-block;text-align:center}
.btn-primary{background:var(--flow);color:#fff;box-shadow:0 8px 30px rgba(43,111,255,.45)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 38px rgba(255,45,155,.5)}
.btn-ghost{background:var(--glass);color:#fff;border:1px solid rgba(140,170,255,.35)}
.btn-ghost:hover{border-color:var(--blue);box-shadow:0 0 22px rgba(0,212,255,.35)}
.btn-sm{padding:8px 16px;font-size:13px;border-radius:9px}

/* ---------- Hero / 通用区块 ---------- */
.hero{position:relative;padding:88px 0 56px;text-align:center}
.hero .tag{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);
  border:1px solid rgba(140,170,255,.2);padding:6px 16px;border-radius:999px;margin-bottom:24px;background:rgba(255,255,255,.03)}
.hero .tag .dot{width:7px;height:7px;border-radius:50%;background:var(--blue);box-shadow:0 0 12px var(--blue)}
.hero h1{font-size:clamp(32px,6vw,58px);font-weight:800;line-height:1.12;margin-bottom:18px}
.hero p.sub{font-size:clamp(15px,2vw,18px);color:var(--muted);max-width:660px;margin:0 auto 32px}
.hero .cta{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.hero .glow-ring{position:absolute;left:50%;top:46%;transform:translate(-50%,-50%);
  width:680px;height:680px;border-radius:50%;background:var(--flow);filter:blur(120px);opacity:.16;z-index:-1}
.sec{padding:64px 0}
.sec-head{text-align:center;margin-bottom:42px}
.sec-head .eyebrow{font-size:13px;letter-spacing:3px;text-transform:uppercase;color:var(--blue)}
.sec-head h2{font-size:clamp(24px,4vw,38px);font-weight:800;margin:10px 0 12px}
.sec-head p{color:var(--muted);max-width:620px;margin:0 auto}

/* ---------- 轮播图 ---------- */
.carousel{position:relative;border-radius:22px;overflow:hidden;box-shadow:0 24px 60px rgba(43,111,255,.22);margin:0 0 10px}
.carousel .track{display:flex;transition:transform .6s cubic-bezier(.2,.7,.2,1)}
.slide{min-width:100%;position:relative;padding:64px 56px;min-height:300px;display:flex;flex-direction:column;justify-content:center;overflow:hidden}
.slide::after{content:"";position:absolute;inset:0;background:radial-gradient(600px 300px at 80% 20%,rgba(255,255,255,.18),transparent 60%);pointer-events:none}
.slide.s1{background:linear-gradient(120deg,#0b2a6b,#2b6fff 60%,#8b5cf6)}
.slide.s2{background:linear-gradient(120deg,#3a0d5e,#7c3aed 55%,#ff2d9b)}
.slide.s3{background:linear-gradient(120deg,#06283d,#00a8e8 55%,#2b6fff)}
.slide.s4{background:linear-gradient(120deg,#4a0f3c,#db2777 55%,#8b5cf6)}
.slide .kicker{font-size:13px;letter-spacing:2px;text-transform:uppercase;opacity:.85;margin-bottom:12px;font-weight:600}
.slide h2{font-size:clamp(24px,4vw,40px);font-weight:800;margin-bottom:14px;position:relative}
.slide p{font-size:15px;max-width:560px;opacity:.92;margin-bottom:24px;position:relative}
.slide .btn{position:relative;align-self:flex-start}
.carousel .arrow{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:44px;border-radius:50%;
  background:rgba(8,12,30,.5);border:1px solid rgba(255,255,255,.25);color:#fff;font-size:20px;cursor:pointer;
  display:grid;place-items:center;backdrop-filter:blur(6px);transition:.2s;z-index:3}
.carousel .arrow:hover{background:rgba(8,12,30,.8);border-color:var(--blue)}
.carousel .arrow.prev{left:16px}.carousel .arrow.next{right:16px}
.carousel .dots{position:absolute;bottom:16px;left:50%;transform:translateX(-50%);display:flex;gap:9px;z-index:3}
.carousel .dots span{width:9px;height:9px;border-radius:50%;background:rgba(255,255,255,.4);cursor:pointer;transition:.25s}
.carousel .dots span.on{width:26px;border-radius:999px;background:#fff}

/* ---------- 数据条 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:34px 0}
.stat{padding:22px 18px;border-radius:16px;text-align:center;background:var(--card);border:1px solid var(--line);backdrop-filter:blur(10px)}
.stat b{display:block;font-size:30px;font-weight:800}
.stat span{font-size:13px;color:var(--muted)}

/* ---------- 筛选 ---------- */
.filters{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-bottom:34px}
.chip{padding:9px 18px;border-radius:999px;font-size:13px;cursor:pointer;color:var(--muted);
  background:var(--glass);border:1px solid rgba(140,170,255,.15);transition:.2s}
.chip:hover{color:#fff}
.chip.on{color:#fff;background:rgba(43,111,255,.22);border-color:var(--blue);box-shadow:0 0 18px rgba(0,212,255,.3)}

/* ---------- 产品网格 / 卡片 ---------- */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{position:relative;border-radius:18px;padding:24px;overflow:hidden;
  background:var(--card);border:1px solid var(--line);backdrop-filter:blur(12px);transition:.3s;display:flex;flex-direction:column}
.card::before{content:"";position:absolute;inset:0;border-radius:18px;padding:1px;background:var(--flow);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:.3s}
.card:hover{transform:translateY(-6px)}
.card:hover::before{opacity:1}
.card:hover{box-shadow:0 20px 50px rgba(43,111,255,.25)}
.card .ico{width:48px;height:48px;border-radius:13px;background:var(--flow);display:grid;place-items:center;font-size:20px;margin-bottom:16px;box-shadow:0 0 24px rgba(139,92,246,.5)}
.card h3{font-size:18px;font-weight:700;margin-bottom:6px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.card .hot{font-size:11px;font-weight:700;color:#060a1c;background:linear-gradient(90deg,#ffd36e,#ff7ac6);padding:2px 9px;border-radius:999px}
.card .cat{font-size:12px;color:var(--blue);margin-bottom:10px}
.card .desc{font-size:13.5px;color:var(--muted);flex:1;margin-bottom:16px}
.card .price{font-size:14px;color:#fff;font-weight:600;margin-bottom:16px}
.card .acts{display:flex;gap:10px}
.card .acts a{flex:1;text-align:center;padding:10px 0;border-radius:10px;font-size:13px;font-weight:600;text-decoration:none;transition:.2s}
.acts .d{background:rgba(0,212,255,.14);color:var(--blue);border:1px solid rgba(0,212,255,.35)}
.acts .d:hover{background:rgba(0,212,255,.25)}
.acts .f{background:rgba(139,92,246,.16);color:#c4b5fd;border:1px solid rgba(139,92,246,.4)}
.acts .f:hover{background:rgba(139,92,246,.3)}

/* ---------- 产品详情页 ---------- */
.detail-head{display:flex;align-items:flex-start;gap:18px;flex-wrap:wrap;margin-bottom:8px}
.detail-head .ico{width:64px;height:64px;border-radius:16px;background:var(--flow);display:grid;place-items:center;font-size:28px;flex:0 0 auto;box-shadow:0 0 30px rgba(139,92,246,.5)}
.back-link{display:inline-flex;align-items:center;gap:6px;color:var(--muted);text-decoration:none;font-size:13px;margin:12px 0 18px}
.back-link:hover{color:var(--blue)}
.detail-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:24px;align-items:start}
.detail-main .lead{font-size:16px;color:var(--ink);margin-bottom:22px;line-height:1.8}
.detail-main h4{font-size:15px;color:var(--blue);margin:26px 0 14px;letter-spacing:1px}
.feat-list{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.feat-list div{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 14px;font-size:13.5px;display:flex;gap:9px;align-items:center}
.feat-list .ck{color:var(--blue);font-weight:800}
.panel{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:24px;backdrop-filter:blur(12px);position:sticky;top:84px}
.panel .price-big{font-size:30px;font-weight:800}
.panel .price-big small{font-size:14px;color:var(--muted);font-weight:500}
.panel .tier-row{display:flex;justify-content:space-between;padding:11px 0;border-bottom:1px dashed var(--line);font-size:14px}
.panel .tier-row:last-child{border-bottom:none}
.panel .tier-row .v{color:var(--ink);font-weight:600}
.panel .tier-row .v.q{color:var(--magenta)}
.demo-card{background:var(--flow-soft);border:1px solid var(--line);border-radius:14px;padding:16px;margin-top:18px;font-size:13px}
.demo-card .row{display:flex;justify-content:space-between;gap:10px;padding:4px 0}
.demo-card code{background:rgba(0,0,0,.3);padding:2px 8px;border-radius:6px;color:var(--blue);font-size:12px;word-break:break-all}
.rel-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:18px}
.rel-grid .card{padding:16px}
.rel-grid .card h3{font-size:15px}
.rel-grid .card .ico{width:38px;height:38px;font-size:16px;margin-bottom:10px}

/* ---------- 功能说明折叠页 ---------- */
.doc-top{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-bottom:22px}
.doc-top .title h1{font-size:clamp(22px,4vw,32px);font-weight:800}
.doc-top .title .cat{color:var(--blue);font-size:13px}
.doc-layout{display:grid;grid-template-columns:280px 1fr;gap:30px;align-items:start}
.doc-toc{position:sticky;top:84px;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:20px;backdrop-filter:blur(12px);max-height:calc(100vh - 110px);overflow:auto}
.doc-toc .toc-title{font-size:13px;color:var(--muted);letter-spacing:1px;margin-bottom:14px;text-transform:uppercase}
.toc-ch>p{font-weight:700;font-size:15px;cursor:pointer;display:flex;align-items:center;gap:10px;padding:8px 0;user-select:none}
.toc-ch>p .ar{margin-left:auto;color:var(--blue);transition:.25s;font-size:11px}
.toc-ch.open>p .ar{transform:rotate(90deg)}
.toc-ch .sec-list{max-height:0;overflow:hidden;transition:.3s}
.toc-ch.open .sec-list{max-height:400px}
.toc-ch .sec-list a{display:block;color:var(--muted);text-decoration:none;font-size:13px;padding:6px 0 6px 26px;border-left:1px solid var(--line);margin-left:6px;transition:.2s}
.toc-ch .sec-list a:hover,.toc-ch .sec-list a.active{color:#fff;border-left-color:var(--blue)}
.doc-content .block{margin-bottom:30px;scroll-margin-top:90px}
.doc-content .block h3{font-size:19px;font-weight:700;margin-bottom:12px;display:flex;align-items:center;gap:10px}
.doc-content .block h3::before{content:"";width:5px;height:18px;border-radius:3px;background:var(--flow)}
.doc-content .block p{color:var(--muted);margin-bottom:12px;line-height:1.85}
.doc-content .block img{max-width:100%;border-radius:14px;border:1px solid var(--line);margin:6px 0}
.doc-content .block .videoframe{aspect-ratio:16/9;border-radius:14px;overflow:hidden;border:1px solid var(--line);background:#000}
.doc-content table{width:100%;border-collapse:collapse;margin:8px 0;font-size:13.5px}
.doc-content th,.doc-content td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.doc-content th{background:rgba(43,111,255,.16);color:#fff}
.doc-callout{background:var(--flow-soft);border:1px solid rgba(0,212,255,.3);border-radius:12px;padding:14px 16px;font-size:13.5px;color:var(--ink);margin:6px 0 14px}

/* ---------- CTA 条 ---------- */
.cta-band{border-radius:24px;padding:52px 40px;text-align:center;margin:30px 0;
  background:linear-gradient(100deg,#7c3aed,#a855f7 45%,#ff2d9b);position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background:
  radial-gradient(400px 200px at 20% 0%,rgba(255,255,255,.25),transparent 60%),
  radial-gradient(400px 200px at 80% 100%,rgba(0,212,255,.3),transparent 60%)}
.cta-band h2{font-size:clamp(22px,4vw,34px);font-weight:800;margin-bottom:12px;position:relative}
.cta-band p{color:rgba(255,255,255,.88);margin-bottom:24px;position:relative}
.cta-band .btn{background:#fff;color:#7c1fa0;position:relative}
.cta-band .btn:hover{transform:translateY(-2px)}
.cta-band .qr{display:inline-block;width:72px;height:72px;border-radius:12px;background:rgba(255,255,255,.92);position:relative;margin-top:18px}

/* ---------- 页脚 ---------- */
footer{padding:46px 0;border-top:1px solid var(--line);color:var(--muted);font-size:13px;margin-top:30px}
.f-grid{display:flex;justify-content:space-between;flex-wrap:wrap;gap:24px;margin-bottom:24px}
.f-col h4{color:#fff;font-size:14px;margin-bottom:12px}
.f-col a{display:block;color:var(--muted);text-decoration:none;margin-bottom:8px;transition:.2s}
.f-col a:hover{color:var(--blue)}

/* ---------- 滚动入场 ---------- */
.reveal{opacity:0;transform:translateY(34px);transition:.7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* ============================================================
   智能客服组件
   ============================================================ */
.chat-bubble{position:fixed;right:22px;bottom:22px;width:60px;height:60px;border-radius:50%;background:var(--flow);
  display:grid;place-items:center;cursor:pointer;z-index:200;box-shadow:0 10px 30px rgba(255,45,155,.5);transition:.25s}
.chat-bubble:hover{transform:scale(1.08)}
.chat-bubble svg{width:28px;height:28px;fill:#fff}
.chat-panel{position:fixed;right:22px;bottom:92px;width:380px;max-width:calc(100vw - 32px);height:560px;max-height:calc(100vh - 120px);
  background:rgba(10,14,32,.92);border:1px solid rgba(140,170,255,.25);border-radius:18px;z-index:200;
  display:flex;flex-direction:column;overflow:hidden;backdrop-filter:blur(18px);box-shadow:0 24px 60px rgba(0,0,0,.5);
  transform:translateY(20px) scale(.96);opacity:0;pointer-events:none;transition:.25s}
.chat-panel.open{transform:none;opacity:1;pointer-events:auto}
.chat-head{display:flex;align-items:center;gap:10px;padding:14px 16px;background:linear-gradient(90deg,rgba(43,111,255,.4),rgba(255,45,155,.4));border-bottom:1px solid var(--line)}
.chat-head .ava{width:34px;height:34px;border-radius:10px;background:var(--flow);display:grid;place-items:center;font-size:15px;font-weight:900;color:#060a1c}
.chat-head .name{font-weight:700;font-size:15px}
.chat-head .st{font-size:11px;color:#c4f5ff;display:flex;align-items:center;gap:5px}
.chat-head .st .d{width:7px;height:7px;border-radius:50%;background:#5cff9d;box-shadow:0 0 8px #5cff9d}
.chat-head .x{margin-left:auto;cursor:pointer;color:#fff;opacity:.8;font-size:20px;line-height:1}
.chat-msgs{flex:1;overflow:auto;padding:16px;display:flex;flex-direction:column;gap:12px}
.msg{max-width:84%;padding:10px 13px;border-radius:14px;font-size:13.5px;line-height:1.7;word-break:break-word}
.msg.bot{background:rgba(43,111,255,.16);border:1px solid rgba(43,111,255,.3);align-self:flex-start;border-bottom-left-radius:4px}
.msg.me{background:var(--flow);color:#fff;align-self:flex-end;border-bottom-right-radius:4px}
.msg .tip{margin-top:8px;padding-top:8px;border-top:1px solid rgba(255,255,255,.15);font-size:12.5px;color:#c4b5fd}
.msg .tip a{color:#ffd36e;text-decoration:none;font-weight:700}
.chat-input{display:flex;gap:8px;padding:12px;border-top:1px solid var(--line);background:rgba(8,12,30,.5)}
.chat-input input{flex:1;background:rgba(255,255,255,.06);border:1px solid var(--line);border-radius:10px;padding:10px 12px;color:#fff;font-size:13.5px;outline:none}
.chat-input input:focus{border-color:var(--blue)}
.chat-input button{background:var(--flow);border:none;border-radius:10px;color:#fff;padding:0 16px;font-weight:700;cursor:pointer}
.chat-kb{font-size:11px;color:var(--dim);padding:0 16px 10px}
.chat-kb b{color:var(--blue)}

/* ============================================================
   后台管理
   ============================================================ */
.admin-body{display:grid;grid-template-columns:220px 1fr;min-height:100vh}
.admin-side{background:rgba(8,12,30,.7);border-right:1px solid var(--line);padding:20px 14px}
.admin-side .logo{margin-bottom:24px}
.admin-side a{display:block;color:var(--muted);text-decoration:none;padding:11px 14px;border-radius:10px;font-size:14px;margin-bottom:4px;transition:.2s;cursor:pointer}
.admin-side a:hover,.admin-side a.on{background:rgba(43,111,255,.18);color:#fff}
.admin-main{padding:28px 32px;overflow:auto}
.admin-main h2{font-size:22px;margin-bottom:6px}
.admin-main .sub{color:var(--muted);font-size:13px;margin-bottom:22px}
.toolbar{display:flex;gap:10px;margin-bottom:18px;flex-wrap:wrap;align-items:center}
.search-inp{background:rgba(255,255,255,.06);border:1px solid var(--line);border-radius:10px;padding:9px 12px;color:#fff;font-size:13px;outline:none;min-width:220px}
.table{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden;font-size:13.5px}
.table th,.table td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line)}
.table th{background:rgba(43,111,255,.14);color:#fff;font-weight:600}
.table tr:last-child td{border-bottom:none}
.table .op a{color:var(--blue);text-decoration:none;margin-right:12px;cursor:pointer}
.table .op a.del{color:var(--magenta)}
.badge{font-size:11px;padding:2px 9px;border-radius:999px;background:rgba(0,212,255,.16);color:var(--blue);border:1px solid rgba(0,212,255,.3)}
.modal-mask{position:fixed;inset:0;background:rgba(2,5,15,.7);z-index:300;display:none;align-items:flex-start;justify-content:center;overflow:auto;padding:40px 16px}
.modal-mask.open{display:flex}
.modal{width:640px;max-width:100%;background:rgba(14,20,44,.98);border:1px solid rgba(140,170,255,.3);border-radius:18px;padding:26px;box-shadow:0 24px 60px rgba(0,0,0,.5)}
.modal h3{font-size:18px;margin-bottom:18px}
.form-row{margin-bottom:14px}
.form-row label{display:block;font-size:12.5px;color:var(--muted);margin-bottom:6px}
.form-row input,.form-row textarea,.form-row select{width:100%;background:rgba(255,255,255,.06);border:1px solid var(--line);border-radius:10px;padding:10px 12px;color:#fff;font-size:13.5px;outline:none;font-family:inherit}
.form-row input:focus,.form-row textarea:focus{border-color:var(--blue)}
.form-row textarea{resize:vertical;min-height:80px}
.form-2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.modal .acts{display:flex;gap:10px;justify-content:flex-end;margin-top:8px}
.upload-box{border:1.5px dashed rgba(140,170,255,.4);border-radius:12px;padding:18px;text-align:center;cursor:pointer;color:var(--muted);font-size:13px;transition:.2s}
.upload-box:hover{border-color:var(--blue);color:#fff}
.upload-box img{max-width:100%;border-radius:8px;margin-top:10px}
.tree-edit{border:1px solid var(--line);border-radius:12px;padding:14px;background:rgba(255,255,255,.02)}
.tree-ch{border:1px solid var(--line);border-radius:10px;padding:12px;margin-bottom:10px;background:rgba(255,255,255,.03)}
.tree-ch .ch-head{display:flex;gap:8px;align-items:center;margin-bottom:8px}
.tree-ch .sec-item{border-left:2px solid var(--blue);padding:8px 12px;margin:6px 0 6px 14px;background:rgba(43,111,255,.06);border-radius:0 8px 8px 0}
.tree-ch .sec-item .si-head{display:flex;gap:8px;align-items:center;font-size:13px}
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);background:rgba(20,28,56,.95);
  border:1px solid var(--blue);color:#fff;padding:12px 22px;border-radius:12px;font-size:14px;z-index:400;opacity:0;transition:.3s;pointer-events:none}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.login-box{max-width:380px;margin:14vh auto 0;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:34px;text-align:center;backdrop-filter:blur(12px)}
.login-box h2{font-size:22px;margin-bottom:8px}
.login-box p{color:var(--muted);font-size:13px;margin-bottom:22px}
.login-box input{width:100%;background:rgba(255,255,255,.06);border:1px solid var(--line);border-radius:10px;padding:12px;color:#fff;margin-bottom:14px;outline:none;text-align:center}

/* ============================================================
   响应式
   ============================================================ */
@media(max-width:980px){
  .detail-grid{grid-template-columns:1fr}
  .panel{position:static}
  .doc-layout{grid-template-columns:1fr}
  .doc-toc{position:static;max-height:none}
  .rel-grid{grid-template-columns:repeat(2,1fr)}
  .admin-body{grid-template-columns:1fr}
  .admin-side{display:flex;gap:6px;overflow:auto;border-right:none;border-bottom:1px solid var(--line)}
  .admin-side a{margin:0;white-space:nowrap}
}
@media(max-width:900px){
  .grid{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:600px){
  .grid{grid-template-columns:1fr}
  .feat-list{grid-template-columns:1fr}
  .rel-grid{grid-template-columns:1fr}
  .nav-links{display:none}
  .slide{padding:42px 28px}
  .chat-panel{right:10px;bottom:84px;width:calc(100vw - 20px)}
}