/* ============================================================
   AI 产业链地图 · 克隆版  —  深色霓虹「神经网格」科技风
   与原文浅色编辑风完全不同：深空navy + 青/紫霓虹 + 玻璃拟态
   ============================================================ */
:root{
  --bg:#070b14;
  --bg2:#0b1120;
  --panel:rgba(255,255,255,.04);
  --panel-strong:rgba(255,255,255,.06);
  --border:rgba(255,255,255,.09);
  --border-strong:rgba(120,200,255,.28);
  --text:#e7eefb;
  --text-dim:#9fb0c9;
  --text-faint:#6b7c97;
  --cyan:#22d3ee;
  --violet:#a855f7;
  --green:#34d399;
  --pink:#f472b6;
  --amber:#f59e0b;
  --lime:#a3e635;
  --glow-cyan:0 0 24px rgba(34,211,238,.45);
  --glow-violet:0 0 24px rgba(168,85,247,.40);
  --l1:var(--amber);
  --l2:var(--cyan);
  --l3:var(--violet);
  --l4:var(--green);
  --l5:var(--pink);
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --sans:"Inter",-apple-system,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --radius:16px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:var(--sans);
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
  position:relative;
  overflow-x:hidden;
}
/* 动态网格 + 径向辉光背景 */
body::before{
  content:"";position:fixed;inset:0;z-index:-2;
  background:
    radial-gradient(900px 600px at 12% -10%, rgba(34,211,238,.16), transparent 60%),
    radial-gradient(1000px 700px at 100% 0%, rgba(168,85,247,.14), transparent 55%),
    radial-gradient(800px 800px at 50% 120%, rgba(52,211,153,.10), transparent 60%),
    var(--bg);
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;opacity:.5;
  background-image:
    linear-gradient(rgba(120,170,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,170,255,.05) 1px, transparent 1px);
  background-size:46px 46px;
  mask-image:radial-gradient(ellipse 100% 80% at 50% 30%, #000 40%, transparent 100%);
  animation:gridmove 24s linear infinite;
}
@keyframes gridmove{from{background-position:0 0,0 0}to{background-position:46px 46px,46px 46px}}

a{color:inherit;text-decoration:none}
::selection{background:rgba(34,211,238,.35);color:#fff}

/* ---------- 顶部导航 ---------- */
.topbar{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;gap:18px;
  padding:14px 26px;
  background:rgba(7,11,20,.72);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);
}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:.5px}
.brand .logo{
  width:34px;height:34px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--glow-cyan);overflow:hidden;
}
.brand .name{font-size:16px}
.brand .name b{background:linear-gradient(90deg,var(--cyan),var(--violet));-webkit-background-clip:text;background-clip:text;color:transparent}
.brand .tag{font-size:11px;color:var(--text-faint);font-family:var(--mono);letter-spacing:1px}
.nav{display:flex;gap:4px;margin-left:auto;flex-wrap:wrap}
.nav a{
  padding:7px 13px;border-radius:10px;font-size:13.5px;color:var(--text-dim);
  border:1px solid transparent;transition:.18s;
}
.nav a:hover{color:var(--text);background:var(--panel);border-color:var(--border)}
.nav a.active{color:var(--cyan);background:rgba(34,211,238,.08);border-color:var(--border-strong)}
.searchbox{
  display:flex;align-items:center;gap:8px;background:var(--panel);
  border:1px solid var(--border);border-radius:11px;padding:7px 12px;min-width:210px;
}
.searchbox input{
  background:transparent;border:0;outline:0;color:var(--text);font-size:13.5px;width:100%;font-family:var(--sans);
}
.searchbox input::placeholder{color:var(--text-faint)}
.searchbox .ic{color:var(--cyan)}

/* ---------- 布局 ---------- */
.wrap{max-width:1240px;margin:0 auto;padding:30px 26px 80px}
.section{margin-top:54px}
.section h2{font-size:21px;margin:0 0 4px;display:flex;align-items:center;gap:10px}
.section h2 .num{
  font-family:var(--mono);font-size:13px;color:var(--cyan);
  border:1px solid var(--border-strong);border-radius:8px;padding:2px 8px;
}
.section .sub{color:var(--text-dim);font-size:13.5px;margin:0 0 20px}

/* ---------- 卡片 ---------- */
.card{
  background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);
  padding:18px 20px;transition:.2s;position:relative;overflow:hidden;
}
.card:hover{border-color:var(--border-strong);background:var(--panel-strong);transform:translateY(-3px);box-shadow:var(--glow-cyan)}
.chip{
  display:inline-flex;align-items:center;gap:5px;font-size:11.5px;font-family:var(--mono);
  padding:3px 9px;border-radius:999px;border:1px solid var(--border);color:var(--text-dim);
}
.chip.l1{color:var(--l1);border-color:rgba(245,158,11,.4)}
.chip.l2{color:var(--l2);border-color:rgba(34,211,238,.4)}
.chip.l3{color:var(--l3);border-color:rgba(168,85,247,.4)}
.chip.l4{color:var(--l4);border-color:rgba(52,211,153,.4)}
.chip.l5{color:var(--l5);border-color:rgba(244,114,182,.4)}

/* ---------- Hero ---------- */
.hero{padding:40px 0 8px;position:relative}
.hero .eyebrow{font-family:var(--mono);color:var(--cyan);letter-spacing:3px;font-size:12px;text-transform:uppercase}
.hero h1{font-size:40px;line-height:1.15;margin:14px 0 10px;font-weight:850;letter-spacing:-.5px}
.hero h1 .grad{background:linear-gradient(100deg,var(--cyan),var(--violet) 55%,var(--pink));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{color:var(--text-dim);font-size:15.5px;max-width:720px}
.stat-row{display:grid;grid-template-columns:repeat(6,1fr);gap:12px;margin-top:28px}
.stat{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:16px;text-align:center}
.stat .n{font-size:26px;font-weight:800;font-family:var(--mono);color:var(--cyan);text-shadow:var(--glow-cyan)}
.stat .l{font-size:12px;color:var(--text-faint);margin-top:4px}

/* 四大入口 */
.four-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.entrance{
  display:block;padding:22px 20px;border-radius:var(--radius);position:relative;overflow:hidden;
  background:linear-gradient(160deg,var(--panel-strong),var(--panel));
  border:1px solid var(--border);transition:.22s;
}
.entrance:hover{transform:translateY(-4px);border-color:var(--border-strong);box-shadow:var(--glow-violet)}
.entrance .glyph{font-size:26px;margin-bottom:12px;display:inline-block;
  filter:drop-shadow(0 0 10px rgba(34,211,238,.6))}
.entrance h3{margin:0 0 6px;font-size:17px}
.entrance p{margin:0;font-size:12.8px;color:var(--text-dim)}
.entrance .go{margin-top:14px;font-size:12.5px;color:var(--cyan);font-family:var(--mono)}
.entrance .badge{position:absolute;top:14px;right:14px;font-family:var(--mono);font-size:10.5px;color:var(--lime);
  border:1px solid rgba(163,230,53,.4);border-radius:999px;padding:2px 8px;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.45}}

/* 网格通用 */
.grid{display:grid;gap:14px}
.grid.c2{grid-template-columns:repeat(2,1fr)}
.grid.c3{grid-template-columns:repeat(3,1fr)}
.grid.c4{grid-template-columns:repeat(4,1fr)}
.grid.c5{grid-template-columns:repeat(5,1fr)}
.grid.auto{grid-template-columns:repeat(auto-fill,minmax(190px,1fr))}

/* 列表项（索引） */
.idx-item{display:flex;align-items:center;gap:12px;padding:13px 16px;border-radius:13px;
  background:var(--panel);border:1px solid var(--border);transition:.18s}
.idx-item:hover{border-color:var(--border-strong);background:var(--panel-strong)}
.idx-item .rank{font-family:var(--mono);color:var(--text-faint);font-size:13px;width:26px;text-align:right}
.idx-item .nm{font-weight:650;font-size:14.5px}
.idx-item .meta{color:var(--text-faint);font-size:12px;font-family:var(--mono)}
.idx-item .refs{margin-left:auto;font-family:var(--mono);font-size:12px;color:var(--violet)}
.group-title{font-size:14px;color:var(--text-dim);margin:22px 0 10px;font-weight:700;display:flex;align-items:center;gap:8px}
.group-title .bar{width:4px;height:16px;border-radius:2px;background:var(--cyan)}

/* 详情页 */
.detail-head{display:flex;flex-wrap:wrap;align-items:flex-start;gap:16px;margin-bottom:8px}
.detail-head h1{font-size:30px;margin:0}
.detail-head .ticker{font-family:var(--mono);font-size:13px;color:var(--cyan)}
.detail-body{font-size:15px;color:var(--text);margin:18px 0}
.detail-body p{margin:0 0 12px}
.links-col{margin-top:26px}
.links-col h4{font-size:14px;color:var(--text-dim);margin:0 0 12px;display:flex;align-items:center;gap:8px}
.links-col h4 .ct{font-family:var(--mono);color:var(--violet);background:rgba(168,85,247,.1);border:1px solid rgba(168,85,247,.35);border-radius:7px;padding:1px 8px;font-size:12px}
.linkpill{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;margin:0 8px 8px 0;border-radius:10px;
  background:var(--panel);border:1px solid var(--border);font-size:13px;transition:.16s}
.linkpill:hover{border-color:var(--border-strong);color:var(--cyan);background:var(--panel-strong)}
.linkpill .t{font-family:var(--mono);font-size:10px;color:var(--text-faint);text-transform:uppercase}

/* 五层蛋糕 */
.cake{display:flex;flex-direction:column;gap:10px;margin-top:18px}
.layer-band{border-radius:14px;padding:16px 18px;border:1px solid var(--border);position:relative;overflow:hidden}
.layer-band .lh{display:flex;align-items:center;gap:12px;margin-bottom:10px}
.layer-band .lh .ln{font-family:var(--mono);font-size:13px;width:30px;height:30px;display:grid;place-items:center;border-radius:9px;font-weight:800}
.layer-band .lh .lt{font-size:17px;font-weight:750}
.layer-band .lh .lc{margin-left:auto;font-family:var(--mono);font-size:12px;color:var(--text-faint)}
.layer-band .lh .ld{font-size:12.5px;color:var(--text-dim);width:100%}
.mini-sectors{display:flex;flex-wrap:wrap;gap:7px}

/* Atlas */
.atlas-wrap{position:relative;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;
  background:linear-gradient(180deg,rgba(10,16,32,.6),rgba(7,11,20,.9))}
#atlas-canvas{display:block;width:100%;height:620px}
.atlas-legend{position:absolute;top:14px;left:14px;display:flex;flex-direction:column;gap:6px;
  background:rgba(7,11,20,.6);border:1px solid var(--border);border-radius:12px;padding:12px 14px;backdrop-filter:blur(6px)}
.atlas-legend .li{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--text-dim)}
.atlas-legend .dot{width:11px;height:11px;border-radius:50%}
.atlas-tip{position:absolute;pointer-events:none;background:rgba(7,11,20,.92);border:1px solid var(--border-strong);
  border-radius:10px;padding:8px 12px;font-size:12.5px;max-width:240px;opacity:0;transition:.12s;z-index:5}
.atlas-ctrl{display:flex;gap:8px;margin:12px 0;flex-wrap:wrap}
.btn{cursor:pointer;font-family:var(--sans);font-size:13px;padding:8px 14px;border-radius:10px;
  background:var(--panel);border:1px solid var(--border);color:var(--text);transition:.16s}
.btn:hover{border-color:var(--border-strong);color:var(--cyan)}
.btn.primary{background:linear-gradient(135deg,var(--cyan),var(--violet));color:#06121f;border:0;font-weight:700;box-shadow:var(--glow-cyan)}

/* Serenity 看板 */
.board{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.board-col h3{font-size:14px;color:var(--text-dim);display:flex;align-items:center;gap:8px;margin:0 0 12px}
.board-col.cn h3 .flag{color:var(--pink)}
.board-col.en h3 .flag{color:var(--cyan)}
.feed-item{display:flex;gap:11px;padding:13px 15px;border-radius:12px;background:var(--panel);border:1px solid var(--border);margin-bottom:10px;transition:.16s}
.feed-item:hover{border-color:var(--border-strong)}
.feed-item .ts{font-family:var(--mono);font-size:11px;color:var(--text-faint);white-space:nowrap}
.feed-item .txt{font-size:13.5px}
.feed-item .src{font-size:11px;color:var(--violet);font-family:var(--mono)}
.live-dot{width:8px;height:8px;border-radius:50%;background:var(--lime);box-shadow:0 0 10px var(--lime);animation:pulse 1.5s infinite}
.serenity-status{font-family:var(--mono);font-size:12.5px;color:var(--text-dim);background:var(--panel);
  border:1px solid var(--border);border-radius:11px;padding:10px 14px;margin-bottom:16px;word-break:break-all}

/* Reports / Course */
.report-card{display:block;padding:18px 20px;border-radius:14px;background:var(--panel);border:1px solid var(--border);transition:.2s;cursor:pointer}
.report-card:hover{border-color:var(--border-strong);transform:translateY(-3px);box-shadow:var(--glow-violet)}
.report-card .rh{display:flex;justify-content:space-between;align-items:baseline;gap:10px}
.report-card h3{margin:0;font-size:16px}
.report-card .date{font-family:var(--mono);font-size:11.5px;color:var(--text-faint)}
.report-card p{margin:10px 0 0;font-size:13px;color:var(--text-dim)}
.report-card .tags{margin-top:12px;display:flex;gap:6px;flex-wrap:wrap}
.lesson{display:flex;gap:14px;padding:16px 18px;border-radius:13px;background:var(--panel);border:1px solid var(--border)}
.lesson .ep{font-family:var(--mono);font-size:13px;color:var(--violet);border:1px solid rgba(168,85,247,.4);border-radius:9px;padding:4px 10px;height:fit-content}
.lesson h3{margin:0 0 5px;font-size:15.5px}
.lesson p{margin:0;font-size:13px;color:var(--text-dim)}

/* 搜索结果 */
.search-hit{padding:14px 16px;border-radius:12px;background:var(--panel);border:1px solid var(--border);margin-bottom:10px;display:flex;gap:12px;align-items:center}
.search-hit .nm{font-weight:650}
.search-hit .snip{font-size:12.5px;color:var(--text-faint);margin-top:3px}
.search-hit mark{background:rgba(34,211,238,.3);color:#fff;border-radius:3px;padding:0 2px}
.empty{text-align:center;color:var(--text-faint);padding:60px 0;font-family:var(--mono)}

footer{margin-top:70px;padding:26px;border-top:1px solid var(--border);color:var(--text-faint);font-size:12.5px;text-align:center;font-family:var(--mono)}

/* 响应式 */
@media(max-width:980px){
  .stat-row{grid-template-columns:repeat(3,1fr)}
  .four-grid{grid-template-columns:repeat(2,1fr)}
  .grid.c4,.grid.c5{grid-template-columns:repeat(2,1fr)}
  .board{grid-template-columns:1fr}
}
@media(max-width:640px){
  .nav{display:none}
  .hero h1{font-size:30px}
  .stat-row,.four-grid,.grid.c2,.grid.c3,.grid.c4,.grid.c5{grid-template-columns:1fr}
  .searchbox{min-width:0;flex:1}
}

/* ===== 报告/大课 点击展开（需求#3） ===== */
.report-card,.lesson{cursor:pointer;transition:border-color .2s,transform .15s,box-shadow .2s}
.report-card:hover,.lesson:hover{border-color:var(--border-strong);box-shadow:0 0 18px rgba(34,211,238,.12)}
.report-card.open,.lesson.open{border-color:var(--cyan);box-shadow:0 0 22px rgba(34,211,238,.2)}
.card-hint{margin-top:8px;font-size:11.5px;color:var(--text-faint);font-family:var(--mono);opacity:.8}
.report-detail,.lesson-detail{margin-top:12px;padding:14px 16px;border-left:3px solid var(--cyan);
  background:rgba(34,211,238,.05);border-radius:0 10px 10px 0;animation:fadein .25s ease}
.rd-desc{margin:0 0 10px;font-size:14px;color:var(--text)}
.rd-meta{font-size:12px;color:var(--text-faint);font-family:var(--mono);margin-top:8px}
.rd-header{display:flex;align-items:center;gap:8px;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--border)}
.rd-header h4,.rd-sec-title{font-size:15px;font-weight:600;color:var(--cyan);margin:0 0 8px}
.rd-sec{margin-bottom:16px}
.rd-sec:last-child{margin-bottom:0}
.rd-sec-body{font-size:13.5px;line-height:1.7;color:var(--text)}
.rd-sec-body b{color:var(--text-bright)}
@keyframes fadein{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

/* ===== 登录/订阅（需求#4） ===== */
.nav-login{margin-left:8px;color:var(--cyan)!important;border:1px solid var(--border-strong);border-radius:20px;padding:5px 14px!important;font-size:13px}
.nav-login:hover{background:rgba(34,211,238,.1)}
.modal-mask{display:none;position:fixed;inset:0;z-index:99;background:rgba(3,7,15,.72);
  backdrop-filter:blur(4px);align-items:center;justify-content:center}
.modal{position:relative;width:340px;max-width:92vw;background:var(--bg2);border:1px solid var(--border-strong);
  border-radius:18px;padding:22px;box-shadow:0 0 40px rgba(34,211,238,.25)}
.modal-close{position:absolute;top:10px;right:14px;background:none;border:none;color:var(--text-dim);font-size:22px;cursor:pointer}
.modal-tabs{display:flex;gap:8px;margin-bottom:14px}
.modal-tabs button{flex:1;background:var(--panel);border:1px solid var(--border);color:var(--text-dim);
  padding:8px;border-radius:10px;cursor:pointer;font-family:var(--sans)}
.modal-tabs button.active{border-color:var(--cyan);color:var(--cyan)}
.modal input,.me-add input,.me-add select{width:100%;margin:6px 0;padding:9px 11px;background:var(--bg);
  border:1px solid var(--border);border-radius:10px;color:var(--text);font-family:var(--sans);font-size:13px}
.modal .primary,.me-add .primary,.me-sec .primary{width:100%;margin-top:8px;padding:9px;border-radius:10px;cursor:pointer;
  background:linear-gradient(135deg,var(--cyan),var(--violet));border:none;color:#06121f;font-weight:700}
.m-err,.m-err2{color:var(--pink);font-size:12.5px;margin-top:8px;min-height:18px;line-height:1.4;
  padding:6px 10px;border-radius:8px;background:rgba(244,114,182,.10);border:1px solid rgba(244,114,182,.20);
  word-break:break-word}
/* 密码显示切换 */
.pwd-wrap{position:relative;margin:6px 0}
.pwd-wrap input{padding-right:38px!important}
.pwd-toggle{position:absolute;right:8px;top:50%;transform:translateY(-50%);background:none;border:none;
  cursor:pointer;font-size:15px;padding:4px 6px;color:var(--text-dim);line-height:1}
.pwd-toggle:hover{color:var(--cyan)}
/* 按钮 loading 状态 */
.btn-loading-target.loading{opacity:.65;cursor:not-allowed;pointer-events:none;
  background:linear-gradient(135deg,#334155,#1e293b)!important;box-shadow:none!important}
/* 第三方登录 */
.third-party{margin-top:14px}
.tp-divider{text-align:center;font-size:11.5px;color:var(--text-faint);margin-bottom:10px;
  position:relative}
.tp-divider::before,.tp-divider::after{content:"";position:absolute;top:50%;width:30%;
  height:1px;background:var(--border)}
.tp-divider::before{left:0}.tp-divider::after{right:0}
.tp-btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:9px;
  margin-bottom:8px;border-radius:10px;cursor:pointer;font-family:var(--sans);font-size:13px;
  font-weight:600;transition:all .2s;border:1px solid var(--border);background:var(--panel);color:var(--text)}
.tp-btn:hover{background:var(--panel-strong);transform:translateY(-1px)}
.tp-btn .tp-icon{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;
  border-radius:6px;font-size:13px;font-weight:800}
.tp-github:hover{border-color:#888;color:#fff;background:#24292e}
.tp-github .tp-icon{background:#333;color:#fff}
.tp-google:hover{border-color:#ea4335;color:#fff;background:linear-gradient(135deg,#4285f4,#ea4335)}
.tp-google .tp-icon{background:linear-gradient(135deg,#4285f4,#ea4335);color:#fff}
#me-login{color:var(--cyan);cursor:pointer}
.me-sec{margin-bottom:26px;padding:18px;border:1px solid var(--border);border-radius:14px;background:var(--panel)}
.me-sec h2{margin:0 0 12px;font-size:17px;color:var(--cyan)}
.me-sec h3{margin:14px 0 6px;font-size:14px;color:var(--text-dim)}
.me-ch{display:flex;align-items:center;gap:10px;padding:10px 12px;margin-bottom:8px;border:1px solid var(--border);
  border-radius:10px;background:var(--bg2)}
.me-ch-name{font-weight:650;flex:1}
.me-ch-meta{font-size:11.5px;color:var(--text-faint);font-family:var(--mono);flex:2;text-align:right;margin-right:8px}
.me-ch-del{background:none;border:1px solid var(--pink);color:var(--pink);border-radius:8px;padding:4px 10px;cursor:pointer;font-size:12px}
.me-add{margin-top:8px}
.me-subs{display:flex;flex-wrap:wrap;gap:10px;margin:8px 0}
.me-levels{display:flex;flex-wrap:wrap;gap:10px;margin:8px 0}
.me-sub-group{margin:6px 0 14px;padding:10px 12px;border:1px dashed var(--border);border-radius:10px;background:var(--bg2)}
.me-sub{display:flex;align-items:center;gap:6px;font-size:13.5px;color:var(--text-dim);cursor:pointer}
.me-hint{font-size:11.5px;color:var(--text-faint);margin-top:4px}
.empty.small{padding:14px 0;font-size:13px}