/* ==========================================================
   astudy-industry.css —— 产业学院各行业研究页通用样式
   青铜/金色主题，与 astudy.html 中的 industry faction 保持一致
   ========================================================== */

* { margin:0; padding:0; box-sizing:border-box; }
:root {
  --bronze:#8b6b3a; --bronze-br:#c9a36a; --bronze-pale:#e4c995;
  --gold:#d4a93b; --gold-br:#f4c869; --gold-pale:#f6e2a6;
  --text:#e8eeff; --text-soft:#b4a582; --text-muted:#8a7a5c;
  --bg-deep:#120d05; --bg-mid:#1a140a; --bg-card:#2a1f12;

  --good:#48bb78; --good-bg:rgba(72,187,120,.08); --good-br:rgba(72,187,120,.3);
  --risk:#f56565; --risk-bg:rgba(245,101,101,.08); --risk-br:rgba(245,101,101,.3);
  --info:rgba(201,163,106,.08); --info-br:rgba(201,163,106,.3);
}

body {
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro SC","PingFang SC","Microsoft YaHei","Songti SC",serif;
  min-height:100vh; color:var(--text);
  background:
    radial-gradient(ellipse 120% 80% at 50% 0%, rgba(139,107,58,.35) 0%, transparent 55%),
    linear-gradient(180deg,#1a140a 0%,#0c0904 50%,#050302 100%);
  background-attachment:fixed; padding-bottom:60px;
}
a { text-decoration:none; color:inherit; }

/* 顶部金边 */
.top-band { position:fixed; top:0; left:0; right:0; height:4px;
  background:linear-gradient(90deg,var(--bronze),var(--bronze-br),var(--gold-br),var(--bronze-br),var(--bronze));
  box-shadow:0 0 20px rgba(201,163,106,.5); z-index:10; }

/* 导航 */
.nav { position:sticky; top:0; z-index:50; display:flex; justify-content:center;
  padding:14px 24px; background:rgba(26,20,10,.72); backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(201,163,106,.28); }
.nav-inner { max-width:1080px; width:100%; display:flex; align-items:center; justify-content:space-between; gap:12px; }
.brand { color:var(--bronze-pale); font-weight:700; letter-spacing:2px; font-size:15px;
  display:flex; align-items:center; gap:8px; }
.back-btn { padding:6px 16px; border-radius:999px; border:1px solid rgba(201,163,106,.4);
  background:rgba(139,107,58,.22); color:var(--bronze-pale);
  font-size:12px; cursor:pointer; font-family:inherit; white-space:nowrap; }
.back-btn:hover { background:rgba(139,107,58,.38); border-color:var(--bronze-br); }

/* 内容容器 */
.wrap { max-width:960px; margin:0 auto; padding:40px 24px; }
.breadcrumb { font-size:12px; color:var(--text-soft); letter-spacing:2px; margin-bottom:16px; }
.breadcrumb a { color:var(--bronze-br); }
.breadcrumb a:hover { color:var(--gold-br); }

.page-title { font-size:34px; font-weight:900; letter-spacing:6px; color:var(--gold-pale);
  text-shadow:0 2px 8px rgba(0,0,0,.5); margin-bottom:8px; }
.page-sub { font-size:14px; color:var(--text-soft); letter-spacing:1.5px; line-height:1.85; max-width:780px; }

/* 行业快照条 */
.snap-bar { display:grid; grid-template-columns:repeat(auto-fit,minmax(150px,1fr)); gap:12px; margin:24px 0 6px; }
.snap-card {
  background:linear-gradient(155deg,var(--bg-card),var(--bg-mid));
  border:1px solid rgba(201,163,106,.25); border-radius:10px; padding:14px 16px;
  border-top:3px solid var(--bronze-br);
}
.snap-card .snap-label { font-size:11px; color:var(--text-soft); letter-spacing:1px; margin-bottom:4px; }
.snap-card .snap-val { font-size:18px; font-weight:900; color:var(--gold-pale);
  font-family:"SF Mono",monospace; letter-spacing:.5px; }
.snap-card .snap-note { font-size:11px; color:var(--bronze-br); margin-top:2px; }

/* 分节标题 */
.sec { margin-top:36px; }
.sec h2 { font-size:20px; font-weight:900; letter-spacing:3px; color:var(--gold-pale);
  padding-bottom:10px; margin-bottom:16px;
  border-bottom:2px solid rgba(212,169,59,.3);
  display:flex; align-items:center; gap:10px; }
.sec h2::before { content:''; width:4px; height:22px;
  background:linear-gradient(180deg,var(--bronze-br),var(--gold-br)); border-radius:2px; }
.sec p { font-size:14px; line-height:2; color:#d0daee; margin-bottom:10px; letter-spacing:.5px; }
.sec strong { color:var(--gold-pale); font-weight:800; }
.sec em { color:var(--bronze-br); font-style:normal; font-weight:600; }

/* 通用卡片 */
.card {
  background:linear-gradient(155deg,var(--bg-card),var(--bg-mid));
  border:1px solid rgba(201,163,106,.25); border-radius:14px;
  padding:22px 24px; box-shadow:0 6px 24px rgba(0,0,0,.4);
  margin-bottom:14px;
}
.card h3 { font-size:16px; font-weight:800; color:var(--gold-pale); letter-spacing:2px; margin-bottom:10px; }
.card p { font-size:13.5px; line-height:1.9; color:#c4d0e4; }
.card ul, .card ol { padding-left:22px; font-size:13.5px; line-height:1.9; color:#c4d0e4; }
.card li { margin-bottom:4px; }
.card li::marker { color:var(--gold-br); }

/* 收入/结构对比条 */
.rev-split { display:flex; flex-direction:column; gap:10px; margin:16px 0; }
.rev-row { display:grid; grid-template-columns:160px 1fr 80px; gap:12px; align-items:center; font-size:13px; }
.rev-name { color:var(--bronze-pale); font-weight:700; }
.rev-bar { height:16px; background:rgba(201,163,106,.1); border-radius:4px; overflow:hidden; }
.rev-bar .fill { height:100%; border-radius:4px;
  background:linear-gradient(90deg,var(--bronze-br),var(--gold-br)); }
.rev-bar .fill.dim { background:linear-gradient(90deg,#9a7b4a,#c9a36a); }
.rev-pct { color:var(--gold-pale); font-family:"SF Mono",monospace; font-weight:800; text-align:right; }

/* 商业模式四象限 */
.model-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); gap:14px; margin-bottom:14px; }
.model-card {
  background:linear-gradient(155deg,var(--bg-card),var(--bg-mid));
  border:1px solid rgba(201,163,106,.22); border-radius:12px;
  padding:18px 20px; box-shadow:0 6px 20px rgba(0,0,0,.4);
}
.model-card .m-icon { font-size:26px; margin-bottom:6px; }
.model-card h4 { font-size:14.5px; font-weight:800; color:var(--gold-pale); letter-spacing:1.5px; margin-bottom:6px; }
.model-card p { font-size:13px; line-height:1.8; color:#c4d0e4; }
.model-card .m-tag { display:inline-block; padding:2px 10px; border-radius:999px;
  font-size:11px; font-family:"SF Mono",monospace; letter-spacing:1px; margin-bottom:8px; }
.model-card .m-tag.good { background:rgba(72,187,120,.15); color:var(--good); border:1px solid var(--good-br); }
.model-card .m-tag.risk { background:rgba(245,101,101,.15); color:var(--risk); border:1px solid var(--risk-br); }
.model-card .m-tag.neutral { background:rgba(201,163,106,.15); color:var(--bronze-br); border:1px solid rgba(201,163,106,.3); }

/* 关键指标卡 */
.metric-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:12px; }
.metric-card {
  background:linear-gradient(155deg,var(--bg-card),var(--bg-mid));
  border:1px solid rgba(201,163,106,.22); border-radius:10px; padding:16px 18px;
  border-left:3px solid var(--bronze-br);
}
.metric-card .mk-name { font-size:13.5px; font-weight:800; color:var(--gold-pale); letter-spacing:1px; margin-bottom:4px; }
.metric-card .mk-def { font-size:12px; color:var(--text-soft); line-height:1.7; margin-bottom:6px; }
.metric-card .mk-bench { font-size:11.5px; color:var(--bronze-br); font-family:"SF Mono",monospace; letter-spacing:.5px; }

/* 横向对比表 */
.tbl-wrap { overflow-x:auto; margin:16px 0; border-radius:10px;
  border:1px solid rgba(201,163,106,.2); }
.tbl-wrap table { width:100%; border-collapse:collapse; font-size:13px; min-width:720px; }
.tbl-wrap th { background:rgba(139,107,58,.25); color:var(--gold-pale); font-weight:800;
  letter-spacing:1px; padding:12px 14px; text-align:left;
  border-bottom:2px solid rgba(212,169,59,.35); font-size:12px; white-space:nowrap; }
.tbl-wrap td { padding:11px 14px; color:#c4d0e4; border-bottom:1px solid rgba(201,163,106,.12); line-height:1.6; }
.tbl-wrap td.code { font-family:"SF Mono",monospace; color:var(--bronze-pale); font-weight:700; }
.tbl-wrap td.num { font-family:"SF Mono",monospace; text-align:right; color:var(--gold-pale); }
.tbl-wrap tr:hover td { background:rgba(201,163,106,.06); }
.tbl-wrap .highlight-row td { background:rgba(244,200,105,.06); }

/* 高亮提示框 */
.hl-box { padding:18px 22px; background:var(--info); border:1px solid var(--info-br);
  border-radius:12px; margin:16px 0; }
.hl-box.warn { background:var(--risk-bg); border-color:var(--risk-br); }
.hl-box.tip  { background:var(--good-bg); border-color:var(--good-br); }
.hl-box h4 { font-size:14px; font-weight:800; letter-spacing:1px; margin-bottom:6px; color:var(--bronze-br); }
.hl-box.warn h4 { color:var(--risk); }
.hl-box.tip  h4 { color:var(--good); }
.hl-box p { font-size:13px; line-height:1.9; color:#c4d0e4; }
.hl-box ul { padding-left:22px; font-size:13px; line-height:1.9; color:#c4d0e4; margin-top:4px; }
.hl-box li::marker { color:var(--bronze-br); }

/* 时间线 */
.timeline { display:flex; flex-direction:column; gap:14px; position:relative; padding-left:28px; }
.timeline::before { content:''; position:absolute; left:10px; top:6px; bottom:6px;
  width:2px; background:linear-gradient(180deg,var(--bronze-br),transparent); }
.tl-item { position:relative; }
.tl-item::before { content:''; position:absolute; left:-23px; top:6px;
  width:10px; height:10px; border-radius:50%;
  background:var(--bronze-br); box-shadow:0 0 0 3px rgba(201,163,106,.2); }
.tl-item .tl-year { font-size:12px; color:var(--bronze-br); font-family:"SF Mono",monospace; letter-spacing:1px; font-weight:800; }
.tl-item .tl-title { font-size:14.5px; color:var(--gold-pale); font-weight:800; letter-spacing:1px; margin:2px 0; }
.tl-item .tl-desc { font-size:13px; color:#c4d0e4; line-height:1.8; }

/* 产业链分层图 */
.chain { display:grid; grid-template-columns:repeat(auto-fit,minmax(180px,1fr)); gap:10px; margin:14px 0; }
.chain-node {
  background:linear-gradient(155deg,var(--bg-card),var(--bg-mid));
  border:1px solid rgba(201,163,106,.22); border-radius:10px;
  padding:14px 16px; text-align:left;
}
.chain-node .cn-layer { font-size:11px; color:var(--bronze-br); letter-spacing:1px; font-weight:800; margin-bottom:4px; }
.chain-node .cn-name { font-size:14px; color:var(--gold-pale); font-weight:800; margin-bottom:4px; }
.chain-node .cn-desc { font-size:12px; color:var(--text-soft); line-height:1.7; }
.chain-node .cn-leads { font-size:11px; color:var(--bronze-pale); margin-top:6px; font-family:"SF Mono",monospace; }

/* 视频占位 */
.video-placeholder {
  margin-top:20px; padding:28px 24px;
  background:linear-gradient(155deg,#1a1a1a,#000);
  border:1px dashed rgba(201,163,106,.4); border-radius:14px;
  text-align:center; color:var(--bronze-pale); letter-spacing:2px;
}
.video-placeholder .vp-icon { font-size:36px; margin-bottom:10px; }
.video-placeholder .vp-title { font-size:15px; font-weight:800; color:var(--gold-pale); margin-bottom:6px; }
.video-placeholder .vp-desc { font-size:12.5px; color:var(--text-soft); letter-spacing:1px; line-height:1.8; }

/* 免责声明 */
.disclaimer { text-align:center; margin-top:32px; font-size:12px;
  color:var(--text-muted); letter-spacing:1px; }

/* 响应式 */
@media (max-width:680px) {
  .page-title { font-size:26px; letter-spacing:4px; }
  .wrap { padding:24px 16px; }
  .model-grid { grid-template-columns:1fr; }
  .metric-grid { grid-template-columns:1fr; }
  .rev-row { grid-template-columns:110px 1fr 60px; gap:8px; font-size:12px; }
}