/* 九洲体育 - SMART SPORTS VENUE × ARCHITECTURAL TECHNOLOGY
   主色：深海军蓝 / 建筑灰 / 碳黑 / 冰白 / 草地绿(少量) / 科技青 / 赛事橙(少量) / 警告红(少量)
   风格定位：体育场馆科技公司官网，建筑剖面与系统栈叙事，非游戏厅霓虹风，非普通企业蓝 */

:root {
  --carbon: #14161c;
  --navy-950: #0a1420;
  --navy-900: #0f1e30;
  --navy-800: #152a42;
  --navy-700: #1c3752;
  --arch-gray: #6b7280;
  --arch-gray-light: #eceef1;
  --cyan: #2aa9c4;
  --cyan-dim: #0d3a42;
  --grass: #4a9d5f;
  --orange: #e0722c;
  --red: #d84c42;
  --ice: #f6f7f5;
  --ink-900: #12161d;
  --ink-700: #3b4250;
  --ink-500: #636b7a;
  --ink-300: #99a0ac;
  --line: #e1e4e8;
  --line-soft: #edeff2;
  --card: #ffffff;
  --bg: #f4f5f3;
  --maxw: 1260px;
  --radius: 10px;
  --mono: "SFMono-Regular", "JetBrains Mono", Consolas, "Courier New", monospace;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", "Segoe UI", Arial, sans-serif;
  color: var(--ink-900);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; }
ul, ol { padding-left: 1.3em; }
h1, h2, h3, h4 { color: var(--ink-900); line-height: 1.4; font-weight: 700; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.mono { font-family: var(--mono); letter-spacing: .5px; }

.topbar { background: var(--carbon); color: #9aa0ac; font-size: 12.5px; }
.topbar .wrap { display: flex; justify-content: space-between; align-items: center; height: 32px; }
.topbar a { color: #9aa0ac; margin-left: 16px; }
.topbar a:hover { color: var(--cyan); }

.site-header { background: var(--navy-950); border-bottom: 2px solid var(--cyan); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand-mark {
  width: 38px; height: 38px; border-radius: 8px;
  background: linear-gradient(155deg, var(--cyan), var(--grass));
  display: flex; align-items: center; justify-content: center;
  color: #06131a; font-weight: 800; font-size: 14px; flex-shrink: 0;
}
.brand-text { color: #fff; font-size: 19px; font-weight: 700; letter-spacing: .5px; }
.brand-text small { display: block; font-size: 10.5px; color: var(--cyan); font-weight: 400; letter-spacing: 1.5px; font-family: var(--mono); }
.main-nav { display: flex; align-items: center; gap: 2px; flex-wrap: wrap; }
.main-nav a { color: #c3cad4; font-size: 13.5px; padding: 10px 11px; border-radius: 6px; }
.main-nav a:hover, .main-nav a.active { background: rgba(42,169,196,.12); color: #fff; text-decoration: none; }
.main-nav a.active { box-shadow: inset 0 -2px 0 var(--cyan); }

.crumbs { background: var(--card); border-bottom: 1px solid var(--line); }
.crumbs .wrap { padding: 10px 20px; font-size: 13px; color: var(--ink-500); }
.crumbs a { color: var(--ink-500); }
.crumbs a:hover { color: var(--cyan); }
.crumbs span.sep { margin: 0 6px; color: var(--ink-300); }
.crumbs span.cur { color: var(--ink-700); }

.hero { background: radial-gradient(ellipse at 30% 0%, #16283e 0%, var(--navy-950) 62%); color: #eceef1; padding: 0 0 6px; overflow: hidden; }
.hero-inner { max-width: var(--maxw); margin: 0 auto; padding: 36px 20px 10px; }
.hero-copy .kicker { font-family: var(--mono); color: var(--cyan); font-size: 12.5px; letter-spacing: 2px; margin-bottom: 12px; text-transform: uppercase; }
.hero-copy h1 { color: #fff; font-size: 27px; margin: 0 0 14px; line-height: 1.45; max-width: 900px; }
.hero-copy p { color: #b3bac4; font-size: 14.5px; margin: 0 0 18px; max-width: 760px; }
.hero-visual { margin-top: 10px; }
.hero-visual img { width: 100%; height: auto; border-radius: 6px; }

.page-head { background: linear-gradient(155deg, var(--navy-950), var(--navy-700)); border-bottom: 2px solid var(--cyan); padding: 30px 0 26px; }
.page-head .wrap { color: #eceef1; }
.page-head h1 { color: #fff; font-size: 24px; margin: 0 0 8px; }
.page-head p { margin: 0; color: #b3bac4; font-size: 14.5px; max-width: 820px; }
.page-head .kicker { font-family: var(--mono); color: var(--cyan); font-size: 12px; letter-spacing: 2px; margin-bottom: 8px; text-transform: uppercase; }

.btn { display: inline-flex; align-items: center; gap: 6px; background: var(--cyan); color: #06222a; padding: 10px 20px; border-radius: 6px; font-size: 14px; font-weight: 700; border: none; cursor: pointer; }
.btn:hover { background: #45c2dc; text-decoration: none; }
.btn.alt { background: var(--grass); color: #06220f; }
.btn.alt:hover { background: #5fb974; }
.btn.ghost { background: transparent; border: 1px solid rgba(255,255,255,.3); color: #fff; }
.btn.outline { background: transparent; border: 1px solid var(--line); color: var(--ink-700); }
.btn.outline:hover { border-color: var(--cyan); color: var(--cyan); }
.btn.sm { padding: 7px 14px; font-size: 13px; }
.btn-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 6px; }

.layout { display: grid; grid-template-columns: 1fr 300px; gap: 28px; padding: 30px 0 50px; align-items: start; }
.layout.single { grid-template-columns: 1fr; }
main.content { min-width: 0; }
.section { margin: 0 0 36px; }
.section:last-child { margin-bottom: 0; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 14px; border-bottom: 2px solid var(--line); padding-bottom: 10px; }
.section-head h2 { font-size: 19px; margin: 0; }
.section-head .tag-num { font-family: var(--mono); background: #e6f4f7; color: #0a6d80; font-size: 11px; padding: 2px 8px; border-radius: 4px; margin-right: 8px; }
.section-head .more { font-size: 13px; }
.section-intro { color: var(--ink-700); font-size: 14.5px; margin: 0 0 16px; }

article.prose { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px 36px; }
article.prose h1 { font-size: 25px; margin: 0 0 6px; }
article.prose h2 { font-size: 19px; margin: 28px 0 12px; padding-top: 16px; border-top: 1px solid var(--line-soft); }
article.prose h2:first-of-type { border-top: none; padding-top: 0; }
article.prose h3 { font-size: 16px; margin: 18px 0 8px; color: var(--navy-700); }
article.prose p { margin: 0 0 14px; color: var(--ink-700); }
article.prose ul, article.prose ol { color: var(--ink-700); margin: 0 0 14px; }
article.prose li { margin-bottom: 6px; }
article.prose table { width: 100%; border-collapse: collapse; margin: 0 0 18px; font-size: 13.5px; }
article.prose th, article.prose td { border: 1px solid var(--line); padding: 9px 12px; text-align: left; vertical-align: top; }
article.prose th { background: var(--arch-gray-light); color: var(--ink-900); }
article.prose blockquote { margin: 0 0 16px; padding: 12px 18px; background: var(--arch-gray-light); border-left: 3px solid var(--cyan); border-radius: 4px; color: var(--ink-700); font-size: 14.5px; }
.disclaimer { margin: 0 0 16px; padding: 12px 18px; background: #fdf1ee; border-left: 3px solid var(--orange); border-radius: 4px; color: var(--ink-700); font-size: 13.5px; }
.steps { counter-reset: step; list-style: none; padding: 0; margin: 0 0 16px; }
.steps li { counter-increment: step; position: relative; padding-left: 42px; margin-bottom: 14px; color: var(--ink-700); font-size: 14.5px; }
.steps li::before { content: counter(step); font-family: var(--mono); position: absolute; left: 0; top: 0; width: 26px; height: 26px; border-radius: 6px; background: var(--navy-700); color: var(--cyan); font-size: 12.5px; font-weight: 700; display: flex; align-items: center; justify-content: center; }
.meta-row { display: flex; gap: 14px; flex-wrap: wrap; color: var(--ink-500); font-size: 13px; margin: 10px 0 22px; padding-bottom: 18px; border-bottom: 1px solid var(--line-soft); }
.meta-row .tag { background: #e6f4f7; color: #0a6d80; padding: 2px 10px; border-radius: 20px; font-weight: 600; font-family: var(--mono); font-size: 12px; }

.grid { display: grid; gap: 18px; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; display: flex; flex-direction: column; gap: 8px; }
.card .icon { width: 36px; height: 36px; border-radius: 8px; background: var(--arch-gray-light); display: flex; align-items: center; justify-content: center; margin-bottom: 2px; }
.card .icon svg { width: 20px; height: 20px; }
.card .cat { font-family: var(--mono); font-size: 11.5px; color: var(--orange); font-weight: 700; letter-spacing: .5px; text-transform: uppercase; }
.card h3 { font-size: 15.5px; margin: 0; }
.card h3 a { color: var(--ink-900); }
.card p { font-size: 13.5px; color: var(--ink-500); margin: 0; flex: 1; }
.card .foot { font-size: 11.5px; color: var(--ink-300); display: flex; justify-content: space-between; margin-top: 6px; font-family: var(--mono); }

.list-row { display: flex; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--line-soft); }
.list-row:last-child { border-bottom: none; }
.list-row .num { font-family: var(--mono); color: var(--line); font-size: 24px; font-weight: 800; width: 40px; flex-shrink: 0; }
.list-row .body { flex: 1; }
.list-row h3 { font-size: 15.5px; margin: 0 0 5px; }
.list-row h3 a { color: var(--ink-900); }
.list-row p { font-size: 13.5px; color: var(--ink-500); margin: 0 0 6px; }
.list-row .foot { font-size: 12px; color: var(--ink-300); font-family: var(--mono); }
.list-row .foot .tag { color: var(--orange); font-weight: 600; margin-right: 10px; }
.list-row .src { color: var(--ink-300); font-size: 12px; margin-top: 4px; }

/* 诊断入口 / Troubleshooter */
.diag-nav { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.diag-item { display: flex; gap: 12px; align-items: flex-start; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; }
.diag-item .q { font-size: 14.5px; color: var(--ink-700); margin: 0 0 8px; line-height: 1.6; }
.diag-item .a a { font-size: 13.5px; font-weight: 700; color: var(--cyan); }
.diag-item .arrow { font-family: var(--mono); color: #0a6d80; font-size: 18px; flex-shrink: 0; }

/* Venue Stack 纵向技术栈 */
.venue-stack { display: flex; flex-direction: column; gap: 10px; }
.stack-layer { display: flex; gap: 16px; align-items: flex-start; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 20px; }
.stack-layer .ln { font-family: var(--mono); font-size: 22px; font-weight: 800; color: var(--line); width: 60px; flex-shrink: 0; }
.stack-layer h4 { margin: 0 0 6px; font-size: 15.5px; }
.stack-layer p { margin: 0; font-size: 13.5px; color: var(--ink-500); }
.stack-layer a.go { font-size: 12.5px; font-weight: 600; color: var(--cyan); }

/* 故障分层表 */
.fault-tree { display: flex; flex-direction: column; gap: 8px; }
.fault-layer { display: flex; gap: 14px; align-items: center; background: var(--navy-900); border-radius: 8px; padding: 12px 18px; color: #dbe1e8; }
.fault-layer .fn { font-family: var(--mono); font-size: 12px; color: var(--cyan); width: 90px; flex-shrink: 0; }
.fault-layer .fd { font-size: 13.5px; color: #c3cad4; }

.compare-table { width: 100%; border-collapse: collapse; font-size: 13.5px; margin: 0 0 18px; }
.compare-table th, .compare-table td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; }
.compare-table th { background: var(--navy-900); color: #fff; font-weight: 600; }
.compare-table tr:nth-child(even) td { background: #f7f8f7; }

.box { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; margin-bottom: 20px; }
.box h3 { font-size: 14.5px; margin: 0 0 12px; padding-bottom: 10px; border-bottom: 1px solid var(--line-soft); }
.box ul { list-style: none; margin: 0; padding: 0; }
.box li { margin-bottom: 10px; font-size: 13.5px; }
.box.cta { background: linear-gradient(155deg, var(--navy-900), var(--navy-700)); border: none; color: #dbe1e8; }
.box.cta h3 { color: #fff; border-color: rgba(255,255,255,.15); }
.box.cta p { font-size: 13px; color: #a3aab6; margin: 0 0 12px; }

.faq-item { border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; margin-bottom: 12px; background: var(--card); }
.faq-item h3 { font-size: 15px; margin: 0 0 8px; color: var(--navy-700); }
.faq-item p { font-size: 14px; color: var(--ink-700); margin: 0; }

.rel-links { background: var(--arch-gray-light); border-radius: var(--radius); padding: 18px 20px; margin: 22px 0; }
.rel-links h3 { font-size: 14.5px; margin: 0 0 10px; color: var(--navy-700); }
.rel-links ul { margin: 0; padding-left: 1.1em; }
.rel-links li { font-size: 13.5px; margin-bottom: 6px; }

.topic-intro { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 34px; margin-bottom: 30px; }
.topic-intro h2 { font-size: 18px; margin: 22px 0 10px; }
.topic-intro h2:first-child { margin-top: 0; }
.topic-intro p { color: var(--ink-700); margin: 0 0 12px; }

/* 场馆助手工具面板 */
.tool-panel { background: var(--navy-950); border-radius: var(--radius); padding: 24px; color: #dbe1e8; margin-bottom: 20px; }
.tool-panel .demo-tag { font-family: var(--mono); color: var(--cyan); font-size: 11.5px; letter-spacing: 2px; margin-bottom: 6px; text-transform: uppercase; }
.tool-panel h3 { color: #fff; margin: 0 0 6px; font-size: 18px; }
.tool-panel .demo-note { font-size: 12.5px; color: #939aa6; margin: 0 0 16px; }
.ai-chat { background: #0b1420; border: 1px solid #1f3348; border-radius: 8px; padding: 16px; min-height: 160px; max-height: 340px; overflow-y: auto; margin-bottom: 14px; font-size: 13.5px; }
.ai-chat .msg { margin-bottom: 12px; }
.ai-chat .msg .who { font-family: var(--mono); font-size: 11px; color: var(--cyan); margin-bottom: 3px; }
.ai-chat .msg.user .who { color: var(--orange); }
.ai-chat .msg p { margin: 0; color: #dbe1e8; }
.ai-chat .msg .links { margin-top: 6px; }
.ai-chat .msg .links a { color: var(--cyan); font-size: 12.5px; margin-right: 12px; }
.ai-input-row { display: flex; gap: 10px; flex-wrap: wrap; }
.ai-input-row input[type=text] { flex: 1; min-width: 180px; background: #0b1420; border: 1px solid #1f3348; border-radius: 6px; padding: 10px 12px; color: #fff; font-size: 13.5px; }
.ai-quick { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.ai-quick button { background: #101d2e; border: 1px solid #1f3348; color: #b3bac4; font-size: 12.5px; padding: 6px 12px; border-radius: 20px; cursor: pointer; }
.ai-quick button:hover { border-color: var(--cyan); color: var(--cyan); }

.small-note { font-size: 12.5px; color: var(--ink-300); }
.divider { height: 1px; background: var(--line); margin: 30px 0; }
.pill { display: inline-block; background: var(--arch-gray-light); color: var(--navy-700); font-size: 12px; padding: 3px 10px; border-radius: 20px; margin-right: 6px; font-family: var(--mono); }

.site-footer { background: var(--carbon); color: #9aa0ac; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 2fr repeat(4, 1fr); gap: 24px; padding: 40px 0 24px; }
.footer-grid h4 { color: #fff; font-size: 14px; margin: 0 0 14px; }
.footer-grid p { font-size: 12.5px; line-height: 1.8; color: #74798a; margin: 0 0 10px; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: 9px; font-size: 13px; }
.footer-grid a { color: #9aa0ac; }
.footer-grid a:hover { color: var(--cyan); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 16px 0; font-size: 12px; color: #5a5f6e; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }

@media (max-width: 980px) {
  .layout { grid-template-columns: 1fr; }
  .grid.cols-3, .grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
  .diag-nav { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .main-nav { display: none; }
  .grid.cols-3, .grid.cols-4, .grid.cols-2 { grid-template-columns: 1fr; }
  article.prose { padding: 22px 18px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stack-layer, .fault-layer { flex-direction: column; gap: 6px; }
}