/* ============ meiguoclaude.sinogenomics.com — 在腾讯云硅谷服务器跑 Claude Code 会不会被风控封号 ============ */
:root {
  --bg: #0a0f1c;
  --bg-grad-1: #0c1424;
  --bg-grad-2: #0a0f1c;
  --panel: #111a2e;
  --panel-2: #0e1626;
  --elev: #13203a;
  --border: #1e2c49;
  --border-soft: #182542;
  --text: #e6edf6;
  --muted: #93a3bd;
  --faint: #6b7c99;
  --accent: #34d399;     /* emerald — 「安全/结论」主强调 */
  --accent-2: #818cf8;   /* indigo — 「Claude/AI」次强调、链接 */
  --warn: #f5b14a;
  --danger: #fb7185;
  --code-bg: #0a1120;
  --code-border: #1b2740;
  --code-text: #cdd9ee;
  --shadow: 0 18px 50px -20px rgba(0,0,0,.65);
  --radius: 14px;
  --maxw: 1180px;
  --topbar-h: 58px;
  --mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", Roboto, Helvetica, Arial, sans-serif;
}
[data-theme="light"] {
  --bg: #f6f8fc;
  --bg-grad-1: #eef3fb;
  --bg-grad-2: #f6f8fc;
  --panel: #ffffff;
  --panel-2: #f4f7fc;
  --elev: #ffffff;
  --border: #e2e8f2;
  --border-soft: #eaeff7;
  --text: #0f1b2e;
  --muted: #51607a;
  --faint: #7f8da6;
  --accent: #0d9f6e;
  --accent-2: #4f46e5;
  --warn: #b87514;
  --danger: #d6435c;
  --code-bg: #0c1424;        /* 代码块两种模式都保持深色终端感 */
  --code-border: #1b2740;
  --code-text: #cdd9ee;
  --shadow: 0 16px 40px -24px rgba(20,40,80,.35);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(900px 480px at 78% -8%, rgba(129,140,248,.13), transparent 60%),
    radial-gradient(820px 460px at 8% 0%, rgba(52,211,153,.10), transparent 55%),
    linear-gradient(180deg, var(--bg-grad-1), var(--bg-grad-2));
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }
code, pre, kbd { font-family: var(--mono); }

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  height: var(--topbar-h);
  display: flex; align-items: center; gap: 14px;
  padding: 0 20px;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-soft);
}
.brand { display: flex; align-items: center; gap: 11px; font-weight: 700; letter-spacing: .2px; }
.brand img { width: 28px; height: 28px; display: block; }
.brand .b-name { font-size: 15px; }
.brand .b-dom { font-family: var(--mono); font-size: 12px; color: var(--muted); font-weight: 500; }
.topbar .spacer { flex: 1; }
.topbar .tnav { display: flex; gap: 4px; }
.topbar .tnav a {
  color: var(--muted); font-size: 13.5px; padding: 6px 11px; border-radius: 8px;
}
.topbar .tnav a:hover { color: var(--text); background: var(--panel); text-decoration: none; }
.icon-btn {
  display: inline-grid; place-items: center;
  width: 38px; height: 38px; border-radius: 9px;
  background: var(--panel); border: 1px solid var(--border);
  color: var(--muted); cursor: pointer; transition: .15s;
}
.icon-btn:hover { color: var(--text); border-color: var(--accent); }
.icon-btn svg { width: 18px; height: 18px; }
#navToggle { display: none; }

/* ---------- 布局 ---------- */
.layout {
  max-width: var(--maxw); margin: 0 auto;
  display: grid; grid-template-columns: 256px minmax(0, 1fr);
  gap: 40px; padding: 0 24px;
}
/* 侧栏目录 */
.sidebar { position: sticky; top: var(--topbar-h); align-self: start; height: calc(100vh - var(--topbar-h)); overflow-y: auto; padding: 30px 6px 40px; }
.toc-title { font-size: 11px; text-transform: uppercase; letter-spacing: .14em; color: var(--faint); margin: 0 10px 12px; }
.toc { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--border); }
.toc a {
  display: block; color: var(--muted); font-size: 13.5px; line-height: 1.4;
  padding: 7px 12px; margin-left: -1px; border-left: 2px solid transparent;
}
.toc a:hover { color: var(--text); text-decoration: none; }
.toc a.active { color: var(--accent); border-left-color: var(--accent); font-weight: 600; background: linear-gradient(90deg, color-mix(in srgb, var(--accent) 9%, transparent), transparent); }
.toc .sub a { padding-left: 26px; font-size: 12.5px; }

main { padding: 30px 0 90px; min-width: 0; }

/* ---------- Hero ---------- */
.hero { padding: 26px 0 14px; border-bottom: 1px solid var(--border-soft); margin-bottom: 14px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; font-size: 12.5px; font-weight: 600;
  color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  padding: 5px 12px; border-radius: 999px; margin-bottom: 18px;
}
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 22%, transparent); }
.hero h1 { font-size: clamp(27px, 4vw, 40px); line-height: 1.16; margin: 0 0 14px; letter-spacing: -.01em; font-weight: 800; }
.hero h1 .grad { background: linear-gradient(92deg, var(--accent-2), var(--accent)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .lede { font-size: 17.5px; color: var(--muted); max-width: 60ch; margin: 0 0 22px; }
.chips { display: flex; flex-wrap: wrap; gap: 9px; }
.chip {
  font-size: 12.5px; font-family: var(--mono); color: var(--text);
  background: var(--panel); border: 1px solid var(--border);
  padding: 6px 12px; border-radius: 8px;
}
.chip.em { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 38%, transparent); }
.chip.sky { color: var(--accent-2); border-color: color-mix(in srgb, var(--accent-2) 38%, transparent); }

/* 三条硬性要求条 */
.req-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 26px 0 6px; }
.req-row .req {
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
  padding: 16px 16px 15px; position: relative; overflow: hidden;
}
.req-row .req::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: linear-gradient(var(--accent), var(--accent-2)); }
.req .n { font-family: var(--mono); font-size: 12px; color: var(--faint); }
.req .t { font-weight: 700; font-size: 14.5px; margin: 3px 0 5px; }
.req .d { font-size: 13px; color: var(--muted); line-height: 1.55; }

/* ---------- 章节通用 ---------- */
section.block { padding: 38px 0 8px; scroll-margin-top: calc(var(--topbar-h) + 14px); }
section.block > h2 {
  font-size: 23px; font-weight: 800; letter-spacing: -.01em; margin: 0 0 6px;
  display: flex; align-items: baseline; gap: 12px;
}
section.block > h2 .num { font-family: var(--mono); font-size: 14px; color: var(--accent); font-weight: 600; }
section.block > .sec-lede { color: var(--muted); margin: 0 0 22px; font-size: 15.5px; max-width: 70ch; }
h3 { font-size: 17px; font-weight: 700; margin: 30px 0 10px; }
h3 .tag { font-family: var(--mono); font-size: 12px; font-weight: 600; color: var(--accent-2); background: color-mix(in srgb, var(--accent-2) 12%, transparent); padding: 2px 8px; border-radius: 6px; margin-left: 8px; vertical-align: middle; }
p { margin: 12px 0; }
.muted { color: var(--muted); }
strong { color: var(--text); font-weight: 700; }
section.block ul, section.block ol { padding-left: 22px; margin: 12px 0; }
section.block li { margin: 7px 0; }
section.block li::marker { color: var(--accent); }
hr.soft { border: none; border-top: 1px solid var(--border-soft); margin: 34px 0; }

/* 行内 code */
:not(pre) > code {
  font-size: .86em; background: var(--panel); border: 1px solid var(--border);
  color: var(--text); padding: 1.5px 6px; border-radius: 6px; overflow-wrap: anywhere;
}

/* ---------- 卡片网格(需求 / 环境) ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin: 18px 0; }
.card {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border); border-radius: 13px; padding: 18px 18px 16px;
  box-shadow: var(--shadow);
}
.card .ico { width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center; background: color-mix(in srgb, var(--accent-2) 14%, transparent); color: var(--accent-2); margin-bottom: 11px; }
.card .ico svg { width: 19px; height: 19px; }
.card h4 { margin: 0 0 7px; font-size: 15.5px; }
.card p { margin: 0; font-size: 13.5px; color: var(--muted); line-height: 1.6; }
.card .meta { margin-top: 10px; font-family: var(--mono); font-size: 11.5px; color: var(--faint); }

/* ---------- 架构图 ---------- */
.figure { margin: 20px 0 8px; background: linear-gradient(180deg, var(--panel), var(--panel-2)); border: 1px solid var(--border); border-radius: 14px; padding: 22px 18px 14px; box-shadow: var(--shadow); }
.figure svg { width: 100%; height: auto; display: block; }
.figure figcaption { color: var(--muted); font-size: 12.5px; text-align: center; margin-top: 10px; padding-top: 12px; border-top: 1px dashed var(--border); }
.figure figcaption b { color: var(--text); }
/* SVG 主题化 */
.d-node { fill: var(--elev); stroke: var(--border); stroke-width: 1.5; }
.d-inner { fill: color-mix(in srgb, var(--accent-2) 7%, transparent); stroke: var(--accent-2); stroke-width: 1.4; stroke-dasharray: 5 4; }
.d-chip { fill: color-mix(in srgb, var(--accent) 14%, transparent); stroke: var(--accent); stroke-width: 1.4; }
.d-end { fill: color-mix(in srgb, var(--accent) 9%, transparent); stroke: var(--accent); stroke-width: 1.6; }
.d-title { fill: var(--text); font-weight: 700; font-family: var(--sans); }
.d-text { fill: var(--text); font-family: var(--sans); }
.d-muted { fill: var(--muted); font-family: var(--sans); }
.d-accent { fill: var(--accent-2); font-family: var(--sans); font-weight: 600; }
.d-emer { fill: var(--accent); font-family: var(--sans); font-weight: 600; }
.d-mono { font-family: var(--mono); }
.d-flow { stroke: var(--accent-2); stroke-width: 2.4; fill: none; }
.d-flow2 { stroke: var(--accent); stroke-width: 2.4; fill: none; }
.d-thin { stroke: var(--muted); stroke-width: 1.6; fill: none; }

/* ---------- 表格 ---------- */
.tbl-wrap { overflow-x: auto; margin: 18px 0; border: 1px solid var(--border); border-radius: 12px; }
table { border-collapse: collapse; width: 100%; font-size: 14px; min-width: 520px; }
thead th { background: var(--panel); text-align: left; font-weight: 700; color: var(--text); padding: 12px 16px; border-bottom: 1px solid var(--border); font-size: 13px; }
tbody td { padding: 12px 16px; border-bottom: 1px solid var(--border-soft); color: var(--muted); vertical-align: top; }
tbody tr:last-child td { border-bottom: none; }
tbody td:first-child { color: var(--text); font-weight: 600; white-space: nowrap; }
tbody tr:hover td { background: color-mix(in srgb, var(--accent) 4%, transparent); }
table code { white-space: nowrap; }

/* ---------- 代码块 ---------- */
figure.code { margin: 16px 0; border: 1px solid var(--code-border); border-radius: 12px; overflow: hidden; background: var(--code-bg); box-shadow: var(--shadow); }
figure.code figcaption {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px 9px 14px; background: #0d1730; border-bottom: 1px solid var(--code-border);
}
figure.code .fname { font-family: var(--mono); font-size: 12.5px; color: #aebfdc; }
figure.code .lang { font-size: 11px; font-family: var(--mono); color: #aab2f5; background: rgba(129,140,248,.14); border: 1px solid rgba(129,140,248,.28); padding: 1px 8px; border-radius: 999px; }
figure.code .cf-spacer { flex: 1; }
figure.code .copy {
  font-family: var(--sans); font-size: 12px; color: #aebfdc; cursor: pointer;
  background: rgba(255,255,255,.04); border: 1px solid var(--code-border); border-radius: 7px; padding: 4px 10px; transition: .15s;
  display: inline-flex; align-items: center; gap: 5px;
}
figure.code .copy:hover { color: #fff; border-color: var(--accent); }
figure.code .copy.done { color: var(--accent); border-color: var(--accent); }
figure.code pre { margin: 0; padding: 15px 16px; overflow-x: auto; }
figure.code code { color: var(--code-text); font-size: 13px; line-height: 1.7; display: block; white-space: pre; }
figure.code .c-cmt { color: #62789c; font-style: italic; }

/* ---------- 告警 / 提示框 ---------- */
.callout { display: flex; gap: 13px; padding: 15px 17px; border-radius: 12px; margin: 18px 0; border: 1px solid var(--border); background: var(--panel); }
.callout .ci { flex: 0 0 auto; width: 22px; height: 22px; margin-top: 1px; }
.callout .ci svg { width: 22px; height: 22px; }
.callout .cc { min-width: 0; }
.callout .cc > :first-child { margin-top: 0; }
.callout .cc > :last-child { margin-bottom: 0; }
.callout .ct { font-weight: 700; font-size: 14px; margin-bottom: 3px; }
.callout p, .callout li { font-size: 13.5px; }
.callout.key { border-color: color-mix(in srgb, var(--accent) 40%, transparent); background: color-mix(in srgb, var(--accent) 8%, var(--panel)); }
.callout.key .ci, .callout.key .ct { color: var(--accent); }
.callout.info { border-color: color-mix(in srgb, var(--accent-2) 40%, transparent); background: color-mix(in srgb, var(--accent-2) 8%, var(--panel)); }
.callout.info .ci, .callout.info .ct { color: var(--accent-2); }
.callout.warn { border-color: color-mix(in srgb, var(--warn) 42%, transparent); background: color-mix(in srgb, var(--warn) 9%, var(--panel)); }
.callout.warn .ci, .callout.warn .ct { color: var(--warn); }
.callout.danger { border-color: color-mix(in srgb, var(--danger) 42%, transparent); background: color-mix(in srgb, var(--danger) 9%, var(--panel)); }
.callout.danger .ci, .callout.danger .ct { color: var(--danger); }

/* 步骤编号标题 */
.step { display: flex; align-items: center; gap: 11px; margin: 30px 0 8px; }
.step .sn { flex: 0 0 auto; width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center; font-family: var(--mono); font-size: 13px; font-weight: 700; color: var(--bg); background: linear-gradient(135deg, var(--accent-2), var(--accent)); }
[data-theme="light"] .step .sn { color: #fff; }
.step h3 { margin: 0; }

/* 取舍 / 对比两栏 */
.cmp { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 18px 0; }
.cmp .col { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 16px 18px; }
.cmp .col h4 { margin: 0 0 4px; font-size: 15px; }
.cmp .col .badge { font-size: 11.5px; font-family: var(--mono); padding: 2px 9px; border-radius: 999px; display: inline-block; margin-bottom: 10px; }
.cmp .col.rec .badge { color: var(--accent); background: color-mix(in srgb, var(--accent) 14%, transparent); border: 1px solid color-mix(in srgb, var(--accent) 32%, transparent); }
.cmp .col.alt .badge { color: var(--accent-2); background: color-mix(in srgb, var(--accent-2) 14%, transparent); border: 1px solid color-mix(in srgb, var(--accent-2) 32%, transparent); }
.cmp ul { margin: 6px 0 0; padding-left: 18px; }
.cmp li { font-size: 13px; color: var(--muted); }
.pro::marker { content: "✓ "; }
.con::marker { content: "✕ "; }
.cmp li.pro { color: var(--text); }
.cmp li.pro::marker { color: var(--accent); }
.cmp li.con::marker { color: var(--danger); }

/* ---------- 页脚 ---------- */
footer.foot { border-top: 1px solid var(--border-soft); margin-top: 50px; padding: 30px 0 60px; color: var(--faint); font-size: 13px; }
footer.foot .layout-inner { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; display: flex; flex-wrap: wrap; gap: 14px; align-items: center; justify-content: space-between; }
footer.foot a { color: var(--muted); }
footer.foot .dom { font-family: var(--mono); }

/* ---------- 响应式 ---------- */
@media (max-width: 920px) {
  .layout { grid-template-columns: 1fr; gap: 0; }
  .sidebar {
    position: fixed; top: var(--topbar-h); left: 0; bottom: 0; width: 280px; height: auto;
    background: var(--bg); border-right: 1px solid var(--border); padding: 22px 14px 40px;
    transform: translateX(-105%); transition: transform .25s ease; z-index: 45; box-shadow: var(--shadow);
  }
  body.nav-open .sidebar { transform: translateX(0); }
  .nav-scrim { position: fixed; inset: var(--topbar-h) 0 0 0; background: rgba(3,7,15,.55); opacity: 0; pointer-events: none; transition: .25s; z-index: 44; }
  body.nav-open .nav-scrim { opacity: 1; pointer-events: auto; }
  #navToggle { display: inline-grid; }
  .topbar .tnav { display: none; }
  .req-row { grid-template-columns: 1fr; }
  .cmp { grid-template-columns: 1fr; }
  main { padding: 22px 0 70px; }
}
@media (min-width: 921px) { .nav-scrim { display: none; } }
@media (max-width: 540px) {
  body { font-size: 15px; }
  .brand .b-dom { display: none; }
  .hero h1 { font-size: 26px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }