:root{
  --navy-900:#050b1e;--navy-800:#0a1633;--navy-700:#10265c;
  --blue-600:#1e5eff;--blue-500:#2f7bff;--cyan-400:#38d6ff;
  --ink:#16233b;--ink-soft:#4c5a72;--ink-mute:#6b7a93;
  --paper:#f3f6fc;--card:#ffffff;--line:#e3e9f4;--line-soft:#eef2fa;
  --green:#0d9f6e;--green-bg:#e8f8f1;--amber:#b45309;--amber-bg:#fff7e6;--red:#e11d48;--red-bg:#fdeef1;
  --radius:16px;--radius-sm:10px;
  --shadow:0 10px 30px rgba(16,38,92,.10),0 2px 8px rgba(16,38,92,.06);
  --shadow-lg:0 24px 60px rgba(5,11,30,.28);
  --font-body:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC","HarmonyOS Sans SC",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","Cascadia Mono",Consolas,"Courier New",monospace;
  --nav-h:56px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 16px);-webkit-text-size-adjust:100%}
body{font-family:var(--font-body);color:var(--ink);background:var(--paper);line-height:1.75;font-size:15.5px;
  background-image:radial-gradient(1200px 600px at 85% -10%,rgba(47,123,255,.10),transparent 60%),radial-gradient(900px 500px at -10% 30%,rgba(56,214,255,.08),transparent 55%)}
::selection{background:rgba(47,123,255,.22)}
a{color:var(--blue-600);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
button{font-family:inherit}

/* ---------- 顶栏 ---------- */
.topnav{position:sticky;top:0;z-index:50;height:var(--nav-h);background:rgba(5,11,30,.92);backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(120,170,255,.18)}
.topnav .inner{max-width:1180px;margin:0 auto;height:100%;padding:0 20px;display:flex;align-items:center;gap:22px;overflow-x:auto;scrollbar-width:none}
.topnav .inner::-webkit-scrollbar{display:none}
.topnav .brand{color:#fff;font-weight:800;font-size:15px;letter-spacing:.04em;white-space:nowrap;display:flex;align-items:center;gap:8px}
.topnav .brand .dot{width:8px;height:8px;border-radius:50%;background:var(--cyan-400);box-shadow:0 0 10px var(--cyan-400);flex:none}
.topnav a.lnk{color:rgba(214,230,255,.78);font-size:13.5px;white-space:nowrap;padding:6px 2px;border-bottom:2px solid transparent}
.topnav a.lnk:hover{color:#fff;text-decoration:none}
.topnav a.lnk[aria-current="page"]{color:#fff;border-bottom-color:var(--cyan-400)}
.topnav .spacer{flex:1}
.topnav .tag{font-size:12px;color:var(--cyan-400);border:1px solid rgba(56,214,255,.4);border-radius:999px;padding:2px 10px;white-space:nowrap}
@media(max-width:760px){.topnav .tag{display:none}}

/* ---------- 首页 hero ---------- */
.hero{position:relative;overflow:hidden;color:#fff;padding:74px 24px 120px;
  background:radial-gradient(900px 480px at 78% -20%,rgba(56,214,255,.30),transparent 60%),radial-gradient(700px 420px at 8% 110%,rgba(30,94,255,.38),transparent 60%),linear-gradient(138deg,var(--navy-900) 0%,var(--navy-800) 34%,#0d2c6e 68%,#134a9e 100%)}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(120,170,255,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(120,170,255,.055) 1px,transparent 1px);
  background-size:44px 44px;
  -webkit-mask-image:radial-gradient(ellipse 80% 70% at 50% 30%,#000 40%,transparent 100%);
  mask-image:radial-gradient(ellipse 80% 70% at 50% 30%,#000 40%,transparent 100%)}
.hero-inner{position:relative;max-width:1000px;margin:0 auto;text-align:center}
.kicker{display:inline-flex;align-items:center;gap:9px;font-size:12.5px;letter-spacing:.24em;color:var(--cyan-400);
  padding:7px 18px;border:1px solid rgba(56,214,255,.35);border-radius:999px;background:rgba(56,214,255,.08)}
.kicker::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--cyan-400);box-shadow:0 0 12px var(--cyan-400)}
.hero h1{margin:24px auto 16px;font-size:clamp(30px,4.8vw,50px);font-weight:800;letter-spacing:.04em;line-height:1.28;
  background:linear-gradient(120deg,#fff 20%,#bfe3ff 55%,var(--cyan-400) 90%);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .facts{max-width:720px;margin:0 auto;color:rgba(226,238,255,.86);font-size:15.5px}
.badges{margin-top:26px;display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.badges span,.badges a{font-size:12.5px;color:rgba(222,236,255,.92);padding:6px 14px;border-radius:999px;
  border:1px solid rgba(150,190,255,.25);background:rgba(16,38,92,.42);white-space:nowrap}
.badges a:hover{color:#fff;text-decoration:none;border-color:rgba(56,214,255,.6)}

/* ---------- 内页页头 ---------- */
.pagehead{position:relative;overflow:hidden;color:#fff;padding:44px 24px 40px;
  background:linear-gradient(135deg,var(--navy-900),#0d2c6e 70%,#134a9e)}
.pagehead::before{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(120,170,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(120,170,255,.06) 1px,transparent 1px);background-size:40px 40px;
  -webkit-mask-image:linear-gradient(180deg,#000,transparent);mask-image:linear-gradient(180deg,#000,transparent)}
.pagehead .inner{position:relative;max-width:1180px;margin:0 auto}
.pagehead .crumb{font-size:12.5px;color:rgba(190,214,255,.8);letter-spacing:.04em}
.pagehead h1{margin-top:8px;font-size:clamp(24px,3.2vw,34px);font-weight:800;letter-spacing:.03em;line-height:1.3}
.pagehead .meta{margin-top:12px;display:flex;gap:9px;flex-wrap:wrap}
.pagehead .meta span{font-size:12.5px;color:rgba(222,236,255,.9);padding:4px 12px;border-radius:999px;border:1px solid rgba(150,190,255,.24);background:rgba(16,38,92,.35)}

/* ---------- 布局 ---------- */
.wrap{max-width:1180px;margin:0 auto;padding:0 20px 72px}
.wrap.pull{margin-top:-64px;position:relative;z-index:2}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
@media(max-width:960px){.cards{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.cards{grid-template-columns:1fr}}
.card{position:relative;display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 24px 24px;text-decoration:none;color:inherit;box-shadow:var(--shadow);overflow:hidden;
  transition:transform .3s cubic-bezier(.2,.8,.3,1),box-shadow .3s ease}
.card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--blue-600),var(--cyan-400));
  transform:scaleX(0);transform-origin:left;transition:transform .4s cubic-bezier(.2,.8,.3,1)}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);text-decoration:none}
.card:hover::before{transform:scaleX(1)}
.card .num{font-size:12.5px;font-weight:700;letter-spacing:.26em;color:var(--blue-500)}
.card h2{margin:14px 0 8px;font-size:19px;font-weight:800;color:var(--navy-800);line-height:1.45}
.card p{flex:1;color:var(--ink-soft);font-size:14px}
.card .more{margin-top:18px;font-size:13.5px;font-weight:700;color:var(--blue-600)}
.card ul{margin:10px 0 0 18px;color:var(--ink-soft);font-size:13.5px}
.card li{margin:2px 0}

section.block{margin-top:44px;scroll-margin-top:calc(var(--nav-h) + 16px)}
section.block>h2{font-size:22px;font-weight:800;color:var(--navy-800);letter-spacing:.02em;padding-bottom:10px;border-bottom:2px solid var(--line)}
section.block>h2 .n{font-size:13px;color:var(--blue-500);font-weight:700;letter-spacing:.2em;margin-right:10px;vertical-align:2px}
h3{font-size:17px;font-weight:800;color:var(--navy-700);margin:26px 0 10px}
h4{font-size:15px;font-weight:800;color:var(--navy-700);margin:18px 0 8px}
p{margin:10px 0;color:var(--ink)}
ul,ol{margin:10px 0 10px 22px}
li{margin:5px 0}
.muted{color:var(--ink-mute);font-size:13.5px}
.small{font-size:13.5px}
.mono{font-family:var(--font-mono);font-size:13px}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media(max-width:800px){.grid2,.grid3{grid-template-columns:1fr}}

/* ---------- 面板 / 提示 ---------- */
.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px 22px 18px;box-shadow:0 4px 16px rgba(16,38,92,.05)}
.panel h3{margin-top:0}
.callout{border-left:4px solid var(--blue-500);background:#f6f9ff;border-radius:0 var(--radius-sm) var(--radius-sm) 0;padding:14px 18px;margin:16px 0;font-size:14.5px}
.callout.warn{border-left-color:var(--amber);background:var(--amber-bg)}
.callout.ok{border-left-color:var(--green);background:var(--green-bg)}
.callout.risk{border-left-color:var(--red);background:var(--red-bg)}
.callout strong{color:var(--navy-800)}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}
.chip{font-size:12.5px;padding:4px 11px;border-radius:999px;background:#eef3ff;color:var(--navy-700);border:1px solid #dbe6ff;white-space:nowrap}
.chip.ok{background:var(--green-bg);color:var(--green);border-color:#bfeada}
.chip.warn{background:var(--amber-bg);color:var(--amber);border-color:#f3d9a8}
.chip.risk{background:var(--red-bg);color:var(--red);border-color:#f6c9d3}
.chip.gray{background:#f1f4fa;color:var(--ink-soft);border-color:var(--line)}

/* ---------- 表格 ---------- */
.tablewrap{overflow-x:auto;margin:14px 0;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--card)}
table.data{width:100%;border-collapse:collapse;font-size:14px;min-width:560px}
table.data caption{caption-side:top;text-align:left;padding:12px 14px 0;color:var(--ink-mute);font-size:13px}
table.data th{background:#eef3fc;color:var(--navy-700);font-weight:800;text-align:left;padding:11px 13px;border-bottom:1px solid var(--line);white-space:nowrap}
table.data td{padding:10px 13px;border-bottom:1px solid var(--line-soft);vertical-align:top}
table.data tr:last-child td{border-bottom:none}
table.data tbody tr:hover{background:#fafcff}
table.data td.num,table.data th.num{text-align:right;font-variant-numeric:tabular-nums}

/* ---------- 目录 ---------- */
.toc{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;box-shadow:0 4px 16px rgba(16,38,92,.05);margin:20px 0}
.toc h2{margin:0 0 10px;font-size:14px;letter-spacing:.14em;color:var(--blue-500);font-weight:800}
.toc ol{margin:0 0 0 20px;columns:2;column-gap:28px}
@media(max-width:700px){.toc ol{columns:1}}
.toc li{font-size:14px;margin:3px 0;break-inside:avoid}

/* ---------- 文献 ---------- */
.toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin:16px 0;padding:14px 16px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius-sm)}
.toolbar input[type=search],.toolbar select{font-family:inherit;font-size:14px;padding:8px 12px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink)}
.toolbar input[type=search]{flex:1;min-width:200px}
.toolbar .count{font-size:13px;color:var(--ink-mute);margin-left:auto;white-space:nowrap}
.bib{list-style:none;margin:0;padding:0}
.bib li.bib-item{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-sm);padding:14px 16px;margin:10px 0}
.bib .t{font-weight:700;color:var(--navy-800);font-size:15px}
.bib .t a{color:var(--navy-800)}
.bib .t a:hover{color:var(--blue-600)}
.bib .a{color:var(--ink-soft);font-size:13.5px;margin-top:3px}
.bib .w{color:var(--ink-soft);font-size:13.5px;margin-top:6px}
.bib .why{color:var(--ink-soft);font-size:13.5px;margin-top:5px}
.bib .tags{margin-top:8px;display:flex;gap:6px;flex-wrap:wrap}
.tagx{font-size:11.5px;padding:2px 9px;border-radius:999px;background:#eef3ff;color:var(--blue-600);border:1px solid #dbe6ff}
.bib-empty{display:none;padding:22px;text-align:center;color:var(--ink-mute);background:var(--card);border:1px dashed var(--line);border-radius:var(--radius-sm)}

/* ---------- 代码 ---------- */
.codeblock{position:relative;margin:14px 0;background:#0b1730;border:1px solid #16264a;border-radius:var(--radius-sm);overflow:hidden}
.codeblock .bar{display:flex;align-items:center;gap:10px;padding:8px 12px;background:rgba(255,255,255,.04);border-bottom:1px solid rgba(120,170,255,.16)}
.codeblock .bar .name{font-size:12.5px;color:#9fbbee;font-family:var(--font-mono)}
.codeblock .bar .copy{margin-left:auto;font-size:12.5px;color:#9fbbee;background:transparent;border:1px solid rgba(150,190,255,.3);border-radius:6px;padding:3px 10px;cursor:pointer}
.codeblock .bar .copy:hover{color:#fff;border-color:var(--cyan-400)}
.codeblock pre{margin:0;padding:14px 16px;overflow-x:auto;color:#d9e6ff;font-family:var(--font-mono);font-size:13px;line-height:1.7}
.codeblock pre code{white-space:pre}
code.inline{font-family:var(--font-mono);font-size:13px;background:#eef3ff;color:var(--navy-700);padding:1px 6px;border-radius:5px;border:1px solid #dbe6ff}

/* ---------- 清单 ---------- */
.checklist{list-style:none;margin:14px 0;padding:0}
.checklist li{display:flex;gap:12px;align-items:flex-start;background:var(--card);border:1px solid var(--line);border-radius:var(--radius-sm);padding:12px 14px;margin:8px 0}
.checklist input[type=checkbox]{margin-top:6px;width:17px;height:17px;accent-color:var(--blue-600);flex:none}
.checklist label{cursor:pointer;font-size:14.5px}
.checklist .why{display:block;color:var(--ink-mute);font-size:13px;margin-top:3px}
.checklist li.done{opacity:.62}
.checklist li.done label{text-decoration:line-through}
.progress{display:flex;align-items:center;gap:12px;margin:14px 0}
.progress .bar{flex:1;height:8px;border-radius:999px;background:#e6edfa;overflow:hidden}
.progress .bar i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--blue-600),var(--cyan-400));transition:width .3s ease}
.progress .pct{font-size:13.5px;color:var(--ink-soft);font-variant-numeric:tabular-nums;white-space:nowrap}
.btn{font-size:13.5px;padding:6px 14px;border-radius:8px;border:1px solid var(--line);background:#fff;color:var(--navy-700);cursor:pointer}
.btn:hover{border-color:var(--blue-500);color:var(--blue-600)}

/* ---------- 时间线 / 步骤 ---------- */
.timeline{list-style:none;margin:16px 0;padding:0;position:relative}
.timeline::before{content:"";position:absolute;left:9px;top:6px;bottom:6px;width:2px;background:linear-gradient(180deg,var(--blue-500),var(--cyan-400))}
.timeline li{position:relative;padding:0 0 16px 34px}
.timeline li::before{content:"";position:absolute;left:3px;top:7px;width:12px;height:12px;border-radius:50%;background:#fff;border:3px solid var(--blue-500)}
.timeline li strong{display:block;color:var(--navy-800)}
.timeline li span{color:var(--ink-soft);font-size:14px}
.steps{counter-reset:s;list-style:none;margin:14px 0;padding:0}
.steps li{counter-increment:s;position:relative;padding:12px 16px 12px 52px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius-sm);margin:9px 0}
.steps li::before{content:counter(s);position:absolute;left:14px;top:12px;width:24px;height:24px;border-radius:7px;background:linear-gradient(135deg,var(--blue-600),var(--cyan-400));color:#fff;font-size:13px;font-weight:800;display:flex;align-items:center;justify-content:center}
.steps li strong{color:var(--navy-800)}

/* ---------- 页脚 ---------- */
footer.site{margin-top:56px;border-top:1px solid var(--line);background:linear-gradient(180deg,#eef2fa,#e7edf8);padding:28px 20px;color:var(--ink-soft);font-size:13.5px}
footer.site .inner{max-width:1180px;margin:0 auto;display:flex;gap:16px;flex-wrap:wrap;align-items:center;justify-content:space-between}
footer.site strong{color:var(--navy-700)}
footer.site .dot{margin:0 8px;color:#b6c2d8}
footer.site a{color:var(--navy-700)}

/* ---------- 回到顶部 ---------- */
#toTop{position:fixed;right:18px;bottom:18px;z-index:60;display:none;width:40px;height:40px;border-radius:50%;border:1px solid var(--line);
  background:#fff;color:var(--navy-700);box-shadow:var(--shadow);cursor:pointer;font-size:15px}
#toTop.show{display:block}

/* ---------- 打印 ---------- */
@media print{
  .topnav,#toTop,.toolbar,.btn,.codeblock .bar .copy{display:none!important}
  body{background:#fff;font-size:12pt}
  .hero,.pagehead{color:#000;background:#fff;padding:0 0 12px}
  .hero h1{color:#000;-webkit-text-fill-color:#000;background:none}
  .hero::before,.pagehead::before{display:none}
  .badges span,.pagehead .meta span{color:#333;border-color:#ccc;background:#f5f5f5}
  .card,.panel,.callout,table.data,.bib li.bib-item{box-shadow:none;break-inside:avoid}
  a{color:#000;text-decoration:underline}
  section.block{break-inside:auto}
}