/* ============ 设计令牌 ============ */
:root{
  --ink:#0f172a;
  --ink-2:#1e293b;
  --muted:#64748b;
  --muted-2:#94a3b8;
  --brand:#0f3d91;
  --brand-d:#0a2a66;
  --brand-l:#e8f0fb;
  --line:#e2e8f0;
  --soft:#f7f9fc;
  --soft-2:#eef2f7;
  --ok:#0f766e;
  --ok-l:#e6f6f3;
  --warn:#b45309;
  --warn-l:#fdf3e6;
  --bad:#b91c1c;
  --bad-l:#fdeaea;
  --radius:10px;
  --radius-s:7px;
  --shadow:0 1px 3px rgba(15,23,42,.06),0 6px 18px -10px rgba(15,23,42,.12);
  --shadow-l:0 4px 12px rgba(15,23,42,.08),0 20px 40px -20px rgba(15,23,42,.18);
  --max:1200px;
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--font);color:var(--ink);background:#fff;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
img{max-width:100%}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.32;margin:0 0 .6em;font-weight:700;letter-spacing:-.01em}
h1{font-size:clamp(24px,3.4vw,38px)}
h2{font-size:clamp(20px,2.2vw,25px)}
h3{font-size:17px}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.3em}
li{margin:.35em 0}
code{font-family:var(--mono);font-size:.9em;background:var(--soft-2);padding:.12em .4em;border-radius:5px}
hr{border:0;border-top:1px solid var(--line);margin:2em 0}
.wrap{max-width:var(--max);margin:0 auto;padding:0 22px}
.narrow{max-width:860px}
.center{text-align:center}
.muted{color:var(--muted)}
.small{font-size:13.5px}
.note{font-size:13.5px;color:var(--muted);background:var(--soft);border-left:3px solid var(--line);padding:10px 14px;border-radius:0 8px 8px 0}
.mini{font-size:12px;color:var(--muted-2)}

/* ============ 顶部导航 ============ */
.site-head{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line)}
.head-in{display:flex;align-items:center;gap:18px;height:70px}
.brand{display:flex;align-items:center;gap:11px;color:var(--ink);flex:none}
.brand:hover{text-decoration:none}
.brand-mark{width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--brand),#3b82f6);color:#fff;display:grid;place-items:center;font-weight:800;font-size:15px;letter-spacing:.5px;box-shadow:0 6px 16px -6px rgba(26,86,219,.55)}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{font-size:16px;letter-spacing:-.01em}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--muted)}
.nav{display:flex;gap:4px;margin-left:auto}
.nav a{padding:8px 11px;border-radius:8px;color:var(--ink-2);font-size:14.5px;font-weight:500}
.nav a:hover{background:var(--soft-2);text-decoration:none}
.nav a.on{color:var(--brand);background:var(--brand-l)}
.head-cta{display:flex;gap:8px;align-items:center}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;width:40px;height:38px;font-size:18px;cursor:pointer}

/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;background:var(--brand);color:#fff;
  padding:10px 18px;border-radius:10px;font-weight:600;font-size:14.5px;border:1px solid var(--brand);cursor:pointer;
  transition:.18s;white-space:nowrap}
.btn:hover{background:var(--brand-d);border-color:var(--brand-d);text-decoration:none;transform:translateY(-1px)}
.btn.ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn.ghost:hover{background:var(--soft);border-color:#cfd8e6;color:var(--brand)}
.btn.lg{padding:13px 26px;font-size:15.5px;border-radius:12px}
.btn.small{padding:7px 13px;font-size:13px;border-radius:8px}
.btn[disabled]{opacity:.5;cursor:not-allowed;transform:none}

/* ============ 面包屑 ============ */
.crumbs{max-width:var(--max);margin:0 auto;padding:14px 22px 0;font-size:13px;color:var(--muted)}
.crumbs a{color:var(--muted)}
.crumbs .sep{margin:0 7px;color:var(--muted-2)}

/* ============ 首页 hero ============ */
.hero{background:radial-gradient(1200px 500px at 12% -10%,#16326b 0%,#0b1b3a 45%,#070f21 100%);color:#fff;padding:72px 0 64px;position:relative;overflow:hidden}
.hero:before{content:"";position:absolute;inset:0;
  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:48px 48px;
  pointer-events:none}
.hero:after{content:"";position:absolute;inset:0;
  background-image:
    radial-gradient(circle at 10% 20%, rgba(96,165,250,.12) 1.5px, transparent 2px),
    radial-gradient(circle at 35% 60%, rgba(96,165,250,.1) 1.5px, transparent 2px),
    radial-gradient(circle at 70% 30%, rgba(96,165,250,.12) 1.5px, transparent 2px),
    radial-gradient(circle at 90% 75%, rgba(96,165,250,.08) 1.5px, transparent 2px),
    linear-gradient(45deg, transparent 49.5%, rgba(96,165,250,.06) 50%, transparent 50.5%),
    linear-gradient(-45deg, transparent 49.5%, rgba(96,165,250,.06) 50%, transparent 50.5%);
  background-size:220px 220px, 280px 280px, 240px 240px, 320px 320px, 220px 220px, 220px 220px;
  pointer-events:none}
.hero-in{display:grid;grid-template-columns:1.55fr .95fr;gap:44px;align-items:center;position:relative;z-index:1}
.hero-tag{display:inline-block;font-size:12.5px;letter-spacing:.04em;color:#bfd4ff;border:1px solid rgba(191,212,255,.3);
  background:rgba(59,130,246,.12);padding:5px 12px;border-radius:999px;margin-bottom:18px}
.hero h1{font-size:clamp(27px,4vw,46px);letter-spacing:-.02em;margin-bottom:16px}
.hero h1 .hl{background:linear-gradient(90deg,#60a5fa,#22d3ee);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:16.5px;color:#c7d3e8;max-width:620px;line-height:1.85}
.hero-sub strong{color:#fff}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin:26px 0 30px}
.hero-cta .btn.ghost{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.24)}
.hero-cta .btn.ghost:hover{background:rgba(255,255,255,.16);color:#fff}
.hero-stats{display:flex;gap:30px;list-style:none;padding:0;margin:0;flex-wrap:wrap}
.hero-stats li{display:flex;flex-direction:column}
.hero-stats b{font-size:26px;letter-spacing:-.02em;color:#fff}
.hero-stats span{font-size:12.5px;color:#93a5c4}
.hero-card{background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.14);border-radius:18px;padding:20px;backdrop-filter:blur(6px)}
.hc-head{font-size:12.5px;color:#9fb3d4;letter-spacing:.04em;margin-bottom:12px}
.hc-item{display:block;padding:12px 0;border-top:1px solid rgba(255,255,255,.1);color:#e6edf9}
.hc-item:hover{text-decoration:none}
.hc-item b{display:block;font-size:14.5px;margin-bottom:3px;color:#fff}
.hc-item span{font-size:12.5px;color:#93a5c4;line-height:1.6}
.hc-foot{display:block;margin-top:10px;font-size:13px;color:#7ea6ff}

/* ============ 区块 ============ */
.sec{padding:46px 0}
.sec.alt{background:var(--soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{text-align:center;max-width:760px;margin:0 auto 36px}
.sec-head h2{position:relative;padding-top:16px}
.sec-head h2:before{content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);width:44px;height:3px;background:var(--brand);border-radius:2px}
.sec-head.left{text-align:left;margin:0 0 18px}
.sec-head.left h2{padding-left:16px}
.sec-head.left h2:before{left:0;transform:none;top:4px}
.sec-head p{color:var(--muted);margin:0;margin-top:8px}
.page-head{padding:34px 0 6px}
.page-head.center{text-align:center}
.page-head h1{margin-bottom:10px}
.page-head .sub{color:var(--muted);font-size:15.5px;margin:0 0 8px}
.head-tags{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:14px}
.upd{font-size:12.5px;color:var(--muted-2)}
.flag{font-size:22px}
.tag{font-size:12px;color:var(--muted);background:var(--soft-2);padding:3px 9px;border-radius:999px}

/* ============ AI 答案块 ============ */
.answer{background:linear-gradient(180deg,#f0f6ff,#f8fbff);border:1px solid #cfe0ff;border-left:4px solid var(--brand);
  border-radius:var(--radius);padding:22px 24px;margin:22px 0;position:relative}
.answer-tag{font-size:11.5px;font-weight:700;letter-spacing:.06em;color:var(--brand);margin-bottom:8px;text-transform:uppercase}
.answer p{margin:0;font-size:16.5px;line-height:1.9;color:#16305c}

/* ============ 卡片 ============ */
.card{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 20px 18px;
  transition:.18s;color:inherit;box-shadow:var(--shadow)}
.card:hover{text-decoration:none;border-color:#c9d8f2;box-shadow:var(--shadow-l);transform:translateY(-2px)}
.card h3{margin:8px 0 6px;font-size:16.5px;color:var(--ink)}
.card p{margin:0;color:var(--muted);font-size:14px;line-height:1.72}
.card-top{display:flex;justify-content:space-between;align-items:center;gap:8px}
.card-desc{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{display:flex;gap:14px;margin-top:12px;font-size:12.5px;color:var(--muted-2);flex-wrap:wrap}
.gc-top{display:flex;align-items:baseline;gap:10px}
.gc-num{font-size:26px;font-weight:800;color:var(--brand);letter-spacing:-.03em}
.gc-name{font-size:11.5px;color:var(--muted-2);letter-spacing:.03em}
.gc-more{display:inline-block;margin-top:12px;font-size:13px;color:var(--brand);font-weight:600}
.badge{display:inline-block;font-size:11.5px;font-weight:600;color:var(--brand);background:var(--brand-l);padding:3px 9px;border-radius:6px}
.mtag{font-size:11.5px;font-weight:600;padding:3px 9px;border-radius:6px}
.mtag.hard{color:var(--bad);background:var(--bad-l)}
.mtag.soft{color:var(--warn);background:var(--warn-l)}
.grid{display:grid;gap:16px}
.grid.two{grid-template-columns:repeat(2,1fr)}
.grid.three{grid-template-columns:repeat(3,1fr)}
.pills{display:flex;gap:8px;flex-wrap:wrap}
.pill{display:inline-block;font-size:13px;padding:5px 12px;border-radius:999px;background:var(--soft-2);color:var(--ink-2);border:1px solid transparent}
a.pill:hover{background:var(--brand-l);color:var(--brand);border-color:#cfe0ff;text-decoration:none}

/* ============ 步骤 ============ */
.steps3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:26px}
.s3{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.s3n{display:inline-grid;place-items:center;width:32px;height:32px;border-radius:9px;background:var(--brand-l);color:var(--brand);font-weight:800;margin-bottom:12px}
.s3 h3{margin:0 0 6px;font-size:16px}
.s3 p{margin:0;color:var(--muted);font-size:14px}
ol.steps{list-style:none;padding:0;margin:0}
.step{display:flex;gap:16px;padding:16px 0;border-bottom:1px dashed var(--line)}
.step:last-child{border-bottom:0}
.step-no{flex:none;width:42px;height:42px;border-radius:12px;background:var(--brand-l);color:var(--brand);display:grid;place-items:center;font-weight:800;font-size:14px}
.step-b h3{margin:0 0 4px;font-size:16px}
.step-b p{margin:0;color:var(--ink-2);font-size:14.5px}

/* ============ 面板 ============ */
.panel{border-radius:var(--radius);padding:18px 20px;border:1px solid var(--line);background:#fff}
.panel h3{margin:0 0 8px;font-size:15.5px}
.panel p{margin:0;font-size:14.5px;color:var(--ink-2)}
.panel.warn{background:var(--warn-l);border-color:#f3d9b5}
.panel.warn h3{color:var(--warn)}
.panel.myth{background:var(--soft);margin-bottom:14px}
.myth-m{font-size:15px;color:var(--ink);margin-bottom:10px;line-height:1.7}
.myth-t{font-size:14.5px;color:var(--ink-2);line-height:1.8;border-top:1px dashed var(--line);padding-top:10px}
.myth-m .x,.myth-t .v{display:inline-block;font-size:11.5px;font-weight:700;padding:2px 7px;border-radius:5px;margin-right:8px;vertical-align:2px}
.myth-m .x{background:var(--bad-l);color:var(--bad)}
.myth-t .v{background:var(--ok-l);color:var(--ok)}
.panel.good{background:var(--ok-l);border-color:#c7e9e2}
.panel.good h3{color:var(--ok)}
.panel.bad{background:var(--bad-l);border-color:#f6d0d0}
.panel.bad h3{color:var(--bad)}

/* ============ 表格 ============ */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff;margin:0 0 1em}
table{width:100%;border-collapse:collapse;font-size:14.5px}
th,td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--soft);font-size:13px;color:var(--muted);font-weight:600;white-space:nowrap}
tr:last-child td{border-bottom:0}
tbody tr:hover{background:#fafcff}
table ul.tight{margin:0;padding-left:1.1em}
ul.tight li{margin:.1em 0;font-size:14px}
.matrix-table th:first-child{position:sticky;left:0;background:var(--soft);z-index:1;min-width:190px}
.matrix-table td{text-align:center;font-variant-numeric:tabular-nums}
.m-on{color:var(--brand);font-weight:700;background:#f5f9ff}
.m-off{color:var(--muted-2)}

.kv{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;margin-bottom:14px}
.kv-row{display:grid;grid-template-columns:150px 1fr;border-bottom:1px solid var(--line)}
.kv-row:last-child{border-bottom:0}
.kv-k{background:var(--soft);padding:12px 16px;font-size:13.5px;color:var(--muted);font-weight:600}
.kv-v{padding:12px 16px;font-size:14.5px}
.kv-v ul{margin:0}

/* ============ 列表 ============ */
.checklist,.crosslist{list-style:none;padding:0;margin:0 0 1em}
.checklist li{position:relative;padding-left:26px;font-size:14.8px;color:var(--ink-2)}
.checklist li:before{content:"";position:absolute;left:0;top:.62em;width:14px;height:8px;border-left:2px solid var(--ok);border-bottom:2px solid var(--ok);transform:rotate(-45deg)}
.crosslist li{position:relative;padding-left:26px;font-size:14.8px;color:var(--ink-2)}
.crosslist li:before{content:"×";position:absolute;left:4px;top:0;color:var(--bad);font-weight:800}
.artlist{list-style:none;padding:0;margin:0}
.artlist li{margin:0;border-bottom:1px solid var(--line)}
.artlist li:last-child{border-bottom:0}
.artlist a{display:block;padding:14px 0;color:inherit}
.artlist a:hover{text-decoration:none}
.artlist a:hover b{color:var(--brand)}
.artlist time{display:block;font-size:12px;color:var(--muted-2);margin-bottom:4px}
.artlist b{display:block;font-size:15.5px;margin-bottom:4px;transition:.15s}
.artlist span{display:block;font-size:13.5px;color:var(--muted);line-height:1.65}
.more{font-size:14px;font-weight:600;display:inline-block;margin-top:14px}
.cols2{display:grid;grid-template-columns:1fr 1fr;gap:44px}

/* ============ 引用块 ============ */
.cite{margin:38px 0 10px;background:#0e1726;color:#dbe6f7;border-radius:var(--radius);padding:22px 24px;position:relative;overflow:hidden}
.cite:before{content:"";position:absolute;right:-40px;top:-40px;width:160px;height:160px;border-radius:50%;background:radial-gradient(circle,rgba(59,130,246,.35),transparent 70%)}
.cite-head{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:10px}
.cite-head strong{color:#fff;font-size:15px}
.cite-head span{font-size:12px;color:#8fa6c9}
.cite-line{font-size:14.5px;line-height:1.8;color:#e8f0fb;margin:0 0 14px;position:relative;z-index:1}
.cite-actions{display:flex;gap:8px;flex-wrap:wrap;position:relative;z-index:1}
.cite-actions .btn{background:#1b4bc4;border-color:#1b4bc4}
.cite-actions .btn.ghost{background:transparent;border-color:#334870;color:#c6d6f0}
.cite-note{font-size:12px;color:#8fa6c9;margin:12px 0 0}

/* ============ CTA 条 ============ */
.cta-band{background:linear-gradient(135deg,#0f2a5e,#1a3f8f);color:#fff;border-radius:18px;padding:34px;text-align:center;margin:34px 0}
.cta-band h2{color:#fff}
.cta-band p{color:#c3d4f1;margin-bottom:20px}
.cta-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.cta-band .btn{background:#fff;color:var(--brand-d);border-color:#fff}
.cta-band .btn:hover{background:#eaf0fe}
.cta-band .btn.ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.4)}

/* ============ FAQ ============ */
.faq{margin:34px 0}
.qa-item{border:1px solid var(--line);border-radius:var(--radius-s);margin-bottom:10px;background:#fff}
.qa-item summary{cursor:pointer;padding:14px 18px;font-weight:600;font-size:15px;list-style:none;position:relative;padding-right:44px}
.qa-item summary::-webkit-details-marker{display:none}
.qa-item summary:after{content:"+";position:absolute;right:18px;top:12px;font-size:18px;color:var(--muted-2);font-weight:400}
.qa-item[open] summary:after{content:"−"}
.qa-item[open] summary{border-bottom:1px solid var(--line);color:var(--brand)}
.qa-a{padding:14px 18px}
.qa-a p{margin:0;font-size:14.6px;color:var(--ink-2);line-height:1.85}

/* ============ 正文排版 ============ */
.prose{font-size:16px;line-height:1.95;color:var(--ink-2)}
.prose h2{font-size:22px;margin:2em 0 .7em;padding-bottom:.4em;border-bottom:2px solid var(--soft-2);color:var(--ink)}
.prose h3{font-size:17.5px;margin:1.7em 0 .6em;color:var(--ink)}
.prose h4{font-size:16px;margin:1.4em 0 .5em}
.prose p{margin:0 0 1.1em}
.prose strong{color:var(--ink);font-weight:700}
.prose ul,.prose ol{margin:0 0 1.2em}
.prose li{margin:.5em 0}
.prose blockquote{margin:1.4em 0;padding:14px 18px;background:var(--soft);border-left:4px solid var(--brand);border-radius:0 10px 10px 0;color:var(--ink-2)}
.prose table{font-size:14px}
.prose .table-wrap{margin:1.2em 0 1.6em}

/* ============ 线索表单 ============ */
.lead-wrap{display:grid;grid-template-columns:1fr 1.05fr;gap:44px;align-items:start}
.lead-copy h2{font-size:26px}
.tick{list-style:none;padding:0;margin:16px 0}
.tick li{position:relative;padding-left:26px;color:var(--ink-2);font-size:14.8px}
.tick li:before{content:"";position:absolute;left:0;top:.62em;width:14px;height:8px;border-left:2px solid var(--ok);border-bottom:2px solid var(--ok);transform:rotate(-45deg)}
.lead-form{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:var(--shadow-l);display:grid;gap:14px}
.lf-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.lead-form label{display:block;font-size:13px;color:var(--muted);font-weight:600}
.lead-form input,.lead-form select,.lead-form textarea{
  width:100%;margin-top:6px;padding:11px 13px;border:1px solid var(--line);border-radius:9px;font-size:14.5px;
  font-family:inherit;color:var(--ink);background:#fff;transition:.15s}
.lead-form input:focus,.lead-form select:focus,.lead-form textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(26,86,219,.12)}
.form-note{font-size:12px;color:var(--muted-2);margin:0;text-align:center}
.form-note.ok{color:var(--ok);font-weight:600}
.form-note.err{color:var(--bad);font-weight:600}

/* ============ 自测 ============ */
.diag{max-width:960px;margin:0 auto}
.diag-step{display:flex;align-items:center;gap:12px;margin:32px 0 16px}
.ds-n{width:28px;height:28px;border-radius:8px;background:var(--ink);color:#fff;display:grid;place-items:center;font-size:13px;font-weight:700;flex:none}
.diag-step h2{margin:0;font-size:18px}
.dcats{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.dcat{display:flex;align-items:center;gap:9px;padding:12px 13px;border:1.5px solid var(--line);border-radius:11px;background:#fff;
  cursor:pointer;font-family:inherit;font-size:14px;color:var(--ink-2);text-align:left;transition:.15s}
.dcat:hover{border-color:#bcd0f2;background:#fafcff}
.dcat.on{border-color:var(--brand);background:var(--brand-l);color:var(--brand-d);font-weight:600}
.de{font-size:17px;line-height:1}
.dmkts{display:flex;gap:9px;flex-wrap:wrap}
.dmkt{padding:9px 16px;border:1.5px solid var(--line);border-radius:999px;background:#fff;cursor:pointer;
  font-family:inherit;font-size:14px;color:var(--ink-2);transition:.15s}
.dmkt:hover{border-color:#bcd0f2}
.dmkt.on{border-color:var(--brand);background:var(--brand);color:#fff;font-weight:600}
.diag-actions{display:flex;gap:10px;margin-top:24px}
.diag-result{margin-top:22px}
.dr-head{background:var(--soft);border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin-bottom:16px}
.dr-head h3{margin:0 0 4px;font-size:17px}
.dr-head p{margin:0;font-size:13.5px;color:var(--muted)}
.dr-group{margin-bottom:18px}
.dr-group h4{font-size:14px;color:var(--muted);letter-spacing:.03em;margin:0 0 10px;display:flex;align-items:center;gap:8px}
.dr-item{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:start;padding:13px 16px;border:1px solid var(--line);border-radius:10px;background:#fff;margin-bottom:8px}
.dr-item b{display:block;font-size:15px;margin-bottom:3px}
.dr-item b a{color:var(--ink)}
.dr-item b a:hover{color:var(--brand)}
.dr-item span{font-size:13.2px;color:var(--muted);line-height:1.6}
.dr-meta{text-align:right;font-size:12px;color:var(--muted-2);white-space:nowrap}
.dr-note{font-size:13.5px;color:var(--warn);background:var(--warn-l);border-radius:8px;padding:11px 14px;margin-bottom:10px}
.dr-empty{color:var(--muted);font-size:14px}

/* ============ AI 客服 ============ */
.chat-launcher{position:fixed;right:22px;bottom:22px;z-index:60;background:var(--ink);color:#fff;padding:12px 18px;border-radius:999px;
  font-size:14px;font-weight:600;cursor:pointer;box-shadow:0 12px 30px -10px rgba(14,23,38,.6);display:flex;align-items:center;gap:8px}
.chat-launcher:hover{background:#1b2942}
.chat-launcher .dot{width:8px;height:8px;border-radius:50%;background:#22d3ee;box-shadow:0 0 0 4px rgba(34,211,238,.25)}
.chat-panel{position:fixed;right:22px;bottom:22px;z-index:61;width:min(390px,calc(100vw - 32px));height:min(560px,calc(100vh - 44px));
  background:#fff;border-radius:18px;box-shadow:0 30px 70px -20px rgba(14,23,38,.45);display:flex;flex-direction:column;overflow:hidden;border:1px solid var(--line)}
.chat-panel[hidden]{display:none!important}
.chat-head{background:var(--ink);color:#fff;padding:14px 16px;display:flex;justify-content:space-between;align-items:flex-start;gap:10px}
.chat-head strong{display:block;font-size:14.5px}
.chat-head em{font-style:normal;font-size:11.5px;color:#93a5c4}
.chat-head button{background:none;border:0;color:#93a5c4;font-size:22px;cursor:pointer;line-height:1;padding:0 2px}
.chat-body{flex:1;overflow-y:auto;padding:16px;background:var(--soft);display:flex;flex-direction:column;gap:10px}
.msg{max-width:86%;padding:10px 13px;border-radius:13px;font-size:14px;line-height:1.7;white-space:pre-wrap;word-break:break-word}
.msg.bot{background:#fff;border:1px solid var(--line);align-self:flex-start;border-bottom-left-radius:4px}
.msg.me{background:var(--brand);color:#fff;align-self:flex-end;border-bottom-right-radius:4px}
.msg.sys{background:transparent;color:var(--muted-2);font-size:12px;align-self:center;text-align:center;max-width:100%}
.qr-card{margin-top:10px;padding:10px;background:var(--soft);border:1px solid var(--line);border-radius:12px;display:flex;flex-direction:column;align-items:center;gap:6px}
.qr-card img{display:block;width:168px;height:168px;border-radius:8px;background:#fff}
.qr-card em{font-style:normal;font-size:12px;color:var(--muted-2)}
.msg.qr-msg{display:flex;flex-direction:column;align-items:center;gap:8px;padding:12px}
.msg.qr-msg img{width:150px;height:150px;border-radius:8px;display:block}
.msg.qr-msg span{font-size:12px;color:var(--muted-2);text-align:center;white-space:normal}
.chat-form{display:flex;gap:8px;padding:12px;border-top:1px solid var(--line);background:#fff}
.chat-form input{flex:1;padding:10px 12px;border:1px solid var(--line);border-radius:9px;font-size:14px;font-family:inherit}
.chat-form input:focus{outline:none;border-color:var(--brand)}
.chat-form button{background:var(--brand);color:#fff;border:0;border-radius:9px;padding:0 16px;font-weight:600;cursor:pointer;font-size:14px}
.chat-foot{font-size:11px;color:var(--muted-2);text-align:center;padding:0 12px 10px;background:#fff}
.typing span{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--muted-2);margin-right:3px;animation:bl 1.2s infinite}
.typing span:nth-child(2){animation-delay:.2s}
.typing span:nth-child(3){animation-delay:.4s}
@keyframes bl{0%,60%,100%{opacity:.25}30%{opacity:1}}

/* ============ 页脚 ============ */
.site-foot{background:#0b1220;color:#9fb0c9;padding:52px 0 26px;font-size:14px;margin-top:10px}
.fgrid{display:grid;grid-template-columns:1.6fr repeat(4,1fr);gap:32px;padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.09)}
.fbrand .brand{margin-bottom:12px;color:#fff}
.fbrand .brand-mark{width:34px;height:34px;font-size:13px}
.fbrand strong{color:#fff}
.fbrand p{margin:0 0 10px;line-height:1.75;font-size:13.5px}
.fmeta{font-size:13px;color:#7f90a8}
.fmeta a{color:#b9c9e0}
.fcol h4{color:#fff;font-size:13px;margin:0 0 14px;letter-spacing:.02em}
.fcol a{display:block;color:#93a5c4;font-size:13.5px;padding:4px 0}
.fcol a:hover{color:#fff;text-decoration:none}
.fbottom{padding-top:22px;font-size:12.5px;line-height:1.8;color:#6b7c95}
.fbottom strong{color:#9fb0c9}
.fbottom a{color:#93a5c4}
.fbottom .muted{color:#5b6b82}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .hero-in{grid-template-columns:1fr;gap:32px}
  .dcats{grid-template-columns:repeat(3,1fr)}
  .fgrid{grid-template-columns:1fr 1fr 1fr}
  .grid.three{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:860px){
  .nav{display:none;position:absolute;top:70px;left:0;right:0;background:#fff;flex-direction:column;padding:10px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .nav.open{display:flex}
  .nav a{padding:11px 14px}
  .nav-toggle{display:block;margin-left:auto}
  .head-cta{display:none}
  .lead-wrap{grid-template-columns:1fr;gap:26px}
  .cols2{grid-template-columns:1fr;gap:30px}
  .grid.two,.grid.three,.steps3{grid-template-columns:1fr}
  .dcats{grid-template-columns:repeat(2,1fr)}
  .kv-row{grid-template-columns:1fr}
  .kv-k{padding-bottom:4px}
  .sec{padding:34px 0}
  .cta-band{padding:26px 20px}
  .chat-panel{right:12px;bottom:12px}
  .cite-actions{flex-direction:column;align-items:flex-start}
}
@media (max-width:560px){
  .lf-row{grid-template-columns:1fr}
  .hero{padding:44px 0 40px}
  .hero-stats{gap:20px}
  .hero-stats b{font-size:21px}
  .dcats{grid-template-columns:1fr}
  .fgrid{grid-template-columns:1fr 1fr}
  .dr-item{grid-template-columns:1fr}
  .dr-meta{text-align:left}
}
@media print{
  .site-head,.site-foot,.chat-launcher,.chat-panel,.cta-band,.crumbs{display:none}
  .diag-result .dr-item{break-inside:avoid}
}