:root {
  --geo-ink: #101828;
  --geo-muted: #526170;
  --geo-line: #d9e1e8;
  --geo-paper: #f6f8fa;
  --geo-surface: #ffffff;
  --geo-navy: #09233d;
  --geo-navy-2: #0e3457;
  --geo-blue: #1677d2;
  --geo-blue-dark: #095aab;
  --geo-cyan: #69d3df;
  --geo-good: #18794e;
  --geo-warn: #a15c00;
  --geo-danger: #b42318;
  --geo-radius: 18px;
  color: var(--geo-ink);
  background: var(--geo-paper);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", system-ui, sans-serif;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 86px; }
body { margin: 0; min-width: 320px; }
a { color: inherit; text-underline-offset: 3px; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid #f5bf4f; outline-offset: 3px; }
.geo-section[id] { scroll-margin-top: 86px; }
.geo-shell { width: min(1160px, calc(100% - 48px)); margin: 0 auto; }
.geo-skip { position: absolute; left: 12px; top: -48px; z-index: 20; padding: 10px 14px; border-radius: 8px; background: #fff; color: var(--geo-ink); font-weight: 700; }
.geo-skip:focus { top: 12px; }

.geo-topbar { color: #cfdae5; background: #061a2e; font-size: 13px; }
.geo-topbar .geo-shell { min-height: 33px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.geo-topbar a { color: #fff; }
.geo-header { position: sticky; top: 0; z-index: 10; border-bottom: 1px solid rgba(217,225,232,.78); background: rgba(255,255,255,.95); backdrop-filter: blur(14px); }
.geo-nav { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.geo-brand { display: inline-flex; align-items: center; gap: 10px; color: var(--geo-ink); font-size: 18px; font-weight: 800; text-decoration: none; white-space: nowrap; }
.geo-brand img { width: 30px; height: 30px; border-radius: 7px; }
.geo-links { display: flex; align-items: center; gap: 22px; }
.geo-links a { color: #3b4a59; font-size: 14px; text-decoration: none; }
.geo-links a:hover { color: var(--geo-blue); }
.geo-nav-tools { display: flex; align-items: center; gap: 10px; flex: none; }
.geo-console-entry { min-height: 40px; padding: 0 15px; display: inline-flex; align-items: center; border: 1px solid var(--geo-navy); border-radius: 9px; color: #fff; background: var(--geo-navy); font-size: 14px; font-weight: 800; text-decoration: none; white-space: nowrap; }
.geo-console-entry:hover { color: #fff; background: var(--geo-navy-2); }
.geo-nav-action { display: inline-flex; align-items: center; min-height: 38px; padding: 0 15px; border: 1px solid var(--geo-blue); border-radius: 8px; color: var(--geo-blue) !important; font-weight: 700; }
.geo-menu { display: none; border: 0; background: transparent; color: var(--geo-ink); font: inherit; font-weight: 700; cursor: pointer; }

.geo-hero { overflow: hidden; position: relative; color: #fff; background: radial-gradient(circle at 84% 12%, rgba(39,131,184,.38), transparent 28%), linear-gradient(123deg, #061a2e 0%, #0b3152 100%); }
.geo-hero::after { content: ""; position: absolute; width: 540px; height: 540px; right: -290px; bottom: -390px; border: 1px solid rgba(141,215,232,.32); border-radius: 50%; box-shadow: 0 0 0 55px rgba(141,215,232,.05), 0 0 0 110px rgba(141,215,232,.04); }
.geo-hero .geo-shell { position: relative; z-index: 1; min-height: 536px; padding: 74px 0 68px; display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(360px, .88fr); align-items: center; gap: 52px; }
.geo-eyebrow { margin: 0 0 19px; color: #8fd9ea; font-size: 12px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.geo-hero h1 { max-width: 670px; margin: 0; font-size: clamp(40px, 5vw, 61px); line-height: 1.13; letter-spacing: -.045em; }
.geo-hero h1 em { color: #9be4f1; font-style: normal; }
.geo-hero-lead { max-width: 610px; margin: 24px 0 0; color: #d2e0ec; font-size: 18px; line-height: 1.75; }
.geo-actions { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 12px; }
.geo-button { min-height: 46px; display: inline-flex; align-items: center; justify-content: center; padding: 0 19px; border: 1px solid transparent; border-radius: 9px; font-size: 15px; font-weight: 800; text-decoration: none; transition: transform .16s ease, background .16s ease; }
.geo-button:hover { transform: translateY(-1px); }
.geo-button.primary { color: #062038; background: #9be4f1; }
.geo-button.secondary { border-color: rgba(224,244,248,.48); color: #f3fbfd; background: rgba(5,27,47,.15); }
.geo-access-note { max-width: 670px; margin: 14px 0 0; color: #b9cedd; font-size: 13px; }
.geo-guardrail { margin: 20px 0 0; color: #a9c1d2; font-size: 13px; }
.geo-guardrail strong { color: #fff; }

.geo-scorecard { padding: 22px; border: 1px solid rgba(179,220,233,.42); border-radius: var(--geo-radius); background: rgba(2,20,36,.44); box-shadow: 0 20px 50px rgba(0,0,0,.18); }
.geo-card-label { margin: 0; color: #9be4f1; font-size: 12px; font-weight: 800; letter-spacing: .09em; }
.geo-scorecard h2 { margin: 12px 0 0; font-size: 24px; line-height: 1.3; }
.geo-status { display: inline-flex; align-items: center; gap: 7px; margin: 14px 0 0; padding: 5px 10px; border: 1px solid rgba(249,193,72,.5); border-radius: 999px; color: #ffd884; background: rgba(162,98,5,.2); font-size: 13px; font-weight: 700; }
.geo-status::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.geo-metrics { margin: 23px 0 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.geo-metrics > div { padding: 14px 12px; border-radius: 12px; background: rgba(255,255,255,.07); }
.geo-metrics strong { display: block; color: #fff; font-size: 28px; line-height: 1; }
.geo-metrics span { display: block; margin-top: 8px; color: #b6cad7; font-size: 12px; line-height: 1.35; }
.geo-scorecard-foot { margin: 18px 0 0; color: #bdceda; font-size: 13px; line-height: 1.65; }
.geo-scorecard-details { margin-top: 13px; border-top: 1px solid rgba(179,220,233,.22); }
.geo-scorecard-details summary { padding: 13px 0 0; color: #9be4f1; font-size: 13px; font-weight: 800; cursor: pointer; }
.geo-scorecard-details p { margin: 10px 0 0; color: #b8cbd8; font-size: 12px; line-height: 1.65; }

.geo-section { padding: 82px 0; }
.geo-section.alt { background: #edf3f7; }
.geo-section.dark { color: #eaf4fa; background: #09233d; }
.geo-section-head { max-width: 780px; margin-bottom: 42px; }
.geo-section-head .geo-eyebrow { color: var(--geo-blue); }
.geo-section.dark .geo-eyebrow { color: #87d9e8; }
.geo-section h2 { margin: 0; color: var(--geo-ink); font-size: clamp(31px, 4vw, 48px); line-height: 1.2; letter-spacing: -.035em; }
.geo-section.dark h2 { color: #fff; }
.geo-section-head > p:last-child { max-width: 700px; margin: 17px 0 0; color: var(--geo-muted); font-size: 16px; }
.geo-section.dark .geo-section-head > p:last-child { color: #c5d8e6; }

.geo-truth-grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(300px, .75fr); gap: 20px; }
.geo-truth { padding: 27px; border: 1px solid var(--geo-line); border-radius: var(--geo-radius); background: #fff; }
.geo-truth h3, .geo-method h3 { margin: 0; font-size: 21px; line-height: 1.4; }
.geo-truth p { margin: 12px 0 0; color: var(--geo-muted); }
.geo-truth-list { margin: 22px 0 0; padding: 0; list-style: none; }
.geo-truth-list li { padding: 12px 0; border-top: 1px solid var(--geo-line); color: #344454; }
.geo-truth-list b { color: var(--geo-ink); }
.geo-method { padding: 27px; border: 1px solid rgba(159,211,224,.3); border-radius: var(--geo-radius); background: #0d3559; }
.geo-method h3 { color: #fff; }
.geo-method p { margin: 12px 0 0; color: #c1d9e8; }
.geo-method ol { margin: 20px 0 0; padding-left: 21px; color: #deedf5; }
.geo-method li + li { margin-top: 9px; }

.geo-prompt-table-wrap {
  overflow-x: auto;
  border: 1px solid #cbd9e4;
  border-radius: var(--geo-radius);
  background: #fff;
  box-shadow: 0 10px 30px rgba(19, 47, 72, .06);
}
.geo-prompt-table { width: 100%; min-width: 760px; border-collapse: collapse; text-align: left; }
.geo-prompt-table th, .geo-prompt-table td { padding: 20px 22px; border-bottom: 1px solid #dce6ed; vertical-align: top; }
.geo-prompt-table th { color: #31566d; background: #eaf2f6; font-size: 12px; font-weight: 800; letter-spacing: .06em; }
.geo-prompt-table td { color: #344b5d; background: #fff; font-size: 15px; }
.geo-prompt-table tr:last-child td { border-bottom: 0; }
.geo-prompt-table .prompt { width: 47%; color: #172b3d; font-weight: 700; }
.geo-zero { color: #9a5600; font-weight: 800; }
.geo-evidence-note { margin: 20px 0 0; color: #536b7d; font-size: 14px; }
.geo-evidence-note a { color: #096ca8; font-weight: 700; }
.geo-outcome-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: -8px 0 28px; }
.geo-outcome-grid article { padding: 22px; border: 1px solid var(--geo-line); border-radius: 14px; background: #fff; }
.geo-outcome-grid span { color: var(--geo-blue); font-size: 12px; font-weight: 800; }
.geo-outcome-grid h3 { margin: 12px 0 6px; font-size: 19px; }
.geo-outcome-grid p { margin: 0; color: var(--geo-muted); font-size: 14px; }

.geo-loop { display: grid; grid-template-columns: repeat(5, 1fr); border-top: 2px solid var(--geo-ink); border-left: 1px solid var(--geo-line); }
.geo-loop article { min-height: 246px; padding: 24px 20px; border-right: 1px solid var(--geo-line); border-bottom: 1px solid var(--geo-line); color: #172b3d; background: #fff; }
.geo-loop span { color: var(--geo-blue); font-size: 12px; font-weight: 800; }
.geo-loop h3 { margin: 53px 0 10px; color: #172b3d; font-size: 19px; line-height: 1.35; }
.geo-loop p { margin: 0; color: #4f6272; font-size: 14px; }
.geo-section.dark .geo-loop { border-top-color: #75d5e3; border-left-color: #cad8e3; }
.geo-section.dark .geo-loop article { border-right-color: #d6e0e8; border-bottom-color: #d6e0e8; }
.geo-section.dark .geo-loop span { color: #0c65ad; }

.geo-service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.geo-service { padding: 28px; border: 1px solid var(--geo-line); border-radius: var(--geo-radius); background: #fff; }
.geo-service .geo-num { color: var(--geo-blue); font-size: 12px; font-weight: 800; }
.geo-service h3 { margin: 52px 0 11px; font-size: 23px; line-height: 1.35; }
.geo-service p { margin: 0; color: var(--geo-muted); }
.geo-service a { display: inline-block; margin-top: 23px; color: var(--geo-blue); font-size: 14px; font-weight: 800; }

.geo-product-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.geo-product { padding: 30px; border: 1px solid var(--geo-line); border-radius: var(--geo-radius); background: #fff; }
.geo-product.featured { color: #eaf4fa; border-color: #174e78; background: linear-gradient(135deg, #09233d, #10446d); }
.geo-product .geo-num { color: var(--geo-blue); font-size: 12px; font-weight: 800; letter-spacing: .04em; }
.geo-product.featured .geo-num { color: #88dbe8; }
.geo-product h3 { margin: 34px 0 12px; font-size: 25px; line-height: 1.35; }
.geo-product p, .geo-product li { color: var(--geo-muted); }
.geo-product.featured p, .geo-product.featured li { color: #c8dce8; }
.geo-product ul { margin: 22px 0 0; padding-left: 20px; }
.geo-product li + li { margin-top: 8px; }
.geo-capability-flow { display: flex; flex-wrap: wrap; align-items: center; gap: 9px; margin-top: 24px; }
.geo-capability-flow span { padding: 8px 10px; border: 1px solid rgba(151, 220, 234, .3); border-radius: 8px; color: #f1fbfd; background: rgba(255,255,255,.06); font-size: 13px; font-weight: 800; }
.geo-capability-flow b { color: #82d7e5; }
.geo-boundary { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 14px; margin-top: 20px; padding: 19px 22px; border-left: 4px solid var(--geo-warn); background: #fff7e8; }
.geo-boundary strong { color: #754500; }
.geo-boundary p { margin: 0; color: #624f32; }

.geo-principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.geo-principles article { padding: 25px; border-left: 2px solid #80d3e0; background: rgba(255,255,255,.06); }
.geo-principles h3 { margin: 0; color: #fff; font-size: 19px; }
.geo-principles p { margin: 10px 0 0; color: #c5d8e6; font-size: 14px; }

.geo-faq { border-top: 2px solid var(--geo-ink); }
.geo-faq details { border-bottom: 1px solid var(--geo-line); }
.geo-faq summary { position: relative; padding: 23px 45px 23px 0; color: var(--geo-ink); font-size: 18px; font-weight: 800; cursor: pointer; list-style: none; }
.geo-faq summary::-webkit-details-marker { display: none; }
.geo-faq summary::after { content: "+"; position: absolute; right: 8px; top: 17px; color: var(--geo-blue); font-size: 29px; font-weight: 400; }
.geo-faq details[open] summary::after { content: "−"; }
.geo-faq p { max-width: 800px; margin: -2px 0 22px; color: var(--geo-muted); }
.geo-cta { padding: 82px 0; color: #fff; background: linear-gradient(112deg, #061a2e, #0e365b); }
.geo-cta-inner { display: flex; justify-content: space-between; align-items: center; gap: 42px; }
.geo-cta h2 { max-width: 740px; margin: 0; color: #fff; font-size: clamp(31px, 4vw, 46px); line-height: 1.2; letter-spacing: -.035em; }
.geo-cta p { max-width: 740px; margin: 15px 0 0; color: #c9dce9; }
.geo-footer { padding: 35px 0; color: #93aabb; background: #051626; font-size: 13px; }
.geo-footer .geo-shell { display: flex; justify-content: space-between; gap: 20px; }
.geo-footer a { color: #d1e4ee; }

.geo-article-hero { padding: 68px 0 56px; color: #fff; background: linear-gradient(128deg, #061a2e, #124769); }
.geo-crumbs { margin-bottom: 24px; color: #b8d1df; font-size: 13px; }
.geo-crumbs a { color: #e7f7fb; }
.geo-article-hero h1 { max-width: 860px; margin: 0; font-size: clamp(34px, 5vw, 57px); line-height: 1.18; letter-spacing: -.04em; }
.geo-article-hero .intro { max-width: 780px; margin: 22px 0 0; color: #d2e2eb; font-size: 17px; line-height: 1.8; }
.geo-article-meta { margin: 22px 0 0; color: #b3cedc; font-size: 13px; }
.geo-article { max-width: 860px; padding-top: 64px; padding-bottom: 80px; }
.geo-article h2 { margin: 50px 0 15px; font-size: clamp(26px, 3vw, 34px); line-height: 1.3; letter-spacing: -.025em; }
.geo-article h2:first-child { margin-top: 0; }
.geo-article p, .geo-article li { color: #405160; }
.geo-article li + li { margin-top: 9px; }
.geo-article a { color: var(--geo-blue); font-weight: 700; }
.geo-callout { margin: 28px 0; padding: 22px 24px; border-left: 4px solid var(--geo-blue); border-radius: 0 12px 12px 0; background: #eaf4fa; }
.geo-callout strong { color: var(--geo-ink); }
.geo-evidence-list { margin: 24px 0; padding: 0; list-style: none; border: 1px solid var(--geo-line); border-radius: 13px; overflow: hidden; }
.geo-evidence-list li { padding: 16px 18px; border-bottom: 1px solid var(--geo-line); background: #fff; }
.geo-evidence-list li:last-child { border-bottom: 0; }
.geo-evidence-list b { color: var(--geo-ink); }
.geo-related { margin-top: 50px; padding-top: 32px; border-top: 1px solid var(--geo-line); }

@media (max-width: 960px) {
  .geo-hero .geo-shell { min-height: 0; grid-template-columns: 1fr; gap: 42px; padding: 73px 0 64px; }
  .geo-scorecard { max-width: 560px; }
  .geo-loop { grid-template-columns: repeat(3, 1fr); }
  .geo-loop article:nth-child(3) { border-right: 0; }
  .geo-loop article:nth-child(n + 4) { border-top: 1px solid var(--geo-line); }
  .geo-service-grid, .geo-principles, .geo-product-grid, .geo-outcome-grid { grid-template-columns: 1fr; }
  .geo-service h3 { margin-top: 28px; }
}

@media (max-width: 720px) {
  .geo-shell { width: min(100% - 32px, 1160px); }
  .geo-topbar .geo-shell { min-height: 29px; font-size: 11px; }
  .geo-topbar span:last-child { display: none; }
  .geo-nav { min-height: 62px; }
  .geo-console-entry { min-height: 38px; padding: 0 11px; font-size: 12px; }
  .geo-links { display: none; position: absolute; top: 62px; left: 0; right: 0; padding: 15px 16px 18px; flex-direction: column; align-items: stretch; gap: 0; border-bottom: 1px solid var(--geo-line); background: #fff; box-shadow: 0 10px 20px rgba(15,35,55,.08); }
  .geo-links[data-open="true"] { display: flex; }
  .geo-links a { padding: 10px 0; }
  .geo-nav-action { justify-content: center; margin-top: 8px; }
  .geo-menu { display: block; }
  .geo-hero .geo-shell { gap: 30px; padding: 48px 0 42px; }
  .geo-hero h1 { font-size: clamp(34px, 10.5vw, 39px); }
  .geo-hero-lead { margin-top: 19px; font-size: 16px; }
  .geo-actions { display: grid; grid-template-columns: 1fr; }
  .geo-button { width: 100%; }
  .geo-metrics strong { font-size: 25px; }
  .geo-section { padding: 65px 0; }
  .geo-section-head { margin-bottom: 30px; }
  .geo-section h2 { font-size: 31px; }
  .geo-section-head > p:last-child { font-size: 15px; }
  .geo-outcome-grid { gap: 10px; margin-bottom: 22px; }
  .geo-outcome-grid article { padding: 18px; }
  .geo-truth-grid { grid-template-columns: 1fr; }
  .geo-truth, .geo-method { padding: 22px; }
  .geo-prompt-table-wrap { overflow: hidden; }
  .geo-prompt-table { display: block; min-width: 0; }
  .geo-prompt-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    white-space: nowrap;
  }
  .geo-prompt-table tbody,
  .geo-prompt-table tr,
  .geo-prompt-table td { display: block; width: 100%; }
  .geo-prompt-table tr { padding: 20px; border-bottom: 1px solid #dce6ed; }
  .geo-prompt-table tr:last-child { border-bottom: 0; }
  .geo-prompt-table td,
  .geo-prompt-table .prompt {
    width: 100%;
    padding: 0;
    border: 0;
  }
  .geo-prompt-table td + td { margin-top: 15px; }
  .geo-prompt-table td::before {
    display: block;
    margin-bottom: 4px;
    color: #60798c;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: .05em;
  }
  .geo-prompt-table td:nth-child(1)::before { content: "固定测试问题"; }
  .geo-prompt-table td:nth-child(2)::before { content: "联网观测"; }
  .geo-prompt-table td:nth-child(3)::before { content: "来源与收录状态"; }
  .geo-loop,
  .geo-section.dark .geo-loop {
    grid-template-columns: 1fr;
    gap: 12px;
    border: 0;
  }
  .geo-loop article,
  .geo-loop article:nth-child(3),
  .geo-loop article:nth-child(n + 4) {
    min-height: 0;
    padding: 20px;
    border: 1px solid #d6e0e8;
    border-radius: 14px;
    box-shadow: 0 10px 24px rgba(9, 35, 61, .08);
  }
  .geo-loop h3 { margin-top: 18px; }
  .geo-service { padding: 24px; }
  .geo-product { padding: 24px; }
  .geo-capability-flow b { display: none; }
  .geo-boundary { grid-template-columns: 1fr; gap: 5px; }
  .geo-cta { padding: 64px 0; }
  .geo-cta-inner, .geo-footer .geo-shell { display: block; }
  .geo-cta .geo-button { margin-top: 30px; }
  .geo-footer .geo-shell > * + * { display: inline-block; margin-top: 12px; }
  .geo-article-hero { padding: 49px 0 43px; }
  .geo-article-hero .intro { font-size: 16px; }
  .geo-article { padding-top: 48px; padding-bottom: 58px; }
  .geo-article h2 { margin-top: 38px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .geo-button { transition: none; }
}