:root {
  --ocean-950: #052a42; --ocean-900: #073b5c; --ocean-800: #0b5278;
  --ocean-100: #dff1f4; --ocean-50: #eff8f8; --orange: #ef6a3a;
  --orange-dark: #be4825; --ink: #17303e; --muted: #5b6f78; --paper: #fffdf8;
  --line: #cfe1e3; --shadow: 0 18px 50px rgba(5,42,66,.10); --radius: 24px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif; line-height: 1.72; overflow-x: clip; }
a { color: inherit; text-decoration-thickness: .08em; text-underline-offset: .18em; }
button, input { font: inherit; }
img, svg { max-width: 100%; }
.shell { width: min(1180px, calc(100% - 40px)); margin-inline: auto; min-width: 0; }
.narrow { width: min(780px, calc(100% - 40px)); }
.skip-link { position: fixed; left: 12px; top: -100px; z-index: 20; background: white; padding: 10px 14px; }
.skip-link:focus { top: 12px; }
.utility-bar { background: var(--ocean-950); color: #d7eef3; font-size: .78rem; }
.utility-inner { min-height: 38px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.utility-links { display: flex; flex-wrap: wrap; gap: 16px; }
.utility-links a { text-decoration: none; }
.site-header { background: rgba(255,253,248,.96); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; backdrop-filter: blur(12px); }
.header-inner { min-height: 76px; display: flex; align-items: center; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; text-decoration: none; margin-right: auto; min-width: 0; overflow-wrap: anywhere; }
.brand-mark { flex: 0 0 auto; display: grid; place-items: center; width: 36px; height: 36px; border-radius: 12px 4px 12px 4px; color: white; background: var(--orange); }
.primary-links { display: flex; align-items: center; flex-wrap: wrap; justify-content: flex-end; gap: 4px; }
.primary-links a { text-decoration: none; padding: 8px 10px; border-radius: 999px; font-size: .9rem; }
.primary-links a:hover, .primary-links a:focus-visible { background: var(--ocean-100); }
.nav-toggle { display: none; border: 1px solid var(--line); background: white; color: var(--ocean-900); padding: 8px 12px; border-radius: 12px; }
.hero { background: linear-gradient(135deg,var(--ocean-50),#fff4e9); border-bottom: 1px solid var(--line); }
.hero-grid { padding: 78px 0; display: grid; grid-template-columns: minmax(0,1.15fr) minmax(310px,.85fr); gap: clamp(30px,6vw,86px); align-items: center; }
.hero-copy h1 { margin: 8px 0 20px; color: var(--ocean-950); font-size: clamp(2.8rem,8vw,6.7rem); line-height: .95; letter-spacing: -.07em; overflow-wrap: anywhere; }
.hero-lead { max-width: 660px; font-size: 1.16rem; }
.eyebrow { margin: 0 0 8px; color: var(--orange-dark); font-size: .78rem; font-weight: 850; letter-spacing: .14em; text-transform: uppercase; }
.poster-panel { position: relative; padding: 34px; color: white; background: var(--ocean-900); border-radius: 70px 16px 70px 16px; box-shadow: var(--shadow); overflow: hidden; }
.poster-panel::after { content:""; position:absolute; right:-55px; top:-55px; width:160px; height:160px; border:24px solid rgba(239,106,58,.9); border-radius:50%; }
.poster-panel h2 { position: relative; margin: 52px 0 24px; font-size: clamp(1.45rem,3vw,2.15rem); line-height: 1.25; }
.poster-index { position: absolute; top: 25px; left: 32px; color: #9fd3dd; font-size: .78rem; letter-spacing: .2em; }
.poster-panel ol { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.poster-panel li { display: grid; grid-template-columns: 42px 1fr; align-items: center; gap: 12px; padding: 10px 0; border-top: 1px solid rgba(255,255,255,.16); }
.poster-panel li b { color: #ffb08c; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 10px 18px; border: 1px solid var(--orange); border-radius: 14px; color: white; background: var(--orange); font-weight: 750; text-decoration: none; cursor: pointer; }
.button:hover, .button:focus-visible { background: var(--orange-dark); border-color: var(--orange-dark); }
.button-ghost { color: var(--ocean-900); background: transparent; border-color: var(--ocean-800); }
.section { padding-block: 76px; }
.section-tint { background: var(--ocean-50); border-block: 1px solid var(--line); }
.section-heading { max-width: 760px; margin-bottom: 30px; }
.section h2 { margin: 0 0 14px; color: var(--ocean-950); font-size: clamp(1.55rem,3vw,2.45rem); line-height: 1.2; }
.split-feature { display: grid; grid-template-columns: minmax(0,.88fr) minmax(0,1.12fr); gap: clamp(28px,7vw,92px); align-items: start; }
.notice { padding: 18px 20px; border-left: 5px solid var(--orange); background: #fff1e8; border-radius: 6px 18px 18px 6px; }
.card-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 18px; }
.soft-card { min-width: 0; padding: 26px; background: rgba(255,255,255,.92); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 10px 28px rgba(5,42,66,.06); }
.soft-card h3 { color: var(--ocean-900); font-size: 1.2rem; line-height: 1.3; }
.card-kicker, .evidence-line { display: block; color: var(--muted); font-size: .78rem; font-weight: 750; letter-spacing: .06em; }
.text-link { color: var(--orange-dark); font-weight: 780; }
.feature-card { background: linear-gradient(145deg,#fff,#fff7ef); }
.dark-section { color: #d7eaf0; background: var(--ocean-950); }
.dark-section h2 { color: white; }
.dark-section .eyebrow { color: #ffb08c; }
.light-link { color: #ffc0a1; }
.method-stack { display: grid; gap: 12px; }
.method-stack div { padding: 18px; display: grid; grid-template-columns: 120px 1fr; gap: 18px; background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.12); border-radius: 18px; }
.method-stack span { color: #bdd4db; }
.article-list { display: grid; gap: 12px; }
.line-card { min-width: 0; padding: 22px 0; border-top: 1px solid var(--line); }
.line-card > span { color: var(--orange-dark); font-size: .78rem; font-weight: 800; }
.line-card h3 { margin: 5px 0; font-size: 1.15rem; }
.faq { display: grid; grid-template-columns: .65fr 1.35fr; gap: 64px; }
.faq-list details { padding: 18px 0; border-top: 1px solid var(--line); }
.faq-list summary { color: var(--ocean-900); font-weight: 800; cursor: pointer; }
.page-hero { padding: 72px 0; color: white; background: var(--ocean-900); }
.page-hero h1 { margin: 10px 0 18px; font-size: clamp(2.35rem,6vw,4.9rem); line-height: 1.05; overflow-wrap: anywhere; }
.page-hero p:not(.eyebrow) { color: #d3e7ed; font-size: 1.12rem; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.tag-pill, .status-chip { display: inline-flex; padding: 6px 11px; border: 1px solid var(--line); border-radius: 999px; background: white; color: var(--ocean-800); font-size: .82rem; text-decoration: none; }
.number-list { padding: 0; margin: 0; list-style: none; display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 18px; }
.number-list li { padding: 24px; background: white; border: 1px solid var(--line); border-radius: 20px; }
.number-list span { color: var(--orange); font-size: 1.8rem; font-weight: 850; }
.source-note { border-top: 1px solid var(--line); }
.article-hero { padding: 70px 0 58px; background: linear-gradient(145deg,var(--ocean-50),#fff); border-bottom: 1px solid var(--line); }
.article-shell { width: min(850px,calc(100% - 40px)); }
.article-hero h1 { margin: 10px 0 20px; color: var(--ocean-950); font-size: clamp(2.25rem,5vw,4.4rem); line-height: 1.08; }
.article-lead { font-size: 1.2rem; }
.byline { display: flex; flex-wrap: wrap; gap: 9px 20px; color: var(--muted); font-size: .85rem; margin-block: 22px 12px; }
.article-layout { display: grid; grid-template-columns: minmax(0,1fr) 330px; gap: 52px; align-items: start; padding-block: 66px; }
.article-content { min-width: 0; }
.article-section { padding: 10px 0 28px; }
.summary-box { padding: 24px; margin-bottom: 24px; border-radius: 20px; background: var(--ocean-50); border: 1px solid var(--line); }
.evidence-panel { padding: 24px; background: #fff7ef; border: 1px solid #f1d4c3; border-radius: 22px; position: sticky; top: 100px; }
.evidence-panel h2 { font-size: 1.35rem; }
.evidence-panel dt { font-weight: 800; color: var(--ocean-900); }
.evidence-panel dd { margin: 3px 0 15px; }
.check-list { padding-left: 1.2em; }
.check-list li::marker { color: var(--orange); }
.resource-list, .author-list { margin: 0; padding: 0; list-style: none; display: grid; gap: 14px; }
.resource-list li, .author-list li { padding: 22px; background: white; border: 1px solid var(--line); border-radius: 18px; }
.resource-list p, .author-list span { display: block; margin: 6px 0 0; color: var(--muted); }
.tool-panel { padding: clamp(22px,5vw,48px); border: 1px solid var(--line); border-radius: 30px; background: white; box-shadow: var(--shadow); }
.decision-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 16px; }
.decision-grid article { padding: 22px; border-radius: 20px; background: var(--ocean-50); }
.source-card-demo dl { display: grid; grid-template-columns: 170px 1fr; border-top: 1px solid var(--line); }
.source-card-demo dt, .source-card-demo dd { margin: 0; padding: 14px 8px; border-bottom: 1px solid var(--line); }
.source-card-demo dt { font-weight: 800; }
.audit-form fieldset { border: 0; padding: 0; display: grid; gap: 12px; }
.audit-form legend { margin-bottom: 18px; color: var(--ocean-950); font-size: 1.35rem; font-weight: 850; }
.audit-form label { padding: 16px; border: 1px solid var(--line); border-radius: 14px; }
.audit-form input { width: 20px; height: 20px; vertical-align: middle; margin-right: 8px; accent-color: var(--orange); }
.audit-form output { display: block; margin-top: 18px; color: var(--orange-dark); font-weight: 850; }
.route-map { list-style: none; counter-reset: route; padding: 0; display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 14px; }
.route-map li { padding: 20px; background: var(--ocean-50); border-radius: 18px; }
.route-map b { color: var(--orange-dark); }
.not-found { background: linear-gradient(145deg,var(--ocean-950),var(--ocean-800)); }
.site-footer { color: #d6e8ed; background: #041f31; padding: 56px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 42px; }
.footer-grid h2 { color: white; font-size: .95rem; }
.footer-grid nav { display: grid; align-content: start; gap: 7px; }
.footer-grid a { color: #c7dfe5; }
.footer-note { display: flex; justify-content: space-between; gap: 20px; margin-top: 38px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.12); color: #92afb8; font-size: .78rem; }
@media (max-width: 900px) {
  .utility-links { display: none; }
  .nav-toggle { display: inline-flex; }
  .header-inner { flex-wrap: wrap; padding-block: 12px; }
  .primary-links { width: 100%; display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); padding-bottom: 10px; }
  .primary-links.is-collapsed { display: none; }
  .hero-grid, .split-feature, .article-layout, .faq { grid-template-columns: 1fr; }
  .hero-grid { padding: 58px 0; }
  .card-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .number-list { grid-template-columns: 1fr; }
  .evidence-panel { position: static; }
  .route-map { grid-template-columns: repeat(2,minmax(0,1fr)); }
}
@media (max-width: 560px) {
  .shell, .narrow, .article-shell { width: min(100% - 28px,1180px); }
  .utility-inner { min-height: 34px; }
  .brand { font-size: .88rem; }
  .brand-mark { width: 32px; height: 32px; }
  .primary-links { grid-template-columns: 1fr; }
  .hero-grid { padding: 42px 0; }
  .hero-copy h1 { font-size: clamp(2.45rem,17vw,4.7rem); }
  .poster-panel { padding: 28px 22px; border-radius: 42px 12px 42px 12px; }
  .section { padding-block: 54px; }
  .card-grid, .decision-grid, .route-map, .footer-grid { grid-template-columns: 1fr; }
  .method-stack div, .source-card-demo dl { grid-template-columns: 1fr; }
  .source-card-demo dt { padding-bottom: 0; border-bottom: 0; }
  .source-card-demo dd { padding-top: 3px; }
  .footer-note { flex-direction: column; }
}
@media print { .utility-bar,.site-header,.site-footer,.hero-actions,.button { display:none !important; } body { background:white; } .tool-panel { box-shadow:none; } }