:root {
  --night: #082d30;
  --night-2: #041d20;
  --ink: #12393a;
  --teal: #087f77;
  --mint: #48c6ad;
  --mint-soft: #dff5ee;
  --cyan: #68d6df;
  --paper: #f7fbf9;
  --white: #fff;
  --muted: #617879;
  --line: #d6e5e1;
  --orange: #f2a45d;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif; line-height: 1.7; }
a { color: inherit; }
.wrap { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
.skip-link { position: fixed; top: -60px; left: 12px; z-index: 99; padding: 10px 16px; border-radius: 8px; background: white; }
.skip-link:focus { top: 12px; }

.site-header { position: sticky; top: 0; z-index: 20; border-bottom: 1px solid rgba(255,255,255,.1); color: white; background: rgba(4,29,32,.94); backdrop-filter: blur(16px); }
.header-inner { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: white; text-decoration: none; white-space: nowrap; }
.brand-box { display: grid; width: 40px; height: 40px; place-items: center; border-radius: 10px 10px 3px 10px; color: var(--night-2); background: var(--mint); font-weight: 800; }
.brand strong, .brand small { display: block; }
.brand strong { font-size: 18px; letter-spacing: .1em; }
.brand small { color: rgba(255,255,255,.5); font-size: 9px; letter-spacing: .08em; }
nav { display: flex; gap: clamp(14px, 2vw, 28px); }
nav a { color: rgba(255,255,255,.7); text-decoration: none; font-size: 13px; }
nav a:hover, nav a:focus-visible { color: white; }
.header-cta { padding: 8px 13px; border: 1px solid rgba(104,214,223,.34); border-radius: 999px; color: var(--cyan); text-decoration: none; font-size: 11px; font-weight: 800; white-space: nowrap; }
.header-cta:hover, .header-cta:focus-visible { color: var(--night-2); background: var(--cyan); }

.hero { position: relative; overflow: hidden; color: white; background: var(--night); }
.hero::after { content: ""; position: absolute; width: 550px; height: 550px; right: -220px; top: -190px; border-radius: 50%; background: radial-gradient(circle, rgba(72,198,173,.25), transparent 68%); }
.hero-grid-bg { position: absolute; inset: 0; opacity: .18; background-image: linear-gradient(rgba(104,214,223,.18) 1px, transparent 1px), linear-gradient(90deg, rgba(104,214,223,.18) 1px, transparent 1px); background-size: 60px 60px; mask-image: linear-gradient(90deg, black, transparent 80%); }
.hero-layout { position: relative; z-index: 1; min-height: 680px; display: grid; grid-template-columns: 1.08fr .92fr; gap: 80px; align-items: center; padding-block: 86px 70px; }
.eyebrow, .section-label { margin: 0 0 18px; color: var(--teal); font-size: 11px; font-weight: 800; letter-spacing: .16em; }
.hero .eyebrow { color: var(--cyan); }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 26px; font-size: clamp(42px, 5.8vw, 72px); line-height: 1.15; letter-spacing: -.04em; }
h1 em { color: var(--mint); font-style: normal; }
h2 { margin-bottom: 18px; font-size: clamp(30px, 4vw, 48px); line-height: 1.25; letter-spacing: -.03em; }
h3 { line-height: 1.4; }
.lead { max-width: 680px; margin-bottom: 34px; color: rgba(255,255,255,.7); font-size: 18px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; padding: 0 22px; border-radius: 9px; text-decoration: none; font-weight: 700; font-size: 14px; transition: transform .2s ease; }
.button:hover { transform: translateY(-2px); }
.button.primary { color: var(--night-2); background: var(--mint); }
.button.ghost { color: white; border: 1px solid rgba(255,255,255,.25); }
.button.dark { color: white; background: var(--night); }
.audit-card { padding: 28px; border: 1px solid rgba(104,214,223,.23); border-radius: 24px; background: rgba(4,29,32,.72); box-shadow: 0 30px 90px rgba(0,0,0,.25); }
.audit-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 23px; }
.audit-head span { color: var(--cyan); font: 700 10px ui-monospace, monospace; letter-spacing: .14em; }
.audit-flow { display: grid; gap: 6px; }
.audit-flow div { display: grid; grid-template-columns: 36px 1fr auto; gap: 12px; align-items: center; padding: 13px 14px; border: 1px solid rgba(255,255,255,.09); border-radius: 10px; background: rgba(255,255,255,.04); }
.audit-flow i { color: var(--mint); font: normal 700 11px ui-monospace, monospace; }
.audit-flow span { font-weight: 700; }
.audit-flow small { color: rgba(255,255,255,.44); }
.audit-card > p { margin: 20px 0 0; color: rgba(255,255,255,.5); font-size: 12px; }
.hero-metrics { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid rgba(255,255,255,.12); }
.hero-metrics div { padding: 24px 20px; }
.hero-metrics div + div { border-left: 1px solid rgba(255,255,255,.12); }
.hero-metrics strong, .hero-metrics span { display: block; }
.hero-metrics strong { color: var(--mint); font-size: 14px; }
.hero-metrics span { color: rgba(255,255,255,.5); font-size: 12px; }

.section { padding-block: 106px; }
.challenge { background: white; }
.challenge-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 110px; }
.challenge-copy { color: var(--muted); font-size: 17px; }
.challenge-copy strong { color: var(--ink); }
.policy-bridge { color: white; background: linear-gradient(135deg, #0a403f 0%, var(--night-2) 72%); }
.policy-bridge-layout { display: grid; grid-template-columns: .82fr 1.18fr; gap: 72px; align-items: start; }
.policy-bridge .section-label { color: var(--cyan); }
.policy-bridge-copy > p:not(.section-label) { max-width: 590px; color: rgba(255,255,255,.66); }
.policy-trust { display: flex; flex-wrap: wrap; gap: 8px; margin: 28px 0 34px; }
.policy-trust span { padding: 6px 10px; border: 1px solid rgba(104,214,223,.22); border-radius: 999px; color: var(--cyan); background: rgba(104,214,223,.08); font-size: 11px; font-weight: 700; }
.policy-bridge .button.dark { color: var(--night-2); background: var(--mint); }
.policy-value-grid { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid rgba(255,255,255,.14); border-left: 1px solid rgba(255,255,255,.14); }
.policy-value-grid article { min-height: 220px; padding: 25px; border-right: 1px solid rgba(255,255,255,.14); border-bottom: 1px solid rgba(255,255,255,.14); }
.policy-value-grid b { color: var(--mint); font: 700 11px ui-monospace, monospace; }
.policy-value-grid h3 { margin: 34px 0 10px; font-size: 18px; }
.policy-value-grid p { margin: 0; color: rgba(255,255,255,.52); font-size: 13px; }
.policy-disclaimer { margin-top: 34px; padding: 17px 20px; border-left: 3px solid var(--orange); color: rgba(255,255,255,.64); background: rgba(255,255,255,.05); font-size: 12px; }
.policy-disclaimer strong { color: white; }
.section-heading { max-width: 820px; margin-bottom: 46px; }
.section-heading > p:last-child { color: var(--muted); font-size: 16px; }
.service-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.service-grid article { min-height: 250px; padding: 25px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: white; transition: background .2s ease; }
.service-grid article:hover { background: var(--mint-soft); }
.service-grid b { color: var(--teal); font: 700 12px ui-monospace, monospace; }
.service-grid h3 { margin: 42px 0 10px; font-size: 19px; }
.service-grid p { color: var(--muted); font-size: 13px; }

.mrv { color: white; background: var(--night); }
.mrv .section-label { color: var(--cyan); }
.mrv .section-heading > p:last-child { color: rgba(255,255,255,.58); }
.object-map { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid rgba(255,255,255,.13); border-left: 1px solid rgba(255,255,255,.13); }
.object-map article { min-height: 180px; padding: 24px; border-right: 1px solid rgba(255,255,255,.13); border-bottom: 1px solid rgba(255,255,255,.13); }
.object-map b { color: var(--mint); }
.object-map p { margin: 26px 0 0; color: rgba(255,255,255,.5); font-size: 13px; }
.dictionary-panel { display: grid; grid-template-columns: .7fr 1.3fr; gap: 70px; margin-top: 42px; padding: 34px; border: 1px solid rgba(104,214,223,.22); border-radius: 18px; background: rgba(255,255,255,.04); }
.dictionary-panel > div:first-child p:last-child { color: rgba(255,255,255,.5); font-size: 13px; }
.dictionary-panel dl { display: grid; grid-template-columns: repeat(2, 1fr); margin: 0; }
.dictionary-panel dl div { padding: 15px 18px; border-left: 1px solid rgba(255,255,255,.12); border-bottom: 1px solid rgba(255,255,255,.12); }
.dictionary-panel dt { color: var(--cyan); font-weight: 700; }
.dictionary-panel dd { margin: 4px 0 0; color: rgba(255,255,255,.48); font-size: 12px; }

.evidence { background: white; }
.evidence-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.evidence-grid article { min-height: 300px; padding: 30px; border: 1px solid var(--line); border-radius: 17px; }
.evidence-grid span { color: var(--teal); font-size: 11px; font-weight: 800; letter-spacing: .08em; }
.evidence-grid h3 { margin: 27px 0 12px; font-size: 20px; }
.evidence-grid p { color: var(--muted); font-size: 13px; }
.qc-plan { display: grid; grid-template-columns: .7fr 1.3fr; gap: 65px; margin-top: 30px; padding: 32px; border-radius: 18px; background: var(--mint-soft); }
.qc-plan > div > p:last-child { color: var(--muted); font-size: 13px; }
.qc-plan ol { margin: 0; padding: 0; list-style: none; }
.qc-plan li { display: grid; grid-template-columns: 110px 1fr; gap: 20px; padding: 12px 0; border-bottom: 1px solid rgba(8,127,119,.18); }
.qc-plan b { color: var(--teal); }
.qc-plan span { color: var(--muted); font-size: 13px; }

.method { background: var(--mint-soft); }
.method-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 90px; }
.method-sticky { position: sticky; top: 120px; align-self: start; }
.method-sticky > p:last-child { color: var(--muted); }
.timeline { margin: 0; padding: 0; list-style: none; }
.timeline li { display: grid; grid-template-columns: 72px 1fr; gap: 20px; padding: 0 0 36px; }
.timeline li + li { padding-top: 4px; }
.timeline span { position: relative; display: grid; width: 46px; height: 46px; place-items: center; border-radius: 50%; color: white; background: var(--teal); font: 700 11px ui-monospace, monospace; }
.timeline span::after { content: ""; position: absolute; top: 46px; bottom: -52px; left: 50%; width: 1px; background: rgba(8,127,119,.25); }
.timeline li:last-child span::after { display: none; }
.timeline h3 { margin-bottom: 5px; }
.timeline p { margin: 0; color: var(--muted); }

.deliverables { color: white; background: var(--night-2); }
.section-heading.light .section-label { color: var(--cyan); }
.section-heading.light > p:last-child { color: rgba(255,255,255,.58); }
.deliverable-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.deliverable-grid article { min-height: 225px; padding: 28px; border: 1px solid rgba(255,255,255,.12); border-radius: 16px; background: rgba(255,255,255,.04); }
.deliverable-grid span { color: var(--mint); font: 700 13px ui-monospace, monospace; }
.deliverable-grid h3 { margin-top: 32px; font-size: 19px; }
.deliverable-grid p { color: rgba(255,255,255,.55); font-size: 13px; }

.quality { background: white; }
.quality-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 80px; align-items: center; }
.quality-layout > div:first-child > p:last-child { color: var(--muted); }
.question-wheel { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.question-wheel article { min-height: 150px; padding: 22px; border: 1px solid var(--line); border-radius: 14px; }
.question-wheel b, .question-wheel span { display: block; }
.question-wheel b { margin-bottom: 26px; color: var(--teal); font-size: 18px; }
.question-wheel span { color: var(--muted); font-size: 13px; }
.source-note { margin-top: 55px; padding: 28px 32px; border-left: 4px solid var(--orange); background: #fff7ed; }
.source-note p { margin: 6px 0 15px; color: var(--muted); font-size: 14px; }
.source-links { display: flex; flex-wrap: wrap; gap: 14px; }
.source-links a { color: var(--teal); font-size: 13px; font-weight: 700; }

.anomalies { background: #f3f7f5; }
.anomaly-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 13px; }
.anomaly-grid article { min-height: 265px; padding: 26px; border: 1px solid var(--line); border-radius: 16px; background: white; }
.anomaly-grid span { display: inline-block; padding: 4px 8px; border-radius: 5px; color: #a75a13; background: #fff0dd; font-size: 11px; font-weight: 800; }
.anomaly-grid h3 { margin: 25px 0 10px; font-size: 18px; }
.anomaly-grid p { color: var(--muted); font-size: 13px; }
.anomaly-grid small { display: block; margin-top: 20px; padding-top: 14px; border-top: 1px solid var(--line); color: var(--teal); font-size: 11px; }

.preparation { background: white; }
.preparation-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 80px; }
.preparation-layout > div:first-child > p:last-child { color: var(--muted); }
.checklist { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.checklist article { min-height: 150px; padding: 22px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.checklist b { color: var(--teal); }
.checklist p { margin: 19px 0 0; color: var(--muted); font-size: 12px; }

.acceptance { color: white; background: var(--night-2); }
.acceptance .section-label { color: var(--cyan); }
.acceptance-layout { display: grid; grid-template-columns: .6fr 1.4fr; gap: 80px; }
.acceptance-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.acceptance-grid article { min-height: 175px; padding: 22px; border: 1px solid rgba(255,255,255,.13); border-radius: 12px; }
.acceptance-grid b { color: var(--mint); }
.acceptance-grid p { margin: 28px 0 0; color: rgba(255,255,255,.5); font-size: 12px; }
.operations-note { margin: 24px 0 0; padding: 20px; border-left: 3px solid var(--cyan); color: rgba(255,255,255,.62); background: rgba(255,255,255,.05); font-size: 13px; }
.operations-note strong { color: white; }

.responsibility { background: #edf4f1; }
.responsibility-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.responsibility-grid article { padding: 30px; border-radius: 18px; background: white; }
.responsibility-grid span { display: inline-block; padding: 5px 9px; border-radius: 6px; color: var(--teal); background: var(--mint-soft); font-size: 12px; font-weight: 800; }
.responsibility-grid ul { margin: 25px 0 0; padding: 0; list-style: none; }
.responsibility-grid li { padding: 10px 0 10px 22px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.responsibility-grid li::before { content: "•"; float: left; margin-left: -17px; color: var(--teal); }

.faq { background: white; }
.faq-layout { display: grid; grid-template-columns: .55fr 1.45fr; gap: 90px; }
.faq details { border-top: 1px solid var(--line); }
.faq details:last-child { border-bottom: 1px solid var(--line); }
summary { position: relative; padding: 22px 44px 22px 0; cursor: pointer; font-weight: 700; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 8px; top: 18px; color: var(--teal); font-size: 24px; }
details[open] summary::after { content: "−"; }
details p { padding-right: 45px; color: var(--muted); }

.closing { padding-block: 78px; color: var(--night); background: var(--mint); }
.closing-inner { display: flex; align-items: flex-end; justify-content: space-between; gap: 30px; }
.closing .section-label { color: var(--night); opacity: .6; }
.closing h2 { max-width: 780px; margin: 0; }
footer { padding: 46px 0 28px; color: rgba(255,255,255,.68); background: var(--night-2); }
.footer-main { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 28px; }
.footer-main strong { color: white; font-size: 20px; }
.footer-main span { color: rgba(255,255,255,.4); font-size: 11px; letter-spacing: .1em; }
.footer-main p { margin: 6px 0 0; font-size: 13px; }
.footer-bottom { display: flex; justify-content: space-between; gap: 24px; margin-top: 32px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.12); font-size: 12px; }
.footer-bottom p { margin: 0; }

@media (max-width: 980px) {
  nav { display: none; }
  .hero-layout, .challenge-layout, .policy-bridge-layout, .method-layout, .quality-layout, .faq-layout, .dictionary-panel, .preparation-layout, .acceptance-layout, .qc-plan { grid-template-columns: 1fr; }
  .hero-layout { min-height: auto; padding-block: 72px 55px; }
  .audit-card { max-width: 650px; }
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .object-map, .anomaly-grid { grid-template-columns: repeat(2, 1fr); }
  .method-sticky { position: static; }
  .deliverable-grid { grid-template-columns: repeat(2, 1fr); }
  .responsibility-grid { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .wrap { width: min(100% - 28px, 1180px); }
  .header-inner { min-height: 66px; }
  .header-cta { display: none; }
  h1 { font-size: 42px; }
  .actions .button { width: 100%; }
  .audit-card { padding: 20px; }
  .audit-flow div { grid-template-columns: 32px 1fr; }
  .audit-flow small { display: none; }
  .hero-metrics { grid-template-columns: repeat(2, 1fr); }
  .hero-metrics div:nth-child(3) { border-left: 0; border-top: 1px solid rgba(255,255,255,.12); }
  .hero-metrics div:nth-child(4) { border-top: 1px solid rgba(255,255,255,.12); }
  .section { padding-block: 74px; }
  .service-grid, .policy-value-grid, .deliverable-grid, .question-wheel, .object-map, .dictionary-panel dl, .anomaly-grid, .checklist, .acceptance-grid, .evidence-grid { grid-template-columns: 1fr; }
  .qc-plan li { grid-template-columns: 1fr; gap: 3px; }
  .service-grid article { min-height: 215px; }
  .closing-inner { align-items: flex-start; flex-direction: column; }
  .footer-main { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; } }