:root {
  --ink: #07172e;
  --navy: #06152c;
  --blue: #1268ff;
  --cyan: #46d7ff;
  --coral: #ff8068;
  --paper: #f5f8fc;
  --white: #ffffff;
  --muted: #5e7087;
  --line: #dce5ef;
  --max: 1180px;
  --shadow: 0 24px 70px rgba(7, 32, 68, .13);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: Inter, "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; }
.wrap { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.eyebrow { margin: 0 0 14px; color: var(--blue); font-weight: 800; letter-spacing: .08em; font-size: .82rem; text-transform: uppercase; }
.eyebrow.light { color: var(--cyan); }
.section { padding: 108px 0; }
.section-soft { background: var(--paper); }
.section-dark { color: var(--white); background: var(--navy); }
.section-head { max-width: 760px; margin-bottom: 48px; }
.section-head h2, .split-copy h2 { margin: 0 0 18px; font-size: clamp(2rem, 4vw, 3.4rem); line-height: 1.16; letter-spacing: -.045em; }
.section-head p, .split-copy > p { margin: 0; color: var(--muted); font-size: 1.08rem; }
.section-dark .section-head p, .section-dark .split-copy > p { color: #aebed0; }

.site-header { position: sticky; top: 0; z-index: 50; border-bottom: 1px solid rgba(220,229,239,.75); background: rgba(255,255,255,.92); backdrop-filter: blur(18px); }
.nav { min-height: 76px; display: flex; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 900; font-size: 1.08rem; white-space: nowrap; }
.brand-logo { display: block; width: 145px; height: auto; }
.site-footer .brand-logo { padding: 6px 10px; border-radius: 9px; background: var(--white); box-sizing: content-box; }
.nav-links { margin-left: auto; display: flex; align-items: center; gap: 25px; font-weight: 700; font-size: .94rem; }
.nav-links a:not(.button):hover { color: var(--blue); }
.button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; gap: 9px; padding: 0 22px; border-radius: 999px; color: var(--white); background: var(--blue); font-weight: 800; border: 1px solid var(--blue); transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(18,104,255,.25); }
.button-light { color: var(--ink); background: var(--white); border-color: var(--white); }
.button-ghost { color: var(--ink); background: transparent; border-color: var(--line); }
.button-small { min-height: 42px; padding: 0 18px; }
.menu-button { display: none; margin-left: auto; width: 44px; height: 44px; border-radius: 12px; border: 1px solid var(--line); background: var(--white); color: var(--ink); }
.mobile-menu { padding: 0 20px 18px; border-top: 1px solid var(--line); }
.mobile-menu a { display: block; padding: 11px 4px; font-weight: 750; }

.hero { position: relative; overflow: hidden; min-height: 740px; display: flex; align-items: center; color: var(--white); background: var(--navy); }
.hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(6,21,44,.99) 0%, rgba(6,21,44,.9) 38%, rgba(6,21,44,.18) 70%, rgba(6,21,44,.3) 100%); }
.hero-image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; opacity: .74; }
.hero-inner { position: relative; z-index: 2; padding: 110px 0 100px; }
.hero-copy { max-width: 720px; }
.hero h1 { margin: 0; font-size: clamp(3rem, 6vw, 5.8rem); line-height: .98; letter-spacing: -.065em; font-weight: 950; }
.hero h1 span { color: var(--cyan); }
.hero-lead { max-width: 660px; margin: 28px 0 32px; color: #d7e4f3; font-size: clamp(1.05rem, 2vw, 1.28rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-note { display: flex; gap: 25px; margin-top: 45px; color: #aebed0; font-size: .9rem; }
.hero-note span::before { content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 8px; border-radius: 50%; background: var(--cyan); vertical-align: 1px; }

.signal-bar { border-bottom: 1px solid var(--line); background: var(--white); }
.signals { display: grid; grid-template-columns: repeat(4, 1fr); }
.signal { padding: 26px 22px; border-right: 1px solid var(--line); }
.signal:first-child { border-left: 1px solid var(--line); }
.signal strong { display: block; font-size: 1rem; }
.signal span { color: var(--muted); font-size: .88rem; }

.service-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.service-card { position: relative; min-height: 340px; padding: 34px; overflow: hidden; border: 1px solid var(--line); border-radius: 24px; background: var(--white); transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease; }
.service-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: #bdcee1; }
.service-card::after { content: attr(data-index); position: absolute; right: 24px; top: 8px; color: #edf2f8; font-size: 5.5rem; line-height: 1; font-weight: 950; }
.service-card h3 { position: relative; z-index: 2; margin: 42px 0 12px; font-size: 1.8rem; line-height: 1.2; letter-spacing: -.03em; }
.service-card p { position: relative; z-index: 2; max-width: 460px; margin: 0 0 26px; color: var(--muted); }
.text-link { color: var(--blue); font-weight: 850; }
.text-link::after { content: " →"; }
.tag { display: inline-flex; padding: 7px 12px; border-radius: 999px; color: var(--blue); background: #eaf2ff; font-weight: 800; font-size: .78rem; }

.split { display: grid; grid-template-columns: .9fr 1.1fr; gap: 78px; align-items: center; }
.audit-card { padding: 34px; border: 1px solid rgba(255,255,255,.14); border-radius: 28px; background: linear-gradient(145deg, rgba(255,255,255,.11), rgba(255,255,255,.04)); box-shadow: 0 30px 80px rgba(0,0,0,.22); }
.audit-row { display: grid; grid-template-columns: 44px 1fr auto; gap: 15px; align-items: center; padding: 19px 0; border-bottom: 1px solid rgba(255,255,255,.11); }
.audit-row:last-child { border-bottom: 0; }
.audit-number { width: 40px; height: 40px; display: grid; place-items: center; border-radius: 13px; color: var(--navy); background: var(--cyan); font-weight: 900; }
.audit-row strong { display: block; }
.audit-row small { color: #9eb0c5; }
.audit-status { color: var(--cyan); font-size: .82rem; font-weight: 800; }

.steps { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.step { padding: 36px 24px; border-right: 1px solid var(--line); }
.step:first-child { border-left: 1px solid var(--line); }
.step b { color: var(--coral); font-size: .82rem; letter-spacing: .08em; }
.step h3 { margin: 16px 0 10px; font-size: 1.25rem; }
.step p { margin: 0; color: var(--muted); font-size: .94rem; }

.case-grid { display: grid; grid-template-columns: 1.3fr .85fr .85fr; gap: 18px; }
.case { min-height: 320px; display: flex; flex-direction: column; justify-content: flex-end; padding: 30px; border-radius: 24px; color: var(--white); background: linear-gradient(160deg, #123463, #07172e); }
.case:nth-child(2) { background: linear-gradient(160deg, #0f6c8c, #071e37); }
.case:nth-child(3) { background: linear-gradient(160deg, #bd5949, #542a2d); }
.case small { color: rgba(255,255,255,.66); }
.case h3 { margin: 9px 0; font-size: 1.45rem; line-height: 1.25; }
.case strong { color: var(--cyan); font-size: 1.1rem; }

.insight-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.insight { padding: 28px; border: 1px solid var(--line); border-radius: 20px; background: var(--white); }
.insight small { color: var(--blue); font-weight: 800; }
.insight h3 { margin: 12px 0 16px; line-height: 1.35; }
.insight p { margin: 0 0 22px; color: #60748b; line-height: 1.7; }

.cta { padding: 48px; display: flex; align-items: center; justify-content: space-between; gap: 30px; border-radius: 30px; color: var(--white); background: linear-gradient(120deg, #0a2853, #1268ff); box-shadow: var(--shadow); }
.cta h2 { margin: 0 0 8px; font-size: clamp(1.8rem, 4vw, 3rem); line-height: 1.12; }
.cta p { margin: 0; color: #dbe8ff; }

.site-footer { padding: 56px 0 30px; color: #b5c3d2; background: #041022; }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 40px; }
.footer-grid h3 { color: var(--white); font-size: .9rem; }
.footer-grid a { display: block; margin: 9px 0; font-size: .9rem; }
.footer-brand p { max-width: 350px; }
.copyright { margin-top: 38px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.1); font-size: .82rem; }

.page-hero { padding: 120px 0 90px; color: var(--white); background: radial-gradient(circle at 82% 15%, rgba(70,215,255,.2), transparent 26%), var(--navy); }
.page-hero .breadcrumbs { color: #91a7bf; font-size: .85rem; }
.page-hero h1 { max-width: 860px; margin: 20px 0; font-size: clamp(2.8rem, 6vw, 5.2rem); line-height: 1.04; letter-spacing: -.055em; }
.page-hero p { max-width: 720px; margin: 0; color: #c1d0df; font-size: 1.14rem; }
.content-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.content-card { padding: 30px; border: 1px solid var(--line); border-radius: 22px; }
.content-card h3 { margin-top: 0; font-size: 1.35rem; }
.content-card p, .content-card li { color: var(--muted); }
.check-list { list-style: none; padding: 0; }
.check-list li { position: relative; padding: 7px 0 7px 25px; }
.check-list li::before { content: "✓"; position: absolute; left: 0; color: var(--blue); font-weight: 900; }
.article { max-width: 820px; }
.article h2 { margin: 55px 0 14px; font-size: 2rem; line-height: 1.2; }
.article h3 { margin: 32px 0 12px; font-size: 1.3rem; line-height: 1.35; }
.article p, .article li { color: #42566f; font-size: 1.04rem; line-height: 1.9; }
.article li + li { margin-top: 8px; }
.article a:not(.button) { color: var(--blue); text-decoration: underline; text-underline-offset: 3px; }
.article-shell { display: flex; justify-content: center; }
.article-meta, .hero-meta { display: flex; flex-wrap: wrap; gap: 10px 22px; color: #6c8096; font-size: .88rem; }
.article-meta { margin-bottom: 28px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.hero-meta { margin-top: 28px; color: #b7cae0; }
.hero-meta span + span::before, .article-meta span + span::before { content: "·"; margin-right: 22px; color: #98aabd; }
.article-summary { margin: 0 0 48px; padding: 26px 30px; border: 1px solid #cfe0f6; border-radius: 18px; background: #f3f8ff; }
.article-summary strong { display: block; margin-bottom: 8px; color: var(--blue); font-size: .9rem; letter-spacing: .08em; }
.article-summary p { margin: 0; color: #253f5c; }
.table-wrap { margin: 24px 0 30px; overflow-x: auto; border: 1px solid var(--line); border-radius: 16px; }
.article-table { width: 100%; min-width: 650px; border-collapse: collapse; background: var(--white); }
.article-table th, .article-table td { padding: 15px 17px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; line-height: 1.65; }
.article-table th { color: #17385c; background: #f1f6fb; font-size: .9rem; }
.article-table tr:last-child td { border-bottom: 0; }
.faq-list { display: grid; gap: 12px; }
.faq-list details { padding: 0 22px; border: 1px solid var(--line); border-radius: 14px; background: var(--white); }
.faq-list summary { padding: 18px 0; color: #17385c; font-weight: 800; cursor: pointer; }
.faq-list p { margin: 0 0 20px; }
.related-guides { margin-top: 60px; padding-top: 8px; border-top: 1px solid var(--line); }
.related-links { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.article .related-link { display: flex; justify-content: space-between; gap: 16px; padding: 18px 20px; border: 1px solid var(--line); border-radius: 14px; color: #17385c; text-decoration: none; font-weight: 750; }
.article .related-link:hover { border-color: #9fc3f4; background: #f5f9ff; }
.quote { margin: 28px 0; padding: 24px 28px; border-left: 4px solid var(--coral); background: var(--paper); font-size: 1.1rem; font-weight: 700; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { display: grid; gap: 7px; }
.field.full { grid-column: 1 / -1; }
.field label { font-weight: 750; }
.field input, .field textarea, .field select { width: 100%; padding: 14px 16px; border: 1px solid #cbd8e6; border-radius: 12px; background: var(--white); color: var(--ink); }
.field textarea { min-height: 130px; resize: vertical; }

@media (max-width: 980px) {
  .nav-links { display: none; }
  .menu-button { display: grid; place-items: center; }
  .hero { min-height: 690px; }
  .hero::after { background: linear-gradient(90deg, rgba(6,21,44,.98), rgba(6,21,44,.84)); }
  .hero-image { object-position: 62% center; opacity: .5; }
  .split, .footer-grid { grid-template-columns: 1fr 1fr; }
  .case-grid, .insight-grid { grid-template-columns: 1fr 1fr; }
  .case:first-child { grid-column: 1 / -1; }
  .steps { grid-template-columns: 1fr 1fr; }
  .step:nth-child(2) { border-right: 1px solid var(--line); }
}

@media (max-width: 680px) {
  .wrap { width: min(calc(100% - 28px), var(--max)); }
  .section { padding: 76px 0; }
  .hero { min-height: 670px; }
  .hero-inner { padding: 80px 0; }
  .hero h1 { font-size: clamp(2.7rem, 15vw, 4.2rem); }
  .hero-note { display: grid; gap: 8px; }
  .signals { grid-template-columns: 1fr 1fr; }
  .signal:nth-child(3) { border-left: 1px solid var(--line); }
  .service-grid, .split, .case-grid, .insight-grid, .content-grid, .footer-grid, .form-grid { grid-template-columns: 1fr; }
  .case:first-child, .field.full { grid-column: auto; }
  .service-card { min-height: 300px; padding: 27px; }
  .steps { grid-template-columns: 1fr; }
  .step { border-left: 1px solid var(--line); }
  .cta { padding: 34px 26px; align-items: flex-start; flex-direction: column; }
  .page-hero { padding: 90px 0 70px; }
  .article h2 { font-size: 1.65rem; }
  .article-summary { padding: 22px; }
  .related-links { grid-template-columns: 1fr; }
  .hero-meta span + span::before, .article-meta span + span::before { content: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}