:root {
  --ink: #0b1d2a;
  --muted: #5d6b75;
  --paper: #f5f8f7;
  --card: #ffffff;
  --teal: #047e75;
  --teal-dark: #04635d;
  --mint: #bceee2;
  --cyan: #4bc8d3;
  --line: #dbe5e3;
  --warm: #f2b85b;
  --shadow: 0 18px 50px rgba(9, 38, 45, .09);
  --radius: 22px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.container { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }
.skip-link { position: fixed; top: -100px; left: 20px; z-index: 100; background: #fff; padding: 10px 16px; }
.skip-link:focus { top: 12px; }

.site-header {
  position: sticky; top: 0; z-index: 20;
  border-bottom: 1px solid rgba(219,229,227,.78);
  background: rgba(245,248,247,.9);
  backdrop-filter: blur(16px);
}
.header-inner { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 800; letter-spacing: -.02em; }
.brand-mark { width: 38px; height: 38px; }
.brand small { display: block; margin-top: -4px; color: var(--muted); font-size: 10px; font-weight: 600; letter-spacing: .16em; }
.main-nav { display: flex; align-items: center; gap: 28px; font-size: 14px; font-weight: 650; }
.main-nav a:not(.nav-cta):hover { color: var(--teal); }
.nav-cta { padding: 10px 17px; border-radius: 999px; color: #fff; background: var(--ink); }
.menu-button { display: none; border: 0; background: transparent; font-size: 24px; }

.hero {
  position: relative; overflow: hidden;
  color: #fff;
  background:
    radial-gradient(circle at 80% 15%, rgba(75,200,211,.30), transparent 27%),
    radial-gradient(circle at 10% 90%, rgba(188,238,226,.16), transparent 25%),
    linear-gradient(135deg, #071a27 0%, #0c3540 55%, #075d5d 100%);
}
.hero::after { content: ""; position: absolute; width: 440px; height: 440px; right: -130px; bottom: -260px; border: 1px solid rgba(255,255,255,.14); border-radius: 50%; box-shadow: 0 0 0 55px rgba(255,255,255,.025), 0 0 0 110px rgba(255,255,255,.02); }
.hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: 1.25fr .75fr; gap: 70px; align-items: center; padding: 72px 0 78px; }
.breadcrumb { margin-bottom: 28px; color: rgba(255,255,255,.62); font-size: 13px; }
.breadcrumb span { margin: 0 8px; }
.eyebrow { display: flex; align-items: center; gap: 10px; margin: 0 0 16px; color: var(--mint); font-size: 13px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 28px; height: 2px; background: var(--cyan); }
h1 { max-width: 780px; margin: 0; font-size: clamp(36px, 5vw, 62px); line-height: 1.13; letter-spacing: -.045em; }
.hero-lede { max-width: 710px; margin: 24px 0 30px; color: rgba(255,255,255,.78); font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; border: 1px solid transparent; border-radius: 12px; font-weight: 750; cursor: pointer; }
.button-primary { color: #062728; background: var(--mint); }
.button-primary:hover { background: #fff; }
.button-ghost { color: #fff; border-color: rgba(255,255,255,.28); background: rgba(255,255,255,.06); }
.button-dark { color: #fff; background: var(--ink); }
.hero-note { margin: 18px 0 0; color: rgba(255,255,255,.55); font-size: 12px; }
.water-orbit { position: relative; width: 300px; height: 300px; margin: auto; display: grid; place-items: center; }
.water-orbit::before, .water-orbit::after { content: ""; position: absolute; inset: 12px; border: 1px solid rgba(188,238,226,.22); border-radius: 50%; }
.water-orbit::after { inset: 48px; border-style: dashed; animation: spin 24s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.drop { width: 126px; height: 164px; display: grid; place-items: center; transform: rotate(45deg); border-radius: 62% 38% 65% 35%; background: linear-gradient(145deg, var(--mint), var(--cyan)); box-shadow: 0 30px 80px rgba(63,214,218,.24); }
.drop strong { transform: rotate(-45deg); color: #07373a; font-size: 30px; }
.orbit-label { position: absolute; padding: 8px 12px; border: 1px solid rgba(255,255,255,.18); border-radius: 999px; background: rgba(255,255,255,.08); color: rgba(255,255,255,.8); font-size: 12px; backdrop-filter: blur(8px); }
.orbit-label.one { top: 20px; right: 6px; }
.orbit-label.two { bottom: 44px; left: -4px; }

.trust-strip { position: relative; z-index: 2; margin-top: -1px; color: #fff; background: #08222e; }
.trust-grid { display: grid; grid-template-columns: repeat(4,1fr); }
.trust-item { padding: 22px 26px; border-right: 1px solid rgba(255,255,255,.1); }
.trust-item:first-child { border-left: 1px solid rgba(255,255,255,.1); }
.trust-item strong { display: block; color: var(--mint); font-size: 21px; }
.trust-item span { color: rgba(255,255,255,.58); font-size: 12px; }

.section { padding: 90px 0; }
.section-white { background: #fff; }
.section-dark { color: #fff; background: #0a2430; }
.section-head { display: grid; grid-template-columns: .75fr 1.25fr; gap: 64px; align-items: end; margin-bottom: 42px; }
.section-kicker { margin: 0 0 9px; color: var(--teal); font-size: 12px; font-weight: 850; letter-spacing: .16em; }
h2 { margin: 0; font-size: clamp(28px, 4vw, 43px); line-height: 1.2; letter-spacing: -.035em; }
.section-head > p { margin: 0; color: var(--muted); }
.section-dark .section-kicker { color: var(--mint); }
.section-dark .section-head > p { color: rgba(255,255,255,.62); }

.decision-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.decision-card { padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); box-shadow: 0 8px 30px rgba(9,38,45,.035); }
.decision-card .number { display: inline-grid; width: 38px; height: 38px; place-items: center; margin-bottom: 32px; border-radius: 50%; color: var(--teal-dark); background: #e6f6f2; font-size: 12px; font-weight: 850; }
.decision-card h3 { margin: 0 0 10px; font-size: 19px; }
.decision-card p { margin: 0; color: var(--muted); font-size: 14px; }

.panel-layout { display: grid; grid-template-columns: 1.4fr .6fr; gap: 22px; align-items: start; }
.table-wrap { overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.test-table { width: 100%; border-collapse: collapse; }
.test-table th, .test-table td { padding: 17px 20px; border-bottom: 1px solid var(--line); text-align: left; font-size: 14px; vertical-align: top; }
.test-table th { color: var(--muted); background: #f1f7f5; font-size: 12px; letter-spacing: .06em; }
.test-table tr:last-child td { border-bottom: 0; }
.tag { display: inline-block; padding: 3px 9px; border-radius: 99px; color: var(--teal-dark); background: #e3f4ef; font-size: 11px; font-weight: 800; }
.advice-card { position: sticky; top: 98px; padding: 28px; border-radius: var(--radius); color: #fff; background: linear-gradient(145deg, #087a72, #06454c); box-shadow: var(--shadow); }
.advice-card h3 { margin: 0 0 10px; font-size: 21px; }
.advice-card p { color: rgba(255,255,255,.7); font-size: 14px; }
.advice-card ul { margin: 18px 0 24px; padding: 0; list-style: none; }
.advice-card li { padding: 9px 0; border-bottom: 1px solid rgba(255,255,255,.12); font-size: 13px; }

.steps { display: grid; grid-template-columns: repeat(5,1fr); gap: 12px; counter-reset: step; }
.step { position: relative; min-height: 205px; padding: 24px 20px; border: 1px solid rgba(255,255,255,.12); border-radius: 18px; background: rgba(255,255,255,.045); }
.step::before { counter-increment: step; content: "0" counter(step); display: block; margin-bottom: 38px; color: var(--mint); font-size: 12px; font-weight: 800; }
.step h3 { margin: 0 0 7px; font-size: 16px; }
.step p { margin: 0; color: rgba(255,255,255,.56); font-size: 13px; }

.sample-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.sample-card { padding: 32px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.sample-card h3 { margin-top: 0; }
.check-list { padding: 0; list-style: none; }
.check-list li { position: relative; padding: 10px 0 10px 30px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.check-list li::before { content: "✓"; position: absolute; left: 0; color: var(--teal); font-weight: 900; }
.notice { margin-top: 18px; padding: 14px 16px; border-left: 3px solid var(--warm); background: #fff8e9; color: #6c542c; font-size: 13px; }

.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
details { border: 1px solid var(--line); border-radius: 16px; background: #fff; }
summary { padding: 20px 22px; cursor: pointer; font-weight: 750; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; float: right; color: var(--teal); font-size: 20px; }
details[open] summary::after { content: "−"; }
details p { margin: 0; padding: 0 22px 22px; color: var(--muted); font-size: 14px; }

.related-links { display: flex; flex-wrap: wrap; gap: 10px; }
.related-links a { padding: 10px 14px; border: 1px solid var(--line); border-radius: 99px; background: #fff; color: var(--muted); font-size: 13px; }
.related-links a:hover { color: var(--teal); border-color: var(--teal); }
.cta-band { display: grid; grid-template-columns: 1fr auto; gap: 28px; align-items: center; padding: 42px; border-radius: 26px; color: #fff; background: linear-gradient(120deg, #086e68, #0a2a38); box-shadow: var(--shadow); }
.cta-band h2 { font-size: 31px; }
.cta-band p { margin: 8px 0 0; color: rgba(255,255,255,.65); }
.cta-band .hero-actions { justify-content: flex-end; }

.site-footer { padding: 58px 0 100px; color: rgba(255,255,255,.64); background: #061821; font-size: 13px; }
.footer-grid { display: grid; grid-template-columns: 1fr .7fr; gap: 70px; }
.site-footer .brand { color: #fff; margin-bottom: 18px; }
.footer-note { max-width: 760px; }
.footer-meta { text-align: right; }
.footer-meta a { display: block; color: #fff; font-size: 18px; font-weight: 800; }
.copyright { margin-top: 30px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.09); font-size: 11px; }
.mobile-contact { display: none; }

.directory-hero { padding: 66px 0; color: #fff; background: linear-gradient(135deg,#081d29,#08746c); }
.directory-hero h1 { max-width: 850px; }
.directory-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
.directory-link { padding: 18px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.directory-link strong { display: block; font-size: 14px; }
.directory-link span { color: var(--muted); font-size: 12px; }
.pagination { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 34px; }
.pagination a, .pagination span { display: grid; min-width: 38px; height: 38px; place-items: center; border: 1px solid var(--line); border-radius: 9px; background: #fff; }
.pagination .current { color: #fff; background: var(--teal); }

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; padding-top: 54px; }
  .water-orbit { display: none; }
  .section-head, .panel-layout, .footer-grid { grid-template-columns: 1fr; gap: 20px; }
  .decision-grid { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: repeat(3,1fr); }
  .advice-card { position: static; }
  .trust-grid { grid-template-columns: 1fr 1fr; }
  .directory-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 680px) {
  .container { width: min(100% - 28px, 1160px); }
  .header-inner { min-height: 64px; }
  .menu-button { display: block; }
  .main-nav { position: absolute; top: 64px; left: 0; right: 0; display: none; padding: 20px; border-bottom: 1px solid var(--line); background: #fff; box-shadow: var(--shadow); }
  .main-nav.is-open { display: grid; }
  .hero-inner { padding: 42px 0 56px; }
  h1 { font-size: 38px; }
  .hero-lede { font-size: 16px; }
  .hero-actions .button { width: 100%; }
  .trust-item { padding: 16px; }
  .trust-item strong { font-size: 17px; }
  .section { padding: 66px 0; }
  .decision-grid, .sample-grid, .faq-list, .directory-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .step { min-height: auto; }
  .step::before { margin-bottom: 18px; }
  .table-wrap { overflow-x: auto; }
  .test-table { min-width: 650px; }
  .cta-band { grid-template-columns: 1fr; padding: 28px; }
  .cta-band .hero-actions { justify-content: flex-start; }
  .footer-meta { text-align: left; }
  .mobile-contact { position: fixed; left: 0; right: 0; bottom: 0; z-index: 30; display: grid; grid-template-columns: 1fr 1fr; padding: 10px 14px calc(10px + env(safe-area-inset-bottom)); gap: 10px; border-top: 1px solid var(--line); background: rgba(255,255,255,.96); backdrop-filter: blur(12px); }
  .mobile-contact a, .mobile-contact button { min-height: 44px; border: 0; border-radius: 10px; font-weight: 800; }
  .mobile-contact a { display: grid; place-items: center; color: #fff; background: var(--ink); }
  .mobile-contact button { color: #fff; background: var(--teal); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .water-orbit::after { animation: none; }
}