:root {
  --ink: #202634;
  --ink-soft: #536071;
  --muted: #7c8795;
  --line: #e7e9ee;
  --paper: #ffffff;
  --soft: #f7f8fa;
  --warm: #fff8f5;
  --coral: #d94d67;
  --coral-dark: #af304d;
  --blue: #365ca8;
  --green: #4b8a72;
  --gold: #b47a2c;
  --shadow: 0 22px 60px rgba(39, 46, 63, 0.09);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.7;
  letter-spacing: 0;
}

a { color: inherit; text-decoration: none; }

.container { width: min(1120px, calc(100% - 48px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid rgba(231, 233, 238, 0.95);
  backdrop-filter: blur(14px);
}

.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 76px; gap: 28px; }

.brand { display: inline-flex; align-items: center; gap: 12px; min-width: 0; }

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  color: #fff;
  background: var(--coral);
  border-radius: 50%;
  font-size: 16px;
  font-weight: 700;
  box-shadow: 0 8px 18px rgba(217, 77, 103, 0.2);
}

.brand-copy { display: grid; gap: 1px; }
.brand-copy strong { font-size: 17px; line-height: 1.2; letter-spacing: 0.02em; }
.brand-copy small { color: var(--muted); font-size: 11px; line-height: 1.3; }

.site-nav { display: flex; align-items: center; gap: 26px; color: var(--ink-soft); font-size: 13px; }
.site-nav a { padding: 8px 0; border-bottom: 1px solid transparent; }
.site-nav a:hover, .site-nav a:focus-visible { color: var(--coral-dark); border-color: var(--coral); }

.hero { overflow: hidden; background: var(--warm); border-bottom: 1px solid #f0e3df; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr); gap: 80px; align-items: center; min-height: 640px; padding: 76px 0 84px; }
.hero-copy { max-width: 630px; }
.eyebrow, .section-label { margin: 0 0 14px; color: var(--coral-dark); font-size: 12px; font-weight: 700; letter-spacing: 0.14em; }
.eyebrow { text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 600px; margin-bottom: 20px; font-size: clamp(38px, 5vw, 64px); line-height: 1.12; letter-spacing: 0; font-weight: 760; }
.hero-lead { max-width: 580px; margin-bottom: 30px; color: var(--ink-soft); font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 36px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 0 20px; border-radius: 5px; font-size: 13px; font-weight: 700; transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease; }
.button:hover { transform: translateY(-1px); }
.button-primary { color: #fff; background: var(--coral); box-shadow: 0 10px 24px rgba(217, 77, 103, 0.18); }
.button-primary:hover { background: var(--coral-dark); }
.button-secondary { color: var(--blue); background: transparent; border: 1px solid #b9c8e6; }
.button-secondary:hover { background: #eef3fc; }
.button-light { color: var(--ink); background: #fff; box-shadow: 0 8px 20px rgba(31, 42, 64, 0.13); }
.trust-list { display: flex; flex-wrap: wrap; gap: 15px 24px; padding: 0; margin: 0; list-style: none; color: var(--ink-soft); font-size: 12px; }
.trust-list li { display: inline-flex; align-items: center; gap: 8px; }
.trust-dot { width: 7px; height: 7px; border-radius: 50%; }
.trust-dot-coral { background: var(--coral); }
.trust-dot-blue { background: var(--blue); }
.trust-dot-green { background: var(--green); }

.product-visual { position: relative; display: grid; justify-items: center; align-self: stretch; padding: 10px 0; }
.visual-kicker { align-self: start; justify-self: end; color: var(--muted); font-size: 11px; letter-spacing: 0.1em; }
.phone-frame { width: min(250px, 72vw); margin-top: 8px; padding: 10px; background: #252a34; border: 1px solid #404753; border-radius: 28px; box-shadow: var(--shadow); }
.phone-frame img { display: block; width: 100%; height: auto; border-radius: 19px; }
.visual-caption { max-width: 290px; margin: 17px 0 0; color: var(--muted); font-size: 11px; text-align: center; }

.section { padding: 102px 0; }
.section-paper { background: var(--paper); }
.section-soft { background: var(--soft); border-top: 1px solid #eef0f3; border-bottom: 1px solid #eef0f3; }
.section-heading { max-width: 560px; margin-bottom: 42px; }
.section-heading-wide { max-width: 680px; }
.section-heading h2 { margin-bottom: 13px; font-size: clamp(28px, 4vw, 43px); line-height: 1.2; letter-spacing: 0; }
.section-heading > p:last-child { margin-bottom: 0; color: var(--ink-soft); font-size: 15px; }

.company-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr); gap: 34px; align-items: stretch; }
.company-facts { margin: 0; border-top: 1px solid var(--line); }
.fact-row { display: grid; grid-template-columns: 185px minmax(0, 1fr); gap: 24px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.fact-row dt { color: var(--muted); font-size: 13px; }
.fact-row dd { margin: 0; color: var(--ink); font-size: 15px; font-weight: 650; }
.verification-panel { display: flex; flex-direction: column; justify-content: center; min-height: 300px; padding: 34px; color: #fff; background: var(--blue); border-radius: 8px; box-shadow: 0 22px 45px rgba(54, 92, 168, 0.2); }
.panel-tag { color: #dce7ff; font-size: 11px; letter-spacing: 0.12em; }
.verification-panel h3 { margin: 18px 0 14px; font-size: 25px; line-height: 1.25; }
.verification-panel p { margin-bottom: 0; color: #e4ebfb; font-size: 13px; }
.panel-rule { width: 100%; height: 1px; margin: 26px 0 17px; background: rgba(255, 255, 255, 0.24); }
.verification-panel .panel-note { color: #fff; font-weight: 650; }

.service-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 62px; border-top: 1px solid var(--line-strong); }
.service-item { display: grid; grid-template-columns: 42px minmax(0, 1fr); gap: 20px; padding: 28px 0 30px; border-bottom: 1px solid var(--line-strong); }
.service-index { color: var(--coral); font-size: 13px; font-weight: 750; }
.service-item h3 { margin-bottom: 7px; font-size: 18px; }
.service-item p { margin-bottom: 0; color: var(--ink-soft); font-size: 13px; }

.governance-grid { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: 90px; align-items: start; }
.governance-points { display: grid; gap: 0; border-top: 1px solid var(--line); }
.governance-point { display: grid; grid-template-columns: 42px minmax(0, 1fr); gap: 18px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.point-icon { display: grid; place-items: center; width: 32px; height: 32px; margin-top: 1px; border-radius: 50%; font-size: 10px; font-weight: 800; }
.point-icon-coral { color: var(--coral-dark); background: #fbe8ec; }
.point-icon-blue { color: var(--blue); background: #e9effb; }
.point-icon-green { color: var(--green); background: #e8f3ef; }
.point-icon-gold { color: var(--gold); background: #fbf0de; }
.governance-point strong { display: block; margin-bottom: 5px; font-size: 16px; }
.governance-point p { margin-bottom: 0; color: var(--ink-soft); font-size: 13px; }

.policy-grid { display: grid; grid-template-columns: minmax(0, 0.75fr) minmax(0, 1.25fr); gap: 90px; align-items: start; }
.policy-list { border-top: 1px solid var(--line); }
details { padding: 20px 0; border-bottom: 1px solid var(--line); }
summary { cursor: pointer; list-style: none; font-size: 15px; font-weight: 700; }
summary::-webkit-details-marker { display: none; }
summary::after { float: right; color: var(--coral); content: "+"; font-size: 20px; font-weight: 400; line-height: 1; }
details[open] summary::after { content: "-"; }
details p { max-width: 650px; margin: 12px 24px 0 0; color: var(--ink-soft); font-size: 13px; }

.contact-band { color: #fff; background: var(--coral-dark); }
.contact-inner { display: flex; align-items: center; justify-content: space-between; gap: 36px; padding: 68px 0; }
.contact-band .section-label { color: #ffd9e0; }
.contact-band h2 { margin-bottom: 10px; font-size: 34px; line-height: 1.2; }
.contact-band p:last-child { max-width: 650px; margin-bottom: 0; color: #f8dfe4; font-size: 14px; }

.site-footer { background: #202634; color: #bac1cd; }
.footer-inner { display: flex; flex-wrap: wrap; gap: 10px 28px; padding: 24px 0; font-size: 11px; }

@media (max-width: 820px) {
  .container { width: min(100% - 34px, 620px); }
  .site-nav { display: none; }
  .hero-grid, .company-grid, .governance-grid, .policy-grid { grid-template-columns: 1fr; gap: 42px; }
  .hero-grid { padding: 62px 0 70px; }
  .product-visual { min-height: 410px; }
  .visual-kicker { justify-self: center; }
  .section { padding: 72px 0; }
  .section-heading { margin-bottom: 32px; }
  .service-list { grid-template-columns: 1fr; }
  .governance-grid, .policy-grid { gap: 30px; }
  .contact-inner { align-items: flex-start; flex-direction: column; padding: 54px 0; }
}

@media (max-width: 520px) {
  h1 { font-size: 39px; }
  .hero-lead { font-size: 15px; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .button { width: 100%; }
  .trust-list { display: grid; gap: 9px; }
  .fact-row { grid-template-columns: 1fr; gap: 3px; padding: 15px 0; }
  .verification-panel { min-height: 0; padding: 27px; }
  .contact-band h2 { font-size: 29px; }
}