:root {
  --ink: #102033;
  --ink-2: #1f3348;
  --blue: #2467e8;
  --cyan: #19a7a2;
  --paper: #f7f9fc;
  --white: #ffffff;
  --muted: #66778a;
  --line: #dbe4ee;
  --dark: #10243a;
  --dark-line: #29425b;
  --focus: #f2a23b;
  --shadow: 0 18px 50px rgba(31, 58, 92, .10);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
a:focus-visible, .button:focus-visible { outline: 3px solid var(--focus); outline-offset: 4px; }
.shell { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(219, 228, 238, .9);
  background: rgba(247, 249, 252, .94);
  backdrop-filter: blur(14px);
}
.header-inner { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 800; letter-spacing: .12em; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px 3px 9px 3px;
  background: var(--ink);
  color: var(--white);
  letter-spacing: 0;
}
.nav { display: flex; gap: 28px; color: var(--ink-2); font-size: 14px; }
.nav a { text-decoration: none; }
.nav a:hover { color: var(--blue); }

.hero { padding: 86px 0 76px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(420px, .95fr); gap: 68px; align-items: center; }
.eyebrow { margin: 0 0 14px; color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .19em; }
.eyebrow.light { color: #76d9d2; }
h1, h2, h3 { margin-top: 0; line-height: 1.18; letter-spacing: -.025em; }
.hero h1 { max-width: 760px; margin-bottom: 26px; font-family: "STKaiti", "KaiTi", serif; font-size: clamp(46px, 6vw, 78px); font-weight: 700; }
.lead { max-width: 700px; margin: 0; color: var(--ink-2); font-size: 18px; line-height: 1.9; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; padding: 0 22px; border: 1px solid transparent; border-radius: 8px; text-decoration: none; font-weight: 700; }
.button.primary { background: var(--ink); color: var(--white); }
.button.primary:hover { background: var(--blue); }
.button.secondary { border-color: var(--line); background: var(--white); color: var(--ink); }
.hero-note { margin: 24px 0 0; color: var(--muted); font-size: 12px; }

.signal-board { position: relative; padding: 22px; border: 1px solid var(--line); border-radius: 18px; background: var(--white); box-shadow: var(--shadow); }
.signal-board::after { content: ""; position: absolute; right: -36px; bottom: 48px; width: 150px; height: 12px; border-top: 2px solid var(--cyan); border-bottom: 2px solid var(--blue); transform: rotate(-7deg); opacity: .35; }
.signal-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-bottom: 18px; border-bottom: 1px solid var(--line); font-size: 13px; font-weight: 800; }
.status { color: var(--cyan); font-weight: 700; }
.status i { display: inline-block; width: 8px; height: 8px; margin-right: 6px; border-radius: 50%; background: currentColor; box-shadow: 0 0 0 5px rgba(25, 167, 162, .10); }
.signal-flow { list-style: none; margin: 0; padding: 8px 0 0; }
.signal-flow li { position: relative; display: grid; grid-template-columns: 58px 1fr; grid-template-rows: auto auto; column-gap: 14px; padding: 18px 0; border-bottom: 1px solid #edf2f7; }
.signal-flow li:last-child { border-bottom: 0; }
.signal-flow li:not(:last-child)::after { content: ""; position: absolute; left: 28px; bottom: -10px; width: 1px; height: 20px; background: var(--blue); }
.signal-flow .node { grid-row: 1 / 3; align-self: start; display: grid; place-items: center; width: 58px; height: 32px; border-radius: 6px; background: #eef4ff; color: var(--blue); font-size: 12px; font-weight: 800; }
.signal-flow strong { font-size: 15px; }
.signal-flow small { margin-top: 3px; color: var(--muted); }

.section { padding: 90px 0; }
.section.compact { padding: 58px 0; }
.section-heading { display: grid; grid-template-columns: 1fr 1.45fr; column-gap: 72px; margin-bottom: 34px; }
.section-heading .eyebrow { grid-column: 1 / -1; }
.section-heading h2, .about-grid h2, .trust-grid h2, .policy-strip h2 { margin-bottom: 0; font-size: clamp(32px, 4vw, 48px); }
.section-heading p:last-child { margin: 0; color: var(--muted); }
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.service-card { min-height: 282px; padding: 28px; border: 1px solid var(--line); border-radius: 14px; background: var(--white); }
.service-tag { color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .08em; }
.service-card h3 { margin: 58px 0 12px; font-size: 23px; }
.service-card p { margin: 0; color: var(--muted); font-size: 14px; }

.section-dark { background: var(--dark); color: var(--white); }
.trust-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 80px; }
.trust-list { border-top: 1px solid var(--dark-line); }
.trust-list div { display: grid; grid-template-columns: 150px 1fr; gap: 24px; padding: 22px 0; border-bottom: 1px solid var(--dark-line); }
.trust-list span { color: #bdd0df; }

.about-grid { display: grid; grid-template-columns: .75fr 1.25fr; gap: 90px; }
.about-copy { font-size: 18px; }
.about-copy p { margin: 0 0 18px; }
.about-copy p:last-child { margin-bottom: 0; color: var(--muted); }
.policy-strip { display: flex; align-items: end; justify-content: space-between; gap: 40px; padding-top: 34px; border-top: 1px solid var(--line); }
.policy-strip h2 { font-size: 30px; }
.policy-strip p { margin-bottom: 0; color: var(--muted); }
.policy-links { display: flex; gap: 12px; }
.policy-links a { min-width: 112px; padding: 12px 16px; border: 1px solid var(--line); border-radius: 7px; background: var(--white); text-align: center; text-decoration: none; font-weight: 700; }
.policy-links a:hover { border-color: var(--blue); color: var(--blue); }

.policy-page { padding: 72px 0 96px; }
.policy-article { max-width: 860px; padding: 58px 64px; border: 1px solid var(--line); border-radius: 16px; background: var(--white); box-shadow: 0 10px 34px rgba(31, 58, 92, .06); }
.policy-article h1 { margin-bottom: 8px; font-family: "STKaiti", "KaiTi", serif; font-size: clamp(42px, 6vw, 66px); }
.policy-date { margin: 0 0 36px; color: var(--muted); font-size: 13px; }
.policy-article h2 { margin: 38px 0 12px; font-size: 21px; }
.policy-article p { color: var(--ink-2); }

.site-footer { padding: 38px 0; border-top: 1px solid var(--line); background: #eef3f8; }
.footer-inner { display: flex; justify-content: space-between; gap: 36px; color: var(--muted); font-size: 12px; }
.footer-inner strong { color: var(--ink); font-size: 14px; }
.footer-inner p { margin: 4px 0 0; }
.footer-meta { display: flex; max-width: 620px; flex-direction: column; align-items: flex-end; gap: 6px; text-align: right; }
.footer-meta a { color: var(--ink-2); }

@media (max-width: 860px) {
  .nav { gap: 16px; }
  .nav a:nth-child(2), .nav a:nth-child(3) { display: none; }
  .hero { padding-top: 58px; }
  .hero-grid, .section-heading, .trust-grid, .about-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero h1 { font-size: clamp(42px, 12vw, 64px); }
  .service-grid { grid-template-columns: 1fr; }
  .service-card { min-height: 0; }
  .service-card h3 { margin-top: 30px; }
  .policy-strip { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 560px) {
  .shell { width: min(100% - 28px, 1160px); }
  .header-inner { min-height: 64px; }
  .nav a:not(:last-child) { display: none; }
  .hero { padding: 44px 0 58px; }
  .hero-grid { gap: 42px; }
  .lead { font-size: 16px; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .button { width: 100%; }
  .signal-board { padding: 18px; border-radius: 13px; }
  .section { padding: 68px 0; }
  .trust-list div { grid-template-columns: 1fr; gap: 4px; }
  .policy-links { width: 100%; }
  .policy-links a { flex: 1; }
  .policy-article { padding: 34px 24px; border-radius: 12px; }
  .footer-inner { flex-direction: column; }
  .footer-meta { align-items: flex-start; text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}