:root {
  --ink: #0b1f3a;
  --muted: #607089;
  --line: #dfe6ef;
  --paper: #ffffff;
  --soft: #f4f7fb;
  --blue: #2f5bea;
  --blue-dark: #2347bc;
  --teal: #10a89a;
  --radius: 18px;
  --shadow: 0 24px 70px rgba(11, 31, 58, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", system-ui, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
.container { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, .92);
  border-bottom: 1px solid rgba(223, 230, 239, .85);
  backdrop-filter: blur(16px);
}
.header-inner { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { font-size: 24px; font-weight: 900; letter-spacing: -.5px; color: var(--ink); }
.nav { display: flex; align-items: center; gap: 30px; color: #42536d; font-size: 14px; }
.nav a:hover, .footer-links a:hover { color: var(--blue); }

.hero {
  position: relative;
  overflow: hidden;
  padding: 96px 0 100px;
  background:
    radial-gradient(circle at 82% 18%, rgba(47, 91, 234, .16), transparent 28%),
    linear-gradient(145deg, #f7faff 0%, #fff 58%, #f1f6ff 100%);
}
.hero::before, .hero::after {
  content: "";
  position: absolute;
  border: 1px solid rgba(47, 91, 234, .12);
  border-radius: 999px;
}
.hero::before { width: 480px; height: 480px; right: -220px; top: -240px; }
.hero::after { width: 240px; height: 240px; left: -120px; bottom: -170px; }
.hero-grid { position: relative; display: grid; grid-template-columns: 1.05fr .75fr; align-items: center; gap: 80px; }
.eyebrow, .kicker { margin: 0 0 16px; color: var(--blue); font-size: 13px; font-weight: 800; letter-spacing: 1.5px; }
.eyebrow { display: flex; align-items: center; gap: 10px; }
.eyebrow span { display: inline-block; width: 30px; height: 2px; background: var(--blue); }
.hero h1 { margin: 0; font-size: clamp(44px, 5vw, 72px); line-height: 1.15; letter-spacing: -3px; }
.hero h1 em { color: var(--blue); font-style: normal; }
.hero-lead { max-width: 660px; margin: 28px 0 0; color: var(--muted); font-size: 18px; }
.hero-actions { display: flex; gap: 14px; margin-top: 34px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 23px; border-radius: 10px; font-size: 14px; font-weight: 800; transition: .2s ease; }
.button.primary { color: #fff; background: var(--blue); box-shadow: 0 12px 28px rgba(47, 91, 234, .24); }
.button.primary:hover { transform: translateY(-2px); background: var(--blue-dark); }
.button.secondary { border: 1px solid var(--line); background: #fff; }
.button.secondary:hover { border-color: var(--blue); color: var(--blue); }
.button.light { color: var(--ink); background: #fff; }
.trust-line { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 34px; color: #63728a; font-size: 13px; }
.trust-line span::before { content: "✓"; margin-right: 7px; color: var(--teal); font-weight: 900; }

.signal-card { padding: 26px; border: 1px solid rgba(255,255,255,.8); border-radius: 24px; background: rgba(255,255,255,.9); box-shadow: var(--shadow); }
.signal-top, .score-row { display: flex; align-items: center; justify-content: space-between; }
.signal-top { padding-bottom: 20px; border-bottom: 1px solid var(--line); font-size: 14px; font-weight: 800; }
.live { color: var(--teal); font-size: 12px; }
.live i { display: inline-block; width: 7px; height: 7px; margin-right: 6px; border-radius: 99px; background: var(--teal); box-shadow: 0 0 0 5px rgba(16,168,154,.12); }
.score-row { padding: 26px 0; }
.score-row small { display: block; color: var(--muted); }
.score-row strong { font-size: 48px; line-height: 1.2; }
.score-row span { color: var(--muted); font-size: 13px; }
.score-ring { display: grid; width: 78px; height: 78px; place-items: center; border-radius: 50%; background: conic-gradient(var(--blue) 0 82%, #e8edf5 82% 100%); }
.score-ring::before { content: ""; grid-area: 1/1; width: 60px; height: 60px; border-radius: 50%; background: #fff; }
.score-ring b { z-index: 1; grid-area: 1/1; }
.metric-grid { display: grid; gap: 16px; }
.metric { display: grid; grid-template-columns: 1fr auto; gap: 6px 20px; font-size: 13px; }
.metric span { color: var(--muted); }
.metric b { color: var(--ink); }
.metric i { position: relative; grid-column: 1 / -1; height: 6px; overflow: hidden; border-radius: 99px; background: #e9eef5; }
.metric i::after { content: ""; position: absolute; inset: 0 auto 0 0; width: var(--w); border-radius: inherit; background: linear-gradient(90deg, var(--blue), #6e8cf1); }
.card-note { margin: 20px 0 0; color: #8490a2; font-size: 11px; }

.section { padding: 100px 0; }
.section.soft { background: var(--soft); }
.section-heading { max-width: 700px; margin-bottom: 48px; }
.section-heading.compact { margin-bottom: 34px; }
.section-heading h2, .principles-grid h2, .cta h2, .page-hero h1 { margin: 0; font-size: clamp(30px, 4vw, 46px); line-height: 1.25; letter-spacing: -1.5px; }
.section-heading > p:last-child, .principles-lead { color: var(--muted); }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.feature-card { min-height: 260px; padding: 30px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; transition: .2s ease; }
.feature-card:hover { transform: translateY(-4px); border-color: #bdcaf5; box-shadow: 0 18px 50px rgba(11,31,58,.08); }
.feature-number { display: block; margin-bottom: 44px; color: var(--blue); font-weight: 900; }
.feature-card h3 { margin: 0 0 12px; font-size: 20px; }
.feature-card p { margin: 0; color: var(--muted); font-size: 14px; }

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin: 0; padding: 0; list-style: none; counter-reset: item; }
.steps li { position: relative; padding: 30px 28px; border-top: 1px solid var(--line); }
.steps li:not(:last-child)::after { content: ""; position: absolute; right: 0; top: 30px; bottom: 30px; width: 1px; background: var(--line); }
.steps li > span { display: grid; width: 36px; height: 36px; margin-bottom: 36px; place-items: center; border-radius: 50%; color: #fff; background: var(--blue); font-weight: 900; }
.steps h3 { margin: 0 0 8px; }
.steps p { margin: 0; color: var(--muted); font-size: 14px; }

.principles-grid { display: grid; grid-template-columns: .85fr 1fr; gap: 100px; align-items: start; }
.principles-lead { margin-top: 22px; }
.principle-list { border-top: 1px solid var(--line); }
.principle-list > div { display: grid; grid-template-columns: 54px 1fr; gap: 18px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.principle-list b { color: var(--blue); }
.principle-list span { color: var(--muted); }
.principle-list strong { display: block; margin-bottom: 3px; color: var(--ink); }

.cta { padding: 70px 0; color: #fff; background: var(--ink); }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.cta p { margin: 0 0 8px; color: #8facff; font-weight: 800; }
.site-footer { padding: 58px 0 26px; background: #f8fafc; }
.footer-inner { display: flex; justify-content: space-between; gap: 40px; }
.footer-brand { display: inline-block; margin-bottom: 8px; }
.footer-inner p { margin: 0; color: var(--muted); font-size: 13px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 22px; color: #4e6078; font-size: 13px; }
.copyright { margin-top: 42px; padding-top: 20px; border-top: 1px solid var(--line); color: #8994a5; font-size: 12px; }

.page-hero { padding: 72px 0 58px; background: linear-gradient(145deg, #f3f7ff, #fff); border-bottom: 1px solid var(--line); }
.page-hero p { max-width: 720px; margin: 18px 0 0; color: var(--muted); }
.legal { max-width: 860px; padding-top: 70px; padding-bottom: 90px; }
.legal .updated { margin: 0 0 36px; color: #7a879a; font-size: 13px; }
.legal h2 { margin: 42px 0 12px; font-size: 24px; }
.legal h3 { margin: 26px 0 8px; font-size: 18px; }
.legal p, .legal li { color: #53647a; }
.legal ul { padding-left: 20px; }
.notice { margin: 34px 0; padding: 20px 22px; border-left: 4px solid var(--blue); background: var(--soft); color: #455872; }
.about-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 34px; }
.about-card { padding: 24px; border: 1px solid var(--line); border-radius: 14px; }
.about-card h3 { margin-top: 0; }

@media (max-width: 900px) {
  .nav { display: none; }
  .hero { padding: 72px 0; }
  .hero-grid, .principles-grid { grid-template-columns: 1fr; gap: 50px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .steps li:nth-child(2)::after { display: none; }
  .about-cards { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .container { width: min(100% - 28px, 1160px); }
  .header-inner { min-height: 62px; }
  .brand { font-size: 21px; }
  .hero h1 { font-size: 40px; letter-spacing: -2px; }
  .hero-lead { font-size: 16px; }
  .hero-actions, .cta-inner, .footer-inner { align-items: stretch; flex-direction: column; }
  .button { width: 100%; }
  .feature-grid, .steps { grid-template-columns: 1fr; }
  .steps li::after { display: none; }
  .section { padding: 72px 0; }
  .feature-card { min-height: auto; }
  .feature-number { margin-bottom: 28px; }
}