:root {
  --ink: #172033;
  --muted: #536174;
  --line: #dfe5ec;
  --surface: #f5f8fb;
  --white: #ffffff;
  --blue: #1677c8;
  --blue-dark: #0d5f9f;
  --blue-soft: #e9f4fc;
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  color: var(--ink);
  background: var(--white);
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-size: 16px; line-height: 1.7; background: var(--white); }
a { color: inherit; text-underline-offset: 4px; }
a:focus-visible { outline: 3px solid #f2a900; outline-offset: 4px; border-radius: 4px; }
.shell { width: min(1120px, calc(100% - 40px)); margin-inline: auto; }
.skip-link { position: fixed; top: 12px; left: 12px; z-index: 100; padding: 10px 14px; background: var(--ink); color: white; transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }

.site-header { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); }
.header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.brand img { display: block; }
.brand span { display: flex; flex-direction: column; line-height: 1.35; }
.brand strong { font-size: 18px; letter-spacing: .02em; }
.brand small { color: var(--muted); font-size: 12px; }
nav { display: flex; align-items: center; gap: 28px; }
nav a, .back-link { color: #334155; font-weight: 600; text-decoration: none; transition: color .18s ease; }
nav a:hover, .back-link:hover { color: var(--blue); }

.hero { padding: 112px 0 96px; border-bottom: 1px solid var(--line); background: linear-gradient(180deg, var(--blue-soft), #fff 82%); }
.hero-inner { max-width: 840px; text-align: center; }
.eyebrow, .section-kicker { margin: 0 0 14px; color: var(--blue-dark); font-size: 14px; font-weight: 800; letter-spacing: .12em; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 24px; font-size: clamp(40px, 6vw, 68px); line-height: 1.18; letter-spacing: -.04em; }
h2 { margin-bottom: 20px; font-size: clamp(30px, 4vw, 44px); line-height: 1.25; letter-spacing: -.025em; }
h3 { margin-bottom: 10px; font-size: 21px; }
.hero-copy, .section-intro { max-width: 720px; margin: 0 auto; color: var(--muted); font-size: 19px; }
.hero-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.button { min-width: 148px; min-height: 48px; display: inline-flex; align-items: center; justify-content: center; padding: 11px 24px; border: 1px solid transparent; border-radius: 8px; font-weight: 800; text-decoration: none; transition: background-color .18s ease, border-color .18s ease, color .18s ease; }
.button-primary { background: var(--blue); color: white; }
.button-primary:hover { background: var(--blue-dark); }
.button-secondary { border-color: #b9c5d2; background: white; color: var(--ink); }
.button-secondary:hover { border-color: var(--blue); color: var(--blue); }
.service-note { max-width: 670px; margin: 28px auto 0; padding-top: 18px; border-top: 1px solid var(--line); color: #4a596c; font-size: 14px; }

.section { padding: 88px 0; }
.section-muted { background: var(--surface); border-block: 1px solid var(--line); }
.section-intro { margin-left: 0; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 42px; }
.feature-card { padding: 30px; border: 1px solid var(--line); border-radius: 12px; background: white; }
.feature-card svg { width: 36px; height: 36px; margin-bottom: 24px; fill: none; stroke: var(--blue); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.feature-card p, .about-copy p, .contact-card p { color: var(--muted); }
.split-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 80px; align-items: start; }
.about-copy p:last-child { margin-bottom: 0; }
.contact-card { display: grid; grid-template-columns: 1fr .9fr; gap: 70px; align-items: center; padding: 44px; border: 1px solid var(--line); border-radius: 14px; }
address { display: grid; gap: 12px; font-style: normal; }
address a { display: flex; flex-direction: column; min-height: 76px; justify-content: center; padding: 12px 18px; border: 1px solid var(--line); border-radius: 8px; text-decoration: none; transition: border-color .18s ease, background-color .18s ease; }
address a:hover { border-color: var(--blue); background: var(--blue-soft); }
address span { color: var(--muted); font-size: 13px; }
address strong { overflow-wrap: anywhere; font-size: 17px; }

.site-footer { padding: 32px 0; border-top: 1px solid var(--line); background: #111827; color: #e5e7eb; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.footer-inner p { margin: 3px 0 0; color: #aeb7c5; font-size: 13px; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 20px; }
.footer-links a, .site-footer > .shell > a { color: #e5e7eb; }

.legal-main { padding: 64px 0 88px; background: var(--surface); }
.legal-card { max-width: 840px; padding: 54px 60px; border: 1px solid var(--line); border-radius: 14px; background: white; }
.legal-card h1 { margin-bottom: 8px; font-size: clamp(36px, 5vw, 52px); }
.legal-date { padding-bottom: 24px; margin-bottom: 32px; border-bottom: 1px solid var(--line); color: var(--muted); }
.legal-card section + section { margin-top: 34px; }
.legal-card h2 { margin-bottom: 12px; font-size: 23px; }
.legal-card p { color: #3e4b5c; }
.legal-card section p:last-child { margin-bottom: 0; }
.legal-card a { color: var(--blue-dark); }

@media (max-width: 760px) {
  .shell { width: min(100% - 28px, 1120px); }
  .site-header { position: static; }
  .header-inner { min-height: 68px; }
  .brand small, nav { display: none; }
  .hero { padding: 72px 0 64px; }
  h1 { font-size: 40px; }
  .hero-copy, .section-intro { font-size: 17px; }
  .section { padding: 64px 0; }
  .feature-grid, .split-layout, .contact-card { grid-template-columns: 1fr; }
  .feature-grid { gap: 14px; }
  .split-layout, .contact-card { gap: 24px; }
  .contact-card { padding: 28px 22px; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
  .footer-links { justify-content: flex-start; gap: 12px 18px; }
  .legal-main { padding: 24px 0 56px; }
  .legal-card { padding: 30px 22px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}