:root {
  --ink: #14213d;
  --ink-muted: #59677d;
  --paper: #ffffff;
  --mist: #f5f8fc;
  --line: #e1e8f0;
  --brand: #1b4d89;
  --brand-dark: #102c54;
  --accent: #bf8737;
  --shadow: 0 18px 45px rgba(16, 44, 84, .10);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: var(--mist);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }

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

.site-header {
  position: relative;
  z-index: 2;
  height: 76px;
  border-bottom: 1px solid rgba(225, 232, 240, .78);
  background: rgba(255, 255, 255, .9);
  backdrop-filter: blur(12px);
}
.header-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 700; letter-spacing: .04em; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 31px;
  height: 31px;
  color: white;
  font-family: Georgia, serif;
  font-size: 17px;
  line-height: 1;
  background: var(--brand);
  border-radius: 9px 9px 9px 2px;
}
.brand-name { font-size: 17px; }
.site-nav { display: flex; align-items: center; gap: 26px; color: #4e5b70; font-size: 14px; }
.site-nav a { transition: color .2s ease; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--brand); }

.hero { position: relative; padding: 112px 0 92px; background: linear-gradient(135deg, #fbfdff 0%, #edf4fc 100%); }
.hero::before, .hero::after { position: absolute; content: ""; border-radius: 50%; pointer-events: none; }
.hero::before { width: 480px; height: 480px; top: -268px; right: -90px; border: 1px solid rgba(27, 77, 137, .11); box-shadow: 0 0 0 72px rgba(27, 77, 137, .035), 0 0 0 144px rgba(27, 77, 137, .025); }
.hero::after { width: 10px; height: 10px; right: 12%; bottom: 18%; background: var(--accent); box-shadow: 28px -28px 0 rgba(191,135,55,.43), -27px 44px 0 rgba(27,77,137,.2); }
.hero-content { position: relative; z-index: 1; max-width: 760px; }
.eyebrow { margin: 0 0 22px; color: var(--brand); font-size: 13px; font-weight: 700; letter-spacing: .13em; }
.hero h1 { max-width: 670px; margin: 0; font-family: Georgia, "Songti SC", serif; font-size: clamp(42px, 6vw, 70px); font-weight: 500; line-height: 1.12; letter-spacing: -.045em; }
.hero h1 strong { display: block; color: var(--brand); font-weight: inherit; }
.hero-lead { max-width: 655px; margin: 30px 0 0; color: var(--ink-muted); font-size: 18px; line-height: 1.85; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 13px; margin-top: 38px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 20px; border: 1px solid var(--brand); border-radius: 5px; font-size: 14px; font-weight: 700; transition: transform .2s ease, background .2s ease, color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: var(--brand); }
.button-primary:hover { background: var(--brand-dark); }
.button-secondary { color: var(--brand); background: rgba(255,255,255,.6); }
.button-secondary:hover { background: #fff; }

.section { padding: 88px 0; }
.section-kicker { margin: 0 0 13px; color: var(--accent); font-size: 12px; font-weight: 700; letter-spacing: .14em; }
.section-title { margin: 0; font-family: Georgia, "Songti SC", serif; font-size: clamp(30px, 4vw, 43px); font-weight: 500; letter-spacing: -.035em; }
.section-intro { max-width: 625px; margin: 20px 0 0; color: var(--ink-muted); font-size: 16px; line-height: 1.85; }
.capability-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 42px; }
.capability { min-height: 220px; padding: 31px 28px; border: 1px solid var(--line); background: var(--paper); box-shadow: 0 10px 30px rgba(24, 54, 92, .035); }
.capability-number { color: var(--accent); font-family: Georgia, serif; font-size: 15px; }
.capability h3 { margin: 48px 0 11px; font-size: 19px; font-weight: 700; }
.capability p { margin: 0; color: var(--ink-muted); font-size: 14px; line-height: 1.8; }
.principle-band { padding: 68px 0; background: var(--brand-dark); color: #fff; }
.principle-grid { display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr); gap: 80px; align-items: center; }
.principle-band .section-kicker { color: #e1b86e; }
.principle-band .section-title { max-width: 430px; }
.principle-text { color: rgba(255,255,255,.72); font-size: 16px; line-height: 1.9; }
.principle-list { display: grid; gap: 17px; margin: 25px 0 0; padding: 0; list-style: none; color: rgba(255,255,255,.88); font-size: 14px; }
.principle-list li { display: flex; gap: 13px; align-items: baseline; }
.principle-list span { color: #e1b86e; font-family: Georgia, serif; }

.page-main { min-height: calc(100vh - 76px); padding: 80px 0 88px; }
.page-heading { max-width: 760px; margin-bottom: 42px; }
.page-heading h1 { margin: 0; font-family: Georgia, "Songti SC", serif; font-size: clamp(36px, 5vw, 54px); font-weight: 500; letter-spacing: -.04em; }
.page-heading p { margin: 18px 0 0; color: var(--ink-muted); font-size: 16px; line-height: 1.8; }
.document { max-width: 820px; padding: 46px 52px; border: 1px solid var(--line); background: #fff; box-shadow: var(--shadow); }
.document h2 { margin: 38px 0 12px; font-size: 18px; }
.document h2:first-child { margin-top: 0; }
.document p { margin: 0 0 18px; color: #4f5d72; font-size: 15px; line-height: 1.95; }
.document .back-link { display: inline-flex; margin-top: 16px; color: var(--brand); font-size: 14px; font-weight: 700; }
.document .back-link::before { content: "←"; margin-right: 8px; }
.callback-card { max-width: 710px; padding: 54px; border: 1px solid var(--line); background: #fff; box-shadow: var(--shadow); }
.status-mark { width: 49px; height: 49px; display: grid; place-items: center; color: var(--brand); border: 1px solid #c9d9ed; border-radius: 50%; font-size: 20px; }
.callback-card h2 { margin: 24px 0 14px; font-family: Georgia, "Songti SC", serif; font-size: 31px; font-weight: 500; }
.callback-card p { max-width: 550px; margin: 0; color: var(--ink-muted); font-size: 15px; line-height: 1.9; }
.callback-card .back-link { display: inline-flex; margin-top: 30px; color: var(--brand); font-size: 14px; font-weight: 700; }
.callback-card .back-link::before { content: "←"; margin-right: 8px; }

.site-footer { border-top: 1px solid var(--line); background: #fff; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 20px; min-height: 86px; color: #718096; font-size: 13px; }
.footer-inner a { transition: color .2s ease; }
.footer-inner a:hover { color: var(--brand); }

@media (max-width: 720px) {
  .container { width: min(100% - 36px, 1120px); }
  .site-header { height: auto; }
  .header-inner { min-height: 68px; flex-wrap: wrap; padding: 16px 0; gap: 12px; }
  .site-nav { gap: 16px; font-size: 13px; }
  .hero { padding: 78px 0 75px; }
  .hero h1 { font-size: 44px; }
  .hero-lead { font-size: 16px; }
  .capability-grid, .principle-grid { grid-template-columns: 1fr; }
  .capability { min-height: auto; }
  .principle-grid { gap: 29px; }
  .section { padding: 62px 0; }
  .page-main { padding: 56px 0 64px; }
  .document, .callback-card { padding: 31px 24px; }
  .footer-inner { align-items: flex-start; flex-direction: column; justify-content: center; padding: 18px 0; }
}