:root {
  --primary: #0f4c81;
  --primary-dark: #082f57;
  --accent: #14b8d4;
  --text: #172033;
  --muted: #64748b;
  --bg: #f7fbff;
  --card: #ffffff;
  --border: #e5edf5;
  --shadow: 0 18px 45px rgba(15, 76, 129, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  color: var(--text);
  background: #fff;
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.navbar { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.logo { display: flex; align-items: center; gap: 12px; font-weight: 800; }
.logo-mark {
  width: 42px; height: 42px; border-radius: 14px;
  display: grid; place-items: center;
  color: #fff; background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 10px 24px rgba(20,184,212,.24);
}
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-text small { font-weight: 600; color: var(--muted); font-size: 12px; }
.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-links a { padding: 8px 14px; border-radius: 999px; color: #334155; font-weight: 600; }
.nav-links a:hover, .nav-links a.active { background: #eaf6ff; color: var(--primary); }
.menu-toggle { display: none; border: 0; background: #eef7ff; color: var(--primary); border-radius: 10px; padding: 8px 10px; font-size: 22px; cursor: pointer; }

.hero {
  position: relative; overflow: hidden;
  background: radial-gradient(circle at 20% 20%, rgba(20,184,212,.18), transparent 35%), linear-gradient(135deg, #f6fbff 0%, #ffffff 55%, #eef8ff 100%);
  padding: 92px 0 72px;
}
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 54px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; padding: 7px 14px; border: 1px solid #ccefff; background: #f0fbff; color: #0f7490; border-radius: 999px; font-weight: 700; font-size: 14px; }
h1 { font-size: clamp(34px, 5vw, 58px); line-height: 1.15; margin: 20px 0 18px; letter-spacing: -1px; }
.hero p { font-size: 18px; color: var(--muted); margin: 0 0 28px; max-width: 660px; }
.hero-actions, .cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 20px; border-radius: 12px; border: 1px solid transparent; font-weight: 800; transition: .2s ease; cursor: pointer; }
.btn-primary { color: #fff; background: linear-gradient(135deg, var(--primary), var(--accent)); box-shadow: 0 14px 28px rgba(15,76,129,.18); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 18px 34px rgba(15,76,129,.24); }
.btn-outline { color: var(--primary); border-color: #bddff4; background: #fff; }
.btn-outline:hover { background: #eef8ff; transform: translateY(-2px); }
.hero-card { background: rgba(255,255,255,.86); border: 1px solid var(--border); box-shadow: var(--shadow); border-radius: 28px; padding: 28px; }
.hero-card h3 { margin-top: 0; font-size: 24px; }
.hero-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 16px; }
.hero-list li { display: flex; gap: 12px; align-items: flex-start; }
.check { flex: 0 0 24px; height: 24px; border-radius: 50%; background: #dff7fb; color: #0891b2; display: grid; place-items: center; font-weight: 900; }

.section { padding: 76px 0; }
.section-alt { background: var(--bg); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 42px; }
.section-head h2, .page-title h1 { margin: 0 0 12px; font-size: clamp(28px, 4vw, 42px); line-height: 1.2; }
.section-head p, .page-title p { color: var(--muted); margin: 0; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 22px; padding: 26px; box-shadow: 0 12px 30px rgba(15,76,129,.06); transition: .2s ease; }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.icon { width: 46px; height: 46px; border-radius: 15px; display: grid; place-items: center; font-size: 23px; background: #eaf6ff; margin-bottom: 16px; }
.card h3 { margin: 0 0 10px; font-size: 22px; }
.card p { color: var(--muted); margin: 0; }
.feature-list { display: grid; gap: 14px; }
.feature-item { display: flex; gap: 14px; align-items: flex-start; padding: 18px; border-radius: 18px; background: #fff; border: 1px solid var(--border); }
.step { position: relative; }
.step-num { width: 42px; height: 42px; border-radius: 50%; display: grid; place-items: center; background: linear-gradient(135deg, var(--primary), var(--accent)); color: #fff; font-weight: 900; margin-bottom: 14px; }

.page-hero { background: linear-gradient(135deg, #f6fbff, #eef8ff); padding: 70px 0 56px; border-bottom: 1px solid var(--border); }
.page-title { max-width: 820px; }
.business-block { display: grid; grid-template-columns: 280px 1fr; gap: 28px; align-items: start; margin-bottom: 24px; }
.business-block .label { color: var(--primary); font-weight: 900; }
.bullet-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 18px; }
.bullet { padding: 10px 12px; background: #f7fbff; border: 1px solid var(--border); border-radius: 12px; color: #334155; }
.info-box { background: #fff; border: 1px solid var(--border); border-radius: 22px; padding: 26px; }
.info-row { display: grid; grid-template-columns: 110px 1fr; gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--border); }
.info-row:last-child { border-bottom: 0; }
.info-row strong { color: var(--primary); }
.contact-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 28px; }
.contact-card { background: #fff; border: 1px solid var(--border); border-radius: 24px; padding: 28px; box-shadow: var(--shadow); }
.form { display: grid; gap: 14px; }
.form label { font-weight: 700; color: #334155; }
.form input, .form textarea, .form select { width: 100%; padding: 13px 14px; border: 1px solid #d8e5ef; border-radius: 12px; font: inherit; outline: none; }
.form input:focus, .form textarea:focus, .form select:focus { border-color: var(--accent); box-shadow: 0 0 0 4px rgba(20,184,212,.12); }
.notice { padding: 12px 14px; border-radius: 12px; background: #f0fbff; color: #0f7490; font-size: 14px; }
.cta { background: linear-gradient(135deg, var(--primary-dark), var(--primary)); color: #fff; border-radius: 30px; padding: 44px; display: flex; justify-content: space-between; gap: 20px; align-items: center; }
.cta p { color: #dbeafe; margin: 6px 0 0; }
.site-footer { background: #071f3a; color: #dbeafe; padding: 42px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 24px; }
.site-footer h3, .site-footer h4 { color: #fff; margin-top: 0; }
.site-footer p, .site-footer a { color: #b9d4ef; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 28px; padding-top: 18px; color: #98b8d5; font-size: 14px; }
.back-to-top { position: fixed; right: 20px; bottom: 20px; width: 44px; height: 44px; border: 0; border-radius: 50%; background: var(--primary); color: #fff; cursor: pointer; box-shadow: var(--shadow); display: none; }
.back-to-top.show { display: grid; place-items: center; }
.fade-in { opacity: 0; transform: translateY(18px); transition: .6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 860px) {
  .menu-toggle { display: block; }
  .nav-links { position: absolute; top: 72px; left: 0; right: 0; padding: 14px 20px 20px; background: #fff; border-bottom: 1px solid var(--border); flex-direction: column; align-items: stretch; display: none; }
  .nav-links.open { display: flex; }
  .hero { padding: 58px 0; }
  .hero-grid, .grid-3, .grid-2, .business-block, .contact-layout, .footer-grid { grid-template-columns: 1fr; }
  .cta { flex-direction: column; align-items: flex-start; padding: 30px; }
  .bullet-grid { grid-template-columns: 1fr; }
  .info-row { grid-template-columns: 1fr; gap: 4px; }
}

@media (max-width: 520px) {
  .container { width: min(100% - 28px, 1120px); }
  .logo-text span { font-size: 14px; }
  .logo-text small { display: none; }
  .hero-actions, .cta-actions { flex-direction: column; width: 100%; }
  .btn { width: 100%; }
  .section { padding: 56px 0; }
}