:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --text: #0f172a;
  --muted: #64748b;
  --bg: #f8fafc;
  --white: #fff;
  --border: #e2e8f0;
  --gradient: linear-gradient(135deg, #1e3a8a 0%, #2563eb 55%, #0ea5e9 100%);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; }
.logo-icon {
  width: 36px; height: 36px; border-radius: 10px; background: var(--gradient);
  color: #fff; display: flex; align-items: center; justify-content: center; font-size: 14px;
}
nav { display: flex; gap: 24px; flex-wrap: wrap; }
nav a { color: var(--muted); font-size: 15px; }
nav a:hover { color: var(--primary); }
.hero { background: var(--gradient); color: #fff; padding: 72px 0 80px; }
.hero-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 40px; align-items: start; }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } nav { display: none; } }
.badge {
  display: inline-block; padding: 6px 14px; border-radius: 999px;
  background: rgba(255,255,255,.15); border: 1px solid rgba(255,255,255,.25); font-size: 13px; margin-bottom: 18px;
}
.hero h1 { font-size: clamp(30px, 4vw, 44px); line-height: 1.25; margin-bottom: 16px; }
.hero p { font-size: 17px; opacity: .95; max-width: 640px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 22px; border-radius: 10px; font-size: 15px; font-weight: 600;
}
.btn-primary { background: #fff; color: var(--primary-dark); }
.btn-outline { border: 1px solid rgba(255,255,255,.55); color: #fff; }
.btn-light { background: #fff; color: var(--primary-dark); }
.hero-panel {
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.22);
  border-radius: 16px; padding: 24px;
}
.hero-panel h3 { margin-bottom: 16px; font-size: 18px; }
.hero-panel li {
  display: flex; justify-content: space-between; gap: 12px;
  padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.15); font-size: 14px;
}
.hero-panel li:last-child { border-bottom: none; }
.hero-panel span { opacity: .9; white-space: nowrap; }
.hero-note { margin-top: 14px; font-size: 13px; opacity: .85; }
.section { padding: 72px 0; }
.section.bg-white { background: var(--white); }
.section-head { text-align: center; margin-bottom: 40px; }
.section-head h2 { font-size: 30px; margin-bottom: 10px; }
.section-head p { color: var(--muted); max-width: 640px; margin: 0 auto; }
.cards { display: grid; gap: 24px; }
.cols-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 900px) { .cols-3 { grid-template-columns: 1fr; } }
.card, .case-card, .info-card {
  background: var(--white); border: 1px solid var(--border); border-radius: 16px; padding: 28px;
  box-shadow: 0 4px 20px rgba(15,23,42,.04);
}
.card { position: relative; }
.card-tag {
  position: absolute; top: 16px; right: 16px; background: #fee2e2; color: #b91c1c;
  font-size: 12px; padding: 4px 10px; border-radius: 999px;
}
.card h3, .case-card h3 { font-size: 20px; margin-bottom: 12px; }
.card p, .case-card p { color: var(--muted); font-size: 15px; margin-bottom: 14px; }
.feature-list { list-style: none; margin-bottom: 16px; }
.feature-list li { padding: 6px 0 6px 18px; position: relative; color: var(--muted); font-size: 14px; }
.feature-list li::before { content: "•"; position: absolute; left: 0; color: var(--primary); }
.price { font-size: 18px; font-weight: 700; color: var(--primary-dark); margin-bottom: 10px; }
.text-link { color: var(--primary); font-weight: 600; font-size: 14px; }
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
@media (max-width: 900px) { .steps { grid-template-columns: 1fr; } }
.step { background: var(--white); border: 1px solid var(--border); border-radius: 14px; padding: 20px; }
.step span { color: var(--primary); font-weight: 800; font-size: 22px; }
.step h4 { margin: 10px 0 6px; }
.step p { color: var(--muted); font-size: 14px; }
.case-meta { font-size: 13px; color: var(--primary); font-weight: 600; }
.faq { max-width: 820px; margin: 0 auto; }
.faq details {
  background: var(--white); border: 1px solid var(--border); border-radius: 12px;
  padding: 16px 18px; margin-bottom: 12px;
}
.faq summary { cursor: pointer; font-weight: 600; }
.faq p { margin-top: 10px; color: var(--muted); font-size: 15px; }
.cta { background: #0f172a; color: #fff; padding: 48px 0; }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.page-hero { background: var(--white); border-bottom: 1px solid var(--border); padding: 48px 0; }
.page-hero h1 { font-size: 34px; margin-bottom: 10px; }
.page-hero p { color: var(--muted); max-width: 720px; }
.content-block { background: var(--white); border: 1px solid var(--border); border-radius: 16px; padding: 28px; margin-bottom: 20px; }
.content-block h2, .content-block h3 { margin-bottom: 12px; }
.content-block p, .content-block li { color: var(--muted); margin-bottom: 10px; font-size: 15px; }
.content-block ul { padding-left: 20px; }
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th, .table td { border: 1px solid var(--border); padding: 12px; text-align: left; }
.table th { background: #f1f5f9; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 768px) { .form-grid { grid-template-columns: 1fr; } }
.form-field label { display: block; font-size: 14px; margin-bottom: 6px; font-weight: 600; }
.form-field input, .form-field select, .form-field textarea {
  width: 100%; border: 1px solid var(--border); border-radius: 10px; padding: 12px; font-size: 15px;
}
.form-field textarea { min-height: 120px; resize: vertical; }
.contact-card { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 900px) { .contact-card { grid-template-columns: 1fr; } }
.site-footer { background: #0f172a; color: #94a3b8; padding: 48px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr 1fr; gap: 24px; margin-bottom: 24px; }
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer-brand { color: #f8fafc; font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.site-footer h4 { color: #e2e8f0; margin-bottom: 10px; font-size: 15px; }
.site-footer a, .site-footer p { display: block; color: #94a3b8; font-size: 14px; margin-bottom: 8px; }
.footer-bottom {
  border-top: 1px solid #334155; padding-top: 16px; display: flex;
  justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 14px;
}