:root {
  --primary: #1d4e89;
  --primary-dark: #123a68;
  --primary-light: #e8f0f9;
  --accent: #e07a3f;
  --text: #1f2733;
  --text-light: #5b6675;
  --bg: #ffffff;
  --bg-alt: #f5f7fa;
  --border: #e2e7ee;
  --shadow: 0 6px 24px rgba(24, 46, 78, 0.08);
  --radius: 12px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Segoe UI", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { line-height: 1.3; font-weight: 700; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-header { text-align: center; max-width: 760px; margin: 0 auto 48px; }
.section-title { font-size: 32px; color: var(--primary-dark); margin-bottom: 14px; letter-spacing: .5px; }
.section-title::after {
  content: ""; display: block; width: 56px; height: 3px; margin: 16px auto 0;
  background: var(--accent); border-radius: 3px;
}
.section-subtitle { font-size: 16px; color: var(--text-light); }
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: transform .3s, box-shadow .3s;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 14px 34px rgba(24, 46, 78, 0.14); }
.card-icon {
  width: 52px; height: 52px; border-radius: 12px; margin-bottom: 18px;
  display: flex; align-items: center; justify-content: center;
  background: var(--primary-light); color: var(--primary);
  font-size: 24px; font-weight: 700;
}
.card-title { font-size: 19px; color: var(--primary-dark); margin-bottom: 10px; }
.card-text { font-size: 15px; color: var(--text-light); }
.card-body { margin-top: 16px; }
.btn {
  display: inline-block; padding: 13px 30px; border-radius: 40px;
  font-size: 15px; font-weight: 600; cursor: pointer; border: 2px solid transparent;
  transition: background .25s, color .25s, border-color .25s, transform .25s;
  text-align: center;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); }
.btn-outline { background: transparent; color: #fff; border-color: rgba(255,255,255,.7); }
.btn-outline:hover { background: #fff; color: var(--primary-dark); }
.btn-sm { padding: 8px 20px; font-size: 13px; }
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,.96); backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent; transition: box-shadow .3s, border-color .3s;
}
.nav.scrolled { box-shadow: 0 4px 18px rgba(24, 46, 78, 0.10); border-color: var(--border); }
.nav-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 20px; height: 72px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo { font-size: 21px; font-weight: 800; color: var(--primary-dark); letter-spacing: .5px; }
.nav-logo::before { content: "◆"; color: var(--accent); margin-right: 8px; font-size: 16px; }
.nav-list { display: flex; align-items: center; gap: 30px; }
.nav-link { font-size: 15px; color: var(--text); position: relative; padding: 6px 0; transition: color .2s; }
.nav-link:hover { color: var(--primary); }
.nav-link::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 2px;
  background: var(--accent); transition: width .3s;
}
.nav-link:hover::after { width: 100%; }
.nav-toggle {
  display: none; background: none; border: none; cursor: pointer;
  width: 40px; height: 40px; position: relative;
}
.nav-toggle span, .nav-toggle::before, .nav-toggle::after {
  content: ""; position: absolute; left: 9px; width: 22px; height: 2px;
  background: var(--primary-dark); transition: transform .3s, opacity .3s;
}
.nav-toggle::before { top: 13px; }
.nav-toggle span { top: 19px; }
.nav-toggle::after { top: 25px; }
.nav-cta { display: flex; align-items: center; gap: 12px; }
.hero {
  position: relative; padding: 160px 0 100px; overflow: hidden;
  background: linear-gradient(135deg, #123a68 0%, #1d4e89 55%, #2a6aa8 100%);
  color: #fff; text-align: center;
}
.hero::after {
  content: ""; position: absolute; right: -120px; top: -120px;
  width: 420px; height: 420px; border-radius: 50%;
  background: radial-gradient(circle, rgba(224,122,63,.32), transparent 68%);
}
.hero-inner { position: relative; z-index: 2; max-width: 900px; margin: 0 auto; padding: 0 20px; }
.hero-title { font-size: 44px; letter-spacing: 1px; margin-bottom: 22px; }
.hero-subtitle { font-size: 18px; color: rgba(255,255,255,.86); max-width: 720px; margin: 0 auto 36px; }
.hero-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; margin-bottom: 60px; }
.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  border-top: 1px solid rgba(255,255,255,.22); padding-top: 36px;
}
.hero-stat { text-align: center; }
.hero-stat-num { font-size: 32px; font-weight: 800; color: #fff; }
.hero-stat-label { font-size: 14px; color: rgba(255,255,255,.78); margin-top: 6px; }
.timeline { position: relative; padding-left: 28px; border-left: 2px solid var(--border); }
.timeline-item { position: relative; padding-bottom: 28px; }
.timeline-dot {
  position: absolute; left: -37px; top: 6px; width: 14px; height: 14px;
  border-radius: 50%; background: var(--accent); border: 3px solid #fff; box-shadow: 0 0 0 2px var(--accent);
}
.timeline-content { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 22px; }
.timeline-date { font-size: 13px; color: var(--accent); font-weight: 600; margin-bottom: 4px; }
.timeline-title { font-size: 17px; color: var(--primary-dark); margin-bottom: 6px; }
.timeline-text { font-size: 14px; color: var(--text-light); }
.news-list { display: grid; gap: 20px; }
.news-item { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); transition: transform .3s; }
.news-item:hover { transform: translateY(-3px); }
.news-title { font-size: 18px; color: var(--primary-dark); margin-bottom: 10px; }
.news-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; font-size: 13px; }
.news-date { color: var(--text-light); }
.news-category { background: var(--primary-light); color: var(--primary); padding: 2px 10px; border-radius: 20px; font-size: 12px; }
.news-summary { font-size: 15px; color: var(--text-light); }
.news-body { font-size: 15px; color: var(--text-light); margin-top: 10px; }
.news-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.tag { display: inline-block; padding: 3px 12px; font-size: 12px; border-radius: 20px; background: var(--bg-alt); color: var(--text-light); border: 1px solid var(--border); }
.faq-list { display: grid; gap: 16px; max-width: 860px; margin: 0 auto; }
.faq-item { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 22px 26px; box-shadow: var(--shadow); }
.faq-question { font-size: 17px; font-weight: 700; color: var(--primary-dark); margin-bottom: 10px; }
.faq-question::before { content: "Q "; color: var(--accent); }
.faq-answer { font-size: 15px; color: var(--text-light); }
.form-group { margin-bottom: 20px; }
.form-label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; color: var(--text); }
.form-input, .form-select, .form-textarea {
  width: 100%; padding: 12px 14px; font-size: 15px; color: var(--text);
  border: 1px solid var(--border); border-radius: 8px; background: #fff;
  font-family: inherit; transition: border-color .2s, box-shadow .2s;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(29,78,137,.12);
}
.form-textarea { min-height: 130px; resize: vertical; }
.form-submit {
  display: inline-block; padding: 13px 40px; border-radius: 40px; border: none;
  background: var(--primary); color: #fff; font-size: 15px; font-weight: 600; cursor: pointer;
  transition: background .25s, transform .25s;
}
.form-submit:hover { background: var(--primary-dark); transform: translateY(-2px); }
.form-tip { font-size: 13px; color: var(--text-light); margin-top: 10px; }
.stat-item { text-align: center; }
.stat-number { font-size: 34px; font-weight: 800; color: var(--primary); }
.stat-label { font-size: 14px; color: var(--text-light); margin-top: 4px; }
.progress { height: 8px; border-radius: 8px; background: var(--bg-alt); overflow: hidden; margin-top: 10px; }
.progress-fill { height: 100%; border-radius: 8px; background: linear-gradient(90deg, var(--primary), var(--accent)); }
.bar-chart { display: flex; align-items: flex-end; gap: 22px; height: 220px; padding: 0 8px; }
.bar-item { flex: 1; display: flex; flex-direction: column; align-items: center; height: 100%; justify-content: flex-end; }
.bar-fill { width: 100%; max-width: 56px; border-radius: 6px 6px 0 0; background: linear-gradient(180deg, var(--primary), var(--primary-dark)); }
.bar-label { font-size: 13px; color: var(--text-light); margin-top: 10px; }
.badge { display: inline-block; padding: 3px 12px; font-size: 12px; border-radius: 20px; background: var(--accent); color: #fff; }
.customer-card, .case-card, .honor-card, .partner-logo, .review-card, .benefit-card, .region-card, .support-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow); transition: transform .3s;
}
.customer-card:hover, .case-card:hover, .honor-card:hover, .partner-logo:hover,
.review-card:hover, .benefit-card:hover, .region-card:hover, .support-card:hover { transform: translateY(-4px); }
.partner-logo { display: flex; align-items: center; justify-content: center; min-height: 90px; color: var(--text-light); font-size: 14px; }
.step-list { display: grid; gap: 18px; }
.step-item { display: flex; gap: 18px; align-items: flex-start; }
.step-number {
  flex: none; width: 42px; height: 42px; border-radius: 50%;
  background: var(--primary-light); color: var(--primary);
  display: flex; align-items: center; justify-content: center; font-weight: 800;
}
.footer { background: #12243c; color: rgba(255,255,255,.72); padding: 64px 0 0; }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 36px; padding-bottom: 48px; }
.footer-col { min-width: 0; }
.footer-title { color: #fff; font-size: 16px; margin-bottom: 18px; font-weight: 700; }
.footer-link { display: block; font-size: 14px; color: rgba(255,255,255,.66); margin-bottom: 10px; transition: color .2s; }
.footer-link:hover { color: #fff; }
.footer-info { font-size: 14px; line-height: 2; color: rgba(255,255,255,.66); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.12); padding: 22px 0;
  font-size: 13px; color: rgba(255,255,255,.5); text-align: center;
}
@media (max-width: 1200px) {
  .section { padding: 70px 0; }
  .hero-title { font-size: 38px; }
}
@media (max-width: 992px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 28px 12px; }
  .nav-list { gap: 20px; }
}
@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .section-title { font-size: 26px; }
  .hero { padding: 130px 0 72px; }
  .hero-title { font-size: 30px; }
  .hero-subtitle { font-size: 16px; }
  .nav-list {
    position: fixed; top: 72px; left: 0; right: 0; flex-direction: column;
    background: #fff; gap: 0; padding: 12px 0;
    box-shadow: 0 10px 24px rgba(24,46,78,.12);
    transform: translateY(-140%); transition: transform .35s;
  }
  .nav-list.open { transform: translateY(0); }
  .nav-list .nav-link { display: block; padding: 12px 24px; width: 100%; }
  .nav-toggle { display: block; }
  .nav-cta .btn { display: none; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 480px) {
  .hero-title { font-size: 25px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .hero-stat-num { font-size: 26px; }
  .card { padding: 22px; }
  .section-title { font-size: 23px; }
}