/* === 大于传播 官网样式 === */

/* 基础重置 */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --navy: #1a1f36;
  --navy-light: #2a3150;
  --gold: #c9a96e;
  --gold-light: #e0c78a;
  --white: #ffffff;
  --bg-light: #f8f7f4;
  --bg-gray: #f0efe9;
  --text: #2d2d2d;
  --text-light: #666666;
  --text-inverse: #ffffff;
  --border: #e0ddd6;
  --radius: 6px;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --max-width: 1200px;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  line-height: 1.75;
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

/* 容器 */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* 头部导航 */
.site-header {
  background: var(--navy);
  position: sticky; top: 0; z-index: 100;
  box-shadow: 0 1px 8px rgba(0,0,0,0.15);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: var(--max-width); margin: 0 auto; padding: 0 20px;
  height: 64px;
}
.logo { color: var(--white); font-size: 1.3rem; font-weight: 700; text-decoration: none; letter-spacing: 1px; }
.logo span { color: var(--gold); }

.nav-links { display: flex; list-style: none; gap: 2px; }
.nav-links a {
  color: rgba(255,255,255,0.85); text-decoration: none; padding: 8px 16px;
  border-radius: var(--radius); font-size: 0.92rem; transition: all 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--gold); background: rgba(255,255,255,0.08); }

/* 移动端汉堡菜单 */
.menu-toggle {
  display: none; background: none; border: none; color: var(--white);
  font-size: 1.6rem; cursor: pointer; padding: 4px 8px;
}

/* Hero */
.hero {
  background: var(--navy);
  color: var(--white);
  padding: 80px 0;
  text-align: center;
}
.hero h1 { font-size: 2.6rem; font-weight: 800; line-height: 1.3; margin-bottom: 16px; }
.hero h1 span { color: var(--gold); }
.hero p { font-size: 1.15rem; color: rgba(255,255,255,0.75); max-width: 680px; margin: 0 auto 32px; }
.hero .btn-group { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* 按钮 */
.btn {
  display: inline-block; padding: 12px 28px; border-radius: var(--radius);
  font-size: 0.95rem; font-weight: 600; text-decoration: none;
  transition: all 0.2s; cursor: pointer; border: 2px solid transparent;
}
.btn-primary { background: var(--gold); color: var(--navy); border-color: var(--gold); }
.btn-primary:hover { background: var(--gold-light); }
.btn-outline { background: transparent; color: var(--white); border-color: rgba(255,255,255,0.4); }
.btn-outline:hover { border-color: var(--gold); color: var(--gold); }
.btn-small { padding: 8px 20px; font-size: 0.88rem; }

/* 小节标题 */
.section { padding: 72px 0; }
.section-alt { background: var(--bg-light); }
.section-header { text-align: center; margin-bottom: 48px; }
.section-header h2 { font-size: 2rem; font-weight: 700; color: var(--navy); margin-bottom: 12px; }
.section-header p { color: var(--text-light); max-width: 600px; margin: 0 auto; font-size: 1rem; }

/* 卡片网格 */
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 24px; }

/* 服务卡片 */
.service-card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 36px 28px;
  transition: all 0.25s; text-decoration: none; color: var(--text);
  display: block;
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--gold);
}
.service-card .card-icon { font-size: 2.2rem; margin-bottom: 16px; }
.service-card h3 { font-size: 1.2rem; color: var(--navy); margin-bottom: 10px; }
.service-card p { color: var(--text-light); font-size: 0.93rem; line-height: 1.7; }

/* 数据亮点 */
.stats-row { display: flex; justify-content: center; gap: 60px; flex-wrap: wrap; margin-top: 32px; }
.stat-item { text-align: center; }
.stat-number { font-size: 2.8rem; font-weight: 800; color: var(--gold); line-height: 1.2; }
.stat-label { font-size: 0.92rem; color: rgba(255,255,255,0.7); margin-top: 4px; }

/* 亮点块 */
.highlight-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; }
.highlight-card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px 24px; text-align: center;
}
.highlight-card h3 { font-size: 1.05rem; color: var(--navy); margin-bottom: 8px; }
.highlight-card p { color: var(--text-light); font-size: 0.9rem; }

/* 页面内页 Hero */
.page-hero {
  background: var(--navy);
  color: var(--white);
  padding: 48px 0;
  text-align: center;
}
.page-hero h1 { font-size: 2rem; font-weight: 700; }
.page-hero p { color: rgba(255,255,255,0.7); margin-top: 8px; font-size: 1rem; }

/* 服务详情区 */
.service-detail { padding: 56px 0; }
.service-detail h2 { font-size: 1.5rem; color: var(--navy); margin: 40px 0 16px; }
.service-detail h2:first-of-type { margin-top: 0; }
.service-detail h3 { font-size: 1.15rem; color: var(--navy); margin: 28px 0 10px; }
.service-detail p { margin-bottom: 14px; color: var(--text-light); }
.service-detail ul { margin: 10px 0 20px 20px; color: var(--text-light); }
.service-detail li { margin-bottom: 6px; }
.service-detail table { width: 100%; border-collapse: collapse; margin: 20px 0; }
.service-detail th, .service-detail td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; font-size: 0.93rem; }
.service-detail th { background: var(--navy); color: var(--white); font-weight: 600; }
.service-detail td { color: var(--text-light); }

/* 流程区 */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 20px; margin: 24px 0; }
.step {
  background: var(--bg-light); border-radius: var(--radius);
  padding: 28px 18px; text-align: center; position: relative;
}
.step-num {
  width: 40px; height: 40px; background: var(--navy); color: var(--gold);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  margin: 0 auto 12px; font-weight: 700; font-size: 1.1rem;
}
.step h4 { font-size: 0.95rem; color: var(--navy); margin-bottom: 6px; }
.step p { font-size: 0.83rem; color: var(--text-light); }

/* FAQ */
.faq-section { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border); border-radius: var(--radius);
  margin-bottom: 14px; padding: 20px 24px; background: var(--white);
}
.faq-item h3 { font-size: 1rem; color: var(--navy); margin-bottom: 8px; cursor: pointer; }
.faq-item p, .faq-item li { color: var(--text-light); font-size: 0.9rem; line-height: 1.7; }
.faq-item ul { margin: 8px 0 0 18px; }

/* 案例卡片 */
.case-card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; transition: all 0.25s;
}
.case-card:hover { box-shadow: var(--shadow-lg); }
.case-img {
  background: var(--bg-gray); height: 200px; display: flex;
  align-items: center; justify-content: center; color: var(--text-light);
  font-size: 0.9rem;
}
.case-body { padding: 22px 20px; }
.case-body .tag {
  display: inline-block; background: var(--bg-light); color: var(--gold);
  padding: 3px 10px; border-radius: 20px; font-size: 0.8rem; margin-bottom: 10px;
}
.case-body h3 { font-size: 1.05rem; color: var(--navy); margin-bottom: 8px; }
.case-body p { color: var(--text-light); font-size: 0.88rem; line-height: 1.6; }

/* 联系 */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info h2 { font-size: 1.4rem; color: var(--navy); margin-bottom: 20px; }
.contact-item { display: flex; gap: 14px; margin-bottom: 18px; align-items: flex-start; }
.contact-item .icon { font-size: 1.3rem; min-width: 28px; text-align: center; }
.contact-item strong { display: block; color: var(--navy); font-size: 0.93rem; }
.contact-item span { color: var(--text-light); font-size: 0.9rem; }

/* CTA区 */
.cta-section {
  background: var(--navy); color: var(--white); padding: 56px 0;
  text-align: center;
}
.cta-section h2 { font-size: 1.6rem; margin-bottom: 12px; }
.cta-section p { color: rgba(255,255,255,0.7); margin-bottom: 24px; font-size: 1rem; }

/* 页脚 */
.site-footer {
  background: #141824; color: rgba(255,255,255,0.6);
  padding: 40px 0 28px; font-size: 0.88rem;
}
.footer-inner { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 30px; margin-bottom: 28px; }
.footer-grid h4 { color: var(--white); font-size: 0.95rem; margin-bottom: 12px; }
.footer-grid p, .footer-grid a { color: rgba(255,255,255,0.5); line-height: 1.8; }
.footer-grid a { text-decoration: none; display: block; }
.footer-grid a:hover { color: var(--gold); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px;
  text-align: center; font-size: 0.82rem;
}

/* 关于页 */
.about-intro { max-width: 800px; }
.about-intro p { margin-bottom: 16px; color: var(--text-light); line-height: 1.85; }
.about-intro .lead { font-size: 1.1rem; color: var(--navy); font-weight: 600; margin-bottom: 20px; }

/* 响应式 */
@media (max-width: 768px) {
  .hero h1 { font-size: 1.8rem; }
  .hero p { font-size: 1rem; }
  .section { padding: 48px 0; }
  .stats-row { gap: 30px; }
  .stat-number { font-size: 2rem; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; background: var(--navy); flex-direction: column; padding: 12px 0; }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 24px; border-radius: 0; }
  .menu-toggle { display: block; }
  .steps { grid-template-columns: 1fr 1fr; }
  .service-detail table { font-size: 0.82rem; }
  .service-detail th, .service-detail td { padding: 8px 10px; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.5rem; }
  .card-grid { grid-template-columns: 1fr; }
  .highlight-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .stats-row { flex-direction: column; gap: 20px; }
}