/* ================== 重置 + 基础 ================== */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  color: #1F2937;
  background: #F8FAFC;
  font-feature-settings: "kern" 1;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }

/* ================== 顶部 Header ================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #FFFFFF;
  border-bottom: 1px solid #E5E7EB;
  box-shadow: 0 2px 8px rgba(15, 44, 92, 0.06);
}
.header-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.brand-logo {
  width: 42px;
  height: 42px;
  border-radius: 6px;
  background: #FFFFFF;
}
.brand-text { line-height: 1.2; }
.brand-name {
  font-size: 15px;
  font-weight: 800;
  color: #0F2C5C;
  letter-spacing: 0.2px;
}
.brand-subtitle {
  font-size: 11px;
  font-weight: 600;
  color: #6B7280;
  letter-spacing: 0.5px;
  margin-top: 2px;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: nowrap;
}
.nav-link {
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 500;
  color: #4B5563;
  border-radius: 6px;
  transition: all 0.2s;
}
.nav-link:hover {
  background: #F3F4F6;
  color: #0F2C5C;
}
.nav-link.active {
  background: #0F2C5C;
  color: #FFFFFF;
  font-weight: 700;
}
.nav-cta-phone {
  padding: 9px 18px;
  font-size: 14px;
  font-weight: 700;
  color: #FFFFFF !important;
  background: linear-gradient(135deg, #F59E0B 0%, #EA580C 100%);
  border-radius: 6px;
  margin-left: 8px;
  box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
  transition: transform 0.2s;
}
.nav-cta-phone:hover { transform: translateY(-1px); }

/* ================== Hero 主区 ================== */
.hero-section {
  background: linear-gradient(135deg, #0F2C5C 0%, #1E3A5F 50%, #1E5BA8 100%);
  color: #FFFFFF;
  padding: 80px 24px 100px;
  position: relative;
  overflow: hidden;
}
.hero-section::before {
  content: "";
  position: absolute;
  top: -100px;
  right: -100px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.15) 0%, transparent 70%);
  border-radius: 50%;
}
.hero-content {
  max-width: 1280px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.hero-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.25);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
  letter-spacing: 1px;
  color: #FFFFFF;
}
.hero-title {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 16px;
  color: #FFFFFF;
}
.hero-subtitle {
  font-size: 22px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: 18px;
  letter-spacing: 0.3px;
}
.hero-desc {
  font-size: 17px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.85);
  max-width: 800px;
  margin-bottom: 32px;
}
.hero-cta-group {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}
.cta-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, #F59E0B 0%, #EA580C 100%);
  color: #FFFFFF !important;
  padding: 16px 32px;
  font-size: 17px;
  font-weight: 800;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.4);
  transition: all 0.2s;
}
.cta-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.5);
}
.cta-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.12);
  border: 2px solid rgba(255, 255, 255, 0.35);
  color: #FFFFFF !important;
  padding: 14px 32px;
  font-size: 17px;
  font-weight: 700;
  border-radius: 8px;
  transition: all 0.2s;
}
.cta-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.55);
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 720px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 12px;
  padding: 24px;
}
.stat-item { text-align: center; }
.stat-number {
  font-size: 36px;
  font-weight: 800;
  color: #10B981;
  line-height: 1;
  margin-bottom: 6px;
  letter-spacing: -0.5px;
}
.stat-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  font-weight: 500;
}

/* ================== 通用 section ================== */
section { padding: 80px 24px; }
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}
.section-title {
  font-size: 36px;
  font-weight: 800;
  color: #0F2C5C;
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}
.section-subtitle {
  font-size: 16px;
  color: #6B7280;
  font-weight: 500;
}

/* ================== 7 大业务板块 ================== */
.services-section { background: #FFFFFF; }
.services-grid {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 48px;
}
.service-card {
  background: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-top: 4px solid #0F2C5C;
  border-radius: 12px;
  padding: 32px 28px;
  text-align: left;
  transition: all 0.2s;
  display: block;
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(15, 44, 92, 0.12);
  border-color: #0F2C5C;
}
.service-icon {
  font-size: 44px;
  margin-bottom: 16px;
  line-height: 1;
}
.service-name {
  font-size: 22px;
  font-weight: 700;
  color: #0F2C5C;
  margin-bottom: 10px;
}
.service-desc {
  font-size: 14px;
  line-height: 1.7;
  color: #4B5563;
  margin-bottom: 16px;
  min-height: 70px;
}
.service-stat {
  font-size: 13px;
  font-weight: 700;
  color: #10B981;
  padding-top: 12px;
  border-top: 1px dashed #E5E7EB;
}
.cta-row {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.cta-primary-large {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, #F59E0B 0%, #EA580C 100%);
  color: #FFFFFF !important;
  padding: 18px 40px;
  font-size: 18px;
  font-weight: 800;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.4);
}
.cta-secondary-large {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #FFFFFF;
  border: 2px solid #0F2C5C;
  color: #0F2C5C !important;
  padding: 16px 40px;
  font-size: 18px;
  font-weight: 700;
  border-radius: 8px;
}

/* ================== 真实案例 ================== */
.cases-section { background: #F8FAFC; }
.cases-grid {
  max-width: 1280px;
  margin: 0 auto 48px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: 20px;
}
.case-card {
  background: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.2s;
  display: flex;
  flex-direction: column;
}
.case-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(15, 44, 92, 0.1);
}
.case-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: linear-gradient(135deg, #F0F9FF 0%, #E0F2FE 100%);
  border-bottom: 1px solid #E5E7EB;
}
.case-industry {
  background: #0F2C5C;
  color: #FFFFFF;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}
.case-client {
  font-size: 13px;
  color: #4B5563;
  font-weight: 600;
}
.case-body { padding: 20px 24px; flex: 1; }
.case-row { margin-bottom: 14px; }
.case-row:last-child { margin-bottom: 0; }
.case-label {
  font-size: 12px;
  font-weight: 700;
  color: #6B7280;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
  text-transform: uppercase;
}
.case-text {
  font-size: 14px;
  line-height: 1.7;
  color: #1F2937;
}
.case-result-row { 
  background: #F0FDF4; 
  padding: 12px; 
  border-radius: 6px; 
  margin: 14px -8px 0; 
}
.case-result { 
  color: #065F46; 
  font-weight: 600; 
}
.case-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: #FAFAFA;
  border-top: 1px solid #E5E7EB;
  gap: 12px;
  flex-wrap: wrap;
}
.case-policy-link {
  font-size: 13px;
  color: #3B82F6;
  font-weight: 600;
}
.case-policy-link:hover { text-decoration: underline; }
.case-cta {
  font-size: 13px;
  background: linear-gradient(135deg, #F59E0B 0%, #EA580C 100%);
  color: #FFFFFF !important;
  padding: 8px 16px;
  border-radius: 6px;
  font-weight: 700;
}

/* ================== 关于大合 ================== */
.about-section { background: #FFFFFF; }
.about-grid {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.about-item {
  background: #F8FAFC;
  border: 1px solid #E5E7EB;
  border-radius: 12px;
  padding: 32px 28px;
  text-align: left;
}
.about-icon {
  font-size: 40px;
  margin-bottom: 12px;
  line-height: 1;
}
.about-item h3 {
  font-size: 19px;
  font-weight: 700;
  color: #0F2C5C;
  margin-bottom: 10px;
}
.about-item p {
  font-size: 14px;
  line-height: 1.7;
  color: #4B5563;
}
.about-item p + p { margin-top: 6px; }

/* ================== 跨站引流 ================== */
.cross-promo-section {
  background: linear-gradient(135deg, #10B981 0%, #059669 100%);
  color: #FFFFFF;
  text-align: center;
  padding: 80px 24px;
}
.cross-promo-content { max-width: 800px; margin: 0 auto; }
.cross-promo-title {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 18px;
  letter-spacing: -0.5px;
}
.cross-promo-desc {
  font-size: 17px;
  line-height: 1.85;
  margin-bottom: 32px;
  color: rgba(255, 255, 255, 0.95);
}
.cross-promo-section .cta-primary-large {
  background: #FFFFFF;
  color: #10B981 !important;
}

/* ================== Footer ================== */
.site-footer {
  background: #0F2C5C;
  color: rgba(255, 255, 255, 0.85);
  padding: 48px 24px 24px;
}
.footer-content { max-width: 1280px; margin: 0 auto; }
.footer-main {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 16px;
}
.footer-brand img {
  width: 56px;
  height: 56px;
  border-radius: 6px;
  background: #FFFFFF;
  padding: 4px;
}
.footer-company {
  font-size: 17px;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 4px;
}
.footer-tagline {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
}
.footer-contact {
  text-align: right;
  font-size: 14px;
  line-height: 1.9;
}
.contact-item a {
  color: #F59E0B;
  font-weight: 700;
  font-size: 18px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 20px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  text-align: center;
}
.footer-bottom a { color: rgba(255, 255, 255, 0.75); }
.footer-bottom a:hover { color: #FFFFFF; }
.footer-bottom span { margin: 0 6px; }

/* ================== 响应式 ================== */
@media (max-width: 1024px) {
  .hero-title { font-size: 40px; }
  .hero-subtitle { font-size: 18px; }
  .section-title { font-size: 28px; }
}
@media (max-width: 768px) {
  .header-container { flex-wrap: wrap; }
  .site-nav { width: 100%; overflow-x: auto; }
  .hero-section { padding: 60px 20px 80px; }
  .hero-title { font-size: 32px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  section { padding: 60px 20px; }
  .footer-main { flex-direction: column; }
  .footer-contact { text-align: left; }
}


/* ========== Mobile 菜单适配(2026-07-05 修复) ========== */
/* 汉堡按钮(只 mobile 显示) */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  color: #0F2C5C;
  cursor: pointer;
  padding: 8px;
}

@media (max-width: 1024px) {
  .site-nav {
    gap: 4px !important;
    flex-wrap: wrap;
    justify-content: flex-end !important;
  }
  .site-nav .nav-link {
    padding: 8px 10px !important;
    font-size: 13px !important;
  }
}
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }
  .header-container {
    flex-wrap: nowrap !important;
    justify-content: space-between !important;
  }
  .site-nav {
    display: none !important;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #FFFFFF;
    flex-direction: column;
    width: 100%;
    padding: 16px 20px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    z-index: 100;
    border-top: 1px solid #E5E7EB;
    gap: 0 !important;
  }
  .site-nav.open {
    display: flex !important;
  }
  .site-nav .nav-link {
    padding: 14px 16px !important;
    width: 100% !important;
    border-bottom: 1px solid #F3F4F6;
    white-space: nowrap !important;
    font-size: 15px !important;
  }
  .site-nav .nav-cta-phone {
    margin-top: 12px !important;
    width: 100% !important;
    text-align: center !important;
  }
}