/* ========================================
   Ant Design 风格企业门户 - 样式表
   ======================================== */

/* ---------- CSS 变量 (Ant Design 设计规范) ---------- */
:root {
  --primary: #1677ff;
  --primary-hover: #4096ff;
  --primary-active: #0958d9;
  --success: #52c41a;
  --warning: #faad14;
  --error: #ff4d4f;
  --text-primary: rgba(0, 0, 0, 0.88);
  --text-secondary: rgba(0, 0, 0, 0.65);
  --text-tertiary: rgba(0, 0, 0, 0.45);
  --bg-container: #ffffff;
  --bg-layout: #f5f5f5;
  --bg-elevated: #ffffff;
  --border-color: #f0f0f0;
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.03), 0 1px 6px -1px rgba(0, 0, 0, 0.02), 0 2px 4px 0 rgba(0, 0, 0, 0.02);
  --shadow: 0 6px 16px 0 rgba(0, 0, 0, 0.08), 0 3px 6px -4px rgba(0, 0, 0, 0.12), 0 9px 28px 8px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --transition: all 0.2s cubic-bezier(0.645, 0.045, 0.355, 1);
  --max-width: 1200px;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
}

body {
  font-family: var(--font-family);
  font-size: 14px;
  line-height: 1.5715;
  color: var(--text-primary);
  background: #fff;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: var(--primary);
}

img {
  max-width: 100%;
  display: block;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header / Navigation ---------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.header.scrolled {
  box-shadow: var(--shadow);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo-img {
  height: 36px;
  width: auto;
  object-fit: contain;
}

.logo-img-sm {
  height: 32px;
}

.logo-text {
  font-size: 18px;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: 0.06em;
  font-family: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  font-size: 14px;
  color: var(--text-secondary);
  border-radius: var(--border-radius);
  transition: var(--transition);
  font-weight: 500;
}

.nav-link:hover {
  color: var(--primary);
  background: rgba(22, 119, 255, 0.06);
}

.nav-link.active {
  color: var(--primary);
  background: rgba(22, 119, 255, 0.08);
}

/* Mobile menu button */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ---------- Hero Section ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 120px 24px 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #f0f5ff 0%, #e6f4ff 25%, #f0f5ff 50%, #e6f7ff 75%, #f0f5ff 100%);
}

.hero-gradient {
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(22, 119, 255, 0.08) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 780px;
  text-align: center;
}

.hero-tag {
  display: inline-block;
  padding: 6px 20px;
  background: rgba(22, 119, 255, 0.08);
  border: 1px solid rgba(22, 119, 255, 0.15);
  border-radius: 100px;
  font-size: 14px;
  color: var(--primary);
  margin-bottom: 32px;
  font-weight: 500;
}

.hero-title {
  font-size: 56px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--primary) 0%, #69b1ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 64px;
  max-width: 780px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: auto;
}

/* ---------- Buttons (Ant Design style) ---------- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 28px;
  font-size: 15px;
  font-weight: 500;
  color: #fff;
  background: var(--primary);
  border: 1px solid var(--primary);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 2px 0 rgba(22, 119, 255, 0.06);
  white-space: nowrap;
}

.btn-primary:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
}

.btn-primary:active {
  background: var(--primary-active);
  border-color: var(--primary-active);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 28px;
  font-size: 15px;
  font-weight: 500;
  color: var(--primary);
  background: transparent;
  border: 1px solid var(--primary);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-outline:hover {
  color: var(--primary-hover);
  border-color: var(--primary-hover);
}

/* Hero Stats */
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 64px;
  padding-top: 32px;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.stat-num {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-size: 14px;
  color: var(--text-tertiary);
}

/* ---------- Section Common ---------- */
.section {
  padding: 100px 0;
}

.section:nth-child(even) {
  background: var(--bg-layout);
}

.section-header {
  text-align: center;
  max-width: 660px;
  margin: 0 auto 64px;
}

.section-tag {
  display: inline-block;
  padding: 4px 16px;
  background: rgba(22, 119, 255, 0.06);
  border-radius: 100px;
  font-size: 13px;
  color: var(--primary);
  font-weight: 500;
  margin-bottom: 16px;
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ---------- About Section ---------- */
.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.about-card {
  background: #fff;
  padding: 40px 32px;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  text-align: center;
  transition: var(--transition);
}

.about-card:hover {
  box-shadow: var(--shadow);
  border-color: transparent;
  transform: translateY(-2px);
}

.about-icon {
  font-size: 40px;
  margin-bottom: 20px;
}

.about-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.about-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ---------- Services Section ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background: #fff;
  padding: 36px 28px;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.service-card:hover {
  box-shadow: var(--shadow);
  border-color: var(--primary);
  transform: translateY(-2px);
}

.service-icon {
  font-size: 36px;
  margin-bottom: 16px;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(22, 119, 255, 0.06);
  border-radius: var(--border-radius-lg);
}

.service-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.service-card > p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.service-features {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.service-features li {
  padding: 3px 12px;
  font-size: 12px;
  color: var(--primary);
  background: rgba(22, 119, 255, 0.06);
  border-radius: 4px;
  white-space: nowrap;
}

/* ---------- Cases / Brand Wall Section ---------- */
.brand-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 48px;
  margin-bottom: 28px;
}

.brand-row:last-child {
  margin-bottom: 0;
}

.brand-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: var(--transition);
  width: 200px;
}

.brand-item:hover {
  transform: translateY(-4px);
}

.brand-logo {
  width: 180px;
  height: 90px;
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  padding: 12px;
}

.brand-item:hover .brand-logo {
  box-shadow: var(--shadow);
}

.brand-img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

/* ---------- Contact Section ---------- */
.contact-card {
  max-width: 600px;
  margin: 0 auto;
  background: #fff;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  padding: 48px 56px;
}

.contact-info-new {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.contact-item-new {
  display: flex;
  align-items: center;
  gap: 20px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.contact-item-new:last-child {
  border-bottom: none;
  padding-bottom: 0;
  align-items: flex-start;
}

.contact-label {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  min-width: 80px;
  flex-shrink: 0;
}

.contact-value {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.contact-link {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

.contact-link:hover {
  color: var(--primary-hover);
}

.contact-qrcode {
  width: 120px;
  height: 120px;
  border-radius: var(--border-radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.contact-qrcode img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- Footer ---------- */
.footer {
  background: #141414;
  color: rgba(255, 255, 255, 0.65);
  padding: 64px 0 0;
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 80px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-company-name {
  font-size: 20px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 12px;
  letter-spacing: 0.04em;
}

.footer-slogan {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.45);
  line-height: 1.6;
}

.footer-links h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 20px;
}

.footer-links a {
  display: block;
  color: rgba(255, 255, 255, 0.55);
  font-size: 14px;
  margin-bottom: 12px;
  transition: var(--transition);
}

.footer-links a:hover {
  color: #fff;
}

.footer-bottom {
  padding: 24px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.35);
}

/* ---------- Back to Top ---------- */
.back-to-top {
  position: fixed;
  bottom: 40px;
  right: 40px;
  width: 44px;
  height: 44px;
  border-radius: var(--border-radius);
  background: #fff;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow);
  cursor: pointer;
  font-size: 20px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  color: var(--primary);
  border-color: var(--primary);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 40px;
  }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
  }

  .nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
  }

  .nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-link {
    width: 100%;
    padding: 12px 16px;
  }

  .hero-title {
    font-size: 32px;
  }

  .hero-stats {
    gap: 32px;
    flex-wrap: wrap;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .btn-primary,
  .btn-outline {
    width: 100%;
    max-width: 300px;
  }

  .section {
    padding: 64px 0;
  }

  .section-title {
    font-size: 28px;
  }

  .about-grid,
  .services-grid {
    grid-template-columns: 1fr;
  }

  .contact-card {
    padding: 32px 24px;
  }

  .footer-grid {
    flex-direction: column;
    gap: 32px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 28px;
  }

  .hero-desc {
    font-size: 14px;
  }

  .hero-stats {
    gap: 20px;
  }

  .stat-num {
    font-size: 24px;
  }

  .footer-grid {
    gap: 24px;
  }

  .contact-card {
    padding: 24px 20px;
  }

  .contact-item-new {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}