/* ====== 全局样式 ====== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #1e3a5f;
  --primary-dark: #0f2942;
  --accent: #2980b9;
  --accent-light: #3498db;
  --text-dark: #2c3e50;
  --text-light: #7f8c8d;
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --border: #e2e8f0;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Microsoft YaHei', 'PingFang SC', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text-dark);
  line-height: 1.6;
  background: var(--bg-light);
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s ease;
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ====== 导航栏 ====== */
.navbar {
  background: var(--bg-white);
  box-shadow: var(--shadow);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  font-size: 20px;
}

.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
}

.logo-text span {
  display: block;
  font-size: 12px;
  font-weight: 400;
  color: var(--text-light);
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  font-size: 15px;
  color: var(--text-dark);
  font-weight: 500;
  position: relative;
  padding: 8px 0;
}

.nav-links a:hover {
  color: var(--accent);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.nav-links a:hover::after {
  width: 100%;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 10px;
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--text-dark);
  transition: all 0.3s ease;
}

/* ====== Hero 区域 ====== */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  padding: 160px 0 100px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero .container {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
}

.hero-content {
  flex: 1;
  max-width: 600px;
}

.hero-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.15);
  padding: 8px 16px;
  border-radius: 50px;
  font-size: 14px;
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
}

.hero h1 {
  font-size: 42px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 20px;
}

.hero p {
  font-size: 18px;
  opacity: 0.9;
  margin-bottom: 32px;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: white;
}

.btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(41, 128, 185, 0.4);
}

.btn-outline {
  background: transparent;
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: white;
}

.hero-visual {
  flex: 1;
  max-width: 500px;
}

.hero-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
  border-radius: 16px;
  padding: 32px;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-card h3 {
  font-size: 20px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.hero-card ul li {
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  gap: 12px;
}

.hero-card ul li:last-child {
  border-bottom: none;
}

.hero-card .icon {
  width: 32px;
  height: 32px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ====== 关于我们 ====== */
.about {
  padding: 100px 0;
  background: var(--bg-white);
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  font-size: 36px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
}

.section-header p {
  font-size: 18px;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-text h3 {
  font-size: 28px;
  color: var(--primary);
  margin-bottom: 20px;
}

.about-text p {
  color: var(--text-light);
  margin-bottom: 16px;
  font-size: 16px;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 30px;
}

.about-feature {
  display: flex;
  align-items: center;
  gap: 12px;
}

.about-feature .icon {
  width: 40px;
  height: 40px;
  background: var(--bg-light);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}

.about-feature span {
  font-weight: 500;
}

.about-image {
  position: relative;
}

.about-image img {
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
}

.about-stats {
  position: absolute;
  bottom: -30px;
  left: -30px;
  background: var(--primary);
  color: white;
  padding: 24px 32px;
  border-radius: 12px;
  display: flex;
  gap: 40px;
}

.stat-item {
  text-align: center;
}

.stat-item .number {
  font-size: 32px;
  font-weight: 700;
  display: block;
}

.stat-item .label {
  font-size: 14px;
  opacity: 0.8;
}

/* ====== 产品展示 ====== */
.products {
  padding: 100px 0;
  background: var(--bg-light);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.product-card {
  background: var(--bg-white);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.product-image {
  height: 200px;
  overflow: hidden;
  position: relative;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.product-card:hover .product-image img {
  transform: scale(1.1);
}

.product-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--accent);
  color: white;
  padding: 6px 12px;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 600;
}

.product-info {
  padding: 24px;
}

.product-info h3 {
  font-size: 20px;
  color: var(--primary);
  margin-bottom: 12px;
}

.product-info p {
  color: var(--text-light);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 16px;
}

.product-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.spec-tag {
  background: var(--bg-light);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 12px;
  color: var(--text-dark);
}

/* ====== 许可资质 ====== */
.license {
  padding: 100px 0;
  background: var(--bg-white);
}

.license-content {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}

.license-category {
  background: var(--bg-light);
  border-radius: 16px;
  padding: 32px;
  border: 1px solid var(--border);
}

.license-category h3 {
  font-size: 22px;
  color: var(--primary);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.license-category h3 .badge {
  background: var(--accent);
  color: white;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 500;
}

.license-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.license-item {
  background: var(--bg-white);
  padding: 16px 20px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all 0.3s ease;
}

.license-item:hover {
  box-shadow: var(--shadow);
  transform: translateX(4px);
}

.license-item .icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  flex-shrink: 0;
}

.license-item span {
  font-size: 15px;
  font-weight: 500;
}

/* ====== 服务优势 ====== */
.advantages {
  padding: 100px 0;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
}

.advantages .section-header h2 {
  color: white;
}

.advantages .section-header p {
  color: rgba(255, 255, 255, 0.8);
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.advantage-card {
  text-align: center;
  padding: 40px 24px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
}

.advantage-card:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-8px);
}

.advantage-card .icon {
  width: 72px;
  height: 72px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  font-size: 32px;
}

.advantage-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.advantage-card p {
  font-size: 14px;
  opacity: 0.8;
  line-height: 1.7;
}

/* ====== 联系我们 ====== */
.contact {
  padding: 100px 0;
  background: var(--bg-light);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.contact-info h3 {
  font-size: 28px;
  color: var(--primary);
  margin-bottom: 16px;
}

.contact-info > p {
  color: var(--text-light);
  margin-bottom: 32px;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-item {
  display: flex;
  gap: 16px;
}

.contact-item .icon {
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: white;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-item .text {
  display: flex;
  flex-direction: column;
}

.contact-item .label {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 4px;
}

.contact-item .value {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-dark);
}

.contact-form-wrapper {
  background: var(--bg-white);
  border-radius: 16px;
  padding: 40px;
  box-shadow: var(--shadow);
}

.contact-form-wrapper h3 {
  font-size: 24px;
  color: var(--primary);
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  transition: all 0.3s ease;
  font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(41, 128, 185, 0.1);
}

.form-group textarea {
  height: 120px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.btn-submit {
  width: 100%;
  background: var(--primary);
  color: white;
  padding: 16px;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-submit:hover {
  background: var(--primary-dark);
}

/* ====== 页脚 ====== */
.footer {
  background: var(--primary-dark);
  color: white;
  padding: 60px 0 30px;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 40px;
}

.footer-brand p {
  opacity: 0.7;
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.8;
}

.footer-links h4,
.footer-products h4,
.footer-contact h4 {
  font-size: 16px;
  margin-bottom: 20px;
  color: white;
}

.footer-links ul,
.footer-products ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a,
.footer-products a {
  font-size: 14px;
  opacity: 0.7;
  transition: opacity 0.3s ease;
}

.footer-links a:hover,
.footer-products a:hover {
  opacity: 1;
}

.footer-contact p {
  font-size: 14px;
  opacity: 0.7;
  margin-bottom: 8px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 30px;
  text-align: center;
  font-size: 14px;
  opacity: 0.6;
}

/* ====== 响应式设计 ====== */
@media (max-width: 1024px) {
  .hero .container {
    flex-direction: column;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-visual {
    max-width: 100%;
  }

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

  .about-stats {
    position: static;
    margin-top: 20px;
    justify-content: center;
  }

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

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

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

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 80px;
    left: 0;
    right: 0;
    background: var(--bg-white);
    flex-direction: column;
    padding: 20px;
    gap: 0;
    box-shadow: var(--shadow);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links a {
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
  }

  .mobile-menu-btn {
    display: flex;
  }

  .hero h1 {
    font-size: 32px;
  }

  .hero p {
    font-size: 16px;
  }

  .section-header h2 {
    font-size: 28px;
  }

  .products-grid {
    grid-template-columns: 1fr;
  }

  .license-content {
    grid-template-columns: 1fr;
  }

  .advantages-grid {
    grid-template-columns: 1fr;
  }

  .contact-content {
    grid-template-columns: 1fr;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .about-stats {
    flex-direction: column;
    gap: 20px;
  }

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