/* ========================================
   海盈通官网 - 全局样式
   ======================================== */

/* CSS 变量 */
:root {
  --primary: #1A6FEE;
  --primary-dark: #0E4FA8;
  --primary-light: #4A90F5;
  --accent: #AACD07;
  --accent-hover: #96B506;
  --text: #333333;
  --text-light: #666666;
  --text-lighter: #999999;
  --bg: #ffffff;
  --bg-light: #f5f7fa;
  --bg-dark: #0E4FA8;
  --border: #e5e7eb;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
  --radius: 8px;
  --radius-lg: 12px;
  --transition: all 0.3s ease;
  --max-width: 1200px;
  --header-height: 72px;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

ul, ol {
  list-style: none;
}

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

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
}

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

/* ========================================
   按钮
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
  cursor: pointer;
}

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

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.btn-outline {
  border: 1.5px solid var(--accent);
  color: var(--accent);
  background: transparent;
}

.btn-outline:hover {
  background: var(--accent);
  color: #fff;
}

/* ========================================
   头部导航
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
}

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

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  font-weight: 700;
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav a {
  padding: 8px 16px;
  font-size: 15px;
  color: var(--text);
  border-radius: var(--radius);
  position: relative;
}

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

.nav a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 16px;
  right: 16px;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: var(--transition);
}

.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  box-shadow: var(--shadow);
}

.mobile-nav a {
  display: block;
  padding: 12px 0;
  font-size: 16px;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}

.mobile-nav a:last-child {
  border-bottom: none;
}

.mobile-nav a.active {
  color: var(--accent);
}

/* ========================================
   Hero 区域
   ======================================== */
.hero {
  position: relative;
  min-height: 600px;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
  color: #fff;
  overflow: hidden;
  margin-top: var(--header-height);
}

.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='0.03'%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-content {
  position: relative;
  z-index: 1;
  padding: 80px 0;
}

.hero h1 {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 20px;
  max-width: 700px;
}

.hero h1 span {
  color: var(--accent);
}

.hero p {
  font-size: 18px;
  opacity: 0.85;
  max-width: 560px;
  margin-bottom: 32px;
  line-height: 1.7;
}

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

.hero-visual {
  position: absolute;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  width: 420px;
  height: 340px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-visual-inner {
  text-align: center;
  padding: 40px;
}

.hero-visual-icon {
  font-size: 64px;
  margin-bottom: 16px;
  opacity: 0.9;
}

.hero-visual-text {
  font-size: 20px;
  opacity: 0.8;
}

/* ========================================
   Section 通用
   ======================================== */
.section {
  padding: 80px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 56px;
}

.section-title h2 {
  font-size: 36px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
}

.section-title p {
  font-size: 17px;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

.section-title .accent-line {
  width: 48px;
  height: 3px;
  background: var(--accent);
  margin: 16px auto 0;
  border-radius: 2px;
}

.bg-light {
  background: var(--bg-light);
}

.bg-dark {
  background: var(--bg-dark);
  color: #fff;
}

.bg-dark .section-title h2 {
  color: #fff;
}

.bg-dark .section-title p {
  color: rgba(255, 255, 255, 0.7);
}

/* ========================================
   产品卡片
   ======================================== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.product-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border);
  text-align: center;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.product-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 24px;
  font-weight: 700;
}

.product-card:nth-child(2) .product-icon { background: linear-gradient(135deg, #4A90F5, #6AA8FF); }
.product-card:nth-child(3) .product-icon { background: linear-gradient(135deg, #AACD07, #C5E53A); }
.product-card:nth-child(4) .product-icon { background: linear-gradient(135deg, #6B3FA0, #8B5FC0); }
.product-card:nth-child(5) .product-icon { background: linear-gradient(135deg, #1A8A6B, #2EB88E); }
.product-card:nth-child(6) .product-icon { background: linear-gradient(135deg, #E05050, #F07070); }
.product-card:nth-child(7) .product-icon { background: linear-gradient(135deg, #2E7D32, #4CAF50); }

.product-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--primary);
}

.product-card .product-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--bg-light);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  border-radius: 20px;
  margin-bottom: 14px;
}

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

/* ========================================
   服务卡片
   ======================================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 32px;
}

.service-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.service-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--accent), #C5E53A);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 24px;
  margin-bottom: 20px;
}

.service-card h3 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 14px;
  color: var(--primary);
}

.service-card ul {
  margin-top: 16px;
}

.service-card ul li {
  padding: 8px 0;
  font-size: 15px;
  color: var(--text-light);
  padding-left: 20px;
  position: relative;
}

.service-card ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 16px;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

/* ========================================
   数据统计
   ======================================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.stat-item {
  text-align: center;
  padding: 32px 24px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition);
}

.stat-item:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.stat-number {
  font-size: 42px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 8px;
}

.stat-label {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.75);
}

/* ========================================
   公司介绍
   ======================================== */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-text h3 {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 20px;
}

.about-text p {
  font-size: 16px;
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 16px;
}

.about-text .highlight {
  color: var(--accent);
  font-weight: 600;
}

.about-image {
  background: linear-gradient(135deg, var(--bg-light), #e8ecf1);
  border-radius: var(--radius-lg);
  min-height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.about-image::before {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
  opacity: 0.15;
  border-radius: 50%;
}

.about-image-inner {
  text-align: center;
  padding: 40px;
  position: relative;
  z-index: 1;
}

.about-image-icon {
  font-size: 80px;
  margin-bottom: 16px;
}

/* ========================================
   合作伙伴
   ======================================== */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 20px;
}

.partner-item {
  background: #fff;
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 80px;
  border: 1px solid var(--border);
  transition: var(--transition);
  overflow: hidden;
}

.partner-item img {
  max-width: 100%;
  max-height: 70px;
  width: auto;
  height: auto;
  object-fit: contain;
  filter: grayscale(30%);
  transition: var(--transition);
}

.partner-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

.partner-item:hover img {
  filter: grayscale(0%);
}

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

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr) repeat(3, 1fr);
  gap: 28px 24px;
  margin-bottom: 48px;
}

.footer-brand .logo {
  color: #fff;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.7;
  max-width: 300px;
}

.footer-links h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
  color: #fff;
}

.footer-links ul li {
  margin-bottom: 12px;
}

.footer-links ul li a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
}

.footer-links ul li a:hover {
  color: var(--accent);
}

.footer-contact p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

/* ========================================
   页面标题栏
   ======================================== */
.page-header {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  color: #fff;
  padding: 140px 0 60px;
  margin-top: var(--header-height);
  text-align: center;
}

.page-header h1 {
  font-size: 40px;
  font-weight: 700;
  margin-bottom: 12px;
}

.page-header p {
  font-size: 17px;
  opacity: 0.8;
  max-width: 600px;
  margin: 0 auto;
}

/* ========================================
   关于我们 - 时间线
   ======================================== */
.timeline {
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  padding-bottom: 32px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -32px;
  top: 4px;
  width: 14px;
  height: 14px;
  background: var(--accent);
  border-radius: 50%;
  border: 3px solid #fff;
  box-shadow: 0 0 0 2px var(--accent);
}

.timeline-item h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 6px;
}

.timeline-item p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.6;
}

/* ========================================
   响应式
   ======================================== */
@media (max-width: 1024px) {
  .hero-visual {
    display: none;
  }

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

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }

  .nav {
    display: none;
  }

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

  .mobile-nav.open {
    display: block;
  }

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

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

  .section {
    padding: 56px 0;
  }

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

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

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

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .stat-number {
    font-size: 32px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .page-header h1 {
    font-size: 28px;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 26px;
  }

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

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

  .hero-btns {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}

/* ========================================
   新闻资讯
   ======================================== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
}

.news-item {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border);
  text-align: center;
}

.news-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}

.news-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 20px;
}

.news-item h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 8px;
}

.news-item p {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.6;
}

/* ========================================
   动画
   ======================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
}

/* 滚动显示 */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: all 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}