/* ============================================
   四川腾龙装备制造有限公司 - 企业官网样式
   ============================================ */

/* CSS 变量 */
:root {
  --color-primary: #C41E3A;
  --color-primary-dark: #9E1730;
  --color-black: #1A1A1A;
  --color-gray-dark: #2D2D2D;
  --color-gray: #666666;
  --color-gray-light: #999999;
  --color-bg: #F5F5F5;
  --color-white: #FFFFFF;
  --color-text: #333333;
  --color-border: #E0E0E0;

  --font-heading: "Noto Serif SC", "SimSun", serif;
  --font-body: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-english: "Oswald", "Arial", sans-serif;

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.16);

  --transition: 0.3s ease;
  --max-width: 1400px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-white);
  overflow-x: hidden;
}

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

ul, ol {
  list-style: none;
}

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

/* 工具类 */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 60px;
}

.section {
  padding: 100px 0;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 42px;
  font-weight: 700;
  color: var(--color-black);
  text-align: center;
  margin-bottom: 20px;
}

.section-subtitle {
  font-size: 18px;
  color: var(--color-gray);
  text-align: center;
  margin-bottom: 60px;
}

.section-title::after {
  content: '';
  display: block;
  width: 80px;
  height: 3px;
  background: var(--color-primary);
  margin: 20px auto 0;
}

/* 按钮 */
.btn {
  display: inline-block;
  padding: 14px 36px;
  font-size: 16px;
  font-weight: 500;
  text-align: center;
  border-radius: 4px;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
}

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

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

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

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

.btn-white {
  background: transparent;
  color: var(--color-white);
  border-color: var(--color-white);
}

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

/* 动画 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.animate {
  opacity: 0;
}

.animate.active {
  animation: fadeInUp 0.8s ease forwards;
}

/* ============================================
   头部导航
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: var(--transition);
}

.header.transparent {
  background: transparent;
}

.header.scrolled {
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 60px;
  max-width: var(--max-width);
  margin: 0 auto;
}

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

.logo-icon {
  width: 50px;
  height: 50px;
  background: var(--color-primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-english);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-white);
}

.logo-text {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-black);
  line-height: 1.3;
}

.header.transparent .logo-text {
  color: var(--color-white);
}

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

.header.transparent .logo-text span {
  color: rgba(255,255,255,0.8);
}

.nav {
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav-link {
  font-size: 16px;
  font-weight: 500;
  color: var(--color-black);
  position: relative;
  padding: 5px 0;
}

.header.transparent .nav-link {
  color: var(--color-white);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link.active {
  color: var(--color-primary);
}

.header.transparent .nav-link.active {
  color: var(--color-white);
}

/* 汉堡菜单 */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  padding: 10px;
}

.menu-toggle span {
  width: 28px;
  height: 2px;
  background: var(--color-black);
  transition: var(--transition);
}

.header.transparent .menu-toggle span {
  background: var(--color-white);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* 移动端菜单 */
.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: var(--color-white);
  z-index: 999;
  padding: 100px 40px 40px;
  transform: translateX(100%);
  transition: transform 0.4s ease;
}

.mobile-nav.active {
  transform: translateX(0);
}

.mobile-nav a {
  display: block;
  font-size: 24px;
  padding: 15px 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-black);
}

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

/* ============================================
   Hero 区域
   ============================================ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 700px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(196, 30, 58, 0.85) 0%, rgba(26, 26, 26, 0.9) 100%);
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  color: var(--color-white);
  max-width: 900px;
  padding: 0 40px;
}

.hero-subtitle {
  font-family: var(--font-english);
  font-size: 18px;
  letter-spacing: 8px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.9);
  margin-bottom: 20px;
  animation: fadeInUp 1s ease;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 56px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 20px;
  animation: fadeInUp 1s ease 0.2s both;
}

.hero-desc {
  font-size: 20px;
  color: rgba(255,255,255,0.85);
  margin-bottom: 40px;
  animation: fadeInUp 1s ease 0.4s both;
}

.hero-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  animation: fadeInUp 1s ease 0.6s both;
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  color: var(--color-white);
  text-align: center;
  animation: bounce 2s infinite;
}

.hero-scroll-icon {
  width: 30px;
  height: 50px;
  border: 2px solid var(--color-white);
  border-radius: 15px;
  margin: 0 auto 10px;
  position: relative;
}

.hero-scroll-icon::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 10px;
  background: var(--color-white);
  border-radius: 2px;
  animation: scrollDown 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(10px); }
}

@keyframes scrollDown {
  0% { opacity: 1; top: 8px; }
  100% { opacity: 0; top: 30px; }
}

/* ============================================
   内页标题区
   ============================================ */
.page-header {
  position: relative;
  height: 400px;
  min-height: 350px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-top: 90px;
}

.page-header-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
}

.page-header-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(196, 30, 58, 0.9) 0%, rgba(26, 26, 26, 0.95) 100%);
}

.page-header-content {
  position: relative;
  z-index: 10;
  text-align: center;
  color: var(--color-white);
}

.page-header-title {
  font-family: var(--font-heading);
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 15px;
}

.page-header-subtitle {
  font-size: 18px;
  color: rgba(255,255,255,0.85);
}

.page-header-breadcrumb {
  margin-top: 30px;
  font-size: 14px;
  color: rgba(255,255,255,0.7);
}

.page-header-breadcrumb a {
  color: rgba(255,255,255,0.85);
}

.page-header-breadcrumb a:hover {
  color: var(--color-white);
}

.page-header-breadcrumb span {
  margin: 0 10px;
}

/* ============================================
   关于我们
   ============================================ */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-intro-image {
  position: relative;
  height: 500px;
  border-radius: 8px;
  overflow: hidden;
}

.about-intro-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-intro-image::after {
  content: '';
  position: absolute;
  top: 20px;
  left: 20px;
  right: -20px;
  bottom: -20px;
  border: 3px solid var(--color-primary);
  border-radius: 8px;
  z-index: -1;
}

.about-intro-content h3 {
  font-family: var(--font-heading);
  font-size: 36px;
  color: var(--color-black);
  margin-bottom: 20px;
}

.about-intro-content p {
  font-size: 16px;
  color: var(--color-gray);
  margin-bottom: 30px;
  line-height: 1.8;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  background: var(--color-black);
  padding: 60px;
  border-radius: 8px;
  margin-top: 80px;
}

.stat-item {
  text-align: center;
  color: var(--color-white);
}

.stat-number {
  font-family: var(--font-english);
  font-size: 56px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 10px;
}

.stat-label {
  font-size: 16px;
  color: rgba(255,255,255,0.8);
}

/* 发展历程 */
.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 3px;
  height: 100%;
  background: var(--color-border);
}

.timeline-item {
  display: flex;
  margin-bottom: 60px;
  position: relative;
}

.timeline-item:nth-child(odd) {
  flex-direction: row-reverse;
}

.timeline-content {
  width: 45%;
  padding: 30px;
  background: var(--color-white);
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
}

.timeline-year {
  font-family: var(--font-english);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.timeline-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-black);
  margin-bottom: 10px;
}

.timeline-desc {
  font-size: 14px;
  color: var(--color-gray);
}

.timeline-dot {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 20px;
  background: var(--color-primary);
  border-radius: 50%;
  border: 4px solid var(--color-white);
  box-shadow: var(--shadow-sm);
}

/* ============================================
   技术创新
   ============================================ */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.tech-card {
  background: var(--color-white);
  border-radius: 8px;
  padding: 40px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.tech-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 25px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tech-icon svg {
  width: 40px;
  height: 40px;
  stroke: var(--color-white);
  fill: none;
  stroke-width: 2;
}

.tech-title {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 600;
  color: var(--color-black);
  margin-bottom: 15px;
}

.tech-desc {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.7;
}

/* 质量认证 */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.cert-item {
  background: var(--color-white);
  border-radius: 8px;
  padding: 30px;
  text-align: center;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.cert-item:hover {
  border-color: var(--color-primary);
}

.cert-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 15px;
  background: var(--color-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cert-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-black);
}

/* ============================================
   解决方案
   ============================================ */
.solution-categories {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 30px;
  margin-bottom: 80px;
}

.solution-category {
  position: relative;
  height: 280px;
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
}

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

.solution-category:hover img {
  transform: scale(1.1);
}

.solution-category-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 30px 20px;
  background: linear-gradient(to top, rgba(0,0,0,0.9), transparent);
  color: var(--color-white);
}

.solution-category-title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 600;
}

.solution-category-desc {
  font-size: 13px;
  color: rgba(255,255,255,0.8);
  margin-top: 8px;
}

/* 案例展示 */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.case-item {
  background: var(--color-white);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.case-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.case-image {
  height: 220px;
  overflow: hidden;
}

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

.case-item:hover .case-image img {
  transform: scale(1.05);
}

.case-content {
  padding: 25px;
}

.case-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(196, 30, 58, 0.1);
  color: var(--color-primary);
  font-size: 12px;
  border-radius: 4px;
  margin-bottom: 10px;
}

.case-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-black);
  margin-bottom: 10px;
}

.case-desc {
  font-size: 14px;
  color: var(--color-gray);
}

/* ============================================
   产品中心
   ============================================ */
.products-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 50px;
}

.products-sidebar {
  background: var(--color-bg);
  border-radius: 8px;
  padding: 30px;
  height: fit-content;
}

.products-main {
  min-width: 0;
}

.products-main .products-grid {
  margin-bottom: 30px;
}

.products-main .pagination {
  justify-content: center;
}

.sidebar-title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 600;
  color: var(--color-black);
  margin-bottom: 20px;
  padding-bottom: 15px;
  border-bottom: 2px solid var(--color-primary);
}

.filter-list a {
  display: block;
  padding: 12px 15px;
  color: var(--color-gray);
  font-size: 15px;
  border-radius: 4px;
  transition: var(--transition);
}

.filter-list a:hover,
.filter-list a.active {
  background: var(--color-primary);
  color: var(--color-white);
}

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

.product-card {
  background: var(--color-white);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.product-image {
  height: 220px;
  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(1.05);
}

.product-tag {
  position: absolute;
  top: 15px;
  left: 15px;
  padding: 5px 12px;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 12px;
  border-radius: 4px;
}

.product-content {
  padding: 25px;
}

.product-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-black);
  margin-bottom: 10px;
}

.product-desc {
  font-size: 14px;
  color: var(--color-gray);
  margin-bottom: 15px;
  line-height: 1.6;
}

.product-link {
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 500;
}

.product-link:hover {
  text-decoration: underline;
}

/* 产品详情 */
.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.product-gallery {
  position: relative;
}

.product-main-image {
  height: 450px;
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 15px;
}

.product-main-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-thumbnails {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.product-thumb {
  height: 80px;
  border-radius: 4px;
  overflow: hidden;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
}

.product-thumb.active,
.product-thumb:hover {
  border-color: var(--color-primary);
}

.product-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-info h2 {
  font-family: var(--font-heading);
  font-size: 32px;
  color: var(--color-black);
  margin-bottom: 20px;
}

.product-summary {
  font-size: 16px;
  color: var(--color-gray);
  line-height: 1.8;
  margin-bottom: 30px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--color-border);
}

.product-params {
  margin-bottom: 30px;
}

.product-params h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-black);
  margin-bottom: 15px;
}

.params-table {
  width: 100%;
  border-collapse: collapse;
}

.params-table tr {
  border-bottom: 1px solid var(--color-border);
}

.params-table td {
  padding: 12px 0;
  font-size: 14px;
}

.params-table td:first-child {
  color: var(--color-gray);
  width: 120px;
}

.params-table td:last-child {
  color: var(--color-text);
}

/* ============================================
   新闻中心
   ============================================ */
.news-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 50px;
}

.news-main {
  min-width: 0;
}

.news-main .news-grid {
  margin-bottom: 30px;
}

.news-main .pagination {
  justify-content: center;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.news-card {
  background: var(--color-white);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.news-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.news-image {
  height: 200px;
  overflow: hidden;
}

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

.news-card:hover .news-image img {
  transform: scale(1.05);
}

.news-content {
  padding: 25px;
}

.news-meta {
  display: flex;
  gap: 20px;
  margin-bottom: 12px;
  font-size: 13px;
  color: var(--color-gray-light);
}

.news-category {
  color: var(--color-primary);
  font-weight: 500;
}

.news-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-black);
  margin-bottom: 10px;
  line-height: 1.4;
  transition: var(--transition);
}

.news-card:hover .news-title {
  color: var(--color-primary);
}

.news-desc {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 新闻详情 */
.news-article {
  max-width: 900px;
  margin: 0 auto;
}

.news-article-header {
  text-align: center;
  margin-bottom: 40px;
}

.news-article-category {
  display: inline-block;
  padding: 5px 15px;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 13px;
  border-radius: 4px;
  margin-bottom: 20px;
}

.news-article-title {
  font-family: var(--font-heading);
  font-size: 36px;
  color: var(--color-black);
  line-height: 1.3;
  margin-bottom: 20px;
}

.news-article-meta {
  font-size: 14px;
  color: var(--color-gray-light);
}

.news-article-content {
  font-size: 16px;
  line-height: 1.9;
  color: var(--color-text);
}

.news-article-content p {
  margin-bottom: 20px;
}

.news-article-content img {
  max-width: 100%;
  border-radius: 8px;
  margin: 30px 0;
}

.news-article-footer {
  margin-top: 50px;
  padding-top: 30px;
  border-top: 1px solid var(--color-border);
}

.news-nav {
  display: flex;
  justify-content: space-between;
}

.news-nav a {
  font-size: 14px;
  color: var(--color-gray);
  max-width: 45%;
}

.news-nav a:hover {
  color: var(--color-primary);
}

/* ============================================
   联系我们
   ============================================ */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.contact-info {
  background: var(--color-black);
  border-radius: 8px;
  padding: 50px;
  color: var(--color-white);
}

.contact-info h3 {
  font-family: var(--font-heading);
  font-size: 28px;
  margin-bottom: 30px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 30px;
}

.contact-icon {
  width: 50px;
  height: 50px;
  background: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--color-white);
  fill: none;
  stroke-width: 2;
}

.contact-label {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 5px;
}

.contact-value {
  font-size: 16px;
  color: var(--color-white);
  line-height: 1.6;
}

.contact-form {
  background: var(--color-bg);
  border-radius: 8px;
  padding: 50px;
}

.contact-form h3 {
  font-family: var(--font-heading);
  font-size: 28px;
  color: var(--color-black);
  margin-bottom: 30px;
}

.form-group {
  margin-bottom: 25px;
}

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

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 18px;
  font-size: 15px;
  font-family: var(--font-body);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: var(--color-white);
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

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

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

/* 地图 */
.contact-map {
  margin-top: 60px;
  height: 400px;
  background: var(--color-gray-dark);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: 18px;
}

/* ============================================
   合作伙伴
   ============================================ */
.partners {
  background: var(--color-white);
}

.partners-grid {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 60px;
  flex-wrap: wrap;
}

.partner-logo {
  width: 150px;
  height: 60px;
  background: var(--color-bg);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray);
  font-weight: 600;
  transition: var(--transition);
}

.partner-logo:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

/* ============================================
   CTA 区域
   ============================================ */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  padding: 100px 0;
  text-align: center;
  color: var(--color-white);
}

.cta-section h2 {
  font-family: var(--font-heading);
  font-size: 42px;
  margin-bottom: 20px;
}

.cta-section p {
  font-size: 18px;
  color: rgba(255,255,255,0.9);
  margin-bottom: 40px;
}

/* ============================================
   底部
   ============================================ */
.footer {
  background: var(--color-black);
  color: var(--color-white);
  padding: 80px 0 30px;
}

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

.footer-about h4 {
  font-family: var(--font-heading);
  font-size: 22px;
  margin-bottom: 20px;
}

.footer-about p {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  line-height: 1.8;
}

.footer-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 25px;
}

.footer-links a {
  display: block;
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  padding: 8px 0;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  color: rgba(255,255,255,0.5);
}

/* ============================================
   分页
   ============================================ */
.pagination {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 60px;
}

.pagination a,
.pagination span {
  display: inline-block;
  padding: 10px 16px;
  font-size: 14px;
  border-radius: 4px;
  background: var(--color-bg);
  color: var(--color-gray);
  transition: var(--transition);
}

.pagination a:hover,
.pagination .active {
  background: var(--color-primary);
  color: var(--color-white);
}

/* ============================================
   响应式
   ============================================ */
@media (max-width: 1200px) {
  .container {
    padding: 0 40px;
  }

  .about-intro {
    gap: 50px;
  }

  .about-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
  }

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

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

@media (max-width: 992px) {
  .header-inner {
    padding: 15px 30px;
  }

  .nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .mobile-nav {
    display: block;
  }

  .hero-title {
    font-size: 42px;
  }

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

  .about-intro-image {
    height: 350px;
  }

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

  .products-sidebar,
  .news-sidebar {
    display: none;
  }

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

  .product-detail {
    grid-template-columns: 1fr;
  }

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

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

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

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

@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }

  .section {
    padding: 60px 0;
  }

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

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

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

  .hero-buttons {
    flex-direction: column;
    gap: 15px;
  }

  .page-header {
    height: 300px;
    margin-top: 70px;
  }

  .page-header-title {
    font-size: 32px;
  }

  .about-stats {
    grid-template-columns: 1fr 1fr;
    padding: 40px 30px;
  }

  .stat-number {
    font-size: 36px;
  }

  .timeline::before {
    left: 20px;
  }

  .timeline-item,
  .timeline-item:nth-child(odd) {
    flex-direction: row;
  }

  .timeline-content {
    width: calc(100% - 50px);
    margin-left: 50px;
  }

  .timeline-dot {
    left: 20px;
  }

  .tech-grid,
  .cert-grid,
  .case-grid,
  .products-grid,
  .news-grid {
    grid-template-columns: 1fr;
  }

  .solution-categories {
    grid-template-columns: 1fr;
  }

  .solution-category {
    height: 200px;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 15px;
    text-align: center;
  }

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