/* ============================================
   石家庄利鼎电子材料有限公司 - 官网样式
   简约大气 · 工业科技风
   ============================================ */

/* ---------- CSS 变量 ---------- */
:root {
  --primary: #0d4f7c;
  --primary-dark: #093d61;
  --primary-light: #1a7cb8;
  --accent: #e8853a;
  --accent-dark: #d07428;
  --dark: #1a2332;
  --gray-900: #1f2937;
  --gray-700: #374151;
  --gray-600: #4b5563;
  --gray-500: #6b7280;
  --gray-400: #9ca3af;
  --gray-300: #d1d5db;
  --gray-200: #e5e7eb;
  --gray-100: #f3f4f6;
  --gray-50: #f8f9fa;
  --white: #ffffff;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,.1);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.12);
  --radius: 8px;
  --radius-lg: 16px;
  --container: 1200px;
  --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --transition: all .3s ease;
}

/* ---------- Reset ---------- */
*,*::before,*::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; font-size:16px; }
body {
  font-family: var(--font);
  color: var(--gray-700);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}
a { text-decoration:none; color:inherit; transition:var(--transition); }
ul { list-style:none; }
img { max-width:100%; display:block; }

/* ---------- 通用容器 ---------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 80px 0; }
.section-title {
  text-align:center;
  margin-bottom: 16px;
}
.section-title h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--dark);
  letter-spacing: 2px;
}
.section-title .subtitle {
  display:block;
  font-size: .9rem;
  color: var(--gray-500);
  margin-top: 8px;
  letter-spacing: 3px;
  text-transform: uppercase;
}
.section-title .divider {
  width: 50px;
  height: 3px;
  background: var(--accent);
  margin: 20px auto 0;
  border-radius: 2px;
}

/* ---------- 按钮 ---------- */
.btn {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding: 14px 36px;
  border-radius: var(--radius);
  font-size: .95rem;
  font-weight: 600;
  cursor:pointer;
  border:none;
  transition:var(--transition);
  letter-spacing:1px;
}
.btn-primary {
  background: var(--accent);
  color: var(--white);
}
.btn-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(232,133,58,.35);
}
.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid var(--white);
}
.btn-outline:hover {
  background: var(--white);
  color: var(--primary);
}
.btn-dark {
  background: var(--primary);
  color: var(--white);
}
.btn-dark:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(13,79,124,.3);
}

/* ---------- 顶部信息栏 ---------- */
.topbar {
  background: var(--primary-dark);
  color: rgba(255,255,255,.8);
  font-size: .82rem;
  padding: 8px 0;
}
.topbar .container {
  display:flex;
  justify-content:space-between;
  align-items:center;
}
.topbar .topbar-info {
  display:flex;
  gap: 28px;
}
.topbar .topbar-info span {
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.topbar .topbar-info svg {
  width:14px; height:14px;
  opacity:.7;
}
.topbar .topbar-social {
  display:flex;
  gap: 16px;
}
.topbar .topbar-social a:hover { color:var(--accent); }

/* ---------- 导航栏 ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 999;
  background: var(--white);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.header.scrolled { box-shadow: var(--shadow-md); }
.nav {
  display:flex;
  justify-content:space-between;
  align-items:center;
  height: 76px;
}
.logo {
  display:flex;
  align-items:center;
  gap: 12px;
  flex-shrink: 0;
}
.logo-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 10px;
  display:flex;
  align-items:center;
  justify-content:center;
  color: var(--white);
  font-weight: 700;
  font-size: 1.3rem;
  flex-shrink:0;
}
.logo-text { line-height:1.3; }
.logo-text .name {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--dark);
  letter-spacing:1px;
}
.logo-text .en {
  font-size: .68rem;
  color: var(--gray-400);
  letter-spacing: 1px;
  text-transform: uppercase;
}
.nav-menu {
  display:flex;
  gap: 6px;
  align-items:center;
}
.nav-menu a {
  padding: 8px 18px;
  font-size: .95rem;
  font-weight: 500;
  color: var(--gray-700);
  border-radius: var(--radius);
  position:relative;
}
.nav-menu a::after {
  content:'';
  position:absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: var(--transition);
  border-radius: 1px;
}
.nav-menu a:hover { color: var(--primary); }
.nav-menu a:hover::after,
.nav-menu a.active::after { width: 24px; }
.nav-menu a.active { color: var(--primary); font-weight:600; }

.nav-toggle {
  display:none;
  flex-direction:column;
  gap:5px;
  cursor:pointer;
  padding: 8px;
  background:none;
  border:none;
}
.nav-toggle span {
  width:26px;
  height:2px;
  background: var(--dark);
  border-radius:2px;
  transition:var(--transition);
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity:0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 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%);
  overflow:hidden;
}
.hero::before {
  content:'';
  position:absolute;
  top:0; left:0; right:0; bottom:0;
  background:
    radial-gradient(circle at 20% 50%, rgba(232,133,58,.12) 0%, transparent 50%),
    radial-gradient(circle at 80% 30%, rgba(255,255,255,.06) 0%, transparent 40%);
}
.hero::after {
  content:'';
  position:absolute;
  bottom:0; left:0; right:0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}
.hero-pattern {
  position:absolute;
  top:0; right:0;
  width:50%;
  height:100%;
  opacity:.06;
  background-image:
    linear-gradient(rgba(255,255,255,.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.5) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: linear-gradient(to left, rgba(0,0,0,1), transparent);
  -webkit-mask-image: linear-gradient(to left, rgba(0,0,0,1), transparent);
}
.hero-content {
  position:relative;
  z-index:2;
  color: var(--white);
  max-width: 680px;
}
.hero-tag {
  display:inline-block;
  padding: 6px 18px;
  background: rgba(232,133,58,.2);
  border: 1px solid rgba(232,133,58,.4);
  border-radius: 50px;
  font-size: .85rem;
  color: #ffb888;
  margin-bottom: 24px;
  letter-spacing:1px;
}
.hero h1 {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing:2px;
}
.hero h1 .highlight { color: var(--accent); }
.hero p {
  font-size: 1.1rem;
  line-height: 1.8;
  color: rgba(255,255,255,.8);
  margin-bottom: 36px;
  max-width: 560px;
}
.hero-buttons { display:flex; gap:16px; flex-wrap:wrap; }
.hero-stats {
  display:flex;
  gap: 48px;
  margin-top: 56px;
  padding-top: 36px;
  border-top: 1px solid rgba(255,255,255,.15);
}
.hero-stat .num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--accent);
}
.hero-stat .label {
  font-size: .85rem;
  color: rgba(255,255,255,.6);
  letter-spacing:1px;
}

/* ---------- 公司简介 ---------- */
.about-preview {
  background: var(--white);
}
.about-preview .container {
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items:center;
}
.about-preview-img {
  position:relative;
  border-radius: var(--radius-lg);
  overflow:hidden;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
  min-height: 420px;
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow: var(--shadow-lg);
}
.about-preview-img .factory-svg {
  width: 80%;
  height: auto;
  opacity:.9;
}
.about-preview-img .badge {
  position:absolute;
  bottom: 24px;
  right: 24px;
  background: var(--white);
  padding: 16px 24px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  text-align:center;
}
.about-preview-img .badge .num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent);
}
.about-preview-img .badge .label {
  font-size: .8rem;
  color: var(--gray-500);
}
.about-preview-text h2 {
  font-size: 1.8rem;
  font-weight:700;
  color: var(--dark);
  margin-bottom: 8px;
}
.about-preview-text .subtitle {
  font-size: .9rem;
  color: var(--gray-400);
  letter-spacing: 2px;
  margin-bottom: 24px;
}
.about-preview-text p {
  color: var(--gray-600);
  margin-bottom: 16px;
  line-height: 1.9;
}
.about-preview-features {
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 28px 0 32px;
}
.about-preview-features li {
  display:flex;
  align-items:center;
  gap:10px;
  font-size: .92rem;
  color: var(--gray-700);
}
.about-preview-features svg {
  width:20px; height:20px;
  color: var(--accent);
  flex-shrink:0;
}

/* ---------- 产品概览 ---------- */
.products-overview {
  background: var(--gray-50);
}
.products-grid {
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 48px;
}
.product-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow:hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--gray-200);
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}
.product-card-icon {
  height: 160px;
  display:flex;
  align-items:center;
  justify-content:center;
  background: linear-gradient(135deg, var(--gray-50), var(--gray-100));
  transition: var(--transition);
}
.product-card:hover .product-card-icon {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
}
.product-card-icon svg {
  width: 64px;
  height: 64px;
  color: var(--primary);
  transition: var(--transition);
}
.product-card:hover .product-card-icon svg {
  color: var(--white);
}
.product-card-body {
  padding: 28px;
}
.product-card-body h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 10px;
}
.product-card-body p {
  font-size: .9rem;
  color: var(--gray-500);
  line-height: 1.7;
  margin-bottom: 16px;
}
.product-card-body .tag {
  display:inline-block;
  padding: 4px 12px;
  background: var(--gray-100);
  border-radius: 50px;
  font-size: .78rem;
  color: var(--gray-600);
  margin-right: 6px;
}

/* ---------- 核心优势 ---------- */
.advantages {
  background: var(--white);
}
.advantages-grid {
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  margin-top: 48px;
}
.advantage-item {
  text-align:center;
  padding: 36px 24px;
  border-radius: var(--radius-lg);
  transition: var(--transition);
  background: var(--white);
  border: 2px solid transparent;
}
.advantage-item:hover {
  border-color: var(--primary-light);
  background: var(--gray-50);
  transform: translateY(-4px);
}
.advantage-item .icon-wrap {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display:flex;
  align-items:center;
  justify-content:center;
}
.advantage-item .icon-wrap svg {
  width: 34px; height: 34px;
  color: var(--white);
}
.advantage-item h3 {
  font-size: 1.1rem;
  font-weight:600;
  color: var(--dark);
  margin-bottom: 10px;
}
.advantage-item p {
  font-size: .88rem;
  color: var(--gray-500);
  line-height: 1.7;
}

/* ---------- CTA 区域 ---------- */
.cta-section {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  position:relative;
  overflow:hidden;
}
.cta-section::before {
  content:'';
  position:absolute;
  top:-50%; right:-10%;
  width: 400px;
  height: 400px;
  border-radius:50%;
  background: rgba(232,133,58,.1);
}
.cta-content {
  position:relative;
  z-index:2;
  text-align:center;
  color: var(--white);
  max-width: 680px;
  margin: 0 auto;
}
.cta-content h2 {
  font-size: 2rem;
  font-weight:700;
  margin-bottom: 16px;
}
.cta-content p {
  color: rgba(255,255,255,.8);
  margin-bottom: 32px;
  font-size: 1.05rem;
}

/* ---------- 页面通用 Banner ---------- */
.page-banner {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
  padding: 80px 0 70px;
  text-align:center;
  color: var(--white);
  position:relative;
  overflow:hidden;
}
.page-banner::before {
  content:'';
  position:absolute;
  top:0; left:0; right:0; bottom:0;
  background:
    radial-gradient(circle at 30% 50%, rgba(232,133,58,.1) 0%, transparent 50%);
}
.page-banner::after {
  content:'';
  position:absolute;
  bottom:0; left:0; right:0;
  height:1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}
.page-banner h1 {
  position:relative;
  z-index:2;
  font-size: 2.4rem;
  font-weight: 700;
  letter-spacing:3px;
  margin-bottom: 12px;
}
.page-banner .breadcrumb {
  position:relative;
  z-index:2;
  font-size: .9rem;
  color: rgba(255,255,255,.6);
}
.page-banner .breadcrumb a:hover { color:var(--accent); }

/* ---------- 关于我们页面 ---------- */
.about-section { background: var(--white); }
.about-content {
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}
.about-text h3 {
  font-size: 1.4rem;
  color: var(--dark);
  margin-bottom: 16px;
  font-weight: 600;
}
.about-text p {
  color: var(--gray-600);
  margin-bottom: 16px;
  line-height: 1.9;
}
.about-text .quote {
  border-left: 4px solid var(--accent);
  padding: 16px 24px;
  background: var(--gray-50);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 24px 0;
  font-style: italic;
  color: var(--gray-700);
}
.about-visual {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
  border-radius: var(--radius-lg);
  min-height: 400px;
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow: var(--shadow-lg);
  position:relative;
  overflow:hidden;
}
.about-visual svg { width: 80%; height: auto; opacity:.9; }

/* 发展历程 */
.timeline-section { background: var(--gray-50); }
.timeline {
  max-width: 800px;
  margin: 48px auto 0;
  position:relative;
}
.timeline::before {
  content:'';
  position:absolute;
  left: 50%;
  top:0; bottom:0;
  width: 2px;
  background: var(--gray-200);
  transform: translateX(-50%);
}
.timeline-item {
  display:flex;
  align-items:center;
  margin-bottom: 40px;
  position:relative;
}
.timeline-item:nth-child(even) { flex-direction: row-reverse; }
.timeline-item .timeline-content {
  width: 45%;
  background: var(--white);
  padding: 24px 28px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
}
.timeline-item .timeline-content .year {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 8px;
}
.timeline-item .timeline-content h4 {
  font-size: 1.05rem;
  color: var(--dark);
  margin-bottom: 8px;
}
.timeline-item .timeline-content p {
  font-size: .88rem;
  color: var(--gray-500);
  line-height: 1.7;
}
.timeline-item .timeline-dot {
  position:absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 16px;
  border-radius:50%;
  background: var(--accent);
  border: 4px solid var(--white);
  box-shadow: 0 0 0 2px var(--accent);
}

/* 企业文化 */
.culture-section { background: var(--white); }
.culture-grid {
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 48px;
}
.culture-card {
  text-align:center;
  padding: 40px 28px;
  border-radius: var(--radius-lg);
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  transition: var(--transition);
}
.culture-card:hover {
  background: var(--white);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.culture-card .icon-circle {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  border-radius:50%;
  background: var(--white);
  border: 2px solid var(--accent);
  display:flex;
  align-items:center;
  justify-content:center;
}
.culture-card .icon-circle svg {
  width: 30px; height: 30px;
  color: var(--accent);
}
.culture-card h3 {
  font-size: 1.15rem;
  color: var(--dark);
  margin-bottom: 12px;
  font-weight:600;
}
.culture-card p {
  font-size: .9rem;
  color: var(--gray-500);
  line-height: 1.8;
}

/* 资质专利 */
.cert-section { background: var(--gray-50); }
.cert-grid {
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.cert-item {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px 20px;
  text-align:center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--gray-200);
}
.cert-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.cert-item svg {
  width: 48px; height: 48px;
  color: var(--primary);
  margin: 0 auto 16px;
}
.cert-item h4 {
  font-size: 1rem;
  color: var(--dark);
  margin-bottom: 6px;
}
.cert-item p {
  font-size: .82rem;
  color: var(--gray-500);
}

/* ---------- 产品服务页面 ---------- */
.products-page { background: var(--white); }
.products-detail-grid {
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-top: 48px;
}
.product-detail-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow:hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--gray-200);
  display:flex;
  flex-direction:column;
}
.product-detail-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}
.product-detail-header {
  padding: 32px 32px 20px;
  display:flex;
  align-items:flex-start;
  gap: 20px;
  background: var(--gray-50);
  border-bottom: 1px solid var(--gray-200);
}
.product-detail-header .icon-box {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display:flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
}
.product-detail-header .icon-box svg {
  width: 28px; height: 28px;
  color: var(--white);
}
.product-detail-header h3 {
  font-size: 1.25rem;
  font-weight:600;
  color: var(--dark);
  margin-bottom: 4px;
}
.product-detail-header .en {
  font-size: .78rem;
  color: var(--gray-400);
  letter-spacing:1px;
}
.product-detail-body {
  padding: 24px 32px 32px;
  flex:1;
  display:flex;
  flex-direction:column;
}
.product-detail-body p {
  color: var(--gray-600);
  font-size: .92rem;
  line-height: 1.8;
  margin-bottom: 20px;
}
.product-detail-body .features {
  display:flex;
  flex-wrap:wrap;
  gap: 8px;
  margin-top: auto;
}
.product-detail-body .features li {
  padding: 6px 14px;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: 50px;
  font-size: .8rem;
  color: var(--gray-600);
}

/* 应用领域 */
.applications-section { background: var(--gray-50); }
.app-grid {
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.app-item {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  text-align:center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--gray-200);
}
.app-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.app-item .app-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 16px;
  border-radius: 12px;
  background: var(--gray-50);
  display:flex;
  align-items:center;
  justify-content:center;
  transition: var(--transition);
}
.app-item:hover .app-icon {
  background: var(--primary);
}
.app-item .app-icon svg {
  width: 30px; height: 30px;
  color: var(--primary);
  transition: var(--transition);
}
.app-item:hover .app-icon svg {
  color: var(--white);
}
.app-item h3 {
  font-size: 1.05rem;
  color: var(--dark);
  margin-bottom: 8px;
  font-weight:600;
}
.app-item p {
  font-size: .85rem;
  color: var(--gray-500);
}

/* ---------- 联系我们页面 ---------- */
.contact-section { background: var(--white); }
.contact-layout {
  display:grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  margin-top: 48px;
}
.contact-info-list { }
.contact-info-item {
  display:flex;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--gray-200);
}
.contact-info-item:last-child { border-bottom:none; }
.contact-info-item .ci-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display:flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
}
.contact-info-item .ci-icon svg {
  width: 24px; height: 24px;
  color: var(--white);
}
.contact-info-item .ci-text h4 {
  font-size: 1rem;
  color: var(--dark);
  margin-bottom: 6px;
}
.contact-info-item .ci-text p {
  font-size: .92rem;
  color: var(--gray-600);
  line-height: 1.6;
}

.contact-form-wrap {
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  padding: 40px;
  border: 1px solid var(--gray-200);
}
.contact-form-wrap h3 {
  font-size: 1.3rem;
  color: var(--dark);
  margin-bottom: 8px;
}
.contact-form-wrap .form-sub {
  font-size: .9rem;
  color: var(--gray-500);
  margin-bottom: 28px;
}
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display:block;
  font-size: .88rem;
  color: var(--gray-700);
  margin-bottom: 8px;
  font-weight: 500;
}
.form-group input,
.form-group textarea,
.form-group select {
  width:100%;
  padding: 12px 16px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: .92rem;
  font-family: var(--font);
  background: var(--white);
  transition: var(--transition);
  color: var(--gray-700);
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline:none;
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(26,124,184,.12);
}
.form-group textarea {
  resize: vertical;
  min-height: 120px;
}
.form-row {
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.form-submit {
  width:100%;
  padding: 14px;
  font-size: 1rem;
}
.form-success {
  display:none;
  padding: 16px 20px;
  background: #e8f5e9;
  border: 1px solid #81c784;
  border-radius: var(--radius);
  color: #2e7d32;
  font-size: .92rem;
  margin-top: 16px;
}
.form-success.show { display:block; }

/* 地图区域 */
.map-section {
  background: var(--gray-50);
}
.map-wrap {
  margin-top: 48px;
  border-radius: var(--radius-lg);
  overflow:hidden;
  box-shadow: var(--shadow-md);
  background: var(--white);
}
.map-wrap iframe {
  width:100%;
  height: 400px;
  border:none;
  display:block;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--dark);
  color: rgba(255,255,255,.7);
  padding: 60px 0 0;
}
.footer-main {
  display:grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.footer-col h4 {
  color: var(--white);
  font-size: 1.05rem;
  margin-bottom: 20px;
  font-weight: 600;
}
.footer-col p {
  font-size: .9rem;
  line-height: 1.8;
  margin-bottom: 12px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul li a {
  font-size: .9rem;
  color: rgba(255,255,255,.6);
}
.footer-col ul li a:hover {
  color: var(--accent);
}
.footer-logo {
  display:flex;
  align-items:center;
  gap: 12px;
  margin-bottom: 16px;
}
.footer-logo .logo-icon {
  width: 40px; height: 40px;
  font-size: 1.1rem;
}
.footer-logo .name {
  font-size: 1.05rem;
  font-weight:700;
  color: var(--white);
}
.footer-contact-item {
  display:flex;
  gap:10px;
  margin-bottom: 12px;
  font-size: .88rem;
}
.footer-contact-item svg {
  width:18px; height:18px;
  color: var(--accent);
  flex-shrink:0;
  margin-top:2px;
}
.footer-bottom {
  padding: 20px 0;
  text-align:center;
  font-size: .82rem;
  color: rgba(255,255,255,.4);
}
.footer-bottom a { color: rgba(255,255,255,.4); }
.footer-bottom a:hover { color: var(--accent); }

/* ---------- 回到顶部 ---------- */
.back-to-top {
  position:fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  border-radius:50%;
  background: var(--primary);
  color: var(--white);
  display:flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  box-shadow: var(--shadow-md);
  opacity:0;
  visibility:hidden;
  transition: var(--transition);
  z-index: 998;
  border:none;
}
.back-to-top.show {
  opacity:1;
  visibility:visible;
}
.back-to-top:hover {
  background: var(--accent);
  transform: translateY(-4px);
}
.back-to-top svg { width:22px; height:22px; }

/* ---------- 动画 ---------- */
.fade-up {
  opacity:0;
  transform: translateY(30px);
  transition: opacity .6s ease, transform .6s ease;
}
.fade-up.in-view {
  opacity:1;
  transform: translateY(0);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .culture-grid { grid-template-columns: repeat(2, 1fr); }
  .app-grid { grid-template-columns: repeat(2, 1fr); }
  .products-detail-grid { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .topbar { display:none; }
  .nav-menu {
    position:fixed;
    top: 76px;
    left:0;
    right:0;
    background: var(--white);
    flex-direction:column;
    padding: 16px 0;
    box-shadow: var(--shadow-md);
    gap:0;
    transform: translateY(-100%);
    opacity:0;
    visibility:hidden;
    transition: var(--transition);
  }
  .nav-menu.open {
    transform: translateY(0);
    opacity:1;
    visibility:visible;
  }
  .nav-menu a {
    width:100%;
    padding: 14px 24px;
    border-radius:0;
  }
  .nav-menu a::after { display:none; }
  .nav-toggle { display:flex; }

  .hero { min-height: 500px; }
  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 1rem; }
  .hero-stats { gap: 24px; }
  .hero-stat .num { font-size: 1.6rem; }

  .section { padding: 56px 0; }
  .section-title h2 { font-size: 1.6rem; }

  .about-preview .container,
  .about-content,
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .products-grid,
  .advantages-grid,
  .cert-grid,
  .culture-grid,
  .app-grid {
    grid-template-columns: 1fr;
  }
  .footer-main { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .about-preview-features { grid-template-columns: 1fr; }

  .timeline::before { left: 20px; }
  .timeline-item,
  .timeline-item:nth-child(even) {
    flex-direction: row;
    padding-left: 50px;
  }
  .timeline-item .timeline-content { width:100%; }
  .timeline-item .timeline-dot { left: 20px; }

  .page-banner h1 { font-size: 1.8rem; }
  .contact-form-wrap { padding: 28px 20px; }
}

/* ===== 新闻 / 文章 模块 ===== */
:root{
  --line:#e3e8ef;
  --accent:#e8853a;
  --muted:#6b7785;
}
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;}
.post-card{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:.25s;}
.post-card:hover{transform:translateY(-4px);box-shadow:0 12px 30px rgba(13,79,124,.12);}
.post-cover{display:block;height:180px;background:#0d4f7c;}
.post-body{padding:22px;}
.post-meta{display:flex;gap:12px;align-items:center;font-size:12px;color:var(--muted);margin-bottom:10px;flex-wrap:wrap;}
.post-meta .cat{background:rgba(13,79,124,.08);color:var(--primary);padding:2px 10px;border-radius:20px;}
.post-body h3{font-size:17px;line-height:1.5;margin-bottom:10px;}
.post-body h3 a:hover{color:var(--accent);}
.post-body p{color:var(--muted);font-size:14px;line-height:1.7;margin-bottom:14px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.post-more{color:var(--primary);font-size:13px;font-weight:600;}
.post-more:hover{color:var(--accent);}

.post-detail{max-width:820px;margin:0 auto;}
.post-detail-cover{height:320px;border-radius:12px;margin-bottom:24px;background:#0d4f7c;}
.post-detail .post-meta{margin:18px 0 12px;}
.post-detail h1{font-size:28px;line-height:1.4;margin-bottom:18px;}
.post-content{font-size:15px;line-height:2;color:#33414f;}
.post-content p{margin-bottom:18px;}
.post-detail .btn{margin-top:30px;}

@media(max-width:900px){.post-grid{grid-template-columns:repeat(2,1fr);}}
@media(max-width:600px){.post-grid{grid-template-columns:1fr;}}