/* ================================================
   辰翔航天官网 - 主样式文件
   颜色说明：
   --primary: 深蓝主色
   --accent:  金色点缀
   修改处：搜索 【可修改】 快速定位可替换内容
   ================================================ */

:root {
  --primary: #0A1628;
  --primary-light: #122040;
  --accent: #C8A96E;
  --accent-light: #E8C98A;
  --text-light: #F0F4FF;
  --text-muted: #8A9BB8;
  --bg-light: #F5F7FA;
  --bg-card: #FFFFFF;
  --border: #E2E8F0;
  --shadow: 0 4px 24px rgba(10,22,40,0.10);
  --shadow-hover: 0 8px 40px rgba(10,22,40,0.18);
  --radius: 10px;
  --transition: 0.28s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

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

body {
  font-family: 'Source Han Sans CN', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  color: #1A2840;
  background: #fff;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }

/* ===== 导航栏 ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(10,22,40,0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(200,169,110,0.18);
  transition: background var(--transition);
}

.nav-inner {
  max-width: 1260px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px; height: 68px;
}

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

.nav-logo-icon {
  width: 40px; height: 40px;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 900; color: var(--primary);
  letter-spacing: -1px;
}

.nav-logo-text {
  display: flex; flex-direction: column;
}

.nav-logo-cn {
  font-size: 17px; font-weight: 700; color: #fff;
  letter-spacing: 1px; line-height: 1.2;
}

.nav-logo-en {
  font-size: 10px; color: var(--accent); letter-spacing: 2px; text-transform: uppercase;
}

.nav-links {
  display: flex; align-items: center; gap: 6px; list-style: none;
}

.nav-links a {
  padding: 8px 18px; border-radius: 6px;
  color: rgba(240,244,255,0.85); font-size: 14px; font-weight: 500;
  transition: all var(--transition); letter-spacing: 0.5px;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  background: rgba(200,169,110,0.10);
}

.nav-cta {
  background: var(--accent) !important;
  color: var(--primary) !important;
  font-weight: 700 !important;
  padding: 8px 20px !important;
}

.nav-cta:hover { background: var(--accent-light) !important; }

.hamburger {
  display: none;
  flex-direction: column; gap: 5px; cursor: pointer; padding: 8px;
}

.hamburger span {
  display: block; width: 24px; height: 2px;
  background: #fff; border-radius: 2px; transition: all 0.3s;
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  display: none;
  background: var(--primary);
  border-top: 1px solid rgba(200,169,110,0.15);
  padding: 12px 24px 20px;
}

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

.mobile-menu a {
  display: block; padding: 12px 0;
  color: rgba(240,244,255,0.85); font-size: 15px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

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

/* ===== 通用容器 ===== */
.container {
  max-width: 1260px; margin: 0 auto; padding: 0 24px;
}

/* ===== 区块标题 ===== */
.section-header {
  text-align: center; margin-bottom: 56px;
}

.section-tag {
  display: inline-block;
  font-size: 12px; font-weight: 700; letter-spacing: 3px; text-transform: uppercase;
  color: var(--accent);
  background: rgba(200,169,110,0.10);
  border: 1px solid rgba(200,169,110,0.25);
  padding: 5px 16px; border-radius: 30px; margin-bottom: 14px;
}

.section-title {
  font-size: clamp(24px, 3vw, 38px);
  font-weight: 800; color: var(--primary);
  line-height: 1.25; letter-spacing: 0.5px;
}

.section-title span { color: var(--accent); }

.section-desc {
  margin-top: 14px; font-size: 16px;
  color: #5A7090; max-width: 560px; margin-left: auto; margin-right: auto;
}

.section-divider {
  width: 48px; height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
  margin: 16px auto 0;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: 8px;
  font-size: 15px; font-weight: 600; cursor: pointer;
  transition: all var(--transition); letter-spacing: 0.5px;
  border: none;
}

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

.btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(200,169,110,0.35);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.45);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

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

.btn-dark:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

/* ===== Hero Banner ===== */
.hero {
  min-height: 100vh;
  background: linear-gradient(155deg, var(--primary) 0%, #1B3060 55%, #0D1E3A 100%);
  display: flex; align-items: center;
  position: relative; overflow: hidden; padding-top: 68px;
}

.hero::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 80% 50%, rgba(200,169,110,0.08) 0%, transparent 70%),
    radial-gradient(ellipse 40% 60% at 10% 80%, rgba(20,60,120,0.5) 0%, transparent 60%);
}

.hero-grid {
  position: absolute; inset: 0; opacity: 0.04;
  background-image:
    linear-gradient(rgba(200,169,110,0.8) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200,169,110,0.8) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-content {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 60px; align-items: center;
  padding: 80px 0 60px;
}

.hero-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 700; letter-spacing: 3px; text-transform: uppercase;
  color: var(--accent); margin-bottom: 20px;
}

.hero-tag::before {
  content: ''; display: block;
  width: 24px; height: 2px; background: var(--accent);
}

.hero-title {
  font-size: clamp(32px, 4vw, 56px);
  font-weight: 900; color: #fff; line-height: 1.15;
  letter-spacing: 1px; margin-bottom: 20px;
}

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

.hero-subtitle {
  font-size: 16px; color: rgba(240,244,255,0.72);
  max-width: 480px; margin-bottom: 36px; line-height: 1.8;
}

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }

.hero-stats {
  display: flex; gap: 36px;
  padding-top: 36px;
  border-top: 1px solid rgba(255,255,255,0.10);
}

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

.stat-num {
  font-size: 28px; font-weight: 900; color: var(--accent); line-height: 1;
  letter-spacing: -0.5px;
}

.stat-label {
  font-size: 12px; color: rgba(240,244,255,0.55);
  margin-top: 4px; letter-spacing: 0.5px;
}

.hero-visual {
  position: relative; display: flex; align-items: center; justify-content: center;
}

.hero-img-frame {
  width: 100%; max-width: 540px;
  border-radius: 16px; overflow: hidden;
  border: 1px solid rgba(200,169,110,0.20);
  box-shadow: 0 32px 80px rgba(0,0,0,0.5);
  position: relative;
}

.hero-img-frame img {
  width: 100%; height: auto;
  /* 【可修改】替换为公司产品主图，建议尺寸 960×640 */
}

.hero-img-badge {
  position: absolute; bottom: 20px; left: 20px;
  background: rgba(10,22,40,0.85);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(200,169,110,0.25);
  border-radius: 8px; padding: 10px 16px;
  color: #fff; font-size: 13px; font-weight: 600;
}

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

/* ===== 核心优势 ===== */
.features {
  padding: 80px 0;
  background: var(--bg-light);
}

.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
}

.feature-card {
  background: #fff; border-radius: var(--radius);
  padding: 36px 28px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: all var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(200,169,110,0.3);
}

.feature-icon img {
  width: 339px; height: 104px;
  object-fit: cover;
  border-radius: 0px;
  margin-bottom: 20px;
}

.feature-title {
  font-size: 17px; font-weight: 700; color: var(--primary); margin-bottom: 10px;
}

.feature-desc { font-size: 14px; color: #5A7090; line-height: 1.75; }

/* ===== 核心产品 ===== */
.products {
  padding: 96px 0;
}

.products-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
}

.product-card {
  background: #fff; border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: all var(--transition);
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.product-img-wrap {
  height: 220px; overflow: hidden;
  background: linear-gradient(135deg, #EEF2F8, #DDE4F0);
  position: relative;
  display: flex; align-items: center; justify-content: center;
}

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

.product-card:hover .product-img-wrap img { transform: scale(1.05); }

.product-img-placeholder {
  /* 【可修改】图片占位符，替换后删除此class */
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  color: #8A9BB8; font-size: 13px; gap: 8px;
}

.product-badge {
  position: absolute; top: 14px; left: 14px;
  background: var(--accent); color: var(--primary);
  font-size: 11px; font-weight: 700; padding: 3px 10px; border-radius: 30px;
  letter-spacing: 0.5px;
}

.product-body { padding: 24px; }

.product-category {
  font-size: 11px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase;
  color: var(--accent); margin-bottom: 8px;
}

.product-name {
  font-size: 18px; font-weight: 800; color: var(--primary); margin-bottom: 10px;
}

.product-desc { font-size: 13px; color: #5A7090; margin-bottom: 20px; line-height: 1.7; }

.product-specs {
  display: flex; gap: 16px; margin-bottom: 20px; flex-wrap: wrap;
}

.spec-item {
  font-size: 12px; color: #8A9BB8;
  background: var(--bg-light); padding: 4px 10px;
  border-radius: 30px; border: 1px solid var(--border);
}

.product-footer {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 16px; border-top: 1px solid var(--border);
}

.product-link {
  font-size: 13px; font-weight: 600; color: var(--accent);
  display: flex; align-items: center; gap: 4px; transition: gap var(--transition);
}

.product-link:hover { gap: 8px; }

/* ===== 行业解决方案 ===== */
.solutions {
  padding: 96px 0;
  background: var(--primary);
  position: relative; overflow: hidden;
}

.solutions::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 80% at 90% 50%, rgba(200,169,110,0.07) 0%, transparent 60%);
}

.solutions-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; position: relative; z-index: 1;
}

.solution-card {
  border: 1px solid rgba(200,169,110,0.15);
  border-radius: var(--radius); padding: 36px 28px;
  transition: all var(--transition);
  background: rgba(255,255,255,0.03);
}

.solution-card:hover {
  background: rgba(200,169,110,0.06);
  border-color: rgba(200,169,110,0.35);
  transform: translateY(-4px);
}

.solution-icon { font-size: 36px; margin-bottom: 18px; }

.solution-title {
  font-size: 18px; font-weight: 700; color: #fff; margin-bottom: 12px;
}

.solution-desc { font-size: 14px; color: rgba(240,244,255,0.60); line-height: 1.8; }

.solution-tags {
  display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px;
}

.solution-tag {
  font-size: 11px; padding: 3px 10px; border-radius: 30px;
  color: var(--accent); border: 1px solid rgba(200,169,110,0.25);
  background: rgba(200,169,110,0.07);
}

/* ===== 新闻 & 案例 ===== */
.news {
  padding: 96px 0;
  background: var(--bg-light);
}

.news-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
}

.news-card {
  background: #fff; border-radius: var(--radius);
  border: 1px solid var(--border); box-shadow: var(--shadow);
  overflow: hidden; transition: all var(--transition);
}

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

.news-img {
  height: 180px; background: linear-gradient(135deg, #EEF2F8, #DDE4F0);
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  color: #8A9BB8; font-size: 13px;
}

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

.news-body { padding: 20px; }

.news-date { font-size: 12px; color: #8A9BB8; margin-bottom: 8px; }

.news-title { font-size: 15px; font-weight: 700; color: var(--primary); margin-bottom: 8px; line-height: 1.5; }

.news-excerpt { font-size: 13px; color: #5A7090; line-height: 1.7; }

/* ===== 联系 CTA Banner ===== */
.cta-banner {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--primary) 0%, #1B3060 100%);
  text-align: center; position: relative; overflow: hidden;
}

.cta-banner::after {
  content: 'CHENXIANG AEROS';
  position: absolute; bottom: -20px; left: 50%; transform: translateX(-50%);
  font-size: 100px; font-weight: 900; color: rgba(255,255,255,0.03);
  white-space: nowrap; pointer-events: none; letter-spacing: 8px;
}

.cta-banner h2 {
  font-size: clamp(22px, 3vw, 36px);
  font-weight: 800; color: #fff; margin-bottom: 14px;
}

.cta-banner p { font-size: 16px; color: rgba(240,244,255,0.65); margin-bottom: 36px; }

/* ===== 页脚 ===== */
.footer {
  background: #060E1C;
  padding: 64px 0 0;
  color: rgba(240,244,255,0.65);
}

.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .nav-logo { margin-bottom: 16px; }

.footer-brand p { font-size: 13px; line-height: 1.85; max-width: 280px; }

.footer-col h4 {
  font-size: 14px; font-weight: 700; color: #fff;
  letter-spacing: 1.5px; text-transform: uppercase;
  margin-bottom: 18px; padding-bottom: 10px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-col ul { list-style: none; }

.footer-col ul li { margin-bottom: 10px; }

.footer-col ul li a {
  font-size: 13px; color: rgba(240,244,255,0.55);
  transition: color var(--transition);
}

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

.footer-contact li {
  display: flex; gap: 10px; align-items: flex-start; margin-bottom: 12px;
  font-size: 13px;
}

.footer-contact .icon { color: var(--accent); flex-shrink: 0; font-size: 14px; margin-top: 2px; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 20px 0;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px;
}

.footer-bottom p { font-size: 12px; color: rgba(240,244,255,0.35); }

/* 【可修改】备案号 - 后续替换真实备案号 */
.icp-num { color: rgba(240,244,255,0.45); font-size: 12px; }

/* ===== 产品列表页 ===== */
.page-hero {
  background: linear-gradient(135deg, var(--primary), #1B3060);
  padding: 120px 0 64px;
  text-align: center; position: relative; overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 50% 80% at 50% 100%, rgba(200,169,110,0.08) 0%, transparent 60%);
}

.page-hero-inner { position: relative; z-index: 1; }

.page-hero h1 {
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 900; color: #fff; margin-bottom: 12px;
}

.page-hero p { font-size: 16px; color: rgba(240,244,255,0.65); }

.breadcrumb {
  display: flex; align-items: center; justify-content: center;
  gap: 8px; margin-top: 16px; font-size: 13px; color: rgba(240,244,255,0.45);
}

.breadcrumb a { color: var(--accent); }

/* 产品分类 tab */
.product-tabs {
  padding: 24px 0 0; background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky; top: 68px; z-index: 100;
}

.product-group {
  scroll-margin-top: 140px;
}

.tab-list {
  display: flex; gap: 0; overflow-x: auto;
}

.tab-btn {
  padding: 16px 28px; font-size: 14px; font-weight: 600;
  cursor: pointer; white-space: nowrap; border: none; background: none;
  color: #5A7090; border-bottom: 3px solid transparent;
  transition: all var(--transition);
}

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

.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }

.products-section { padding: 32px 0; }

.product-section-title {
  font-size: 22px; font-weight: 800; color: var(--primary);
  margin-bottom: 32px; padding-bottom: 12px;
  border-bottom: 2px solid var(--border);
  display: flex; align-items: center; gap: 12px;
}

.product-section-title::before {
  content: ''; display: block;
  width: 5px; height: 22px;
  background: var(--accent); border-radius: 3px;
}

/* ===== 产品详情页 ===== */
.product-detail { padding: 80px 0; }

.product-detail-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start;
}

.product-gallery { position: sticky; top: 88px; }

.gallery-main {
  border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border);
  height: 380px; background: var(--bg-light);
  display: flex; align-items: center; justify-content: center;
}

.gallery-main img { width: 100%; height: 100%; object-fit: contain; padding: 20px; }

.gallery-thumbs {
  display: flex; gap: 10px; margin-top: 12px;
}

.gallery-thumb {
  width: 72px; height: 72px; border-radius: 6px; overflow: hidden;
  border: 2px solid transparent; cursor: pointer;
  background: var(--bg-light);
  display: flex; align-items: center; justify-content: center;
  transition: border-color var(--transition);
}

.gallery-thumb.active { border-color: var(--accent); }

.gallery-thumb img { width: 100%; height: 100%; object-fit: contain; }

.product-info-name {
  font-size: 30px; font-weight: 900; color: var(--primary); margin-bottom: 8px;
}

.product-info-sub { font-size: 14px; color: #8A9BB8; margin-bottom: 20px; letter-spacing: 1px; }

.product-info-desc { font-size: 15px; color: #3A5070; line-height: 1.9; margin-bottom: 28px; }

.product-params {
  background: var(--bg-light); border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border); margin-bottom: 32px;
}

.param-header {
  padding: 12px 20px; background: var(--primary);
  font-size: 13px; font-weight: 700; color: #fff; letter-spacing: 1px;
}

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

.param-table thead th {
  padding: 12px 20px; font-size: 13px; font-weight: 700;
  color: var(--primary); text-align: left;
  background: rgba(200,169,110,0.08);
  border-bottom: 2px solid var(--accent);
}

.param-table tr:nth-child(even) td { background: rgba(200,169,110,0.04); }

.param-table td {
  padding: 10px 20px; font-size: 13px;
  border-bottom: 1px solid var(--border);
}

.param-table td:first-child { 
  color: #5A7090; width: 30%; font-weight: 500; 
}

.param-table td:nth-child(2),
.param-table td:nth-child(3) { 
  color: var(--primary); font-weight: 600; 
  width: 35%; text-align: center;
}

.param-table th:nth-child(2),
.param-table th:nth-child(3) { 
  text-align: center;
}

/* ===== 联系表单 ===== */
.contact-form-section {
  background: linear-gradient(135deg, rgba(200,169,110,0.06), rgba(200,169,110,0.02));
  border: 1px solid rgba(200,169,110,0.20);
  border-radius: 14px; padding: 36px; margin-top: 20px;
}

.form-title {
  font-size: 18px; font-weight: 800; color: var(--primary); margin-bottom: 6px;
}

.form-subtitle { font-size: 13px; color: #8A9BB8; margin-bottom: 24px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.form-group { margin-bottom: 16px; }

.form-group label {
  display: block; font-size: 13px; font-weight: 600;
  color: #3A5070; margin-bottom: 6px;
}

.form-control {
  width: 100%; padding: 11px 14px;
  font-size: 14px; color: var(--primary);
  background: #fff; border: 1.5px solid var(--border);
  border-radius: 7px; outline: none;
  font-family: inherit; transition: border-color var(--transition);
}

.form-control:focus { border-color: var(--accent); }

textarea.form-control { resize: vertical; min-height: 90px; }

.form-submit { width: 100%; margin-top: 4px; justify-content: center; font-size: 15px; padding: 13px; }

.form-msg {
  margin-top: 12px; padding: 12px 16px; border-radius: 7px;
  font-size: 13px; display: none;
}

.form-msg.success { background: #EBF9F1; color: #1B7B45; border: 1px solid #A8E6C2; display: block; }

.form-msg.error { background: #FEF0EE; color: #C0392B; border: 1px solid #F5B5AD; display: block; }

/* ===== 关于我们页 ===== */
.about-intro { padding: 96px 0; }

.about-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center;
}

.about-img-frame {
  border-radius: 16px; overflow: hidden;
  box-shadow: var(--shadow-hover);
  border: 1px solid var(--border);
}

.about-img-frame img { width: 100%; height: auto; }

.about-list { list-style: none; margin-top: 24px; }

.about-list li {
  display: flex; gap: 12px; align-items: flex-start;
  margin-bottom: 14px; font-size: 14px; color: #3A5070; line-height: 1.7;
}

.about-list li::before {
  content: '✦'; color: var(--accent); flex-shrink: 0; margin-top: 2px; font-size: 12px;
}

.certs-section { padding: 40px 0; background: var(--bg-light); }

.certs-grid {
  display: grid; grid-template-columns: repeat(3, minmax(220px, 1fr)); gap: 24px;
  justify-items: center; align-items: start;
}

.cert-card {
  background: #fff; border-radius: var(--radius);
  border: 1px solid var(--border); box-shadow: var(--shadow);
  padding: 16px; text-align: center;
  max-width: 240px;
  width: 100%;
  transition: all var(--transition);
}

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

.cert-img {
  height: auto; background: transparent;
  border-radius: 8px; overflow: visible; margin-bottom: 12px;
}

.cert-img img {
  width: auto; max-width: 100%; height: auto;
  object-fit: contain; display: block; margin: 0 auto;
}

.cert-name { font-size: 13px; font-weight: 700; color: var(--primary); }

.team-section { padding: 80px 0; }

.contact-about { padding: 40px 0; background: var(--bg-light); }

.contact-about-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px;
}

.contact-info-block { background: #fff; border-radius: var(--radius); padding: 36px; border: 1px solid var(--border); }

.contact-info-block h3 { font-size: 20px; font-weight: 800; color: var(--primary); margin-bottom: 24px; }

.contact-item {
  display: flex; gap: 14px; align-items: flex-start;
  margin-bottom: 20px; padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.contact-item:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }

.contact-item-icon {
  width: 40px; height: 40px; flex-shrink: 0;
  background: linear-gradient(135deg, rgba(200,169,110,0.15), rgba(200,169,110,0.05));
  border: 1px solid rgba(200,169,110,0.25);
  border-radius: 10px; display: flex; align-items: center; justify-content: center;
  font-size: 18px;
}

.contact-item-label { font-size: 12px; color: #8A9BB8; margin-bottom: 3px; }

.contact-item-value { font-size: 14px; font-weight: 600; color: var(--primary); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-content { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { display: none; }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .solutions-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .certs-grid { grid-template-columns: repeat(2, 1fr); }
  .product-detail-grid { grid-template-columns: 1fr; }
  .product-gallery { position: static; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .hero-content { padding: 60px 0 40px; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .features-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr; }
  .solutions-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .about-grid { grid-template-columns: 1fr; }
  .contact-about-grid { grid-template-columns: 1fr; }
  .certs-grid { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
}

/* ===== 新商品详情页样式 ===== */
.product-detail-new { padding: 80px 0; }

.product-detail-new-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start;
  margin-bottom: 60px;
}

/* 产品图片介绍区域 */
.product-images-section {
  margin: 60px 0;
}

.product-images-header {
  text-align: center; margin-bottom: 40px;
}

.product-images-header .section-tag {
  display: inline-block; margin-bottom: 12px;
}

.product-images-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.product-image-card {
  background: var(--bg-card); border-radius: var(--radius);
  border: 1px solid var(--border); overflow: hidden;
  box-shadow: var(--shadow); transition: transform var(--transition);
}

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

.product-image-card img {
  width: 100%; height: 220px; object-fit: cover;
}

.product-image-caption {
  padding: 16px; text-align: center;
}

.product-image-caption h4 {
  font-size: 15px; font-weight: 700; color: var(--primary);
  margin-bottom: 6px;
}

.product-image-caption p {
  font-size: 13px; color: #5A7090; line-height: 1.6;
}

/* 通栏产品参数 */
.full-width-params {
  margin: 60px 0;
}

.full-width-params .product-params {
  margin-bottom: 0;
}

/* 单张通栏产品图片展示 */
.product-full-image-section {
  margin: 60px 0;
}

.product-full-image-header {
  text-align: center; margin-bottom: 40px;
}

.product-full-image-header .section-tag {
  display: inline-block; margin-bottom: 12px;
}

.product-full-image-container {
  width: 100%;
}

.product-full-image-wrapper {
  background: var(--bg-card); border-radius: var(--radius);
  border: 1px solid var(--border); overflow: hidden;
  box-shadow: var(--shadow);
}

.product-full-image-wrapper img {
  width: 100%; height: auto; max-height: 500px;
  object-fit: contain; display: block;
}

.product-full-image-caption {
  padding: 24px; text-align: center;
  background: var(--bg-light); border-top: 1px solid var(--border);
}

.product-full-image-caption h4 {
  font-size: 18px; font-weight: 700; color: var(--primary);
  margin-bottom: 8px;
}

.product-full-image-caption p {
  font-size: 14px; color: #5A7090; line-height: 1.6;
  max-width: 600px; margin: 0 auto;
}

/* 新详情页响应式调整 */
@media (max-width: 768px) {
  .product-detail-new-grid { grid-template-columns: 1fr; gap: 40px; }
  .product-images-grid { grid-template-columns: 1fr; }
  .product-full-image-wrapper img { max-height: 300px; }
  .product-full-image-caption { padding: 16px; }
}