/* ============================================================
   style.css – 熊猫体育「中国」官方网站 PANDA SPORTS
   风格：深色渐变 + 毛玻璃 + 圆角卡片 + 响应式 + 暗色模式
   生成日期：2025-03-20
   ============================================================ */

/* ---------- CSS 变量 / 主题色 ---------- */
:root {
  --bg-primary: #0d0d1a;
  --bg-secondary: #1a1a2e;
  --bg-card: rgba(26, 26, 46, 0.7);
  --bg-glass: rgba(255, 255, 255, 0.06);
  --text-primary: #f0f0f5;
  --text-secondary: #b0b0c0;
  --accent-orange: #ff6b35;
  --accent-purple: #533483;
  --accent-blue: #0f3460;
  --accent-pink: #e94560;
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5);
  --radius-card: 16px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: background 0.4s, color 0.4s;
}

a {
  color: var(--accent-orange);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: #ff8a5c;
}

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

ul, ol {
  list-style: none;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 滚动条 ---------- */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--accent-orange);
  border-radius: 4px;
}
body {
  scrollbar-width: thin;
  scrollbar-color: var(--accent-orange) var(--bg-primary);
}

/* ---------- 头部导航 ---------- */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13, 13, 26, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 107, 53, 0.2);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.logo a {
  display: flex;
  align-items: center;
}

.nav-menu {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.nav-menu li a {
  padding: 8px 16px;
  border-radius: 24px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: background var(--transition), color var(--transition);
}
.nav-menu li a:hover,
.nav-menu li a.active {
  background: var(--accent-orange);
  color: #fff;
}

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

.nav-actions button {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.08);
  transition: background var(--transition);
}
.nav-actions button:hover {
  background: rgba(255,107,53,0.3);
}

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 24px 16px;
  max-width: 600px;
  margin: 0 auto;
}
.search-box input {
  flex: 1;
  padding: 10px 16px;
  border-radius: 24px;
  border: 1px solid rgba(255,255,255,0.15);
  background: rgba(255,255,255,0.06);
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  transition: border var(--transition);
}
.search-box input:focus {
  border-color: var(--accent-orange);
}
.search-submit {
  padding: 10px 20px;
  border-radius: 24px;
  background: var(--accent-orange);
  color: #fff;
  font-weight: 600;
  transition: background var(--transition);
}
.search-submit:hover {
  background: #e55a2b;
}

/* 面包屑 */
.breadcrumb {
  padding: 8px 24px;
  background: rgba(255,255,255,0.03);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.breadcrumb ol {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  max-width: 1200px;
  margin: 0 auto;
}
.breadcrumb li {
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.breadcrumb li + li::before {
  content: "›";
  margin-right: 8px;
  color: var(--accent-orange);
}
.breadcrumb a {
  color: var(--text-secondary);
}
.breadcrumb a:hover {
  color: var(--accent-orange);
}

/* ---------- 移动菜单 ---------- */
.mobile-menu-toggle {
  display: none;
}

/* ---------- Hero Banner ---------- */
.hero-banner {
  position: relative;
  overflow: hidden;
  min-height: 70vh;
  display: flex;
  align-items: center;
}

.hero-slider {
  position: relative;
  width: 100%;
  height: 100%;
}

.slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.8s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 24px;
}
.slide.active {
  opacity: 1;
  position: relative;
}

.slide-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.slide-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  animation: fadeUp 0.8s ease forwards;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.slide-content h1,
.slide-content h2 {
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-orange), var(--accent-pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
}

.slide-content p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.8;
}

.btn-primary {
  display: inline-block;
  padding: 14px 40px;
  border-radius: 50px;
  background: linear-gradient(135deg, var(--accent-orange), #e55a2b);
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 20px rgba(255, 107, 53, 0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255, 107, 53, 0.5);
  color: #fff;
}

/* 轮播控制 */
.slider-controls {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  align-items: center;
  z-index: 10;
}
.slider-controls button {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: 1.5rem;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}
.slider-controls button:hover {
  background: var(--accent-orange);
}

/* ---------- 通用 Section ---------- */
.section {
  padding: 80px 0;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.section.visible {
  opacity: 1;
  transform: translateY(0);
}

.section h2 {
  text-align: center;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  margin-bottom: 48px;
  position: relative;
}
.section h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-orange), var(--accent-pink));
  margin: 12px auto 0;
  border-radius: 2px;
}

/* ---------- 品牌介绍 ---------- */
.about-content {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  align-items: center;
}
.about-content article {
  flex: 1 1 55%;
  min-width: 280px;
}
.about-content article p {
  color: var(--text-secondary);
  line-height: 1.9;
  font-size: 1rem;
}
.about-image {
  flex: 1 1 35%;
  min-width: 250px;
  display: flex;
  justify-content: center;
}

/* ---------- 企业文化 ---------- */
.culture-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.culture-card {
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-card);
  padding: 36px 24px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}
.culture-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card);
}
.culture-card svg {
  margin: 0 auto 16px;
}
.culture-card h3 {
  font-size: 1.3rem;
  margin-bottom: 12px;
  color: var(--accent-orange);
}
.culture-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ---------- 团队介绍 ---------- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 30px;
}
.team-card {
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-card);
  padding: 32px 20px;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.06);
  transition: transform var(--transition);
}
.team-card:hover {
  transform: scale(1.03);
}
.team-card svg {
  margin: 0 auto 16px;
}
.team-card h3 {
  font-size: 1.2rem;
  color: var(--accent-orange);
  margin-bottom: 8px;
}
.team-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ---------- 产品中心 ---------- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
}
.product-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.08);
  transition: transform var(--transition), box-shadow var(--transition);
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card);
}
.product-card svg {
  width: 100%;
  height: auto;
  display: block;
}
.product-card h3 {
  padding: 20px 20px 8px;
  font-size: 1.2rem;
  color: var(--accent-orange);
}
.product-card p {
  padding: 0 20px 16px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}
.read-more {
  display: inline-block;
  margin: 0 20px 20px;
  padding: 8px 20px;
  border-radius: 24px;
  background: rgba(255,107,53,0.15);
  color: var(--accent-orange);
  font-weight: 600;
  font-size: 0.85rem;
  transition: background var(--transition), color var(--transition);
}
.read-more:hover {
  background: var(--accent-orange);
  color: #fff;
}

/* ---------- 产品优势 ---------- */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
}
.advantage-item {
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-card);
  padding: 28px 20px;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.05);
  transition: transform var(--transition);
}
.advantage-item:hover {
  transform: translateY(-4px);
}
.advantage-item svg {
  margin: 0 auto 12px;
}
.advantage-item h3 {
  font-size: 1.1rem;
  color: var(--accent-orange);
  margin-bottom: 8px;
}
.advantage-item p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ---------- 服务介绍 ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 30px;
}
.service-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-card);
  padding: 36px 24px;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.06);
  transition: transform var(--transition);
}
.service-card:hover {
  transform: translateY(-5px);
}
.service-card svg {
  margin: 0 auto 16px;
}
.service-card h3 {
  font-size: 1.2rem;
  color: var(--accent-orange);
  margin-bottom: 12px;
}
.service-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ---------- 核心优势 (数字) ---------- */
.core-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 24px;
  text-align: center;
}
.core-item {
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-card);
  padding: 32px 16px;
  border: 1px solid rgba(255,255,255,0.05);
}
.number {
  font-size: 2.8rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-orange), var(--accent-pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}
.core-item p {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* ---------- 解决方案 ---------- */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}
.solution-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-card);
  padding: 32px 24px;
  border: 1px solid rgba(255,255,255,0.06);
  transition: transform var(--transition);
}
.solution-card:hover {
  transform: translateY(-4px);
}
.solution-card h3 {
  font-size: 1.2rem;
  color: var(--accent-orange);
  margin-bottom: 12px;
}
.solution-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ---------- 应用行业 ---------- */
.industries-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}
.industries-grid span {
  padding: 10px 28px;
  border-radius: 50px;
  background: var(--bg-glass);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255,107,53,0.3);
  color: var(--accent-orange);
  font-weight: 500;
  font-size: 0.95rem;
  transition: background var(--transition), color var(--transition);
}
.industries-grid span:hover {
  background: var(--accent-orange);
  color: #fff;
}

/* ---------- 成功案例 ---------- */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}
.case-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
  transition: transform var(--transition);
}
.case-card:hover {
  transform: translateY(-5px);
}
.case-card svg {
  width: 100%;
  height: auto;
}
.case-card h3 {
  padding: 20px 20px 8px;
  font-size: 1.1rem;
  color: var(--accent-orange);
}
.case-card p {
  padding: 0 20px 20px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ---------- 客户评价 ---------- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}
.testimonials-grid blockquote {
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  border-left: 4px solid var(--accent-orange);
  border: 1px solid rgba(255,255,255,0.05);
}
.testimonials-grid blockquote p {
  font-style: italic;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.7;
}
.testimonials-grid blockquote footer {
  color: var(--accent-orange);
  font-weight: 600;
  font-size: 0.9rem;
}

/* ---------- 新闻资讯 ---------- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}
.news-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
  transition: transform var(--transition);
}
.news-card:hover {
  transform: translateY(-5px);
}
.news-card svg {
  width: 100%;
  height: auto;
}
.news-card h3 {
  padding: 16px 20px 4px;
  font-size: 1.05rem;
  color: var(--accent-orange);
}
.date {
  padding: 0 20px;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
  margin-bottom: 8px;
}
.news-card p {
  padding: 0 20px 12px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}
.news-card .read-more {
  margin: 0 20px 20px;
}

/* ---------- 最新文章 / 热门推荐 / 相关推荐 ---------- */
.articles-grid,
.recommendations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}
.articles-grid article,
.rec-card {
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-card);
  padding: 24px;
  border: 1px solid rgba(255,255,255,0.05);
  transition: transform var(--transition);
}
.articles-grid article:hover,
.rec-card:hover {
  transform: translateY(-4px);
}
.articles-grid article h3,
.rec-card h3 {
  font-size: 1.1rem;
  color: var(--accent-orange);
  margin-bottom: 8px;
}
.articles-grid article p,
.rec-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 12px;
}
.articles-grid article a {
  font-weight: 600;
  font-size: 0.9rem;
}

.related-recommendations ul {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}
.related-recommendations ul li a {
  padding: 8px 20px;
  border-radius: 24px;
  background: var(--bg-glass);
  border: 1px solid rgba(255,107,53,0.2);
  font-size: 0.9rem;
  transition: background var(--transition);
}
.related-recommendations ul li a:hover {
  background: var(--accent-orange);
  color: #fff;
}

/* ---------- FAQ ---------- */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background: var(--bg-glass);
  backdrop-filter: blur(6px);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  border: 1px solid rgba(255,255,255,0.05);
  overflow: hidden;
}
.faq-question {
  width: 100%;
  text-align: left;
  padding: 18px 24px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  background: transparent;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background var(--transition);
}
.faq-question:hover {
  background: rgba(255,107,53,0.1);
}
.faq-question .icon {
  font-size: 1.4rem;
  color: var(--accent-orange);
  transition: transform var(--transition);
}
.faq-answer {
  padding: 0 24px 18px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ---------- HowTo ---------- */
.howto-content {
  max-width: 800px;
  margin: 0 auto;
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-card);
  padding: 32px 28px;
  border: 1px solid rgba(255,255,255,0.05);
}
.howto-content h3 {
  color: var(--accent-orange);
  margin-top: 20px;
  margin-bottom: 8px;
  font-size: 1.1rem;
}
.howto-content h3:first-child {
  margin-top: 0;
}
.howto-content p {
  color: var(--text-secondary);
  line-height: 1.7;
}
.howto-content ol {
  padding-left: 24px;
  color: var(--text-secondary);
  line-height: 2;
}
.howto-content ol li {
  list-style: decimal;
}

/* ---------- 联系我们 ---------- */
.contact-info {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-card);
  padding: 36px 28px;
  border: 1px solid rgba(255,255,255,0.05);
}
.contact-info p {
  margin-bottom: 12px;
  color: var(--text-secondary);
  font-size: 1rem;
}
.contact-info strong {
  color: var(--accent-orange);
  font-size: 1.2rem;
}
.contact-qr {
  display: flex;
  gap: 24px;
  justify-content: center;
  margin-top: 24px;
  flex-wrap: wrap;
}

/* ---------- 法律声明 / 友情链接 / 网站地图 ---------- */
.legal-section,
.friend-links,
.sitemap {
  background: var(--bg-glass);
  backdrop-filter: blur(6px);
  border-radius: var(--radius-card);
  padding: 40px 28px;
  margin-top: 24px;
  border: 1px solid rgba(255,255,255,0.04);
}
.legal-section h2,
.friend-links h2,
.sitemap h2 {
  margin-bottom: 24px;
}
.legal-section p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.8;
  margin-bottom: 8px;
}
.friend-links ul,
.sitemap ul {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}
.friend-links ul li a,
.sitemap ul li a {
  padding: 6px 16px;
  border-radius: 20px;
  background: rgba(255,107,53,0.1);
  font-size: 0.9rem;
  transition: background var(--transition);
}
.friend-links ul li a:hover,
.sitemap ul li a:hover {
  background: var(--accent-orange);
  color: #fff;
}

/* ---------- Footer ---------- */
footer {
  background: rgba(13, 13, 26, 0.9);
  backdrop-filter: blur(8px);
  border-top: 1px solid rgba(255,107,53,0.15);
  padding: 40px 24px;
  text-align: center;
}
footer p {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 8px;
}
footer a {
  color: var(--accent-orange);
}
#back-to-top {
  margin-top: 20px;
  padding: 10px 24px;
  border-radius: 40px;
  background: var(--accent-orange);
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
  transition: background var(--transition), transform var(--transition);
}
#back-to-top:hover {
  background: #e55a2b;
  transform: translateY(-2px);
}

/* ---------- 暗黑模式 (默认已是深色, 此处作为备用切换) ---------- */
body.dark-mode {
  --bg-primary: #0a0a12;
  --bg-secondary: #12121e;
  --text-primary: #e8e8f0;
  --text-secondary: #9a9aaa;
}
body.dark-mode .nav-container,
body.dark-mode footer {
  background: rgba(10, 10, 18, 0.9);
}

/* ---------- 响应式 ---------- */
@media (max-width: 992px) {
  .about-content {
    flex-direction: column;
  }
  .about-image {
    order: -1;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    flex-direction: column;
    width: 100%;
    background: rgba(13, 13, 26, 0.95);
    backdrop-filter: blur(12px);
    position: absolute;
    top: 100%;
    left: 0;
    padding: 16px 24px;
    gap: 4px;
    border-bottom: 1px solid rgba(255,107,53,0.2);
  }
  .nav-menu.active {
    display: flex;
  }
  .mobile-menu-toggle {
    display: flex;
  }

  .hero-banner {
    min-height: 60vh;
  }
  .slide-content h1,
  .slide-content h2 {
    font-size: 1.8rem;
  }

  .section {
    padding: 60px 0;
  }
  .section h2 {
    font-size: 1.6rem;
    margin-bottom: 32px;
  }

  .culture-grid,
  .team-grid,
  .products-grid,
  .advantages-grid,
  .services-grid,
  .core-grid,
  .solutions-grid,
  .cases-grid,
  .testimonials-grid,
  .news-grid,
  .articles-grid,
  .recommendations-grid {
    grid-template-columns: 1fr;
  }

  .contact-qr {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 480px) {
  .nav-container {
    padding: 8px 16px;
  }
  .slide-content p {
    font-size: 0.95rem;
  }
  .btn-primary {
    padding: 12px 28px;
    font-size: 0.9rem;
  }
  .breadcrumb {
    padding: 6px 16px;
  }
  .search-box {
    padding: 8px 16px 12px;
  }
  .faq-question {
    padding: 14px 16px;
    font-size: 0.9rem;
  }
  .howto-content {
    padding: 24px 16px;
  }
  .legal-section,
  .friend-links,
  .sitemap {
    padding: 28px 16px;
  }
}

/* ---------- 滚动动画 IntersectionObserver 触发 ---------- */
.section.visible {
  opacity: 1;
  transform: translateY(0);
}