/* 基础样式重置与品牌设计 */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Segoe UI', 'PingFang SC', Roboto, sans-serif; line-height: 1.7; color: #333; background: #fff; transition: background 0.3s, color 0.3s; }
body.dark-mode { background: #121212; color: #e0e0e0; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
h1, h2, h3, h4 { font-weight: 700; line-height: 1.3; }
a { color: #ff6b35; text-decoration: none; transition: color 0.3s; }
a:hover { color: #e94560; }
img, svg { max-width: 100%; height: auto; display: block; }
.btn { display: inline-block; padding: 10px 24px; background: linear-gradient(135deg, #ff6b35, #e94560); color: #fff; border-radius: 30px; font-weight: 600; transition: transform 0.3s, box-shadow 0.3s; }
.btn:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(255,107,53,0.3); }
.section { padding: 80px 0; border-bottom: 1px solid rgba(0,0,0,0.05); }
body.dark-mode .section { border-color: rgba(255,255,255,0.05); }
.section h2 { font-size: 2rem; margin-bottom: 30px; text-align: center; position: relative; }
.section h2::after { content: ''; display: block; width: 60px; height: 4px; background: #ff6b35; margin: 10px auto; border-radius: 2px; }
/* 毛玻璃卡片 */
.glass-card { background: rgba(255,255,255,0.7); backdrop-filter: blur(20px); border-radius: 20px; padding: 30px; box-shadow: 0 8px 32px rgba(0,0,0,0.1); transition: transform 0.3s, box-shadow 0.3s; }
body.dark-mode .glass-card { background: rgba(30,30,30,0.7); box-shadow: 0 8px 32px rgba(0,0,0,0.5); }
.glass-card:hover { transform: translateY(-5px); box-shadow: 0 12px 40px rgba(0,0,0,0.15); }
/* 渐变Banner */
.hero-banner { position: relative; overflow: hidden; border-radius: 0 0 30px 30px; }
.banner-slide { display: none; }
.banner-slide.active { display: block; animation: fadeIn 0.8s ease; }
@keyframes fadeIn { from { opacity: 0; transform: scale(1.05); } to { opacity: 1; transform: scale(1); } }
.banner-controls { position: absolute; top: 50%; width: 100%; display: flex; justify-content: space-between; padding: 0 20px; transform: translateY(-50%); pointer-events: none; }
.banner-controls button { pointer-events: auto; background: rgba(255,255,255,0.3); border: none; color: #fff; font-size: 2rem; width: 50px; height: 50px; border-radius: 50%; cursor: pointer; backdrop-filter: blur(5px); transition: background 0.3s; }
.banner-controls button:hover { background: rgba(255,255,255,0.5); }
.banner-dots { position: absolute; bottom: 20px; width: 100%; display: flex; justify-content: center; gap: 10px; }
.banner-dots .dot { width: 12px; height: 12px; border-radius: 50%; background: rgba(255,255,255,0.4); border: none; cursor: pointer; transition: background 0.3s; }
.banner-dots .dot.active { background: #fff; }
/* 导航 */
header { background: rgba(255,255,255,0.95); backdrop-filter: blur(10px); position: sticky; top: 0; z-index: 1000; box-shadow: 0 2px 20px rgba(0,0,0,0.08); }
body.dark-mode header { background: rgba(18,18,18,0.95); }
.header-container { display: flex; align-items: center; justify-content: space-between; padding: 10px 20px; max-width: 1200px; margin: 0 auto; }
.nav-menu { display: flex; list-style: none; gap: 25px; }
.nav-menu a { font-weight: 500; padding: 5px 0; position: relative; color: #333; }
body.dark-mode .nav-menu a { color: #e0e0e0; }
.nav-menu a.active { color: #ff6b35; }
.nav-menu a::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: #ff6b35; transition: width 0.3s; }
.nav-menu a:hover::after { width: 100%; }
.nav-actions { display: flex; gap: 10px; align-items: center; }
.nav-actions button { background: none; border: none; font-size: 1.3rem; cursor: pointer; padding: 5px; border-radius: 50%; transition: background 0.3s; }
.nav-actions button:hover { background: rgba(0,0,0,0.05); }
body.dark-mode .nav-actions button:hover { background: rgba(255,255,255,0.1); }
.menu-toggle { display: none; }
/* 面包屑 */
.breadcrumb { padding: 15px 20px; background: #f9f9f9; font-size: 0.9rem; }
body.dark-mode .breadcrumb { background: #1e1e1e; }
.breadcrumb ol { list-style: none; display: flex; gap: 10px; }
.breadcrumb li+li::before { content: '›'; margin-right: 10px; color: #999; }
/* 卡片网格 */
.brand-content, .culture-grid, .team-grid, .product-grid, .service-grid, .case-grid, .news-grid, .eeat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; margin-top: 30px; }
.brand-content { grid-template-columns: 1fr 1fr; }
.brand-text p { font-size: 1.05rem; color: #555; }
body.dark-mode .brand-text p { color: #bbb; }
.brand-meta { margin-top: 20px; display: flex; gap: 30px; font-size: 0.9rem; color: #999; }
.culture-card, .team-card, .product-card, .service-card, .case-card, .news-card { background: #fff; border-radius: 20px; padding: 25px; box-shadow: 0 4px 20px rgba(0,0,0,0.06); transition: transform 0.3s, box-shadow 0.3s; text-align: center; }
body.dark-mode .culture-card, body.dark-mode .team-card, body.dark-mode .product-card, body.dark-mode .service-card, body.dark-mode .case-card, body.dark-mode .news-card { background: #1e1e1e; box-shadow: 0 4px 20px rgba(0,0,0,0.3); }
.culture-card:hover, .team-card:hover, .product-card:hover, .service-card:hover, .case-card:hover, .news-card:hover { transform: translateY(-8px); box-shadow: 0 12px 40px rgba(0,0,0,0.1); }
.product-card svg, .case-card svg, .news-card svg { margin-bottom: 15px; border-radius: 12px; }
.product-card h3, .case-card h3, .news-card h3 { margin: 10px 0; }
.product-card p, .case-card p, .news-card p { color: #666; font-size: 0.95rem; }
body.dark-mode .product-card p, body.dark-mode .case-card p, body.dark-mode .news-card p { color: #aaa; }
/* 核心优势数字 */
.core-grid { display: flex; justify-content: center; gap: 60px; flex-wrap: wrap; }
.core-item { text-align: center; }
.core-item .num { font-size: 3rem; font-weight: 800; color: #ff6b35; display: block; }
body.dark-mode .core-item .num { color: #ff8c5a; }
.core-item p { font-size: 1.1rem; color: #666; }
/* 优势列表 */
.advantages-list { display: grid; gap: 20px; }
.advantage-item { display: flex; align-items: center; gap: 20px; padding: 20px; background: #f9f9f9; border-radius: 16px; transition: background 0.3s; }
body.dark-mode .advantage-item { background: #2a2a2a; }
.advantage-item:hover { background: #f0f0f0; }
body.dark-mode .advantage-item:hover { background: #333; }
/* 评价 */
.testimonial-slider { display: flex; gap: 30px; overflow-x: auto; padding: 20px 0; scroll-snap-type: x mandatory; }
.testimonial-card { min-width: 300px; background: #fff; border-radius: 20px; padding: 30px; box-shadow: 0 4px 20px rgba(0,0,0,0.06); scroll-snap-align: start; }
body.dark-mode .testimonial-card { background: #1e1e1e; }
.testimonial-card p { font-style: italic; color: #555; }
body.dark-mode .testimonial-card p { color: #bbb; }
.testimonial-card cite { display: block; margin-top: 15px; font-weight: 600; color: #ff6b35; }
/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid #eee; }
body.dark-mode .faq-item { border-color: #333; }
.faq-question { width: 100%; padding: 18px; background: none; border: none; text-align: left; font-size: 1.05rem; font-weight: 600; cursor: pointer; position: relative; color: inherit; }
.faq-question::after { content: '+'; position: absolute; right: 20px; font-size: 1.5rem; transition: transform 0.3s; }
.faq-question.active::after { transform: rotate(45deg); }
.faq-answer { display: none; padding: 0 18px 18px; color: #666; }
body.dark-mode .faq-answer { color: #aaa; }
/* 联系 */
.contact-info { text-align: center; }
.contact-info p { margin: 10px 0; }
.qrcodes { display: flex; justify-content: center; gap: 40px; margin-top: 30px; }
.qrcode { text-align: center; }
.qrcode p { margin-top: 10px; font-weight: 500; }
/* 底部 */
footer { background: #1a1a2e; color: #ccc; padding: 40px 0; text-align: center; }
footer a { color: #ff6b35; }
footer a:hover { color: #e94560; }
.footer-links { margin-top: 20px; display: flex; justify-content: center; gap: 30px; }
/* 返回顶部 */
#backToTop { position: fixed; bottom: 30px; right: 30px; width: 50px; height: 50px; border-radius: 50%; background: #ff6b35; color: #fff; border: none; font-size: 1.5rem; cursor: pointer; box-shadow: 0 4px 15px rgba(255,107,53,0.3); transition: transform 0.3s; z-index: 999; }
#backToTop:hover { transform: scale(1.1); }
/* 响应式 */
@media (max-width: 768px) {
    .nav-menu { display: none; flex-direction: column; position: absolute; top: 60px; left: 0; width: 100%; background: rgba(255,255,255,0.98); padding: 20px; box-shadow: 0 4px 20px rgba(0,0,0,0.1); }
    body.dark-mode .nav-menu { background: rgba(18,18,18,0.98); }
    .nav-menu.active { display: flex; }
    .menu-toggle { display: block; }
    .brand-content { grid-template-columns: 1fr; }
    .core-grid { gap: 30px; }
    .core-item .num { font-size: 2rem; }
    .section { padding: 50px 0; }
    .banner-controls button { width: 40px; height: 40px; font-size: 1.5rem; }
}
@media (max-width: 480px) {
    .container { padding: 0 15px; }
    .section h2 { font-size: 1.5rem; }
    .product-grid, .service-grid, .case-grid, .news-grid { grid-template-columns: 1fr; }
}
/* 滚动动画 */
.section { opacity: 0; transform: translateY(30px); transition: opacity 0.8s ease, transform 0.8s ease; }
.section.animate { opacity: 1; transform: translateY(0); }
/* 标签 */
.industry-tags { display: flex; flex-wrap: wrap; gap: 15px; justify-content: center; }
.industry-tags span { padding: 8px 20px; background: #f0f0f0; border-radius: 30px; font-size: 0.95rem; }
body.dark-mode .industry-tags span { background: #2a2a2a; }
/* tab */
.article-tabs { display: flex; gap: 10px; justify-content: center; margin-bottom: 20px; }
.tab { padding: 8px 20px; border: none; background: #f0f0f0; border-radius: 30px; cursor: pointer; font-weight: 500; transition: background 0.3s; }
body.dark-mode .tab { background: #2a2a2a; color: #e0e0e0; }
.tab.active { background: #ff6b35; color: #fff; }
/* EEAT */
.eeat-grid { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.eeat-card { padding: 20px; background: #f9f9f9; border-radius: 16px; }
body.dark-mode .eeat-card { background: #2a2a2a; }
/* 搜索 */
.search-bar { display: none; padding: 10px 20px; background: #f5f5f5; text-align: center; }
body.dark-mode .search-bar { background: #1e1e1e; }
.search-bar input { padding: 8px 15px; width: 300px; max-width: 80%; border: 1px solid #ddd; border-radius: 30px; }
.search-bar button { padding: 8px 20px; background: #ff6b35; color: #fff; border: none; border-radius: 30px; cursor: pointer; }
/* 友情链接 */
.friend-links { display: flex; flex-wrap: wrap; gap: 20px; justify-content: center; }
.friend-links a { color: #666; }
body.dark-mode .friend-links a { color: #aaa; }
/* 网站地图 */
.sitemap ul { list-style: none; display: flex; flex-wrap: wrap; gap: 20px; justify-content: center; }
.sitemap ul li a { color: #555; }
body.dark-mode .sitemap ul li a { color: #bbb; }