/* ===== 全局重置与基础 ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: 'Segoe UI', 'PingFang SC', Roboto, 'Helvetica Neue', sans-serif; background: #0d0d1a; color: #e0e0e0; line-height: 1.6; overflow-x: hidden; transition: background 0.3s, color 0.3s; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
img, svg { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }
input, textarea { font: inherit; color: inherit; background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1); border-radius: 10px; padding: 12px 16px; width: 100%; outline: none; transition: border 0.3s, box-shadow 0.3s; }
input:focus, textarea:focus { border-color: #f0c040; box-shadow: 0 0 0 3px rgba(240,192,64,0.2); }
textarea { resize: vertical; min-height: 100px; }
::selection { background: #f0c040; color: #1a1a2e; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ===== 暗色模式变量 (默认) ===== */
:root { --bg-primary: #0d0d1a; --bg-secondary: #1a1a2e; --bg-card: rgba(26,26,46,0.7); --text-primary: #e0e0e0; --text-secondary: #b0b0b0; --accent-gold: #f0c040; --accent-red: #e94560; --accent-purple: #533483; --accent-blue: #0f3460; --glass-bg: rgba(26,26,46,0.5); --glass-border: rgba(255,255,255,0.08); --shadow: 0 8px 32px rgba(0,0,0,0.4); --radius: 16px; --radius-sm: 10px; }

/* ===== 滚动条 ===== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #1a1a2e; }
::-webkit-scrollbar-thumb { background: #f0c040; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #d4a830; }

/* ===== 标题通用 ===== */
h1 { font-size: clamp(1.6rem, 4vw, 2.8rem); font-weight: 800; line-height: 1.2; }
h2 { font-size: clamp(1.3rem, 3vw, 2rem); font-weight: 700; margin-bottom: 1.5rem; position: relative; display: inline-block; }
h2::after { content: ''; position: absolute; bottom: -6px; left: 0; width: 60px; height: 4px; background: linear-gradient(90deg, #f0c040, #e94560); border-radius: 2px; }
h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: 0.5rem; }
.section { padding: 60px 0; border-bottom: 1px solid rgba(255,255,255,0.04); }
.section:last-of-type { border-bottom: none; }

/* ===== 导航 ===== */
header { position: sticky; top: 0; z-index: 1000; background: rgba(13,13,26,0.85); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-bottom: 1px solid rgba(255,255,255,0.05); }
.nav-container { display: flex; align-items: center; justify-content: space-between; padding: 12px 20px; max-width: 1200px; margin: 0 auto; }
.logo a { display: flex; align-items: center; gap: 10px; font-size: 1.3rem; font-weight: 700; color: #f0c040; }
.logo svg { width: 40px; height: 40px; flex-shrink: 0; }
.nav-menu { display: flex; gap: 24px; }
.nav-menu a { font-size: 0.9rem; font-weight: 500; padding: 6px 0; position: relative; transition: color 0.3s; }
.nav-menu a::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: #f0c040; transition: width 0.3s; }
.nav-menu a:hover, .nav-menu a.active { color: #f0c040; }
.nav-menu a:hover::after, .nav-menu a.active::after { width: 100%; }
.nav-actions { display: flex; gap: 12px; align-items: center; }
.nav-actions button { padding: 8px; border-radius: 50%; background: rgba(255,255,255,0.05); transition: background 0.3s, transform 0.2s; display: flex; align-items: center; justify-content: center; }
.nav-actions button:hover { background: rgba(240,192,64,0.15); transform: scale(1.1); }
.menu-toggle { display: none; }
.search-bar { display: none; padding: 12px 20px; background: rgba(13,13,26,0.95); border-top: 1px solid rgba(255,255,255,0.05); max-width: 1200px; margin: 0 auto; }
.search-bar.active { display: flex; gap: 12px; }
.search-bar input { flex: 1; }
.search-bar button { padding: 10px 24px; background: #f0c040; color: #1a1a2e; border-radius: 10px; font-weight: 600; transition: background 0.3s; }
.search-bar button:hover { background: #d4a830; }

/* ===== 面包屑 ===== */
.breadcrumb { padding: 10px 20px; max-width: 1200px; margin: 0 auto; font-size: 0.8rem; color: #999; }
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 6px; }
.breadcrumb li { display: flex; align-items: center; }
.breadcrumb li + li::before { content: '›'; margin: 0 6px; color: #666; }
.breadcrumb a { color: #f0c040; transition: color 0.3s; }
.breadcrumb a:hover { color: #d4a830; }

/* ===== Hero Banner ===== */
.hero-banner { position: relative; overflow: hidden; min-height: 70vh; display: flex; align-items: center; }
.banner-slider { position: relative; width: 100%; }
.slide { display: none; align-items: center; justify-content: space-between; gap: 40px; padding: 40px 20px; max-width: 1200px; margin: 0 auto; animation: fadeSlide 0.6s ease; }
.slide.active { display: flex; }
@keyframes fadeSlide { from { opacity: 0; transform: translateX(30px); } to { opacity: 1; transform: translateX(0); } }
.banner-content { flex: 1; max-width: 600px; }
.banner-content h1 { margin-bottom: 1rem; background: linear-gradient(135deg, #f0c040, #e94560, #533483); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.banner-content p { font-size: 1.05rem; color: #b0b0b0; margin-bottom: 2rem; line-height: 1.7; }
.banner-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-primary, .btn-secondary { padding: 14px 32px; border-radius: 50px; font-weight: 600; transition: all 0.3s; display: inline-block; }
.btn-primary { background: linear-gradient(135deg, #f0c040, #e94560); color: #1a1a2e; box-shadow: 0 4px 20px rgba(240,192,64,0.3); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(240,192,64,0.4); }
.btn-secondary { background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.15); color: #e0e0e0; backdrop-filter: blur(6px); }
.btn-secondary:hover { background: rgba(255,255,255,0.12); transform: translateY(-3px); }
.banner-image { flex: 1; max-width: 500px; }
.banner-image svg { width: 100%; height: auto; border-radius: 20px; box-shadow: 0 20px 60px rgba(0,0,0,0.5); }
.banner-controls { position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%); display: flex; gap: 16px; align-items: center; }
.banner-controls button { width: 44px; height: 44px; border-radius: 50%; background: rgba(255,255,255,0.08); backdrop-filter: blur(10px); font-size: 1.5rem; display: flex; align-items: center; justify-content: center; transition: background 0.3s, transform 0.2s; color: #fff; }
.banner-controls button:hover { background: #f0c040; color: #1a1a2e; transform: scale(1.1); }
.dots { display: flex; gap: 8px; }
.dots span { width: 10px; height: 10px; border-radius: 50%; background: rgba(255,255,255,0.2); transition: background 0.3s, transform 0.2s; cursor: pointer; }
.dots span.active { background: #f0c040; transform: scale(1.3); }

/* ===== 品牌介绍 ===== */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.about-content p { margin-bottom: 1rem; color: #b0b0b0; }
.about-image svg { width: 100%; height: auto; border-radius: 16px; box-shadow: 0 12px 40px rgba(0,0,0,0.3); }

/* ===== 企业文化 ===== */
.culture-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 30px; }
.culture-item { background: var(--glass-bg); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border: 1px solid var(--glass-border); border-radius: var(--radius); padding: 30px 20px; text-align: center; transition: transform 0.3s, box-shadow 0.3s; }
.culture-item:hover { transform: translateY(-8px); box-shadow: 0 16px 40px rgba(0,0,0,0.3); }
.culture-item svg { margin: 0 auto 16px; }
.culture-item h3 { margin-bottom: 8px; }
.culture-item p { font-size: 0.9rem; color: #999; }

/* ===== 团队介绍 ===== */
.team-desc { text-align: center; max-width: 700px; margin: 0 auto 40px; color: #999; }
.team-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 30px; }
.team-member { background: var(--glass-bg); backdrop-filter: blur(12px); border: 1px solid var(--glass-border); border-radius: var(--radius); padding: 30px 20px; text-align: center; transition: transform 0.3s; }
.team-member:hover { transform: translateY(-6px); }
.team-member svg { margin: 0 auto 16px; }
.team-member h3 { margin-bottom: 4px; }
.team-member p { font-size: 0.85rem; color: #999; }
.team-member p:first-of-type { color: #f0c040; font-weight: 600; margin-bottom: 8px; }

/* ===== 企业介绍 ===== */
.company-content p { margin-bottom: 1rem; color: #b0b0b0; max-width: 800px; }

/* ===== 产品中心 ===== */
.products-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 30px; }
.product-card { background: var(--glass-bg); backdrop-filter: blur(12px); border: 1px solid var(--glass-border); border-radius: var(--radius); overflow: hidden; transition: transform 0.3s, box-shadow 0.3s; }
.product-card:hover { transform: translateY(-8px); box-shadow: 0 16px 48px rgba(0,0,0,0.3); }
.product-card svg { width: 100%; height: auto; }
.product-card h3, .product-card p { padding: 0 20px; }
.product-card h3 { margin-top: 16px; }
.product-card p { font-size: 0.9rem; color: #999; margin-bottom: 16px; }
.product-card .btn-small { display: inline-block; margin: 0 20px 20px; padding: 10px 24px; background: linear-gradient(135deg, #f0c040, #e94560); border-radius: 50px; font-weight: 600; color: #1a1a2e; transition: transform 0.3s, box-shadow 0.3s; }
.product-card .btn-small:hover { transform: scale(1.05); box-shadow: 0 4px 20px rgba(240,192,64,0.3); }

/* ===== 产品优势 ===== */
.advantages-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 30px; }
.advantage-item { background: var(--glass-bg); backdrop-filter: blur(12px); border: 1px solid var(--glass-border); border-radius: var(--radius); padding: 30px 20px; text-align: center; transition: transform 0.3s; }
.advantage-item:hover { transform: translateY(-6px); }
.advantage-item svg { margin: 0 auto 16px; }
.advantage-item h3 { margin-bottom: 8px; }
.advantage-item p { font-size: 0.9rem; color: #999; }

/* ===== 服务支持 ===== */
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.service-item { background: var(--glass-bg); backdrop-filter: blur(12px); border: 1px solid var(--glass-border); border-radius: var(--radius); padding: 24px; transition: transform 0.3s; }
.service-item:hover { transform: translateY(-4px); }
.service-item h3 { margin-bottom: 8px; color: #f0c040; }
.service-item p { font-size: 0.9rem; color: #999; }

/* ===== 核心优势 (数字动画) ===== */
.core-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 40px; text-align: center; }
.core-item { min-width: 120px; }
.core-number { font-size: 2.8rem; font-weight: 800; background: linear-gradient(135deg, #f0c040, #e94560); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; line-height: 1.2; }
.core-item p { font-size: 0.9rem; color: #999; margin-top: 4px; }

/* ===== 解决方案 ===== */
.solutions-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.solution-item { background: var(--glass-bg); backdrop-filter: blur(12px); border: 1px solid var(--glass-border); border-radius: var(--radius); padding: 28px; transition: transform 0.3s; }
.solution-item:hover { transform: translateY(-6px); }
.solution-item h3 { margin-bottom: 8px; color: #e94560; }
.solution-item p { font-size: 0.9rem; color: #999; }

/* ===== 应用行业 ===== */
.industries-grid { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }
.industry-item { padding: 12px 28px; background: var(--glass-bg); backdrop-filter: blur(8px); border: 1px solid var(--glass-border); border-radius: 50px; font-weight: 500; transition: all 0.3s; }
.industry-item:hover { background: #f0c040; color: #1a1a2e; transform: scale(1.05); }

/* ===== 成功案例 ===== */
.cases-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; }
.case-item { background: var(--glass-bg); backdrop-filter: blur(12px); border: 1px solid var(--glass-border); border-radius: var(--radius); overflow: hidden; transition: transform 0.3s; }
.case-item:hover { transform: translateY(-6px); }
.case-item svg { width: 100%; height: auto; }
.case-item h3, .case-item p { padding: 0 20px; }
.case-item h3 { margin-top: 16px; }
.case-item p { font-size: 0.9rem; color: #999; margin-bottom: 20px; }

/* ===== 客户评价 ===== */
.testimonials-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.testimonial-item { background: var(--glass-bg); backdrop-filter: blur(12px); border: 1px solid var(--glass-border); border-radius: var(--radius); padding: 28px; position: relative; }
.testimonial-item::before { content: '"'; font-size: 3rem; color: #f0c040; position: absolute; top: 8px; left: 16px; opacity: 0.3; }
.testimonial-item p { font-style: italic; color: #ccc; }
.testimonial-author { margin-top: 12px; font-style: normal !important; color: #f0c040 !important; font-weight: 600; }

/* ===== 新闻资讯 ===== */
.news-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.news-item { background: var(--glass-bg); backdrop-filter: blur(12px); border: 1px solid var(--glass-border); border-radius: var(--radius); overflow: hidden; transition: transform 0.3s; }
.news-item:hover { transform: translateY(-6px); }
.news-item svg { width: 100%; height: auto; }
.news-item h3, .news-item p { padding: 0 20px; }
.news-item h3 { margin-top: 16px; }
.news-date { font-size: 0.8rem; color: #888; margin: 4px 0 8px; }
.news-item p { font-size: 0.9rem; color: #999; margin-bottom: 12px; }
.read-more { display: inline-block; margin: 0 20px 20px; color: #f0c040; font-weight: 600; transition: color 0.3s; }
.read-more:hover { color: #d4a830; }

/* ===== 最新文章 ===== */
.articles-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.article-item { background: var(--glass-bg); backdrop-filter: blur(12px); border: 1px solid var(--glass-border); border-radius: var(--radius); padding: 24px; transition: transform 0.3s; }
.article-item:hover { transform: translateY(-4px); }
.article-item h3 { margin-bottom: 4px; }
.article-date { font-size: 0.8rem; color: #888; margin-bottom: 8px; }
.article-item p { font-size: 0.9rem; color: #999; margin-bottom: 12px; }

/* ===== 热门推荐 / 相关推荐 ===== */
.recommendations-grid, .related-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }
.recommendation-item, .related-item { background: var(--glass-bg); backdrop-filter: blur(8px); border: 1px solid var(--glass-border); border-radius: var(--radius-sm); padding: 20px; text-align: center; transition: all 0.3s; }
.recommendation-item:hover, .related-item:hover { background: rgba(240,192,64,0.1); transform: translateY(-3px); }
.related-item { display: block; font-weight: 500; }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { margin-bottom: 12px; border-radius: var(--radius-sm); overflow: hidden; background: var(--glass-bg); backdrop-filter: blur(8px); border: 1px solid var(--glass-border); }
.faq-question { width: 100%; text-align: left; padding: 18px 24px; font-weight: 600; font-size: 1rem; display: flex; justify-content: space-between; align-items: center; transition: background 0.3s; }
.faq-question::after { content: '+'; font-size: 1.4rem; transition: transform 0.3s; }
.faq-item.active .faq-question::after { transform: rotate(45deg); }
.faq-question:hover { background: rgba(255,255,255,0.03); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.4s ease; padding: 0 24px; }
.faq-item.active .faq-answer { max-height: 400px; padding: 0 24px 18px; }
.faq-answer p { color: #999; font-size: 0.9rem; }

/* ===== HowTo ===== */
.howto-content { max-width: 800px; }
.howto-content h3 { margin-top: 24px; margin-bottom: 8px; color: #f0c040; }
.howto-content ul, .howto-content ol { padding-left: 24px; margin-bottom: 12px; }
.howto-content li { margin-bottom: 6px; color: #b0b0b0; }
.howto-content p { color: #b0b0b0; }

/* ===== 联系我们 ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info p { margin-bottom: 8px; color: #b0b0b0; }
.contact-info strong { color: #f0c040; }
.contact-form form { display: flex; flex-direction: column; gap: 16px; }
.contact-form button { padding: 14px 32px; background: linear-gradient(135deg, #f0c040, #e94560); color: #1a1a2e; border-radius: 50px; font-weight: 600; transition: transform 0.3s, box-shadow 0.3s; }
.contact-form button:hover { transform: translateY(-3px); box-shadow: 0 6px 24px rgba(240,192,64,0.3); }

/* ===== 作者介绍 ===== */
.author-content { display: flex; align-items: center; gap: 24px; max-width: 700px; }
.author-content svg { flex-shrink: 0; }
.author-content p { color: #b0b0b0; }
.author-content strong { color: #f0c040; }

/* ===== 团队介绍 / 品牌历史 / 版权 / 免责 / 隐私 / 安全 ===== */
.team-intro p, .history p, .copyright-info p, .disclaimer p, .privacy p, .security p { max-width: 800px; color: #b0b0b0; }
.history-timeline { display: flex; flex-wrap: wrap; gap: 20px; }
.history-item { background: var(--glass-bg); backdrop-filter: blur(8px); border: 1px solid var(--glass-border); border-radius: var(--radius-sm); padding: 20px; flex: 1 1 180px; }
.history-item h3 { color: #f0c040; }
.history-item p { font-size: 0.85rem; }

/* ===== 友情链接 ===== */
.friends-grid { display: flex; flex-wrap: wrap; gap: 12px; }
.friends-grid a { padding: 8px 20px; background: var(--glass-bg); backdrop-filter: blur(6px); border: 1px solid var(--glass-border); border-radius: 50px; font-size: 0.85rem; transition: all 0.3s; }
.friends-grid a:hover { background: #f0c040; color: #1a1a2e; }

/* ===== 网站地图 ===== */
.sitemap-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 30px; }
.sitemap-grid h3 { color: #f0c040; margin-bottom: 12px; }
.sitemap-grid ul li { margin-bottom: 6px; }
.sitemap-grid a { color: #999; transition: color 0.3s; }
.sitemap-grid a:hover { color: #f0c040; }

/* ===== Footer ===== */
footer { background: #0a0a1a; border-top: 1px solid rgba(255,255,255,0.05); padding: 40px 20px 20px; }
.footer-content { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: auto 1fr auto; gap: 30px; align-items: start; }
.footer-logo { display: flex; align-items: center; gap: 10px; font-weight: 700; color: #f0c040; font-size: 1.1rem; }
.footer-info p { font-size: 0.8rem; color: #888; margin-bottom: 4px; }
.footer-qr { display: flex; gap: 16px; align-items: center; }
.footer-qr svg { width: 70px; height: 70px; border-radius: 8px; }
.footer-qr p { font-size: 0.7rem; color: #888; text-align: center; }
.back-to-top { position: fixed; bottom: 30px; right: 30px; width: 48px; height: 48px; border-radius: 50%; background: #f0c040; color: #1a1a2e; font-size: 1.5rem; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 20px rgba(240,192,64,0.3); transition: transform 0.3s, opacity 0.3s; opacity: 0; pointer-events: none; z-index: 999; }
.back-to-top.visible { opacity: 1; pointer-events: auto; }
.back-to-top:hover { transform: scale(1.1); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .about-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-content { grid-template-columns: 1fr; text-align: center; }
    .footer-qr { justify-content: center; }
}

@media (max-width: 768px) {
    .nav-menu { display: none; position: absolute; top: 100%; left: 0; right: 0; background: rgba(13,13,26,0.98); backdrop-filter: blur(20px); flex-direction: column; padding: 20px; gap: 12px; border-bottom: 1px solid rgba(255,255,255,0.05); }
    .nav-menu.open { display: flex; }
    .menu-toggle { display: flex; }
    .slide { flex-direction: column; text-align: center; padding: 20px; }
    .banner-content { max-width: 100%; }
    .banner-actions { justify-content: center; }
    .banner-image { max-width: 100%; }
    .core-grid { gap: 24px; }
    .core-number { font-size: 2rem; }
    .section { padding: 40px 0; }
}

@media (max-width: 480px) {
    .nav-container { padding: 10px 16px; }
    .logo span { font-size: 1rem; }
    .btn-primary, .btn-secondary { padding: 12px 24px; font-size: 0.9rem; }
    .culture-grid, .team-grid, .products-grid, .advantages-grid, .services-grid, .cases-grid, .news-grid, .articles-grid { grid-template-columns: 1fr; }
    .footer-qr { flex-direction: column; }
}

/* ===== 滚动动画 (Intersection Observer 用) ===== */
.fade-up { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ===== 暗色模式 (默认已暗, 保留切换) ===== */
body.light { --bg-primary: #f5f5f5; --bg-secondary: #ffffff; --bg-card: rgba(255,255,255,0.7); --text-primary: #1a1a2e; --text-secondary: #555; --glass-bg: rgba(255,255,255,0.5); --glass-border: rgba(0,0,0,0.08); --shadow: 0 8px 32px rgba(0,0,0,0.1); }
body.light { background: var(--bg-primary); color: var(--text-primary); }
body.light header { background: rgba(255,255,255,0.85); }
body.light .breadcrumb { color: #666; }
body.light .breadcrumb a { color: #1a1a2e; }
body.light .breadcrumb a:hover { color: #f0c040; }
body.light .faq-question:hover { background: rgba(0,0,0,0.02); }
body.light .footer-info p { color: #666; }