```css
:root {
    --primary: #FF6B00;
    --primary-dark: #E05500;
    --primary-light: #FF8C3A;
    --bg: #FFFFFF;
    --bg-alt: #F8F9FA;
    --text: #1A1A2E;
    --text-light: #6C757D;
    --border: #E9ECEF;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --radius: 12px;
    --transition: all 0.3s ease;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif; color: var(--text); background: var(--bg); line-height: 1.6; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img, svg { max-width: 100%; height: auto; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
/* 导航吸顶 */
.header { position: sticky; top: 0; z-index: 1000; background: rgba(255,255,255,0.98); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 24px; font-weight: 700; color: var(--primary); }
.logo svg { width: 40px; height: 40px; }
.nav { display: flex; gap: 30px; align-items: center; }
.nav a { color: var(--text); font-size: 15px; font-weight: 500; position: relative; padding: 5px 0; }
.nav a::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px; background: var(--primary); transition: var(--transition); }
.nav a:hover::after { width: 100%; }
.nav a:hover { color: var(--primary); }
.mobile-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 5px; }
.mobile-toggle span { width: 28px; height: 3px; background: var(--text); border-radius: 2px; transition: var(--transition); }
.mobile-menu { display: none; position: fixed; top: 70px; left: 0; right: 0; bottom: 0; background: var(--bg); z-index: 999; padding: 30px 20px; overflow-y: auto; }
.mobile-menu.active { display: block; }
.mobile-menu a { display: block; padding: 15px 0; font-size: 18px; border-bottom: 1px solid var(--border); color: var(--text); }
.mobile-menu a:hover { color: var(--primary); }
/* Banner */
.banner { position: relative; overflow: hidden; background: linear-gradient(135deg, #FFF5EB 0%, #FFE8D6 100%); min-height: 500px; display: flex; align-items: center; }
.banner-slides { position: relative; width: 100%; }
.banner-slide { display: none; padding: 60px 0; }
.banner-slide.active { display: block; animation: fadeIn 0.8s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.banner-content { max-width: 600px; }
.banner-content h1 { font-size: 48px; font-weight: 800; line-height: 1.2; margin-bottom: 20px; color: var(--text); }
.banner-content h1 span { color: var(--primary); }
.banner-content p { font-size: 18px; color: var(--text-light); margin-bottom: 30px; line-height: 1.8; }
.banner-content .btn { display: inline-block; padding: 14px 36px; background: var(--primary); color: #fff; border-radius: 50px; font-size: 16px; font-weight: 600; transition: var(--transition); border: none; cursor: pointer; }
.banner-content .btn:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 25px rgba(255,107,0,0.3); }
.banner-image { position: absolute; right: 0; top: 50%; transform: translateY(-50%); width: 45%; }
.banner-dots { display: flex; gap: 10px; justify-content: center; margin-top: 30px; }
.banner-dots span { width: 12px; height: 12px; border-radius: 50%; background: var(--border); cursor: pointer; transition: var(--transition); }
.banner-dots span.active { background: var(--primary); width: 30px; border-radius: 6px; }
/* 面包屑 */
.breadcrumb { padding: 15px 0; font-size: 14px; color: var(--text-light); background: var(--bg-alt); }
.breadcrumb a { color: var(--text-light); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span { margin: 0 8px; }
/* 通用标题 */
.section-title { text-align: center; margin-bottom: 50px; }
.section-title h2 { font-size: 36px; font-weight: 700; margin-bottom: 15px; color: var(--text); }
.section-title h2 span { color: var(--primary); }
.section-title p { font-size: 16px; color: var(--text-light); max-width: 600px; margin: 0 auto; line-height: 1.8; }
/* 品牌介绍 */
.brand-intro { padding: 80px 0; background: var(--bg); }
.brand-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.brand-text h3 { font-size: 28px; margin-bottom: 20px; }
.brand-text p { color: var(--text-light); margin-bottom: 15px; font-size: 16px; line-height: 1.8; }
.brand-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 30px; }
.brand-stat { text-align: center; padding: 20px; background: var(--bg-alt); border-radius: var(--radius); }
.brand-stat .num { font-size: 36px; font-weight: 700; color: var(--primary); }
.brand-stat .label { font-size: 14px; color: var(--text-light); margin-top: 5px; }
/* 产品 */
.products { padding: 80px 0; background: var(--bg-alt); }
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.product-card { background: var(--bg); border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow); transition: var(--transition); }
.product-card:hover { transform: translateY(-5px); box-shadow: 0 10px 40px rgba(0,0,0,0.12); }
.product-card svg { width: 60px; height: 60px; margin-bottom: 20px; }
.product-card h3 { font-size: 20px; margin-bottom: 10px; }
.product-card p { font-size: 14px; color: var(--text-light); line-height: 1.7; }
/* 解决方案 */
.solutions { padding: 80px 0; background: var(--bg); }
.solution-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
.solution-card { display: flex; gap: 20px; padding: 25px; background: var(--bg-alt); border-radius: var(--radius); transition: var(--transition); }
.solution-card:hover { background: var(--primary); color: #fff; }
.solution-card:hover p { color: rgba(255,255,255,0.9); }
.solution-card svg { width: 50px; height: 50px; flex-shrink: 0; }
.solution-card h3 { font-size: 18px; margin-bottom: 8px; }
.solution-card p { font-size: 14px; color: var(--text-light); line-height: 1.6; }
/* 案例 */
.cases { padding: 80px 0; background: var(--bg-alt); }
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.case-card { background: var(--bg); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: var(--transition); }
.case-card:hover { transform: translateY(-5px); }
.case-card .case-img { height: 200px; background: linear-gradient(135deg, var(--primary-light), var(--primary)); display: flex; align-items: center; justify-content: center; }
.case-card .case-body { padding: 20px; }
.case-card .case-body h3 { font-size: 18px; margin-bottom: 8px; }
.case-card .case-body p { font-size: 14px; color: var(--text-light); line-height: 1.6; }
/* 文章列表 */
.articles { padding: 80px 0; background: var(--bg); }
.article-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
.article-card { display: flex; gap: 20px; padding: 25px; background: var(--bg-alt); border-radius: var(--radius); transition: var(--transition); }
.article-card:hover { box-shadow: var(--shadow); }
.article-card .article-icon { width: 80px; height: 80px; flex-shrink: 0; background: linear-gradient(135deg, var(--primary-light), var(--primary)); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; }
.article-card .article-info h3 { font-size: 18px; margin-bottom: 8px; }
.article-card .article-info .meta { font-size: 13px; color: var(--text-light); margin-bottom: 8px; }
.article-card .article-info p { font-size: 14px; color: var(--text-light); line-height: 1.6; }
.article-card .article-info .read-more { color: var(--primary); font-weight: 500; font-size: 14px; }
/* FAQ */
.faq { padding: 80px 0; background: var(--bg-alt); }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { background: var(--bg); border-radius: var(--radius); margin-bottom: 15px; overflow: hidden; box-shadow: var(--shadow); }
.faq-question { padding: 20px 25px; cursor: pointer; display: flex; justify-content: space-between; align-items: center; font-size: 17px; font-weight: 600; transition: var(--transition); }
.faq-question:hover { color: var(--primary); }
.faq-question .icon { font-size: 20px; transition: var(--transition); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.4s ease; padding: 0 25px; }
.faq-item.active .faq-answer { max-height: 500px; padding: 0 25px 20px; }
.faq-item.active .faq-question .icon { transform: rotate(45deg); }
.faq-answer p { font-size: 15px; color: var(--text-light); line-height: 1.8; }
/* HowTo */
.howto { padding: 80px 0; background: var(--bg); }
.howto-steps { max-width: 800px; margin: 0 auto; counter-reset: step; }
.howto-step { display: flex; gap: 20px; margin-bottom: 30px; padding: 25px; background: var(--bg-alt); border-radius: var(--radius); }
.howto-step .step-num { width: 50px; height: 50px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 20px; font-weight: 700; flex-shrink: 0; }
.howto-step .step-content h3 { font-size: 18px; margin-bottom: 8px; }
.howto-step .step-content p { font-size: 14px; color: var(--text-light); line-height: 1.7; }
/* 联系 */
.contact { padding: 80px 0; background: var(--bg-alt); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; }
.contact-info h3 { font-size: 28px; margin-bottom: 20px; }
.contact-info p { font-size: 16px; color: var(--text-light); margin-bottom: 10px; }
.contact-info .detail { display: flex; align-items: center; gap: 15px; margin-bottom: 15px; }
.contact-info .detail svg { width: 24px; height: 24px; flex-shrink: 0; }
.contact-form input, .contact-form textarea { width: 100%; padding: 14px 18px; border: 1px solid var(--border); border-radius: 8px; font-size: 15px; margin-bottom: 15px; transition: var(--transition); }
.contact-form input:focus, .contact-form textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(255,107,0,0.1); }
.contact-form textarea { height: 120px; resize: vertical; }
.contact-form button { padding: 14px 36px; background: var(--primary); color: #fff; border: none; border-radius: 50px; font-size: 16px; font-weight: 600; cursor: pointer; transition: var(--transition); }
.contact-form button:hover { background: var(--primary-dark); }
/* 页脚 */
.footer { background: #1A1A2E; color: rgba(255,255,255,0.8); padding: 50px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
.footer h4 { color: #fff; font-size: 18px; margin-bottom: 20px; }
.footer p { font-size: 14px; line-height: 1.8; }
.footer a { color: rgba(255,255,255,0.7); font-size: 14px; display: block; margin-bottom: 10px; }
.footer a:hover { color: var(--primary); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); margin-top: 40px; padding-top: 20px; text-align: center; font-size: 13px; }
/* 返回顶部 */
.back-top { position: fixed; bottom: 40px; right: 40px; width: 50px; height: 50px; border-radius: 50%; background: var(--primary); color: #fff; display: none; align-items: center; justify-content: center; cursor: pointer; box-shadow: 0 4px 15px rgba(255,107,0,0.3); transition: var(--transition); z-index: 999; border: none; font-size: 20px; }
.back-top:hover { background: var(--primary-dark); transform: translateY(-3px); }
.back-top.show { display: flex; }
/* 滚动动画 */
.fade-up { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-up.show { opacity: 1; transform: translateY(0); }
/* 数字动画 */
.count-up { display: inline-block; }
/* 搜索 */
.search-box { display: flex; align-items: center; background: var(--bg-alt); border-radius: 50px; padding: 5px 15px; }
.search-box input { border: none; background: transparent; padding: 8px 10px; font-size: 14px; width: 160px; outline: none; }
.search-box button { background: none; border: none; cursor: pointer; padding: 5px; }
/* 暗黑模式 */
.dark-mode-toggle { background: none; border: none; cursor: pointer; padding: 8px; font-size: 20px; color: var(--text); }
body.dark { --bg: #1A1A2E; --bg-alt: #222240; --text: #E8E8F0; --text-light: #A0A0B8; --border: #333355; --shadow: 0 4px 20px rgba(0,0,0,0.3); }
body.dark .header { background: rgba(26,26,46,0.98); }
body.dark .banner { background: linear-gradient(135deg, #222240 0%, #1A1A2E 100%); }
body.dark .product-card, body.dark .case-card, body.dark .faq-item { background: var(--bg-alt); }
body.dark .search-box { background: var(--bg); }
/* 响应式 */
@media (max-width: 992px) {
    .brand-grid, .contact-grid { grid-template-columns: 1fr; }
    .product-grid { grid-template-columns: 1fr 1fr; }
    .case-grid, .article-grid { grid-template-columns: 1fr 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .banner-content h1 { font-size: 36px; }
    .banner-image { display: none; }
}
@media (max-width: 768px) {
    .nav { display: none; }
    .mobile-toggle { display: flex; }
    .product-grid, .case-grid, .article-grid, .solution-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .banner-content h1 { font-size: 28px; }
    .section-title h2 { font-size: 28px; }
    .brand-stats { grid-template-columns: 1fr; }
}
```