*{margin:0;padding:0;box-sizing:border-box;font-family:system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;}
body{background:#fafafa;color:#1f2937;line-height:1.7;overflow-x:hidden;}
a{color:#2563eb;text-decoration:none;}
a:hover{text-decoration:underline;}
.container{max-width:1200px;margin:0 auto;padding:0 20px;}
/* 导航 */
nav{background:#1a1a2e;padding:15px 0;position:sticky;top:0;z-index:1000;box-shadow:0 2px 15px rgba(0,0,0,0.15);}
nav .container{display:flex;justify-content:space-between;align-items:center;}
nav .logo{font-size:1.6rem;font-weight:700;color:#e94560;}
nav .menu{display:flex;gap:25px;list-style:none;}
nav .menu li a{color:#f0f0f0;font-size:1rem;transition:color 0.3s;}
nav .menu li a:hover{color:#e94560;}
.menu-toggle{display:none;flex-direction:column;cursor:pointer;background:none;border:none;padding:5px;}
.menu-toggle span{width:28px;height:3px;background:#f0f0f0;margin:4px 0;border-radius:2px;transition:0.3s;}
@media(max-width:768px){
    .menu-toggle{display:flex;}
    nav .menu{display:none;flex-direction:column;position:absolute;top:60px;left:0;right:0;background:#1a1a2e;padding:20px;gap:15px;box-shadow:0 10px 20px rgba(0,0,0,0.3);}
    nav .menu.active{display:flex;}
}
/* 面包屑 */
.breadcrumb{background:#f1f5f9;padding:10px 0;font-size:0.9rem;}
.breadcrumb span{color:#475569;}
.breadcrumb a{color:#2563eb;}
/* 首屏渐变Banner */
.hero{background:linear-gradient(135deg,#0f3460,#16213e);color:#fff;padding:80px 0;text-align:center;position:relative;overflow:hidden;}
.hero::before{content:'';position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle,rgba(233,69,96,0.15) 0%,transparent 70%);animation:heroGlow 6s ease-in-out infinite;pointer-events:none;}
@keyframes heroGlow{0%,100%{transform:translate(0,0);}50%{transform:translate(10%,10%);}}
.hero h1{font-size:2.8rem;margin-bottom:15px;line-height:1.2;position:relative;z-index:1;}
.hero p{font-size:1.2rem;max-width:800px;margin:0 auto 30px;opacity:0.9;position:relative;z-index:1;}
.hero .cta{display:inline-block;background:#e94560;color:#fff;padding:15px 40px;border-radius:40px;font-size:1.1rem;font-weight:600;transition:0.3s;position:relative;z-index:1;}
.hero .cta:hover{background:#c23152;transform:translateY(-2px);box-shadow:0 8px 25px rgba(233,69,96,0.4);}
/* 通用区块 */
section{padding:60px 0;}
.section-title{text-align:center;margin-bottom:50px;}
.section-title h2{font-size:2.2rem;color:#0f3460;margin-bottom:10px;}
.section-title p{color:#64748b;font-size:1.05rem;max-width:700px;margin:0 auto;}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:40px;}
.grid-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:30px;}
.grid-4{display:grid;grid-template-columns:1fr 1fr 1fr 1fr;gap:25px;}
@media(max-width:768px){
    .grid-2,.grid-3,.grid-4{grid-template-columns:1fr;}
}
/* 圆角卡片 + 毛玻璃效果 + hover动画 */
.card{background:rgba(255,255,255,0.6);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-radius:16px;padding:25px;box-shadow:0 4px 12px rgba(0,0,0,0.06);transition:all 0.3s ease;border:1px solid rgba(255,255,255,0.3);}
.card:hover{transform:translateY(-8px);box-shadow:0 12px 30px rgba(0,0,0,0.12);background:rgba(255,255,255,0.85);}
.card h3{color:#0f3460;margin-bottom:10px;font-size:1.3rem;}
.card p{color:#475569;font-size:0.95rem;}
/* 品牌介绍 */
.brand-intro{background:#fff;}
.brand-intro .content{max-width:900px;margin:0 auto;}
.brand-intro h2{color:#0f3460;font-size:2rem;margin-bottom:20px;}
.brand-intro p{margin-bottom:15px;font-size:1.05rem;}
/* 文章卡片 */
.article-list .article-item{border-bottom:1px solid #e2e8f0;padding:25px 0;transition:background 0.3s;border-radius:8px;padding-left:15px;padding-right:15px;}
.article-item:last-child{border-bottom:none;}
.article-item:hover{background:rgba(37,99,235,0.05);}
.article-item h4{font-size:1.2rem;color:#0f3460;}
.article-item .meta{color:#64748b;font-size:0.9rem;margin:8px 0;}
.article-item p{color:#475569;}
.read-more{color:#2563eb;font-weight:500;}
/* FAQ */
.faq-item{border-bottom:1px solid #e2e8f0;padding:18px 0;}
.faq-question{font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;color:#0f3460;font-size:1.1rem;}
.faq-question::after{content:'+';font-size:1.5rem;transition:0.3s;}
.faq-item.active .faq-question::after{content:'−';}
.faq-answer{max-height:0;overflow:hidden;transition:max-height 0.4s ease,padding 0.4s ease;padding-top:0;color:#475569;}
.faq-item.active .faq-answer{max-height:400px;padding-top:15px;}
/* HowTo */
.howto-steps{list-style:none;padding:0;}
.howto-steps li{background:#f8fafc;margin-bottom:15px;padding:20px;border-radius:12px;border-left:4px solid #e94560;transition:transform 0.3s,box-shadow 0.3s;}
.howto-steps li:hover{transform:translateX(5px);box-shadow:0 4px 12px rgba(0,0,0,0.08);}
.howto-steps li strong{display:block;color:#0f3460;margin-bottom:5px;}
/* 底部 */
footer{background:#1a1a2e;color:#cbd5e1;padding:40px 0;}
footer .grid-4 h4{color:#f1f5f9;margin-bottom:15px;}
footer a{color:#94a3b8;}
footer a:hover{color:#e94560;}
.footer-bottom{border-top:1px solid #334155;margin-top:30px;padding-top:20px;text-align:center;font-size:0.9rem;}
/* 返回顶部 */
.back-top{position:fixed;bottom:30px;right:30px;background:#e94560;color:#fff;width:50px;height:50px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.5rem;cursor:pointer;opacity:0;visibility:hidden;transition:all 0.3s;border:none;z-index:999;box-shadow:0 4px 15px rgba(233,69,96,0.4);}
.back-top.visible{opacity:1;visibility:visible;}
.back-top:hover{transform:scale(1.1);}
/* 暗黑模式 */
.dark-mode-toggle{position:fixed;bottom:30px;left:30px;background:#1e293b;color:#fff;border:none;padding:12px 18px;border-radius:40px;cursor:pointer;z-index:999;font-size:0.9rem;transition:all 0.3s;box-shadow:0 4px 15px rgba(0,0,0,0.2);}
.dark-mode-toggle:hover{transform:scale(1.05);}
body.dark{background:#0f172a;color:#e2e8f0;}
body.dark .card{background:rgba(30,41,59,0.7);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-color:rgba(255,255,255,0.1);}
body.dark .card:hover{background:rgba(30,41,59,0.9);}
body.dark .card h3{color:#f1f5f9;}
body.dark .section-title h2{color:#f1f5f9;}
body.dark .brand-intro{background:#0f172a;}
body.dark .breadcrumb{background:#1e293b;}
body.dark .faq-question{color:#f1f5f9;}
body.dark .howto-steps li{background:#1e293b;border-left-color:#e94560;}
body.dark .article-item:hover{background:rgba(233,69,96,0.1);}
/* 图片懒加载 */
.lazy{opacity:0;transition:opacity 0.5s;}
.lazy.loaded{opacity:1;}
/* 数字动画 */
.stat-number{font-size:2.5rem;font-weight:700;color:#e94560;}
/* 轮播 */
.carousel{position:relative;overflow:hidden;border-radius:16px;background:#0f3460;color:#fff;padding:40px;min-height:200px;}
.carousel-inner{display:flex;transition:transform 0.5s;}
.carousel-item{min-width:100%;padding:20px;text-align:center;}
.carousel-item h3{font-size:1.8rem;margin-bottom:15px;}
.carousel-btn{position:absolute;top:50%;transform:translateY(-50%);background:rgba(255,255,255,0.2);color:#fff;border:none;padding:12px 16px;border-radius:50%;cursor:pointer;font-size:1.2rem;transition:background 0.3s;}
.carousel-btn:hover{background:rgba(255,255,255,0.4);}
.carousel-btn.prev{left:10px;}
.carousel-btn.next{right:10px;}
/* 滚动动画（通用入场） */
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px);}to{opacity:1;transform:translateY(0);}}
section{animation:fadeInUp 0.6s ease-out both;}
section:nth-child(2){animation-delay:0.1s;}
section:nth-child(3){animation-delay:0.2s;}
section:nth-child(4){animation-delay:0.3s;}
section:nth-child(5){animation-delay:0.4s;}
section:nth-child(6){animation-delay:0.5s;}
section:nth-child(7){animation-delay:0.6s;}
section:nth-child(8){animation-delay:0.7s;}
section:nth-child(9){animation-delay:0.8s;}
section:nth-child(10){animation-delay:0.9s;}
.card{animation:fadeInUp 0.5s ease-out both;}
.card:nth-child(1){animation-delay:0.1s;}
.card:nth-child(2){animation-delay:0.2s;}
.card:nth-child(3){animation-delay:0.3s;}
.card:nth-child(4){animation-delay:0.4s;}
/* 响应式微调 */
@media(max-width:480px){
    .hero h1{font-size:2rem;}
    .hero p{font-size:1rem;}
    .section-title h2{font-size:1.6rem;}
    nav .logo{font-size:1.3rem;}
}