:root{color-scheme:light}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:#0f172a;background:#f8fafc}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
.page{min-height:100vh;display:flex;flex-direction:column}
.container{width:min(1120px,92%);margin:0 auto}
.header{position:sticky;top:0;z-index:10;background:rgba(248,250,252,.9);backdrop-filter:blur(14px);border-bottom:1px solid #e2e8f0}
.nav{display:flex;align-items:center;justify-content:space-between;padding:16px 0}
.brand{display:flex;align-items:center;gap:12px;font-weight:600;color:#0f172a}
.brand img{width:36px;height:36px}
.nav-links{display:flex;gap:18px;font-size:14px;color:#475569}
.hero{padding:72px 0 48px;background:linear-gradient(135deg,#e0f2fe 0%,#f8fafc 55%)}
.hero-grid{display:grid;gap:32px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));align-items:center}
.eyebrow{font-size:13px;letter-spacing:.16em;text-transform:uppercase;color:#0ea5e9;margin:0 0 12px}
.hero-title{font-size:clamp(32px,4vw,54px);margin:0 0 16px}
.hero-desc{font-size:18px;color:#475569;margin:0 0 24px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;padding:12px 22px;font-weight:600;font-size:15px;border:1px solid transparent;gap:8px}
.btn-icon{width:20px;height:20px;object-fit:contain}
.btn.primary{background:#0ea5e9;color:#fff;box-shadow:0 12px 24px rgba(14,165,233,.25)}
.btn.ghost{background:#fff;border-color:#cbd5f5;color:#0f172a}
.btn.baidu{background:#06A7FF;color:#fff;box-shadow:0 12px 24px rgba(6,167,255,.25)}
.btn.quark{background:#2468f2;color:#fff;box-shadow:0 12px 24px rgba(36,104,242,.25)}
.cta-buttons{display:flex;gap:12px;flex-wrap:wrap}
.hero-media{background:#fff;border-radius:24px;padding:18px;box-shadow:0 24px 60px rgba(15,23,42,.12)}
.hero-image{width:100%;max-width:592px;margin:0 auto}
.gallery{padding:32px 0}
.gallery-grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}
.gallery-img{width:100%;max-width:333px;margin:0 auto;border-radius:16px;box-shadow:0 16px 40px rgba(15,23,42,.12)}
.features,.comments,.posts,.promotions{padding:56px 0}
.section-title{text-align:center;margin:0 0 28px;font-size:28px}
.feature-grid,.comment-grid,.post-grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.feature-card,.comment-card,.post-card{padding:20px;border-radius:18px;background:#fff;box-shadow:0 12px 28px rgba(15,23,42,.08);transition:transform .2s,box-shadow .2s;border-top:4px solid #0ea5e9}
.post-card{display:flex;flex-direction:column;height:100%}
.feature-card:hover,.comment-card:hover,.post-card:hover{transform:translateY(-4px);box-shadow:0 20px 40px rgba(15,23,42,.12)}
.feature-title,.comment-title,.post-title{margin:0 0 8px;font-size:18px}
.post-title{font-size:20px;font-weight:600;line-height:1.4;margin-bottom:12px}
.feature-desc,.comment-desc{margin:0;color:#475569;line-height:1.6}
.article{padding:72px 0}
.article-card{background:#fff;border-radius:24px;box-shadow:0 18px 48px rgba(15,23,42,.08);padding:32px}
.article-title{margin:0 0 16px;font-size:clamp(28px,3vw,40px)}
.article-meta{margin:0 0 12px;color:#94a3b8;font-size:14px}
.article-content{line-height:1.8;color:#0f172a}
.article-content h2{margin:24px 0 12px;font-size:22px}
.article-content p{margin:0 0 16px;color:#475569}
.post-title{margin:0 0 12px;font-size:20px;font-weight:600;line-height:1.4}
.post-meta{font-size:13px;color:#94a3b8;margin:0 0 12px}
.post-summary{margin:0;color:#475569;font-size:15px;line-height:1.6;flex:1}
.post-link{display:inline-block;margin-top:16px;color:#0ea5e9;font-weight:600;font-size:14px}
.post-link:hover{text-decoration:underline}

/* Carousel */
.carousel-container{position:relative}
.carousel-track-container{overflow:hidden;padding:20px 12px 40px}
.carousel-track{display:flex;gap:20px;overflow-x:auto;scroll-behavior:smooth;scrollbar-width:none;padding:0;margin:0;list-style:none;scroll-snap-type:x mandatory}
.carousel-track::-webkit-scrollbar{display:none}
.carousel-slide{flex:0 0 calc((100% - 40px) / 3);min-width:0;scroll-snap-align:start}
.carousel-btn{position:absolute;top:50%;transform:translateY(-50%);margin-top:-10px;background:#fff;border:1px solid #e2e8f0;border-radius:50%;width:44px;height:44px;cursor:pointer;z-index:10;box-shadow:0 4px 12px rgba(0,0,0,0.1);display:flex;align-items:center;justify-content:center;font-size:20px;color:#0ea5e9;transition:all .2s}
.carousel-btn:hover{background:#f8fafc;transform:translateY(-50%) scale(1.1)}
.carousel-btn.disabled{opacity:.5;cursor:not-allowed;pointer-events:none}
.prev-btn{left:-22px}
.next-btn{right:-22px}

.cta{padding:28px 0 72px}
.cta-card{display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between;background:#0f172a;color:#fff;padding:28px;border-radius:22px}
.cta-title{margin:0 0 8px;font-size:24px}
.cta-desc{margin:0;color:#cbd5f5}
.footer{padding:28px 0;border-top:1px solid #e2e8f0;color:#64748b;font-size:14px;text-align:center}

/* Promotion Card */
.promotion-card{padding:16px;border-radius:12px;background:#fff;box-shadow:0 4px 12px rgba(15,23,42,.05);display:flex;align-items:center;gap:12px;border:1px solid #e2e8f0;transition:box-shadow .2s;height:100%}
.promotion-card:hover{box-shadow:0 8px 16px rgba(15,23,42,.08);border-color:#0ea5e9}
.promotion-icon{width:48px;height:48px;object-fit:contain}
.promotion-title{margin:0;font-size:16px;font-weight:500;color:#0f172a}

@media (max-width:1024px){
  .carousel-slide{flex:0 0 calc((100% - 20px) / 2)}
}
@media (max-width:720px){
  .header{backdrop-filter:none;background:#f8fafc;border-bottom:1px solid #e2e8f0}
  .nav{padding:12px 0}
  .nav-links a:not([href="/#download"]){display:none}
  .nav-links a[href="/#download"]{background:#0ea5e9;color:#fff;padding:6px 16px;border-radius:999px;font-size:14px;font-weight:600}
  .cta-card{flex-direction:column;align-items:flex-start}
  .hero{padding:48px 0 32px;text-align:center}
  .hero-grid{gap:40px}
  .hero-actions{justify-content:center}
  .hero-image{max-width:100%}
  .section-title{font-size:24px}
  .features,.comments,.promotions{padding:40px 0}
  .cta-buttons,.btn{width:100%}
  .carousel-slide{flex:0 0 calc(100% - 32px)}
  .carousel-btn{width:36px;height:36px;font-size:16px}
}