```css
*{margin:0;padding:0;box-sizing:border-box}
:root{--bg:#ffffff;--text:#1a1a2e;--muted:#5a5a72;--primary:#e94560;--primary-dark:#c7304a;--accent:#0f3460;--card:#f7f7fb;--border:#e4e4ee;--shadow:0 4px 18px rgba(26,26,46,.08)}
[data-theme="dark"]{--bg:#12121f;--text:#e8e8f2;--muted:#a0a0b8;--primary:#ff5c78;--primary-dark:#e94560;--accent:#5a9bd4;--card:#1c1c2e;--border:#2a2a40;--shadow:0 4px 18px rgba(0,0,0,.4)}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;background:var(--bg);color:var(--text);line-height:1.75;font-size:16px;transition:background .3s,color .3s}
a{color:var(--primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--primary-dark)}
img,svg{max-width:100%;display:block}
.container{max-width:1180px;margin:0 auto;padding:0 20px}
header.site-header{position:sticky;top:0;z-index:1000;background:var(--bg);border-bottom:1px solid var(--border);box-shadow:var(--shadow);transition:background .3s}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 0}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:20px;color:var(--text)}
.brand-mark{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;color:#fff;font-size:15px;font-weight:800}
nav.main-nav ul{display:flex;list-style:none;gap:6px;flex-wrap:wrap}
nav.main-nav a{padding:8px 12px;border-radius:8px;font-size:15px;color:var(--text);font-weight:500}
nav.main-nav a:hover,nav.main-nav a.active{background:var(--card);color:var(--primary)}
.header-tools{display:flex;align-items:center;gap:8px}
.search-box{display:flex;align-items:center;background:var(--card);border:1px solid var(--border);border-radius:8px;padding:4px 8px}
.search-box input{border:none;background:transparent;color:var(--text);outline:none;font-size:14px;width:130px;padding:4px}
.search-box button{border:none;background:var(--primary);color:#fff;border-radius:6px;padding:5px 10px;cursor:pointer;font-size:13px}
.icon-btn{background:var(--card);border:1px solid var(--border);border-radius:8px;width:38px;height:38px;cursor:pointer;font-size:16px;color:var(--text);display:flex;align-items:center;justify-content:center}
.icon-btn:hover{border-color:var(--primary);color:var(--primary)}
.menu-toggle{display:none}
.breadcrumb{padding:14px 0;font-size:14px;color:var(--muted)}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px}
.breadcrumb li+li::before{content:"›";margin-right:6px;color:var(--muted)}
.hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#1a1a2e,#0f3460);color:#fff;border-radius:18px;margin:16px 0 32px}
.slides{position:relative;min-height:340px}
.slide{position:absolute;inset:0;opacity:0;transition:opacity .6s;display:flex;flex-direction:column;justify-content:center;padding:48px 44px}
.slide.active{opacity:1;position:relative}
.slide h1{font-size:34px;line-height:1.3;margin-bottom:14px;font-weight:800}
.slide h1 span{color:#ff8fa3}
.slide p{font-size:17px;color:#d8d8e8;max-width:640px;margin-bottom:20px}
.slide .cta{display:inline-block;background:var(--primary);color:#fff;padding:11px 26px;border-radius:10px;font-weight:600;width:fit-content}
.slide .cta:hover{background:var(--primary-dark);color:#fff}
.slide-dots{display:flex;gap:8px;padding:0 44px 24px}
.slide-dots button{width:10px;height:10px;border-radius:50%;border:none;background:rgba(255,255,255,.4);cursor:pointer}
.slide-dots button.active{background:#fff;width:26px;border-radius:5px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin:0 0 40px}
.stat{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:22px;text-align:center}
.stat .num{font-size:30px;font-weight:800;color:var(--primary)}
.stat .label{font-size:14px;color:var(--muted);margin-top:4px}
section{padding:28px 0;scroll-margin-top:80px}
.section-head{margin-bottom:22px}
.section-head h2{font-size:26px;font-weight:800;color:var(--text);display:flex;align-items:center;gap:10px}
.section-head h2::before{content:"";width:6px;height:26px;border-radius:3px;background:var(--primary)}
.section-head p{color:var(--muted);margin-top:8px;font-size:15px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:22px;transition:transform .25s,box-shadow .25s}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.card h3{font-size:18px;margin-bottom:10px;color:var(--text)}
.card h4{font-size:15px;margin:12px 0 6px;color:var(--accent)}
.card p{color:var(--muted);font-size:15px}
.card ul{margin:8px 0 0 18px;color:var(--muted);font-size:15px}
.card ul li{margin-bottom:5px}
.article-card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:20px;display:flex;flex-direction:column;gap:8px}
.article-card .meta{font-size:13px;color:var(--muted);display:flex;gap:12px;flex-wrap:wrap}
.article-card h3{font-size:17px;line-height:1.5}
.article-card p{font-size:14px;color:var(--muted);flex:1}
.article-card .read{font-size:14px;font-weight:600;color:var(--primary)}
.faq-item{border:1px solid var(--border);border-radius:12px;margin-bottom:12px;overflow:hidden;background:var(--card)}
.faq-q{width:100%;text-align:left;background:transparent;border:none;padding:16px 20px;font-size:16px;font-weight:600;color:var(--text);cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-q::after{content:"+";font-size:20px;color:var(--primary);transition:transform .3s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;padding:0 20px;color:var(--muted);font-size:15px}
.faq-item.open .faq-a{max-height:400px;padding:0 20px 18px}
.howto-step{display:flex;gap:16px;padding:16px 0;border-bottom:1px dashed var(--border)}
.howto-step:last-child{border-bottom:none}
.howto-num{flex-shrink:0;width:36px;height:36px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}
.howto-step h4{font-size:16px;margin-bottom:4px}
.howto-step p{font-size:14px;color:var(--muted)}
.testimonial{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:20px}
.testimonial .quote{font-size:15px;color:var(--text);font-style:italic;margin-bottom:12px}
.testimonial .who{font-size:14px;color:var(--muted);font-weight:600}
footer.site-footer{background:var(--accent);color:#d8d8e8;margin-top:40px;padding:40px 0 20px}
footer h3{color:#fff;font-size:16px;margin-bottom:12px}
footer ul{list-style:none}
footer ul li{margin-bottom:8px;font-size:14px}
footer a{color:#c8c8dc}
footer a:hover{color:#fff}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;margin-bottom:28px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.15);padding-top:18px;font-size:13px;color:#a8a8c0;text-align:center}
.back-top{position:fixed;right:22px;bottom:22px;width:46px;height:46px;border-radius:50%;background:var(--primary);color:#fff;border:none;cursor:pointer;font-size:20px;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:opacity .3s;z-index:999}
.back-top.show{opacity:1;pointer-events:auto}
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s,transform .6s}
.reveal.visible{opacity:1;transform:none}
.tag{display:inline-block;background:var(--primary);color:#fff;font-size:12px;padding:2px 10px;border-radius:20px;margin-right:6px}
.author-box{display:flex;gap:16px;align-items:center;background:var(--card);border:1px solid var(--border);border-radius:14px;padding:18px}
.author-box .avatar{width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:18px;flex-shrink:0}
.author-box .info{font-size:14px;color:var(--muted)}
.author-box .info strong{color:var(--text);font-size:15px}
.notice{background:var(--card);border-left:4px solid var(--primary);border-radius:8px;padding:14px 18px;font-size:14px;color:var(--muted);margin-top:16px}
@media(max-width:900px){
.grid-2,.grid-3,.stats,.footer-grid{grid-template-columns:1fr}
.slide h1{font-size:26px}
.slide{padding:32px 24px}
.slide-dots{padding:0 24px 20px}
nav.main-nav{display:none;position:absolute;top:100%;left:0;right:0;background:var(--bg);border-bottom:1px solid var(--border);padding:12px 20px}
nav.main-nav.open{display:block}
nav.main-nav ul{flex-direction:column}
.menu-toggle{display:flex}
.search-box input{width:90px}
}
```