:root{--primary:#4a3aff;--primary-light:#7b5cff;--primary-dark:#2d1fcc;--bg:#f7f7fb;--bg-card:#ffffff;--bg-elevated:#ffffff;--text:#2d2d3a;--text-secondary:#666;--text-muted:#999;--border:rgba(0,0,0,.06);--shadow-sm:0 2px 8px rgba(0,0,0,.03);--shadow-md:0 2px 16px rgba(0,0,0,.04);--shadow-lg:0 8px 24px rgba(74,58,255,.1);--glass-bg:rgba(26,26,46,.96);--glass-border:rgba(255,255,255,.08);--radius-sm:12px;--radius-md:16px;--radius-lg:24px;--transition:all .3s cubic-bezier(.4,0,.2,1)}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--text);background:var(--bg);line-height:1.8;font-size:16px;overflow-x:hidden;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
a{color:var(--primary);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--primary-dark)}
img,svg{max-width:100%;display:block}
button{font-family:inherit}
input{font-family:inherit}
::selection{background:var(--primary);color:#fff}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:rgba(74,58,255,.25);border-radius:4px}
::-webkit-scrollbar-thumb:hover{background:rgba(74,58,255,.45)}
.header{position:sticky;top:0;z-index:1000;background:var(--glass-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--glass-border);transition:background .3s ease,box-shadow .3s ease}
.header-inner{max-width:1200px;margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:20px;flex-shrink:0;transition:opacity .2s ease}
.logo:hover{color:#fff;opacity:.9}
.logo svg{width:36px;height:36px;transition:transform .3s ease}
.logo:hover svg{transform:rotate(-6deg) scale(1.05)}
.nav{display:flex;gap:24px;list-style:none;align-items:center}
.nav a{color:rgba(255,255,255,.85);font-size:15px;transition:color .2s ease,transform .2s ease;position:relative;white-space:nowrap}
.nav a::after{content:"";position:absolute;bottom:-4px;left:0;width:0;height:2px;background:linear-gradient(90deg,var(--primary),var(--primary-light));border-radius:1px;transition:width .3s ease}
.nav a:hover{color:#fff}
.nav a:hover::after{width:100%}
.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.search-box{display:flex;align-items:center;background:rgba(255,255,255,.1);border-radius:20px;padding:6px 14px;transition:background .3s ease,box-shadow .3s ease;border:1px solid transparent}
.search-box:focus-within{background:rgba(255,255,255,.16);box-shadow:0 0 0 3px rgba(74,58,255,.25);border-color:rgba(123,92,255,.4)}
.search-box input{background:none;border:none;outline:none;color:#fff;font-size:14px;width:140px;transition:width .3s ease}
.search-box input::placeholder{color:rgba(255,255,255,.5)}
.search-box input:focus{width:180px}
.search-box button{background:none;border:none;cursor:pointer;color:rgba(255,255,255,.7);padding:0;display:flex;align-items:center;transition:color .2s ease}
.search-box button:hover{color:#fff}
.theme-toggle{background:rgba(255,255,255,.1);border:none;border-radius:50%;width:36px;height:36px;cursor:pointer;color:#fff;font-size:18px;display:flex;align-items:center;justify-content:center;transition:background .3s ease,transform .3s ease}
.theme-toggle:hover{background:rgba(255,255,255,.2);transform:rotate(20deg) scale(1.05)}
.mobile-menu-btn{display:none;background:none;border:none;color:#fff;font-size:24px;cursor:pointer;padding:4px;line-height:1;transition:transform .2s ease}
.mobile-menu-btn:hover{transform:scale(1.1)}
.breadcrumb{max-width:1200px;margin:0 auto;padding:16px 20px;font-size:13px;color:var(--text-muted)}
.breadcrumb a{color:var(--text-secondary);transition:color .2s ease}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb span{margin:0 6px}
.banner{position:relative;overflow:hidden;background:linear-gradient(135deg,#1a1a2e 0%,#16213e 40%,#0f3460 70%,#1a1a2e 100%);min-height:320px;display:flex;align-items:center}
.banner::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 20% 50%,rgba(74,58,255,.25) 0%,transparent 50%),radial-gradient(circle at 80% 30%,rgba(123,92,255,.2) 0%,transparent 45%);pointer-events:none;animation:bannerGlow 8s ease-in-out infinite alternate}
@keyframes bannerGlow{0%{opacity:.7}100%{opacity:1}}
.banner-slide{display:none;width:100%;padding:60px 20px;text-align:center;position:relative;z-index:1}
.banner-slide.active{display:block;animation:fadeIn .6s ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}
.banner-slide h1,.banner-slide h2{color:#fff;font-size:32px;margin-bottom:16px;line-height:1.4;font-weight:700;text-shadow:0 2px 20px rgba(74,58,255,.3)}
.banner-slide p{color:rgba(255,255,255,.75);font-size:17px;max-width:700px;margin:0 auto 24px;line-height:1.7}
.banner-slide .cta{display:inline-block;background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;padding:12px 32px;border-radius:24px;font-size:16px;font-weight:600;transition:transform .3s ease,box-shadow .3s ease;box-shadow:0 4px 16px rgba(74,58,255,.35);position:relative;overflow:hidden}
.banner-slide .cta::before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,transparent,rgba(255,255,255,.2),transparent);transform:translateX(-100%);transition:transform .5s ease}
.banner-slide .cta:hover{transform:translateY(-3px);color:#fff;box-shadow:0 8px 28px rgba(74,58,255,.5)}
.banner-slide .cta:hover::before{transform:translateX(100%)}
.banner-dots{position:absolute;bottom:16px;left:50%;transform:translateX(-50%);display:flex;gap:8px;z-index:2}
.banner-dots span{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.3);cursor:pointer;transition:background .3s ease,width .3s ease,transform .3s ease}
.banner-dots span:hover{background:rgba(255,255,255,.6);transform:scale(1.2)}
.banner-dots span.active{background:#fff;width:24px;border-radius:4px}
.main{max-width:1200px;margin:0 auto;padding:0 20px 60px}
.section{padding:48px 0}
.section-title{font-size:26px;color:var(--text);margin-bottom:8px;font-weight:700;position:relative}
.section-title::after{content:"";display:block;width:48px;height:3px;background:linear-gradient(90deg,var(--primary),var(--primary-light));margin-top:12px;border-radius:2px}
.section-subtitle{font-size:15px;color:#777;margin-bottom:32px}
.content-block{background:var(--bg-card);border-radius:var(--radius-md);padding:32px;box-shadow:var(--shadow-md);margin-bottom:24px;transition:box-shadow .3s ease,transform .3s ease;border:1px solid var(--border)}
.content-block:hover{box-shadow:0 4px 24px rgba(74,58,255,.08)}
.content-block h3{font-size:20px;color:var(--text);margin:24px 0 12px;font-weight:700}
.content-block h3:first-child{margin-top:0}
.content-block h4{font-size:17px;color:#333;margin:18px 0 8px;font-weight:600}
.content-block p{margin-bottom:14px;color:#444;text-align:justify}
.content-block ul,.content-block ol{margin:12px 0 16px 24px}
.content-block li{margin-bottom:8px;color:#444}
.content-block strong{color:var(--text);font-weight:600}
.tag-list{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}
.tag{background:#f0eeff;color:var(--primary);padding:4px 14px;border-radius:14px;font-size:13px;transition:background .3s ease,color .3s ease,transform .2s ease;cursor:default}
.tag:hover{background:var(--primary);color:#fff;transform:translateY(-2px)}
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;margin:24px 0}
.stat-card{background:linear-gradient(135deg,#f0eeff,#e8e4ff);border-radius:var(--radius-sm);padding:24px;text-align:center;transition:transform .3s ease,box-shadow .3s ease}
.stat-card:hover{transform:translateY(-4px);box-shadow:0 8px 20px rgba(74,58,255,.12)}
.stat-card .num{font-size:32px;font-weight:700;color:var(--primary);line-height:1.2;font-variant-numeric:tabular-nums}
.stat-card .label{font-size:14px;color:#666;margin-top:4px}
.cards-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}
.card{background:var(--bg-card);border-radius:14px;padding:24px;box-shadow:var(--shadow-sm);transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;border:1px solid transparent;position:relative;overflow:hidden}
.card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--primary),var(--primary-light));transform:scaleX(0);transform-origin:left;transition:transform .3s ease}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(74,58,255,.1)}
.card:hover::before{transform:scaleX(1)}
.card h4{font-size:17px;color:var(--text);margin-bottom:10px;font-weight:600}
.card p{font-size:14px;color:#666;margin-bottom:0;line-height:1.7}
.article-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:20px}
.article-card{background:var(--bg-card);border-radius:14px;padding:24px;box-shadow:var(--shadow-sm);transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;border:1px solid transparent;display:flex;flex-direction:column}
.article-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:rgba(74,58,255,.1)}
.article-card .meta{font-size:12px;color:var(--text-muted);margin-bottom:8px;letter-spacing:.02em}
.article-card h4{font-size:16px;color:var(--text);margin-bottom:10px;line-height:1.5;font-weight:600;transition:color .2s ease}
.article-card:hover h4{color:var(--primary)}
.article-card .excerpt{font-size:14px;color:#666;margin-bottom:14px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;line-height:1.7;flex:1}
.article-card .read-more{font-size:14px;color:var(--primary);font-weight:600;transition:transform .2s ease;display:inline-flex;align-items:center;gap:4px}
.article-card .read-more:hover{transform:translateX(4px)}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--bg-card);border-radius:var(--radius-sm);overflow:hidden;box-shadow:var(--shadow-sm);transition:box-shadow .3s ease,border-color .3s ease;border:1px solid transparent}
.faq-item:hover{box-shadow:0 4px 16px rgba(74,58,255,.08);border-color:rgba(74,58,255,.08)}
.faq-question{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;color:var(--text);font-size:15px;transition:background .3s ease;user-select:none;gap:12px}
.faq-question:hover{background:#fafaff}
.faq-question .icon{font-size:20px;color:var(--primary);transition:transform .3s cubic-bezier(.4,0,.2,1);flex-shrink:0;margin-left:12px;width:24px;height:24px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:rgba(74,58,255,.08)}
.faq-item.open .faq-question .icon{transform:rotate(45deg);background:var(--primary);color:#fff}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .4s ease,padding .3s ease;padding:0 24px}
.faq-item.open .faq-answer{max-height:600px;padding:0 24px 20px}
.faq-answer p{font-size:14px;color:#555;line-height:1.8}
.howto-steps{counter-reset:step}
.howto-step{display:flex;gap:20px;margin-bottom:24px;position:relative;padding-left:0}
.howto-step::before{counter-increment:step;content:counter(step);width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;flex-shrink:0;font-size:15px;box-shadow:0 4px 12px rgba(74,58,255,.3);transition:transform .3s ease,box-shadow .3s ease}
.howto-step:hover::before{transform:scale(1.1);box-shadow:0 6px 20px rgba(74,58,255,.45)}
.howto-step .step-content h4{font-size:16px;color:var(--text);margin-bottom:6px;font-weight:600}
.howto-step .step-content p{font-size:14px;color:#666;line-height:1.7}
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.contact-item{background:var(--bg-card);border-radius:var(--radius-sm);padding:24px;text-align:center;box-shadow:var(--shadow-sm);transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;border:1px solid transparent}
.contact-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(74,58,255,.1)}
.contact-item .icon{font-size:28px;margin-bottom:12px;transition:transform .3s ease;display:inline-block}
.contact-item:hover .icon{transform:scale(1.15) rotate(-5deg)}
.contact-item h4{font-size:15px;color:var(--text);margin-bottom:6px;font-weight:600}
.contact-item p{font-size:14px;color:#666;line-height:1.6}
.footer{background:#1a1a2e;color:rgba(255,255,255,.7);padding:48px 0 24px;margin-top:40px;position:relative;overflow:hidden}
.footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(74,58,255,.5),transparent)}
.footer-inner{max-width:1200px;margin:0 auto;padding:0 20px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:32px;margin-bottom:32px}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px;font-weight:600}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:8px}
.footer-col a{color:rgba(255,255,255,.6);font-size:14px;transition:color .2s ease,padding-left .2s ease;display:inline-block}
.footer-col a:hover{color:#fff;padding-left:4px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:24px;text-align:center;font-size:13px;color:rgba(255,255,255,.4);line-height:1.8}
.footer-bottom a{color:rgba(255,255,255,.5);transition:color .2s ease}
.footer-bottom a:hover{color:#fff}
.back-to-top{position:fixed;bottom:32px;right:32px;width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;border:none;cursor:pointer;font-size:20px;display:none;align-items:center;justify-content:center;box-shadow:0 4px 16px rgba(74,58,255,.3);z-index:999;transition:transform .3s ease,box-shadow .3s ease,opacity .3s ease}
.back-to-top.show{display:flex;animation:popIn .3s ease}
.back-to-top:hover{transform:translateY(-4px) scale(1.05);box-shadow:0 8px 24px rgba(74,58,255,.5)}
@keyframes popIn{from{opacity:0;transform:scale(.8)}to{opacity:1;transform:scale(1)}}
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:translateY(0)}
body.dark{--bg:#0f0f1a;--bg-card:#1a1a2e;--text:#c8c8d4;--text-secondary:#a8a8b8;--text-muted:#888;--border:rgba(255,255,255,.06);--shadow-sm:0 2px 8px rgba(0,0,0,.2);--shadow-md:0 2px 16px rgba(0,0,0,.25);--shadow-lg:0 8px 24px rgba(0,0,0,.3)}
body.dark .content-block,body.dark .card,body.dark .article-card,body.dark .faq-item,body.dark .contact-item{background:#1a1a2e;box-shadow:0 2px 12px rgba(0,0,0,.2)}
body.dark .section-title,body.dark .content-block h3,body.dark .content-block h4,body.dark .card h4,body.dark .article-card h4,body.dark .faq-question,body.dark .howto-step .step-content h4,body.dark .contact-item h4{color:#e8e8f0}
body.dark .content-block p,body.dark .content-block li,body.dark .card p,body.dark .article-card .excerpt,body.dark .faq-answer p,body.dark .howto-step .step-content p,body.dark .contact-item p{color:#a8a8b8}
body.dark .content-block strong{color:#e8e8f0}
body.dark .section-subtitle{color:#888}
body.dark .stat-card{background:linear-gradient(135deg,#1e1e3a,#252550)}
body.dark .stat-card .num{color:#8b7aff}
body.dark .stat-card .label{color:#a0a0b0}
body.dark .breadcrumb{color:#666}
body.dark .breadcrumb a{color:#888}
body.dark .breadcrumb a:hover{color:#8b7aff}
body.dark .faq-question:hover{background:#1e1e3a}
body.dark .faq-question .icon{background:rgba(139,122,255,.12)}
body.dark .tag{background:#252550;color:#8b7aff}
body.dark .tag:hover{background:var(--primary);color:#fff}
body.dark .article-card:hover h4{color:#8b7aff}
body.dark .article-card .read-more{color:#8b7aff}
body.dark .footer{background:#0a0a14}
body.dark .card:hover,body.dark .article-card:hover,body.dark .content-block:hover{box-shadow:0 8px 28px rgba(0,0,0,.4)}
body.dark .search-box:focus-within{box-shadow:0 0 0 3px rgba(139,122,255,.3)}
body.dark ::-webkit-scrollbar-thumb{background:rgba(139,122,255,.25)}
body.dark ::-webkit-scrollbar-thumb:hover{background:rgba(139,122,255,.45)}
@media(max-width:768px){
.nav{display:none;position:absolute;top:64px;left:0;right:0;background:#1a1a2e;flex-direction:column;padding:16px 20px;gap:0;border-bottom:1px solid rgba(255,255,255,.08);box-shadow:0 8px 24px rgba(0,0,0,.3);animation:slideDown .3s ease}
@keyframes slideDown{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}
.nav.open{display:flex}
.nav li{border-bottom:1px solid rgba(255,255,255,.06)}
.nav li:last-child{border-bottom:none}
.nav a{display:block;padding:12px 0}
.nav a::after{display:none}
.mobile-menu-btn{display:block}
.search-box{display:none}
.banner-slide h1,.banner-slide h2{font-size:24px}
.banner-slide p{font-size:15px}
.banner-slide{padding:48px 20px}
.section-title{font-size:22px}
.section{padding:32px 0}
.content-block{padding:20px}
.article-list{grid-template-columns:1fr}
.cards-grid{grid-template-columns:1fr}
.stats-grid{grid-template-columns:repeat(2,1fr);gap:12px}
.stat-card{padding:16px}
.stat-card .num{font-size:24px}
.contact-grid{grid-template-columns:1fr}
.footer-grid{grid-template-columns:repeat(2,1fr);gap:24px}
.back-to-top{bottom:20px;right:20px;width:40px;height:40px}
.howto-step{gap:14px}
.howto-step::before{width:34px;height:34px;font-size:14px}
.faq-question{padding:14px 18px;font-size:14px}
.faq-answer{padding:0 18px}
.faq-item.open .faq-answer{padding:0 18px 16px}
}
@media(max-width:480px){
.header-inner{padding:0 14px;height:56px}
.logo{font-size:17px}
.logo svg{width:30px;height:30px}
.main{padding:0 14px 40px}
.banner-slide h1,.banner-slide h2{font-size:20px}
.banner-slide p{font-size:14px}
.banner-slide .cta{padding:10px 24px;font-size:14px}
.section-title{font-size:19px}
.footer-grid{grid-template-columns:1fr;gap:20px}
.stats-grid{grid-template-columns:1fr}
.article-card{padding:18px}
.card{padding:18px}
.content-block{padding:16px}
}
@media(prefers-reduced-motion:reduce){
*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
.reveal{opacity:1;transform:none}
}
@media print{
.header,.footer,.back-to-top,.banner-dots{display:none}
body{background:#fff;color:#000}
.content-block,.card,.article-card,.faq-item{box-shadow:none;border:1px solid #ddd}
}