```css
*{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#1a73e8;--primary-dark:#0d47a1;--accent:#ff6d00;--bg:#f8f9fa;--card:#ffffff;--text:#202124;--text-light:#5f6368;--border:#dadce0;--success:#0f9d58;--shadow:0 1px 3px rgba(60,64,67,.15),0 1px 2px rgba(60,64,67,.1);--glass:rgba(255,255,255,.72);--glass-border:rgba(255,255,255,.35);--hero-grad:linear-gradient(135deg,#1a73e8 0%,#0d47a1 55%,#7b1fa2 100%);--radius:16px;--radius-sm:10px}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--text);background:var(--bg);line-height:1.8;font-size:15px;overflow-x:hidden;transition:background .35s ease,color .35s ease}
body.dark-mode{--bg:#0f1115;--card:#1a1d24;--text:#e8eaed;--text-light:#9aa0a6;--border:#2c313a;--shadow:0 2px 10px rgba(0,0,0,.45);--glass:rgba(26,29,36,.72);--glass-border:rgba(255,255,255,.08);--hero-grad:linear-gradient(135deg,#0d47a1 0%,#1a2a6c 55%,#4a148c 100%)}
a{color:var(--primary);text-decoration:none;transition:color .25s ease}
a:hover{text-decoration:underline}
img,svg{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
header{position:sticky;top:0;z-index:1000;background:var(--glass);backdrop-filter:blur(18px) saturate(180%);-webkit-backdrop-filter:blur(18px) saturate(180%);border-bottom:1px solid var(--glass-border);box-shadow:0 1px 0 rgba(0,0,0,.04)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:20px}
.logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700;color:var(--primary);letter-spacing:.2px}
.logo svg{width:36px;height:36px;border-radius:10px;box-shadow:0 4px 12px rgba(26,115,232,.35);transition:transform .35s cubic-bezier(.34,1.56,.64,1)}
.logo:hover{text-decoration:none}
.logo:hover svg{transform:rotate(-8deg) scale(1.06)}
nav ul{display:flex;list-style:none;gap:24px}
nav a{color:var(--text);font-size:14px;font-weight:500;position:relative;padding:4px 0}
nav a::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--primary),var(--accent));transition:width .3s ease}
nav a:hover{color:var(--primary);text-decoration:none}
nav a:hover::after{width:100%}
.header-actions{display:flex;align-items:center;gap:12px}
.search-box{position:relative;display:flex;align-items:center}
.search-box input{padding:8px 12px 8px 36px;border:1px solid var(--border);border-radius:20px;background:var(--bg);color:var(--text);font-size:14px;width:200px;outline:none;transition:width .3s ease,border-color .3s ease,box-shadow .3s ease}
.search-box input:focus{border-color:var(--primary);width:240px;box-shadow:0 0 0 3px rgba(26,115,232,.15)}
.search-box svg{position:absolute;left:10px;width:18px;height:18px;fill:var(--text-light);pointer-events:none}
.theme-toggle{background:var(--card);border:1px solid var(--border);border-radius:50%;width:36px;height:36px;cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--text);transition:transform .35s cubic-bezier(.34,1.56,.64,1),background .25s ease,border-color .25s ease}
.theme-toggle:hover{transform:rotate(25deg) scale(1.08);border-color:var(--primary);color:var(--primary)}
.mobile-menu-btn{display:none;background:none;border:none;cursor:pointer;padding:8px}
.mobile-menu-btn span{display:block;width:22px;height:2px;background:var(--text);margin:5px 0;transition:.3s;border-radius:2px}
.breadcrumb{background:var(--card);border-bottom:1px solid var(--border);padding:12px 0;font-size:13px;color:var(--text-light)}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px}
.breadcrumb li::after{content:"›";margin-left:6px;color:var(--text-light)}
.breadcrumb li:last-child::after{content:""}
.hero{background:var(--hero-grad);color:#fff;padding:70px 0;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;top:-40%;right:-10%;width:520px;height:520px;background:radial-gradient(circle,rgba(255,255,255,.18) 0%,transparent 70%);border-radius:50%;pointer-events:none}
.hero::after{content:"";position:absolute;bottom:-50%;left:-10%;width:460px;height:460px;background:radial-gradient(circle,rgba(255,109,0,.22) 0%,transparent 70%);border-radius:50%;pointer-events:none}
.hero-inner{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;position:relative;z-index:1}
.hero h1{font-size:36px;line-height:1.4;margin-bottom:16px;font-weight:800;letter-spacing:.3px;text-shadow:0 2px 20px rgba(0,0,0,.18)}
.hero p{font-size:16px;opacity:.95;margin-bottom:24px}
.hero-btns{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 28px;border-radius:12px;font-size:15px;font-weight:600;cursor:pointer;border:none;transition:transform .3s cubic-bezier(.34,1.56,.64,1),box-shadow .3s ease,background .3s ease;position:relative;overflow:hidden}
.btn-primary{background:#fff;color:var(--primary);box-shadow:0 6px 20px rgba(0,0,0,.18)}
.btn-primary:hover{background:#f1f3f4;text-decoration:none;transform:translateY(-3px);box-shadow:0 10px 26px rgba(0,0,0,.25)}
.btn-outline{background:rgba(255,255,255,.08);color:#fff;border:2px solid rgba(255,255,255,.6);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.btn-outline:hover{background:rgba(255,255,255,.18);text-decoration:none;transform:translateY(-3px);box-shadow:0 10px 26px rgba(0,0,0,.2)}
.hero-visual{display:flex;justify-content:center}
.carousel{position:relative;width:100%;max-width:400px;height:280px;border-radius:20px;overflow:hidden;background:rgba(255,255,255,.12);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid rgba(255,255,255,.28);box-shadow:0 20px 50px rgba(0,0,0,.28)}
.carousel-slide{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:30px;opacity:0;transition:opacity .6s ease;text-align:center}
.carousel-slide.active{opacity:1}
.carousel-slide svg{width:80px;height:80px;margin-bottom:16px;filter:drop-shadow(0 6px 14px rgba(0,0,0,.2))}
.carousel-slide h3{font-size:20px;margin-bottom:8px}
.carousel-slide p{font-size:14px;opacity:.9}
.carousel-dots{position:absolute;bottom:12px;left:50%;transform:translateX(-50%);display:flex;gap:8px}
.carousel-dots button{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.4);border:none;cursor:pointer;padding:0;transition:width .3s ease,background .3s ease}
.carousel-dots button.active{background:#fff;width:20px;border-radius:4px}
.stats{background:var(--card);padding:40px 0;border-bottom:1px solid var(--border)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat-item{padding:14px 8px;border-radius:var(--radius);transition:transform .35s ease,background .35s ease}
.stat-item:hover{transform:translateY(-5px);background:var(--bg)}
.stat-item .num{font-size:36px;font-weight:800;color:var(--primary);line-height:1.2;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.stat-item .label{font-size:14px;color:var(--text-light);margin-top:4px}
section{padding:60px 0}
section:nth-child(even){background:var(--card)}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:28px;font-weight:700;margin-bottom:12px}
.section-title p{color:var(--text-light);font-size:15px;max-width:700px;margin:0 auto}
.anchor-nav{background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid var(--glass-border);border-radius:var(--radius);padding:20px;margin-bottom:40px;box-shadow:var(--shadow)}
.anchor-nav h3{font-size:16px;margin-bottom:12px;color:var(--text)}
.anchor-nav ul{list-style:none;display:flex;flex-wrap:wrap;gap:10px}
.anchor-nav a{display:inline-block;padding:6px 14px;background:var(--bg);border-radius:20px;font-size:13px;color:var(--text);border:1px solid var(--border);transition:all .3s ease}
.anchor-nav a:hover{background:var(--primary);color:#fff;border-color:var(--primary);text-decoration:none;transform:translateY(-2px);box-shadow:0 6px 16px rgba(26,115,232,.28)}
.content-block{max-width:900px;margin:0 auto}
.content-block h2{font-size:24px;margin:40px 0 16px;padding-bottom:10px;border-bottom:2px solid var(--primary);display:inline-block}
.content-block h3{font-size:19px;margin:28px 0 12px;color:var(--primary-dark)}
body.dark-mode .content-block h3{color:#8ab4f8}
.content-block h4{font-size:16px;margin:20px 0 10px}
.content-block p{margin-bottom:14px;color:var(--text)}
.content-block ul,.content-block ol{margin:12px 0 18px 24px}
.content-block li{margin-bottom:8px}
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.feature-card{background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid var(--glass-border);border-radius:var(--radius);padding:28px;transition:transform .35s cubic-bezier(.34,1.56,.64,1),box-shadow .35s ease,border-color .35s ease;box-shadow:var(--shadow)}
.feature-card:hover{transform:translateY(-6px);box-shadow:0 16px 40px rgba(60,64,67,.18);border-color:rgba(26,115,232,.35)}
body.dark-mode .feature-card:hover{box-shadow:0 16px 40px rgba(0,0,0,.55)}
.feature-card svg{width:48px;height:48px;margin-bottom:16px;transition:transform .35s cubic-bezier(.34,1.56,.64,1)}
.feature-card:hover svg{transform:scale(1.12) rotate(-4deg)}
.feature-card h3{font-size:17px;margin-bottom:10px}
.feature-card p{font-size:14px;color:var(--text-light)}
.article-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px}
.article-card{background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid var(--glass-border);border-radius:var(--radius);padding:24px;transition:transform .35s ease,box-shadow .35s ease,border-color .35s ease;display:flex;flex-direction:column;box-shadow:var(--shadow)}
.article-card:hover{box-shadow:0 16px 40px rgba(60,64,67,.18);transform:translateY(-5px);border-color:rgba(26,115,232,.35)}
body.dark-mode .article-card:hover{box-shadow:0 16px 40px rgba(0,0,0,.55)}
.article-card .meta{font-size:12px;color:var(--text-light);margin-bottom:10px;display:flex;gap:12px;flex-wrap:wrap}
.article-card h3{font-size:17px;margin-bottom:10px;line-height:1.5}
.article-card p{font-size:14px;color:var(--text-light);flex:1;margin-bottom:14px}
.article-card .read-more{font-size:14px;font-weight:600;color:var(--primary);transition:transform .3s ease,letter-spacing .3s ease}
.article-card:hover .read-more{letter-spacing:.5px}
.faq-list{max-width:900px;margin:0 auto}
.faq-item{border:1px solid var(--border);border-radius:var(--radius-sm);margin-bottom:12px;overflow:hidden;background:var(--glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);transition:box-shadow .3s ease,border-color .3s ease}
.faq-item:hover{border-color:rgba(26,115,232,.35);box-shadow:0 8px 24px rgba(60,64,67,.12)}
body.dark-mode .faq-item:hover{box-shadow:0 8px 24px rgba(0,0,0,.45)}
.faq-question{width:100%;text-align:left;padding:18px 20px;background:none;border:none;cursor:pointer;font-size:15px;font-weight:600;color:var(--text);display:flex;justify-content:space-between;align-items:center;gap:12px;transition:background .25s ease}
.faq-question:hover{background:rgba(26,115,232,.06)}
.faq-question svg{width:20px;height:20px;flex-shrink:0;transition:transform .35s cubic-bezier(.34,1.56,.64,1);fill:var(--primary)}
.faq-item.open .faq-question svg{transform:rotate(180deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .45s ease,padding .45s ease;padding:0 20px}
.faq-item.open .faq-answer{max-height:800px;padding:0 20px 20px}
.faq-answer p{font-size:14px;color:var(--text-light);margin-bottom:10px}
.case-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px}
.case-card{background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid var(--glass-border);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);transition:transform .35s ease,box-shadow .35s ease}
.case-card:hover{transform:translateY(-5px);box-shadow:0 16px 40px rgba(60,64,67,.16)}
body.dark-mode .case-card:hover{box-shadow:0 16px 40px rgba(0,0,0,.5)}
.case-card h3{font-size:17px;margin-bottom:10px;color:var(--primary-dark)}
body.dark-mode .case-card h3{color:#8ab4f8}
.case-card p{font-size:14px;color:var(--text-light);margin-bottom:8px}
.testimonial{background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-left:4px solid var(--primary);border-radius:var(--radius-sm);padding:20px 24px;margin-bottom:16px;box-shadow:var(--shadow);transition:transform .35s ease,box-shadow .35s ease}
.testimonial:hover{transform:translateX(6px);box-shadow:0 12px 30px rgba(60,64,67,.15)}
body.dark-mode .testimonial:hover{box-shadow:0 12px 30px rgba(0,0,0,.5)}
.testimonial p{font-size:14px;font-style:italic;margin-bottom:10px}
.testimonial .author{font-size:13px;color:var(--text-light);font-weight:600}
.howto-steps{counter-reset:step;max-width:900px;margin:0 auto}
.howto-step{position:relative;padding:0 0 30px 60px;counter-increment:step}
.howto-step::before{content:counter(step);position:absolute;left:0;top:0;width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;box-shadow:0 6px 16px rgba(26,115,232,.35);transition:transform .35s cubic-bezier(.34,1.56,.64,1)}
.howto-step:hover::before{transform:scale(1.12)}
.howto-step::after{content:"";position:absolute;left:19px;top:44px;bottom:0;width:2px;background:linear-gradient(180deg,var(--border),transparent)}
.howto-step:last-child::after{display:none}
.howto-step h3{font-size:17px;margin-bottom:8px}
.howto-step p{font-size:14px;color:var(--text-light)}
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px}
.contact-card{background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid var(--glass-border);border-radius:var(--radius);padding:24px;text-align:center;transition:transform .35s ease,box-shadow .35s ease,border-color .35s ease;box-shadow:var(--shadow)}
.contact-card:hover{transform:translateY(-6px);border-color:rgba(26,115,232,.35);box-shadow:0 16px 40px rgba(60,64,67,.16)}
body.dark-mode .contact-card:hover{box-shadow:0 16px 40px rgba(0,0,0,.5)}
.contact-card svg{width:40px;height:40px;margin:0 auto 12px;fill:var(--primary);transition:transform .35s cubic-bezier(.34,1.56,.64,1)}
.contact-card:hover svg{transform:scale(1.15)}
.contact-card h3{font-size:16px;margin-bottom:8px}
.contact-card p{font-size:14px;color:var(--text-light)}
footer{background:#202124;color:#e8eaed;padding:50px 0 20px;font-size:14px}
footer a{color:#9aa0a6;transition:color .25s ease}
footer a:hover{color:#fff}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:30px;margin-bottom:30px}
.footer-col h4{font-size:15px;margin-bottom:14px;color:#fff}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:8px}
.footer-bottom{border-top:1px solid #3c4043;padding-top:20px;text-align:center;font-size:13px;color:#9aa0a6}
.footer-bottom p{margin-bottom:6px}
.back-to-top{position:fixed;bottom:24px;right:24px;width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;border:none;cursor:pointer;display:none;align-items:center;justify-content:center;box-shadow:0 6px 20px rgba(26,115,232,.45);z-index:999;transition:transform .35s cubic-bezier(.34,1.56,.64,1),box-shadow .35s ease}
.back-to-top.show{display:flex}
.back-to-top:hover{transform:translateY(-4px) scale(1.08);box-shadow:0 12px 30px rgba(26,115,232,.55)}
.back-to-top svg{width:20px;height:20px;fill:#fff}
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s cubic-bezier(.22,1,.36,1),transform .7s cubic-bezier(.22,1,.36,1)}
.reveal.visible{opacity:1;transform:translateY(0)}
.sitemap-links{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:16px}
.sitemap-links a{font-size:13px;color:var(--text-light);padding:4px 10px;border:1px solid var(--border);border-radius:8px;transition:all .3s ease}
.sitemap-links a:hover{color:var(--primary);border-color:var(--primary);text-decoration:none;transform:translateY(-2px);box-shadow:0 6px 16px rgba(26,115,232,.18)}
@media(max-width:900px){
.hero-inner{grid-template-columns:1fr}
.hero h1{font-size:28px}
.stats-grid{grid-template-columns:repeat(2,1fr)}
nav ul{display:none;position:absolute;top:64px;left:0;right:0;background:var(--glass);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);flex-direction:column;padding:16px;border-bottom:1px solid var(--border);gap:0;box-shadow:0 12px 30px rgba(0,0,0,.12)}
nav ul.open{display:flex}
nav ul li{padding:10px 0;border-bottom:1px solid var(--border)}
nav ul li:last-child{border-bottom:none}
nav a::after{display:none}
.mobile-menu-btn{display:block}
.search-box input{width:140px}
.search-box input:focus{width:160px}
}
@media(max-width:600px){
.hero{padding:48px 0}
.hero h1{font-size:24px}
.hero p{font-size:15px}
.section-title h2{font-size:22px}
.stats-grid{grid-template-columns:1fr 1fr}
.stat-item .num{font-size:28px}
.search-box{display:none}
.carousel{height:240px}
.btn{padding:11px 22px;font-size:14px}
section{padding:44px 0}
.content-block h2{font-size:20px}
.content-block h3{font-size:17px}
.howto-step{padding-left:52px}
.howto-step::before{width:34px;height:34px;font-size:14px}
.howto-step::after{left:16px;top:38px}
}
@media(prefers-reduced-motion:reduce){
*{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
.reveal{opacity:1;transform:none}
}
```