*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--primary:#1a73e8;--primary-dark:#1557b0;--text:#202124;--muted:#5f6368;--bg:#fff;--light:#f8f9fa;--border:#dadce0;--radius:8px}
html{scroll-behavior:smooth}
body{font-family:"Segoe UI","Microsoft YaHei",sans-serif;color:var(--text);line-height:1.7;background:var(--bg)}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1140px;margin:0 auto;padding:0 20px}
header.site-header{position:sticky;top:0;z-index:100;background:#fff;border-bottom:1px solid var(--border);box-shadow:0 1px 3px rgba(0,0,0,.06)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.15rem;color:var(--text)}
.logo svg{width:32px;height:32px}
nav.main-nav ul{display:flex;list-style:none;gap:4px}
nav.main-nav a{display:block;padding:8px 18px;border-radius:20px;color:var(--muted);font-weight:500;transition:background .2s,color .2s}
nav.main-nav a:hover{background:var(--light);color:var(--primary);text-decoration:none}
nav.main-nav a.active{background:var(--primary);color:#fff}
.hero-official{background:linear-gradient(180deg,#e8f0fe 0%,#fff 100%);padding:72px 0 56px;text-align:center}
.hero-official h1{font-size:2.4rem;margin-bottom:16px;color:var(--text)}
.hero-official .subtitle{font-size:1.15rem;color:var(--muted);max-width:680px;margin:0 auto 28px}
.btn-primary{display:inline-flex;align-items:center;gap:8px;background:var(--primary);color:#fff;border:none;padding:14px 32px;font-size:1rem;border-radius:var(--radius);cursor:pointer;font-weight:600;transition:background .2s}
.btn-primary:hover{background:var(--primary-dark)}
.btn-primary:disabled{opacity:.7;cursor:not-allowed}
.btn-outline{background:transparent;border:2px solid var(--primary);color:var(--primary);padding:10px 22px;border-radius:var(--radius);cursor:pointer;font-weight:600;transition:all .2s}
.btn-outline:hover{background:var(--primary);color:#fff}
.version-tag{display:inline-block;margin-top:16px;font-size:.9rem;color:var(--muted)}
section{padding:56px 0}
section:nth-child(even){background:var(--light)}
.section-title{text-align:center;margin-bottom:36px}
.section-title h2{font-size:1.75rem;margin-bottom:8px}
.section-title p{color:var(--muted)}
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px}
.feature-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:28px;transition:box-shadow .2s}
.feature-card:hover{box-shadow:0 4px 16px rgba(0,0,0,.08)}
.feature-card svg{width:40px;height:40px;margin-bottom:16px;color:var(--primary)}
.feature-card h3{font-size:1.1rem;margin-bottom:10px}
.feature-card p{color:var(--muted);font-size:.95rem}
.platform-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px}
.platform-card{text-align:center;padding:24px;background:#fff;border:1px solid var(--border);border-radius:var(--radius)}
.platform-card svg{width:48px;height:48px;margin-bottom:12px}
.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat-item{padding:24px;background:#fff;border-radius:var(--radius);border:1px solid var(--border)}
.stat-item .num{font-size:2rem;font-weight:700;color:var(--primary)}
.stat-item .label{color:var(--muted);font-size:.9rem;margin-top:4px}
.deep-feature{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;margin-bottom:48px}
.deep-feature.reverse{direction:rtl}
.deep-feature.reverse>*{direction:ltr}
.deep-feature h3{font-size:1.3rem;margin-bottom:12px}
.deep-feature p{color:var(--muted);margin-bottom:12px}
.review-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}
.review-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:22px}
.review-card .stars{color:#fbbc04;margin-bottom:8px}
.review-card .author{font-weight:600;margin-top:12px;font-size:.9rem}
.compare-table{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--radius);overflow:hidden}
.compare-table th,.compare-table td{padding:14px 16px;border:1px solid var(--border);text-align:center}
.compare-table th{background:var(--primary);color:#fff}
.compare-table td:first-child{text-align:left;font-weight:600}
.scenario-list{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.scenario-item{padding:24px;background:#fff;border-left:4px solid var(--primary);border-radius:0 var(--radius) var(--radius) 0;box-shadow:0 1px 4px rgba(0,0,0,.05)}
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;background:#fff;overflow:hidden}
.faq-item summary{padding:16px 20px;cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:1.2rem;color:var(--primary)}
.faq-item[open] summary::after{content:"-"}
.faq-item .answer{padding:0 20px 16px;color:var(--muted)}
footer.site-footer{background:#202124;color:#9aa0a6;padding:32px 0;margin-top:48px}
.footer-inner{text-align:center}
.footer-verify{display:flex;align-items:center;justify-content:center;gap:8px;margin-bottom:12px;color:#e8eaed}
.footer-verify svg{width:20px;height:20px;color:#34a853}
.footer-copy{font-size:.85rem}
.download-hero{background:var(--primary);color:#fff;padding:56px 0;text-align:center}
.download-hero h1{color:#fff;margin-bottom:12px}
.download-hero .btn-primary{background:#fff;color:var(--primary)}
.download-hero .btn-primary:hover{background:#f1f3f4}
.install-steps{counter-reset:step}
.install-step{display:flex;gap:20px;margin-bottom:24px;padding:20px;background:#fff;border:1px solid var(--border);border-radius:var(--radius)}
.install-step::before{counter-increment:step;content:counter(step);flex-shrink:0;width:36px;height:36px;background:var(--primary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700}
.changelog-item{padding:20px;border-left:3px solid var(--primary);margin-bottom:16px;background:#fff;border-radius:0 var(--radius) var(--radius) 0}
.changelog-item .ver{font-weight:700;color:var(--primary)}
.changelog-item .date{font-size:.85rem;color:var(--muted)}
.article-content{max-width:820px;margin:0 auto;padding:40px 20px}
.article-content h2{margin:32px 0 16px;font-size:1.4rem}
.article-content h3{margin:24px 0 12px;font-size:1.15rem}
.article-content p{margin-bottom:16px;color:var(--muted)}
.article-content ul,.article-content ol{margin:0 0 16px 24px;color:var(--muted)}
.cta-banner{background:var(--primary);color:#fff;text-align:center;padding:40px;border-radius:var(--radius);margin:32px 0}
.cta-banner a{display:inline-block;background:#fff;color:var(--primary);padding:12px 28px;border-radius:var(--radius);font-weight:600;margin-top:12px}
.cta-banner a:hover{text-decoration:none;background:#f1f3f4}
@media(max-width:768px){
  .hero-official h1{font-size:1.75rem}
  .stats-row{grid-template-columns:repeat(2,1fr)}
  .deep-feature,.scenario-list{grid-template-columns:1fr}
  .header-inner{flex-direction:column;height:auto;padding:12px 0;gap:12px}
  nav.main-nav ul{flex-wrap:wrap;justify-content:center}
}
@keyframes spin{to{transform:rotate(360deg)}}