*{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#6366f1;--primary-light:#818cf8;--primary-dark:#4f46e5;
  --accent:#8b5cf6;--accent-light:#a78bfa;
  --success:#10b981;--warning:#f59e0b;--danger:#ef4444;
  --text:#0f172a;--text-secondary:#475569;--text-muted:#94a3b8;
  --bg:#fafbff;--card:#ffffff;--border:#e2e8f0;--border-light:#f1f5f9;
  --radius:16px;--radius-sm:10px;--radius-xs:8px;
  --shadow-sm:0 1px 2px rgba(0,0,0,.05);
  --shadow:0 4px 6px -1px rgba(0,0,0,.07),0 2px 4px -2px rgba(0,0,0,.05);
  --shadow-lg:0 10px 15px -3px rgba(0,0,0,.08),0 4px 6px -4px rgba(0,0,0,.05);
  --shadow-xl:0 20px 25px -5px rgba(0,0,0,.1),0 8px 10px -6px rgba(0,0,0,.04);
  --gradient-primary:linear-gradient(135deg,#6366f1 0%,#8b5cf6 50%,#a78bfa 100%);
  --gradient-dark:linear-gradient(135deg,#1e1b4b 0%,#312e81 40%,#4338ca 100%);
  --gradient-hero:linear-gradient(135deg,#0f0c29 0%,#302b63 50%,#24243e 100%);
}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;color:var(--text);background:var(--bg);line-height:1.8;font-size:15px;overflow-x:hidden}
a{color:var(--primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--primary-dark)}

/* ===== Topbar ===== */
.topbar{background:rgba(15,12,41,.95);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);color:#fff;padding:0 32px;height:60px;display:flex;align-items:center;position:sticky;top:0;z-index:100;border-bottom:1px solid rgba(255,255,255,.06)}
.topbar .logo{font-weight:700;font-size:18px;letter-spacing:.5px;margin-right:auto;text-decoration:none;color:#fff;display:flex;align-items:center;gap:8px}
.topbar a{color:rgba(255,255,255,.7);text-decoration:none;font-size:13.5px;padding:6px 14px;border-radius:8px;transition:all .2s}
.topbar a:hover{color:#fff;background:rgba(255,255,255,.1)}
.topbar .back{display:inline-flex;align-items:center;gap:4px;font-weight:500}
.topbar .nav-links{display:flex;gap:4px;align-items:center}

/* ===== Hero ===== */
.hero{background:var(--gradient-hero);color:#fff;padding:80px 32px 72px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle at 30% 50%,rgba(99,102,241,.15) 0%,transparent 50%),radial-gradient(circle at 70% 50%,rgba(139,92,246,.12) 0%,transparent 50%);animation:heroFloat 20s ease-in-out infinite}
@keyframes heroFloat{0%,100%{transform:translate(0,0) rotate(0deg)}50%{transform:translate(-2%,1%) rotate(1deg)}}
.hero-content{position:relative;z-index:1;max-width:800px;margin:0 auto}
.hero h1{font-size:44px;font-weight:800;margin-bottom:12px;letter-spacing:-1px;background:linear-gradient(135deg,#fff 0%,#c7d2fe 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero .subtitle{font-size:18px;opacity:.8;max-width:600px;margin:0 auto 28px;line-height:1.7;font-weight:300}
.hero .badge{display:inline-block;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.15);padding:6px 20px;border-radius:24px;font-size:13px;backdrop-filter:blur(8px);margin-bottom:32px}
.hero-buttons{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero-btn{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:12px;font-size:15px;font-weight:600;text-decoration:none;transition:all .25s;cursor:pointer;border:none}
.hero-btn.primary{background:linear-gradient(135deg,#6366f1,#8b5cf6);color:#fff;box-shadow:0 4px 15px rgba(99,102,241,.4)}
.hero-btn.primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(99,102,241,.5);color:#fff}
.hero-btn.secondary{background:rgba(255,255,255,.1);color:#fff;border:1px solid rgba(255,255,255,.2);backdrop-filter:blur(8px)}
.hero-btn.secondary:hover{background:rgba(255,255,255,.18);transform:translateY(-2px);color:#fff}
.hero-stats{display:flex;gap:48px;justify-content:center;margin-top:48px}
.hero-stat{text-align:center}
.hero-stat .num{font-size:32px;font-weight:800;background:linear-gradient(135deg,#818cf8,#a78bfa);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-stat .label{font-size:13px;opacity:.6;margin-top:2px}

/* ===== Highlights ===== */
.highlights{max-width:1100px;margin:0 auto;padding:64px 24px}
.section-title{text-align:center;margin-bottom:48px}
.section-title h2{font-size:32px;font-weight:800;color:var(--text);margin-bottom:8px;letter-spacing:-.5px}
.section-title p{font-size:16px;color:var(--text-secondary);max-width:500px;margin:0 auto}
.highlight-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.highlight-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:32px 24px;text-align:center;transition:all .3s;position:relative;overflow:hidden}
.highlight-card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--gradient-primary);opacity:0;transition:opacity .3s}
.highlight-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-xl);border-color:var(--primary-light)}
.highlight-card:hover::before{opacity:1}
.highlight-icon{width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:26px;margin:0 auto 16px;background:linear-gradient(135deg,rgba(99,102,241,.08),rgba(139,92,246,.08))}
.highlight-card h3{font-size:17px;font-weight:700;margin-bottom:8px;color:var(--text)}
.highlight-card p{font-size:13.5px;color:var(--text-secondary);line-height:1.7}

/* ===== Cards ===== */
.cards-wrap{max-width:1100px;margin:0 auto;padding:0 24px 64px}
.cards-wrap .section-header{display:flex;align-items:center;gap:12px;margin:48px 0 20px}
.cards-wrap .section-header h2{font-size:24px;font-weight:700;color:var(--text);margin:0}
.cards-wrap .section-header:first-child{margin-top:0}
.cards-wrap .section-tag{display:inline-block;background:linear-gradient(135deg,rgba(99,102,241,.08),rgba(139,92,246,.08));color:var(--primary);font-size:12px;font-weight:600;padding:4px 12px;border-radius:6px}
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;text-decoration:none;color:var(--text);transition:all .25s;display:flex;gap:16px;align-items:flex-start}
.card:hover{border-color:var(--primary-light);box-shadow:var(--shadow-lg);transform:translateY(-2px);color:var(--text)}
.card .icon{width:44px;height:44px;min-width:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:20px;background:linear-gradient(135deg,rgba(99,102,241,.06),rgba(139,92,246,.06))}
.card .card-content{flex:1}
.card h3{font-size:15px;font-weight:700;margin-bottom:4px}
.card p{font-size:13px;color:var(--text-secondary);line-height:1.6;margin:0}
.card .step-badge{display:inline-block;background:var(--primary);color:#fff;font-size:11px;font-weight:700;padding:1px 8px;border-radius:4px;margin-bottom:6px}

/* ===== Mobile CTA ===== */
.mobile-cta{background:var(--gradient-dark);color:#fff;padding:64px 32px;text-align:center}
.mobile-cta h2{font-size:30px;font-weight:800;margin-bottom:10px;color:#fff}
.mobile-cta p{font-size:16px;opacity:.75;margin-bottom:28px;max-width:500px;margin-left:auto;margin-right:auto}
.mobile-cta .hero-btn{display:inline-flex}

/* ===== Sub-page Hero ===== */
.page-hero{background:var(--gradient-hero);color:#fff;padding:52px 32px 40px;text-align:center;position:relative;overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 50% 50%,rgba(99,102,241,.1) 0%,transparent 70%)}
.page-hero h1{font-size:30px;font-weight:800;margin-bottom:8px;position:relative}
.page-hero p{font-size:15px;opacity:.75;position:relative}

/* ===== Content ===== */
.content{max-width:860px;margin:0 auto;padding:40px 28px 100px}
.content h2{font-size:24px;font-weight:700;margin:40px 0 16px;padding-bottom:10px;border-bottom:2px solid transparent;border-image:var(--gradient-primary) 1;color:var(--text)}
.content h2:first-child{margin-top:0}
.content h3{font-size:18px;font-weight:600;margin:28px 0 10px;color:var(--text)}
.content h4{font-size:15px;font-weight:600;margin:20px 0 8px;color:var(--text)}
.content p{margin:8px 0}
.content ul,.content ol{margin:8px 0 12px 22px}
.content li{margin:5px 0}
.content strong{color:var(--text)}
.content img{max-width:100%;border-radius:var(--radius-xs);margin:12px 0}

/* ===== Table ===== */
table{width:100%;border-collapse:collapse;margin:12px 0 20px;font-size:14px;background:var(--card);border-radius:var(--radius-sm);overflow:hidden;box-shadow:var(--shadow)}
th{background:var(--gradient-primary);color:#fff;padding:12px 16px;text-align:left;font-weight:600;font-size:13px}
td{padding:10px 16px;border-bottom:1px solid var(--border-light)}
tr:last-child td{border-bottom:none}
tr:nth-child(even){background:rgba(99,102,241,.02)}
code{background:rgba(99,102,241,.06);padding:2px 6px;border-radius:4px;font-size:13px;font-family:Consolas,"Courier New",monospace;color:var(--primary)}

/* ===== Tip / Warn ===== */
.tip,.warn{padding:16px 20px;border-radius:var(--radius-sm);margin:14px 0;font-size:14px;line-height:1.7}
.tip{background:rgba(16,185,129,.06);border-left:4px solid var(--success);color:#065f46}
.warn{background:rgba(245,158,11,.06);border-left:4px solid var(--warning);color:#92400e}

/* ===== Step ===== */
.step{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:20px 24px;margin:16px 0;box-shadow:var(--shadow-sm);transition:all .2s}
.step:hover{border-color:var(--primary-light);box-shadow:var(--shadow)}
.step-num{display:inline-flex;align-items:center;justify-content:center;background:var(--gradient-primary);color:#fff;width:26px;height:26px;border-radius:50%;font-size:13px;font-weight:700;margin-right:8px}

/* ===== Screenshot ===== */
.screenshot{text-align:center;margin:20px 0;border-radius:var(--radius-xs);overflow:hidden}
.screenshot img{max-width:100%;display:block;margin:0 auto;border-radius:var(--radius-xs);border:1px solid var(--border);box-shadow:var(--shadow);cursor:zoom-in;transition:box-shadow .2s}
.screenshot img:hover{box-shadow:var(--shadow-lg)}
.screenshot p{font-size:12px;color:var(--text-muted);margin:8px 0 0}
.screenshot.no-img{background:var(--border-light);border:2px dashed var(--border);padding:24px;color:var(--text-muted);font-size:14px}
.screenshot.no-img img,.screenshot.no-img p{display:none}
.screenshot.no-img::after{content:attr(data-label)}
.screenshot-compare{display:flex;gap:12px;margin:20px 0}
.screenshot-compare .compare-item{flex:1;text-align:center}
.screenshot-compare .compare-item img{max-width:100%;border-radius:var(--radius-xs);border:1px solid var(--border);box-shadow:var(--shadow);cursor:zoom-in}
.screenshot-compare .compare-label{font-size:13px;font-weight:600;color:var(--primary);margin-bottom:6px}
.screenshot-compare .compare-item p{font-size:11px;color:var(--text-muted);margin:6px 0 0}

/* ===== Video ===== */
.video-box{margin:24px 0;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--border)}
.video-box video{width:100%;display:block;background:#000}
.video-box p{text-align:center;padding:10px;color:var(--text-muted);font-size:13px;background:var(--card);margin:0;border-top:1px solid var(--border)}
.video-box.no-video video{display:none}
.video-box.no-video{background:rgba(99,102,241,.03);border:2px dashed var(--primary-light);padding:28px;text-align:center}
.video-box.no-video p{border:none;color:var(--primary);font-weight:600;font-size:14px}

/* ===== Page Nav ===== */
.page-nav{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);width:calc(100% - 48px);max-width:720px;display:flex;justify-content:space-between;gap:12px;padding:10px 12px;background:rgba(255,255,255,.92);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-radius:var(--radius);box-shadow:var(--shadow-xl),0 0 0 1px rgba(99,102,241,.06);z-index:200}
.page-nav a{display:flex;flex-direction:column;padding:12px 20px;background:transparent;border:1.5px solid var(--border);border-radius:12px;text-decoration:none;color:var(--text);transition:all .2s;min-width:160px;flex:1}
.page-nav a:hover{border-color:var(--primary);background:linear-gradient(135deg,rgba(99,102,241,.04),rgba(139,92,246,.04));box-shadow:0 2px 12px rgba(99,102,241,.1);transform:translateY(-1px);color:var(--text)}
.page-nav a .label{font-size:11px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;font-weight:500}
.page-nav a .title{font-size:14px;font-weight:600;margin-top:3px;color:var(--primary-dark)}
.page-nav .next{margin-left:auto;text-align:right}

/* ===== FAQ ===== */
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);margin:12px 0;overflow:hidden;transition:all .2s}
.faq-item:hover{border-color:var(--primary-light)}
.faq-q{padding:14px 18px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center}
.faq-q:hover{background:rgba(99,102,241,.02)}
.faq-q::after{content:'▸';transition:transform .2s;color:var(--text-muted)}
.faq-item.open .faq-q::after{transform:rotate(90deg)}
.faq-a{padding:0 18px;max-height:0;overflow:hidden;transition:max-height .3s,padding .3s}
.faq-item.open .faq-a{max-height:500px;padding:0 18px 16px}

/* ===== Lightbox ===== */
.lightbox{position:fixed;inset:0;background:rgba(0,0,0,.88);z-index:300;display:none;align-items:center;justify-content:center;opacity:0;transition:opacity .25s;cursor:zoom-out;backdrop-filter:blur(4px)}
.lightbox.show{opacity:1}
.lightbox img{max-width:92vw;max-height:90vh;border-radius:var(--radius-xs);box-shadow:0 4px 30px rgba(0,0,0,.5);object-fit:contain}
.lightbox-close{position:fixed;top:18px;right:24px;color:#fff;font-size:32px;cursor:pointer;z-index:301;background:none;border:none;line-height:1}

/* ===== Download Cards ===== */
.dl-section{margin:20px 0 32px}
.dl-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px}
.dl-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px 24px;text-align:center;transition:all .3s;position:relative;overflow:hidden}
.dl-card:hover{border-color:var(--primary-light);box-shadow:var(--shadow-lg);transform:translateY(-2px)}
.dl-card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--gradient-primary)}
.dl-icon{font-size:36px;margin-bottom:12px}
.dl-card h3{font-size:17px;font-weight:700;margin:8px 0}
.dl-desc{font-size:13px;color:var(--text-secondary);margin-bottom:12px}
.dl-link{margin:10px 0;word-break:break-all}
.dl-link a{font-size:13px;color:var(--primary);font-weight:500}
.qr-img{width:140px;height:140px;border-radius:var(--radius-sm);border:1px solid var(--border);margin:12px auto;display:block;box-shadow:var(--shadow-sm)}
.btn-group{display:flex;gap:8px;justify-content:center;margin-top:14px}
.btn-group .copy-btn,.btn-group .open-btn{padding:8px 18px;border-radius:var(--radius-xs);font-size:13px;font-weight:600;cursor:pointer;transition:all .2s;text-decoration:none;border:none}
.copy-btn{background:var(--gradient-primary);color:#fff}
.copy-btn:hover{opacity:.9;transform:translateY(-1px)}
.copy-btn:active{transform:scale(.97)}
.copy-btn.copied{background:var(--success)}
.open-btn{background:rgba(99,102,241,.06);color:var(--primary);border:1px solid var(--primary-light)!important}
.open-btn:hover{background:var(--primary);color:#fff}
.version-tag{display:inline-block;background:var(--gradient-primary);color:#fff;font-size:11px;font-weight:700;padding:2px 10px;border-radius:4px;margin-bottom:8px}
.version-tag.online{background:linear-gradient(135deg,#10b981,#059669)}
.version-tag.mobile{background:linear-gradient(135deg,#f59e0b,#d97706)}
.wechat-section{text-align:center;margin:48px 0 16px}
.wechat-section .qr-img{width:200px;height:200px}
.wechat-section p{color:var(--text-muted);font-size:14px;margin-top:8px}
.main-qr{text-align:center;margin:24px 0 40px}
.main-qr .qr-img{width:220px;height:220px;border:2px solid var(--primary-light);box-shadow:0 4px 16px rgba(99,102,241,.12)}
.main-qr .qr-url{font-size:15px;color:var(--primary);font-weight:600;margin-top:8px;word-break:break-all}
.main-qr p{color:var(--text-muted);font-size:13px;margin-top:4px}

/* ===== Footer ===== */
.footer{text-align:center;padding:36px 20px;color:var(--text-muted);font-size:13px;border-top:1px solid var(--border);background:var(--card)}

/* ===== Responsive ===== */
@media(max-width:768px){
  .hero{padding:56px 20px 48px}
  .hero h1{font-size:28px}
  .hero .subtitle{font-size:15px}
  .hero-buttons{flex-direction:column;align-items:center}
  .hero-btn{width:100%;max-width:280px;justify-content:center}
  .hero-stats{gap:24px;flex-wrap:wrap}
  .hero-stat .num{font-size:24px}
  .highlight-grid{grid-template-columns:repeat(2,1fr);gap:12px}
  .highlight-card{padding:20px 16px}
  .highlight-icon{width:44px;height:44px;font-size:22px}
  .page-hero{padding:36px 20px 28px}
  .page-hero h1{font-size:24px}
  .content{padding:28px 16px 100px}
  .card-grid{grid-template-columns:1fr}
  .cards-wrap{padding:0 16px 40px}
  .cards-wrap .section-header{margin:32px 0 16px}
  .screenshot-compare{flex-direction:column}
  .topbar{padding:0 16px}
  .mobile-cta{padding:48px 20px}
  .mobile-cta h2{font-size:24px}
  .page-nav{bottom:12px;width:calc(100% - 24px);padding:8px;border-radius:14px}
  .page-nav a{min-width:auto;padding:10px 12px;border-radius:10px}
  .page-nav a .title{font-size:13px}
  .dl-grid{grid-template-columns:1fr}
}
@media(max-width:480px){
  .highlight-grid{grid-template-columns:1fr}
  .hero-stats{flex-direction:column;gap:16px}
}