:root {
  --pri: #0d9488;
  --pri-dark: #0f766e;
  --pri-light: #5eead4;
  --accent: #f97316;
  --accent-light: #fdba74;
  --bg: #f8fafc;
  --bg-alt: #f1f5f9;
  --bg-dark: #0f172a;
  --bg-card: #fff;
  --text: #1e293b;
  --text-light: #64748b;
  --text-inv: #f1f5f9;
  --border: #e2e8f0;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 4px 12px rgba(0,0,0,.04);
  --shadow-lg: 0 4px 24px rgba(0,0,0,.1);
  --transition: .3s ease;
  --max-w: 1200px;
}
@keyframes spin { from{transform:rotate(0deg)} to{transform:rotate(360deg)} }
@keyframes fadeUp { from{opacity:0;transform:translateY(30px)} to{opacity:1;transform:translateY(0)} }
@keyframes slideIn { from{opacity:0;transform:translateX(-20px)} to{opacity:1;transform:translateX(0)} }
*, *::before, *::after { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior:smooth; }
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:1.7; -webkit-font-smoothing:antialiased; }
img { max-width:100%; display:block; }
a { color:var(--pri); text-decoration:none; transition:color var(--transition); }
a:hover { color:var(--pri-dark); }
button { cursor:pointer; border:none; font-family:inherit; }

.wrap { max-width:var(--max-w); margin:0 auto; padding:0 20px; }
.reveal { opacity:0; transform:translateY(24px); transition:opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity:1; transform:translateY(0); }

/* ===== NAVBAR ===== */
.topbar { position:sticky; top:0; z-index:100; background:rgba(255,255,255,.92); backdrop-filter:blur(12px); border-bottom:1px solid var(--border); }
.topbar .wrap { display:flex; align-items:center; justify-content:space-between; height:64px; }
.logo { display:flex; align-items:center; gap:10px; font-size:18px; font-weight:700; color:var(--text); }
.logo svg { width:32px; height:32px; }
.nav-links { display:flex; gap:4px; list-style:none; }
.nav-links a { display:flex; align-items:center; gap:6px; padding:8px 16px; border-radius:8px; font-size:15px; font-weight:500; color:var(--text-light); transition:all var(--transition); }
.nav-links a:hover { color:var(--pri); background:rgba(13,148,136,.06); }
.nav-links a.active { color:var(--pri); background:rgba(13,148,136,.1); font-weight:600; }
.nav-links a svg { width:18px; height:18px; flex-shrink:0; }
.mobile-toggle { display:none; width:40px; height:40px; border-radius:8px; background:transparent; align-items:center; justify-content:center; }
.mobile-toggle svg { width:24px; height:24px; }

/* ===== HERO ===== */
.hero { position:relative; background:linear-gradient(135deg,#0f172a 0%,#134e4a 50%,#0d9488 100%); padding:100px 0 80px; overflow:hidden; }
.hero::before { content:""; position:absolute; top:-50%; right:-30%; width:80%; height:200%; background:radial-gradient(circle,rgba(249,115,22,.15) 0%,transparent 60%); pointer-events:none; }
.hero .wrap { position:relative; z-index:2; display:flex; align-items:center; gap:60px; }
.hero-text { flex:1; }
.hero-text h1 { font-size:clamp(28px,4vw,48px); font-weight:800; color:#fff; line-height:1.25; margin-bottom:20px; }
.hero-text h1 span { color:var(--pri-light); }
.hero-text .lead { font-size:18px; color:rgba(255,255,255,.8); margin-bottom:32px; max-width:560px; }
.hero-actions { display:flex; gap:14px; flex-wrap:wrap; }
.hero-visual { flex:0 0 320px; display:flex; justify-content:center; }
.hero-visual svg { width:260px; height:260px; filter:drop-shadow(0 20px 40px rgba(0,0,0,.3)); }

/* ===== BUTTONS ===== */
.btn { display:inline-flex; align-items:center; gap:8px; padding:14px 28px; border-radius:10px; font-size:16px; font-weight:600; transition:all var(--transition); }
.btn svg { width:20px; height:20px; flex-shrink:0; }
.btn-primary { background:var(--accent); color:#fff; }
.btn-primary:hover { background:#ea580c; transform:translateY(-2px); box-shadow:0 8px 24px rgba(249,115,22,.35); color:#fff; }
.btn-outline { background:transparent; color:#fff; border:2px solid rgba(255,255,255,.4); }
.btn-outline:hover { border-color:#fff; background:rgba(255,255,255,.1); color:#fff; }
.btn-teal { background:var(--pri); color:#fff; }
.btn-teal:hover { background:var(--pri-dark); transform:translateY(-2px); box-shadow:0 8px 24px rgba(13,148,136,.3); color:#fff; }
.btn-sm { padding:10px 20px; font-size:14px; border-radius:8px; }
.btn-ghost { background:rgba(13,148,136,.08); color:var(--pri); }
.btn-ghost:hover { background:rgba(13,148,136,.15); color:var(--pri-dark); }

/* ===== SECTIONS ===== */
.section { padding:80px 0; }
.section-alt { background:var(--bg-alt); }
.section-dark { background:var(--bg-dark); color:var(--text-inv); }
.section-head { text-align:center; margin-bottom:56px; }
.section-head h2 { font-size:clamp(24px,3vw,36px); font-weight:800; margin-bottom:12px; }
.section-head p { font-size:17px; color:var(--text-light); max-width:640px; margin:0 auto; }
.section-dark .section-head p { color:rgba(255,255,255,.65); }
.badge { display:inline-block; padding:4px 14px; border-radius:20px; font-size:13px; font-weight:600; background:rgba(13,148,136,.1); color:var(--pri); margin-bottom:12px; }
.section-dark .badge { background:rgba(94,234,212,.15); color:var(--pri-light); }

/* ===== FEATURE GRID ===== */
.feat-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.feat-card { background:var(--bg-card); border-radius:var(--radius); padding:32px 28px; border:1px solid var(--border); transition:all var(--transition); }
.feat-card:hover { transform:translateY(-4px); box-shadow:var(--shadow-lg); border-color:var(--pri-light); }
.feat-icon { width:52px; height:52px; border-radius:12px; display:flex; align-items:center; justify-content:center; margin-bottom:18px; }
.feat-icon svg { width:28px; height:28px; }
.feat-icon.teal { background:rgba(13,148,136,.1); color:var(--pri); }
.feat-icon.orange { background:rgba(249,115,22,.1); color:var(--accent); }
.feat-icon.blue { background:rgba(59,130,246,.1); color:#3b82f6; }
.feat-icon.purple { background:rgba(139,92,246,.1); color:#8b5cf6; }
.feat-icon.rose { background:rgba(244,63,94,.1); color:#f43f5e; }
.feat-icon.emerald { background:rgba(16,185,129,.1); color:#10b981; }
.feat-card h3 { font-size:18px; font-weight:700; margin-bottom:8px; }
.feat-card p { font-size:15px; color:var(--text-light); }

/* ===== PLATFORM CARDS ===== */
.plat-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:20px; }
.plat-card { background:var(--bg-card); border-radius:var(--radius); padding:28px 24px; text-align:center; border:1px solid var(--border); transition:all var(--transition); }
.plat-card:hover { transform:translateY(-4px); box-shadow:var(--shadow-lg); }
.plat-card svg { width:48px; height:48px; margin:0 auto 14px; }
.plat-card h3 { font-size:17px; font-weight:700; margin-bottom:6px; }
.plat-card .plat-desc { font-size:14px; color:var(--text-light); margin-bottom:16px; }
.plat-card .btn { width:100%; justify-content:center; }

/* ===== DETAIL BLOCKS ===== */
.detail-block { display:flex; align-items:center; gap:48px; margin-bottom:64px; }
.detail-block:nth-child(even) { flex-direction:row-reverse; }
.detail-block:last-child { margin-bottom:0; }
.detail-img { flex:0 0 360px; }
.detail-img svg { width:100%; height:auto; }
.detail-body { flex:1; }
.detail-body h3 { font-size:24px; font-weight:700; margin-bottom:12px; }
.detail-body p { font-size:16px; color:var(--text-light); margin-bottom:14px; }
.detail-body ul { list-style:none; }
.detail-body ul li { position:relative; padding-left:24px; margin-bottom:8px; font-size:15px; color:var(--text-light); }
.detail-body ul li::before { content:""; position:absolute; left:0; top:9px; width:8px; height:8px; border-radius:50%; background:var(--pri); }

/* ===== REVIEWS ===== */
.review-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.review-card { background:var(--bg-card); border-radius:var(--radius); padding:28px; border:1px solid var(--border); }
.review-top { display:flex; align-items:center; gap:14px; margin-bottom:14px; }
.review-avatar { width:44px; height:44px; border-radius:50%; background:linear-gradient(135deg,var(--pri),var(--pri-light)); display:flex; align-items:center; justify-content:center; color:#fff; font-weight:700; font-size:18px; flex-shrink:0; }
.review-name { font-weight:600; font-size:15px; }
.review-stars { display:flex; gap:2px; margin-top:2px; }
.review-stars svg { width:16px; height:16px; fill:var(--accent); }
.review-card p { font-size:15px; color:var(--text-light); line-height:1.7; }

/* ===== STATS ===== */
.stat-row { display:grid; grid-template-columns:repeat(4,1fr); gap:24px; }
.stat-item { text-align:center; padding:24px; }
.stat-num { font-size:clamp(32px,4vw,48px); font-weight:800; color:var(--pri-light); margin-bottom:4px; }
.stat-label { font-size:15px; color:rgba(255,255,255,.6); }

/* ===== COMPARE TABLE ===== */
.compare-wrap { overflow-x:auto; }
.compare-table { width:100%; border-collapse:collapse; background:var(--bg-card); border-radius:var(--radius); overflow:hidden; border:1px solid var(--border); }
.compare-table th, .compare-table td { padding:14px 20px; text-align:left; font-size:15px; border-bottom:1px solid var(--border); }
.compare-table thead th { background:var(--pri); color:#fff; font-weight:600; }
.compare-table tbody tr:last-child td { border-bottom:none; }
.compare-table tbody tr:hover { background:rgba(13,148,136,.03); }
.check { color:var(--pri); font-weight:700; }
.cross { color:#94a3b8; }

/* ===== FAQ ===== */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item { border:1px solid var(--border); border-radius:var(--radius); margin-bottom:12px; overflow:hidden; background:var(--bg-card); transition:box-shadow var(--transition); }
.faq-item:hover { box-shadow:var(--shadow); }
.faq-q { display:flex; align-items:center; justify-content:space-between; padding:18px 24px; cursor:pointer; font-weight:600; font-size:16px; user-select:none; }
.faq-q svg { width:20px; height:20px; color:var(--text-light); transition:transform var(--transition); flex-shrink:0; }
.faq-item.open .faq-q svg { transform:rotate(180deg); color:var(--pri); }
.faq-a { max-height:0; overflow:hidden; transition:max-height .4s ease, padding .3s ease; }
.faq-item.open .faq-a { max-height:600px; padding:0 24px 20px; }
.faq-a p { font-size:15px; color:var(--text-light); line-height:1.8; }

/* ===== TABS ===== */
.tab-group .tab-nav { display:flex; gap:4px; margin-bottom:24px; border-bottom:2px solid var(--border); padding-bottom:0; }
.tab-btn { padding:12px 24px; font-size:15px; font-weight:600; background:none; color:var(--text-light); border-bottom:2px solid transparent; margin-bottom:-2px; transition:all var(--transition); }
.tab-btn.active { color:var(--pri); border-bottom-color:var(--pri); }
.tab-btn:hover { color:var(--pri); }
.tab-panel { display:none; }
.tab-panel.active { display:block; animation:fadeUp .4s ease; }

/* ===== INSTALL STEPS ===== */
.steps { counter-reset:step; }
.step-item { display:flex; gap:20px; margin-bottom:28px; align-items:flex-start; }
.step-num { counter-increment:step; flex-shrink:0; width:44px; height:44px; border-radius:50%; background:var(--pri); color:#fff; display:flex; align-items:center; justify-content:center; font-weight:700; font-size:18px; }
.step-body h4 { font-size:17px; font-weight:700; margin-bottom:4px; }
.step-body p { font-size:15px; color:var(--text-light); }

/* ===== VERSION LOG ===== */
.ver-list { max-width:700px; margin:0 auto; }
.ver-item { border-left:3px solid var(--pri); padding:0 0 28px 24px; position:relative; }
.ver-item::before { content:""; position:absolute; left:-7px; top:4px; width:12px; height:12px; border-radius:50%; background:var(--pri); border:3px solid var(--bg); }
.ver-item:last-child { padding-bottom:0; }
.ver-head { display:flex; align-items:center; gap:12px; margin-bottom:6px; }
.ver-tag { font-weight:700; font-size:16px; color:var(--pri); }
.ver-date { font-size:13px; color:var(--text-light); }
.ver-item ul { list-style:disc inside; font-size:15px; color:var(--text-light); }
.ver-item ul li { margin-bottom:2px; }

/* ===== DOWNLOAD HERO ===== */
.dl-hero { background:linear-gradient(135deg,#0f172a,#134e4a); padding:80px 0 60px; text-align:center; color:#fff; }
.dl-hero h1 { font-size:clamp(26px,3.5vw,42px); font-weight:800; margin-bottom:14px; }
.dl-hero .lead { font-size:17px; color:rgba(255,255,255,.75); max-width:600px; margin:0 auto 28px; }
.dl-main-card { display:inline-flex; flex-direction:column; align-items:center; background:rgba(255,255,255,.08); border:1px solid rgba(255,255,255,.15); border-radius:16px; padding:32px 48px; gap:12px; }
.dl-main-card .ver-info { font-size:14px; color:rgba(255,255,255,.55); }

/* ===== SECURITY BADGE ===== */
.security-bar { background:linear-gradient(90deg,rgba(13,148,136,.08),rgba(16,185,129,.08)); border:1px solid rgba(13,148,136,.2); border-radius:var(--radius); padding:24px 32px; display:flex; align-items:center; gap:16px; }
.security-bar svg { width:40px; height:40px; color:var(--pri); flex-shrink:0; }
.security-bar h4 { font-size:16px; font-weight:700; margin-bottom:2px; }
.security-bar p { font-size:14px; color:var(--text-light); }

/* ===== CTA BANNER ===== */
.cta-banner { background:linear-gradient(135deg,var(--pri),#0f766e); border-radius:16px; padding:48px; text-align:center; color:#fff; }
.cta-banner h2 { font-size:28px; font-weight:800; margin-bottom:10px; }
.cta-banner p { font-size:16px; color:rgba(255,255,255,.8); margin-bottom:24px; max-width:500px; margin-left:auto; margin-right:auto; }
.cta-banner .btn { background:var(--accent); color:#fff; }
.cta-banner .btn:hover { background:#ea580c; color:#fff; }

/* ===== FOOTER ===== */
.site-footer { background:var(--bg-dark); color:rgba(255,255,255,.55); padding:40px 0; text-align:center; font-size:14px; line-height:1.8; }
.site-footer .secure { color:var(--pri-light); font-weight:600; margin-bottom:6px; }

/* ===== TIPS GRID ===== */
.tip-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:24px; }
.tip-card { background:var(--bg-card); border-radius:var(--radius); padding:28px; border:1px solid var(--border); }
.tip-card h3 { font-size:17px; font-weight:700; margin-bottom:8px; display:flex; align-items:center; gap:8px; }
.tip-card h3 svg { width:22px; height:22px; color:var(--pri); }
.tip-card p { font-size:15px; color:var(--text-light); }

/* ===== SYS REQ TABLE ===== */
.req-table { width:100%; border-collapse:collapse; background:var(--bg-card); border-radius:var(--radius); overflow:hidden; border:1px solid var(--border); }
.req-table th, .req-table td { padding:12px 18px; text-align:left; font-size:14px; border-bottom:1px solid var(--border); }
.req-table thead th { background:var(--bg-alt); font-weight:600; color:var(--text); }
.req-table tbody tr:last-child td { border-bottom:none; }

/* ===== ARTICLE STYLE (zh-cn) ===== */
.article-content { max-width:800px; margin:0 auto; }
.article-content h2 { font-size:24px; font-weight:800; margin:40px 0 16px; padding-bottom:10px; border-bottom:2px solid var(--border); }
.article-content h3 { font-size:20px; font-weight:700; margin:28px 0 12px; }
.article-content p { font-size:16px; color:var(--text-light); margin-bottom:16px; line-height:1.9; }
.article-content ul, .article-content ol { margin:0 0 16px 24px; }
.article-content li { font-size:15px; color:var(--text-light); margin-bottom:6px; line-height:1.8; }
.article-content blockquote { border-left:4px solid var(--pri); padding:12px 20px; margin:20px 0; background:rgba(13,148,136,.04); border-radius:0 8px 8px 0; }
.article-content blockquote p { color:var(--text); font-weight:500; margin-bottom:0; }
.article-hero { background:linear-gradient(135deg,#0f172a,#134e4a 70%,#0d9488); padding:70px 0 50px; text-align:center; color:#fff; }
.article-hero h1 { font-size:clamp(24px,3vw,38px); font-weight:800; margin-bottom:12px; }
.article-hero .lead { color:rgba(255,255,255,.7); font-size:16px; max-width:580px; margin:0 auto; }

/* ===== RESPONSIVE ===== */
@media(max-width:1024px) {
  .feat-grid, .review-grid { grid-template-columns:repeat(2,1fr); }
  .plat-grid { grid-template-columns:repeat(2,1fr); }
  .stat-row { grid-template-columns:repeat(2,1fr); }
  .detail-block, .detail-block:nth-child(even) { flex-direction:column; }
  .detail-img { flex:none; width:100%; max-width:360px; margin:0 auto; }
}
@media(max-width:768px) {
  .mobile-toggle { display:flex; }
  .nav-links { display:none; position:absolute; top:64px; left:0; right:0; flex-direction:column; background:#fff; border-bottom:1px solid var(--border); padding:12px 20px; box-shadow:var(--shadow-lg); }
  .nav-links.show { display:flex; }
  .topbar .wrap { position:relative; }
  .hero .wrap { flex-direction:column; text-align:center; }
  .hero-text .lead { margin-left:auto; margin-right:auto; }
  .hero-actions { justify-content:center; }
  .hero-visual { flex:none; }
  .feat-grid, .review-grid, .tip-grid { grid-template-columns:1fr; }
  .plat-grid { grid-template-columns:1fr; }
  .stat-row { grid-template-columns:1fr 1fr; }
  .dl-main-card { padding:24px; }
  .section { padding:56px 0; }
  .cta-banner { padding:32px 20px; }
  .security-bar { flex-direction:column; text-align:center; }
}
@media(max-width:480px) {
  .stat-row { grid-template-columns:1fr; }
  .tab-nav { flex-wrap:wrap; }
}