:root{--teal:#0f766e;--teal2:#0d9488;--coral:#f43f5e;--dark:#0f172a;--gray:#64748b;--light:#f8fafc;--white:#ffffff;--border:#e2e8f0;}
*{box-sizing:border-box;margin:0;padding:0;}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;color:var(--dark);background:var(--white);line-height:1.6;}
a{text-decoration:none;color:inherit;}
@keyframes spin{from{transform:rotate(0deg)}to{transform:rotate(360deg)}}
@keyframes fadeUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
.nav{position:sticky;top:0;z-index:100;background:var(--white);border-bottom:1px solid var(--border);box-shadow:0 1px 8px rgba(0,0,0,.06);}
.nav-inner{max-width:1200px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;height:60px;}
.nav-logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.1rem;color:var(--dark);}
.nav-links{display:flex;align-items:center;gap:6px;}
.nav-links a{padding:6px 16px;border-radius:20px;font-size:.9rem;color:var(--gray);transition:all .2s;}
.nav-links a:hover{background:var(--light);color:var(--dark);}
.nav-links a.active{background:var(--teal);color:#fff;font-weight:600;}
.nav-dl{background:var(--coral)!important;color:#fff!important;font-weight:600;}
.nav-dl:hover{background:#e11d48!important;}
.hero{background:linear-gradient(135deg,var(--dark) 0%,#1e3a5f 50%,#0f4c4c 100%);color:#fff;padding:80px 24px 60px;}
.hero-inner{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;}
.hero-badge{display:inline-block;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);padding:4px 14px;border-radius:20px;font-size:.8rem;margin-bottom:20px;}
.hero h1{font-size:2.6rem;font-weight:800;line-height:1.2;margin-bottom:16px;}
.hero h1 span{color:#5eead4;}
.hero-sub{font-size:1rem;color:rgba(255,255,255,.75);margin-bottom:32px;line-height:1.7;}
.hero-btns{display:flex;gap:12px;flex-wrap:wrap;}
.btn-primary{background:var(--teal2);color:#fff;border:none;padding:14px 28px;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:background .2s;display:inline-flex;align-items:center;gap:8px;}
.btn-primary:hover{background:var(--teal);}
.btn-outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.4);padding:12px 24px;border-radius:8px;font-size:1rem;cursor:pointer;transition:all .2s;}
.btn-outline:hover{border-color:#fff;}
.bm{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.15);border-radius:12px;overflow:hidden;animation:fadeUp .8s ease;}
.bm-bar{background:rgba(255,255,255,.1);padding:10px 16px;display:flex;align-items:center;gap:8px;}
.bm-dots{display:flex;gap:5px;}
.bm-dot{width:10px;height:10px;border-radius:50%;}
.bm-dot.r{background:#f43f5e;}.bm-dot.y{background:#fbbf24;}.bm-dot.g{background:#22c55e;}
.bm-addr{flex:1;background:rgba(255,255,255,.12);border-radius:4px;padding:5px 12px;font-size:.8rem;color:rgba(255,255,255,.6);}
.bm-body{padding:20px;}
.bm-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:16px;}
.bm-m{background:rgba(255,255,255,.08);border-radius:8px;padding:12px;text-align:center;}
.bm-m .v{font-size:1.3rem;font-weight:700;color:#5eead4;}
.bm-m .l{font-size:.7rem;color:rgba(255,255,255,.6);}
.stats-strip{background:var(--teal);color:#fff;padding:28px 24px;}
.stats-inner{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center;}
.stat-item .num{font-size:2rem;font-weight:800;}
.stat-item .lbl{font-size:.85rem;opacity:.85;margin-top:4px;}
.section{padding:72px 24px;}
.section-inner{max-width:1200px;margin:0 auto;}
.section-header{text-align:center;margin-bottom:48px;}
.section-tag{display:inline-block;background:#e0fdf4;color:var(--teal);font-size:.8rem;font-weight:600;padding:4px 12px;border-radius:20px;margin-bottom:12px;}
.section-title{font-size:2rem;font-weight:700;margin-bottom:12px;}
.section-sub{font-size:1rem;color:var(--gray);max-width:560px;margin:0 auto;}
.bg-light{background:var(--light);}
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.feat-card{background:#fff;border:1px solid var(--border);border-radius:12px;padding:28px 24px;transition:box-shadow .2s,transform .2s;}
.feat-card:hover{box-shadow:0 8px 24px rgba(15,118,110,.12);transform:translateY(-3px);}
.feat-icon{width:48px;height:48px;background:linear-gradient(135deg,#ccfbf1,#a7f3d0);border-radius:10px;display:flex;align-items:center;justify-content:center;margin-bottom:16px;}
.feat-icon svg{width:24px;height:24px;color:var(--teal);}
.feat-card h3{font-size:1.05rem;font-weight:700;margin-bottom:8px;}
.feat-card p{font-size:.9rem;color:var(--gray);line-height:1.7;}
.showcase-row{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;padding:40px 0;border-top:1px solid var(--border);}
.showcase-row:first-child{border-top:none;}
.showcase-row.rev .sc-vis{order:-1;}
.sc-tag{display:inline-block;background:#e0fdf4;color:var(--teal);font-size:.75rem;font-weight:600;padding:3px 10px;border-radius:20px;margin-bottom:12px;}
.sc-text h3{font-size:1.4rem;font-weight:700;margin-bottom:12px;}
.sc-text p{color:var(--gray);line-height:1.8;margin-bottom:14px;font-size:.95rem;}
.sc-list{list-style:none;display:flex;flex-direction:column;gap:8px;}
.sc-list li{display:flex;align-items:flex-start;gap:8px;font-size:.9rem;}
.sc-list li svg{width:16px;height:16px;color:var(--teal);flex-shrink:0;margin-top:2px;}
.sc-vis{background:linear-gradient(135deg,#0f172a,#0f4c4c);border-radius:16px;padding:28px;min-height:240px;display:flex;align-items:center;justify-content:center;}
.sc-panel{width:100%;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:10px;overflow:hidden;}
.sc-ph{background:rgba(255,255,255,.08);padding:8px 14px;font-size:.78rem;color:rgba(255,255,255,.7);}
.sc-pb{padding:14px;}
.bar-row{display:flex;align-items:center;gap:8px;margin-bottom:8px;}
.bar-lbl{font-size:.72rem;color:rgba(255,255,255,.6);width:56px;}
.bar-track{flex:1;background:rgba(255,255,255,.1);border-radius:4px;height:7px;}
.bar-fill{height:7px;border-radius:4px;background:linear-gradient(90deg,#0d9488,#5eead4);}
.bar-val{font-size:.72rem;color:#5eead4;width:32px;text-align:right;}
.platform-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.plat-card{border:1px solid var(--border);border-radius:12px;padding:24px 20px;text-align:center;transition:box-shadow .2s;}
.plat-card:hover{box-shadow:0 6px 20px rgba(0,0,0,.08);}
.plat-card.featured{background:var(--dark);color:#fff;border-color:var(--dark);}
.plat-icon{width:52px;height:52px;margin:0 auto 14px;display:flex;align-items:center;justify-content:center;}
.plat-card h3{font-size:1rem;font-weight:700;margin-bottom:6px;}
.plat-card p{font-size:.82rem;color:var(--gray);margin-bottom:16px;}
.plat-card.featured p{color:rgba(255,255,255,.65);}
.plat-btn{width:100%;border:none;border-radius:7px;padding:10px;font-size:.88rem;font-weight:600;cursor:pointer;transition:background .2s;}
.plat-btn.win-btn{background:var(--teal2);color:#fff;}
.plat-btn.win-btn:hover{background:var(--teal);}
.plat-btn.mac-btn{background:var(--light);color:var(--dark);border:1px solid var(--border);}
.plat-btn.ios-btn{background:#007aff;color:#fff;}
.plat-btn.and-btn{background:#22c55e;color:#fff;}
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.rev-card{background:#fff;border:1px solid var(--border);border-radius:12px;padding:24px;border-left:4px solid var(--teal);}
.rev-stars{color:#fbbf24;font-size:1rem;margin-bottom:8px;}
.rev-text{font-size:.9rem;color:var(--gray);line-height:1.7;margin-bottom:14px;}
.rev-author{font-size:.85rem;font-weight:600;}
.compare-table{width:100%;border-collapse:collapse;font-size:.9rem;}
.compare-table th,.compare-table td{padding:12px 16px;text-align:center;border:1px solid var(--border);}
.compare-table th{background:var(--teal);color:#fff;font-weight:600;}
.compare-table th:first-child,.compare-table td:first-child{text-align:left;font-weight:600;}
.compare-table tr:nth-child(even){background:var(--light);}
.compare-table .yes{color:#16a34a;font-weight:700;}
.compare-table .no{color:#dc2626;}
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{border:1px solid var(--border);border-radius:10px;overflow:hidden;}
.faq-q{width:100%;background:#fff;border:none;padding:18px 20px;text-align:left;font-size:.95rem;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background .2s;}
.faq-q:hover{background:var(--light);}
.faq-q.open{background:#e0fdf4;color:var(--teal);}
.faq-a{display:none;padding:0 20px 18px;font-size:.9rem;color:var(--gray);line-height:1.8;}
.faq-a.open{display:block;}
.cta-banner{background:linear-gradient(135deg,var(--dark),#1e3a5f);color:#fff;padding:64px 24px;text-align:center;}
.cta-banner h2{font-size:2rem;font-weight:800;margin-bottom:12px;}
.cta-banner p{font-size:1rem;opacity:.8;margin-bottom:32px;}
.footer{background:#0f172a;color:rgba(255,255,255,.6);padding:32px 24px;text-align:center;font-size:.85rem;line-height:1.8;}
.footer a{color:rgba(255,255,255,.6);}
/* Download page */
.dl-hero{background:linear-gradient(135deg,#0f172a,#1e3a5f);color:#fff;padding:60px 24px;}
.dl-hero-inner{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;}
.dl-hero h1{font-size:2rem;font-weight:800;margin-bottom:12px;}
.dl-hero p{color:rgba(255,255,255,.75);margin-bottom:24px;line-height:1.7;}
.win-card{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);border-radius:12px;padding:28px;}
.win-card h3{font-size:1.1rem;font-weight:700;margin-bottom:16px;display:flex;align-items:center;gap:8px;}
.win-specs{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:20px;}
.win-spec{background:rgba(255,255,255,.06);border-radius:6px;padding:10px 14px;}
.win-spec .sk{font-size:.72rem;color:rgba(255,255,255,.5);}
.win-spec .sv{font-size:.9rem;font-weight:600;margin-top:2px;}
.plat-section{padding:56px 24px;background:var(--light);}
.plat-cards3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;max-width:1200px;margin:0 auto;}
.plat3-card{background:#fff;border:1px solid var(--border);border-radius:12px;padding:28px 24px;}
.plat3-card h3{font-size:1rem;font-weight:700;margin-bottom:8px;}
.plat3-card p{font-size:.85rem;color:var(--gray);margin-bottom:12px;line-height:1.6;}
.install-section{padding:56px 24px;}
.install-inner{max-width:900px;margin:0 auto;}
.steps{display:flex;flex-direction:column;gap:0;}
.step{display:flex;gap:20px;padding:24px 0;border-bottom:1px solid var(--border);}
.step:last-child{border-bottom:none;}
.step-num{width:40px;height:40px;background:var(--teal);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1rem;flex-shrink:0;}
.step-content h4{font-size:1rem;font-weight:700;margin-bottom:6px;}
.step-content p{font-size:.9rem;color:var(--gray);line-height:1.7;}
.req-table{width:100%;border-collapse:collapse;font-size:.9rem;}
.req-table th,.req-table td{padding:10px 16px;border:1px solid var(--border);text-align:left;}
.req-table th{background:var(--teal);color:#fff;font-weight:600;}
.req-table tr:nth-child(even){background:var(--light);}
.version-list{display:flex;flex-direction:column;gap:16px;}
.ver-item{background:#fff;border:1px solid var(--border);border-radius:10px;padding:20px 24px;display:flex;gap:20px;align-items:flex-start;}
.ver-badge{background:var(--teal);color:#fff;padding:4px 12px;border-radius:6px;font-size:.8rem;font-weight:700;white-space:nowrap;}
.ver-content h4{font-size:.95rem;font-weight:700;margin-bottom:6px;}
.ver-content p{font-size:.88rem;color:var(--gray);line-height:1.6;}
.security-banner{background:#e0fdf4;border:1px solid #99f6e4;border-radius:12px;padding:28px;display:flex;gap:16px;align-items:flex-start;max-width:900px;margin:0 auto;}
.security-banner svg{width:28px;height:28px;color:var(--teal);flex-shrink:0;}
.security-banner h3{font-size:1rem;font-weight:700;margin-bottom:6px;}
.security-banner p{font-size:.88rem;color:var(--gray);line-height:1.7;}
/* Article / zh-cn */
.article-hero{background:linear-gradient(135deg,#0f172a,#0f4c4c);color:#fff;padding:56px 24px;}
.article-hero-inner{max-width:1200px;margin:0 auto;}
.breadcrumb{font-size:.82rem;color:rgba(255,255,255,.6);margin-bottom:16px;}
.breadcrumb a{color:rgba(255,255,255,.6);}
.article-hero h1{font-size:2rem;font-weight:800;margin-bottom:10px;}
.article-hero p{color:rgba(255,255,255,.75);font-size:.95rem;}
.article-layout{max-width:1200px;margin:0 auto;padding:48px 24px;display:grid;grid-template-columns:1fr 300px;gap:48px;align-items:start;}
.article-body h2{font-size:1.5rem;font-weight:700;margin:32px 0 14px;padding-bottom:8px;border-bottom:2px solid var(--teal);}
.article-body h3{font-size:1.15rem;font-weight:700;margin:24px 0 10px;}
.article-body p{font-size:.95rem;color:#374151;line-height:1.85;margin-bottom:14px;}
.article-body ul{padding-left:20px;margin-bottom:14px;}
.article-body li{font-size:.93rem;color:#374151;line-height:1.8;margin-bottom:6px;}
.art-table{width:100%;border-collapse:collapse;margin:20px 0;font-size:.88rem;}
.art-table th,.art-table td{padding:10px 14px;border:1px solid var(--border);text-align:center;}
.art-table th{background:var(--teal);color:#fff;font-weight:600;}
.art-table td:first-child{font-weight:600;text-align:left;}
.art-table tr:nth-child(even){background:var(--light);}
.art-table .yes{color:#16a34a;font-weight:700;}
.art-table .no{color:#dc2626;}
.sidebar{position:sticky;top:76px;}
.toc-box{background:#fff;border:1px solid var(--border);border-radius:12px;padding:20px;margin-bottom:20px;}
.toc-box h4{font-size:.9rem;font-weight:700;margin-bottom:12px;color:var(--teal);}
.toc-box a{display:block;font-size:.82rem;color:var(--gray);padding:5px 0;border-bottom:1px solid var(--border);transition:color .2s;}
.toc-box a:last-child{border-bottom:none;}
.toc-box a:hover,.toc-box a.active{color:var(--teal);font-weight:600;}
.dl-side-card{background:var(--teal);color:#fff;border-radius:12px;padding:20px;text-align:center;}
.dl-side-card h4{font-size:1rem;font-weight:700;margin-bottom:8px;}
.dl-side-card p{font-size:.82rem;opacity:.85;margin-bottom:16px;}
.art-cta{background:linear-gradient(135deg,var(--teal),var(--teal2));color:#fff;border-radius:12px;padding:32px;text-align:center;margin:32px 0;}
.art-cta h3{font-size:1.3rem;font-weight:700;margin-bottom:8px;}
.art-cta p{font-size:.9rem;opacity:.85;margin-bottom:20px;}
.art-cta a{display:inline-block;background:#fff;color:var(--teal);font-weight:700;padding:12px 28px;border-radius:8px;font-size:.95rem;transition:opacity .2s;}
.art-cta a:hover{opacity:.9;}
.tips-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin:16px 0;}
.tip-item{background:var(--light);border-radius:8px;padding:16px;}
.tip-item h4{font-size:.9rem;font-weight:700;margin-bottom:6px;color:var(--teal);}
.tip-item p{font-size:.85rem;color:var(--gray);line-height:1.6;}
@media(max-width:900px){
.hero-inner,.dl-hero-inner,.showcase-row{grid-template-columns:1fr;}
.showcase-row.rev .sc-vis{order:0;}
.feat-grid{grid-template-columns:repeat(2,1fr);}
.platform-grid,.plat-cards3{grid-template-columns:repeat(2,1fr);}
.stats-inner{grid-template-columns:repeat(2,1fr);}
.reviews-grid{grid-template-columns:1fr;}
.article-layout{grid-template-columns:1fr;}
.sidebar{display:none;}
}
@media(max-width:600px){
.feat-grid,.platform-grid,.plat-cards3,.stats-inner{grid-template-columns:1fr;}
.hero h1{font-size:1.8rem;}
.nav-links{gap:2px;}
.nav-links a{padding:5px 10px;font-size:.8rem;}
}