/* EHViewer ehviewerpro - 极简暗紫专业风 */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0a0a0f;--surface:#12121a;--card:#1a1a24;--border:#2a2a38;
  --purple:#7c3aed;--purple-light:#a78bfa;--text:#e2e2e8;--muted:#8888a0;
  --font:"SF Mono",Consolas,"PingFang SC","Microsoft YaHei",monospace,sans-serif;
}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.65;min-height:100vh}
a{color:var(--purple-light);text-decoration:none}
img{max-width:100%;height:auto;display:block}
.box{max-width:960px;margin:0 auto;padding:0 20px}

/* 极简顶栏 */
.bar-top{border-bottom:1px solid var(--border);padding:16px 0;background:var(--surface);position:sticky;top:0;z-index:100}
.bar-top .box{display:flex;align-items:center;justify-content:space-between}
.mark{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1rem;letter-spacing:.05em;color:var(--text)}
.mark img{width:36px;height:36px;border-radius:8px}
.tabs{display:flex;gap:20px}
.tabs a{color:var(--muted);font-size:.82rem;letter-spacing:.02em;transition:color .2s}
.tabs a:hover{color:var(--purple-light)}

/* 主视觉 - 极简居中 */
.hero-min{padding:64px 0 56px;text-align:center}
.hero-min .tag{display:inline-block;border:1px solid var(--purple);color:var(--purple-light);padding:4px 12px;border-radius:4px;font-size:.75rem;margin-bottom:20px;letter-spacing:.1em}
.hero-min h1{font-size:clamp(1.6rem,4.5vw,2.4rem);font-weight:700;margin-bottom:14px;letter-spacing:-.02em}
.hero-min h1 code{color:var(--purple-light);background:var(--card);padding:2px 8px;border-radius:4px;font-size:.9em}
.hero-min .desc{color:var(--muted);font-size:.95rem;max-width:520px;margin:0 auto 32px;line-height:1.7}
.action-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:48px}
.act-btn{padding:13px 28px;border-radius:6px;font-weight:600;font-size:.9rem;border:1px solid var(--border);cursor:pointer;transition:all .2s;letter-spacing:.03em}
.act-btn:active{transform:scale(.97)}
.act-android{background:var(--purple);border-color:var(--purple);color:#fff}
.act-android:hover{background:#6d28d9}
.act-ios{background:transparent;color:var(--text)}
.act-ios:hover{border-color:var(--purple-light)}
.act-sm{padding:10px 18px;font-size:.82rem}
.preview-row{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.preview-row img{border-radius:8px;max-width:170px;border:1px solid var(--border)}

/* 功能列表 - 表格式 */
.specs{padding:56px 0;border-top:1px solid var(--border)}
.specs h2{font-size:1rem;text-transform:uppercase;letter-spacing:.15em;color:var(--muted);margin-bottom:24px;text-align:center}
.spec-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1px;background:var(--border);border:1px solid var(--border);border-radius:8px;overflow:hidden}
.spec-item{background:var(--card);padding:20px}
.spec-item dt{color:var(--purple-light);font-size:.8rem;margin-bottom:6px;font-weight:600}
.spec-item dd{color:var(--muted);font-size:.85rem}

/* 截图 */
.frame{padding:56px 0}
.frame h2{font-size:1rem;text-align:center;color:var(--muted);letter-spacing:.1em;margin-bottom:28px}
.frame-imgs{display:flex;gap:14px;justify-content:center;overflow-x:auto;padding-bottom:8px}
.frame-imgs img{border-radius:6px;max-width:180px;flex-shrink:0}

/* 内页 */
.page-top{padding:48px 0 36px;text-align:center;border-bottom:1px solid var(--border)}
.page-top h1{font-size:clamp(1.3rem,3.5vw,1.8rem);margin-bottom:8px}
.page-top p{color:var(--muted);font-size:.9rem}
.doc{padding:40px 0;max-width:720px;margin:0 auto}
.doc h2{font-size:.95rem;color:var(--purple-light);margin:24px 0 10px;font-weight:600}
.doc p,.doc li{color:var(--muted);font-size:.88rem;margin-bottom:10px}
.doc ul,.doc ol{padding-left:18px;margin-bottom:14px}

/* 底部 */
.base-foot{border-top:1px solid var(--border);padding:36px 0 96px;text-align:center;margin-top:40px}
.alert-box{border-left:3px solid #ef4444;background:rgba(239,68,68,.08);padding:14px 18px;margin-bottom:24px;text-align:left;color:#fca5a5;font-size:.82rem;line-height:1.7;font-weight:500}
.foot-links{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:18px}
.foot-links a{color:var(--muted);font-size:.8rem}
.foot-links a:hover{color:var(--purple-light)}
#download-stats{font-size:.82rem;color:var(--muted);margin-bottom:8px}
#download-stats strong{color:var(--purple-light)}
.mini-copy{font-size:.72rem;color:#444}

/* 悬浮 - 细条 */
.fix-dl{position:fixed;bottom:0;left:0;right:0;background:var(--surface);border-top:1px solid var(--purple);padding:8px 16px;display:flex;align-items:center;justify-content:center;gap:10px;z-index:999;transform:translateY(100%);transition:transform .25s}
.fix-dl.on{transform:translateY(0)}
.fix-dl .hint{color:var(--muted);font-size:.78rem;display:none}

@media(min-width:480px){.fix-dl .hint{display:inline}}

/* 首页扩展 */
.hero-stats{display:flex;justify-content:center;gap:32px;flex-wrap:wrap;margin:28px 0 36px;padding:20px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.hero-stats div{text-align:center}
.hero-stats b{display:block;font-size:1.4rem;color:var(--purple-light);font-weight:700}
.hero-stats small{font-size:.72rem;color:var(--muted);letter-spacing:.05em}
.about-split{display:grid;grid-template-columns:1fr 1fr;gap:36px;padding:56px 0;border-top:1px solid var(--border)}
.about-split p{color:var(--muted);font-size:.88rem;line-height:1.85;margin-bottom:12px}
.about-split ul{color:var(--muted);font-size:.85rem;padding-left:18px;margin-bottom:12px}
.about-split li{margin-bottom:6px}
.meta-table{width:100%;border:1px solid var(--border);border-radius:8px;overflow:hidden}
.meta-table th,.meta-table td{padding:12px 16px;font-size:.82rem;text-align:left;border-bottom:1px solid var(--border)}
.meta-table th{background:var(--card);color:var(--muted);font-weight:600;width:38%}
.meta-table td{background:var(--surface)}
.meta-table tr:last-child th,.meta-table tr:last-child td{border-bottom:none}
.cmd-block{background:var(--card);border:1px solid var(--border);border-radius:8px;padding:16px 20px;margin-top:16px;font-size:.82rem;color:var(--purple-light);overflow-x:auto}
.feature-deep{padding:56px 0;border-top:1px solid var(--border)}
.feature-deep h2{font-size:.85rem;text-transform:uppercase;letter-spacing:.12em;color:var(--muted);text-align:center;margin-bottom:28px}
.feat-cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}
.feat-col{background:var(--card);border:1px solid var(--border);border-radius:8px;padding:22px}
.feat-col h3{color:var(--purple-light);font-size:.88rem;margin-bottom:12px;font-weight:600}
.feat-col ul{list-style:none;padding:0}
.feat-col li{color:var(--muted);font-size:.82rem;padding:6px 0 6px 16px;position:relative;border-bottom:1px solid var(--border)}
.feat-col li:last-child{border-bottom:none}
.feat-col li::before{content:">";position:absolute;left:0;color:var(--purple);font-size:.75rem}
.testimonials{padding:56px 0}
.testi-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.testi-item{background:var(--card);border-left:2px solid var(--purple);padding:20px;border-radius:0 8px 8px 0}
.testi-item p{color:var(--muted);font-size:.84rem;line-height:1.75;margin-bottom:10px;font-style:italic}
.testi-item footer{font-size:.75rem;color:var(--purple-light)}
.install-flow{padding:56px 0;border-top:1px solid var(--border)}
.flow-steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1px;background:var(--border);border:1px solid var(--border);border-radius:8px;overflow:hidden;margin-top:20px}
.flow-step{background:var(--card);padding:24px 18px;text-align:center}
.flow-step .num{color:var(--purple);font-size:1.2rem;font-weight:700;margin-bottom:8px;font-family:monospace}
.flow-step h4{font-size:.85rem;margin-bottom:6px}
.flow-step p{color:var(--muted);font-size:.78rem}
.faq-block{padding:56px 0;border-top:1px solid var(--border)}
.faq-list{max-width:720px;margin:0 auto}
.faq-list details{background:var(--card);border:1px solid var(--border);border-radius:8px;margin-bottom:10px;padding:0}
.faq-list summary{padding:16px 18px;cursor:pointer;font-size:.88rem;font-weight:600;color:var(--text);list-style:none}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list details[open] summary{color:var(--purple-light);border-bottom:1px solid var(--border)}
.faq-list details p{padding:0 18px 16px;color:var(--muted);font-size:.84rem;line-height:1.75}
.cta-terminal{text-align:center;padding:40px 24px;background:var(--card);border:1px solid var(--purple);border-radius:8px;margin:48px 0 0}
.cta-terminal h2{font-size:1.1rem;margin-bottom:8px}
.cta-terminal p{color:var(--muted);font-size:.85rem;margin-bottom:20px}

@media(max-width:768px){
  .about-split{grid-template-columns:1fr}
  .hero-stats{gap:20px}
}

/* 移动端右上角菜单 */
.bar-top .box{position:relative}
.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;width:42px;height:42px;padding:10px;border:1px solid var(--border);border-radius:8px;background:var(--card);cursor:pointer;z-index:120}
.nav-toggle span{display:block;height:2px;width:100%;background:var(--purple-light);border-radius:1px;transition:transform .25s,opacity .2s}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-mask{display:none;position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:90}
.nav-mask.on{display:block}
@media(max-width:768px){
  .nav-toggle{display:flex}
  .tabs{display:none;position:fixed;top:64px;right:12px;left:auto;min-width:180px;flex-direction:column;gap:0;background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:8px;box-shadow:0 12px 40px rgba(0,0,0,.45);z-index:110}
  .tabs.is-open{display:flex}
  .tabs a{display:block;padding:12px 14px;border-radius:6px;font-size:.9rem}
  .tabs a:active,.tabs a:hover{background:var(--card);color:var(--purple-light)}
}