*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;background:#f6f6f4;color:#222;line-height:1.6}
.wrap{max-width:1024px;margin:0 auto;padding:0 16px}
.topbar{background:#1f2937;color:#fff;position:sticky;top:0;z-index:10}
.topbar-inner{display:flex;align-items:center;gap:24px;min-height:56px}
.logo{font-size:22px;font-weight:800;cursor:pointer;letter-spacing:1px}.logo span{color:#f59e0b;margin-left:4px}
.nav{display:flex;gap:4px;flex-wrap:wrap}.nav-btn{background:transparent;border:0;color:#d1d5db;padding:8px 12px;cursor:pointer;font-size:15px;border-radius:6px}
.nav-btn.active,.nav-btn:hover{background:#374151;color:#fff}
main{padding:24px 16px 64px}h1{font-size:26px;margin:8px 0 16px}h2{font-size:20px;margin-top:28px}
.hero{background:#fff;border:1px solid #e5e7eb;border-radius:12px;padding:28px;margin-top:20px}
.hero h1{font-size:30px;margin:0}.hero p{color:#555}
.hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}
.btn{background:#fff;border:1px solid #d1d5db;border-radius:8px;padding:9px 16px;cursor:pointer;font-size:15px}
.btn.primary{background:#2563eb;border-color:#2563eb;color:#fff}.btn.danger{color:#b91c1c;border-color:#fecaca}
.btn.small{padding:6px 10px;font-size:14px}
.stats{display:flex;gap:24px;margin-top:20px;color:#555;flex-wrap:wrap}.stats b{color:#111;font-size:20px;display:block}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.card{background:#fff;border:1px solid #e5e7eb;border-radius:10px;overflow:hidden;cursor:pointer}
.card img{width:100%;height:180px;object-fit:cover;background:#e5e7eb;display:block}
.card-body{padding:12px}.card-body h3{margin:0 0 6px;font-size:17px}.card-body p{margin:2px 0;color:#666;font-size:14px}
.progress{height:6px;background:#e5e7eb;border-radius:3px;overflow:hidden;margin-top:8px}.progress i{display:block;height:100%;background:#2563eb}
.toolbar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px}.toolbar input,.toolbar select,.form input,.form select{padding:9px 12px;border:1px solid #d1d5db;border-radius:8px;font-size:15px}
.hint{color:#666}.result{font-weight:600}
.form{display:grid;grid-template-columns:1fr 220px;gap:16px;max-width:720px}.form label{display:grid;gap:6px;color:#333}
.import-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;margin-top:20px}
.import-card{background:#fff;border:1px solid #e5e7eb;border-radius:10px;padding:16px}.import-card h3{margin-top:0}
.chapter-list{display:grid;gap:8px}.chapter-row{display:flex;justify-content:space-between;gap:12px;background:#fff;border:1px solid #e5e7eb;border-radius:8px;padding:12px 14px;cursor:pointer}
.danger-zone{margin-top:32px;border-top:1px solid #e5e7eb;padding-top:16px;display:flex;gap:16px;align-items:center;flex-wrap:wrap}
.about{background:#fff;border:1px solid #e5e7eb;border-radius:10px;padding:20px}
.reader{position:fixed;inset:0;background:#111;z-index:50;overflow:auto;color:#fff;display:flex;flex-direction:column}
#reader[hidden]{display:none !important}
.reader-bar,.reader-controls{display:flex;gap:10px;align-items:center;padding:10px 14px;flex-wrap:wrap}
.reader-title{font-weight:700}.reader-page{color:#d1d5db;margin-left:auto}
.reader-controls select,.reader-controls input{padding:7px 10px;border-radius:6px;border:1px solid #555;background:#222;color:#fff}
.reader-controls input{width:84px}
.reader-pages{display:flex;justify-content:center;gap:8px;padding:8px 12px 24px;flex:1}
.reader-pages img{max-width:100%;max-height:calc(100vh - 170px);object-fit:contain;background:#000;cursor:pointer}
.reader-pages.double img{max-width:49%}
.reader-hint{text-align:center;color:#9ca3af;margin:0 0 16px;font-size:13px}
@media(max-width:640px){.form{grid-template-columns:1fr}.hero h1{font-size:26px}.reader-pages.double{flex-direction:column}.reader-pages.double img{max-width:100%}}