:root{--brand: #1577cc;--brand-soft: #eaf3fc;--ink: #1f2d3d;--muted: #5a6b7b;--line: #e6ebf1;--bg: #f4f6f9;--ok: #1f9d6b}*{box-sizing:border-box}html{scroll-padding-top:0}body{margin:0;background:var(--bg);color:var(--ink);font-family:Noto Sans SC,PingFang SC,Microsoft YaHei,sans-serif}button,input,textarea{font:inherit}button{cursor:pointer}.center-message,.success-page,.login-page{min-height:100vh;display:grid;place-items:center;padding:24px}.toast{position:fixed;top:18px;left:50%;transform:translate(-50%);z-index:20;background:var(--ink);color:#fff;padding:11px 18px;border-radius:10px;box-shadow:0 10px 30px #0003}.topbar{position:sticky;top:0;z-index:10;background:#fffffff0;border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.topbar-inner,.language-nav,.hero,.language-list,.submit-panel,.admin-page{max-width:1240px;margin:0 auto}.topbar-inner{display:flex;align-items:center;justify-content:space-between;padding:11px 24px 0}.topbar-actions{display:flex;align-items:center;gap:8px}.lang-toggle{min-width:36px;font-variant-caps:all-small-caps}.brand-title{display:inline-flex;align-items:center;gap:12px}.brand-icon{width:28px;height:28px;display:inline-grid;place-items:center;border-radius:7px;background:var(--brand);color:#fff;flex:none}.brand-icon svg{width:16px;height:16px}.topbar-inner strong{font-size:16px;line-height:1.2;letter-spacing:0}.ghost-button,.link-button{border:1px solid var(--line);background:#fff;color:var(--muted);border-radius:8px;padding:7px 12px;font-size:13px;font-weight:600}.language-nav{display:flex;gap:8px;overflow-x:auto;padding:11px 24px}.language-nav a{display:inline-flex;align-items:center;gap:6px;color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:9px;padding:7px 13px;text-decoration:none;white-space:nowrap;font-size:13.5px;font-weight:600}.language-nav a.active{border-color:var(--brand);background:var(--brand);box-shadow:none;color:#fff;font-weight:700}.language-nav span{min-width:18px;height:18px;border-radius:9px;display:inline-grid;place-items:center;background:var(--brand);color:#fff;font-size:11px;font-weight:700}.hero{padding:30px 24px 8px}.usage-guide{max-width:920px;border:1px solid rgba(31,123,211,.24);border-left:6px solid var(--brand);border-radius:14px;background:linear-gradient(135deg,#f4f9ff,#fff);box-shadow:0 6px 16px #1f7bd30f;padding:18px 22px;color:var(--ink)}.usage-guide strong{display:block;color:var(--brand);font-size:18px;margin-bottom:10px}.usage-guide ol{margin:0;padding-left:22px;color:var(--muted);font-size:15px;line-height:1.7}.usage-guide li::marker{color:var(--brand);font-weight:700}.language-list{padding:18px 24px 0}.language-section{scroll-margin-top:96px;margin-bottom:16px;overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 1px 3px #143a5e0a}.section-head{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;border:0;background:#fff;padding:18px 22px;color:var(--ink);text-align:left;cursor:default}.section-title-wrap{display:flex;align-items:center;gap:13px;flex-wrap:wrap}.section-title-wrap i{width:8px;height:24px;flex:none;border-radius:4px;background:var(--brand)}.section-title-wrap b{font-size:18px}.section-head em{color:#8a99a8;background:#f2f5f9;border-radius:6px;padding:3px 9px;font-size:12px;font-style:normal}.section-head mark{border-radius:6px;background:var(--brand-soft);color:var(--brand);padding:3px 10px;font-size:12px;font-weight:700}.section-count{display:flex;align-items:center;gap:14px;flex:none;color:var(--brand);font-size:13px;font-weight:700;font-variant-numeric:tabular-nums}.section-count span{color:#8a99a8;font-size:18px}.section-body{padding:2px 22px 22px}.sample-text-card{margin-bottom:16px;border:1px solid #dbe8f6;border-radius:12px;background:linear-gradient(135deg,#f7fbff,#fff);padding:14px 16px}.sample-text-card span{display:inline-flex;align-items:center;margin-bottom:8px;color:var(--brand);font-size:13px;font-weight:700}.sample-text-card p{margin:0;color:#3a4a5a;font-size:14px;line-height:1.75;white-space:pre-line}.voice-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(238px,1fr));gap:14px}.voice-card{border:1px solid var(--line);border-radius:12px;padding:15px;background:#fff;min-height:156px;transition:border-color .15s,background .15s,box-shadow .15s,opacity .15s}.voice-card.selected{border-color:var(--brand);box-shadow:0 0 0 1px var(--brand) inset;background:var(--brand-soft)}.voice-card.disabled{opacity:.52}.voice-card-head{min-height:28px;display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.voice-card h3{margin:0;font-size:16px;line-height:1.4}.audio-row{display:flex;align-items:center;gap:12px;margin-top:16px;padding:2px 0 4px}.play-icon-button{width:36px;height:36px;display:grid;place-items:center;border:0;border-radius:50%;background:var(--brand);color:#fff;font-size:14px;line-height:1;flex:none;box-shadow:0 2px 6px #1577cc47;transition:transform .15s,background .15s}.play-icon-button:hover{transform:scale(1.05)}.audio-track{flex:1;height:5px;overflow:hidden;border-radius:999px;background:#e7edf3;min-width:0}.audio-progress{display:block;width:0%;height:100%;border-radius:inherit;background:var(--brand);transition:width .1s linear}.audio-row time{flex:none;min-width:42px;color:#8a99a8;font-size:12px;font-variant-numeric:tabular-nums;text-align:right}.play-button,.select-button,.submit-panel button,.login-card button,.admin-header button,.export-button{border:1px solid var(--brand);background:var(--brand);color:#fff;border-radius:9px;padding:10px 14px;font-weight:700}.play-button{margin-right:8px;background:#fff;color:var(--brand)}.select-button{width:100%;height:40px;margin-top:12px;border-width:1.5px;background:#fff;color:var(--brand);font-size:14px}.voice-card.selected .select-button{background:var(--brand);color:#fff}.opinion-box{display:block;margin-top:18px}.opinion-box span{display:block;margin-bottom:8px;font-weight:700;font-size:13px;color:#3a4a5a}.opinion-box textarea{width:100%;min-height:78px;border:1px solid #e2e8f0;border-radius:10px;padding:12px 14px;resize:vertical}.opinion-box small{display:block;margin-top:4px;color:#8a99a8;text-align:right}.submit-panel{margin-top:8px;margin-bottom:40px;padding:24px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 1px 3px #143a5e0a}.submit-panel label{display:block;font-weight:700}.submit-panel label span{color:#e0533c}.submit-panel input,.login-card input{display:block;width:min(100%,340px);margin-top:8px;border:1px solid #e2e8f0;border-radius:10px;padding:12px 14px}.login-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:16px}.summary{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}.summary span{background:#f2f5f9;border-radius:8px;padding:6px 12px;color:#3a4a5a;font-size:13px}.success-card,.login-card,.admin-card,.metric{background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px}.success-icon{width:64px;height:64px;display:grid;place-items:center;margin:0 auto 16px;border-radius:50%;background:#e6f5ee;color:var(--ok);font-size:34px}.admin-page{padding:24px}.admin-header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 0}.admin-header h1{margin:0}.admin-header p{margin:4px 0 0;color:var(--muted)}.export-button{display:inline-block;margin-right:10px;text-decoration:none}.metric-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:14px}.metric span{color:var(--muted);font-size:13px}.metric strong{display:block;margin-top:8px;font-size:30px}.admin-card{margin-top:16px;overflow-x:auto}table{width:100%;min-width:720px;border-collapse:collapse}th,td{border-top:1px solid #edf1f5;padding:10px 12px;text-align:left}th{color:#8a99a8;font-weight:600}@media (max-width: 760px){.section-head,.admin-header{align-items:flex-start;flex-direction:column}.submit-panel{border-radius:0;margin-bottom:0}}