:root{--accent: #c8522a;--accent-light: #e8d5cc;--bg: #f8f6f3;--surface: #ffffff;--surface-hover: #fdf9f7;--text-primary: #1a1a1a;--text-secondary: #555555;--text-muted: #888888;--border: rgba(0, 0, 0, .08);--shadow: 0 2px 12px rgba(0, 0, 0, .07);--shadow-hover: 0 4px 20px rgba(0, 0, 0, .11);--radius: 12px;--font-zh: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text-primary);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica,Arial,sans-serif;font-size:15px;line-height:1.5;min-height:100vh}a{color:var(--accent);text-decoration:none}button{cursor:pointer;font-family:inherit;font-size:inherit;border:none;background:none}.page{max-width:780px;margin:0 auto;padding:0 20px 60px}.app-header{display:flex;align-items:flex-end;justify-content:space-between;padding:36px 0 28px;gap:16px}.app-header-left{flex:1;min-width:0;display:flex;align-items:center;gap:12px}.app-title{font-size:1.9rem;font-weight:700;letter-spacing:-.02em;color:var(--text-primary);line-height:1.1}.app-title span{color:var(--accent)}.app-subtitle{margin-top:6px;font-size:.85rem;color:var(--text-muted)}.dialect-dropdown{position:relative;flex-shrink:0}.dialect-btn{display:flex;align-items:center;gap:5px;padding:6px 10px;min-height:36px;border-radius:8px;border:1px solid var(--border);background:var(--surface);color:var(--text-secondary);font-family:inherit;font-size:.78rem;font-weight:600;cursor:pointer;box-shadow:var(--shadow);white-space:nowrap}.dialect-btn:hover{background:var(--surface-hover);box-shadow:var(--shadow-hover)}.dialect-options{position:absolute;top:calc(100% + 4px);right:0;background:var(--surface);border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow-hover);overflow:hidden;z-index:100;min-width:120px}.dialect-options button{display:block;width:100%;padding:10px 14px;text-align:left;font-size:.82rem;font-weight:500;color:var(--text-primary);cursor:pointer;transition:background .1s}.dialect-options button:hover{background:var(--surface-hover)}.dialect-options button.active{color:var(--accent);font-weight:700}.domain-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.domain-card{background:var(--surface);border-radius:var(--radius);border:1px solid var(--border);box-shadow:var(--shadow);padding:20px;cursor:pointer;position:relative;overflow:hidden;transition:box-shadow .15s,transform .15s,background .15s;display:flex;flex-direction:column;gap:6px;min-height:130px}.domain-card:hover:not(.empty){box-shadow:var(--shadow-hover);transform:translateY(-1px);background:var(--surface-hover)}.domain-card.empty{opacity:.42;cursor:default;pointer-events:none}.domain-number{position:absolute;top:10px;right:14px;font-size:3rem;font-weight:800;color:var(--text-primary);opacity:.055;line-height:1;-webkit-user-select:none;user-select:none}.domain-name{font-size:.95rem;font-weight:600;color:var(--text-primary);line-height:1.3;padding-right:28px}.domain-desc{font-size:.78rem;color:var(--text-muted);line-height:1.45;flex:1}.domain-count{margin-top:4px;font-size:.75rem;font-weight:600;color:var(--accent);letter-spacing:.01em}.domain-card.empty .domain-count{color:var(--text-muted);font-weight:400}.detail-title-row{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.back-btn{display:inline-flex;align-items:center;gap:4px;padding:6px 12px;min-height:36px;border-radius:8px;border:1px solid var(--border);background:var(--surface);color:var(--text-secondary);font-size:.82rem;font-weight:600;box-shadow:var(--shadow);transition:background .15s,box-shadow .15s,color .15s;text-decoration:none}.back-btn:hover{background:var(--surface-hover);box-shadow:var(--shadow-hover);color:var(--text-primary)}.detail-title{font-size:1.5rem;font-weight:700;letter-spacing:-.02em;line-height:1.2;flex:1}.detail-desc{margin-top:6px;font-size:.83rem;color:var(--text-muted);line-height:1.5}.section-heading{margin:32px 0 12px;font-size:.7rem;font-weight:600;text-transform:uppercase;letter-spacing:.09em;color:var(--text-muted)}.section-heading:first-child{margin-top:8px}.chunk-list{display:flex;flex-direction:column;gap:10px}.chunk-card{background:var(--surface);border-radius:var(--radius);border:1px solid var(--border);box-shadow:var(--shadow);padding:16px 18px;display:flex;flex-direction:column;transition:box-shadow .12s,background .12s,opacity .2s;-webkit-tap-highlight-color:transparent}.chunk-card:hover{box-shadow:var(--shadow-hover);background:var(--surface-hover)}.zh-pinyin-row{display:flex;flex-wrap:wrap;align-items:flex-end;gap:2px 6px;margin-bottom:4px}.token{display:flex;flex-direction:column;align-items:center;line-height:1}.token--punct{align-self:flex-start}.token-zh{font-family:var(--font-zh);font-size:1.45rem;font-weight:500;color:var(--text-primary);line-height:1.3}.token-py{font-size:.7rem;letter-spacing:.01em;white-space:nowrap;margin-top:2px}.tone-1{color:#c62828}.tone-2{color:#e65100}.tone-3{color:#1b5e20}.tone-4{color:#0d47a1}.tone-0{color:var(--text-muted)}.en{margin-top:3px;font-size:.78rem;color:var(--text-muted);font-style:italic}.chunk-card-actions{display:flex;align-items:center;gap:6px;margin-top:12px;justify-content:flex-end}.copy-btn{padding:6px 12px;min-height:36px;min-width:64px;background:var(--bg);color:var(--text-secondary);border:1px solid var(--border);border-radius:8px;font-size:.72rem;font-weight:600;letter-spacing:.03em;transition:background .12s,color .12s,border-color .12s;white-space:nowrap}.speak-btn{display:flex;align-items:center;justify-content:center;gap:5px;padding:6px 12px;min-height:36px;border-radius:8px;background:var(--bg);border:1px solid var(--border);color:var(--text-secondary);font-size:.72rem;font-weight:600;letter-spacing:.03em;transition:background .12s,color .12s,border-color .12s;white-space:nowrap;flex-shrink:0}.speak-btn:hover:not(.disabled){background:var(--accent);color:#fff;border-color:var(--accent)}.speak-btn.playing{background:var(--accent);color:#fff;border-color:var(--accent);animation:tts-pulse 1.2s ease-in-out infinite}.speak-btn.disabled{opacity:.3;cursor:not-allowed}.check-btn{display:flex;align-items:center;justify-content:center;gap:5px;padding:6px 12px;min-height:36px;border-radius:8px;background:var(--bg);border:1px solid var(--border);color:var(--text-secondary);font-size:.72rem;font-weight:600;letter-spacing:.03em;transition:background .12s,color .12s,border-color .12s;white-space:nowrap;flex-shrink:0;margin-right:auto}@media (hover: hover){.check-btn:not(.checked):hover{background:var(--surface-hover);border-color:var(--text-muted)}}.check-btn.checked{background:#c8e6c9;color:#1b5e20;border-color:#a5d6a7}.chunk-card.checked{opacity:.5}.chunk-card.checked:hover{opacity:1}.checked-progress{margin-top:4px;font-size:.78rem;color:#1b5e20;font-weight:600}@keyframes tts-pulse{0%,to{opacity:1}50%{opacity:.55}}.copy-btn:hover,.copy-btn.copied{background:var(--accent);color:#fff;border-color:var(--accent)}.detail-actions{display:flex;align-items:center;gap:8px;flex-shrink:0}.slow-toggle{padding:8px 14px;background:var(--surface);color:var(--text-secondary);border:1px solid var(--border);border-radius:8px;font-size:.78rem;font-weight:600;min-height:36px;transition:background .15s,color .15s,border-color .15s;white-space:nowrap}.slow-toggle.active{background:var(--accent-light);color:var(--accent);border-color:var(--accent)}.slow-toggle:hover{border-color:var(--accent)}@media (max-width: 600px){.app-header{padding:24px 0 20px}.app-title{font-size:1.5rem}.domain-grid{grid-template-columns:1fr;gap:10px}.domain-card{min-height:auto}.detail-title-row{flex-direction:column;gap:12px}.chunk-card{padding:14px 16px}.token-zh{font-size:1.3rem}.copy-btn{min-width:52px;padding:6px 8px}}@media (max-width: 380px){.page{padding:0 14px 48px}}