*{margin:0;padding:0;box-sizing:border-box}:root{--primary: #6366f1;--primary-dark: #4f46e5;--success: #22c55e;--warning: #f59e0b;--danger: #ef4444;--bg: #fafafa;--card: #ffffff;--text: #1e293b;--text-secondary: #64748b;--border: #e2e8f0;--radius: 12px}body{font-family:Noto Sans SC,Inter,-apple-system,sans-serif;background:var(--bg);color:var(--text);min-height:100vh}.container{max-width:640px;margin:0 auto;padding:16px}.home{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;text-align:center;padding:32px 16px}.home h1{font-size:2rem;font-weight:700;margin-bottom:8px;background:linear-gradient(135deg,var(--primary),#a855f7);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.home .subtitle{color:var(--text-secondary);margin-bottom:48px;font-size:1.1rem}.home .features{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:48px;width:100%;max-width:400px}.feature-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px 16px;text-align:center}.feature-card .icon{font-size:2rem;margin-bottom:8px}.feature-card .label{font-size:.85rem;color:var(--text-secondary)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 32px;border-radius:999px;font-size:1rem;font-weight:600;border:none;cursor:pointer;transition:all .2s}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 4px 12px #6366f14d}.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary)}.btn-large{padding:16px 48px;font-size:1.1rem}.btn:disabled{opacity:.5;cursor:not-allowed}.test-page{min-height:100vh;padding-bottom:120px}.progress-bar{height:4px;background:var(--border);border-radius:2px;margin:16px 0;overflow:hidden}.progress-bar .fill{height:100%;background:var(--primary);border-radius:2px;transition:width .3s}.step-info{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.step-label{font-size:.85rem;color:var(--text-secondary)}.step-badge{background:var(--primary);color:#fff;padding:4px 12px;border-radius:999px;font-size:.8rem;font-weight:600}.question-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:32px 24px;margin-bottom:24px}.question-card .type-label{font-size:.75rem;text-transform:uppercase;letter-spacing:1px;color:var(--primary);font-weight:600;margin-bottom:16px}.question-card .content{font-size:1.5rem;line-height:1.8;font-weight:500}.question-card .content.article{font-size:1.1rem;line-height:2;white-space:pre-wrap}.question-card .pinyin{color:var(--text-secondary);font-size:.9rem;margin-top:8px}.recorder{position:fixed;bottom:0;left:0;right:0;background:var(--card);border-top:1px solid var(--border);padding:16px;display:flex;flex-direction:column;align-items:center;gap:12px;z-index:100}.recorder .status{font-size:.85rem;color:var(--text-secondary)}.recorder .timer{font-size:1.2rem;font-weight:600;font-variant-numeric:tabular-nums}.record-btn{width:64px;height:64px;border-radius:50%;border:3px solid var(--danger);background:transparent;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s}.record-btn .inner{width:28px;height:28px;background:var(--danger);border-radius:50%;transition:all .2s}.record-btn.recording .inner{width:20px;height:20px;border-radius:4px}.recorder .actions{display:flex;gap:12px}.score-feedback{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-bottom:24px;text-align:center}.score-feedback .big-score{font-size:3rem;font-weight:700;color:var(--primary)}.score-feedback .level{color:var(--text-secondary);margin-bottom:16px}.score-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px;margin-top:16px}.score-item{text-align:center}.score-item .value{font-size:1.5rem;font-weight:600}.score-item .label{font-size:.75rem;color:var(--text-secondary)}.error-list{margin-top:16px;text-align:left}.error-item{background:#fef2f2;border:1px solid #fecaca;border-radius:8px;padding:12px;margin-bottom:8px;font-size:.85rem}.error-item .type{font-weight:600;color:var(--danger)}.result-page{padding:32px 16px}.result-header{text-align:center;margin-bottom:32px}.result-header .score{font-size:4rem;font-weight:700;background:linear-gradient(135deg,var(--primary),#a855f7);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.result-header .level-badge{display:inline-block;padding:6px 20px;border-radius:999px;background:var(--primary);color:#fff;font-weight:600;margin-top:8px}.result-section{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:16px}.result-section h3{font-size:.85rem;color:var(--text-secondary);margin-bottom:12px}.loading{display:flex;align-items:center;justify-content:center;min-height:60vh;font-size:1.1rem;color:var(--text-secondary)}@media (max-width: 480px){.home h1{font-size:1.5rem}.question-card .content{font-size:1.2rem}}