.app[data-v-6a365244]{min-height:100vh;background:var(--bg)}.header[data-v-6a365244]{background:linear-gradient(135deg,var(--primary) 0%,#8b5cf6 100%);color:#fff;padding:12px 18px;position:sticky;top:0;z-index:100;box-shadow:0 4px 20px #6366f140}.header-content[data-v-6a365244]{max-width:900px;margin:0 auto;display:flex;justify-content:space-between;align-items:center}.header-actions[data-v-6a365244]{display:flex;align-items:center;gap:8px}.lang-switch-box[data-v-6a365244]{display:flex;background:#0003;border:1px solid rgba(255,255,255,.35);padding:3px;border-radius:20px;gap:2px}.lang-btn[data-v-6a365244]{background:transparent;border:none;color:#ffffffd9;padding:4px 10px;border-radius:16px;font-size:12px;font-weight:700;cursor:pointer;transition:all .2s ease}.lang-btn.active[data-v-6a365244]{background:#fff;color:#4f46e5;box-shadow:0 2px 8px #00000026}.logo[data-v-6a365244]{display:flex;align-items:center;gap:8px;text-decoration:none;color:#fff}.logo-icon[data-v-6a365244]{font-size:22px}.logo-text[data-v-6a365244]{font-size:17px;font-weight:700}.theme-toggle-btn[data-v-6a365244]{background:#fff3;border:1px solid rgba(255,255,255,.3);color:#fff;padding:5px 12px;border-radius:20px;cursor:pointer;font-size:12px;font-weight:600;transition:all .2s ease;display:flex;align-items:center;gap:4px}.theme-toggle-btn[data-v-6a365244]:hover{background:#ffffff59}.back-btn[data-v-6a365244]{background:#fff3;border:none;color:#fff;padding:5px 12px;border-radius:8px;cursor:pointer;font-size:13px;transition:background .2s}.back-btn[data-v-6a365244]:hover{background:#ffffff4d}.main[data-v-6a365244]{max-width:900px;margin:0 auto;padding:16px 16px 85px}.bottom-nav[data-v-6a365244]{position:fixed;bottom:0;left:0;right:0;height:60px;background:var(--bg-card);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-top:1px solid var(--card-border);display:flex;justify-content:space-around;align-items:center;z-index:999;box-shadow:0 -4px 20px #00000014;padding-bottom:env(safe-area-inset-bottom)}.nav-item[data-v-6a365244]{display:flex;flex-direction:column;align-items:center;justify-content:center;text-decoration:none;color:var(--text-light);font-size:11px;font-weight:600;gap:2px;flex:1;height:100%;-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none;transition:color .2s ease}.nav-icon[data-v-6a365244]{font-size:20px;line-height:1;transition:transform .2s ease}.nav-item.active[data-v-6a365244]{color:var(--primary)}.nav-item.active .nav-icon[data-v-6a365244]{transform:scale(1.15)}.toast[data-v-6a365244]{position:fixed;bottom:80px;left:50%;transform:translate(-50%) translateY(100px);background:var(--text);color:#fff;padding:12px 20px;border-radius:12px;font-size:13px;font-weight:500;z-index:1000;opacity:0;transition:all .3s ease;box-shadow:0 10px 30px #0003}.toast.show[data-v-6a365244]{transform:translate(-50%) translateY(0);opacity:1}.fade-enter-active[data-v-6a365244],.fade-leave-active[data-v-6a365244]{transition:opacity .2s ease}.fade-enter-from[data-v-6a365244],.fade-leave-to[data-v-6a365244]{opacity:0}@media (max-width: 640px){.header[data-v-6a365244]{padding:8px 12px}.logo-text[data-v-6a365244]{display:none}.logo-icon[data-v-6a365244]{font-size:20px}.lang-btn[data-v-6a365244]{padding:3px 8px;font-size:11px}.theme-toggle-btn[data-v-6a365244]{padding:4px 8px;font-size:11px}.main[data-v-6a365244]{padding:12px 12px 80px}.nav-icon[data-v-6a365244]{font-size:18px}.nav-label[data-v-6a365244]{font-size:10px}}:root{--primary: #6366f1;--primary-dark: #4f46e5;--primary-light: #818cf8;--primary-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #d946ef 100%);--success: #10b981;--success-light: #d1fae5;--warning: #f59e0b;--danger: #ef4444;--bg: #f8fafc;--bg-card: rgba(255, 255, 255, .9);--bg-card-hover: rgba(255, 255, 255, 1);--card-border: rgba(226, 232, 240, .8);--text: #0f172a;--text-light: #64748b;--text-muted: #94a3b8;--border: #e2e8f0;--shadow: 0 10px 25px -5px rgba(0, 0, 0, .05), 0 8px 10px -6px rgba(0, 0, 0, .03);--shadow-lg: 0 20px 35px -10px rgba(99, 102, 241, .15);--radius-sm: 10px;--radius: 16px;--radius-lg: 24px}[data-theme=dark]{--primary: #818cf8;--primary-dark: #6366f1;--primary-light: #a5b4fc;--primary-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #9333ea 100%);--bg: #0f172a;--bg-card: rgba(30, 41, 59, .75);--bg-card-hover: rgba(51, 65, 85, .85);--card-border: rgba(255, 255, 255, .1);--text: #f8fafc;--text-light: #94a3b8;--text-muted: #64748b;--border: #334155;--shadow: 0 10px 25px -5px rgba(0, 0, 0, .3), 0 8px 10px -6px rgba(0, 0, 0, .2);--shadow-lg: 0 20px 35px -10px rgba(99, 102, 241, .25)}*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}body{font-family:-apple-system,BlinkMacSystemFont,SF Pro Display,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);background-image:radial-gradient(at 0% 0%,rgba(99,102,241,.08) 0px,transparent 50%),radial-gradient(at 100% 100%,rgba(217,70,239,.08) 0px,transparent 50%);background-attachment:fixed;color:var(--text);line-height:1.6;font-size:15px;transition:background-color .3s ease,color .3s ease}[data-theme=dark] body{background-image:radial-gradient(at 0% 0%,rgba(99,102,241,.15) 0px,transparent 50%),radial-gradient(at 100% 100%,rgba(168,85,247,.15) 0px,transparent 50%)}a{color:inherit;text-decoration:none}.card{background:var(--bg-card);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--card-border);border-radius:var(--radius-lg);padding:20px;box-shadow:var(--shadow);transition:all .3s cubic-bezier(.4,0,.2,1)}.card:hover{background:var(--bg-card-hover);transform:translateY(-3px);border-color:#6366f140;box-shadow:var(--shadow-lg)}.card:active{transform:translateY(-1px)}.badge{display:inline-flex;align-items:center;gap:4px;padding:4px 12px;border-radius:20px;font-size:11px;font-weight:700;letter-spacing:.3px}.badge-easy{background:#dcfce7;color:#15803d;border:1px solid #bbf7d0}.badge-medium{background:#fef3c7;color:#b45309;border:1px solid #fde68a}.badge-hard{background:#fee2e2;color:#b91c1c;border:1px solid #fca5a5}[data-theme=dark] .badge-easy{background:#10b98133;color:#34d399;border-color:#34d3994d}[data-theme=dark] .badge-medium{background:#f59e0b33;color:#fbbf24;border-color:#fbbf244d}[data-theme=dark] .badge-hard{background:#ef444433;color:#f87171;border-color:#f871714d}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:4px}[data-theme=dark] ::-webkit-scrollbar-thumb{background:#334155}.data-table{width:100%;border-collapse:collapse;font-size:14px;margin:14px 0;border-radius:var(--radius-sm);overflow:hidden}.data-table th{background:var(--primary);color:#fff;padding:12px 14px;text-align:left;font-weight:600;font-size:13px}.data-table td{padding:12px 14px;border-bottom:1px solid var(--border);background:var(--bg-card)}.data-table tr:last-child td{border-bottom:none}.highlight{color:var(--primary);font-weight:700}.example-box{background:#f0f9ff;border-left:4px solid #3b82f6;padding:14px 16px;border-radius:0 var(--radius-sm) var(--radius-sm) 0;margin:12px 0;font-size:14px}.example-box .en{font-weight:600;color:var(--text);margin-bottom:4px}.example-box .zh{color:var(--text-light);font-size:13px}[data-theme=dark] .example-box{background:#3b82f626;border-left-color:#60a5fa}[data-theme=dark] .example-box .en{color:#f1f5f9}.tip-box{background:#fffbeb;border-left:4px solid #f59e0b;padding:14px 16px;border-radius:0 var(--radius-sm) var(--radius-sm) 0;margin:12px 0;font-size:14px;color:#78350f}[data-theme=dark] .tip-box{background:#f59e0b26;color:#fef3c7}.error-box{background:#fef2f2;border-left:4px solid #ef4444;padding:14px 16px;border-radius:0 var(--radius-sm) var(--radius-sm) 0;margin:12px 0;font-size:14px;color:#991b1b}[data-theme=dark] .error-box{background:#ef444426;color:#fecdd3}