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var(--border);background:var(--bg-primary);color:var(--text-primary);font-family:var(--font-body);font-size:15px;outline:none;transition:all var(--transition-hover)}.input::placeholder{color:var(--text-tertiary)}.input:focus{border-color:var(--app-accent, var(--brand));box-shadow:0 0 0 3px #ff6b3526}.input-error{border-color:var(--error)}.input-error:focus{box-shadow:0 0 0 3px #ff3b3026}.error-msg{font-size:12px;color:var(--error)}.pill-group{display:inline-flex;gap:4px;padding:4px;background:var(--bg-primary);border-radius:var(--radius-pill);border:1px solid var(--border)}.pill{padding:8px 20px;border-radius:var(--radius-pill);font-size:14px;font-weight:500;cursor:pointer;border:none;background:transparent;color:var(--text-secondary);font-family:var(--font-body);transition:all .25s cubic-bezier(.34,1.56,.64,1)}.pill:hover{color:var(--text-primary)}.pill.active{background:var(--app-accent, var(--brand));color:#fff;box-shadow:0 2px 8px #ff6b354d}.badge{display:inline-flex;align-items:center;gap:4px;padding:2px 10px;border-radius:var(--radius-pill);font-size:12px;font-weight:500;background:var(--bg-elevated);color:var(--text-secondary)}.badge-accent{background:var(--app-accent, var(--brand));color:#fff}.badge-success{background:var(--success);color:#fff}.badge-warning{background:var(--warning);color:#fff}.badge-info{background:var(--info);color:#fff}.steps{display:flex;align-items:center;width:100%}.step{display:flex;align-items:center;gap:var(--space-2);flex:1}.step:not(:last-child):after{content:"";flex:1;height:2px;background:var(--border);margin:0 var(--space-2)}.step.done:not(:last-child):after{background:var(--app-accent, var(--brand))}.step.active:not(:last-child):after{background:linear-gradient(90deg,var(--app-accent, var(--brand)),var(--border))}.step-dot{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:600;flex-shrink:0;border:2px solid var(--border);color:var(--text-tertiary);transition:all .3s ease}.step.done .step-dot{background:var(--app-accent, var(--brand));border-color:var(--app-accent, var(--brand));color:#fff}.step.active .step-dot{border-color:var(--app-accent, var(--brand));color:var(--app-accent, var(--brand));box-shadow:0 0 0 4px #ff6b3533}.step-label{font-size:12px;color:var(--text-secondary)}.step.active .step-label{color:var(--app-accent, var(--brand));font-weight:500}.progress{display:flex;align-items:center;gap:var(--space-2)}.progress-track{flex:1;height:6px;background:var(--bg-elevated);border-radius:3px;overflow:hidden}.progress-fill{height:100%;border-radius:3px;background:var(--app-accent, var(--brand));transition:width .5s ease}.progress-value{font-size:12px;color:var(--text-secondary);min-width:36px;text-align:right}.rank-badge{display:inline-block;padding:4px 14px;border-radius:var(--radius-pill);font-size:13px;font-weight:600;background:linear-gradient(135deg,var(--brand),var(--detective));color:#fff}.page{min-height:100vh}.page-center{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:var(--space-5)}.container{max-width:1200px;margin:0 auto;padding:0 var(--space-6)}.topbar{display:flex;justify-content:space-between;align-items:center;height:64px;padding:0 var(--space-6);background:#0a0e27d9;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-bottom:1px solid var(--border)}[data-theme=light] .topbar{background:#f7f5f0d9}.topbar-left{display:flex;align-items:center;gap:var(--space-3)}.topbar-logo{font-size:20px;font-weight:700;display:flex;align-items:center;gap:10px}.topbar-logo-icon{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;background:linear-gradient(135deg,var(--brand),var(--brand-gold));border-radius:var(--radius-sm);font-size:18px}.topbar-brand-slogan{font-size:11px;color:var(--text-tertiary);margin-left:4px}.topbar-right{display:flex;align-items:center;gap:var(--space-3)}.topbar-user{font-size:14px;color:var(--text-secondary)}.topbar-btn{padding:6px 14px;border:1px solid var(--border);border-radius:var(--radius-sm);background:transparent;color:var(--text-secondary);font-size:13px;cursor:pointer;transition:all var(--transition-hover)}.topbar-btn:hover{border-color:var(--app-accent, var(--brand));color:var(--app-accent, var(--brand))}.theme-toggle{display:flex;align-items:center;gap:4px;padding:3px;border-radius:var(--radius-pill);background:var(--bg-elevated);border:1px solid var(--border);cursor:pointer;-webkit-user-select:none;user-select:none}.theme-opt{padding:5px 14px;border-radius:var(--radius-pill);font-size:13px;font-weight:500;color:var(--text-tertiary);cursor:pointer;transition:all .25s cubic-bezier(.34,1.56,.64,1)}.theme-opt.active{background:var(--brand);color:#fff;box-shadow:0 2px 8px #ff6b354d}@keyframes fadeUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.anim-fade-up{animation:fadeUp .5s ease both}.anim-spin{animation:spin 1s linear infinite}@media(max-width:1024px){.topbar,.container{padding:0 var(--space-4)}}@media(max-width:767px){html{font-size:15px}.topbar{padding:0 var(--space-3);height:56px}.topbar-logo{font-size:17px}.topbar-logo-icon{width:28px;height:28px;font-size:15px}.topbar-user{font-size:12px}.topbar-btn{padding:4px 10px;font-size:12px}.page-center{padding:var(--space-4)}.container{padding:0 var(--space-3)}.card{padding:var(--space-4)}.btn{padding:8px 18px;font-size:14px}.btn-lg{padding:12px 24px;font-size:15px}.btn-sm{padding:5px 12px;font-size:12px}.pill-group{flex-wrap:wrap;width:100%}.pill{padding:6px 14px;font-size:13px}.steps{flex-direction:column;align-items:flex-start;gap:var(--space-2)}.step:not(:last-child):after{display:none}}:root{--app-accent: var(--detective)}.difficulty-tag{font-size:12px;padding:2px 10px;border-radius:var(--radius-pill);background:var(--bg-elevated)}.topic-tag{font-size:12px;padding:2px 10px;border-radius:var(--radius-pill);background:#3498db26;color:var(--info)}.crime-tag{display:inline-block;padding:2px 8px;border-radius:var(--radius-sm);font-size:11px;font-weight:600}.tag-fact{background:#e74c3c26;color:#e74c3c}.tag-logic{background:#f39c1226;color:var(--warning)}.tag-bias{background:#3498db26;color:var(--info)}.investigation-panel{display:flex;gap:24px;height:calc(100vh - 64px)}.text-panel{flex:1;background:var(--bg-surface);border-radius:var(--radius-lg);padding:var(--space-5);overflow-y:auto;border:1px solid var(--border)}.text-content{font-size:16px;line-height:1.8;white-space:pre-wrap}.toolbar-panel{width:360px;flex-shrink:0;background:var(--bg-surface);border-radius:var(--radius-lg);padding:var(--space-5);border:1px solid var(--border);display:flex;flex-direction:column}.detective-layout{display:flex;gap:24px;padding:24px;max-width:1400px;margin:0 auto;width:100%}.detective-sidebar{width:260px;flex-shrink:0;display:flex;flex-direction:column;gap:16px}.detective-main{flex:1}@media(max-width:767px){.investigation-panel{flex-direction:column;height:auto;gap:12px}.text-panel{min-height:300px;max-height:50vh}.toolbar-panel{width:100%;max-height:40vh}.detective-layout{flex-direction:column;padding:12px;gap:12px}.detective-sidebar{width:100%}}:root{--app-accent: var(--sparklab)}.spark-loading-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100vh;gap:12px}.spark-loading-spinner{font-size:48px;animation:spin 1s linear infinite}.spark-welcome-icon{font-size:56px;display:block;margin-bottom:var(--space-4)}.spark-send-btn{width:38px;height:38px;border:none;border-radius:var(--radius-sm);background:var(--sparklab);color:#fff;font-size:18px;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:background .2s}.spark-send-btn:hover:not(:disabled){background:#26b88a}.spark-send-btn:disabled{opacity:.3;cursor:not-allowed}.spark-mb{display:flex;gap:10px;margin-bottom:20px;animation:fadeUp .2s ease}.spark-mb-user{justify-content:flex-end}.spark-mb-ai{justify-content:flex-start}.spark-mb-avatar{width:30px;height:30px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0;background:var(--bg-elevated)}.spark-mb-avatar.user-avatar{background:#2dd4a033}.spark-mb-bubble{max-width:75%;padding:12px 16px;font-size:15px;line-height:1.65;border-radius:14px;white-space:pre-wrap;word-break:break-word}.spark-mb-bubble.user{background:#2dd4a01a;border-bottom-right-radius:4px}.spark-mb-bubble.ai{background:var(--bg-surface);border:1px solid var(--border);border-bottom-left-radius:4px}.spark-mb-bubble.streaming{border-color:var(--brand)}.spark-mb-html{line-height:1.65}.spark-cursor{display:inline-block;animation:pulse 1s infinite;color:var(--brand);font-weight:700}.spark-thinking-box{max-width:75%;background:var(--bg-elevated);border-radius:10px;border:1px solid var(--border);font-size:13px}.spark-thinking-box summary{padding:8px 12px;cursor:pointer;color:var(--text-tertiary);font-size:12px;-webkit-user-select:none;user-select:none;border-radius:10px}.spark-thinking-box[open] summary{border-bottom:1px solid var(--border);border-radius:10px 10px 0 0}.spark-thinking-content{padding:8px 12px 12px;margin:0;white-space:pre-wrap;font-size:12px;color:var(--text-tertiary);max-height:240px;overflow-y:auto}.spark-big-score{font-size:42px;font-weight:700;color:var(--brand);text-align:center;padding:8px 0 16px}.spark-welcome-msg{text-align:center;padding:48px 20px 32px;max-width:600px;margin:0 auto}.spark-welcome-msg h3{font-size:20px;margin-bottom:8px}.progress-value.score-dash{color:var(--text-tertiary);font-weight:400;opacity:.5}.progress-value.score-zero{color:var(--error);font-weight:600}.spark-composite-fire{display:flex;align-items:center;gap:6px;padding:10px 14px;background:#ff6b351a;border-radius:var(--radius-md);margin-bottom:12px;font-size:13px;color:var(--text-secondary)}.spark-fire-num{font-size:22px;font-weight:700;color:var(--brand);line-height:1}.spark-score-exp{padding:10px 12px;background:var(--bg-elevated);border-radius:var(--radius-sm);margin-bottom:16px}.spark-length-warn{text-align:center;font-size:12px;color:var(--warning);margin-bottom:4px;padding:4px 12px;background:#ff95001a;border-radius:var(--radius-sm);max-width:500px;margin-left:auto;margin-right:auto}.spark-modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:200}.spark-modal{background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-xl);padding:var(--space-6);max-width:400px;width:90%;text-align:center;box-shadow:var(--shadow-lg)}.spark-completion-card{background:var(--bg-primary);border-radius:var(--radius-md);padding:16px;margin:16px 0}@media(max-width:767px){.spark-welcome-icon{font-size:40px}.spark-welcome-msg{padding:32px 16px 24px}.spark-welcome-msg h3{font-size:18px}.spark-mb-bubble{max-width:90%;font-size:14px}.spark-big-score{font-size:32px}.spark-modal{padding:var(--space-5)}}:root{--app-accent: var(--xiangsheng)}.line-bubble{max-width:70%;padding:12px 18px;border-radius:var(--radius-md);animation:fadeInUp .35s ease-out;position:relative}.line-bubble.dou{background:color-mix(in srgb,var(--app-accent) 6%,var(--bg-surface));border:1px solid color-mix(in srgb,var(--app-accent) 25%,transparent);border-bottom-left-radius:4px}.line-bubble.peng{background:color-mix(in srgb,var(--app-accent) 8%,var(--bg-elevated));border:1px solid var(--border);border-bottom-right-radius:4px}.line-bubble.streaming{border-style:dashed;border-color:var(--app-accent)}.phase-active{color:var(--app-accent);font-weight:600}.thinking-dots span{animation:dotPulse 1.4s infinite;opacity:0}.thinking-dots span:nth-child(1){animation-delay:0s}.thinking-dots span:nth-child(2){animation-delay:.2s}.thinking-dots span:nth-child(3){animation-delay:.4s}@keyframes dotPulse{0%,60%,to{opacity:0}30%{opacity:1}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@media(max-width:767px){.line-bubble{max-width:85%}}