:root.trends-keywords {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #a5b4fc;
    --accent: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --gradient-main: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --gradient-2: linear-gradient(135deg, #a855f7 0%, #c084fc 100%);
    --text-primary: #1e1b4b;
    --primary-bg-1: rgba(99, 102, 241, 0.03);
    --primary-bg-2: rgba(168, 85, 247, 0.03);
    --hero-filter: drop-shadow(0 4px 20px rgba(99, 102, 241, 0.2));
    --focus-shadow: 0 25px 50px rgba(99, 102, 241, 0.12), inset 0 0 0 2px rgba(99, 102, 241, 0.08);
    
    --hot: #ef4444;
    --warm: #f59e0b;
    --cold: #64748b;
}

.trends-keywords .hero-section {
    padding: 60px 20px 20px;
}

.race-section {
    padding: 20px 20px 40px;
    background: #ffffff;
}

.race-container {
    max-width: 1200px;
    margin: 0 auto;
    background: var(--white);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 16px;
    padding: 32px;
    box-shadow: var(--shadow-lg);
}

/* ===== Tab 样式 ===== */
.race-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    border-bottom: 1px solid #e2e8f0;
    padding-bottom: 16px;
}

.race-tab {
    padding: 12px 24px;
    background: transparent;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--gray);
    cursor: pointer;
    transition: all 0.2s;
}

.race-tab:hover {
    background: #f8fafc;
    color: var(--dark);
}

.race-tab.active {
    background: var(--gradient-main);
    border-color: transparent;
    color: white;
}

/* ===== Panel 样式 ===== */
.race-panel {
    display: none;
}

.race-panel.active {
    display: block;
}

.race-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    flex-wrap: wrap;
    gap: 12px;
}

.race-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--dark);
}

.live-dot {
    width: 10px;
    height: 10px;
    background: var(--hot);
    border-radius: 50%;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}

.race-subtitle {
    font-size: 0.85rem;
    font-weight: 400;
    color: var(--gray);
    margin-left: 8px;
}

.race-legend {
    display: flex;
    gap: 16px;
    font-size: 0.85rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--gray);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 3px;
}

.dot-hot {
    background: #dc2626;
}

.dot-warm {
    background: #f59e0b;
}

.dot-cold {
    background: #64748b;
}

/* ===== Loading & Error ===== */
.race-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 60px 20px;
    color: var(--gray);
}

.race-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 40px 20px;
    color: var(--gray);
}

.race-error .error-icon {
    font-size: 2rem;
}

.race-error .error-msg {
    font-size: 0.9rem;
}

.retry-btn {
    background: var(--gradient-main);
    color: white;
    border: none;
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.retry-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
}

/* ===== Tracks 样式 ===== */
.race-tracks {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.race-track {
    display: flex;
    align-items: center;
    gap: 12px;
}

.racer-rank {
    width: 32px;
    height: 32px;
    background: var(--light-gray);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--gray);
    flex-shrink: 0;
}

.racer-rank.top-3 {
    background: var(--gradient-main);
    color: white;
}

.racer-name {
    width: 200px;
    font-family: 'Monaco', 'Consolas', monospace;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--dark);
    flex-shrink: 0;
    word-break: break-all;
    line-height: 1.3;
}

.racer-name.masked {
    color: var(--gray);
}

.racer-name.clickable {
    cursor: pointer;
}

.racer-name.clickable:hover {
    color: var(--primary);
    text-decoration: underline;
}

.racer-count {
    min-width: 70px;
    text-align: right;
    font-size: 1rem;
    color: var(--dark);
    font-weight: 700;
}

.track {
    flex: 1;
    height: 40px;
    border-radius: 10px;
    position: relative;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    border-radius: 10px;
    position: absolute;
    left: 0;
    top: 0;
    transition: width 0.8s ease-out;
}

.track-hot .progress-bar {
    background: #ef4444;
}

.track-warm .progress-bar {
    background: #f59e0b;
}

/* ===== CTA ===== */
.race-cta {
    text-align: center;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--light-gray);
}

.cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--gradient-main);
    color: white;
    padding: 14px 32px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
}

/* ===== Upgrade Section ===== */
.upgrade-section {
    padding: 40px 20px;
    background: #ffffff;
}

.upgrade-card {
    max-width: 1200px;
    margin: 0 auto;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    padding: 40px;
    text-align: center;
}

.upgrade-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 24px;
}

.upgrade-tiers {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.tier-item {
    background: white;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 20px;
    text-align: left;
    transition: transform 0.2s, box-shadow 0.2s;
}

.tier-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
}

.tier-item.current {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
}

.tier-name {
    display: block;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 6px;
}

.tier-desc {
    font-size: 0.85rem;
    color: var(--gray);
    line-height: 1.5;
}

.upgrade-btn {
    display: inline-block;
    background: var(--gradient-main);
    color: white;
    padding: 14px 36px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

.upgrade-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
}

/* ===== Tooltip ===== */
.track-tooltip {
    position: absolute;
    display: none;
    background: rgba(0, 0, 0, 0.85);
    color: white;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    pointer-events: none;
    z-index: 1000;
    white-space: nowrap;
}

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-main);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
    z-index: 100;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .race-container {
        padding: 20px;
    }
    
    .race-tabs {
        flex-wrap: wrap;
    }
    
    .race-tab {
        padding: 10px 16px;
        font-size: 0.85rem;
    }
    
    .race-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .race-track {
        gap: 8px;
    }
    
    .racer-name {
        width: 120px;
        font-size: 0.9rem;
    }
    
    .racer-count {
        min-width: 50px;
        font-size: 0.9rem;
    }
    
    .upgrade-tiers {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .race-tabs {
        gap: 6px;
    }
    
    .race-tab {
        padding: 8px 12px;
        font-size: 0.8rem;
        flex: 1;
        text-align: center;
    }
    
    .racer-rank {
        width: 28px;
        height: 28px;
        font-size: 0.8rem;
    }
    
    .racer-name {
        width: 90px;
        font-size: 0.85rem;
    }
    
    .track {
        height: 34px;
    }
}

.track-cold .progress-bar {
    background: #64748b;
}

.layer-30d {
    background: #fecaca;
}

.layer-7d {
    height: 100%;
    border-radius: 10px;
    background: #f87171;
}

.layer-48h {
    height: 100%;
    border-radius: 10px;
    background: #dc2626;
}

.track-active .progress-bar,
.track-active .layer-30d {
    background: #fef08a;
}

.track-active .layer-7d {
    background: #facc15;
}

.track-active .layer-48h {
    background: #ca8a04;
}

.track-cold .layer-30d {
    background: #e2e8f0;
}

.track-cold .layer-7d {
    background: #94a3b8;
}

.track-cold .layer-48h {
    background: #475569;
}

.no-data {
    text-align: center;
    padding: 40px;
    color: var(--gray);
    font-size: 0.95rem;
}