/* ============================================================================
   首页样式 - 现代化设计
   ============================================================================= */

/* Hero 大横幅 */
.hero-banner {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 24px;
    padding: 4rem 3rem;
    margin-bottom: 3rem;
    color: white;
    text-align: center;
    box-shadow: 0 20px 60px rgba(102, 126, 234, 0.3);
    position: relative;
    overflow: hidden;
}

.hero-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: float 20s infinite ease-in-out;
}

.hero-banner::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -5%;
    width: 400px;
    height: 400px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    animation: float 15s infinite ease-in-out reverse;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-30px) rotate(180deg); }
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: white;
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    letter-spacing: 1px;
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.95;
    margin-bottom: 2.5rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-hero-primary {
    background: white;
    color: #667eea;
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.btn-hero-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.btn-hero-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    border: 2px solid white;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.btn-hero-secondary:hover {
    background: white;
    color: #667eea;
    transform: translateY(-2px);
}

/* 现代化统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.stat-card-modern {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.stat-card-modern:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.stat-icon {
    width: 70px;
    height: 70px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    flex-shrink: 0;
}

.stat-info h3 {
    font-size: 2.5rem;
    font-weight: 800;
    color: #2c3e50;
    margin: 0;
    line-height: 1;
}

.stat-info p {
    font-size: 0.95rem;
    color: #7f8c8d;
    margin: 0.5rem 0 0 0;
}

/* 首页内容区块 */
.home-section {
    margin: 4rem 0;
}

.section-header-modern {
    margin-bottom: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.section-header-modern h2 {
    font-size: 2rem;
    font-weight: 700;
    color: #2c3e50;
    margin: 0;
}

.section-header-modern p {
    font-size: 1rem;
    color: #7f8c8d;
    margin: 0.5rem 0 0 0;
}

/* 首页卡片网格 */
.home-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}

/* 竞拍卡片 */
.home-auction-card,
.home-race-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
}

.home-auction-card:hover,
.home-race-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.card-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    color: white;
    font-size: 0.85rem;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    z-index: 1;
}

.card-content {
    padding: 1.5rem;
}

.card-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: #2c3e50;
    margin: 0 0 1rem 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.card-meta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    font-size: 0.9rem;
    color: #7f8c8d;
    margin-bottom: 1rem;
}

.price-section {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 1.5rem;
    border-radius: 12px;
    margin: 1rem 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.price-item {
    display: flex;
    flex-direction: column;
}

.price-label {
    font-size: 0.85rem;
    color: #7f8c8d;
    margin-bottom: 0.3rem;
}

.price-value {
    font-size: 1.8rem;
    font-weight: 800;
    color: #e74c3c;
}

.price-value-small {
    font-size: 1.2rem;
    font-weight: 600;
    color: #95a5a6;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: #7f8c8d;
    padding-top: 1rem;
    border-top: 1px solid #ecf0f1;
}

.time-left {
    color: #e67e22;
    font-weight: 600;
}

.bid-count {
    color: #3498db;
    font-weight: 600;
}

.race-location {
    font-size: 0.95rem;
    color: #7f8c8d;
    margin: 0.5rem 0 1rem 0;
}

.registration-info {
    color: #27ae60;
    font-weight: 600;
}

/* 平台特色 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature-card {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 1rem;
}

.feature-card p {
    font-size: 0.95rem;
    color: #7f8c8d;
    line-height: 1.6;
    margin: 0;
}

.loading-card {
    grid-column: 1/-1;
    text-align: center;
    padding: 3rem;
    color: #999;
    background: white;
    border-radius: 16px;
}

.btn-link {
    background: none;
    border: none;
    color: #667eea;
    font-weight: 600;
    cursor: pointer;
    padding: 0.5rem 1rem;
    transition: all 0.3s ease;
}

.btn-link:hover {
    color: #764ba2;
    transform: translateX(5px);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .home-cards-grid {
        grid-template-columns: 1fr;
    }
    
    .section-header-modern {
        flex-direction: column;
        align-items: flex-start;
    }
}