/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部样式 */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #667eea;
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 6px;
}

.nav-menu a:hover {
    color: #667eea;
    background: rgba(102, 126, 234, 0.1);
}

/* 头部操作区域 */
.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.cpu-link {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.cpu-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

/* 主要内容区域 */
.main-content {
    padding: 2rem 0;
}

/* 英雄区域 */
.hero-section {
    text-align: center;
    padding: 3rem 0;
    color: white;
}

.hero-section h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.update-time {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    display: inline-block;
    backdrop-filter: blur(10px);
}

/* 分类导航 */
.category-nav {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 1rem;
    margin: 2rem 0;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.category-nav ul {
    display: flex;
    justify-content: center;
    gap: 2rem;
    list-style: none;
    flex-wrap: wrap;
}

.nav-link {
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.nav-link:hover,
.nav-link.active {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

/* 主板表格样式 */
.motherboard-section {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 2rem;
    margin: 2rem 0;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.motherboard-section h2 {
    color: #333;
    margin-bottom: 1.5rem;
    font-size: 2rem;
}

.filter-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.filter-controls select,
.filter-controls input {
    padding: 0.75rem;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    background: white;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.filter-controls select:focus,
.filter-controls input:focus {
    outline: none;
    border-color: #667eea;
}

#search-input {
    min-width: 200px;
    flex: 1;
}

.motherboard-table-container {
    overflow-x: auto;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.motherboard-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

.motherboard-table th,
.motherboard-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #e1e5e9;
}

.motherboard-table th {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    font-weight: 600;
    position: sticky;
    top: 0;
}

.motherboard-table tr:hover {
    background: #f8f9fa;
}

.rank {
    font-weight: bold;
    color: #667eea;
}

.rank.top-3 {
    background: linear-gradient(135deg, #ffd700, #ffed4e);
    color: #333;
    padding: 0.25rem 0.5rem;
    border-radius: 15px;
    font-size: 0.9rem;
}

.tier-s {
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 15px;
    font-size: 0.9rem;
    font-weight: bold;
}

.tier-a {
    background: linear-gradient(135deg, #feca57, #ff9ff3);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 15px;
    font-size: 0.9rem;
    font-weight: bold;
}

.tier-b {
    background: linear-gradient(135deg, #48dbfb, #0abde3);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 15px;
    font-size: 0.9rem;
    font-weight: bold;
}

.tier-c {
    background: linear-gradient(135deg, #1dd1a1, #10ac84);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 15px;
    font-size: 0.9rem;
    font-weight: bold;
}

.tier-d {
    background: linear-gradient(135deg, #a4b0be, #747d8c);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 15px;
    font-size: 0.9rem;
    font-weight: bold;
}

.price {
    color: #dc3545;
    font-weight: 500;
}

.brand-intel {
    color: #0071c5;
    font-weight: 500;
}

.brand-amd {
    color: #ed1c24;
    font-weight: 500;
}

.features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
}

.feature-tag {
    background: #e3f2fd;
    color: #1976d2;
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-size: 0.75rem;
    white-space: nowrap;
}

/* 页脚样式 */
.footer {
    background: rgba(52, 58, 64, 0.95);
    color: white;
    padding: 3rem 0 1rem;
    margin-top: 4rem;
    backdrop-filter: blur(10px);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
    color: #f8f9fa;
}

.footer-section ul {
    list-style: none;
}

.footer-section a {
    color: #adb5bd;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #667eea;
}

.footer-bottom {
    border-top: 1px solid #495057;
    padding-top: 1rem;
    text-align: center;
}

.footer-links {
    margin-bottom: 1rem;
}

.footer-links a {
    color: #adb5bd;
    text-decoration: none;
    margin: 0 0.5rem;
}

.separator {
    color: #6c757d;
}

/* 相关链接样式 */
.related-links {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 2rem;
    margin: 2rem 0;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.related-links h3 {
    color: #333;
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    text-align: center;
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.link-card {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    padding: 1.5rem;
    border-radius: 12px;
    text-decoration: none;
    color: #333;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.link-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-color: #667eea;
}

.link-card h4 {
    color: #495057;
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.link-card p {
    color: #6c757d;
    font-size: 0.9rem;
    margin: 0;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-section h1 {
        font-size: 2rem;
    }
    
    .category-nav ul {
        flex-direction: column;
        gap: 1rem;
    }
    
    .filter-controls {
        flex-direction: column;
    }
    
    .motherboard-table th,
    .motherboard-table td {
        padding: 0.5rem;
        font-size: 0.9rem;
    }
    
    .features {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .hero-section {
        padding: 2rem 0;
    }
    
    .hero-section h1 {
        font-size: 1.8rem;
    }
    
    .motherboard-section {
        padding: 1.5rem;
    }
    
    .motherboard-table th,
    .motherboard-table td {
        padding: 0.4rem;
        font-size: 0.8rem;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.motherboard-section {
    animation: fadeInUp 0.6s ease-out;
}

/* 加载动画 */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 工具提示 */
.tooltip {
    position: relative;
    cursor: help;
}

.tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    background: #333;
    color: white;
    padding: 0.5rem;
    border-radius: 4px;
    font-size: 0.8rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}

.tooltip:hover::after {
    opacity: 1;
    visibility: visible;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #5a6fd8, #6a4190);
}

/* 高亮搜索结果 */
.highlight {
    background-color: #fff3cd !important;
    border: 2px solid #ffc107 !important;
}

/* 隐藏元素 */
.hidden {
    display: none !important;
}