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

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
}

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

/* 头部导航 */
.header {
    background: var(--card-bg);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

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

.nav-menu a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-name {
    color: var(--text-primary);
    font-weight: 500;
    display: none;
}

.user-name.logged-in {
    display: block;
}

.login-btn {
    padding: 0.5rem 1rem;
    background: var(--primary-color);
    color: white;
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.875rem;
    transition: background 0.3s;
}

.login-btn:hover {
    background: var(--primary-hover);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-primary);
}

/* 主要内容区域 */
.main-content {
    padding: 2rem 0;
    min-height: calc(100vh - 200px);
}

/* 页面标题 */
.page-title {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.page-subtitle {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* 卡片样式 */
.card {
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.card-title {
    font-size: 1.25rem;
    font-weight: bold;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.card-content {
    color: var(--text-secondary);
}

/* 网格布局 */
.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: all 0.3s;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-secondary {
    background: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background: #475569;
}

/* 标签 */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.875rem;
    font-weight: 500;
}

.badge-primary {
    background: #dbeafe;
    color: var(--primary-color);
}

.badge-success {
    background: #d1fae5;
    color: var(--success-color);
}

.badge-warning {
    background: #fef3c7;
    color: var(--warning-color);
}

/* 表格样式 */
.table-wrapper {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border-radius: 8px;
    overflow: hidden;
}

thead {
    background: var(--primary-color);
    color: white;
}

th, td {
    padding: 1rem;
    text-align: left;
}

tbody tr {
    border-bottom: 1px solid var(--border-color);
}

tbody tr:hover {
    background: #f8fafc;
}

/* 搜索框 */
.search-box {
    position: relative;
    margin-bottom: 2rem;
}

.search-input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}

.search-input:focus + .search-dropdown.show {
    border-color: var(--primary-color);
}

.search-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    z-index: 1;
}

/* 搜索下拉列表 */
.search-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 8px 8px;
    box-shadow: var(--shadow-lg);
    max-height: 400px;
    overflow-y: auto;
    z-index: 1000;
    display: none;
    margin-top: -2px;
}

.search-dropdown.show {
    display: block;
}

.search-dropdown-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    cursor: pointer;
    transition: background 0.2s;
    border-bottom: 1px solid var(--border-color);
    text-decoration: none;
    color: var(--text-primary);
}

.search-dropdown-item:last-child {
    border-bottom: none;
}

.search-dropdown-item:hover,
.search-dropdown-item.active {
    background: var(--bg-color);
}

.search-dropdown-item.active {
    background: #e0e7ff;
    border-left: 3px solid var(--primary-color);
}

.search-dropdown-item-logo {
    width: 50px;
    height: 50px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.search-dropdown-item-info {
    flex: 1;
    min-width: 0;
}

.search-dropdown-item-name {
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.search-dropdown-item-category {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.search-dropdown-empty {
    padding: 2rem;
    text-align: center;
    color: var(--text-secondary);
}

/* 页脚 */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 2rem 0;
    margin-top: 4rem;
    text-align: center;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .grid-4 {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 60px;
        left: -100%;
        flex-direction: column;
        background: var(--card-bg);
        width: 100%;
        padding: 1rem;
        box-shadow: var(--shadow-lg);
        transition: left 0.3s;
        gap: 1rem;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-user {
        flex-direction: column;
        width: 100%;
    }

    .user-name {
        display: block !important;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .page-title {
        font-size: 1.5rem;
    }

    .container {
        padding: 0 15px;
    }
}

@media (max-width: 480px) {
    .card {
        padding: 1rem;
    }

    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }

    .search-dropdown-item {
        padding: 0.75rem;
    }

    .search-dropdown-item-logo {
        width: 40px;
        height: 40px;
        font-size: 1.25rem;
    }

    .search-dropdown-item-name {
        font-size: 0.9rem;
    }

    .search-dropdown-item-category {
        font-size: 0.8rem;
    }
}

/* 硬件分类卡片 */
.hardware-category {
    text-align: center;
    padding: 2rem;
    border-radius: 12px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    display: block;
    transition: transform 0.3s, box-shadow 0.3s;
}

.hardware-category:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

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

.hardware-category-title {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.hardware-category-desc {
    opacity: 0.9;
    font-size: 0.9rem;
}

/* 硬件详情页样式 */
.hardware-header {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.hardware-image {
    flex: 0 0 300px;
    max-width: 100%;
}

.hardware-image img {
    width: 100%;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
}

.hardware-info {
    flex: 1;
    min-width: 300px;
}

.hardware-specs {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-top: 1.5rem;
}

.spec-item {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem;
    background: var(--bg-color);
    border-radius: 6px;
}

.spec-label {
    color: var(--text-secondary);
    font-weight: 500;
}

.spec-value {
    color: var(--text-primary);
    font-weight: bold;
}

/* 排行榜样式 */
.ranking-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--card-bg);
    border-radius: 8px;
    margin-bottom: 1rem;
    transition: transform 0.3s;
}

.ranking-item:hover {
    transform: translateX(5px);
}

.ranking-number {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    min-width: 40px;
    text-align: center;
}

.ranking-number.top1 {
    color: #fbbf24;
}

.ranking-number.top2 {
    color: #94a3b8;
}

.ranking-number.top3 {
    color: #f97316;
}

.ranking-content {
    flex: 1;
}

.ranking-score {
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--primary-color);
}

/* 加载动画 */
.loading {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}