/* CSS变量定义 - 方便后续调整 */
:root {
    /* 颜色系数 */
    --primary-blue: #2196F3;
    --primary-red: #f44336;
    --background-color: #f5f5f5;
    --white: #ffffff;
    --text-dark: #333333;
    --text-light: #666666;
    --border-color: #e0e0e0;
    --google-color: #4285f4;
    --bing-color: #0078d4;
    --baidu-color: #2932e1;
    
    /* 字体系数 */
    --font-family-primary: 'Microsoft YaHei', Arial, sans-serif;
    --font-size-large: 18px;
    --font-size-medium: 16px;
    --font-size-small: 14px;
    --font-size-tiny: 12px;
    
    /* 尺寸系数 */
    --search-container-height: 120px;
    --search-box-height: 45px;
    --button-width: 80px;
    --site-icon-size: 60px;
    --border-radius: 8px;
    --spacing-small: 8px;
    --spacing-medium: 16px;
    --spacing-large: 24px;
    
    /* 位置系数 */
    --search-container-padding: 20px;
    --navigation-margin-top: 140px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family-primary);
    background-color: var(--background-color);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 搜索容器 */
.search-container {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    padding: var(--search-container-padding);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    height: var(--search-container-height);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

/* 搜索引擎选择 */
.engine-selection {
    display: flex;
    gap: var(--spacing-large);
    margin-bottom: var(--spacing-small);
}

.engine-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-small);
    cursor: pointer;
    font-size: var(--font-size-small);
}

.google-text { color: var(--google-color); font-weight: bold; }
.bing-text { color: var(--bing-color); font-weight: bold; }
.baidu-text { color: var(--baidu-color); font-weight: bold; }

/* 搜索框 */
.search-box {
    display: flex;
    align-items: center;
    gap: 0;
    margin-bottom: var(--spacing-small);
    width: 100%;
    max-width: 600px;
}

.ai-search-btn {
    background: var(--primary-blue);
    color: var(--white);
    border: none;
    padding: 0 var(--spacing-medium);
    height: var(--search-box-height);
    border-radius: var(--border-radius) 0 0 var(--border-radius);
    cursor: pointer;
    font-size: var(--font-size-small);
    font-weight: bold;
    width: var(--button-width);
    transition: background-color 0.3s;
}

.ai-search-btn:hover {
    background: #1976D2;
}

.search-input {
    flex: 1;
    height: var(--search-box-height);
    border: 2px solid var(--border-color);
    border-left: none;
    border-right: none;
    padding: 0 var(--spacing-medium);
    font-size: var(--font-size-medium);
    outline: none;
}

.search-input:focus {
    border-color: var(--primary-blue);
}

.traditional-search-btn {
    background: var(--primary-red);
    color: var(--white);
    border: none;
    padding: 0 var(--spacing-medium);
    height: var(--search-box-height);
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    cursor: pointer;
    font-size: var(--font-size-small);
    font-weight: bold;
    width: var(--button-width);
    transition: background-color 0.3s;
}

.traditional-search-btn:hover {
    background: #d32f2f;
}

/* AI引擎选择 */
.ai-engine-selection {
    display: flex;
    gap: var(--spacing-medium);
    flex-wrap: wrap;
    justify-content: center;
}

.ai-engine-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-small);
    cursor: pointer;
    font-size: var(--font-size-small);
}

.chatgpt-text, .manus-text, .grok-text, .doubao-text, .kimi-text {
    color: var(--text-dark);
    font-weight: 500;
}

/* 导航容器 */
.navigation-container {
    margin-top: var(--navigation-margin-top);
    padding: var(--spacing-large);
    transition: transform 0.3s ease;
}

.navigation-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-large);
    background: var(--white);
    padding: var(--spacing-medium);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.nav-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-medium);
}

.title-text {
    font-size: var(--font-size-large);
    font-weight: bold;
    color: var(--text-dark);
}

.visit-count {
    font-size: var(--font-size-small);
    color: var(--text-light);
    background: var(--primary-blue);
    color: var(--white);
    padding: 4px var(--spacing-small);
    border-radius: var(--border-radius);
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-medium);
}

.show-categories-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-small);
    cursor: pointer;
    font-size: var(--font-size-small);
}

.show-categories-text {
    color: var(--text-dark);
}

.lock-btn {
    background: var(--text-light);
    color: var(--white);
    border: none;
    padding: var(--spacing-small) var(--spacing-medium);
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: var(--font-size-small);
    transition: background-color 0.3s;
}

.lock-btn.unlocked {
    background: var(--primary-red);
}

.lock-btn:hover {
    opacity: 0.8;
}

/* 分类容器 */
.categories-container {
    display: grid;
    gap: var(--spacing-large);
}

.category {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: var(--spacing-medium);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.category:hover {
    transform: translateY(-2px);
}

.category-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-medium);
    padding-bottom: var(--spacing-small);
    border-bottom: 1px solid var(--border-color);
}

.category-title {
    font-size: var(--font-size-medium);
    font-weight: bold;
    color: var(--text-dark);
}

.category-controls {
    display: flex;
    gap: var(--spacing-small);
}

.category-controls button {
    background: var(--primary-blue);
    color: var(--white);
    border: none;
    padding: 4px var(--spacing-small);
    border-radius: 4px;
    cursor: pointer;
    font-size: var(--font-size-tiny);
    transition: background-color 0.3s;
}

.category-controls button:hover {
    background: #1976D2;
}

.category-controls .delete-btn {
    background: var(--primary-red);
}

.category-controls .delete-btn:hover {
    background: #d32f2f;
}

/* 网站网格 */
.sites-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(var(--site-icon-size), 1fr));
    gap: var(--spacing-medium);
}

.site-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-small);
    border-radius: var(--border-radius);
    background: #f8f9fa;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    color: inherit;
    position: relative;
}

.site-item:hover {
    background: #e3f2fd;
    transform: translateY(-2px);
}

.site-icon {
    width: 40px;
    height: 40px;
    border-radius: 6px;
    background: var(--primary-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: bold;
    font-size: var(--font-size-medium);
    margin-bottom: var(--spacing-small);
    overflow: hidden;
}

.site-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.site-name {
    font-size: var(--font-size-tiny);
    text-align: center;
    color: var(--text-dark);
    line-height: 1.2;
    word-break: break-all;
}

.site-controls {
    position: absolute;
    top: -5px;
    right: -5px;
    display: none;
    gap: 2px;
}

.site-item:hover .site-controls {
    display: flex;
}

.site-controls button {
    width: 18px;
    height: 18px;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 10px;
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
}

.edit-site-btn {
    background: var(--primary-blue);
}

.delete-site-btn {
    background: var(--primary-red);
}

/* 无分类模式 */
.no-categories .sites-grid {
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
}

.no-categories .category {
    background: transparent;
    box-shadow: none;
    padding: 0;
}

.no-categories .category-header {
    display: none;
}

/* 页脚信息 */
.footer-info {
    text-align: center;
    margin-top: var(--spacing-large);
    padding: var(--spacing-medium);
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.footer-text {
    font-size: var(--font-size-small);
    color: var(--text-light);
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: var(--white);
    margin: 15% auto;
    padding: var(--spacing-large);
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 400px;
    text-align: center;
}

.modal-content h3 {
    margin-bottom: var(--spacing-medium);
    color: var(--text-dark);
    font-size: var(--font-size-medium);
}

.modal-content input, .modal-content select {
    width: 100%;
    padding: var(--spacing-small);
    margin-bottom: var(--spacing-small);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: var(--font-size-small);
}

.modal-buttons {
    display: flex;
    gap: var(--spacing-small);
    justify-content: center;
    flex-wrap: wrap;
}

.modal-buttons button {
    padding: var(--spacing-small) var(--spacing-medium);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: var(--font-size-small);
    transition: background-color 0.3s;
}

.modal-buttons button:first-child {
    background: var(--primary-blue);
    color: var(--white);
}

.modal-buttons button:not(:first-child) {
    background: var(--text-light);
    color: var(--white);
}

.modal-buttons button:hover {
    opacity: 0.8;
}

/* 锁定状态 */
.locked .category-controls,
.locked .site-controls,
.locked .add-category-btn {
    display: none !important;
}

/* 响应式设计 */
@media (max-width: 768px) {
    :root {
        --search-container-height: 140px;
        --navigation-margin-top: 160px;
        --search-container-padding: 15px;
        --spacing-large: 16px;
        --spacing-medium: 12px;
        --button-width: 70px;
    }
    
    .engine-selection {
        gap: var(--spacing-medium);
    }
    
    .ai-engine-selection {
        gap: var(--spacing-small);
    }
    
    .navigation-header {
        flex-direction: column;
        gap: var(--spacing-small);
        align-items: stretch;
    }
    
    .nav-title {
        justify-content: center;
    }
    
    .nav-controls {
        justify-content: center;
    }
    
    .sites-grid {
        grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
        gap: var(--spacing-small);
    }
    
    .site-icon {
        width: 35px;
        height: 35px;
        font-size: var(--font-size-small);
    }
}

@media (max-width: 480px) {
    :root {
        --search-container-height: 160px;
        --navigation-margin-top: 180px;
        --button-width: 60px;
        --font-size-small: 12px;
        --font-size-tiny: 10px;
    }
    
    .engine-selection {
        flex-direction: column;
        gap: var(--spacing-small);
        align-items: center;
    }
    
    .ai-engine-selection {
        justify-content: center;
        gap: 6px;
    }
    
    .sites-grid {
        grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    }
}

/* 滚动效果 */
.navigation-hidden {
    transform: translateY(-50px);
    opacity: 0.7;
}

/* 拖拽效果 */
.dragging {
    opacity: 0.5;
    transform: scale(0.95);
}

.drag-over {
    background-color: #e3f2fd !important;
}

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.category, .site-item {
    animation: fadeIn 0.3s ease;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}