:root {
    --primary-color: #4285f4;
    --secondary-color: #34a853;
    --accent-color: #ea4335;
    --text-color: #333;
    --light-text: #777;
    --bg-color: #f9f9f9;
    --card-bg: #fff;
    --border-color: #e0e0e0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px;
}

/* 头部样式 */
.header {
    text-align: center;
    padding: 20px 0;
    position: relative;
}

.logo {
    font-size: 2.5rem;
    font-weight: bold;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 10px;
}

.info-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding: 10px 15px;
    background-color: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.datetime, .weather {
    display: flex;
    align-items: center;
    font-size: 0.9rem;
    color: var(--light-text);
}

.weather-icon {
    margin-left: 8px;
    font-size: 1.2rem;
}

.theme-switcher {
    display: flex;
    align-items: center;
}

.theme-btn {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    margin: 0 5px;
    cursor: pointer;
    border: 2px solid transparent;
}

.theme-btn.active {
    border-color: var(--primary-color);
}

.theme-btn.light {
    background: linear-gradient(135deg, #f5f5f5, #e0e0e0);
}

.theme-btn.dark {
    background: linear-gradient(135deg, #333, #555);
}

.theme-btn.blue {
    background: linear-gradient(135deg, #4285f4, #34a853);
}

.theme-btn.pink {
    background: linear-gradient(135deg, #ff6b6b, #ff8e8e);
}

/* 搜索框样式 */
.search-container {
    margin: 30px auto;
    max-width: 800px;
    position: relative;
}

.search-engine-tabs {
    display: flex;
    margin-bottom: 10px;
    overflow-x: auto;
    padding-bottom: 5px;
}

.search-engine-tabs::-webkit-scrollbar {
    height: 4px;
}

.search-engine-tabs::-webkit-scrollbar-thumb {
    background-color: rgba(0,0,0,0.1);
    border-radius: 2px;
}

.engine-tab {
    padding: 8px 15px;
    margin-right: 5px;
    background-color: var(--card-bg);
    border-radius: 20px;
    font-size: 0.85rem;
    cursor: pointer;
    white-space: nowrap;
    border: 1px solid var(--border-color);
    transition: all 0.2s;
}

.engine-tab:hover {
    background-color: #f0f0f0;
}

.engine-tab.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.search-box {
    display: flex;
    width: 100%;
    border-radius: 30px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.search-input {
    flex: 1;
    padding: 15px 20px;
    border: none;
    font-size: 1rem;
    outline: none;
}

.search-btn {
    padding: 0 25px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.2s;
}

.search-btn:hover {
    background-color: #3367d6;
}

/* 标签分类样式 */
.tag-filter {
    margin: 30px 0 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag-btn {
    padding: 8px 15px;
    background-color: var(--card-bg);
    border-radius: 20px;
    font-size: 0.85rem;
    cursor: pointer;
    border: 1px solid var(--border-color);
    transition: all 0.2s;
}

.tag-btn:hover {
    background-color: #f0f0f0;
}

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

/* 网站卡片样式 */
.nav-sections {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.nav-section {
    background-color: var(--card-bg);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.section-title {
    font-size: 1.2rem;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    color: var(--primary-color);
    display: flex;
    align-items: center;
}

.section-title i {
    margin-right: 8px;
}

.site-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 12px;
}

.site-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.site-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--text-color);
    font-size: 0.85rem;
    transition: color 0.2s;
    width: 100%;
    padding: 8px 5px;
    border-radius: 6px;
}

.site-link:hover {
    color: var(--primary-color);
    background-color: rgba(66, 133, 244, 0.1);
}

.site-icon {
    width: 40px;
    height: 40px;
    margin-bottom: 5px;
    border-radius: 50%;
    background-color: #f0f0f0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--primary-color);
}

/* 弹窗样式 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.7);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: var(--card-bg);
    border-radius: 10px;
    width: 90%;
    max-width: 500px;
    padding: 25px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.2);
    position: relative;
    animation: modalFadeIn 0.3s;
}

@keyframes modalFadeIn {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

.modal-title {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.modal-desc {
    margin-bottom: 20px;
    line-height: 1.6;
}

.modal-timer {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    color: var(--light-text);
    font-size: 0.9rem;
}

.timer-bar {
    flex: 1;
    height: 4px;
    background-color: #eee;
    border-radius: 2px;
    margin: 0 10px;
    overflow: hidden;
}

.timer-progress {
    height: 100%;
    width: 0%;
    background-color: var(--primary-color);
    transition: width 1s linear;
}

.modal-btns {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

.modal-btn {
    padding: 8px 15px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.modal-btn.primary {
    background-color: var(--primary-color);
    color: white;
    border: none;
}

.modal-btn.primary:hover {
    background-color: #3367d6;
}

.modal-btn.secondary {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
}

.modal-btn.secondary:hover {
    background-color: #f5f5f5;
}

.close-modal {
    position: absolute;
    top: 15px;
    right: 15px;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--light-text);
}

/* 页脚样式 */
.footer {
    text-align: center;
    padding: 20px 0;
    color: var(--light-text);
    font-size: 0.85rem;
    border-top: 1px solid var(--border-color);
    margin-top: 30px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .logo {
        font-size: 2rem;
    }
    
    .search-container {
        margin: 20px auto;
    }
    
    .search-box {
        flex-direction: column;
        border-radius: 10px;
    }
    
    .search-input {
        padding: 12px 15px;
    }
    
    .search-btn {
        padding: 12px;
    }
    
    .nav-sections {
        grid-template-columns: 1fr;
    }
    
    .info-bar {
        flex-direction: column;
        gap: 10px;
        align-items: flex-start;
    }
}