/* 基础样式设置 */
:root {
    --bg-color: #ffffff;
    --text-color: #333333;
    --sidebar-bg: #f5f5f5;
    --card-bg: #ffffff;
    --border-color: #e0e0e0;
    --accent-color: #3498db;
    --hover-color: #f0f0f0;
    --transition-speed: 0.3s;
}

.dark-mode {
    --bg-color: #1a1a1a;
    --text-color: #f0f0f0;
    --sidebar-bg: #2c2c2c;
    --card-bg: #333333;
    --border-color: #444444;
    --accent-color: #4da6ff;
    --hover-color: #444444;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    padding-bottom: 80px;
}

/* 主题切换按钮 */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    background-color: var(--accent-color);
    color: white;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    z-index: 1000;
    transition: transform var(--transition-speed);
}

.theme-toggle:hover {
    transform: scale(1.1);
}

/* 信息面板样式 */
.info-panel {
    display: flex;
    gap: 15px;
    align-items: center;
    flex-shrink: 0;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.85rem;
    white-space: nowrap;
}

.info-item:last-child {
    margin-bottom: 0;
}

.info-item i {
    color: var(--accent-color);
    width: 16px;
    text-align: center;
}

#visit-count {
    font-weight: bold;
    color: var(--accent-color);
}

#current-time {
    font-family: 'Courier New', monospace;
    font-weight: 500;
    white-space: nowrap;
    min-width: fit-content;
}

/* 容器布局 */
.container {
    display: flex;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    gap: 20px;
    margin-top: 70px;
}

.sidebar {
    width: 25%;
    background-color: var(--sidebar-bg);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: relative;
}

.main-content {
    width: 50%;
    background-color: var(--sidebar-bg);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

/* 标题样式 */
.section-title {
    font-size: 1.5rem;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--accent-color);
}



/* 下载方式样式 */
.download-options {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.download-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background-color: var(--card-bg);
    border-radius: 8px;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.download-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.download-icon {
    font-size: 2rem;
    color: var(--accent-color);
    width: 50px;
    text-align: center;
}

.download-info h3 {
    margin-bottom: 5px;
}

.download-info p {
    color: #777;
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.dark-mode .download-info p {
    color: #bbb;
}

.download-link {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
}

.download-link:hover {
    text-decoration: underline;
}

/* 公告栏样式 */
.announcement-board {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.announcement-item {
    background-color: var(--card-bg);
    border-radius: 8px;
    padding: 15px;
    border-left: 4px solid var(--accent-color);
}

.announcement-item.sticky {
    border-left-color: #e74c3c;
}

.announcement-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.announcement-date {
    font-size: 0.8rem;
    color: #777;
}

.dark-mode .announcement-date {
    color: #bbb;
}

.sticky-badge {
    background-color: #e74c3c;
    color: white;
    font-size: 0.7rem;
    padding: 2px 6px;
    border-radius: 4px;
    margin-left: 10px;
}

.load-more {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 5px;
    cursor: pointer;
    margin-top: 10px;
    transition: background-color var(--transition-speed);
}

.load-more:hover {
    background-color: #2980b9;
}

.dark-mode .load-more:hover {
    background-color: #3498db;
}

/* 加群方式样式 */
.group-options {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.group-item {
    background-color: var(--card-bg);
    border-radius: 8px;
    padding: 15px;
    text-align: center;
}

.group-icon {
    font-size: 2rem;
    color: var(--accent-color);
    margin-bottom: 10px;
}

.qr-code {
    margin: 10px auto;
    width: 120px;
    height: 120px;
    overflow: hidden;
    border-radius: 5px;
}

.qr-code img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.group-link {
    display: inline-block;
    margin-top: 10px;
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
}

.group-link:hover {
    text-decoration: underline;
}

/* 底部公司信息 */
.footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--sidebar-bg);
    padding: 15px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.company-info p {
    margin: 0;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 900px) {
    .container {
        flex-direction: column;
    }
    
    .sidebar, .main-content {
        width: 100%;
    }

    .theme-toggle {
        top: 10px;
        right: 10px;
    }
}

@media (max-width: 600px) {
    .footer-content {
        flex-direction: column;
        gap: 10px;
    }

    .info-panel {
        order: 2;
    }

    .company-info p {
        order: 1;
    }
}