/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft Yahei", sans-serif;
}

body {
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

.container {
    display: flex;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
}

/* 左侧侧边栏 */
.sidebar {
    width: 200px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    padding: 20px 0;
    margin-right: 20px;
}

.sidebar-title {
    font-size: 18px;
    font-weight: bold;
    text-align: center;
    padding: 0 20px 15px;
    border-bottom: 1px solid #eee;
    margin-bottom: 10px;
}

.sidebar-nav {
    list-style: none;
}

.nav-item {
    display: block;
    padding: 12px 20px;
    color: #666;
    text-decoration: none;
    transition: all 0.3s;
    cursor: pointer;
}

.nav-item:hover, .nav-item.active {
    background-color: #e8f4f8;
    color: #1989fa;
}

/* 右侧主内容 */
.main-content {
    flex: 1;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    padding: 30px;
}

.content-section {
    display: block;
}

.hidden {
    display: none;
}

.section-title {
    font-size: 24px;
    margin-bottom: 20px;
    color: #333;
    border-bottom: 2px solid #1989fa;
    padding-bottom: 10px;
}

/* 友情链接样式 */
.link-section {
    margin-bottom: 30px;
}

.link-type-title {
    font-size: 18px;
    margin: 15px 0;
    color: #555;
}

/* Logo友联样式 */
.logo-links {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.logo-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: #333;
    width: 120px;
}

.logo-link img {
    width: 120px;  /* 强制统一尺寸 */
    height: 60px;  /* 强制统一尺寸 */
    object-fit: contain;  /* 保持图片比例，不拉伸 */
    border: 1px solid #eee;
    border-radius: 4px;
    margin-bottom: 5px;
}

.logo-link-text {
    width: 100%;
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;  /* 最多显示6字宽度 */
    font-size: 14px;
    padding: 0 2px; /* 少量内边距，优化显示 */
}

/* 文字友联样式 */
.text-links {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.text-link {
    display: inline-block;
    text-decoration: none;
    color: #333;
    background-color: #f5f5f5;
    padding: 8px 15px;
    border-radius: 4px;
    transition: all 0.3s;
}

.text-link:hover {
    background-color: #e8f4f8;
    color: #1989fa;
}

.text-link-text {
    display: inline-block;
    width: 80px;  /* 固定6字宽度（约80px） */
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    text-align: center;
}

/* 友联说明样式 */
.rules-content {
    line-height: 1.8;
}

.rules-content h3 {
    margin: 15px 0 10px;
    color: #444;
}

.rules-content ul {
    margin-left: 20px;
    margin-bottom: 15px;
}

/* 申请表单样式 */
.apply-form {
    max-width: 600px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

.form-group textarea {
    resize: vertical;
}

.submit-btn {
    background-color: #1989fa;
    color: #fff;
    border: none;
    padding: 12px 30px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.3s;
}

.submit-btn:hover {
    background-color: #0e75d8;
}

.logo-link-group.hidden {
    display: none;
}

.form-message {
    margin-top: 15px;
    padding: 10px;
    border-radius: 4px;
    display: none;
}

.form-message.success {
    display: block;
    background-color: #f0f9ff;
    color: #13ce66;
}

.form-message.error {
    display: block;
    background-color: #fff2f2;
    color: #ff4949;
}

/* Logo友联悬停优化 */
.logo-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: #333;
    width: 120px;
    transition: all 0.3s; /* 添加入场动画 */
}

.logo-link:hover {
    transform: translateY(-2px); /* 轻微上浮，增强交互感 */
    color: #1989fa; /* 文字变色 */
}

.logo-link img:hover {
    border-color: #1989fa; /* 图片边框变色 */
    box-shadow: 0 2px 8px rgba(25, 137, 250, 0.2); /* 添阴影 */
}

/* 文字友联悬停优化 */
.text-link {
    display: inline-block;
    text-decoration: none;
    color: #333;
    background-color: #f5f5f5;
    padding: 8px 0;
    border-radius: 4px;
    transition: all 0.3s;
    width: 90px;
    position: relative; /* 为自定义提示预留（可选） */
}

.text-link:hover {
    background-color: #e8f4f8;
    color: #1989fa;
    box-shadow: 0 2px 8px rgba(25, 137, 250, 0.15); /* 添阴影 */
}

/* （可选）自定义title提示样式（如需替换原生提示） */
/* 若不需要自定义，仅保留原生title即可，以下为扩展方案 */
.tooltip {
    position: absolute;
    bottom: 120%;
    left: 50%;
    transform: translateX(-50%);
    background-color: #333;
    color: #fff;
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 12px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
    z-index: 999;
}

.text-link:hover .tooltip,
.logo-link:hover .tooltip {
    opacity: 1;
}

/* 响应式适配 */
@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        margin-right: 0;
        margin-bottom: 20px;
    }
    .logo-links, .text-links {
        justify-content: center;
    }
}