* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
        }
        body {
            background-color: #f7f8fa;
            color: #333;
            line-height: 1.8;
        }
        /* 网站标题区（无顶部导航） */
        .site-header {
            background: #27ae60;
            color: #fff;
            padding: 25px 0;
            text-align: center;
            margin-bottom: 28px;
        }
        .site-header a {
    color: #fff;
    text-decoration: none;
}
        .site-header h1 {
            font-size: 25px;
            margin-bottom: 8px;
        }
        .site-header p {
            font-size: 14px;
            opacity: 0.9;
            max-width: 650px;
            margin: 0 auto;
        }
        /* 主体容器 */
        .container {
            width: 1100px;
            margin: 0 auto 35px;
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        /* 文章正文（工具上方，标题居中） */
        .article-main {
            background: #fff;
            border-radius: 8px;
            padding: 28px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.06);
        }
        .article-main h2 {
            font-size: 19px;
            color: #2c3e50;
            text-align: center;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 1px solid #eee;
        }
        .article-main p {
            font-size: 15px;
            color: #666;
            margin-bottom: 16px;
            text-indent: 2em;
        }
        .article-main p:last-child {
            margin-bottom: 0;
        }
        /* 核心转换工具 */
        .tool-section {
            background: #fff;
            border-radius: 8px;
            padding: 28px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.06);
        }
        .tool-section h2 {
            font-size: 19px;
            color: #2c3e50;
            margin-bottom: 20px;
            padding-left: 12px;
            border-left: 4px solid #27ae60;
        }
                .tool-section h3 {
    font-size: 19px;
    color: #2c3e50;
    text-align: center;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid #eee;
    margin-top: 20px;
}
        .tool-content {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .text-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .text-group label {
            font-size: 14px;
            color: #666;
        }
        .text-group textarea {
            width: 100%;
            height: 150px;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 14px;
            resize: vertical;
            transition: border 0.3s;
        }
        .text-group textarea:focus {
            outline: none;
            border-color: #27ae60;
        }
        .btn-group {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .btn {
            padding: 9px 20px;
            border: none;
            border-radius: 4px;
            font-size: 14px;
            cursor: pointer;
            transition: background 0.3s;
        }
        .btn-primary {
            background: #27ae60;
            color: #fff;
        }
        .btn-primary:hover {
            background: #219653;
        }
        .btn-default {
            background: #f1f2f3;
            color: #333;
        }
        .btn-default:hover {
            background: #e4e5e6;
        }
        /* 文章列表（工具下方，仅显标题） */
        .article-list {
            background: #fff;
            border-radius: 8px;
            padding: 28px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.06);
        }
        .article-list h2 {
            font-size: 19px;
            color: #2c3e50;
            margin-bottom: 20px;
            padding-left: 12px;
            border-left: 4px solid #27ae60;
        }
        .list-content {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 10px;
        }
        .list-content a {
            font-size: 15px;
            color: #27ae60;
            text-decoration: none;
            display: inline-block;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .list-content a:hover {
            text-decoration: underline;
        }
        /* 底部信息 */
        .footer {
            background: #2c3e50;
            color: #fff;
            padding: 18px 0;
            font-size: 13px;
            text-align: center;
        }
        /* 响应式适配 */
        @media (max-width: 1120px) {
            .container {
                width: 95%;
            }
        }
        @media (max-width: 768px) {
            .site-header h1 {
                font-size: 22px;
            }
            .article-main, .tool-section, .article-list {
                padding: 20px;
            }
            .text-group textarea {
                height: 130px;
            }
            .btn-group {
                justify-content: center;
            }
            .list-content {
                grid-template-columns: 1fr;
            }
            .article-main p {
                text-indent: 1em;
                font-size: 14px;
            }
        }
         /* 新增：友情链接模块（底部，匹配原站风格） */
        .friend-link {
            width: 100%;
            background: #fff;
            border-radius: 4px;
            padding: 20px 25px;
            box-shadow: 0 1px 3px rgba(0,0,0,0.05);
        }
        .link-title {
    font-size: 19px;
    color: #2c3e50;
    margin-bottom: 20px;
        }
        .link-list {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }
        .link-list a {
            color: #666;
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s;
        }
        .link-list a:hover {
            color: #27ae60;
        }