* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Microsoft Yahei", "PingFang SC", sans-serif;}
        body {
            background-color: #f5f7fa;
            color: #333;
            padding: 40px 15px;}
        .container {
            max-width: 700px;
            margin: 0 auto;
            background: #ffffff;
            border-radius: 10px;
            box-shadow: 0 2px 12px rgba(0,0,0,0.08);
            overflow: hidden;}
        .header {
            background-color: #0f4c81;
            color: #fff;
            text-align: center;
            padding: 24px;}
        .header h1 {
            font-size: 24px;
            font-weight: normal;}
        .tip {
            padding: 16px 24px;
            background: #fff9e6;
            border-left: 4px solid #f0ad4e;
            font-size: 14px;
            color: #664d03;
            line-height: 1.6;}
        .info-item {
            padding: 30px 24px;
            text-align: center;}
        .info-item p {
            font-size: 18px;
            margin-bottom: 16px;
            line-height: 1.8;}
        .email-link {
            font-size: 20px;
            color: #0f4c81;
            text-decoration: none;
            font-weight: 500;}
        .email-link:hover {
            text-decoration: underline;}
        .footer {
            padding: 20px 24px;
            text-align: center;
            font-size: 13px;
            color: #777;
            line-height: 1.7;}
        @media (max-width:640px) {
            .header h1 {
                font-size: 20px;}
            .info-item p {
                font-size: 16px;}
            .email-link {
                font-size: 18px;}
        }