body {
            font-family: -apple-system, "Microsoft YaHei", sans-serif;
            max-width: 500px;
            margin: 60px auto;
            padding: 0 20px;
            text-align: center;
            color: #333;
        }
        .card {
            border: 1px solid #eee;
            border-radius: 12px;
            padding: 20px;
            box-shadow: 0 2px 12px rgba(0,0,0,0.06);
        }
        .card img {
            width: 20px;
            border-radius: 8px;
        }
        .card h1 { font-size: 18px; margin: 16px 0 8px; }
        .card p  { color: #888; font-size: 14px; }
        .tip { margin-top: 24px; font-size: 13px; color: #aaa; }
        
        .ip-box {
    margin-top: 20px;
    padding: 10px 16px;
    background: #f0f7ff;
    border: 1px solid #d6e8ff;
    border-radius: 8px;
    font-size: 14px;
    color: #555;
}

.ip-box .ip {
    font-family: monospace;
    color: #1677ff;
    font-weight: bold;
}

.gps-btn {
    display: block;
    width: 100%;
    margin-top: 20px;
    padding: 12px;
    background: #1677ff;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.2s;
}

.gps-btn:hover {
    background: #0958d9;
}

.gps-btn:disabled {
    background: #aaa;
    cursor: not-allowed;
}

.gps-box {
    margin-top: 12px;
    padding: 10px 16px;
    background: #f6ffed;
    border: 1px solid #d9f7be;
    border-radius: 8px;
    font-size: 14px;
    color: #555;
}