* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft YaHei", Arial, sans-serif;
}

body {
    height: 100vh;
}

/* 背景 */
.bg {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 18px;
    background: linear-gradient(180deg, #fff3df, #ffe7c2);
}

/* ⭐ 核心：完全接近你截图比例 */
.card {
    width: 92%;
    max-width: 380px;

    /* ⭐ 关键：控制“高度感”接近截图 */
    min-height: 420px;

    background: #fff;
    border-radius: 22px;

    padding: 28px 20px;

    text-align: center;

    box-shadow: 0 12px 28px rgba(0,0,0,0.10);

    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

/* 标题 */
.title {
    font-size: 24px;
    font-weight: bold;
    color: #ff7a00;
    margin-bottom: 12px;
}

/* 说明文字 */
.desc {
    font-size: 15px;
    color: #333;
    line-height: 1.8;
    margin-bottom: 18px;
}

/* 按钮 */
.btn {
    width: 100%;
    padding: 16px;
    border: none;
    border-radius: 16px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    margin-top: 14px;
    transition: 0.2s;
    -webkit-tap-highlight-color: transparent;
}

.orange {
    background: linear-gradient(90deg, #ff7a00, #ff9a2e);
    color: #fff;
    box-shadow: 0 10px 20px rgba(255, 122, 0, 0.25);
}

.green {
    background: linear-gradient(90deg, #00c853, #00e676);
    color: #fff;
    box-shadow: 0 10px 20px rgba(0, 200, 83, 0.25);
}

.btn:active {
    transform: scale(0.97);
}

/* 底部提示 */
.footer {
    font-size: 13px;
    color: #ff7a00;
    margin-top: 16px;
}

/* 📱 小屏优化 */
@media (max-width: 480px) {
    .card {
        width: 94%;
        min-height: 400px;
        padding: 24px 16px;
        border-radius: 20px;
    }

    .title {
        font-size: 22px;
    }

    .desc {
        font-size: 14px;
    }
}