body,
html {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
background: linear-gradient(to bottom, #007dc6, #2f4eb4);
    color: white;
    text-align: center;
    overflow-x: hidden;
}

.container {
    max-width: 500px;
    margin: auto;
    padding: 20px;
}

.logo {
    width: 200px;
    margin-bottom: 10px;
}

.giftcard {
    width: 80%;
    margin: 20px 0;
}

.card {
    background-color: #fff;
    border-radius: 12px;
    padding: 20px;
    color: #333;
    position: relative;
}

.subtitle {
    font-size: 1.2rem;
}

.description {
    margin: 15px 0;
    font-size: 1rem;
}

.alert {
    background-color: #ff5722;
    color: white;
    font-weight: bold;
    padding: 10px;
    border-radius: 6px;
    margin-bottom: 15px;
    font-size: 0.95rem;
}

.countdown {
    font-size: 1.2rem;
    color: #d50000;
    font-weight: bold;
    margin-top: 10px;
}

.progress-bar {
    width: 100%;
    background-color: #ddd;
    border-radius: 5px;
    margin-top: 10px;
    height: 10px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background-color: #4caf50;
    transition: width 0.3s ease;
}

.quiz {
    margin: 20px 0;
}

.question {
    font-weight: bold;
}

.answers {
    display: flex;
    justify-content: space-around;
    margin-top: 15px;
}

.answer-btn {
    background: #ffca28;
    border: none;
    padding: 10px 20px;
    font-size: 1rem;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.3s ease;
}

.answer-btn:hover {
    background: #ffc107;
}

/* 添加闪烁效果 */

@keyframes flash {
    0% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
    100% {
        opacity: 1;
    }
}

/* 默认隐藏 Claim Now 按钮 */

.cta-btn {
    margin-top: 20px;
    display: none;
    /* 默认不显示 */
    background: #136abf;
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 1.1rem;
    border-radius: 8px;
    cursor: pointer;
    animation: flash 1.5s infinite;
    /* 闪烁动画 */
}

.cta-btn:hover {
    background: #512da8;
}

.cta-hint {
    font-size: 0.9rem;
    color: #444;
    margin-top: 10px;
}

.disclaimer {
    font-size: 0.8rem;
    margin-top: 20px;
    color: #ccc;
}

.comments {
    background: #f5f5f5;
    padding: 15px;
    border-radius: 10px;
    text-align: left;
    color: #333;
    min-height: 160px;
    overflow: hidden;
}

.comment {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 15px;
    animation: fadeIn 0.5s ease-in;
}

.comment img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.falling-gift {
    position: absolute;
    width: 40px;
    height: 40px;
    background: url('../img/gift-icon.png') no-repeat center/contain;
    animation: dropGift 4s linear infinite;
    top: -50px;
    z-index: 0;
}

@keyframes dropGift {
    0% {
        transform: translateY(0);
        opacity: 0.9;
    }
    100% {
        transform: translateY(600px);
        opacity: 0;
    }
}