/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', sans-serif;
    background: #f1f5f8;
    color: #102a42;
    line-height: 1.5;
}

.section-center {
    width: 90vw;
    margin: 0 auto;
    max-width: 1170px;
    min-height: 100vh;
    display: grid;
    place-items: center;
}

@media screen and (min-width: 992px) {
    .section-center {
        grid-template-columns: 1fr 1fr;
        column-gap: 3rem;
    }
}

.gift-img img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    border-radius: 0.25rem;
    margin-bottom: 2rem;
}

@media screen and (min-width: 992px) {
    .gift-img {
        margin-bottom: 0;
    }
}

.gift-info h3 {
    text-transform: uppercase;
    color: #c59d5f;
    letter-spacing: 0.1rem;
    font-size: 2rem;
    margin-bottom: 1rem;
}

.gift-info p {
    color: #617d98;
    margin-bottom: 2rem;
    line-height: 2;
}

.current-time-container {
    margin-bottom: 1rem;
    font-weight: bold;
    color: #49a6e9;
}

.custom-date-container {
    margin-bottom: 2rem;
    display: flex;
    gap: 0.5rem;
}

#custom-date {
    padding: 0.25rem 0.5rem;
    border: 1px solid #ccc;
    border-radius: 0.25rem;
}

.btn {
    background: #49a6e9;
    color: #fff;
    border: none;
    padding: 0.25rem 0.75rem;
    border-radius: 0.25rem;
    cursor: pointer;
    transition: all 0.3s linear;
}

.btn:hover {
    background: #102a42;
}

.giveaway {
    color: #102a42;
    font-weight: bold;
    letter-spacing: 0.1rem;
    margin-bottom: 2rem;
}

.deadline {
    display: flex;
}

.deadline-format {
    background: #102a42;
    color: #fff;
    margin-right: 1rem;
    width: 5rem;
    height: 5rem;
    display: grid;
    place-items: center;
    text-align: center;
    border-radius: 0.25rem;
}

.deadline-format span {
    display: block;
    text-transform: uppercase;
    letter-spacing: 0.1rem;
    font-size: 0.75rem;
}

.deadline-format h4 {
    font-size: 1.75rem;
    font-weight: bold;
    letter-spacing: 0.1rem;
    line-height: 1;
    margin-bottom: 0.25rem;
}