.date-calc {
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    padding: 24px;
    margin-bottom: 24px;
    width: 100%;
    box-sizing: border-box;
}

/* 标题 */
.calc-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #333;
    display: flex;
    align-items: center;
}
.section-title {
    font-size: 18px;
    font-weight: 600;
    color: #374151;
    margin-bottom: 12px;
}

/* 模块间距 */
.section {
    margin-bottom: 32px;
}

/* 输入行 */
.input-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

/* 输入框 */
.input-sm {
    width: 64px;
}
.input-md {
    width: 80px;
}
.input {
    border: 1px solid #d1d5db;
    border-radius: 6px;
    padding: 6px 8px;
    font-size: 14px;
    box-sizing: border-box;
}
.input:focus {
    outline: none;
    border-color: #16a34a;
    box-shadow: 0 0 0 2px rgba(22, 163, 74, 0.2);
}

/* 文字 */
.label-text {
    color: #4b5563;
    font-size: 14px;
}

/* 按钮 */
.btn {
    border: none;
    border-radius: 6px;
    padding: 6px 12px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.2s;
}
.btn-green {
    background: #16a34a;
    color: #fff;
}
.btn-green:hover {
    background: #15803d;
}
.btn-text {
    background: none;
    color: #2563eb;
    padding: 0;
    text-decoration: underline;
    font-size: 13px;
}
.btn-text:hover {
    color: #1d4ed8;
}

/* 结果框 */
.result-box {
    width: 100%;
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    padding: 10px 12px;
    min-height: 44px;
    box-sizing: border-box;
    font-size: 14px;
}

/* 选择框 */
.select {
    border: 1px solid #d1d5db;
    border-radius: 6px;
    padding: 6px 8px;
    font-size: 14px;
}

/* 简介 */
.desc {
    margin-top: 16px;
    font-size: 14px;
    color: #6b7280;
    line-height: 1.5;
}