.tool-container {
    max-width: 850px;
    margin: 40px auto;
    padding: 35px 30px;
    background: #fff;
}

.tool-title {
    font-size: 28px;
    font-weight: 600;
    text-align: center;
    color: #2c3e50;
    margin-bottom: 8px;
}
.tool-desc {
    text-align: center;
    color: #7f8c8d;
    font-size: 15px;
    margin-bottom: 40px;
}

/* 区域模块 */
.section {
    margin-bottom: 35px;
}
.section-title {
    font-size: 18px;
    color: #2c3e50;
    margin-bottom: 20px;
    font-weight: 600;
    border-left: 4px solid #3498db;
    padding-left: 12px;
}

/* 表单 */
.form-row {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}
.form-group {
    flex: 1;
}
.form-label {
    display: block;
    font-size: 14px;
    color: #555;
    margin-bottom: 8px;
}
.select-box,
.time-input {
    width: 100%;
    height: 46px;
    padding: 0 15px;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    font-size: 15px;
    outline: none;
}
.select-box:focus,
.time-input:focus {
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52,152,219,0.15);
}

/* 按钮 */
.btn-convert {
    width: 100%;
    height: 48px;
    background: #3498db;
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    cursor: pointer;
}
.btn-convert:hover {
    background: #2980b9;
}

/* 结果 */
.result-box {
    margin-top: 20px;
    padding: 20px;
    background: #f8fafc;
    border-radius: 10px;
    text-align: center;
}
.result-val {
    font-size: 22px;
    color: #2c3e50;
    font-weight: 600;
    margin-bottom: 8px;
}
.result-tip {
    font-size: 14px;
    color: #7f8c8d;
}

/* 分割线 */
.divider {
    height: 1px;
    background-color: #e5e7eb;
    margin: 40px 0;
}

/* 底部时辰说明 */
.chen-info-title {
    font-size: 20px;
    font-weight: 600;
    color: #2c3e50;
    text-align: center;
    margin-bottom: 25px;
}
.chen-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 14px;
}
.chen-item {
    background: #fafbfc;
    border-radius: 12px;
    padding: 16px;
    border: 1px solid #f0f2f5;
}
.chen-name {
    font-size: 16px;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 6px;
    display: flex;
    justify-content: space-between;
}
.chen-time {
    font-size: 13px;
    color: #3498db;
}
.chen-desc {
    font-size: 13px;
    color: #7f8c8d;
    line-height: 1.5;
}