body {
    background: #f5f7fb;
}

.nct-layout {
    display: flex;
    gap: 20px;
    padding: 20px;
    background: #f5f7fb;
    font-family: -apple-system, BlinkMacSystemFont,
                 "Segoe UI", Roboto, sans-serif;
}

/* 左侧 */
.nct-sidebar {
    width: 33%;
    background: #e9edf3;
    padding: 20px;
    border-radius: 12px;
}

/* 右侧 */
.nct-main {
    width: 67%;
    background: #fff;
    padding: 20px;
    border-radius: 12px;
    min-height: 650px;
}

.nct-title {
    font-size: 22px;
    margin-bottom: 20px;
}

.nct-chart-title {
    text-align: center;
    margin-bottom: 20px;
}

.nct-item {
    margin-bottom: 18px;
}

.nct-item label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.nct-input {
    width: 100%;
    padding: 10px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    background: #fff;
    font-size: 14px;
}

textarea.nct-input {
    height: 120px;
    resize: vertical;
}

.nct-chart-wrap {
    position: relative;
    height: 550px;
}

.nct-chart {
    width: 100%;
    height: 100%;
}

/* 按钮 */
.nct-buttons {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.nct-generate,
.nct-download,
.nct-share {
    flex: 1;
    padding: 12px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    color: #fff;
    font-size: 14px;
}

.nct-generate {
    background: #2563eb;
}

.nct-download {
    background: #16a34a;
}

.nct-share {
    background: #7c3aed;
}