section.course-outline {
    width: 100%;
    background-color: transparent;
    color: var(--color-on-surface);
    margin: var(--margin-section) 0;
}

/* 目录 */
.course-outline .content-title {
    padding: 0 var(--padding-side);
    max-width: var(--max-width);
    margin: var(--space-5) auto;
    display: flex;
    position: relative;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid var(--color-primary);
}

.course-outline .content-title h1 {
    font-size: 1rem;
    text-align: center;
    position: relative;
    color: var(--color-primary);
    padding: var(--space-2) var(--space-4);
    cursor: pointer;
}

.course-outline .content-title h1:hover {
    font-weight: 900;
    color: var(--color-on-primary);
    background-color: var(--color-primary);
}

.course-outline .content-title h1.active {
    font-weight: 900;
    color: var(--color-on-primary);
    background-color: var(--color-primary);
}

/* 内容 */
.course-outline .content {
    padding: 0 var(--padding-side);
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    position: relative;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
}

.course-outline .course-price-box {
    display: grid;
    /* 三个一排 */
    grid-template-columns: repeat(3, 1fr);
    align-items: center;
    justify-items: center;
    gap: var(--space-5);
    width: 100%;
    font-size: 1rem;
}

.course-outline .price-title {
    font-weight: 900;
    color: var(--color-primary);
}

.course-outline .price-course-title {
    font-weight: 900;
}

.course-outline .bundle-list {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.course-outline .original-price {
    text-decoration: line-through;
    opacity: 0.5;
}

.course-outline .discounted-price {
    font-size: 1rem;
    color: var(--color-primary);
}

.course-outline .course-outline-box {
    width: 100%;
    display: flex;
    flex-direction: column;
}

.course-outline .series-item {
    padding: var(--space-5);
    /* background: var(--color-gradient-primary); */
    /* background: var(--color-surface); */
    /* box-shadow: var(--box-shadow); */
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    color: var(--color-primary);
    /* 模糊元素后面的东西 */
    -webkit-backdrop-filter: blur(25px);
    backdrop-filter: blur(25px);
}

.course-outline .series-title-box h2 {
    font-size: 1.3rem;
}

.course-outline .series-title-box {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    font-size: 1.3rem;
}

.course-outline .series-title {}

.course-outline .series-price {
    font-weight: 900;
}

.course-outline .video-item {
    font-size: 0.9rem;
}

.course-outline .video-type {
    position: absolute;
    left: 100%;
    top: -0.3125rem;
    display: flex;
    flex-direction: row;
    gap: var(--space-2);
    margin-left: var(--space-2);
}

.video-type-item {
    padding: 0.0625rem var(--space-2);
    border-radius: 0.3125rem;
    white-space: nowrap;
    font-size: 0.7rem;
}

.video-type-item.new {
    background-color: var(--color-error);
    color: var(--color-on-error);
}

.video-type-item.free {
    background-color: var(--color-success);
    color: var(--color-on-success);
}

.video-type-item.upcoming {
    background-color: var(--color-neutral);
    color: var(--color-on-inverse);
}

.video-type.normal {
    display: none;
}

.course-outline .video-title {
    color: var(--color-primary);
    position: relative;
}

.course-outline li.knowledge {
    padding: var(--space-2) 0;
    color: var(--color-on-surface);
    border-bottom: 1px solid var(--color-divider);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-left: 0.6875rem;
    gap: var(--space-2);
    font-size: 1rem;
}

.course-outline span.knowledge-time {
    font-size: 0.8rem;
    flex-shrink: 0
}

.course-outline .video-duration {
    font-size: 0.8rem;
    /* min-width: 100px; */
    flex-shrink: 0
}

.course-outline .video-title-box {
    display: flex;
    flex-direction: row;
    width: 100%;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px dotted;
    padding: var(--space-2) 0;
    gap: var(--space-5);
    font-size: 1rem;
}

/* 服务 */
.course-outline .service-list {
    margin-top: 1.875rem;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: var(--space-5);
}

.course-outline .service-list .service-box {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: var(--space-5);
}

.course-outline .service-list .service-box>.icon {
    font-size: 2.5rem;
    color: var(--color-primary);
}

.course-outline .check {
    padding: 0.1875rem var(--space-2);
    color: var(--color-on-primary);
    background-color: var(--color-primary);
    font-size: 0.8rem;
}