.container {
    background-color: var(--surface-color);
    min-height: 100vh;
    padding-bottom: 120rpx;
}
.hero-image {
    width: 100%;
    height: 400rpx;
}
.content {
    padding: 40rpx;
    border-top-left-radius: 40rpx;
    border-top-right-radius: 40rpx;
    margin-top: -40rpx;
    background-color: var(--surface-color);
    position: relative;
    z-index: 10;
}
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20rpx;
}
.badge {
    background-color: var(--primary-light);
    color: var(--primary-color);
    font-size: 24rpx;
    padding: 8rpx 20rpx;
    border-radius: 12rpx;
    font-weight: bold;
}
.rating {
    color: var(--warning-color);
    font-size: 24rpx;
    font-weight: bold;
}
.title {
    font-size: 40rpx;
    font-weight: bold;
    color: var(--text-main);
    margin-bottom: 20rpx;
    line-height: 1.4;
}
.meta-row {
    display: flex;
    gap: 30rpx;
    margin-bottom: 40rpx;
}
.meta-item {
    font-size: 24rpx;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
}
.icon {
    margin-right: 8rpx;
}
.section {
    margin-bottom: 40rpx;
}
.section-title {
    font-size: 32rpx;
    font-weight: bold;
    color: var(--text-main);
    margin-bottom: 20rpx;
    border-left: 8rpx solid var(--primary-color);
    padding-left: 20rpx;
}
.desc {
    font-size: 28rpx;
    color: #4b5563;
    line-height: 1.6;
}
.chapter-header {
    font-size: 28rpx;
    font-weight: bold;
    color: #374151;
    margin: 30rpx 0 20rpx 0;
    background-color: var(--surface-secondary);
    padding: 10rpx 20rpx;
    border-radius: 10rpx;
}
.lesson-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20rpx 0;
    border-bottom: 1rpx solid var(--border-color);
}
.lesson-info {
    flex: 1;
}
.lesson-title {
    font-size: 28rpx;
    color: var(--text-main);
    margin-bottom: 6rpx;
}
.lesson-time {
    font-size: 22rpx;
    color: var(--text-light);
}
.play-btn {
    color: var(--primary-color);
    font-size: 32rpx;
}
.lock-btn {
    color: var(--text-light);
    font-size: 28rpx;
}
.footer-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--surface-color);
    padding: 20rpx 40rpx;
    box-shadow: 0 -4rpx 10rpx rgba(0,0,0,0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 20;
    padding-bottom: constant(safe-area-inset-bottom);
    padding-bottom: env(safe-area-inset-bottom);
}
.price-container {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    flex: 1;
    margin-right: 20rpx;
}

.price-row {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
}

.final-price {
    color: var(--price-color);
    font-weight: bold;
    font-size: 36rpx;
    line-height: 1.2;
}

.original-price {
    text-decoration: line-through;
    color: var(--text-light);
    font-size: 24rpx;
    margin-left: 10rpx;
}

.coupon-tip {
    font-size: 20rpx;
    color: var(--price-color);
    border: 1px solid var(--price-color);
    padding: 2rpx 6rpx;
    border-radius: 4rpx;
    margin-top: 4rpx;
}
.enroll-btn {
    background: linear-gradient(to right, var(--primary-gradient-start), var(--primary-gradient-end));
    color: var(--text-white);
    font-size: 30rpx;
    font-weight: bold;
    padding: 20rpx 60rpx;
    border-radius: 50rpx;
    margin: 0;
    flex-shrink: 0;
    white-space: nowrap;
}