.confirm{
    max-width: 1200px;
    margin: 90px auto 30px;
    display: flex;
    gap: 20px;
}
.confirm-container {

    border-radius: 8px;
    flex: 1;
    background: #fff;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.confirm-header {
    text-align: center;
    margin-bottom: 30px;
}

.confirm-title {
    font-size: 24px;
    color: #333;
    margin-bottom: 20px;
}

.confirm-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 30px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 8px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.info-item i {
    color: var(--primary-color);
    font-size: 18px;
}

.info-item span {
    color: #666;
}

.info-item strong {
    color: #333;
}

.confirm-rules {
    margin-bottom: 30px;
    padding: 20px;
    background: #fff1f0;
    border: 1px solid #ffa39e;
    border-radius: 8px;
}

.confirm-rules h3 {
    color: #f5222d;
    margin-bottom: 15px;
    font-size: 16px;
}

.confirm-rules ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.confirm-rules li {
    color: #666;
    margin-bottom: 10px;
    padding-left: 20px;
    position: relative;
}

.confirm-rules li:before {
    content: "•";
    color: #f5222d;
    position: absolute;
    left: 0;
}

.confirm-actions {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.btn-start {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 16px;
}

.btn-start:hover {
    background-color: var(--primary-hover);
}

.btn-cancel {
    background-color: #fff;
    color: #666;
    border: 1px solid #d9d9d9;
    padding: 12px 30px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 16px;
}

.btn-cancel:hover {
    color: #f5222d;
    border-color: #f5222d;
}

/* 侧边栏课程卡片图片 */
.course-sidebar {
    width: 300px;
    position: sticky;
    top: 80px; /* 修改为80px，与头部导航保持20px距离 */
    height: fit-content;
}
.course-sidebar .course-image {
    width: 100%;
    height: 160px;
    margin-bottom: 15px;
}

.course-sidebar .course-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 4px;
}

.course-card {
    background: #fff;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}
.course-price {
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.course-price small {
    font-size: 14px;
    color: #999;
}
.btn-enroll {
    display: block;
    width: 100%;
    padding: 12px;
    background: var(--primary-color);
    color: #fff;
    text-align: center;
    border-radius: 4px;
    text-decoration: none;
    transition: background 0.3s;
}

.btn-enroll:hover {
    background: var(--primary-color);
    opacity: 0.9;
}
.course-info {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.paper-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
    color: #666;
    font-size: 13px;
}

.paper-item:last-child {
    margin-bottom: 0;
}

.paper-item span {
    display: flex;
    align-items: center;
    gap: 8px;
}

.paper-item i {
    color: var(--primary-color);
    font-size: 14px;
}

.info-item span:last-child {
    color: #333;
    font-weight: 500;
}

/* 移动端适配 */
@media screen and (max-width: 768px) {
    .confirm {
        margin: 60px auto 20px;
        flex-direction: column;
        padding: 0 15px;
    }

    .confirm-container {
        padding: 15px;
    }

    .confirm-header {
        margin-bottom: 20px;
    }

    .confirm-title {
        font-size: 20px;
        margin-bottom: 15px;
    }

    .confirm-info {
        grid-template-columns: 1fr;
        gap: 15px;
        margin-bottom: 20px;
        padding: 15px;
    }

    .info-item {
        font-size: 13px;
    }

    .info-item i {
        font-size: 16px;
    }

    .confirm-rules {
        margin-bottom: 20px;
        padding: 15px;
    }

    .confirm-rules h3 {
        font-size: 15px;
        margin-bottom: 12px;
    }

    .confirm-rules li {
        font-size: 13px;
        margin-bottom: 8px;
        padding-left: 18px;
    }

    .confirm-actions {
        flex-direction: column;
        gap: 12px;
    }

    .btn-start, .btn-cancel, .btn-enroll {
        width: 100%;
        padding: 10px;
        font-size: 15px;
    }

    .course-sidebar {
        width: 100%;
        position: static;
        margin-top: 20px;
    }

    .course-sidebar .course-image {
        height: 140px;
    }

    .course-card {
        padding: 15px;
    }

    .course-price {
        font-size: 20px;
        margin-bottom: 12px;
    }

    .course-price small {
        font-size: 13px;
    }

    .course-info {
        margin-top: 15px;
        padding-top: 15px;
    }

    .paper-item {
        font-size: 12px;
        margin-bottom: 10px;
    }

    .paper-item i {
        font-size: 13px;
    }
}

/* 小屏幕手机适配 */
@media screen and (max-width: 375px) {
    .confirm {
        margin: 50px auto 15px;
        padding: 0 12px;
    }

    .confirm-container {
        padding: 12px;
    }

    .confirm-header {
        margin-bottom: 15px;
    }

    .confirm-title {
        font-size: 18px;
        margin-bottom: 12px;
    }

    .confirm-info {
        gap: 12px;
        margin-bottom: 15px;
        padding: 12px;
    }

    .info-item {
        font-size: 12px;
    }

    .info-item i {
        font-size: 15px;
    }

    .confirm-rules {
        margin-bottom: 15px;
        padding: 12px;
    }

    .confirm-rules h3 {
        font-size: 14px;
        margin-bottom: 10px;
    }

    .confirm-rules li {
        font-size: 12px;
        margin-bottom: 6px;
        padding-left: 15px;
    }

    .btn-start, .btn-cancel, .btn-enroll {
        padding: 8px;
        font-size: 14px;
    }

    .course-sidebar .course-image {
        height: 120px;
    }

    .course-card {
        padding: 12px;
    }

    .course-price {
        font-size: 18px;
        margin-bottom: 10px;
    }

    .course-price small {
        font-size: 12px;
    }

    .course-info {
        margin-top: 12px;
        padding-top: 12px;
    }

    .paper-item {
        font-size: 11px;
        margin-bottom: 8px;
    }

    .paper-item i {
        font-size: 12px;
    }
}