/* 培训课程频道专用样式（列表 + 详情）
   视觉与 case.css / case-detail.css 保持一致，独立成文件避免与案例频道类名冲突 */
:root {
    --cu-line: #e8edf5;
    --cu-deep: #0d2c52;
}

/* 列表页头 */
.cu-hero {
    position: relative;
    padding: clamp(120px, 11vw, 168px) 0 clamp(46px, 5vw, 72px);
    background: linear-gradient(115deg, #0d2c52 0%, var(--main) 60%, #3b82c7 100%);
    overflow: hidden;
}
.cu-hero-bg {
    position: absolute;
    inset: 0;
    background: url('../images/course_1.png') center / cover no-repeat;
    opacity: 0.22;
}
.cu-hero-inner {
    position: relative;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 var(--gutter);
}
.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.72);
    margin-bottom: 18px;
}
.breadcrumb a {
    color: rgba(255, 255, 255, 0.72);
    transition: color 0.3s;
}
.breadcrumb a:hover {
    color: var(--gold);
}
.breadcrumb .current {
    color: #fff;
}
.cu-hero-title {
    font-size: clamp(28px, 3.4vw, 48px);
    font-weight: 500;
    color: #fff;
    letter-spacing: 1px;
    line-height: 1.3;
    margin-bottom: 14px;
    font-family: 'SourceHanSansSC Medium', "Microsoft Yahei", sans-serif;
}
.cu-hero-desc {
    max-width: 820px;
    font-size: clamp(14px, 1.1vw, 16px);
    line-height: 1.9;
    color: rgba(255, 255, 255, 0.82);
}
.cu-hero-stats {
    display: flex;
    flex-wrap: wrap;
    gap: clamp(24px, 4vw, 56px);
    margin-top: clamp(26px, 3vw, 40px);
}
.cu-hero-stats li {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.cu-stat-num {
    font-size: clamp(24px, 2.4vw, 34px);
    font-weight: 700;
    color: var(--gold);
    line-height: 1.1;
}
.cu-stat-label {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
}

/* 列表主体 */
.cu-main {
    background: #f6f7f9;
    padding: clamp(30px, 4vw, 50px) 0 clamp(46px, 5vw, 70px);
}
.cu-inner {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 var(--gutter);
}
.cu-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 14px 18px;
    background: #fff;
    border: 1px solid var(--cu-line);
    border-radius: 12px;
}
.cu-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.cu-tab {
    font: inherit;
    font-size: 14px;
    color: #555;
    background: #f4f6fa;
    border: 0;
    border-radius: 30px;
    padding: 8px 18px;
    cursor: pointer;
    transition: all 0.3s;
}
.cu-tab:hover {
    color: var(--main);
}
.cu-tab.active {
    background: var(--main);
    color: #fff;
}
.cu-search input {
    font: inherit;
    font-size: 13px;
    color: #333;
    height: 38px;
    width: clamp(180px, 22vw, 260px);
    border: 1px solid #dde4ee;
    border-radius: 6px;
    padding: 0 12px;
    background: #fff;
    outline: none;
    transition: border-color 0.3s;
}
.cu-search input:focus {
    border-color: var(--main);
}
.cu-count {
    font-size: 13px;
    color: #888;
    margin: 16px 2px 18px;
}

/* 课程网格 */
.cu-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(16px, 1.6vw, 24px);
}
.cu-card {
    display: flex;
    background: #fff;
    border: 1px solid var(--cu-line);
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}
.cu-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 14px 30px rgba(13, 44, 82, 0.1);
}
.cu-card.is-hide {
    display: none;
}
.cu-card > article {
    display: flex;
    flex-direction: column;
    width: 100%;
}
.cu-media {
    position: relative;
    overflow: hidden;
    background: #eef2f7;
}
.cu-media img {
    display: block;
    width: 100%;
    height: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    transition: transform 0.5s;
}
.cu-card:hover .cu-media img {
    transform: scale(1.05);
}
.cu-badge {
    position: absolute;
    left: 12px;
    top: 12px;
    padding: 4px 10px;
    background: var(--main);
    color: #fff;
    font-size: 12px;
    border-radius: 4px;
}
.cu-body {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: clamp(16px, 1.6vw, 24px);
}
.cu-name {
    font-size: clamp(17px, 1.35vw, 20px);
    font-weight: 600;
    color: #16233a;
    line-height: 1.5;
}
.cu-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 10px;
    font-size: 12px;
    color: #8b95a5;
}
.cu-meta span {
    position: relative;
    padding-right: 10px;
}
.cu-meta span::after {
    content: "";
    position: absolute;
    right: 0;
    top: 50%;
    width: 1px;
    height: 10px;
    background: #dfe5ee;
    transform: translateY(-50%);
}
.cu-meta span:last-child {
    padding-right: 0;
}
.cu-meta span:last-child::after {
    display: none;
}
.cu-desc {
    margin: 14px 0 0;
    font-size: clamp(13px, 1.1vw, 15px);
    line-height: 1.9;
    color: #556274;
}
.cu-foot {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-top: auto;
    padding-top: 16px;
}
.cu-price {
    font-size: 15px;
    font-weight: 600;
    color: #d97706;
}
.cu-price-empty {
    font-size: 13px;
    color: #8b95a5;
}
.cu-detail-link {
    padding: 8px 20px;
    border-radius: 30px;
    background: rgba(21, 80, 160, 0.08);
    color: var(--main);
    font-size: 13px;
    transition: all 0.3s;
}
.cu-detail-link:hover {
    background: var(--main);
    color: #fff;
}
.cu-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px;
}
.cu-tag {
    font: inherit;
    font-size: 12px;
    color: #6a7686;
    background: #f4f6fa;
    border: 0;
    border-radius: 4px;
    padding: 5px 12px;
    cursor: pointer;
    transition: all 0.3s;
}
.cu-tag:hover {
    background: var(--main);
    color: #fff;
}
.cu-empty {
    padding: 40px 0;
    text-align: center;
    font-size: 14px;
    color: #8b95a5;
}
.cu-more-wrap {
    margin-top: clamp(20px, 2.4vw, 32px);
    text-align: center;
}
.cu-more {
    font: inherit;
    font-size: 14px;
    color: #fff;
    background: var(--main);
    border: 0;
    border-radius: 30px;
    padding: 11px 40px;
    cursor: pointer;
    transition: background 0.3s;
}
.cu-more:hover {
    background: #0f4c96;
}

/* 课程收获条 */
.cu-points {
    margin-top: clamp(36px, 4.5vw, 64px);
    padding: clamp(26px, 3vw, 44px) clamp(20px, 2.4vw, 40px);
    background: #fff;
    border: 1px solid var(--cu-line);
    border-radius: 12px;
}
.cu-points-title {
    text-align: center;
    font-size: clamp(18px, 1.7vw, 24px);
    font-weight: 600;
    color: #16233a;
}
.cu-point-list {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: clamp(12px, 1.6vw, 24px);
    margin: clamp(20px, 2.4vw, 32px) 0 0;
}
.cu-point-list li {
    padding: 16px 18px;
    border: 1px solid var(--cu-line);
    border-radius: 10px;
    background: #f7f9fc;
}
.cu-point-num {
    display: block;
    font-size: 20px;
    font-weight: 700;
    color: var(--main);
}
.cu-point-name {
    display: block;
    margin-top: 6px;
    font-size: 14px;
    color: #16233a;
}
.cu-point-desc {
    display: block;
    margin-top: 6px;
    font-size: 13px;
    line-height: 1.8;
    color: #6a7686;
}

/* 咨询引导 */
.cu-cta {
    margin-top: clamp(24px, 2.6vw, 36px);
    padding: clamp(24px, 2.8vw, 40px) clamp(22px, 2.6vw, 44px);
    border-radius: 12px;
    background: linear-gradient(115deg, #0d2c52, var(--main));
}
.cu-cta-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}
.cu-cta-title {
    font-size: clamp(18px, 1.7vw, 24px);
    font-weight: 500;
    color: #fff;
    line-height: 1.5;
}
.cu-cta-desc {
    margin-top: 10px;
    max-width: 640px;
    font-size: 14px;
    line-height: 1.9;
    color: rgba(255, 255, 255, 0.78);
}
.cu-cta-side {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}
.cu-cta-phone {
    font-size: clamp(22px, 2.2vw, 30px);
    font-weight: 700;
    color: var(--gold);
    line-height: 1.2;
}
.cu-cta-btn {
    padding: 11px 34px;
    border-radius: 30px;
    background: var(--gold);
    color: #16233a;
    font-size: 15px;
    transition: transform 0.3s;
}
.cu-cta-btn:hover {
    transform: translateY(-2px);
}

/* ============ 课程详情 ============ */
.cud-main {
    background: #f6f7f9;
    padding: clamp(120px, 11vw, 150px) 0 clamp(40px, 4.5vw, 64px);
}
.cud-inner {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 var(--gutter);
}
.cud-crumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 13px;
    color: #8b95a5;
    margin-bottom: 18px;
}
.cud-crumb a {
    color: #8b95a5;
    transition: color 0.3s;
}
.cud-crumb a:hover {
    color: var(--main);
}
.cud-crumb .current {
    color: #16233a;
}
.cud-head,
.cud-cover,
.cud-layout,
.cud-nav {
    background: #fff;
    border: 1px solid var(--cu-line);
    border-radius: 12px;
}
.cud-head {
    padding: clamp(24px, 2.6vw, 40px) clamp(20px, 2.4vw, 40px);
    margin-bottom: clamp(14px, 1.4vw, 18px);
}
.cud-title {
    margin-top: 14px;
    font-size: clamp(22px, 2.4vw, 34px);
    font-weight: 600;
    color: #16233a;
    line-height: 1.5;
}
.cud-meta {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    list-style: none;
    margin: clamp(18px, 2vw, 28px) 0 0;
    padding: 0;
}
.cud-meta li {
    font-size: 13px;
    color: #2f3c52;
    line-height: 1.7;
}
.cud-meta span {
    display: block;
    color: #98a2b2;
    font-size: 12px;
}
.cud-cover {
    margin: 0 0 clamp(14px, 1.4vw, 18px);
    padding: 0;
    overflow: hidden;
}
.cud-cover img {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 2 / 1;
    object-fit: cover;
}
.cud-cover figcaption {
    padding: 12px clamp(20px, 2.4vw, 40px);
    font-size: 13px;
    color: #8b95a5;
}
.cud-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: clamp(20px, 2.4vw, 32px);
    align-items: start;
    padding: clamp(24px, 2.6vw, 40px) clamp(20px, 2.4vw, 40px);
}
.cud-lead {
    padding: 16px 18px;
    border-left: 3px solid var(--main);
    background: #f7f9fc;
    border-radius: 0 8px 8px 0;
    font-size: clamp(14px, 1.15vw, 16px);
    line-height: 1.9;
    color: #3c4a5f;
}
.cud-h2 {
    margin: clamp(28px, 3vw, 40px) 0 14px;
    padding-left: 12px;
    border-left: 4px solid var(--main);
    font-size: clamp(17px, 1.6vw, 22px);
    font-weight: 600;
    color: #16233a;
    line-height: 1.5;
}
.cud-p {
    font-size: clamp(14px, 1.15vw, 16px);
    line-height: 2;
    color: #4d5a6d;
}
.cud-list {
    margin: 0;
    padding-left: 22px;
}
.cud-list li {
    margin-bottom: 8px;
    font-size: clamp(14px, 1.15vw, 16px);
    line-height: 1.9;
    color: #4d5a6d;
}
.cud-list li::marker {
    color: var(--main);
}
.cud-quote {
    margin: clamp(24px, 2.6vw, 34px) 0 0;
    padding: clamp(18px, 2vw, 26px) clamp(18px, 2vw, 28px);
    border-radius: 10px;
    background: linear-gradient(115deg, #0d2c52, var(--main));
    color: #fff;
    font-size: clamp(14px, 1.15vw, 16px);
    line-height: 1.9;
}
.cud-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: clamp(24px, 2.6vw, 34px);
}
.cud-tag {
    padding: 6px 14px;
    border-radius: 30px;
    background: #f4f6fa;
    color: #6a7686;
    font-size: 13px;
    transition: all 0.3s;
}
.cud-tag:hover {
    background: var(--main);
    color: #fff;
}
.cud-side {
    display: flex;
    flex-direction: column;
    gap: 16px;
    position: sticky;
    top: 100px;
}
.cud-widget {
    padding: clamp(18px, 1.8vw, 24px);
    background: #fff;
    border: 1px solid var(--cu-line);
    border-radius: 12px;
}
.cud-widget-title {
    font-size: 16px;
    font-weight: 600;
    color: #16233a;
    margin-bottom: 14px;
}
.cud-brief {
    margin: 0;
    font-size: 13px;
}
.cud-brief dt {
    color: #98a2b2;
    margin-top: 10px;
}
.cud-brief dt:first-child {
    margin-top: 0;
}
.cud-brief dd {
    margin: 2px 0 0;
    color: #2f3c52;
    line-height: 1.7;
}
.cud-widget-cta {
    background: linear-gradient(115deg, #0d2c52, var(--main));
    border-color: transparent;
}
.cud-widget-cta .cud-widget-title,
.cud-widget-cta p {
    color: #fff;
}
.cud-widget-cta p {
    font-size: 13px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.8);
}
.cud-cta-phone {
    margin: 12px 0;
    font-size: 24px;
    font-weight: 700;
    color: var(--gold) !important;
}
.cud-cta-btn {
    display: block;
    text-align: center;
    padding: 10px 0;
    border-radius: 30px;
    background: var(--gold);
    color: #16233a;
    font-size: 14px;
    transition: transform 0.3s;
}
.cud-cta-btn:hover {
    transform: translateY(-2px);
}
.cud-rel-list {
    list-style: none;
    margin: 0;
    padding: 0;
}
.cud-rel-list li + li {
    margin-top: 10px;
}
.cud-rel-list a {
    display: block;
    padding: 10px 12px;
    border-radius: 8px;
    background: #f7f9fc;
    transition: background 0.3s;
}
.cud-rel-list a:hover {
    background: rgba(21, 80, 160, 0.08);
}
.cud-rel-name {
    display: block;
    font-size: 14px;
    color: #16233a;
}
.cud-rel-meta {
    display: block;
    margin-top: 4px;
    font-size: 12px;
    color: #98a2b2;
}
.cud-nav {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 12px;
    margin-top: clamp(14px, 1.4vw, 18px);
    padding: clamp(18px, 1.8vw, 24px) clamp(20px, 2.4vw, 40px);
}
.cud-nav-item {
    display: block;
    font-size: 14px;
}
.cud-nav-label {
    display: block;
    font-size: 12px;
    color: #98a2b2;
}
.cud-nav-name {
    display: block;
    margin-top: 4px;
    color: #16233a;
    transition: color 0.3s;
}
.cud-nav-item:hover .cud-nav-name {
    color: var(--main);
}
.cud-nav-next {
    text-align: right;
}
.cud-nav-back {
    padding: 9px 22px;
    border-radius: 30px;
    background: var(--main);
    color: #fff;
    text-align: center;
    transition: background 0.3s;
}
.cud-nav-back:hover {
    background: #0f4c96;
}

@media (max-width: 1100px) {
    .cu-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .cu-point-list {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}
@media (max-width: 1000px) {
    .cud-layout {
        grid-template-columns: minmax(0, 1fr);
    }
    .cud-side {
        position: static;
    }
    .cud-meta {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}
@media (max-width: 700px) {
    .cu-grid {
        grid-template-columns: minmax(0, 1fr);
    }
    .cu-toolbar {
        flex-direction: column;
        align-items: stretch;
    }
    .cu-search input {
        width: 100%;
    }
    .cu-point-list {
        grid-template-columns: minmax(0, 1fr);
    }
    .cu-cta-inner {
        flex-direction: column;
        align-items: flex-start;
    }
    .cu-cta-side {
        align-items: flex-start;
    }
}
@media (max-width: 600px) {
    .cud-nav {
        grid-template-columns: minmax(0, 1fr);
    }
    .cud-nav-next {
        text-align: left;
    }
    .cud-meta {
        grid-template-columns: minmax(0, 1fr);
    }
}