/* ==========================================================
   线上学院首页 course.css
   - 继承 :root 变量（primary / navy / yellow / content-width / radius…），
     home.css 已全局导入，因此这里不重复定义。
   ========================================================== */

/* ============ Hero ============ */
.iti-course-hero {
    position: relative;
    background: var(--iti-bg);
    overflow: hidden;
    padding: 56px 0 96px;
}

.iti-course-hero-deco-left,
.iti-course-hero-deco-right {
    position: absolute;
    bottom: 0;
    pointer-events: none;
    z-index: 0;
}

.iti-course-hero-deco-left {
    left: 0;
    width: 220px;
    height: 80px;
    background:
        linear-gradient(135deg, transparent 50%, #0F1F3D 50%) 0 0/50% 100% no-repeat,
        linear-gradient(45deg,  #0F1F3D 50%, transparent 50%) 100% 0/50% 100% no-repeat,
        var(--iti-primary);
    clip-path: polygon(0 0, 100% 100%, 0 100%);
    opacity: 0.92;
}

.iti-course-hero-deco-right {
    right: 0;
    width: 160px;
    height: 60px;
    background: var(--iti-yellow);
    clip-path: polygon(100% 0, 0 100%, 100% 100%);
    opacity: 0.92;
}

.iti-course-hero-inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1.05fr 1fr;
    gap: 32px;
    align-items: center;
    min-height: 360px;
}

.iti-course-hero-badge {
    display: inline-block;
    background: var(--iti-bg-soft);
    color: var(--iti-primary);
    font-size: 14px;
    font-weight: 600;
    padding: 6px 18px;
    border-radius: 999px;
    margin-bottom: 24px;
}

.iti-course-hero-title {
    font-size: 38px;
    font-weight: 800;
    color: var(--iti-navy);
    line-height: 1.25;
    margin: 0 0 18px;
    max-width: 520px;
}

.iti-course-hero-desc {
    font-size: 16px;
    color: var(--iti-text-light);
    margin: 0;
    max-width: 480px;
}

.iti-course-hero-image {
    position: relative;
    overflow: hidden;
    height: 360px;
    background: linear-gradient(135deg, var(--iti-bg-soft), var(--iti-bg-soft-2));
}

.iti-course-hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* ============ 三特性卡片 ============ */
.iti-course-features {
    background: #ecf4f5;
    padding: 56px 0;
}

.iti-course-feature-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.iti-course-feature {
    display: flex;
    /* align-items: center; */
    color: #fff;
    border-radius: var(--iti-radius-lg);
    padding: 16px 18px;
    transition: transform var(--iti-transition), box-shadow var(--iti-transition);
}
.iti-course-feature-list .iti-course-feature:nth-child(1){
    background-color: var(--iti-primary);
}
.iti-course-feature-list .iti-course-feature:nth-child(2) {
    background-color: var(--iti-yellow);
}
.iti-course-feature-list .iti-course-feature:nth-child(3) {
    background-color: #ffffff;
}

/* .iti-course-feature:hover {
    transform: translateY(-4px);
    box-shadow: var(--iti-shadow-md);
} */

.iti-course-feature-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--iti-radius-lg);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.iti-course-feature-icon img {
    height: 44px;
    color: #fff;

}

.iti-course-feature-box {
    margin-left: 20px;
    width: 70%;
    display: flex;
    flex-direction: column;
}
.iti-course-feature-title {
    font-size: 16px;
    font-weight: 700;
    margin: 0 0 12px;
    line-height: 1.4;
    color: #000;
}

.iti-course-feature-desc {
    font-size: 12px;
    line-height: 1.3;
    margin: 0;
    color: #000;
}

/* ============ ITI Curriculum 介绍 ============ */
.iti-course-curriculum {
    position: relative;
    background: var(--iti-bg);
    padding: 72px 0;
    overflow: hidden;
}

.iti-course-curriculum-deco {
    position: absolute;
    right: 0;
    bottom: -140px;
}

.iti-course-curriculum-inner {
    text-align: center;
    position: relative;
    z-index: 1;
}

.iti-course-curriculum-title {
    font-size: 32px;
    font-weight: 800;
    margin: 0 0 16px;
    letter-spacing: 1px;
}

.iti-course-curriculum-desc {
    font-size: 16px;
    margin: 0 0 32px;
}

/* ============ 通用 section ============ */
.iti-course-section {
    padding: 64px 0;
}

.iti-course-section--white {
    background: var(--iti-bg);
}

.iti-course-section--soft {
    background: var(--iti-bg-soft);
}

.iti-course-section-head {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
}

.iti-course-section-head--centered {
    justify-content: center;
    position: relative;
}

.iti-course-section-head--centered .iti-carousel-controls {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
}

.iti-course-section-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--iti-navy);
    margin: 0;
}

.iti-course-section-side {
    font-size: 23px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 20px;
}

.iti-course-section-link {
    font-size: 14px;
    color: var(--iti-text);
    text-decoration: none;
    padding-bottom: 4px;
    border-bottom: 1px solid var(--iti-border);
    transition: color var(--iti-transition), border-color var(--iti-transition);
}

.iti-course-section-link:hover {
    color: var(--iti-primary);
    border-color: var(--iti-primary);
}

/* ============ 轮播 ============ */
.iti-carousel-controls {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 12px;
}

.iti-carousel-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #fff;
    border: 1px solid var(--iti-border);
    color: var(--iti-text-light);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--iti-transition);
}

.iti-carousel-btn:hover:not(:disabled) {
    background: var(--iti-primary);
    color: #fff;
    border-color: var(--iti-primary);
}

.iti-carousel-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.iti-carousel-btn svg {
    width: 18px;
    height: 18px;
}

.iti-carousel {
    position: relative;
    overflow: hidden;
    padding-bottom: 10px;
    padding-right: 10px;
    margin-top: 20px;
}

.iti-carousel-track {
    display: flex;
    align-items: stretch; 
    gap: 24px;
    transition: transform 0.4s ease;
    will-change: transform;
}

/* ============ 课程卡 ============ */
.iti-course-card {
    flex: 0 0 calc((100% - 24px * 3) / 4);  /* 一屏 4 张，gap 24px */
    background: #fff;
    border-radius: var(--iti-radius-lg);
    box-shadow: #bbdadc 0px 0px 10px 0px;
    transition: transform var(--iti-transition), box-shadow var(--iti-transition);
    display: flex;
    flex-direction: column;
}

.iti-course-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--iti-shadow-md);
}

.iti-course-card-thumb,
.iti-course-card-cover {
    border-radius: 6px;
    position: relative;
    background: #fff;
    padding: 16px 20px;

}

/* 课程精选：几何封面（复用 course-detail.css 的 iti-cd-cover--primary/yellow/navy 配色）
   覆盖上面的 padding / 白底，让渐变封面正常铺满 */
.iti-course-card--featured .iti-course-card-cover {
    padding: 14px;
    height: 148px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-radius: 6px;
}

.iti-course-card--featured .iti-course-card-cover .iti-cd-cover-logo {
    position: relative;
    z-index: 1;
    font-size: 26px;
    font-weight: 800;
    color: #fff;
    letter-spacing: 2px;
    text-shadow: 0 2px 8px rgba(15, 31, 61, 0.25);
}

.iti-course-card--featured .iti-course-card-cover .iti-cd-cover-duration {
    position: absolute;
    bottom: 8px;
    right: 10px;
    z-index: 2;
    color: #fff;
    font-size: 10px;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: 4px;
    font-variant-numeric: tabular-nums;
}


.iti-course-card-thumb img,
.iti-course-card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.iti-course-card-cover .iti-course-card-member {
    position: absolute;
    top: 12px;
    right: 12px;
    background: var(--iti-red);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 4px;
    letter-spacing: 0.5px;
}

.iti-course-card-body {
    padding: 0 16px 16px;
    display: flex;
    flex-direction: column;
    flex: 1;
    

}
.iti-course-card-body1 {
    padding: 0 20px 24px;
    display: flex;
    justify-content: space-between;
}
.iti-course-card-body-box1 {
    display: flex;
    justify-content: space-between;

}
.iti-course-card-body-box2 {
    display: flex;
    justify-content: space-between;
    margin-top: 12px;
    align-items: center;
    margin-top: auto;
}
.iti-course-card-member{
    font-size: 12px;
    color: #a11761;
    flex-shrink: 0;
}

.iti-course-card-master {
    font-size: 12px;
    color: #a8346e;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.6px;
}

.iti-course-card-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--iti-navy);
    margin: 0;
    line-height: 1.4;
}

.iti-course-card-meta {
    font-size: 13px;
    color: var(--iti-text-light);
    position: relative;
    padding-left: 14px;
    line-height: 1.1;
}
.iti-course-card-meta::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 10px;
    height: 10px;
    background: url('/assets/images/course/dingwei.png') no-repeat center;
    background-size: contain;
}

.iti-course-card .iti-btn {
    align-self: flex-end;

}

/* ============ CTA ============ */
.iti-course-cta {
    background:url('/assets/images/course/cta-bg.png') no-repeat center;
    padding: 28px 0;
    text-align: center;
    border-bottom: 4px solid;
    border-image: linear-gradient(to right, 
    #02569B 0%, #02569B 40%,
    #00b2b8 40%, #00b2b8 80%,
    #d2da16 80%, #d2da16 100%
) 1;
}

.iti-course-cta-title {
    font-size: 30px;
    font-weight: 800;
    color: #000;
    margin: 0 0 32px;
    line-height: 1.4;
}

/* CTA 按钮沿用全局主按钮悬停效果（加深青色 + 轻微上浮），
   与「课程精选」卡片的「查看」按钮保持一致 */
.iti-course-cta .iti-btn-primary {
    color: #fff;
}

/* ============ 按钮微调 ============ */
.iti-btn-pill { border-radius: 999px; }
.iti-btn-sm   { padding: 6px 18px; font-size: 13px; }
.iti-btn-lg   { padding: 12px 36px; font-size: 16px; }

/* ============ 响应式 ============ */
@media (max-width: 1023px) {
    .iti-course-hero { padding: 40px 0 64px; }
    .iti-course-hero-inner {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .iti-course-hero-title { font-size: 28px; margin: 0 auto 16px; }
    .iti-course-hero-desc  { margin: 0 auto; }
    .iti-course-hero-image { height: 220px; order: -1; }
    .iti-course-hero-deco-left,
    .iti-course-hero-deco-right { display: none; }

    .iti-course-feature-list {
        grid-template-columns: 1fr;
    }

    .iti-course-curriculum-title { font-size: 24px; }
    .iti-course-section { padding: 48px 0; }
    .iti-course-section-title { font-size: 22px; }
    .iti-course-card { flex-basis: calc((100% - 24px) / 2); }
    .iti-course-section-head--centered .iti-carousel-controls { display: none; }
    .iti-course-cta-title { font-size: 22px; padding: 0 8px; }
}

@media (min-width: 1024px) and (max-width: 1199px) {
    .iti-course-card { flex-basis: calc((100% - 24px * 2) / 3); }
}