/* =============================================================================
   课程中心页（courses.htm）
   依赖：style.css 中的 :root 变量与 .container
   ============================================================================= */

.page-courses .course-main {
  padding-top: 0;
}

.course-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* -----------------------------------------------------------------------------
   内页 Banner（深色遮罩 + 白字，与学校简介页区分）
   ----------------------------------------------------------------------------- */
.course-hero {
  position: relative;
}

.course-hero-banner {
  position: relative;
  height: 500px;
  overflow: hidden;
  background: #0a1628;
}

.course-hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

.course-hero-scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    rgba(6, 18, 40, 0.88) 0%,
    rgba(6, 18, 40, 0.55) 45%,
    rgba(6, 18, 40, 0.35) 100%
  );
  pointer-events: none;
}

.course-hero-inner {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
}

.course-hero-copy {
  max-width: min(560px, 94vw);
  padding: 28px 0 36px;
}

.course-hero-title {
  margin: 0 0 18px;
  font-size: clamp(30px, 4.5vw, 44px);
  font-weight: 800;
  letter-spacing: 0.06em;
  color: #fff;
  line-height: 1.15;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.25);
}

.course-hero-lead {
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.92);
}

.course-breadcrumb {
  background: var(--zg-gray-100);
  border-bottom: 1px solid var(--zg-border);
}

.course-breadcrumb-inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 10px;
  padding: 12px 0 13px;
  font-size: 13px;
  color: var(--zg-text-muted);
}

.course-bc-link {
  color: var(--zg-text-secondary);
  transition: color 0.2s;
}

.course-bc-link:hover {
  color: var(--zg-blue);
}

.course-bc-sep {
  color: #b0b6bf;
}

.course-bc-current {
  color: var(--zg-text);
  font-weight: 600;
}

/* -----------------------------------------------------------------------------
   通用区块标题
   ----------------------------------------------------------------------------- */
.course-section {
  padding: clamp(56px, 8vw, 92px) 0 clamp(60px, 8.5vw, 96px);
}

.course-surface-white {
  background: var(--zg-white);
}

.course-surface-soft {
  position: relative;
  background: var(--zg-gray-50);
}

.course-surface-soft::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 96px;
  pointer-events: none;
  opacity: 0.38;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 96' preserveAspectRatio='none'%3E%3Cpath fill='%23c5d4e6' d='M0 62L200 48 400 72 600 44 800 70 1000 50 1200 68 1440 58V96H0z'/%3E%3C/svg%3E")
    center bottom / 100% 100% no-repeat;
}

.course-surface-muted {
  background: linear-gradient(180deg, #f0f3f7 0%, var(--zg-gray-50) 50%, #fafbfc 100%);
}

.course-section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto clamp(36px, 5vw, 48px);
}

.course-en {
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: #8a93a0;
  text-transform: uppercase;
}

.course-h2 {
  margin: 0 0 14px;
  font-size: clamp(22px, 2.8vw, 30px);
  font-weight: 800;
  color: var(--zg-text);
  line-height: 1.25;
}

.course-sublead {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: #5c6370;
}

/* -----------------------------------------------------------------------------
   学习路径四步
   ----------------------------------------------------------------------------- */
.course-path {
  list-style: none;
  margin: 0;
  padding: 8px 0 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px 16px;
  position: relative;
  max-width: 1080px;
  margin-left: auto;
  margin-right: auto;
}

.course-path::before {
  content: "";
  position: absolute;
  left: calc(12.5% - 0px);
  width: 75%;
  top: 39px;
  height: 2px;
  background: linear-gradient(90deg, var(--zg-blue) 0%, rgba(13, 110, 220, 0.35) 100%);
  border-radius: 1px;
  z-index: 0;
}

.course-path-step {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 0 6px;
}

.course-path-node {
  width: 56px;
  height: 56px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: var(--zg-white);
  border: 2px solid var(--zg-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--zg-blue);
  box-shadow: 0 6px 20px rgba(13, 110, 220, 0.12);
  position: relative;
}

.course-path-node::after {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--zg-blue);
  border: 2px solid #fff;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: -1;
  box-shadow: 0 0 0 3px rgba(13, 110, 220, 0.15);
}

/* 圆环内图标置于圆点之上：用双层结构更清晰 — 用伪元素圆点会挡图标，改为节点外环 */
.course-path-node::after {
  display: none;
}

.course-path-node {
  box-shadow: 0 0 0 4px rgba(13, 110, 220, 0.12), 0 8px 24px rgba(15, 35, 70, 0.08);
}

.course-path-step-name {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 800;
  color: var(--zg-text);
}

.course-path-desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: #6b7280;
}

/* -----------------------------------------------------------------------------
   专业领域卡片
   ----------------------------------------------------------------------------- */
.course-field-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px 24px;
}

.course-field-card {
  display: flex;
  flex-direction: column;
  background: var(--zg-white);
  border-radius: var(--zg-radius-lg);
  overflow: hidden;
  border: 1px solid var(--zg-border);
  box-shadow: var(--zg-shadow-card);
  transition: box-shadow 0.25s, transform 0.2s;
}

.course-field-card:hover {
  box-shadow: var(--zg-shadow-float);
  transform: translateY(-3px);
}

.course-field-fig {
  margin: 0;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--zg-gray-100);
}

.course-field-fig img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.course-field-body {
  padding: 20px 20px 22px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.course-field-name {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 800;
  color: var(--zg-text);
}

.course-field-summary {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.7;
  color: #5c6370;
  flex: 1;
}

.course-field-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 12px 16px;
  font-size: 14px;
  font-weight: 700;
  border-radius: var(--zg-radius-sm);
  border: 1px solid var(--zg-border);
  background: var(--zg-white);
  color: var(--zg-text-secondary);
  transition: color 0.2s, border-color 0.2s, background 0.2s, box-shadow 0.2s;
}

.course-field-btn:hover {
  border-color: var(--zg-blue);
  color: var(--zg-blue);
  box-shadow: 0 4px 14px rgba(13, 110, 220, 0.12);
}

.course-field-btn--primary {
  background: var(--zg-blue);
  border-color: var(--zg-blue);
  color: #fff;
}

.course-field-btn--primary:hover {
  background: var(--zg-blue-hover);
  border-color: var(--zg-blue-hover);
  color: #fff;
}

.course-field-btn-arrow {
  font-size: 15px;
  line-height: 1;
}

/* -----------------------------------------------------------------------------
   培养项目表格
   ----------------------------------------------------------------------------- */
.course-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--zg-radius-md);
  border: 1px solid var(--zg-border);
  box-shadow: var(--zg-shadow-card);
}

.course-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: 14px;
  background: var(--zg-white);
}

.course-table thead th {
  padding: 14px 18px;
  text-align: left;
  font-weight: 700;
  color: var(--zg-text);
  background: linear-gradient(180deg, #e8f2fc 0%, #dceaf8 100%);
  border-bottom: 1px solid #c5daf0;
}

.course-table tbody td {
  padding: 16px 18px;
  vertical-align: middle;
  color: #4a4f57;
  border-bottom: 1px solid var(--zg-border);
}

.course-table tbody tr:nth-child(even) td {
  background: #f7fafc;
}

.course-table tbody tr:nth-child(odd) td {
  background: var(--zg-white);
}

.course-table tbody tr:last-child td {
  border-bottom: 0;
}

.course-table-col-action {
  width: 110px;
  text-align: right;
  white-space: nowrap;
}

.course-table-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  background: var(--zg-blue);
  border-radius: var(--zg-radius-sm);
  transition: background 0.2s, box-shadow 0.2s;
}

.course-table-link:hover {
  background: var(--zg-blue-hover);
  box-shadow: 0 4px 12px rgba(13, 110, 220, 0.28);
}

/* -----------------------------------------------------------------------------
   学员案例：顶部 Tab + 大灰底内容区
   ----------------------------------------------------------------------------- */
.course-case-stage {
  max-width: none;
  width: 100%;
}

.course-case-tabs {
  display: flex;
  flex-wrap: nowrap;
  justify-content: center;
  gap: clamp(16px, 2.5vw, 28px);
  margin-bottom: 28px;
  overflow-x: auto;
  padding-bottom: 8px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.course-case-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 12px 10px;
  min-width: 0;
  flex-shrink: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  font: inherit;
  color: var(--zg-text-secondary);
  transition: color 0.2s, transform 0.15s;
  -webkit-tap-highlight-color: transparent;
}

.course-case-tab:hover,
.course-case-tab:focus-visible {
  color: var(--zg-blue);
  outline: none;
}

.course-case-tab.is-active {
  color: var(--zg-blue);
}

.course-case-tab-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--zg-gray-100);
  color: var(--zg-blue);
  border: 2px solid var(--zg-border);
  transition: background 0.2s, color 0.2s, border-color 0.2s, box-shadow 0.2s;
  overflow: hidden;
}

.course-case-tab-icon--photo {
  padding: 0;
  background: #dfe5ee;
}

.course-case-tab-icon--photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.course-case-tab.is-active .course-case-tab-icon,
.course-case-tab:hover .course-case-tab-icon {
  background: var(--zg-blue);
  color: #fff;
  border-color: var(--zg-blue);
  box-shadow: 0 6px 20px rgba(13, 110, 220, 0.28);
}

.course-case-tab-label {
  font-size: 12px;
  font-weight: 700;
  line-height: 1.3;
  white-space: nowrap;
  text-align: center;
  max-width: 11em;
  overflow: hidden;
  text-overflow: ellipsis;
}

.course-case-panels {
  position: relative;
}

.course-case-panel {
  display: none;
  padding: clamp(20px, 3vw, 28px);
  background: #eceff4;
  border-radius: var(--zg-radius-lg);
  border: 1px solid #dde3ec;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.75);
}

.course-case-panel.is-active {
  display: block;
}

.course-case-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr);
  gap: clamp(28px, 4vw, 52px);
  align-items: center;
}

.course-case-text {
  min-width: 0;
}

.course-case-switcher {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-top: 22px;
  padding-top: 4px;
}

.course-case-switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid var(--zg-border);
  border-radius: 999px;
  background: #fff;
  color: var(--zg-text-secondary);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s, box-shadow 0.2s;
}

.course-case-switch:hover {
  color: var(--zg-blue);
  border-color: var(--zg-blue);
  background: var(--zg-blue-soft);
}

.course-case-switch-meta {
  margin: 0;
  font-size: 14px;
  font-weight: 700;
  color: var(--zg-text-muted);
  min-width: 3.5em;
  text-align: center;
}

.course-case-switch-current {
  color: var(--zg-blue);
}

.course-case-kicker {
  margin: 0 0 12px;
  font-size: 13px;
  font-weight: 600;
  color: var(--zg-blue);
  letter-spacing: 0.04em;
}

.course-case-heading {
  margin: 0 0 16px;
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 800;
  color: var(--zg-text);
  line-height: 1.3;
}

.course-case-desc {
  margin: 0 0 22px;
  font-size: 15px;
  line-height: 1.85;
  color: #5c6370;
}

.course-case-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 700;
  color: var(--zg-blue);
  transition: gap 0.2s, color 0.2s;
}

.course-case-more:hover {
  color: var(--zg-blue-hover);
  gap: 10px;
}

.course-case-feature-fig {
  margin: 0;
  border-radius: var(--zg-radius-md);
  overflow: hidden;
  background: #dfe5ee;
  box-shadow: 0 8px 28px rgba(15, 35, 70, 0.08);
}

.course-case-feature-img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}

.course-case-thumbs-wrap {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 10px;
  width: 100%;
  margin-top: 2px;
}

.course-case-thumbs-swiper {
  flex: 1;
  min-width: 0;
  width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
}

/* 缩略图条不再由 Swiper 接管，用横向 flex + 原生滚动，避免与自定义左右键逻辑冲突 */
.course-case-thumbs-swiper .swiper-wrapper {
  display: flex !important;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: center;
  gap: 10px;
  transform: none !important;
  transition: none !important;
  width: max-content !important;
  box-sizing: border-box;
}

.course-case-thumbs-swiper .swiper-slide {
  width: auto !important;
  height: auto !important;
  margin: 0 !important;
  flex-shrink: 0;
}

.course-case-thumb-btn {
  display: block;
  padding: 0;
  margin: 0;
  border: 2px solid transparent;
  border-radius: var(--zg-radius-sm);
  overflow: hidden;
  cursor: pointer;
  background: #fff;
  line-height: 0;
  transition: border-color 0.2s, box-shadow 0.2s;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.course-case-thumb-btn img {
  width: 112px;
  height: 72px;
  object-fit: cover;
  display: block;
}

.course-case-thumb-btn:hover,
.course-case-thumb-btn:focus-visible {
  border-color: rgba(13, 110, 220, 0.45);
  outline: none;
}

.course-case-thumb-btn.is-current {
  border-color: var(--zg-blue);
  box-shadow: 0 4px 12px rgba(13, 110, 220, 0.2);
}

.course-case-thumb-nav {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  padding: 0;
  border: 1px solid var(--zg-border);
  border-radius: 50%;
  background: var(--zg-white);
  color: var(--zg-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
  position: relative;
  z-index: 2;
  pointer-events: auto;
}

.course-case-thumb-nav:hover {
  color: var(--zg-blue);
  border-color: var(--zg-blue);
  background: var(--zg-blue-soft);
}

.course-case-thumb-nav.swiper-button-disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

/* -----------------------------------------------------------------------------
   响应式
   ----------------------------------------------------------------------------- */
@media (max-width: 991px) {
  .course-field-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .course-path::before {
    display: none;
  }

  .course-path {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 20px;
    padding-top: 0;
  }

  .course-path-step {
    padding: 16px 14px;
    background: var(--zg-white);
    border-radius: var(--zg-radius-md);
    border: 1px solid var(--zg-border);
    box-shadow: var(--zg-shadow-card);
    text-align: left;
    display: grid;
    grid-template-columns: 56px 1fr;
    grid-template-rows: auto auto;
    column-gap: 16px;
    align-items: start;
  }

  .course-path-node {
    margin: 0;
    grid-row: 1 / span 2;
  }

  .course-path-step-name {
    margin: 0 0 6px;
  }

  .course-case-inner {
    grid-template-columns: 1fr;
  }

  .course-case-feature-fig {
    order: -1;
  }

  .course-case-switcher {
    flex-wrap: wrap;
    gap: 12px;
  }

  .course-case-switch span:not(:empty) {
    display: none;
  }
}

@media (max-width: 767px) {
  .course-hero-inner {
    align-items: flex-end;
  }

  .course-hero-copy {
    padding-bottom: 24px;
  }

  .course-field-grid {
    grid-template-columns: 1fr;
  }

  .course-path {
    grid-template-columns: 1fr;
  }

  .course-case-tabs {
    justify-content: flex-start;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 6px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
  }

  .course-case-tab {
    flex-shrink: 0;
  }

  .course-case-tab-icon {
    width: 48px;
    height: 48px;
  }

  .course-case-tab-label {
    font-size: 12px;
  }
}