/* ============================================
   课程页面
   ============================================ */

/* ---------- 课程核心信息卡 ---------- */
.course-foundation-info {
  padding: 0 0 48px;
  margin-top: -24px;
}

@media (min-width: 768px) {
  .course-foundation-info {
    padding: 0 0 64px;
    margin-top: -32px;
  }
}

.foundation-info-wrap {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: 0 16px 48px rgba(0, 74, 186, .12);
  border: 1px solid var(--border-color);
}

@media (min-width: 768px) {
  .foundation-info-wrap {
    padding: 36px 32px;
  }
}

.foundation-info-header {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding-bottom: 20px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

@media (min-width: 768px) {
  .foundation-info-header {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.foundation-info-price {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.foundation-info-price-label {
  font-size: 12px;
  color: var(--text-light);
}

.foundation-info-price-value {
  font-size: 32px;
  font-weight: 800;
  color: var(--brand-primary);
  letter-spacing: -1px;
  line-height: 1.1;
}

.foundation-info-meta {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px 28px;
}

@media (min-width: 768px) {
  .foundation-info-meta {
    grid-template-columns: repeat(4, auto);
  }
}

.foundation-info-meta-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.foundation-info-meta-label {
  font-size: 12px;
  color: var(--text-light);
}

.foundation-info-meta-value {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
}

.foundation-info-meta-accent {
  color: var(--brand-primary);
  font-size: 18px;
}

.foundation-info-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.foundation-info-tags span {
  display: inline-block;
  padding: 5px 14px;
  font-size: 12px;
  font-weight: 500;
  color: var(--brand-primary);
  background: var(--brand-light);
  border-radius: 100px;
}

.foundation-info-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.foundation-cta-btn {
  display: inline-block;
  padding: 13px 32px;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  border-radius: 100px;
  transition: all var(--transition);
  box-shadow: 0 6px 20px rgba(0, 74, 186, .3);
}

.foundation-cta-btn:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(0, 74, 186, .4);
}

.foundation-cta-ghost {
  display: inline-block;
  padding: 13px 32px;
  font-size: 15px;
  font-weight: 600;
  color: var(--brand-primary);
  border: 1.5px solid var(--brand-primary);
  border-radius: 100px;
  transition: all var(--transition);
}

.foundation-cta-ghost:hover {
  color: #fff;
  background: var(--brand-primary);
}

/* ---------- 课程简介 ---------- */
.course-foundation-intro {
  padding: 48px 0;
}

@media (min-width: 768px) {
  .course-foundation-intro {
    padding: 64px 0;
  }
}

@media (min-width: 1024px) {
  .course-foundation-intro {
    padding: 80px 0;
  }
}

.foundation-intro-layout {
  display: block;
}

@media (min-width: 1024px) {
  .foundation-intro-layout {
    grid-template-columns: 1.2fr 1fr;
    gap: 48px;
  }
}

.foundation-intro-title {
  font-size: 24px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -.3px;
  margin: 10px 0 20px;
}

@media (min-width: 768px) {
  .foundation-intro-title {
    font-size: 28px;
  }
}

.foundation-intro-text {
  max-width: 80%;
  margin: 0 auto;
}

.foundation-intro-text p {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.85;
  margin-bottom: 16px;
}

.foundation-intro-target {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.foundation-target-card {
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px 22px;
}

.foundation-target-card-accent {
  border-color: var(--brand-primary);
  box-shadow: 0 4px 16px rgba(0, 74, 186, .08);
}

.foundation-target-label {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
}

.foundation-target-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.foundation-target-list li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.6;
}

.foundation-target-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand-primary);
  opacity: .5;
}

.foundation-target-card-accent .foundation-target-list li::before {
  background: var(--brand-accent);
  opacity: .8;
}



/* ---------- 课程保障（深蓝背景） ---------- */
.course-foundation-guarantee {
  padding: 56px 0;
  background: linear-gradient(135deg, #003a94 0%, #004aba 50%, #0062e0 100%);
  position: relative;
  overflow: hidden;
}

@media (min-width: 768px) {
  .course-foundation-guarantee {
    padding: 72px 0;
  }
}

@media (min-width: 1024px) {
  .course-foundation-guarantee {
    padding: 88px 0;
  }
}

.course-foundation-guarantee::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -80px;
  width: 350px;
  height: 350px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .05);
  pointer-events: none;
}

.guarantee-inner {
  position: relative;
  z-index: 1;
}

.guarantee-header {
  text-align: center;
  margin-bottom: 40px;
}

@media (min-width: 768px) {
  .guarantee-header {
    margin-bottom: 56px;
  }
}

.guarantee-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: rgba(255, 255, 255, .6);
  margin-bottom: 12px;
}

.guarantee-title {
  font-size: 24px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -.3px;
  margin-bottom: 10px;
}

@media (min-width: 768px) {
  .guarantee-title {
    font-size: 32px;
  }
}

.guarantee-desc {
  font-size: 15px;
  color: rgba(255, 255, 255, .7);
}

.guarantee-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 640px) {
  .guarantee-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .guarantee-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }
}

.guarantee-item {
  text-align: center;
  padding: 28px 20px;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .15);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(8px);
  transition: all var(--transition);
}

.guarantee-item:hover {
  background: rgba(255, 255, 255, .12);
  transform: translateY(-4px);
}

.guarantee-item-icon {
  font-size: 28px;
  margin-bottom: 14px;
}

.guarantee-item h3 {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.guarantee-item p {
  font-size: 13px;
  color: rgba(255, 255, 255, .7);
  line-height: 1.65;
}


/* ============================================
   底部转化（白底）
   ============================================ */
.course-cta {
  padding: 56px 0;
  background: #fff;
}

@media (min-width: 768px) {
  .course-cta {
    padding: 72px 0;
  }
}

.course-cta-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  text-align: center;
}

@media (min-width: 768px) {
  .course-cta-inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
    gap: 40px;
  }
}

.course-cta-text h2 {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -.3px;
  margin-bottom: 6px;
}

@media (min-width: 768px) {
  .course-cta-text h2 {
    font-size: 26px;
  }
}

.course-cta-text p {
  font-size: 15px;
  color: var(--text-sub);
}

.course-cta-btn {
  display: inline-block;
  padding: 16px 40px;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  border-radius: 100px;
  transition: all var(--transition);
  box-shadow: 0 6px 20px rgba(0, 74, 186, .3);
  white-space: nowrap;
  flex-shrink: 0;
}

.course-cta-btn:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(0, 74, 186, .4);
}

/* ============================================
   小屏适配
   ============================================ */
@media (max-width: 480px) {
  .class-block {
    padding: 26px 22px;
  }

  .class-block-featured {
    padding-top: 40px;
  }

  .class-block-head h3 {
    font-size: 17px;
  }

  .class-block-score {
    font-size: 19px;
  }
}