:root {
  --color-primary: #1A56DB;
  --color-primary-hover: #1E40AF;
  --color-emphasis: #E85D04;
  --color-emphasis-hover: #C24A00;
  --color-success: #059669;
  --color-warm: #F59E0B;
  --color-neutral-title: #111827;
  --color-neutral-body: #4B5563;
  --color-neutral-secondary: #9CA3AF;
  --color-neutral-bg: #F9FAFB;
  --color-neutral-card: #FFFFFF;
  --color-neutral-border: #E5E7EB;

  --shadow-card: 0px 1px 3px rgba(0,0,0,0.1), 0px 1px 2px rgba(0,0,0,0.06);
  --shadow-card-hover: 0px 10px 15px rgba(0,0,0,0.1), 0px 4px 6px rgba(0,0,0,0.05);
  --shadow-nav: 0px 1px 3px rgba(0,0,0,0.05);
  --shadow-modal: rgba(0,0,0,0.5);

  --radius-btn: 8px;
  --radius-card: 12px;
  --radius-lg: 16px;

  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 36px;
  --spacing-xl: 54px;
  --spacing-2xl: 72px;
  --spacing-3xl: 96px;

  --font-hero: 48px;
  --font-h2: 32px;
  --font-card-title: 20px;
  --font-body: 17px;
  --font-number: 40px;
  --font-btn: 17px;

  --max-width-desktop: 1200px;
  --max-width-tablet: 960px;
  --max-width-mobile: 720px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: var(--font-body);
  line-height: 1.6;
  color: var(--color-neutral-body);
  background-color: var(--color-neutral-bg);
  overflow-wrap: break-word;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--color-primary-hover);
}

img {
  max-width: 100%;
  height: auto;
  loading: lazy;
}

.container {
  max-width: var(--max-width-desktop);
  margin: 0 auto;
  padding: 0 var(--spacing-2xl);
}

@media (max-width: 1365px) {
  .container {
    max-width: var(--max-width-tablet);
    padding: 0 var(--spacing-xl);
  }
}

@media (max-width: 1023px) {
  .container {
    max-width: var(--max-width-mobile);
    padding: 0 var(--spacing-md);
  }
}

@media (max-width: 767px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
}

.h1 { font-size: var(--font-hero); font-weight: 700; line-height: 1.2; color: var(--color-neutral-title); }
.h2 { font-size: var(--font-h2); font-weight: 700; line-height: 1.25; color: var(--color-neutral-title); }
.h3 { font-size: var(--font-card-title); font-weight: 600; line-height: 1.4; color: var(--color-neutral-title); }

@media (max-width: 767px) {
  .h1 { font-size: 32px; }
  .h2 { font-size: 24px; }
  .h3 { font-size: 18px; }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-size: var(--font-btn);
  font-weight: 500;
  border-radius: var(--radius-btn);
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  min-height: 44px;
  min-width: 44px;
}

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

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

.btn-emphasis {
  background-color: var(--color-emphasis);
  color: white;
}

.btn-emphasis:hover {
  background-color: var(--color-emphasis-hover);
  color: white;
}

.btn-outline {
  background-color: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}

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

.card {
  background: var(--color-neutral-card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: var(--spacing-md);
  transition: box-shadow 0.2s;
}

.card:hover {
  box-shadow: var(--shadow-card-hover);
}

/* 带图片的卡片样式 */
.card-with-image {
  padding: 0;
  overflow: hidden;
}

.card-image {
  width: 100%;
  height: 140px;
  object-fit: cover;
  display: block;
}

.card-content {
  padding: var(--spacing-md);
}

/* 专业卡片：截图风格布局 */
.program-card {
  position: relative;
}

.program-card .program-image {
  width: 100%;
  height: 140px;
  object-fit: cover;
  display: block;
}

.program-card .program-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-top: var(--spacing-sm);
  margin-bottom: var(--spacing-xs);
}

.program-card .program-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-neutral-title);
  line-height: 1.3;
  flex: 1;
}

.program-card .program-hot {
  background: var(--color-emphasis);
  color: white;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 12px;
  white-space: nowrap;
  flex-shrink: 0;
  margin-left: 8px;
}

.program-card .program-status {
  display: inline-block;
  background: var(--color-success);
  color: white;
  font-size: 12px;
  font-weight: 500;
  padding: 2px 10px;
  border-radius: 12px;
  margin-bottom: var(--spacing-sm);
}

.program-card .program-status.status-warm {
  background: var(--color-warm);
}

.program-card .program-status.status-primary {
  background: var(--color-primary);
}

.program-card .program-desc {
  color: var(--color-neutral-body);
  font-size: 14px;
  line-height: 1.5;
  margin-bottom: var(--spacing-sm);
}

.program-card .program-meta {
  list-style: none;
  padding: 0;
  margin: 0;
}

.program-card .program-meta li {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--color-neutral-body);
  margin-bottom: 6px;
}

.program-card .program-meta li:last-child {
  margin-bottom: 0;
}

.program-card .program-meta .meta-icon {
  font-size: 16px;
  flex-shrink: 0;
}

.card-content {
  padding: var(--spacing-md);
}

/* 课程详情：SaaS 落地页风格 */
.course-section {
  max-width: 800px;
  margin: 0 auto;
}

.course-section .course-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-neutral-title);
}

@media (max-width: 767px) {
  .course-section .course-title {
    font-size: 26px;
  }
}

.course-section .course-intro {
  color: var(--color-neutral-body);
  font-size: 16px;
  margin-top: var(--spacing-sm);
}

/* 痛点区块 */
.pain-points {
  margin-top: var(--spacing-xl);
}

.pain-points .section-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--color-neutral-title);
  margin-bottom: var(--spacing-sm);
}

.pain-points .section-label .label-icon {
  font-size: 20px;
}

.pain-points ul {
  list-style: none;
  padding: 0;
}

.pain-points li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
  font-size: 15px;
  color: var(--color-neutral-body);
  line-height: 1.6;
}

.pain-points li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-emphasis);
}

/* 解决方案区块 */
.solutions {
  margin-top: var(--spacing-xl);
}

.solutions .section-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--color-neutral-title);
  margin-bottom: var(--spacing-sm);
}

.solutions .section-label .label-icon {
  font-size: 20px;
}

.solutions ul {
  list-style: none;
  padding: 0;
}

.solutions li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 12px;
  font-size: 15px;
  color: var(--color-neutral-body);
  line-height: 1.6;
}

.solutions li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-success);
  color: white;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 学习成果区块 */
.outcomes {
  margin-top: var(--spacing-xl);
}

.outcomes .section-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--color-neutral-title);
  margin-bottom: var(--spacing-md);
}

.outcomes .section-label .label-icon {
  font-size: 20px;
}

.outcomes-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-sm);
}

@media (max-width: 767px) {
  .outcomes-grid {
    grid-template-columns: 1fr;
  }
}

.outcome-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: var(--spacing-sm);
  background: #F0FDF4;
  border: 1px solid #BBF7D0;
  border-radius: var(--radius-btn);
  font-size: 14px;
  color: var(--color-neutral-body);
  line-height: 1.5;
}

.outcome-item .check-icon {
  color: var(--color-success);
  font-size: 16px;
  flex-shrink: 0;
  margin-top: 1px;
}

/* 课程大纲区块 */
.curriculum {
  margin-top: var(--spacing-xl);
}

.curriculum .section-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--color-neutral-title);
  margin-bottom: var(--spacing-md);
}

.curriculum .section-label .label-icon {
  font-size: 20px;
}

.curriculum-list {
  list-style: none;
  padding: 0;
}

.curriculum-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--color-neutral-border);
  font-size: 15px;
  color: var(--color-neutral-body);
  line-height: 1.6;
}

.curriculum-list li:last-child {
  border-bottom: none;
}

.curriculum-list .step-num {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-primary);
  color: white;
  font-size: 14px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}

/* CTA 区块 */
.course-cta {
  margin-top: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, #EDE9FE 0%, #DBEAFE 100%);
  border-radius: var(--radius-lg);
  text-align: center;
}

.course-cta .cta-text {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-neutral-title);
  margin-bottom: var(--spacing-sm);
}

.course-cta .cta-sub {
  font-size: 14px;
  color: var(--color-neutral-secondary);
  margin-bottom: var(--spacing-md);
}

/* 教师头像样式 */
.teacher-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto var(--spacing-sm);
  display: block;
  border: 3px solid var(--color-primary);
}

/* 师资快照：桌面端 4 列网格 */
.teachers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
}

/* 师资名片卡片 — 简洁白卡风格 */
.teacher-card {
  background: var(--color-neutral-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: var(--spacing-xl) var(--spacing-md) var(--spacing-md);
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
}

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

/* 教师真实照片（替代姓氏圆） */
.teacher-card .teacher-photo {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center center;
  margin: 0 auto var(--spacing-md);
  display: block;
  border: 4px solid var(--color-neutral-border);
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

/* 姓氏圆头像 */
.teacher-card .teacher-avatar-circle {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-md);
  font-size: 48px;
  font-weight: 700;
  color: white;
}

.teacher-card .teacher-avatar-circle.bg-tech {
  background: linear-gradient(135deg, #1A56DB, #7C3AED);
}

.teacher-card .teacher-avatar-circle.bg-design {
  background: linear-gradient(135deg, #E85D04, #F59E0B);
}

.teacher-card .teacher-avatar-circle.bg-edu {
  background: linear-gradient(135deg, #059669, #10B981);
}

.teacher-card .teacher-name {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-neutral-title);
  margin-bottom: 4px;
}

.teacher-card .teacher-role {
  font-size: 16px;
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: var(--spacing-md);
}

/* 信息行 */
.teacher-card .teacher-info {
  text-align: left;
  padding: 0 var(--spacing-xs);
}

.teacher-card .teacher-info .info-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 12px;
  font-size: 14px;
  color: var(--color-neutral-body);
  line-height: 1.5;
}

.teacher-card .teacher-info .info-row:last-child {
  margin-bottom: 0;
}

.teacher-card .teacher-info .info-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  margin-top: 2px;
}

.teacher-card .teacher-divider {
  border: none;
  border-top: 1px solid var(--color-neutral-border);
  margin: var(--spacing-md) 0 var(--spacing-sm);
}

/* 手机端横向滑动 */
@media (max-width: 767px) {
  .teachers-grid {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    gap: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    scrollbar-width: none;
  }

  .teachers-grid::-webkit-scrollbar {
    display: none;
  }

  .teacher-card {
    flex: 0 0 85%;
    max-width: 320px;
    scroll-snap-align: center;
    margin: 0 auto;
  }
}

/* 企业Logo样式 */
.company-logo {
  width: 100px;
  height: 100px;
  object-fit: contain;
  opacity: 0.8;
  transition: opacity 0.3s, transform 0.3s;
  filter: grayscale(30%);
}

.company-logo:hover {
  opacity: 1;
  transform: scale(1.1);
  filter: grayscale(0%);
}

.company-logo-text {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-neutral-secondary);
  padding: 12px 24px;
  border-radius: 8px;
  background: #f8f9fa;
  border: 1px solid var(--color-neutral-border);
  transition: all 0.2s;
  white-space: nowrap;
}
.company-logo-text:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: rgba(59, 130, 246, 0.04);
}

/* 大图样式 */
.section-banner {
  width: 100%;
  height: 300px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-xl);
}

.header {
  background: var(--color-neutral-card);
  box-shadow: var(--shadow-nav);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.logo img {
  height: 48px;
  width: auto;
  object-fit: contain;
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  display: none;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--color-neutral-body);
  font-weight: 500;
  padding: var(--spacing-xs) 0;
  position: relative;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width 0.2s;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  padding: var(--spacing-xs);
  min-height: 44px;
  min-width: 44px;
}

@media (max-width: 1023px) {
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-neutral-card);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 0 24px;
    gap: 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border-bottom: 1px solid var(--color-neutral-border);
  }

  .nav.active {
    display: flex;
  }

  .nav-link {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    width: 100%;
    padding: 14px 24px 14px 48px;
    font-size: 15px;
    color: var(--color-neutral-secondary);
    text-align: left;
    border-radius: 0;
    min-height: unset;
    position: relative;
    transition: all 0.2s;
  }

  .nav-link::after {
    display: none;
  }

  .nav-link::before {
    content: '>';
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 14px;
    color: var(--color-neutral-border);
    transition: all 0.2s;
  }

  .nav-link:hover {
    color: var(--color-primary);
    background: rgba(59, 130, 246, 0.04);
  }

  .nav-link.active {
    color: var(--color-primary);
    background: rgba(59, 130, 246, 0.08);
    font-weight: 600;
  }

  .nav-link.active::before {
    content: '';
    left: 0;
    top: 0;
    transform: none;
    width: 3px;
    height: 100%;
    background: var(--color-primary);
    border-radius: 0 2px 2px 0;
    font-size: 0;
  }

  .mobile-menu-btn {
    display: block;
  }
}

.footer {
  background: var(--color-neutral-title);
  color: white;
  padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

@media (max-width: 1023px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .footer {
    display: none;
  }
}

.footer-col h4 {
  color: white;
  font-size: 18px;
  margin-bottom: var(--spacing-sm);
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: var(--spacing-xs);
}

.footer-col a {
  color: var(--color-neutral-secondary);
}

.footer-col a:hover {
  color: white;
}

.footer-bottom {
  border-top: 1px solid var(--color-neutral-body);
  padding-top: var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.footer-contact p {
  color: var(--color-neutral-secondary);
  margin-bottom: var(--spacing-xs);
}

.floating-bar {
  position: fixed;
  right: var(--spacing-md);
  bottom: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  z-index: 90;
}

@media (max-width: 767px) {
  .floating-bar {
    display: none;
  }
}

.floating-item {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  box-shadow: var(--shadow-card);
}

.floating-item:hover {
  background: var(--color-primary-hover);
  transform: scale(1.1);
}

.mobile-fixed-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: white;
  box-shadow: 0 -2px 8px rgba(0,0,0,0.08);
  padding: 12px 16px;
  padding-bottom: calc(12px + env(safe-area-inset-bottom));
  z-index: 90;
}

@media (max-width: 767px) {
  .mobile-fixed-bar {
    display: flex;
    gap: 10px;
    align-items: center;
  }
}

.mobile-fixed-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border-radius: 12px;
  transition: all 0.2s;
}

.phone-btn {
  flex: 0 0 120px;
  flex-direction: column;
  gap: 2px;
  padding: 8px 4px;
  background: #f0f7ff;
  color: var(--color-primary);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.phone-btn:hover {
  background: #e0effe;
}

.mobile-btn-icon {
  font-size: 20px;
  line-height: 1;
}

.mobile-btn-text {
  font-size: 12px;
  white-space: nowrap;
}

.cta-btn .mobile-btn-text {
  font-size: 23px;
  font-weight: 600;
}

.cta-btn {
  flex: 1;
  padding: 18px 30px;
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: white;
  font-weight: 600;
  font-size: 23px;
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

.cta-btn:hover {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
}

.hero {
  background: linear-gradient(180deg, #EFF6FF 0%, #F9FAFB 100%);
  padding: var(--spacing-3xl) 0;
  text-align: center;
}

.hero h1 {
  margin-bottom: var(--spacing-sm);
}

.hero-subtitle {
  font-size: 20px;
  color: var(--color-neutral-body);
  margin-bottom: var(--spacing-xl);
}

@media (max-width: 767px) {
  .hero {
    padding: var(--spacing-xl) 0;
  }
  .hero-subtitle {
    font-size: 16px;
  }
}

.section {
  padding: 30px 0;
}

@media (max-width: 767px) {
  .section {
    padding: 24px 0;
  }
}

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

.section-header h2 {
  margin-bottom: var(--spacing-sm);
}

.section-header p {
  color: var(--color-neutral-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

/* 横向滚动行 — 桌面端正常网格，手机端左右滑动 */
.scroll-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

@media (max-width: 767px) {
  .scroll-row {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    gap: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    scrollbar-width: none;
  }
  .scroll-row::-webkit-scrollbar {
    display: none;
  }
  .scroll-row > * {
    flex: 0 0 80%;
    max-width: 300px;
    scroll-snap-align: center;
  }
}

@media (max-width: 1023px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .grid-4, .grid-3, .grid-2 {
    grid-template-columns: 1fr;
  }
}

.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-btn);
  font-size: 12px;
  font-weight: 500;
}

.badge-primary {
  background: var(--color-primary);
  color: white;
}

.badge-warm {
  background: var(--color-warm);
  color: white;
}

.badge-success {
  background: var(--color-success);
  color: white;
}

.badge-emphasis {
  background: var(--color-emphasis);
  color: white;
}

.tag {
  display: inline-block;
  padding: 4px 8px;
  border: 1px solid var(--color-neutral-border);
  border-radius: 4px;
  font-size: 12px;
  color: var(--color-neutral-secondary);
}

/* ==================== 表单样式 ==================== */

.form-group {
  margin-bottom: var(--spacing-sm);
  display: flex;
  align-items: center;
  gap: 12px;
}

.form-label {
  flex: 0 0 90px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-neutral-title);
  margin-bottom: 0;
  white-space: nowrap;
  text-align: left;
}

.form-input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--color-neutral-border);
  border-radius: 8px;
  font-size: var(--font-body);
  color: var(--color-neutral-body);
  background: white;
  transition: border-color 0.2s, box-shadow 0.2s;
  min-height: 44px;
}

.form-input::placeholder {
  color: var(--color-neutral-secondary);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
}

.form-select {
  flex: 1;
  padding: 10px 40px 10px 14px;
  border: 1px solid var(--color-neutral-border);
  border-radius: 8px;
  font-size: var(--font-body);
  color: var(--color-neutral-body);
  background: white url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%239CA3AF' d='M1.41 0L6 4.58 10.59 0 12 1.41l-6 6-6-6z'/%3E%3C/svg%3E") no-repeat right 14px center;
  background-size: 12px;
  cursor: pointer;
  min-height: 44px;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
}

.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
}

.form-textarea {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--color-neutral-border);
  border-radius: 8px;
  font-size: var(--font-body);
  color: var(--color-neutral-body);
  background: white;
  transition: border-color 0.2s, box-shadow 0.2s;
  min-height: 100px;
  resize: vertical;
  font-family: inherit;
}

.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
}

/* 表单桌面端：标题显示 */
@media (min-width: 768px) {
  form h3, form .h3 {
    display: block;
    margin-bottom: var(--spacing-md);
  }
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 14px;
  color: var(--color-neutral-secondary);
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--color-neutral-secondary);
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

.breadcrumb span {
  color: var(--color-neutral-title);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-md);
}

@media (max-width: 1023px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
  }
}

.stat-card {
  text-align: center;
  padding: var(--spacing-md);
}

.stat-number {
  font-size: var(--font-number);
  font-weight: 700;
  color: var(--color-success);
  line-height: 1.2;
}

.stat-label {
  color: var(--color-neutral-secondary);
  font-size: 14px;
  margin-top: var(--spacing-xs);
}

.timeline {
  position: relative;
  padding-left: var(--spacing-xl);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-primary);
}

.timeline-item {
  position: relative;
  margin-bottom: var(--spacing-lg);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--spacing-xl) - 5px);
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 2px solid white;
}

.timeline-item h4 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
}

.timeline-item p {
  color: var(--color-neutral-body);
  font-size: 14px;
}

.tab-nav {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--color-neutral-border);
  flex-wrap: wrap;
}

.tab-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  background: none;
  border: none;
  font-size: var(--font-body);
  font-weight: 500;
  color: var(--color-neutral-body);
  cursor: pointer;
  position: relative;
  min-height: 44px;
}

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

.tab-btn.active {
  color: var(--color-primary);
}

.tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
}

/* FAQ 分类导航 */
.faq-category-nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.faq-category-nav::-webkit-scrollbar {
  display: none;
}
.faq-cat-btn {
  flex-shrink: 0;
  padding: 8px 16px;
  border-radius: 20px;
  border: 1px solid var(--color-neutral-border);
  background: white;
  font-size: 14px;
  color: var(--color-neutral-secondary);
  text-decoration: none;
  white-space: nowrap;
  transition: all 0.2s;
}
.faq-cat-btn.active,
.faq-cat-btn:hover {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

/* FAQ 分类标题 */
.faq-cat-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-neutral-title);
  margin: var(--spacing-lg) 0 var(--spacing-md);
  padding-left: 12px;
  border-left: 3px solid var(--color-primary);
}
.faq-cat-title:first-child {
  margin-top: 0;
}

/* FAQ 手风琴 */
.faq-item {
  border: 1px solid var(--color-neutral-border);
  border-radius: 8px;
  margin-bottom: 8px;
  background: white;
  overflow: hidden;
}
.faq-question {
  padding: 14px 40px 14px 14px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-neutral-title);
  cursor: pointer;
  list-style: none;
  position: relative;
  line-height: 1.5;
  transition: background 0.2s;
}
.faq-question::-webkit-details-marker {
  display: none;
}
.faq-question::after {
  content: '+';
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  font-weight: 300;
  color: var(--color-primary);
  transition: transform 0.2s;
}
details[open] .faq-question::after {
  content: '−';
}
.faq-question:hover {
  background: #f8fafc;
}
.faq-answer {
  padding: 0 14px 14px;
  color: var(--color-neutral-body);
  font-size: 14px;
  line-height: 1.7;
  border-top: 1px solid var(--color-neutral-border);
}
.faq-answer p {
  margin: 8px 0;
}
.faq-answer ol,
.faq-answer ul {
  padding-left: 20px;
  margin: 8px 0;
}
.faq-answer li {
  margin-bottom: 4px;
}

/* FAQ 分类区域间距 */
.faq-category + .faq-category {
  margin-top: var(--spacing-xl);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.countdown {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--color-warm);
  color: white;
  border-radius: var(--radius-btn);
  font-weight: 500;
}

.progress-bar {
  height: 8px;
  background: var(--color-neutral-border);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--color-success);
  border-radius: 4px;
  transition: width 0.3s;
}

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--shadow-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  max-width: 480px;
  width: 90%;
  position: relative;
  transform: scale(0.9);
  transition: transform 0.3s;
}

.modal-overlay.active .modal {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--color-neutral-secondary);
  min-width: 44px;
  min-height: 44px;
}

.modal-close:hover {
  color: var(--color-neutral-title);
}

.modal h3 {
  margin-bottom: var(--spacing-sm);
}

.modal p {
  color: var(--color-neutral-body);
  margin-bottom: var(--spacing-md);
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

@media (max-width: 767px) {
  .hide-mobile { display: none !important; }
}

@media (min-width: 768px) {
  .show-mobile-only { display: none !important; }
}

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

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

@keyframes countUp {
  from { opacity: 0; }
  to { opacity: 1; }
}

.animate-count {
  animation: countUp 0.5s ease-out;
}

/* ==================== 桌面端 VI 增强（大字体、高可读性） ==================== */

@media (min-width: 1024px) {
  body {
    font-size: 18px;
    line-height: 1.7;
  }

  .h1 { font-size: 56px; }
  .h2 { font-size: 38px; }
  .h3 { font-size: 24px; }

  .hero-subtitle {
    font-size: 22px;
  }

  .nav-link {
    font-size: 17px;
  }

  .card {
    padding: 12px;
  }

  .teacher-card {
    padding: 24px 6px 6px;
  }

  .program-card .program-title {
    font-size: 22px;
  }

  .program-card .program-desc,
  .program-card .program-meta li {
    font-size: 16px;
  }

  .teacher-card .teacher-name {
    font-size: 24px;
  }

  .teacher-card .teacher-role {
    font-size: 17px;
  }

  .teacher-card .teacher-info .info-row {
    font-size: 16px;
  }

  .btn {
    font-size: 17px;
    padding: 14px 28px;
  }

  .form-label {
    font-size: 16px;
  }

  .form-input,
  .form-select,
  .form-textarea {
    font-size: 17px;
    padding: 12px 16px;
  }

  .breadcrumb {
    font-size: 16px;
  }

  .stat-label {
    font-size: 16px;
  }

  .section-header p {
    font-size: 18px;
  }

  .pain-points li,
  .solutions li {
    font-size: 17px;
  }

  .outcome-item {
    font-size: 16px;
  }

  .curriculum-list li {
    font-size: 17px;
  }

  .course-cta .cta-text {
    font-size: 20px;
  }

  .course-section .course-intro {
    font-size: 18px;
  }

  .faq-question {
    font-size: 17px;
  }

  .faq-answer {
    font-size: 16px;
  }

  .footer-col h4 {
    font-size: 19px;
  }

  .logo-text {
    font-size: 22px;
  }

  .badge {
    font-size: 13px;
    padding: 5px 14px;
  }

  .company-logo-text {
    font-size: 19px;
  }

  .tab-btn {
    font-size: 17px;
  }

  .pain-points .section-label,
  .solutions .section-label,
  .outcomes .section-label,
  .curriculum .section-label {
    font-size: 20px;
  }
}

/* ==================== 移动端优先适配 ==================== */

@media (max-width: 767px) {
  /* 页面底部留白，防止被 mobile-fixed-bar 遮挡 */
  main {
    padding-bottom: 80px;
  }

  /* 内联双栏布局 → 单列堆叠 */
  .container > div[style*="grid-template-columns"],
  .container > section > div[style*="grid-template-columns"] {
    grid-template-columns: 1fr !important;
  }

  /* majors.html 等页面的 2fr 1fr 布局 → 单列 */
  div[style*="grid-template-columns: 2fr 1fr"] {
    grid-template-columns: 1fr !important;
  }

  /* news.html 左侧栏 250px 1fr → 单列 */
  div[style*="grid-template-columns: 250px 1fr"] {
    grid-template-columns: 1fr !important;
  }

  /* index.html / junior.html / danzhao.html 的 1fr 1fr CTA 区 → 单列 */
  div[style*="grid-template-columns: 1fr 1fr"] {
    grid-template-columns: 1fr !important;
  }

  /* index.html 的 repeat(2, 1fr) → 单列 */
  div[style*="grid-template-columns: repeat(2, 1fr)"] {
    grid-template-columns: 1fr !important;
  }

  /* 表单标题：手机端隐藏，PC端保留 */
  form h3, form .h3 {
    display: none !important;
  }

  /* 表单手机端紧凑布局 */
  form .form-group {
    margin-bottom: 10px;
    gap: 6px;
  }

  form .form-label {
    flex: 0 0 90px;
  }

  form .form-input,
  form .form-select,
  form .form-textarea {
    width: 100%;
  }

  /* majors.html 右侧 sticky 报名表单在移动端隐藏 */
  .card[style*="position: sticky"] {
    display: none !important;
  }

  /* 首页 hero 区导航卡片：2x2 网格 */
  .hero .grid-4 {
    grid-template-columns: 1fr 1fr !important;
    gap: var(--spacing-sm) !important;
  }

  .hero .grid-4 .card {
    padding: var(--spacing-sm) !important;
    text-align: center;
  }

  .hero .grid-4 .h3 {
    font-size: 16px !important;
    margin-top: 4px;
    margin-bottom: 4px;
  }

  .hero .grid-4 .card > span[style*="font-size: 40px"] {
    font-size: 28px !important;
    margin-bottom: 6px !important;
  }

  .hero .grid-4 .card > p {
    font-size: 12px !important;
    line-height: 1.3 !important;
  }

  /* 学校核心数据：2x2 紧凑网格 */
  .stats-grid {
    grid-template-columns: 1fr 1fr !important;
    gap: var(--spacing-sm) !important;
  }

  .stats-grid .stat-card {
    padding: var(--spacing-sm) !important;
  }

  .stats-grid .stat-number {
    font-size: 28px !important;
  }

  .stats-grid .stat-label {
    font-size: 12px !important;
  }

  /* news.html 左侧分类栏隐藏（已在 DOM 中，用 hide-mobile 控制） */
  aside {
    display: none;
  }

  /* 合作企业 logo wall 移动端简化 */
  .logo-wall {
    gap: var(--spacing-sm) !important;
  }

  .logo-wall img {
    width: 60px !important;
    height: 60px !important;
  }

  /* 新闻文章卡片：图片+文字横向 → 纵向堆叠 */
  article.card > div[style*="display: flex"],
  article.card > div[style*="gap:"] {
    flex-direction: column !important;
  }

  article.card img[style*="width: 200px"],
  article.card div[style*="width: 200px"] {
    width: 100% !important;
    height: 180px !important;
  }

  /* 底部 CTA 按钮横向排列 → 纵向 */
  .btn[style*="margin-right"] {
    margin-right: 0 !important;
    margin-bottom: var(--spacing-sm);
    width: 100%;
  }

  /* tab-nav 多按钮自适应 */
  .tab-nav {
    flex-wrap: wrap;
    justify-content: center;
  }

  .tab-btn {
    font-size: 13px;
    padding: 8px 12px;
  }

  /* FAQ 手风琴移动端优化 */
  .faq-cat-title {
    font-size: 16px;
    margin: var(--spacing-md) 0 var(--spacing-sm);
  }
  .faq-question {
    font-size: 15px !important;
    padding: 12px 36px 12px 12px !important;
  }
  .faq-answer {
    padding: 0 12px 12px !important;
    font-size: 14px;
  }
  .faq-cat-btn {
    font-size: 13px;
    padding: 6px 14px;
  }

  /* 报名表单在 register.html 底部留白 */
  form[data-validate] {
    margin-bottom: 20px;
  }

  /* 浮动栏在移动端隐藏（已由 CSS 处理，此处确认） */
  .floating-bar {
    display: none !important;
  }

  /* 底部固定栏 */
  .mobile-fixed-bar {
    padding: 12px 16px !important;
  }

  /* 专业卡片移动端紧凑排版 */
  .program-card .program-title {
    font-size: 18px !important;
  }

  .program-card .program-image {
    height: 120px !important;
  }

  .program-card .program-desc {
    font-size: 13px !important;
  }

  .program-card .program-meta li {
    font-size: 13px !important;
  }
}

/* 平板端适配 (768px - 1023px) */
@media (min-width: 768px) and (max-width: 1023px) {
  /* 平板上 news 侧栏缩窄 */
  div[style*="grid-template-columns: 250px 1fr"] {
    grid-template-columns: 200px 1fr !important;
  }
}