/* =====================================================
   美迪时代教育官网 - 全局样式
   主色：科技蓝 #0066FF / 教育红 #E60012
   辅助色：深蓝 #0A1F44 / 浅灰背景 #F5F7FA
   ===================================================== */

/* CSS 变量 */
:root {
  --primary-blue: #0066FF;
  --deep-blue: #0A1F44;
  --accent-red: #E60012;
  --light-red: #FF4D5A;
  --bg-light: #F5F7FA;
  --bg-white: #FFFFFF;
  --text-dark: #1A1A2E;
  --text-gray: #5A6478;
  --text-light: #8892A0;
  --border-color: #E8ECF2;
  --shadow-sm: 0 2px 8px rgba(10, 31, 68, 0.06);
  --shadow-md: 0 8px 24px rgba(10, 31, 68, 0.1);
  --shadow-lg: 0 16px 48px rgba(10, 31, 68, 0.14);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text-dark);
  background: var(--bg-white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  outline: none;
  background: none;
}

/* 工具类 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 48px;
}

.section-title h2 {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--deep-blue);
  margin-bottom: 12px;
  position: relative;
  display: inline-block;
}

.section-title h2::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 48px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-blue), var(--accent-red));
  border-radius: 2px;
}

.section-title p {
  font-size: 1.05rem;
  color: var(--text-gray);
  margin-top: 24px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  transition: var(--transition);
  gap: 8px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-blue), #3385FF);
  color: #fff;
  box-shadow: 0 4px 16px rgba(0, 102, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 102, 255, 0.4);
}

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

.btn-outline:hover {
  background: var(--primary-blue);
  color: #fff;
}

.btn-red {
  background: linear-gradient(135deg, var(--accent-red), var(--light-red));
  color: #fff;
  box-shadow: 0 4px 16px rgba(230, 0, 18, 0.3);
}

.btn-red:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(230, 0, 18, 0.4);
}

.tag {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(0, 102, 255, 0.1);
  color: var(--primary-blue);
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
}

/* 顶部导航 */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}

.header.scrolled {
  border-bottom-color: var(--border-color);
  box-shadow: var(--shadow-sm);
}

.header .container {
  max-width: 1280px;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--deep-blue);
  flex-shrink: 0;
}

.logo-img {
  height: 44px;
  width: auto;
  max-width: 200px;
  display: block;
  object-fit: contain;
  transition: var(--transition);
}

.logo:hover .logo-img {
  transform: scale(1.02);
}

.logo-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--primary-blue), var(--accent-red));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
  letter-spacing: 1px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav a {
  padding: 8px 12px;
  font-size: 0.95rem;
  color: var(--deep-blue);
  border-radius: var(--radius-sm);
  position: relative;
  font-weight: 600;
  letter-spacing: 0.3px;
  white-space: nowrap;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav a:hover {
  color: var(--primary-blue);
  background: rgba(0, 102, 255, 0.08);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0, 102, 255, 0.12);
}

.nav a.active {
  color: var(--primary-blue);
  background: rgba(0, 102, 255, 0.08);
  font-weight: 700;
}

.nav a.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 12px;
  right: 12px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-blue), #3385FF);
  border-radius: 2px;
  box-shadow: 0 2px 6px rgba(0, 102, 255, 0.35);
}

.header-cta {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.header-phone {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  white-space: nowrap;
  flex-shrink: 0;
}

.phone-top {
  display: flex;
  align-items: center;
  gap: 6px;
  line-height: 1;
}

.header-phone-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.header-phone-icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

.phone-number {
  color: var(--accent-red);
  font-size: 1.24rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  line-height: 1;
}

.phone-time {
  font-size: 0.75rem;
  color: #5a6478;
  font-weight: 400;
  line-height: 1;
  margin-top: 4px;
  letter-spacing: -0.1px;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--deep-blue);
  transition: var(--transition);
}

/* Banner 区域 */
.hero {
  position: relative;
  min-height: 720px;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--deep-blue) 0%, #0D2B5E 50%, #143D7A 100%);
  overflow: hidden;
  padding-top: 76px;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.hero-shape {
  position: absolute;
  right: -10%;
  top: 50%;
  transform: translateY(-50%);
  width: 680px;
  height: 680px;
  background: radial-gradient(circle, rgba(0, 102, 255, 0.25) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 640px;
  color: #fff;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50px;
  font-size: 0.9rem;
  margin-bottom: 24px;
  backdrop-filter: blur(4px);
}

.hero-tag span {
  width: 8px;
  height: 8px;
  background: var(--accent-red);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero h1 {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, #4DA3FF, #FF6B7A);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 32px;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
}

.hero-stat {
  text-align: left;
}

.hero-stat .number {
  font-size: 2.2rem;
  font-weight: 800;
  color: #fff;
  line-height: 1;
}

.hero-stat .number em {
  color: var(--accent-red);
  font-style: normal;
}

.hero-stat .label {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.65);
  margin-top: 6px;
}

/* 首页 - 课程卡片 */
.courses-preview {
  background: var(--bg-light);
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.course-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

.course-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.course-image {
  height: 180px;
  background: linear-gradient(135deg, var(--primary-blue), #5B9AFF);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 3rem;
  position: relative;
  overflow: hidden;
}

.course-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.2) 100%);
}

.course-card:nth-child(2) .course-image { background: linear-gradient(135deg, #7B2FF7, #B07CFF); }
.course-card:nth-child(3) .course-image { background: linear-gradient(135deg, #00B4D8, #48CAE4); }
.course-card:nth-child(4) .course-image { background: linear-gradient(135deg, #F77F00, #FCBF49); }
.course-card:nth-child(5) .course-image { background: linear-gradient(135deg, #D00000, #FF4D6D); }
.course-card:nth-child(6) .course-image { background: linear-gradient(135deg, #006D77, #83C5BE); }

.course-info {
  padding: 24px;
}

.course-info h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--deep-blue);
  margin-bottom: 10px;
}

.course-info p {
  font-size: 0.9rem;
  color: var(--text-gray);
  margin-bottom: 16px;
  line-height: 1.6;
}

.course-meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.course-meta span {
  font-size: 0.8rem;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 4px;
}

/* 首页 - 优势 */
.advantages {
  background: #fff;
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.advantage-card {
  padding: 32px 24px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  text-align: center;
}

.advantage-card:hover {
  border-color: var(--primary-blue);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.advantage-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(0, 102, 255, 0.1), rgba(230, 0, 18, 0.05));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: var(--primary-blue);
}

.advantage-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--deep-blue);
}

.advantage-card p {
  font-size: 0.9rem;
  color: var(--text-gray);
  line-height: 1.6;
}

/* 首页 - 关于我们 */
.about-preview {
  background: linear-gradient(180deg, var(--bg-light) 0%, #fff 100%);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-image {
  position: relative;
}

.about-image-main {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: linear-gradient(135deg, var(--primary-blue), var(--deep-blue));
  min-height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  padding: 40px;
}

.about-image-main.logo-meaning-card {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  padding: 48px;
}

.brand-meaning-logo {
  max-width: 280px;
  width: 75%;
  height: auto;
  object-fit: contain;
  filter: drop-shadow(0 10px 24px rgba(10, 31, 68, 0.08));
  transition: var(--transition);
}

.logo-meaning-card:hover .brand-meaning-logo {
  transform: scale(1.05);
}

.about-image-main.photo-card {
  padding: 0;
  background: transparent;
  min-height: auto;
  box-shadow: none;
  overflow: visible;
  display: block;
  position: relative;
}

.teacher-team-img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.photo-card:hover .teacher-team-img {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(10, 31, 68, 0.16);
}

/* 品牌视频播放器卡片 */
.about-video-card {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  min-height: 380px;
  background: #09152b;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 45px rgba(10, 31, 68, 0.18), 0 4px 12px rgba(10, 31, 68, 0.08);
  border: 1px solid rgba(226, 232, 240, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.about-video-card:hover {
  box-shadow: 0 24px 50px rgba(10, 31, 68, 0.22), 0 6px 16px rgba(10, 31, 68, 0.1);
}

.about-video-card video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  background-color: #09152b;
  border-radius: var(--radius-lg);
}

/* 顶部信息悬浮条 */
.video-header-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  padding: 16px 20px 36px;
  background: linear-gradient(180deg, rgba(7, 18, 38, 0.88) 0%, rgba(7, 18, 38, 0.45) 60%, rgba(7, 18, 38, 0) 100%);
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 12px;
  pointer-events: none;
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.video-header-overlay.hidden {
  opacity: 0;
  transform: translateY(-8px);
}

.video-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(229, 57, 53, 0.95);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 20px;
  letter-spacing: 0.5px;
  box-shadow: 0 2px 8px rgba(229, 57, 53, 0.4);
  flex-shrink: 0;
}

.video-tag .play-dot {
  width: 6px;
  height: 6px;
  background: #ffffff;
  border-radius: 50%;
  display: inline-block;
  animation: blinkDot 1.5s infinite;
}

@keyframes blinkDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

.video-title {
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.6);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 播放按钮大遮罩 */
.video-play-overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(180deg, rgba(8, 20, 44, 0.35) 0%, rgba(8, 20, 44, 0.65) 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  border: none;
  cursor: pointer;
  padding: 24px;
  text-decoration: none;
  color: inherit;
  font-family: inherit;
  transition: opacity 0.35s ease, visibility 0.35s ease, background 0.3s ease;
}

.video-play-overlay:hover {
  background: linear-gradient(180deg, rgba(8, 20, 44, 0.25) 0%, rgba(8, 20, 44, 0.55) 100%);
}

.video-play-overlay:focus-visible {
  outline: 2px solid var(--primary-blue);
  outline-offset: -2px;
}

.video-play-overlay.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.play-btn-circle {
  position: relative;
  width: 76px;
  height: 76px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-blue), #1e50d8);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 28px rgba(26, 92, 255, 0.45);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.3s ease;
}

.play-btn-circle .play-icon {
  margin-left: 4px;
  transition: transform 0.3s ease;
}

.video-play-overlay:hover .play-btn-circle {
  transform: scale(1.1);
  box-shadow: 0 14px 34px rgba(26, 92, 255, 0.6);
}

.video-play-overlay:hover .play-btn-circle .play-icon {
  transform: scale(1.08);
}

/* 呼吸光环动画 */
.play-pulse {
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  border: 2px solid rgba(26, 92, 255, 0.65);
  animation: playPulse 2.2s infinite cubic-bezier(0.25, 0.1, 0.25, 1);
  pointer-events: none;
}

@keyframes playPulse {
  0% {
    transform: scale(0.92);
    opacity: 0.85;
  }
  50% {
    transform: scale(1.22);
    opacity: 0.25;
  }
  100% {
    transform: scale(1.38);
    opacity: 0;
  }
}

.play-text-group {
  text-align: center;
  user-select: none;
}

.play-main-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: 0.5px;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.7);
  margin-bottom: 4px;
}

.play-sub-text {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.9);
  letter-spacing: 0.3px;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.7);
}

.about-badge {
  position: absolute;
  bottom: -24px;
  right: -24px;
  background: #fff;
  padding: 24px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  text-align: center;
  min-width: 160px;
  z-index: 4;
}

.about-badge .num {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--accent-red);
  line-height: 1;
}

.about-badge .text {
  font-size: 0.9rem;
  color: var(--text-gray);
  margin-top: 6px;
}

.about-content h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--deep-blue);
  margin-bottom: 20px;
}

.about-content p {
  color: var(--text-gray);
  margin-bottom: 16px;
  font-size: 0.98rem;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 28px 0;
}

.about-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--text-dark);
}

.about-features li::before {
  content: "✓";
  width: 22px;
  height: 22px;
  background: rgba(0, 102, 255, 0.1);
  color: var(--primary-blue);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  flex-shrink: 0;
}

/* 校区展示 */
.campuses {
  background: var(--bg-white);
}

.campus-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 16px;
}

.campus-item {
  padding: 24px 16px;
  background: var(--bg-light);
  border-radius: var(--radius-md);
  text-align: center;
  transition: var(--transition);
  border: 1px solid transparent;
}

.campus-item:hover {
  background: #fff;
  border-color: var(--primary-blue);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.campus-item i {
  font-size: 1.8rem;
  color: var(--primary-blue);
  margin-bottom: 10px;
  display: block;
}

.campus-item span {
  font-size: 1rem;
  font-weight: 600;
  color: var(--deep-blue);
}

/* CTA 区域 */
.cta-section {
  background: linear-gradient(135deg, var(--primary-blue), var(--deep-blue));
  color: #fff;
  text-align: center;
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%23ffffff' fill-opacity='0.05' fill-rule='evenodd'/%3E%3C/svg%3E");
  opacity: 0.4;
}

.cta-section .container {
  position: relative;
  z-index: 2;
}

.cta-section h2 {
  font-size: 2.4rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-section p {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 32px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

/* 内页 Banner */
.page-banner {
  padding: 160px 0 80px;
  background: linear-gradient(135deg, var(--deep-blue), var(--primary-blue));
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.page-banner .container {
  position: relative;
  z-index: 2;
}

.page-banner h1 {
  font-size: 2.6rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.page-banner p {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.8);
}

.breadcrumb {
  margin-top: 20px;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
}

.breadcrumb a:hover {
  color: #fff;
}

/* 品牌介绍页 */
.brand-story {
  background: #fff;
}

.story-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.story-card {
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 24px;
}

.story-card h3 {
  font-size: 1.25rem;
  color: var(--deep-blue);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.story-card h3 .icon {
  width: 36px;
  height: 36px;
  background: var(--primary-blue);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.story-card p {
  color: var(--text-gray);
  font-size: 0.95rem;
  line-height: 1.8;
}

.brand-values {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.value-item {
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  transition: var(--transition);
}

.value-item:hover {
  border-color: var(--accent-red);
  box-shadow: var(--shadow-sm);
}

.value-item h4 {
  color: var(--accent-red);
  font-size: 1rem;
  margin-bottom: 8px;
}

.value-item p {
  font-size: 0.85rem;
  color: var(--text-gray);
}

/* 培训课程页 */
.course-detail-section {
  background: var(--bg-light);
}

.course-filter {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 10px 24px;
  border-radius: 50px;
  background: #fff;
  color: var(--text-gray);
  border: 1px solid var(--border-color);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--primary-blue);
  color: #fff;
  border-color: var(--primary-blue);
}

.course-detail-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

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

.course-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.course-header h3 {
  font-size: 1.4rem;
  color: var(--deep-blue);
  margin-bottom: 8px;
}

.course-header .subtitle {
  color: var(--text-gray);
  font-size: 0.95rem;
}

.course-price {
  text-align: right;
}

.course-price .price {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent-red);
}

.course-price .period {
  font-size: 0.85rem;
  color: var(--text-light);
}

.course-modules {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin: 20px 0;
}

.course-modules li {
  padding: 12px 16px;
  background: var(--bg-light);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--text-dark);
  display: flex;
  align-items: center;
  gap: 8px;
}

.course-modules li::before {
  content: "▸";
  color: var(--primary-blue);
  font-weight: bold;
}

.course-tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.course-tags span {
  padding: 6px 14px;
  background: rgba(0, 102, 255, 0.08);
  color: var(--primary-blue);
  border-radius: 20px;
  font-size: 0.8rem;
}

/* 产教融合页 */
.industry-partners {
  background: #fff;
}

.partner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.partner-card {
  padding: 32px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.partner-card:hover {
  border-color: var(--primary-blue);
  box-shadow: var(--shadow-md);
}

.partner-card .icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary-blue), #5B9AFF);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.partner-card h3 {
  font-size: 1.2rem;
  color: var(--deep-blue);
  margin-bottom: 12px;
}

.partner-card p {
  color: var(--text-gray);
  font-size: 0.95rem;
  line-height: 1.7;
}

.cooperation-flow {
  background: var(--bg-light);
}

.flow-list {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.flow-item {
  flex: 1;
  min-width: 200px;
  text-align: center;
  position: relative;
}

.flow-item:not(:last-child)::after {
  content: "→";
  position: absolute;
  right: -20px;
  top: 30px;
  font-size: 1.5rem;
  color: var(--primary-blue);
}

.flow-num {
  width: 64px;
  height: 64px;
  background: var(--primary-blue);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto 16px;
}

.flow-item h4 {
  color: var(--deep-blue);
  margin-bottom: 8px;
}

.flow-item p {
  font-size: 0.9rem;
  color: var(--text-gray);
}

/* 师资团队页 */
.teachers-section {
  background: var(--bg-light);
}

.teacher-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}

.teacher-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  text-align: center;
}

.teacher-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.teacher-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--bg-light), #E8ECF2);
  margin: 32px auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  color: var(--primary-blue);
  border: 4px solid #fff;
  box-shadow: var(--shadow-sm);
}

.teacher-info h3 {
  font-size: 1.2rem;
  color: var(--deep-blue);
  margin-bottom: 4px;
}

.teacher-info .title {
  color: var(--primary-blue);
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.teacher-info p {
  font-size: 0.85rem;
  color: var(--text-gray);
  padding: 0 24px 24px;
  line-height: 1.6;
}

/* 学员风采页 */
.student-showcase {
  background: #fff;
}

.sub-nav {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.sub-nav a {
  padding: 10px 24px;
  background: var(--bg-light);
  border-radius: 50px;
  color: var(--text-gray);
  font-weight: 500;
  transition: var(--transition);
}

.sub-nav a:hover,
.sub-nav a.active {
  background: var(--primary-blue);
  color: #fff;
}

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.showcase-card {
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}

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

.showcase-image {
  height: 200px;
  background: linear-gradient(135deg, var(--primary-blue), #5B9AFF);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 3rem;
}

.showcase-card:nth-child(2) .showcase-image { background: linear-gradient(135deg, #7B2FF7, #B07CFF); }
.showcase-card:nth-child(3) .showcase-image { background: linear-gradient(135deg, #00B4D8, #48CAE4); }
.showcase-card:nth-child(4) .showcase-image { background: linear-gradient(135deg, #F77F00, #FCBF49); }
.showcase-card:nth-child(5) .showcase-image { background: linear-gradient(135deg, #D00000, #FF4D6D); }
.showcase-card:nth-child(6) .showcase-image { background: linear-gradient(135deg, #006D77, #83C5BE); }

.showcase-content {
  padding: 24px;
}

.showcase-content h3 {
  font-size: 1.1rem;
  color: var(--deep-blue);
  margin-bottom: 8px;
}

.showcase-content p {
  font-size: 0.9rem;
  color: var(--text-gray);
  line-height: 1.6;
}

/* 美迪问答页 */
.faq-section {
  background: var(--bg-light);
}

.faq-list {
  max-width: 880px;
  margin: 0 auto;
}

.faq-item {
  background: #fff;
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1rem;
  font-weight: 600;
  color: var(--deep-blue);
  text-align: left;
}

.faq-question .icon {
  width: 28px;
  height: 28px;
  background: var(--bg-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-blue);
  font-size: 1rem;
  transition: var(--transition);
  flex-shrink: 0;
  margin-left: 12px;
}

.faq-item.active .faq-question .icon {
  transform: rotate(45deg);
  background: var(--primary-blue);
  color: #fff;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  color: var(--text-gray);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* 机构动态/商业资讯页 */
.news-section {
  background: #fff;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}

.news-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

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

.news-image {
  height: 200px;
  background: linear-gradient(135deg, var(--deep-blue), var(--primary-blue));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 2.5rem;
}

.news-content {
  padding: 24px;
}

.news-date {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-bottom: 8px;
}

.news-content h3 {
  font-size: 1.15rem;
  color: var(--deep-blue);
  margin-bottom: 12px;
  line-height: 1.4;
}

.news-content p {
  font-size: 0.9rem;
  color: var(--text-gray);
  line-height: 1.6;
  margin-bottom: 16px;
}

.read-more {
  color: var(--primary-blue);
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.read-more:hover {
  color: var(--accent-red);
}

/* 联系我们页 */
.contact-section {
  background: var(--bg-light);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-info-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
}

.contact-info-card h2 {
  font-size: 1.6rem;
  color: var(--deep-blue);
  margin-bottom: 12px;
}

.contact-info-card > p {
  color: var(--text-gray);
  margin-bottom: 32px;
}

.contact-item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}

.contact-item .icon {
  width: 48px;
  height: 48px;
  background: rgba(0, 102, 255, 0.1);
  color: var(--primary-blue);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-item h4 {
  color: var(--deep-blue);
  margin-bottom: 4px;
}

.contact-item p {
  color: var(--text-gray);
  font-size: 0.95rem;
}

.contact-form {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
}

/* 微信扫码咨询卡片 */
.contact-wechat-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.wechat-card-header {
  margin-bottom: 20px;
}

.wechat-badge {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(7, 193, 96, 0.1);
  color: #07C160;
  font-weight: 700;
  font-size: 0.82rem;
  border-radius: 20px;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}

.wechat-card-header h2 {
  font-size: 1.6rem;
  color: var(--deep-blue);
  margin-bottom: 8px;
  font-weight: 700;
}

.wechat-card-header p {
  color: var(--text-gray);
  font-size: 0.95rem;
}

.wechat-qr-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  margin: 8px 0 20px;
}

.qr-img-box {
  width: 230px;
  height: 230px;
  padding: 10px;
  background: #FFFFFF;
  border-radius: var(--radius-md);
  border: 2px solid #E2E8F0;
  box-shadow: 0 8px 24px rgba(10, 31, 68, 0.08);
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.qr-img-box:hover {
  border-color: #07C160;
  box-shadow: 0 12px 30px rgba(7, 193, 96, 0.2);
  transform: translateY(-2px);
}

.wechat-qr-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.qr-scan-tips {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
  max-width: 330px;
  text-align: left;
}

/* 手机号/微信直通操作卡片 */
.wechat-phone-action {
  width: 100%;
  max-width: 330px;
  background: linear-gradient(135deg, #F0FDF4 0%, #DCFCE7 100%);
  border: 1.5px solid rgba(7, 193, 96, 0.4);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  text-align: center;
  box-shadow: 0 4px 14px rgba(7, 193, 96, 0.12);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.wechat-phone-action:hover {
  transform: translateY(-2px);
  border-color: #07C160;
  box-shadow: 0 6px 20px rgba(7, 193, 96, 0.22);
}

.phone-action-label {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  color: #15803D;
  margin-bottom: 8px;
}

.phone-action-label .pulse-dot {
  width: 7px;
  height: 7px;
  background: #16A34A;
  border-radius: 50%;
  display: inline-block;
  animation: blinkDot 1.5s infinite;
}

.phone-action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  background: #07C160;
  color: #FFFFFF !important;
  padding: 9px 14px;
  border-radius: var(--radius-sm);
  font-size: 1.18rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(7, 193, 96, 0.35);
  transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.phone-action-btn:hover {
  background: #06AD56;
  transform: scale(1.02);
  box-shadow: 0 6px 16px rgba(7, 193, 96, 0.45);
}

.phone-action-btn .action-icon {
  font-size: 1.15rem;
}

.phone-action-btn .action-num {
  font-family: inherit;
}

.phone-action-btn .action-tag {
  font-size: 0.72rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.25);
  padding: 2px 8px;
  border-radius: 12px;
  margin-left: 2px;
  white-space: nowrap;
}

.scan-tip-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--deep-blue);
  background: var(--bg-light);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(0, 0, 0, 0.03);
}

.scan-tip-item .tip-icon {
  font-size: 1.1rem;
}

.scan-tip-item strong {
  color: #07C160;
  letter-spacing: 0.3px;
}

.wechat-card-footer {
  padding-top: 18px;
  border-top: 1px solid var(--border-color);
  font-size: 0.9rem;
  color: var(--text-gray);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-phone-item {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.wechat-card-footer .phone-link {
  color: var(--accent-red);
  font-weight: 700;
  font-size: 1.05rem;
  margin-left: 4px;
}

.wechat-card-footer .phone-link.mobile-link {
  color: #07C160;
  font-weight: 700;
  font-size: 1.08rem;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  color: var(--deep-blue);
  font-weight: 500;
  font-size: 0.95rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--text-dark);
  transition: var(--transition);
  font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.map-placeholder {
  margin-top: 48px;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.map-placeholder h3 {
  color: var(--deep-blue);
  margin-bottom: 16px;
}

.campus-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 24px;
  text-align: left;
}

.campus-list li {
  padding: 16px;
  background: var(--bg-light);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--text-dark);
}

/* 底部 */
.footer {
  background: var(--deep-blue);
  color: #fff;
  padding: 64px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .logo {
  color: #fff;
  margin-bottom: 16px;
  display: inline-flex;
}

.footer-brand .logo-img {
  background: #ffffff;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  height: 46px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 20px;
}

.footer-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: #fff;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: #fff;
  padding-left: 4px;
}

.footer-contact p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
}

/* 回到顶部 */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 48px;
  height: 48px;
  background: var(--primary-blue);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--accent-red);
  transform: translateY(-4px);
}

/* 响应式 */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .about-grid,
  .story-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .about-image {
    order: -1;
  }

  .about-video-card {
    min-height: 320px;
  }
}

@media (max-width: 768px) {
  .nav {
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 20px;
    gap: 4px;
    box-shadow: var(--shadow-md);
    transform: translateY(-150%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    max-height: calc(100vh - 76px);
    overflow-y: auto;
  }

  .nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav a {
    width: 100%;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
  }

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

  .logo-img {
    height: 38px;
  }

  .header-phone {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 120px 0 80px;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero-desc {
    font-size: 1rem;
  }

  .hero-stats {
    gap: 24px;
  }

  .section {
    padding: 60px 0;
  }

  .section-title h2 {
    font-size: 1.7rem;
  }

  .page-banner {
    padding: 120px 0 60px;
  }

  .page-banner h1 {
    font-size: 2rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .flow-item:not(:last-child)::after {
    display: none;
  }

  .course-header {
    flex-direction: column;
  }

  .course-price {
    text-align: left;
  }

  .about-features {
    grid-template-columns: 1fr;
  }

  .about-video-card {
    min-height: 240px;
    border-radius: var(--radius-md);
  }

  .about-badge {
    bottom: -16px;
    right: 12px;
    padding: 14px 18px;
    min-width: 130px;
  }

  .about-badge .num {
    font-size: 1.8rem;
  }

  .about-badge .text {
    font-size: 0.78rem;
  }

  .video-title {
    font-size: 0.82rem;
  }

  .play-btn-circle {
    width: 62px;
    height: 62px;
  }

  .play-main-text {
    font-size: 1.05rem;
  }

  .play-sub-text {
    font-size: 0.78rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .section-title h2 {
    font-size: 1.5rem;
  }

  .contact-info-card,
  .contact-form {
    padding: 24px;
  }

  .about-video-card {
    min-height: 200px;
  }

  .video-header-overlay {
    padding: 10px 14px 24px;
  }

  .video-tag {
    font-size: 0.7rem;
    padding: 2px 8px;
  }

  .video-title {
    font-size: 0.75rem;
  }
}

/* =====================================================
   SEO/GEO 新增栏目样式（知识百科 / 指南文章 / 报名 / 404）
   ===================================================== */

/* 头部免费报名按钮 */
.header-enroll {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  background: var(--accent-red);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: var(--transition);
}

.header-enroll:hover {
  background: var(--light-red);
  color: #fff;
  transform: translateY(-1px);
}

/* 知识百科分类标签 */
.knowledge-categories {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 24px;
}

.knowledge-cat {
  padding: 8px 20px;
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: 999px;
  font-size: 0.9rem;
  color: var(--text-gray);
  transition: var(--transition);
}

.knowledge-cat:hover,
.knowledge-cat.active {
  background: var(--primary-blue);
  border-color: var(--primary-blue);
  color: #fff;
}

/* 指南文章正文 */
.article-body {
  max-width: 860px;
  margin: 0 auto;
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: 48px 56px;
  line-height: 1.9;
  color: var(--text-dark);
  font-size: 1rem;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  padding-bottom: 20px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-light);
  font-size: 0.88rem;
}

.article-meta .tag {
  margin: 0;
}

.article-body h2 {
  font-size: 1.45rem;
  margin: 40px 0 16px;
  padding-left: 14px;
  border-left: 4px solid var(--primary-blue);
  line-height: 1.4;
}

.article-body h3 {
  font-size: 1.15rem;
  margin: 28px 0 12px;
  color: var(--deep-blue);
}

.article-body p {
  margin-bottom: 16px;
  color: var(--text-gray);
}

.article-body ul,
.article-body ol {
  margin: 0 0 20px 22px;
  color: var(--text-gray);
}

.article-body li {
  margin-bottom: 8px;
}

.article-body strong {
  color: var(--deep-blue);
}

.article-body blockquote {
  margin: 24px 0;
  padding: 16px 22px;
  background: #F0F6FF;
  border-left: 4px solid var(--primary-blue);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--deep-blue);
  font-size: 0.98rem;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0 28px;
  font-size: 0.92rem;
}

.article-body th,
.article-body td {
  padding: 12px 14px;
  border: 1px solid var(--border-color);
  text-align: left;
}

.article-body th {
  background: var(--bg-light);
  color: var(--deep-blue);
  font-weight: 600;
}

.article-body td {
  color: var(--text-gray);
}

.article-cta {
  margin-top: 44px;
  padding: 28px 32px;
  background: linear-gradient(135deg, #0A1F44, #1240A8);
  border-radius: var(--radius-md);
  text-align: center;
  color: #fff;
}

.article-cta h3 {
  color: #fff;
  margin: 0 0 8px;
}

.article-cta p {
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 20px;
}

/* 文章相关推荐 */
.article-related {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

/* 报名页班型选择 */
.enroll-plans {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  align-items: stretch;
}

.enroll-plan {
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.enroll-plan:hover {
  border-color: var(--primary-blue);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.enroll-plan.hot {
  border-color: var(--primary-blue);
  box-shadow: var(--shadow-md);
}

.enroll-plan .plan-badge {
  position: absolute;
  top: -12px;
  right: 20px;
  padding: 4px 14px;
  background: var(--accent-red);
  color: #fff;
  font-size: 0.78rem;
  border-radius: 999px;
  box-shadow: 0 4px 10px rgba(230, 0, 18, 0.25);
  font-weight: 600;
}

.enroll-plan h3 {
  font-size: 1.15rem;
  color: var(--deep-blue);
  margin-bottom: 8px;
}

.enroll-plan .plan-duration {
  color: var(--primary-blue);
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.enroll-plan ul {
  list-style: none;
  margin: 0 0 24px;
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.enroll-plan li {
  padding: 2px 0 2px 20px;
  position: relative;
  color: var(--text-gray);
  font-size: 0.92rem;
  line-height: 1.5;
}

.enroll-plan li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 2px;
  color: var(--primary-blue);
  font-weight: 700;
}

.enroll-plan .btn {
  margin-top: auto;
  width: 100%;
  text-align: center;
}

/* 404 页面 */
.error-section {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 20px;
  background: var(--bg-light);
}

.error-code {
  font-size: 7rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-blue), #1240A8);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}

.error-section h1 {
  font-size: 1.6rem;
  color: var(--deep-blue);
  margin: 16px 0 10px;
}

.error-section p {
  color: var(--text-gray);
  margin-bottom: 28px;
}

/* 响应式补充 */
@media (max-width: 768px) {
  .article-body {
    padding: 28px 20px;
  }

  .article-body h2 {
    font-size: 1.25rem;
  }

  .error-code {
    font-size: 5rem;
  }

  .header-enroll {
    padding: 6px 12px;
    font-size: 0.8rem;
  }
}