/* =========================================
   2026年暑假专题 - 全局样式
   ========================================= */

/* CSS变量定义 */
:root {
  --color-bg: #f0f5ff;
  --color-white: #ffffff;
  --color-primary: #62bdb4;
  --color-blue: #0d62bd;
  --color-text: #333333;
  --color-text-light: #999999;
  --color-border: #dddddd;
  --color-safety-1: rgba(0, 136, 255, 0.3);
  --color-safety-2: rgba(136, 210, 45, 0.3);
  --color-safety-3: rgba(207, 159, 27, 0.3);
  --color-safety-4: rgba(232, 30, 30, 0.3);
  --color-safety-5: rgba(111, 56, 206, 0.3);
  --color-safety-6: rgba(37, 178, 161, 0.3);
  --font-family: "Source Han Sans CN", "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
  --container-width: 1324px;
  --container-padding: 16px;
  --transition-default: all 0.3s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
  min-width: 320px;
}

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

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

/* =========================================
   页面背景装饰层
   ========================================= */
.bg-decoration {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.bg-img {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 1920px;
  max-width: 100%;
  background-repeat: no-repeat;
  background-position: center top;
  background-size: contain;
  opacity: 0.3;
}

.bg-img-1 {
  top: 856px;
  height: 3508px;
  background-image: url("../images/18.png");
}

.bg-img-2 {
  top: 4364px;
  height: 2128px;
  background-image: url("../images/39.png");
}

.bg-img-3 {
  top: 6492px;
  height: 2583px;
  background-image: url("../images/44.png");
}

.bg-img-4 {
  top: 9075px;
  height: 1844px;
  background-image: url("../images/41.png");
}

.bg-img-5 {
  top: 10919px;
  height: 1629px;
  background-image: url("../images/40.png");
  opacity: 0.1;
}

/* =========================================
   通用容器与布局
   ========================================= */
.container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  position: relative;
  z-index: 1;
}

/* =========================================
   顶部Logo区域
   ========================================= */
.page-header {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 10;
  padding: 37px 0 0;
}

.site-logo {
  width: 252px;
  height: 82px;
  object-fit: contain;
}

/* =========================================
   首屏Banner
   ========================================= */
.hero-banner {
  width: 100%;
  position: relative;
}

.hero-img {
  width: 100%;
  height: auto;
  object-fit: cover;
  object-position: center top;
}

/* =========================================
   通用按钮样式
   ========================================= */
.btn-wrap {
  display: flex;
  justify-content: center;
  margin-top: 40px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-family: var(--font-family);
  font-weight: 400;
  border-radius: 999px;
  cursor: pointer;
  transition: var(--transition-default);
}

.btn-outline {
  background: var(--color-white);
  border: 1px solid;
}

.btn-teal {
  width: 240px;
  height: 43px;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-teal:hover,
.btn-teal:active {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(98, 189, 180, 0.3);
}

.btn-blue {
  width: 240px;
  height: 70px;
  color: var(--color-text);
  border-color: var(--color-blue);
  font-size: 20px;
}

.btn-blue:hover,
.btn-blue:active {
  background: var(--color-blue);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(13, 98, 189, 0.3);
}

/* =========================================
   区块标题栏
   ========================================= */
.section-title-bar {
  display: flex;
  align-items: center;
  gap: 23px;
  margin-bottom: 32px;
}

.title-icon {
  display: inline-block;
  width: 10px;
  height: 50px;

  background: rgba(250, 168, 16, 1);
  flex-shrink: 0;
}

.section-title {
  font-size: 36px;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.2;
}

/* =========================================
   会议部署区域
   ========================================= */
.meeting-section {
  padding-top: 60px;
  background-image: url("../images/bg_1.png");
  background-size: 100% 100%;
}

.meeting-card {
  background: var(--color-white);
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
}

.meeting-highlight {
  display: flex;
  gap: 25px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 24px;
}

.meeting-img {
  width: 389px;
  height: 219px;
  border-radius: 10px;
  object-fit: cover;
  flex-shrink: 0;
}

.meeting-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 219px;
}

.meeting-title {
  font-size: 36px;
  font-weight: 400;
  color: var(--color-text);
  line-height: 1.4;
}

.meeting-summary {
  font-size: 20px;
  color: var(--color-text-light);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.meeting-info .btn-small {
  align-self: flex-start;
  width: 240px;
  height: 43px;
  font-size: 20px;
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-white);
  margin-top: 4px;
}

.meeting-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 20px;
  color: var(--color-text-light);
}

.meeting-link {
  color: var(--color-text-light);
  transition: var(--transition-default);
}

.meeting-link:hover {
  color: var(--color-blue);
}

.meeting-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.meeting-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 24px;
  padding: 6px 0;
  gap: 80px;
}

.item-title {
  color: var(--color-text);
  font-weight: 400;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.item-date {
  color: var(--color-text-light);
  font-size: 20px;
  flex-shrink: 0;
}

/* =========================================
   Section标题装饰图片
   ========================================= */
.section-title-img {
  display: block;
  margin: 0 auto;
  padding: 40px 0 48px;
  max-width: 100%;
  height: auto;
  object-fit: contain;
}

/* =========================================
   心理健康科普区域
   ========================================= */
.bg_2 {
  background-image: url("../images/bg_2.png");
  background-size: 100% 100%;
}
.bg_3 {
  background-image: url("../images/bg_3.png");
  background-size: 100% 100%;
}
.tips-section {
  padding-top: 80px;
  padding-bottom: 60px;
}

.tips-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 44px;
}

.tip-card {
  background: var(--color-white);
  border-radius: 20px;
  padding: 30px;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
  transition: var(--transition-default);
}

.tip-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.tip-icon {
  margin-bottom: 20px;
  display: block;
}

.icon-shape {
  display: inline-block;
  width: 48px;
  height: 48px;
  border-radius: 12px;
}

.icon-shape img {
  width: 100%;
}

/* .icon-shape-1 {
  background: linear-gradient(135deg, #ff9a9e, #fecfef);
}
.icon-shape-2 {
  background: linear-gradient(135deg, #a8edea, #fed6e3);
}
.icon-shape-3 {
  background: linear-gradient(135deg, #ffecd2, #fcb69f);
}
.icon-shape-4 {
  background: linear-gradient(135deg, #d299c2, #fef9d7);
} */

.tip-title {
  font-size: 36px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 16px;
  line-height: 1.2;
}

.tip-desc {
  font-size: 24px;
  color: var(--color-text);
  line-height: 1.6;
}

/* =========================================
   心理健康公开课区域
   ========================================= */
.courses-section {
  padding-bottom: 60px;
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.course-card {
  background: var(--color-white);
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: var(--transition-default);
}

.course-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.1);
}

.course-img {
  width: 100%;
  height: 234px;
  object-fit: cover;
  border-radius: 20px 20px 0 0;
}

.course-info {
  padding: 20px 0 24px;
  text-align: center;
}

.course-name {
  font-size: 24px;
  font-weight: 400;
  color: var(--color-text);
  margin-bottom: 12px;
  line-height: 1.4;
  padding: 0 16px;
}

.course-source {
  font-size: 20px;
  color: var(--color-text-light);
}

/* =========================================
   人工智能+教育政策区域
   ========================================= */
.ai-policy-section {
  padding-top: 80px;
  padding-bottom: 60px;
}

.ai-policy-wrap {
  display: flex;
  gap: 40px;
  align-items: flex-start;
}

.ai-policy-img {
  width: 429px;
  height: 643px;
  border-radius: 20px;
  object-fit: cover;
  flex-shrink: 0;
}

.ai-policy-cards {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.policy-card {
  background: var(--color-white);
  border-radius: 20px;
  padding: 28px 40px;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
  transition: var(--transition-default);
}

.policy-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.policy-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.policy-icon {
  display: inline-block;
  width: 48px;
  height: 48px;
  border-radius: 50%;

  flex-shrink: 0;
}

.policy-icon-2 {
}

.policy-title {
  font-size: 36px;
  font-weight: 500;
  color: var(--color-text);
}

.policy-text {
  font-size: 24px;
  color: var(--color-text);
  line-height: 1.6;
  margin-bottom: 16px;
}

.policy-source {
  font-size: 20px;
  color: var(--color-text-light);
}

/* =========================================
   人工智能通识区域
   ========================================= */
.ai-courses-section {
  padding-bottom: 60px;
}

/* =========================================
   阅读推荐区域
   ========================================= */
.reading-section {
  padding-top: 80px;
  padding-bottom: 60px;
  background-image: url("../images/bg_4.png");
  background-size: 100% 100%;
}

.reading-intro {
  display: flex;
  justify-content: flex-start;
  margin-bottom: 32px;
}

.reading-intro-text {
  width: 868px;
  background: rgba(98, 189, 180, 0.5);
  border-radius: 20px;
  padding: 38px 49px;
  color: var(--color-white);
  font-size: 24px;
  line-height: 1.6;
}

.reading-tips-card {
  width: 868px;
  background: var(--color-white);
  border-radius: 20px;
  padding: 23px 20px;
  margin-bottom: 48px;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
}

.reading-tips-inner {
  display: flex;
  flex-direction: column;
  padding-left: 134px;
  position: relative;
}

.tips-icon {
  position: absolute;
  left: 60px;
  top: 2px;
  width: 36px;
  height: 36px;
}
.tips-icon img {
  width: 100%;
}

.reading-tips-title {
  font-size: 36px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 16px;
  line-height: 1.2;
}

.reading-tips-list {
  font-size: 30px;
  color: var(--color-text);
  line-height: 1.6;
}

.reading-tips-list p {
  margin-bottom: 4px;
}

.reading-deco {
  height: 100%;
  object-fit: contain;
  pointer-events: none;
  z-index: 2;
}

/* 书目区域 */
.book-section {
  margin-bottom: 48px;
}

.book-section-title {
  font-size: 36px;
  font-weight: 400;
  color: var(--color-text);
  text-align: center;
  margin-bottom: 40px;
}

.book-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1292px;
  margin: 0 auto;
}

.book-card {
  background: var(--color-white);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
  transition: var(--transition-default);
}

.book-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.1);
}

.book-img {
  width: 100%;
  height: 408px;
  object-fit: cover;
  border-radius: 20px 20px 0 0;
}

.book-info {
  padding: 20px 16px 24px;
  text-align: center;
}

.book-name {
  font-size: 36px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 8px;
  line-height: 1.2;
}

.book-author {
  font-size: 24px;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.book-tag {
  display: inline-block;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 24px;
  padding: 4px 20px;
  border-radius: 20px;
}

/* =========================================
   暑期实践活动区域
   ========================================= */
.practice-section {
  padding-top: 80px;
  padding-bottom: 60px;
  background-image: url("../images/bg_5.png");
  background-size: 100% 100%;
}

.practice-deco-top {
  display: block;
  width: 402px;
  height: 290px;
  margin: 0 auto 40px;
  object-fit: contain;
}

.practice-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 44px;
  max-width: 1288px;
  margin: 0 auto;
}

.practice-card {
  background: var(--color-white);
  border-radius: 20px;
  padding: 44px 20px 40px;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
  transition: var(--transition-default);
}

.practice-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.practice-img {
  width: 100%;
  height: 186px;
  object-fit: cover;
  border-radius: 20px;
  margin-bottom: 24px;
}

.practice-title {
  font-size: 36px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 16px;
  line-height: 1.2;
}

.practice-desc {
  font-size: 24px;
  color: var(--color-text);
  line-height: 1.6;
}

/* =========================================
   安全提示区域
   ========================================= */
.safety-section {
  padding-top: 80px;
  padding-bottom: 60px;
  background-image: url("../images/bg_6.png");
  background-size: 100% 100%;
}

.safety-deco {
  display: block;
  width: 398px;
  height: 303px;
  margin: 0 auto 40px;
  object-fit: contain;
}

.safety-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 1286px;
  margin: 0 auto;
}

.safety-card {
  border-radius: 14.89px;
  padding: 30px;
  transition: var(--transition-default);
}

.safety-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
}

.safety-card-1 {
  background: var(--color-safety-1);
}
.safety-card-2 {
  background: var(--color-safety-2);
}
.safety-card-3 {
  background: var(--color-safety-3);
}
.safety-card-4 {
  background: var(--color-safety-4);
}
.safety-card-5 {
  background: var(--color-safety-5);
}
.safety-card-6 {
  background: var(--color-safety-6);
}

.safety-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.safety-num {
  font-size: 35.73px;
  font-weight: 900;
  color: var(--color-blue);
  font-family: var(--font-family);
}

.safety-icon {
  display: inline-block;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  opacity: 0.8;
}

.safety-icon img {
  width: 100%;
}

.safety-title {
  font-size: 36px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 16px;
  line-height: 1.2;
}

.safety-desc {
  font-size: 24px;
  color: var(--color-text);
  line-height: 1.6;
  text-align: justify;
}

/* =========================================
   底部Footer
   ========================================= */
.page-footer {
  position: relative;
  width: 100%;
  overflow: hidden;
}

.footer-bg {
  width: 100%;
  height: 335px;
  object-fit: cover;
  object-position: center bottom;
}

/* =========================================
   滚动动画类
   ========================================= */
.fade-in {
  opacity: 0;
  transform: translateY(40px);
  transition:
    opacity 0.8s ease-out,
    transform 0.8s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-40px);
  transition:
    opacity 0.8s ease-out,
    transform 0.8s ease-out;
}

.fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(40px);
  transition:
    opacity 0.8s ease-out,
    transform 0.8s ease-out;
}

.fade-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* =========================================
   平板端响应式 (768px - 1024px)
   ========================================= */
@media screen and (min-width: 768px) and (max-width: 1024px) {
  :root {
    --container-padding: 24px;
  }

  .site-logo {
    width: 200px;
    height: 65px;
  }

  .section-title {
    font-size: 30px;
  }

  .meeting-highlight {
    flex-direction: column;
  }

  .meeting-img {
    width: 100%;
    height: auto;
    max-height: 280px;
  }

  .meeting-title {
    font-size: 28px;
  }

  .meeting-summary,
  .meeting-meta,
  .item-date,
  .policy-source {
    font-size: 18px;
  }

  .meeting-item {
    font-size: 20px;
  }

  .tips-grid {
    gap: 24px;
  }

  .tip-title,
  .policy-title,
  .practice-title,
  .safety-title,
  .book-name {
    font-size: 28px;
  }

  .tip-desc,
  .policy-text,
  .practice-desc,
  .safety-desc,
  .reading-intro-text,
  .book-author,
  .book-tag,
  .course-name {
    font-size: 20px;
  }

  .reading-tips-list {
    font-size: 22px;
  }

  .courses-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .book-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .ai-policy-wrap {
    flex-direction: column;
    align-items: center;
  }

  .ai-policy-img {
    width: 100%;
    max-width: 429px;
    height: auto;
  }

  .reading-intro-text,
  .reading-tips-card {
    width: 100%;
  }

  .reading-deco {
    display: none;
  }

  .practice-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .safety-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .deco-img {
    display: none;
  }
}

/* =========================================
   移动端响应式 (320px - 767px)
   ========================================= */
@media screen and (max-width: 767px) {
  .meeting-item {
    display: block;
  }

  .item-title {
    display: block;
  }
  .ai-policy-img {
    display: none;
  }
  .section-title-img {
    width: 148px;
    padding: 20px 0 20px;
  }
  :root {
    --container-padding: 16px;
  }

  body {
    font-size: 14px;
  }

  .site-logo {
    width: 96px;
    height: 52px;
  }

  .page-header {
    padding: 16px 0 0;
  }

  .section-title-bar {
    gap: 12px;
    margin-bottom: 24px;
  }

  .title-icon {
    width: 12px;
    height: 12px;
  }

  .section-title {
    font-size: 22px;
  }

  .btn-blue {
    width: 200px;
    height: 56px;
    font-size: 18px;
  }

  .btn-teal {
    width: 200px;
    height: 40px;
    font-size: 18px;
  }

  .meeting-info .btn-small {
    width: 160px;
    height: 36px;
    font-size: 16px;
    margin-top: 0;
  }

  /* 会议区域 */
  .meeting-section {
    padding-top: 32px;
  }

  .meeting-card {
    padding: 20px;
  }

  .meeting-highlight {
    flex-direction: column;
    gap: 16px;
    padding-bottom: 20px;
    margin-bottom: 16px;
  }

  .meeting-img {
    width: 100%;
    height: auto;
  }

  .meeting-info {
    min-height: auto;
  }

  .meeting-title {
    font-size: 20px;
    margin-bottom: 10px;
  }

  .meeting-summary,
  .meeting-meta,
  .item-date,
  .policy-source,
  .course-source {
    font-size: 14px;
  }

  .meeting-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    font-size: 16px;
  }

  /* 心理健康科普 */
  .tips-section {
    padding-top: 40px;
    padding-bottom: 40px;
  }

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

  .tip-card {
    padding: 20px;
  }

  .tip-title,
  .policy-title,
  .practice-title,
  .safety-title,
  .book-name,
  .reading-tips-title {
    font-size: 20px;
    margin-bottom: 10px;
  }

  .tip-desc,
  .policy-text,
  .practice-desc,
  .safety-desc,
  .reading-intro-text,
  .book-author,
  .book-tag,
  .course-name {
    font-size: 16px;
  }

  .icon-shape {
    width: 36px;
    height: 36px;
  }

  /* 课程区域 */
  .courses-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .course-img {
    height: 220px;
    object-fit: unset;
  }

  .course-info {
    padding: 16px 0 20px;
  }

  .course-name {
    font-size: 18px;
  }

  /* AI政策 */
  .ai-policy-section {
    padding-top: 40px;
  }

  .ai-policy-wrap {
    flex-direction: column;
    gap: 24px;
  }

  .ai-policy-img {
    width: 100%;
    height: auto;
    max-height: 400px;
  }

  .policy-card {
    padding: 20px;
  }

  .policy-header {
    gap: 12px;
  }

  .policy-icon {
    width: 36px;
    height: 36px;
  }

  .policy-title {
    font-size: 20px;
  }

  .policy-text {
    font-size: 16px;
  }

  /* 阅读区域 */
  .reading-section {
    padding-top: 40px;
  }

  .reading-intro-text {
    width: 100%;
    padding: 24px;
    font-size: 16px;
  }

  .reading-tips-card {
    width: 100%;
    padding: 20px;
  }

  .reading-tips-inner {
    padding-left: 0;
  }

  .tips-icon {
    position: static;
    margin-bottom: 12px;
  }

  .reading-tips-list {
    font-size: 16px;
  }

  .reading-deco {
    display: none;
  }

  .book-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .book-img {
    height: 240px;
  }

  .book-info {
    padding: 12px 8px 16px;
  }

  .book-name {
    font-size: 18px;
  }

  .book-author,
  .book-tag {
    font-size: 14px;
  }

  .book-section-title {
    font-size: 20px;
    margin-bottom: 24px;
  }

  /* 实践活动 */
  .practice-section {
    padding-top: 40px;
  }

  .practice-deco-top {
    width: 100%;
    max-width: 280px;
    height: auto;
    margin-bottom: 24px;
  }

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

  .practice-card {
    padding: 24px 16px;
  }

  .practice-img {
    height: 160px;
  }

  .practice-title {
    font-size: 20px;
  }

  .practice-desc {
    font-size: 16px;
  }

  /* 安全提示 */
  .safety-section {
    padding-top: 40px;
  }

  .safety-deco {
    width: 100%;
    max-width: 280px;
    height: auto;
    margin-bottom: 24px;
  }

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

  .safety-card {
    padding: 20px;
  }

  .safety-num {
    font-size: 28px;
  }

  .safety-icon {
    width: 36px;
    height: 36px;
  }

  .safety-title {
    font-size: 20px;
  }

  .safety-desc {
    font-size: 16px;
  }

  /* Footer */
  .footer-bg {
    height: 200px;
  }

  /* 装饰图隐藏 */
  .deco-img,
  .bg-img {
    display: none;
  }

  /* 动画优化 */
  .fade-in,
  .fade-in-left,
  .fade-in-right {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* =========================================
   超小屏适配 (320px - 374px)
   ========================================= */
@media screen and (max-width: 374px) {
  .section-title {
    font-size: 18px;
  }

  .meeting-title,
  .tip-title,
  .policy-title,
  .practice-title,
  .safety-title,
  .book-name,
  .reading-tips-title {
    font-size: 18px;
  }

  .tip-desc,
  .policy-text,
  .practice-desc,
  .safety-desc,
  .reading-intro-text,
  .reading-tips-list,
  .course-name {
    font-size: 14px;
  }

  .book-grid {
    grid-template-columns: 1fr;
  }

  .book-img {
    height: 320px;
  }
}

/* =========================================
   桌面端精确还原 (1024px+)
   ========================================= */
@media screen and (min-width: 1024px) {
  .meeting-section {
    padding-top: 60px;
  }

  .tips-section {
    padding-top: 60px;
  }

  .courses-section {
    padding-top: 60px;
  }

  .ai-policy-section {
    padding-top: 60px;
  }

  .ai-courses-section {
    padding-top: 60px;
  }

  .reading-section {
    padding-top: 60px;
  }

  .practice-section {
    padding-top: 60px;
  }

  .safety-section {
    padding-top: 60px;
  }
}

/* =========================================
   减少动画偏好设置
   ========================================= */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .fade-in,
  .fade-in-left,
  .fade-in-right {
    opacity: 1;
    transform: none;
  }
}

.qrcode-wrapper {
  padding: 80px;
}
.qrcode-box {
  width: 150px;
  margin: 0 auto;
  text-align: center;
  background-color: rgba(0, 0, 0, 0.4);
  color: #fff;
  padding: 15px;
  border-radius: 4px;
  font-size: 16px;
}

.qrcode img {
  width: 100%;
}