/* 全局重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Microsoft Yahei", sans-serif;
}

li {
  list-style: none;
}

body {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Microsoft Yahei", sans-serif;
  position: relative;
  min-height: 100vh;
  z-index: 0;
}

.wrapper {
  width: 1200px;
  margin: 0 auto;
}

/* 响应式适配（可选，避免缩放时内容过宽/过窄） */
@media (max-width: 1200px) {
  .wrapper {
    width: 90%; /* 小屏幕时使用百分比宽度 */
  }
}

header .top {
  backgroud-color: #6a131b;
}

.top .right-box h1 {
  width: 364px;
  font-size: 52px;
  color: #fff;
  font-weight: bold;
  text-shadow: 3px 3px 4px rgba(0, 0, 0, 0.3);
  font-family: "KaiTi", "楷体", "STKaiti", "Kaiti SC", "Kaiti TC", serif;
}

/* 主体区域样式 */
.page-main {
  max-width: 1200px;
  margin: 20px auto;
}

.section-title {
  font-size: 27px;
  color: #6a131b;
  font-weight: 400;
  margin-left: 10px;
  text-align: center;
}

.title-box {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 24px;
  position: relative;
}

.title-box img {
  width: 53px;
  height: 24px;
}

.title-box::after {
  content: "";
  position: absolute;
  bottom: -5px;
  width: 1200px;
  height: 2px;
  background-color: #6a131b;
}

/* 
 */
/* 
 */
/* 
 */
/* 
 */
/* banner */
.banner-section {
  width: 100%;
  max-width: 1920px;
  height: 771px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
}

@media (max-width: 1920px) {
  .banner-section {
    height: calc(771px * (100vw / 1920));
  }
}

.banner-list {
  display: flex;
  width: 100%;
  height: 100%;
  transition: transform 0.5s ease;
}

.banner-item {
  flex-shrink: 0;
  width: 100%;
  height: 100%;
}

.banner-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.dots {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 10;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: #fff;
  opacity: 0.6;
  cursor: pointer;
  transition: all 0.3s ease;
}

.dot.active {
  opacity: 1;
  background-color: #1b56a6;
  transform: scale(1.2);
}

.banner-btn {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  transform: translateY(-50%);
  display: flex;
  justify-content: space-between;
  padding: 0 40px;
  z-index: 10;
}

.prev-btn,
.next-btn {
  width: 40px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.2s ease;
  border-radius: 4px;
}

.prev-btn:hover,
.next-btn:hover {
  transform: scale(1.1);
}

.prev-btn img,
.next-btn img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
/* 
 */
/* 
 */
/* 
 */
/* 师生祝福 */
.blessing-section {
  position: relative;
  margin-bottom: 48px;
  /* padding: 0 60px; */
  box-sizing: border-box;
}

.blessing-section .hidden-box {
  overflow: hidden;
}

.blessing-box {
  display: flex;
  transition: transform 0.5s ease;
  padding: 20px 0;
  flex-wrap: nowrap;
  justify-content: flex-start;
  align-items: center;
  gap: 20px;
}

.blessing-item {
  width: 646px;
  height: 495px;
  transition: transform 0.5s ease;
}

.blessing-item video {
  width: 646px;
  height: 495px;
  /* object-fit: cover; */
  display: block;
  transition: all 0.5s ease;
}

.blessing-item.center {
  transform: scale(1.2);
  z-index: 2;
  /* 缩放中心调整为元素中心 */
  transform-origin: center center;
}

.blessing-controls {
  position: absolute;
  top: 60%;
  transform: translateY(-50%);
  z-index: 10;
  left: 0;
  right: 0;
  padding: 0 20px;
  box-sizing: border-box;
}
/* 通用按钮样式 */
.blessing-section .blessing-controls .blessing-btn {
  position: absolute;
  width: 16px;
  height: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.blessing-section .blessing-controls .blessing-btn img {
  width: 36px;
  height: 63px;
}

.blessing-section .blessing-controls .prev-btn {
  left: -80px;
  transform: rotate(180deg);
}

.blessing-section .blessing-controls .next-btn {
  right: -80px;
}

/* 
 */
/* 
 */
/* 
 */
/* 捐赠信息 */
.donation-section {
  padding: 30px 0 20px 0;
  position: relative;
  margin-bottom: 8px;
}

.donation-section::after {
  content: "";
  width: 1920px;
  height: 449px;
  position: absolute;
  top: 10px;
  left: -360px;
  background: #6a131b url(".././img/donation_background.png ");
  background-position: center;
  z-index: -1;
}

.donation-section .donation-title-box .donation-section-title {
  color: #fff;
}

.donation-title-box {
  margin-bottom: 29px;
}

.donation-title-box::after {
  content: "";
  position: absolute;
  bottom: -5px;
  width: 1200px;
  height: 2px;
  background-color: #fff;
}

/* 表格容器 */
.donation-table {
  width: 1136px;
  height: 344px;
  background-color: rgba(255, 255, 255, 1);
  box-shadow: 0 4px 12px 2px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  display: flex;
  margin: 0 auto;
}

/* 表格列样式 */
.table-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  text-align: center;
  border-right: 1px dashed #ccc;
  height: 100%;
}

/* 在 style.css 中添加以下样式 */
/* 捐赠信息控制按钮样式 */
.donation-title {
  display: flex;
  align-items: center;
}

.donation-controls {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-left: 15px;
}

.donation-controls .carousel-btn {
  width: 40px;
  height: 40px;
  color: #923836;
  background-color: rgba(221, 221, 221, 0.1);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
}

.donation-controls .carousel-btn:hover {
  background-color: #923836;
  color: #fff;
}

/* 列宽分配 */
.table-col:nth-child(1) {
  flex: 1;
}
.table-col:nth-child(2) {
  flex: 1;
}
.table-col:nth-child(3) {
  flex: 1;
  border-right: none;
}

/* 表头样式 */
.table-header {
  background-color: #8b1a1a;
  color: #fff;
  padding: 12px 0;
  font-size: 21px;
  /* font-weight: bold; */
  position: sticky;
  top: 0;
  z-index: 10;
}

.table-body {
  height: 288px; /* 强制高度，覆盖可能的冲突样式 */
  position: relative;
  /* 新增：确保内容溢出方向正确 */
}

/* 表格行样式 */
.table-row {
  padding: 12px 0;
  color: #333;
  background-color: transparent;
  height: 36px; /* 固定高度 */
  line-height: 12px; /* 内容高度 = 36px - 24px(padding) = 12px */
  font-size: 16px; /* 限制字体大小，避免换行 */
  display: flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap; /* 防止内容换行增加高度 */
}

/* 行hover效果 */
.table-row:hover {
  background-color: #923836;
  color: #fff;
}

/* 
 */
/* 
 */
/* 
 */
/* 院史长廊 */
.history-section {
  position: relative;
  height: 960px;
}

.history-section::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url(".././img/history_background.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: -1;
}

.title-box.history-title-box {
  margin-bottom: 200px;
}

/* timeline-boxs */
.history-section .history-timeline-box {
  position: relative;
  display: flex;
  gap: 58px;
  width: auto;
}
.history-section .history-timeline-box.second-row {
  position: absolute;
  display: flex;
  gap: 58px;
  width: auto;
  left: -330px;
  top: 480px;
}
.history-section .history-timeline-box.third-row {
  position: absolute;
  display: flex;
  gap: 58px;
  width: auto;
  left: -15px;
  top: 735px;
}

.history-section .history-timeline {
  position: relative;
  display: flex;
  align-items: center;
  width: 126px;
  height: 37px;
}

/* position */
.history-section .history-timeline li .content-box {
  position: absolute;
  top: -104px;
  left: 72px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.history-section .history-timeline li .content-box.red {
  top: -163px;
  left: 70px;
}
/* clockwise-arrow */
.history-section .history-timeline li .content-box.clockwise-arrow1 {
  top: -2px;
  left: -15px;
}
.history-section .history-timeline li .content-box.clockwise-arrow2 {
  top: 60px;
  left: -128px;
}
.history-section .history-timeline li .content-box.clockwise-arrow3 {
  top: 170px;
  left: -348px;
}
/* second row */
.history-section .history-timeline li .content-box.second-row {
  top: -104px;
  left: -100px;
}
.history-section .history-timeline li .content-box.second-row.red {
  top: -162px;
  left: -112px;
}
/* reverse */
.history-section .history-timeline li .content-box.second-row.reverse {
  top: 10px;
  left: -104px;
}
.history-section .history-timeline li .content-box.second-row.red.reverse {
  top: 10px;
  left: -115px;
}
/* counterclockwise-arrow */
.history-section .history-timeline li.counterclockwise_arrow1 {
  position: absolute;
  top: -18px;
  left: -10px;
}
.history-section .history-timeline li.counterclockwise_arrow2 {
  position: absolute;
  top: 65px;
  left: 130px;
}
.history-section .history-timeline li.counterclockwise_arrow3 {
  position: absolute;
  top: 195px;
  left: 335px;
}
/* third row */
.history-section .history-timeline li .content-box.red.reverse {
  top: 8px;
  left: 75px;
}

/* arrow size */
.history-section .history-timeline li img {
  width: 126px;
  height: 33px;
}
/* clock-arrow */
.history-section .history-timeline li .clockwise-arrow1 {
  width: 104px;
  height: 62px;
}
.history-section .history-timeline li .clockwise-arrow2 {
  width: 106px;
  height: 123px;
}
.history-section .history-timeline li .clockwise-arrow3 {
  width: 102px;
  height: 120px;
}
/* counterclcok-arrow */
.history-section .history-timeline li .counterclockwise_arrow1 {
  width: 136px;
  height: 89px;
}
.history-section .history-timeline li .counterclockwise_arrow2 {
  width: 55px;
  height: 127px;
}
.history-section .history-timeline li .counterclockwise_arrow3 {
  width: 130px;
  height: 97px;
}

/*
dot
box
line
*/

/* dot */

.history-section .history-timeline li .content-box .dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px #fff solid;
  background-color: #6f303c;
}

/* box */
.history-section .history-timeline li .content-box .box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;

  box-shadow: 4px 8px hsla(0, 0%, 0%, 0.2);
  background-color: #fff;
  border-right: 2px #6f303c solid;
  border-bottom: 2px #6f303c solid;
  width: 165px;
  height: 140px;
}

/* line */
.history-section .history-timeline li .content-box .line {
  width: 2px;
  background-color: #6f303c;
  height: 30px;
}
.history-section .history-timeline li .content-box .line.red {
  background-color: #6f303c;
  height: 30px;
}

/* animation */
.history-timeline-box {
  opacity: 0;
  transform: translateY(50px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
  visibility: hidden;
  will-change: opacity, transform;
  pointer-events: none;
}

/* 显示状态 */
.history-timeline-box.visible {
  position: absolute;
  left: -15px;
  opacity: 1;
  transform: translateY(0);
  visibility: visible;
  pointer-events: auto;
}

.counterclockwise_arrow1,
.counterclockwise_arrow2,
.counterclockwise_arrow3,
.clockwise-arrow1,
.clockwise-arrow2,
.clockwise-arrow3 {
  opacity: 0;
  transition: opacity 1s ease;
  visibility: hidden;
  will-change: opacity;
}

.arrow-visible {
  opacity: 1;
  visibility: visible;
}

.history-timeline .first-arrow {
  opacity: 0;
  transition: opacity 0.8s ease 0.3s;
}
.history-timeline-box.visible .first-arrow {
  opacity: 1;
}

.counterclockwise_arrow3,
.clockwise-arrow3 {
  transition: opacity 1s ease 0.3s, transform 0.8s ease 0.3s;
  transform: translateY(20px) scale(0.9);
}

.counterclockwise_arrow3.arrow-visible,
.clockwise-arrow3.arrow-visible {
  transform: translateY(0) scale(1);
}

.history-timeline-box.third-row {
  transition-delay: 0.2s;
}
/* 
*/
/* 
*/
/* 
*/
/* memory */
.memory-section {
  position: relative;
  height: 540px;
}
/* background mask */
.memory-section::after {
  content: "";
  width: 1920px;
  height: 632px;
  position: absolute;
  top: -12px;
  left: -360px;
  background: url(".././img/memory_background.png");
  z-index: -1;
}

.memory-title-box::after {
  content: "";
  position: absolute;
  bottom: -5px;
  width: 1200px;
  height: 2px;
  background-color: #fff;
}

.memory-section .title-box {
  margin-bottom: 42px;
}

.memory-section .title-box .memory-section-title {
  color: #fff;
}

/* label */
/* 标签栏容器 */
.tab-nav {
  position: relative;
  display: flex;
  margin-bottom: 15px;
  padding-bottom: 5px;
}

/* 整体下划线 */
.tab-nav::after {
  position: absolute;
  top: 100%;
  left: 0;
  content: "";
  width: 48%;
  height: 2px;
  background-color: #968b94;
}

/* 单个标签 */
.tab-item {
  width: 193px;
  text-align: center;
  cursor: pointer;
  position: relative;
  color: #fff;
  font-size: 24px;
  padding: 0 20px;
}

.tab-item::after {
  content: "";
  position: absolute;
  bottom: -7px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: #fff;
  z-index: 5;
  transition: width 0.3s ease;
}

.tab-item:hover::after,
.tab-item.active::after {
  width: 100%;
}

/* 图片布局 */
.tab-content {
  position: absolute;
  top: 23%;
  display: none;
  width: 1200px;
  height: 430px;
  overflow: hidden;
  transition: all 0.5s;
}

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

.tab-content ul {
  display: grid;
  grid-template-columns: 267px 306px 306px 267px;
  grid-template-rows: 205px 205px;
  gap: 18px;
}

.tab-content ul li {
  border: 6px solid #fff;
}

.tab-content ul li:nth-child(1) {
  grid-row: 1 / span 2;
  grid-column: 1 / 2;
}

.tab-content ul li:nth-child(2) {
  grid-row: 1 / 2;
  grid-column: 2 / 3;
}

.tab-content ul li:nth-child(3) {
  grid-row: 1 / 2;
  grid-column: 3 / 4;
}

.tab-content ul li:nth-child(4) {
  grid-row: 2 / 3;
  grid-column: 2 / 3;
}

.tab-content ul li:nth-child(5) {
  grid-row: 2 / 3;
  grid-column: 3 / 4;
}

.tab-content ul li:nth-child(6) {
  grid-row: 1 / span 2;
  grid-column: 4 / 5;
}

.tab-content ul li img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.carousel-wrap {
  width: 1200px;
  height: 430px;
  transition: all 0.3s;
}

/* 珍贵记忆 · 单图预览 */
.memory-preview-mask {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

.memory-preview-mask.show {
  display: flex;
}

.memory-preview-box {
  position: relative;
  max-width: 90%;
  max-height: 90%;
}

.memory-preview-img {
  max-width: 100%;
  max-height: 100%;
  display: block;
}

.memory-preview-close {
  position: absolute;
  top: -40px;
  right: 0;
  font-size: 32px;
  color: #fff;
  cursor: pointer;
  user-select: none;
}

footer .bottom {
  backgroud-color: #6a131b;
}