/* ====== 基础重置和通用样式 ====== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  line-height: 1.6;
  color: #333;
  overflow-x: hidden;
}

/* ====== 布局容器 ====== */
.main-content {
  width: 100%;
  max-width: 1920px;
  margin: 0 auto;
}

/* ====== 页头样式 ====== */
.header {
  background: #961f12;
  width: 100%;
  height: 56px;
  display: flex;
  align-items: center;
  padding: 0 20px 0 0;
  justify-content: space-between;
  position: relative;
}

/* Logo样式 */
.logo a {
  color: white;
  text-decoration: none;
  font-size: 1.2rem;
  font-weight: 900;
  font-family: "Archivo Black", sans-serif;
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-container {
  position: relative;
  display: inline-block;
}

.logo-rectangle {
  height: 56px;
  display: block;
}

.logo-image {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 76px;
  height: 29px;
}

/* 桌面导航 */
.nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.nav-item {
  position: relative;
  display: flex;
  align-items: center;
}

.nav-item a {
  color: white;
  text-decoration: none;
  font-size: 1rem;
  font-weight: 600;
}

/* 下拉菜单 */
.dropdown-icon {
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 5px solid white;
  margin-left: 5px;
  cursor: pointer;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: #961f12;
  min-width: 150px;
  padding: 10px 0;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  z-index: 1000;
}

.nav-item:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
}

.dropdown-menu a {
  display: block;
  padding: 8px 15px;
  font-size: 0.9rem;
  font-weight: 500;
  white-space: nowrap;
}

.dropdown-menu a:hover {
  background: #a92e20;
}

/* 搜索 */
.search {
  display: flex;
  align-items: center;
  margin-left: 1rem;
}

.search svg {
  width: 24px;
  height: 24px;
  cursor: pointer;
}

/* 移动端菜单按钮（默认隐藏） */
.mobile-menu-button {
  display: none;
  cursor: pointer;
  z-index: 1000;
}

.menu-icon {
  width: 30px;
  height: 20px;
  position: relative;
}

.menu-icon::before,
.menu-icon::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 3px;
  background: white;
  left: 0;
}

.menu-icon::before {
  top: 0;
}

.menu-icon::after {
  bottom: 0;
}

.menu-icon span {
  position: absolute;
  width: 100%;
  height: 3px;
  background: white;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
}

/* 移动端导航（默认隐藏） */
.mobile-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: #961f12;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mobile-nav.active {
  opacity: 1;
  visibility: visible;
}

.mobile-nav-content {
  height: 100%;
  display: flex;
  flex-direction: column;
  padding: 20px;
}

.mobile-nav-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
}

.close-button {
  width: 30px;
  height: 30px;
  cursor: pointer;
  position: relative;
}

.close-button span {
  position: absolute;
  width: 100%;
  height: 3px;
  background: white;
  left: 0;
  top: 50%;
}

.close-button span:first-child {
  transform: rotate(45deg) translateY(-50%);
}

.close-button span:last-child {
  transform: rotate(-45deg) translateY(-50%);
}

.mobile-nav-items {
  flex: 1;
}

.mobile-nav-item {
  margin-bottom: 15px;
}

.mobile-nav-item a {
  color: white;
  text-decoration: none;
  font-size: 1.2rem;
  font-weight: 600;
  display: block;
  padding: 10px 0;
  position: relative;
}

.mobile-nav-item:has(.mobile-dropdown) a::after {
  content: '▼';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.8rem;
  transition: transform 0.3s ease;
}

.mobile-nav-item.active:has(.mobile-dropdown) a::after {
  transform: translateY(-50%) rotate(180deg);
}

.mobile-dropdown {
  margin-left: 20px;
  margin-top: 10px;
  display: none;
}

.mobile-nav-item.active .mobile-dropdown {
  display: block;
}

.mobile-dropdown a {
  font-size: 1rem;
  font-weight: 500;
  padding: 8px 0;
}

/* 头部右侧容器（默认隐藏） */
.header-right {
  display: none;
}

/* 桌面搜索（默认显示） */
.desktop-search {
  display: block;
}

/* ====== Hero区域 ====== */
.hero {
  position: relative;
  width: 100%;
  min-height: 800px;
  background-image: url('../images/bg1.png');
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  display: flex;
  flex-direction: column;
  align-items: center;
  color: white;
  text-align: center;
  padding: 108px 20px 40px;
}

.hero h1 {
  font-size: 40px;
  font-weight: 900;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

/* 信息容器 */
.info-container {
  max-width: 1600px;
  width: 100%;
  display: flex;
  gap: 2rem;
  margin-top: 100px;
  min-height:600px;
}

.info-left {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* 盒子基础样式 */
.box1 {
  width: 791px;
  height: auto;
  min-height: 300px;
  background: #7A1207;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-align: left;
  color: #D9D9D9;
}

.box2 {
  width: 791px;
  height: auto;
  min-height: 322px;
  text-align: left;
}

.box3 {
  flex: 1;
  min-width: 700px;
  text-align: left;
}

/* 信息项 */
.info-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.info-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.info-content p {
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  line-height: normal;
  margin: 0;
}

.info-label {
  color: #ffffff;
  font-size: 26px;
  font-style: normal;
  font-weight: 600;
  line-height: normal;
}

.info-label-date {
  font-weight: 700;
}

.info-value {
  color: #ffffff;
  font-size: 26px;
  font-style: normal;
  font-weight: 400;
  line-height: normal;
}

/* 注册区域 */
.registration-section {
  background: rgba(201, 60, 60, 0.73);
  padding: 1.5rem;
  height: 100%;
}

.registration-content {
  display: flex;
  height: 100%;
}

.registration-text {
  flex: 1;
  padding-right: 1.5rem;
}

.registration-text h3 {
  color: #F5F5F5;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 28px;
  font-style: normal;
  font-weight: 400;
  line-height: normal;
  margin: 0 0 1rem 0;
}

.registration-text p {
  color: #F5F5F5;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 26px;
  font-style: normal;
  font-weight: 400;
  line-height: normal;
  margin: 0;
}

.registration-button {
  background: #961F12;
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 250px;
  position: relative;
}

/* 注册按钮边框 */
.registration-button span {
  position: absolute;
  background: #C93C3C;
}

.registration-button .border-top-left {
  top: 0;
  left: 0;
  width: 30%;
  height: 2px;
}

.registration-button .border-top-right {
  top: 0;
  right: 0;
  width: 30%;
  height: 2px;
}

.registration-button .border-bottom-left {
  bottom: 0;
  left: 0;
  width: 30%;
  height: 2px;
}

.registration-button .border-bottom-right {
  bottom: 0;
  right: 0;
  width: 30%;
  height: 2px;
}

.registration-button .border-left-top {
  top: 0;
  left: 0;
  width: 2px;
  height: 30%;
}

.registration-button .border-left-bottom {
  bottom: 0;
  left: 0;
  width: 2px;
  height: 30%;
}

.registration-button .border-right-top {
  top: 0;
  right: 0;
  width: 2px;
  height: 30%;
}

.registration-button .border-right-bottom {
  bottom: 0;
  right: 0;
  width: 2px;
  height: 30%;
}

.registration-button a {
  color: #FFF;
  text-decoration: none;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 28px;
  font-style: normal;
  font-weight: 700;
  line-height: normal;
  text-transform: uppercase;
  position: relative;
  z-index: 1;
}

/* 介绍区域 */
.intro-section {
  background: #7A1207;
  padding: 1.5rem;
  height: auto;
  display: flex;
  flex-direction: column;
  box-shadow: 16px 16px 0px #4D2C29;
}

.intro-section h3 {
  color: #FFF;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 32px;
  font-style: normal;
  font-weight: 900;
  line-height: normal;
  margin-bottom: 1rem;
}

.intro-section p {
  color: #EEE;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 26px;
  font-style: normal;
  font-weight: 400;
  line-height: normal;
  flex: 1;
  padding: 5px;
}

/* ====== 演讲者区域 ====== */
.speakers-section {
  background: #961F12;
  padding: 2rem;
  text-align: center;
}

.speakers-section h2 {
  color: #FFF;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 40px;
  font-style: normal;
  font-weight: 900;
  line-height: normal;
  margin-bottom: 2rem;
}

.speakers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(458px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.speaker {
  width: 458px;
  height: 593px;
  padding: 2rem 1rem 1rem;
  background-image: url('../images/speaker-card-bg.png');
  background-size: cover;
  background-position: center;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  text-align: center;
  cursor: pointer;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.speaker:hover {
  transform: translateY(-10px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.speaker img {
  width: 327px;
  height: 327px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 2.5rem;
  border: 5px solid #D9D9D9;
}

.speaker h3 {
  color: #000;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 28px;
  font-style: normal;
  font-weight: 900;
  line-height: normal;
  margin: 0 0 0.5rem;
}

.speaker p {
  color: #484848;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 24px;
  font-style: normal;
  font-weight: 600;
  line-height: normal;
  margin: 0;
}

/* ====== 征稿区域 ====== */
.cfp-section {
  padding: 6rem;
  background: #ffffff;
}

.cfp-section h2 {
  color: #961F12;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 40px;
  font-style: normal;
  font-weight: 900;
  line-height: normal;
  text-align: center;
  margin-bottom: 150px;
  position: relative;
}

.org-section h2 {
  margin-bottom: 0px;
}

.cfp-section h2::after {
  content: '';
  position: absolute;
  bottom: -50px;
  left: 50%;
  transform: translateX(-50%);
  width: 88px;
  height: 10px;
  background: #961F12;
}

.cfp-section p {
  color: #000;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 24px;
  font-style: normal;
  font-weight: 600;
  line-height: normal;
  margin-bottom: 1.5rem;
  text-align: justify;
  margin-top: 20px;
}

.cfp-section h3 {
  color: #000;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 28px;
  font-style: normal;
  font-weight: 700;
  line-height: normal;
  margin: 2rem 0 1rem;
}

.cfp-section ul {
  color: #000;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 24px;
  font-style: normal;
  font-weight: 600;
  line-height: normal;
  margin-left: 2rem;
}

.cfp-section li {
  margin-bottom: 0.5rem;
}

/* ====== 重要日期区域 ====== */
.dates-section {
  padding: 0 6rem;
  color: white;
  overflow: hidden;
}

.dates-container {
  max-width: 100%;
  margin: 0;
}

.dates-timeline {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.timeline-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  flex: 1;
  padding: 2rem 1rem;
  min-height: 260px;
  z-index: 1;
  cursor: pointer;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.timeline-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

/* 时间线背景色 */
.timeline-item:nth-child(1) {
  background: #961F12;
  z-index: 10;
}

.timeline-item:nth-child(2) {
  background: #BE3323;
  z-index: 9;
}

.timeline-item:nth-child(3) {
  background: #D14334;
  z-index: 8;
}

.timeline-item:nth-child(4) {
  background: #DE5141;
  z-index: 7;
}

.timeline-item:nth-child(5) {
  background: #961F12;
  z-index: 6;
}

/* 时间线箭头形状 */
.timeline-item:not(:last-child) {
  margin-right: 50px;
  clip-path: polygon(0 0, calc(100% - 80px) 0, 95% 50%, calc(100% - 80px) 100%, 0 100%);
}

.timeline-item:not(:first-child) {
  margin-left: -150px;
}

.timeline-icon {
  margin-bottom: 1.5rem;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: #D9D9D9;
  display: flex;
  align-items: center;
  justify-content: center;
}

.timeline-icon svg {
  width: 30px;
  height: 30px;
}

.timeline-item h3 {
  color: #ffffff;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 0.5rem;
  text-align: center;
  padding: 0.5rem 1rem;
  border-radius: 4px;
}

.timeline-item p {
  color: #ffffff;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 18px;
  margin: 0;
  text-align: center;
}

.deadline-note {
  background: #333333;
  color: #ffffff;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 18px;
  font-weight: 700;
  text-align: center;
  padding: 1.5rem;
}

.deadline-note p {
  margin: 0;
}

/* ====== 主题列表区域 ====== */
.topics-section {
  background: #4a4a4a;
  padding: 4rem 2rem 4rem calc(2rem + 20px);
  position: relative;
  margin: 20px 6rem 0 6rem;
}

.topics-section .container {
  max-width: 100%;
  margin: 0;
}

.topics-section h2 {
  color: #ffffff;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 40px;
  font-style: normal;
  font-weight: 900;
  text-align: center;
  margin-bottom: 0.5rem;
  position: relative;
}

.topics-section h2::after {
  content: '';
  display: block;
  width: 80px;
  height: 10px;
  background: #D9D9D9;
  margin: 1rem auto;
}

.topics-section .topics-description {
  color: #ffffff;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 18px;
  text-align: center;
  margin-bottom: 3rem;
  opacity: 0.8;
}

.topics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-bottom: 3rem;
  padding: 2rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.3);
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}

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

.topic-list li {
  color: #ffffff;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 18px;
  font-weight: 400;
  margin-bottom: 0.8rem;
  position: relative;
  padding-left: 1.5rem;
}

.topic-list li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: #ffffff;
}

.topics-section .read-more {
  text-align: center;
}

.topics-section .read-more-btn {
  display: inline-block;
  background: #961F12;
  color: #ffffff;
  padding: 1rem 3rem;
  border-radius: 50px;
  text-decoration: none;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 18px;
  font-weight: 700;
  text-transform: uppercase;
  transition: background 0.3s ease;
}

.topics-section .read-more-btn:hover {
  background: #BE3323;
}

/* 边角装饰 */
.topics-section {
  clip-path: polygon(60px 0, 100% 0,
      100% calc(100% - 60px), calc(100% - 60px) 100%,
      0 100%, 0 60px);
}

/* ====== 主席区域 ====== */
.chairs-section {
  background: #f5f5f5;
  padding: 4rem 2rem;
}

/* 第一个 .chairs-section */
.general-chairs {
  padding: 4rem 2rem 0 2rem;
  /* 上 右 下 左 */
  ;
}

.org-general-chairs {
  padding: 4rem 2rem 0 2rem;
  background: #961F12;
}

/* 第二个 .chairs-section */
.program-chairs {
  padding: 0 2rem 4rem 2rem;
  background: #ffffff;
}

.chairs-section .container {
  /* max-width: 1200px; */
  margin: 0 auto;
}

.chairs-title {
  color: #961F12;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 40px;
  font-weight: 900;
  margin: 0 0 2rem;
  text-align: center;
  position: relative;
  display: inline-block;
  padding: 0 2rem;
}

.org-general-chairs .chairs-title {
  color: #FFFFFF;
}

.chairs-title::before,
.chairs-title::after {
  content: '';
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 350px;
  height: 2px;
  background: #961F12;
}

.org-general-chairs .chairs-title::before,
.org-general-chairs .chairs-title::after {
  content: '';
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 350px;
  height: 2px;
  background: #FFFFFF;
}

.chairs-title::before {
  left: -370px;
}

.chairs-title::after {
  right: -370px;
}

.chairs-category {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 3rem;
}


.chairs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(458px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
  justify-content: center;
  max-width: 100%;
}

.chairs-grid.chairs-grid-small {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  justify-content: center;
  max-width: 100%;
}

.chair-card {
  background-image: url('../images/chair-card-bg.png');
  background-size: cover;
  background-position: center;
  width: 100%;
  max-width: 458px;
  height: 593px;
  margin: 0 auto;
  padding: 2rem 1rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  text-align: center;
  cursor: pointer;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.chair-card-1 {
  background-image: url('../images/chair-card-bg-1.png');
  background-size: cover;
  background-position: center;
}

.chair-card-2 {
  background-image: url('../images/speaker-card-bg.png');
  background-size: cover;
  background-position: center;
}



.chair-card:hover {
  transform: translateY(-10px);
  /* box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15); */
}

.chair-image {
  width: 327px;
  height: 327px;
  border-radius: 50%;
  overflow: hidden;
  margin-bottom: 2.5rem;
  border: 5px solid #D9D9D9;
  display: flex;
  align-items: center;
  justify-content: center;
}

.chair-card-new .chair-image {
  width: 200px;
  height: 200px;
  margin-bottom: 1.2rem;
  flex-shrink: 0;
}

.chair-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.chair-name {
  color: #000;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 28px;
  font-weight: 900;
  margin: 0 0 0.5rem 0;
}

.chair-name-1 {
  color: #ffffff;
}

.chair-affiliation {
  color: #484848;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 22px;
  font-weight: 600;
  margin: 0;
}

.chair-name-1 {
  color: #ffffff;
}

.more-organizers {
  text-align: center;
  margin-top: 2rem;
}

.more-btn {
  display: inline-block;
  background: #961F12;
  color: #ffffff;
  padding: 1rem 3rem;
  border-radius: 50px;
  text-decoration: none;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 18px;
  font-weight: 700;
  text-transform: uppercase;
  transition: background 0.3s ease;
}

.more-btn:hover {
  background: #BE3323;
}

/* ====== 联系区域 ====== */
.contact-section {
  background-image: url("../figma/image/screenshot_18_1013.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  padding: 4rem 2rem;
  position: relative;
}

.contact-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(222, 81, 65, 0.67);
  z-index: 1;
}

.contact-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: #FFF;
}

.contact-content p {
  color: #FFF;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 26px;
  font-style: normal;
  font-weight: 700;
  line-height: normal;
  margin-bottom: 2rem;
}

.contact-btn {
  display: inline-block;
  background: #961F12;
  color: #FFF;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 26px;
  font-style: normal;
  font-weight: 700;
  line-height: normal;
  padding: 1rem 3rem;
  border-radius: 50px;
  text-decoration: none;
  transition: background 0.3s ease;
}

.contact-btn:hover {
  background: #BE3323;
}

/* ====== 页脚 ====== */
.footer {
  background: #961f12;
  color: white;
  padding-top: 2rem;
  text-align: center;
}

.footer h2 {
  margin: 0 0 1.5rem;
  font-size: 28px;
  font-weight: 900;
  font-family: "Archivo Black", sans-serif;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.3);
  flex-wrap: wrap;
  gap: 1rem;
  background: #ffffff;
  color: #A02437;
}

.footer p {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
}

.footer-links {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: #A02437;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: #D9D9D9;
}

/* ====== 新增样式：双列布局和新卡片样式 ====== */
.org-program-chairs {
  padding: 0rem 2rem 0 2rem;
}

.wtsp-chairs {
  background: #F2F2F2;
  padding: 2rem 0rem 0rem 0rem;
}

.wtsp-chairs .container {
  max-width: 1920px;
  margin: 0 auto;
  padding: 0 2rem;
}

.industry-chairs,
.ww-chairs {
  background: #FFFFFF;
  padding: 0 0rem 0rem 0rem;
}

.chairs-row {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.chairs-row .chairs-category {
  flex: 1;
  min-width: 300px;
  margin-bottom: 0;
  max-width: 100%;
}

.chairs-row .chairs-title {
  padding: 0 1rem;
}

.chairs-row .chairs-title::before,
.chairs-row .chairs-title::after {
  width: 100px;
}

.chairs-row .chairs-title::before {
  left: -110px;
}

.chairs-row .chairs-title::after {
  right: -110px;
}

.chairs-row .chairs-grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  max-width: 100%;
}

.chair-card-new {
  background-image: url('../images/chair-card-bg-1.png');
  background-size: cover;
  background-position: center;
  width: 367.184px;
  height: 475.415px;
  margin: 0 auto;
  padding: 2rem 1rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  text-align: center;
  cursor: pointer;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.chair-card-new:hover {
  transform: translateY(-10px);
  
}

.chair-name-new {
  color: #ffffff;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 28px;
  font-weight: 900;
  margin: 0 0 0.5rem 0;
}

.chair-affiliation.chair-name-new {
  color: #ffffff;
  font-size: 22px;
  font-weight: 600;
  margin: 0;
}

.best-paper-award-chairs {
  background: #FFFFFF;
}

.chairs-grid-small {
  grid-template-columns: repeat(2, 458px);
}

.ddpv-chairs {
  background: #F2F2F2;
}

.ddpv-chairs .container {
  max-width: 1920px;
  margin: 0 auto;
}

.chair-card-new-2 {
  background-image: url('../images/chair-card-bg.png');
  background-size: cover;
  background-position: center;
}

.chair-card-3 {
  background-image: url('../images/chair-card-bg-2.png');
  background-size: cover;
  background-position: center;
}
.best-paper-award-chairs .chair-card,
.org-program-chairs .chair-card,   
.org-general-chairs .chair-card{
  width: 367.184px;
  height: 475.415px;
}
.best-paper-award-chairs .chair-card .chair-image,
.org-program-chairs .chair-card .chair-image, 
.org-general-chairs .chair-card .chair-image{
  width: 200px;
  height: 200px;
}



.conference-overview h2{
  margin-bottom: 0;
}

.conference-Venue {
  padding: 1rem 2rem;
  background: #ffffff;
}

.conference-Venue .container {
  padding: 0 2rem;
  margin: 0 auto;
}

.venue-layout {
  display: flex;
  gap: 3rem;
  margin-bottom: 3rem;
  align-items: flex-start;
}

.venue-left {
  flex: 1;
  min-width: 400px;
}

.venue-image {
  width: 100%;
  height: auto;
  max-height: 500px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 1rem;
}

.venue-image-title {
  color: #000000;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 20px;
  font-weight: 600;
  text-align: center;
  margin: 0;
}

.venue-right {
  flex: 1;
  min-width: 400px;
}

.venue-title {
  color: #000000;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.venue-description  {
  color: #000000;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 20px;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 1.5rem;
}
.hotel-location{
  background:#F5F5F5;
  padding: 0 3% 2% 3%;
}
.hotel-location .to-hotel{
	padding-left:2.5rem;
	margin-top:.5rem;
}
.hotel-location .to-hotel p{
	font-size: 20px;
    font-weight: 400;
	
}
.venue-location {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-top: 1rem;
}

.location-icon {
  flex-shrink: 0;
}

.venue-location p {
  color: #961F12;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 20px;
  font-weight: 600;
  margin: 0;
}

.conference-reach {
  padding: 2rem 2rem;
  background: #F2F2F2;
}

.conference-reach .container {
  margin: 0 auto;
  padding: 0 2rem;
  text-align: center;
}
.conference-reach .mtr-note{
	background: #E7E7E7;
	padding: 2rem 1.5rem;
	margin-left: 1.5rem;
	margin-top:  2rem;
	border-left: solid 8px #761C12;
}
.conference-reach .mtr-note p:first-child{
	color: #000;
	font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
	font-size: 22px;
	font-style: normal;
	font-weight: 900;
	line-height: normal;
	margin-bottom: 1rem;
}
.conference-reach .mtr-note p:not(:first-child) {
	color: #000;
	font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
	font-size: 18px;
	font-style: normal;
	font-weight: 600;
	line-height: normal;
}

.how-to-reach-title {
  width: 617px;
  height: 48px;
  text-align: center;
  letter-spacing: 0;
  color: #961f12;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 32px;
  font-weight: 900;
  margin: 0 auto;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.how-to-reach-sub-title{
  margin-top: 18px;
  color: #000;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 18px;
  font-style: normal;
  font-weight: 600;
  line-height: normal;
}
.how-to-reach-title::before,
.how-to-reach-title::after {
  content: '';
  position: absolute;
  width: 77px;
  height: 4px;
  background: #961F12;
}

.how-to-reach-title::before {
  left: -50px;
}

.how-to-reach-title::after {
  right: -50px;
}

.how-to-reach-content {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.how-to-reach-item {
   display: flex;
  overflow: hidden;
  margin: 0 auto;
  width: 100%;
  align-items: stretch; /* 确保子项等高 */
}

.how-to-reach-item  h3.second-item {
	margin-top:2rem;
}


.item-image {
  flex: 0 0 50%;
  overflow: hidden; 
  border-radius:8px;
}

.transport-image {
  width: 100%;
  height: 100%;      /* 占满父容器 */
  display: block;
  object-fit: contain;      /* 或 contain */
}

.item-content {
  flex: 1;
  padding: 0 2rem;
  display: flex;
  flex-direction: column;
  text-align: left;
}

.item-title {
  color: #961F12;
    font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
    font-size: 24px;
    font-style: normal;
    font-weight: 900;
    line-height: normal;
    margin-bottom: 1rem;
}

.item-text {
  color: #000;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 18px;
  margin-bottom: 1rem;
  font-weight: 600;
  font-style: normal;
  line-height: normal;
}
.item-text span{
  font-weight: 900;
}
.item-note {
  color: #000;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 18px;
  font-weight: 600;
}

.item-note a {
  color: #666BF6;
  text-decoration: none;
}

.item-note a:hover {
  text-decoration: underline;
}

/** program overview section css */
.overview-main-content{
  max-width: 100%;
}
.overview-section {
  background: #7A1207;
  padding: 4rem 2rem!important;
  margin-top:0!important;
}

.overview-section h2 {
  color: #FFF;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  
  font-size: 40px;
  font-style: normal;
  font-weight: 900;
  line-height: normal;
  margin-bottom: 0!important;
}


.overview-section h2::after {
  /* 取消 */
  display: none;
}

.overview-line {
  width: 88px;
  height: 10px;
  background: #761C12;
  margin: 2rem auto;
}

.overview-content-section {
  margin: 1rem auto;
}

.overview-content-section h2 {
  text-align: center;
  color: #7A1207;
    font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 32px;
  font-style: normal;
  font-weight: 900;
  line-height: normal;
}

.overview-content {
  margin: 2rem auto;
  text-align: center;
  padding: 0 4rem;
  box-sizing: border-box;
}

.overview-content img {
  width: 80%;
  height: 100%;
  object-fit: cover;
}

.overview-content p {
  color: #000;
  text-align: center;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 24px;
  font-style: normal;
  font-weight: 600;
  line-height: normal;
}

.overview-content div {
  color: #000;
text-align: center;
font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
font-size: 24px;
font-style: normal;
font-weight: 600;
line-height: normal;
}
.overview-content a{
  color: #7A1207;
  text-align: center;
    font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 24px;
  font-style: normal;
  font-weight: 700;
  line-height: 48px; /* 200% */
  text-decoration-line: underline;
  text-decoration-style: solid;
  text-decoration-skip-ink: auto;
  text-decoration-thickness: auto;
  text-underline-offset: auto;
  text-underline-position: from-font;
  display: block;
}

/* cffp base css */
.cffp-section {
  background: #FFFFFF;
  padding: 1rem 4rem;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  
}
.cffp-section p{
  color: #000;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  
  font-size: 24px;
  font-weight: 600;
  line-height: normal;
}

.cffp-section div{
  color: #000;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  
  font-size: 20px;
  font-style: normal;
  font-weight: 400;
  line-height: normal;
}

.cffp-section div ul{
  padding-left: 2rem;
}

.cffp-section .search-box-container{
  padding: 0.5rem 2rem;
}

.cffp-section .dates-timeline p{
  color: #ffffff;
 font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  
  font-size: 18px;
  margin: 0;
  text-align: center;
}
.cffp-section .deadline-note p{
	color: #ffffff;
}


.cffp-section .search-box-container p{
  color: #000000;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  
  font-size: 24px;
  font-style: normal;
  font-weight: 600;
  line-height: normal;

}

.cffp-section .search-box-container div{
  color: #000000;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  
  font-size: 20px;
  font-style: normal;
  font-weight: 400;
  line-height: normal;
}
.cffp-section-overview{
  padding: 3rem 0 1rem 0;
 
}
.cffp-section-overview h2{
 margin-bottom: 0px;
}
.cffp-section-overview h2::after{
  display: none;
 
}
.cffp-section-overview h2::before{
    content: '';
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    width: 88px;
    height: 10px;
    background: #961F12;
}

.cffp-section .coi{
  padding: 1rem 2rem;
  background-color: #F5F5F5;
  margin-bottom: 1rem;
  color: #000;
font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  
font-size: 20px;
font-style: normal;
font-weight: 600;
line-height: normal;
}

.cffp-section .subsidy{
  margin-top: 1rem;
  padding: 1rem 2rem;
  background-color: #961F12;
  margin-bottom: 1rem;
  color: #F5F5F5;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  
  font-size: 18px;
  font-style: normal;
  font-weight: 600;
  line-height: normal;
}

.cffp-section .subsidy span{
  font-weight: 400;
}

.cffp-section .cffp-section-title{
  color: #000;
font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  
font-size: 22px;
font-style: normal;
font-weight: 600;
line-height: normal;
}
.cffp-section .timeline-item{
  min-height: 250px;
}

.cffp-section .visa-table{
  margin-top: 1.5rem;
  border: 1px solid #e3e3e3;
  border-collapse: collapse;
}
.cffp-section .visa-table th{
  padding: .5rem 1rem;
  text-align: left;
  background-color: #F5F5F5;
}
.cffp-section .visa-table td{
  padding: .5rem 1rem;
}
.cffp-section .note{
  background: #E7E7E7;
  font-size: 18px;
	padding: 1rem 1rem;
	margin-top:  1rem;
	border-left: solid 8px #761C12;
  width: fit-content;
}
.cffp-section .note .note-title{
  font-size: 18px;
  font-weight: 600;
  line-height: normal;
  margin-bottom: 1rem;
}

/* ====== 表格样式 ====== */
.pc-table-container {
  width: 100%;
  overflow-x: auto;
  margin: 2rem auto;
}

.pc-table {
  width: 100%;
  border-collapse: collapse;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  table-layout: auto;
}

.pc-table th,
.pc-table td {
  padding: 5px;
  text-align: center;
  border: 1px solid #ddd;
  vertical-align: middle;
  white-space: normal;
  word-wrap: break-word;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
  font-size: 16px;
  font-weight: 600;
}

.pc-table th {
  background-color: #2c3e50;
  color: white;
  font-weight: 700;
  font-size: 16px;
}

.pc-table td:first-child {
  white-space: nowrap;
  font-weight: 700;
  min-width: 120px;
  background-color: #ecf0f1;
}

/* 活动类型颜色 */
.pc-table .registration {
  background-color: #ffffff;
}

.pc-table .tutorials {
  background-color: #DCE6F1;
  color: #000;
}

.pc-table .industry-day {
  background-color: #C5D9F1;
  color: #000;
}

.pc-table .doctoral-consortium {
  background-color: #DAEEF3;
  color: #000;
}

.pc-table .opening-remarks {
  background-color: #FDE9D9;
  color: #000;
}

.pc-table .keynote {
  background-color: #CCC0DA;
  color: #000;
}

.pc-table .coffee-break {
  background-color: #FFF;
  color: #000;
}

.pc-table .poster-session {
  background-color: #F2F2F2;
  color: #000;
}

.pc-table .paper-presentations {
  background-color: #FDE9D9;
  color: #000;
}

.pc-table .demo {
  background-color: #DAEEF3;
  color: #000;
}

.pc-table .lunch {
  background-color: #FFF;
  color: #000;
}

.pc-table .wsdm-business-lunch {
  background-color: #FFF;
    color: #000;
}

.pc-table .wsdm-cup {
  background-color: #C4BD97;
  color: #000;
}

.pc-table .workshops {
  background-color: #C5D9F1;
  color: #000;
}

.pc-table .wsdm-day {
  background-color: #B7DeE8;
  color: #000;
}

.pc-table .closing {
  background-color: #e74c3c;
  color: white;
}

.pc-table .trunover {
  background-color: #F2F2F2;
  color: #000;
}

.pc-table .welcome-reception {
  background-color: #34495e;
  color: white;
}

.pc-table .banquet {
  background-color: #DCE6F1;
  color: #000;
}

/* 移动端表格容器 */
.mobile-tables {
  display: none;
}

.mobile-table-container {
  margin-bottom: 2rem;
  border: 1px solid #ddd;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.mobile-table-container h3 {
  background-color: #961F12;
  color: white;
  padding: 12px;
  margin: 0;
  font-size: 18px;
  font-weight: 700;
}

.mobile-table {
  width: 100%;
  border-collapse: collapse;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
}

.mobile-table th,
.mobile-table td {
  padding: 12px;
  text-align: center;
  border-bottom: 1px solid #ddd;
  vertical-align: middle;
  white-space: normal;
  word-wrap: break-word;
}

.mobile-table th {
  background-color: #f2f2f2;
  font-weight: 700;
  font-size: 14px;
}

.mobile-table tr:hover {
  background-color: #e8f4f8;
}