/* ---------- 设计变量 ---------- */
:root {
  --blue: #1e9ecc;
  --lime: #b7eb43;
  --green: #37cd5b;
  --red: #e03e12;
  --orange: #fab60c;
  --gray: #49536f;
  --white: #fff;
  --black: #000;
  --primary: var(--blue);
  --secondary: var(--green);
  --tertiary: var(--lime);
  --text: #3f3f3d;
  --text-light: #6b6b68;
  --bg-gray: #f5f5f3;
  --border: #e8e8e5;
  --font-heading: "Poppins", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans SC", sans-serif;
  --font-body: "Inter", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans SC", sans-serif;
  --container: 1240px;
  --radius: 4px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  background-color: var(--white);
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

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

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.4;
  color: var(--black);
  margin-bottom: 1rem;
}

p {
  margin-bottom: 1.2rem;
}

p:last-child {
  margin-bottom: 0;
}

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

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

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 14px 32px;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background 0.25s, color 0.25s, border-color 0.25s, transform 0.2s;
}

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

.btn--primary:hover {
  background: #1789b3;
  color: var(--white);
  transform: translateY(-2px);
}

.btn--secondary {
  background: var(--secondary);
  color: var(--black);
}

.btn--secondary:hover {
  background: #2bb84e;
  color: var(--black);
  transform: translateY(-2px);
}

.btn--tertiary {
  background: var(--lime);
  color: var(--black);
  padding: 12px 24px;
}

.btn--tertiary:hover {
  background: #a6dd2f;
  color: var(--black);
}

.text-link {
  font-weight: 600;
  border-bottom: 2px solid currentColor;
  padding-bottom: 1px;
}

/* ---------- 顶部导航 ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--border);
}

.header__wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
}

/* 导航 Logo：与页脚同一张图（images/footer-logo.png），换图改同名文件即可 */
.header__logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header__logo img {
  height: 44px;
  width: auto;
  transition: transform 0.3s ease;
}
.header__logo-mark {
  height: 34px !important;
}
.header__logo:hover img {
  transform: scale(1.05);
}

.header__logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.header__logo-text strong {
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--black);
}

.header__logo-text em {
  font-style: normal;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: #7a8698;
}

/* ---------- 右上主导航（还原 isc.ciste.org.cn 二级下拉菜单） ---------- */
.header__nav {
  display: flex;
  align-items: center;
  gap: 34px;
}

.nav-list {
  display: flex;
  align-items: stretch;
  height: 76px;
  list-style: none;
}

.nav-item {
  /* 保持 static：让下拉面板以 .header 为定位基准，实现通栏效果 */
  position: static;
  display: flex;
  align-items: stretch;
  margin-right: 36px;
}

.nav-item:last-child {
  margin-right: 0;
}

.nav-link {
  display: flex;
  align-items: center;
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 500;
  color: #333;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: border-bottom-color 0.3s ease;
}

/* 悬停：底部出现蓝色横线（与原站一致，文字色不变） */
.nav-item:hover>.nav-link,
.nav-item.is-expanded>.nav-link,
.nav-item:focus-within>.nav-link {
  border-bottom-color: #365eb9;
}

/* 通栏二级菜单面板 */
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  z-index: 1;
  background: var(--white);
  box-shadow: 0 10px 18px rgba(0, 0, 0, 0.09);
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  visibility: hidden;
  transition: max-height 0.32s ease, opacity 0.25s ease, visibility 0.32s;
}

.nav-item.has-dropdown:hover>.nav-dropdown,
.nav-item.has-dropdown:focus-within>.nav-dropdown {
  max-height: 140px;
  opacity: 1;
  visibility: visible;
}

.nav-dropdown__inner {
  display: flex;
  align-items: center;
  gap: 56px;
  min-height: 58px;
}

.nav-dropdown__item {
  font-family: var(--font-heading);
  font-size: 15px;
  color: #333;
  white-space: nowrap;
}

.nav-dropdown__item:hover {
  color: #365eb9;
}

/* 「会议邮箱」按钮（黑描边样式，同设计稿） */
.header__signup {
  display: flex;
  align-items: center;
  gap: 24px;
}

/* ---------- 中英文切换 ---------- */
.lang-switch {
  display: inline-flex;
  align-items: stretch;
  border: 1px solid var(--border);
  border-radius: 3px;
  overflow: hidden;
}

.lang-switch__btn {
  appearance: none;
  border: none;
  cursor: pointer;
  min-width: 34px;
  padding: 0 8px;
  height: 32px;
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 600;
  line-height: 1;
  color: var(--text-light);
  background: var(--white);
  transition: background 0.2s ease, color 0.2s ease;
}

.lang-switch__btn+.lang-switch__btn {
  border-left: 1px solid var(--border);
}

.lang-switch__btn:hover {
  color: var(--primary);
  background: #f2fafd;
}

.lang-switch__btn--active {
  background: var(--primary);
  color: var(--white);
}

.lang-switch__btn--active:hover {
  background: var(--primary);
  color: var(--white);
}

/* 切换提示气泡 */
.lang-toast {
  position: fixed;
  top: 76px;
  right: 24px;
  z-index: 9999;
  padding: 10px 18px;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--white);
  background: rgba(30, 30, 30, 0.88);
  border-radius: 6px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.lang-toast--show {
  opacity: 1;
  transform: translateY(0);
}


.header__signup a {
  display: inline-flex;
  align-items: center;
  height: 38px;
  padding: 0 18px;
  border: 1.5px solid var(--black);
  border-radius: 3px;
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 500;
  color: var(--black);
  white-space: nowrap;
  transition: background 0.25s ease, color 0.25s ease;
}

.header__signup a:hover {
  background: var(--black);
  color: var(--white);
}


/* ---------- 绿色子导航 ---------- */
.subnav {
  background: var(--secondary);
}

.subnav__wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 62px;
}

.subnav__brand {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 800;
  color: #0e5c26;
}

.subnav__brand:hover {
  color: #0a451c;
}

.subnav__menu {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
}

.subnav__menu a {
  display: block;
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 600;
  color: #08331a;
  padding: 8px 14px;
  border-radius: var(--radius);
}

.subnav__menu a:hover {
  color: var(--black);
  background: rgba(255, 255, 255, 0.35);
}

.header__burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: none;
  border: none;
  cursor: pointer;
}

.header__burger span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--black);
  transition: transform 0.3s, opacity 0.3s;
}

.header__burger.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.header__burger.is-open span:nth-child(2) {
  opacity: 0;
}

.header__burger.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- 首屏 ---------- */
hero {
  display: block;
}

.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 88vh;
  min-height: 88svh;
  padding: 120px 0 140px;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background: #3f80c3;
}

.hero__bg-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  animation: heroZoom 1.2s ease-out both;
}

@keyframes heroZoom {
  from {
    transform: scale(1.06);
    opacity: 0.6;
  }

  to {
    transform: scale(1);
    opacity: 1;
  }
}

.hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: none;
}

.hero__content {
  /* max-width: 780px; */
  animation: fadeUp 0.9s ease-out both;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.breadcrumbs {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 1.6rem;
}

.breadcrumbs a {
  color: var(--white);
}

.breadcrumbs a:hover {
  color: var(--tertiary);
}

.breadcrumbs span {
  margin: 0 4px;
}

.breadcrumbs .current {
  color: rgba(255, 255, 255, 0.7);
}

/* 顶部徽章 */
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: #ffffff;
  padding: 7px 18px;
  border-radius: 6px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.85);
  margin-bottom: 24px;
}

.hero__badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #4bbcd0;
  box-shadow: 0 0 8px rgba(75, 188, 208, 0.9);
}

.hero__title {
  font-size: clamp(26px, 4.2vw, 52px);
  font-weight: 800;
  color: var(--white);
  margin-bottom: 22px;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
  white-space: nowrap;
  line-height: 1.25;
}

/* IDSSD 十年标识 */
.hero__idssd {
  width: min(390px, 72vw);
  max-width: 390px;
  height: auto;
  margin-bottom: 18px;
  filter: drop-shadow(0 2px 10px rgba(0, 0, 0, 0.45));
  opacity: 1;
}

/* 主标题英文翻译 */
.hero__title-en {
  font-family: var(--font-heading);
  font-size: clamp(17px, 2.2vw, 26px);
  font-weight: 600;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.95);
  margin-top: -12px;
  margin-bottom: 16px;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.45);
}

/* 标题下方青色短横线 */
.hero__line {
  display: block;
  width: 68px;
  height: 5px;
  border-radius: 3px;
  margin-top: 20px;
  margin-bottom: 20px;
  background: linear-gradient(90deg, var(--lime), var(--primary));
  box-shadow: 0 2px 12px rgba(30, 158, 204, 0.45);
}

.hero__subtitle {
  font-family: var(--font-heading);
  font-size: clamp(16px, 1.8vw, 20px);
  font-weight: 500;
  color: rgba(255, 255, 255, 0.94);
  margin-bottom: 1.6rem;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 2.4rem;
}

.hero__meta-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 14px;
  font-weight: 500;
  color: var(--white);
  background: rgba(8, 26, 36, 0.42);
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(4px);
  padding: 6px 14px;
  border-radius: 6px;
}

.hero__meta-icon {
  color: #4bbcd0;
  flex-shrink: 0;
}

/* Hero 内按钮：按参考图配色 */
.hero .btn__wrapper {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.hero .btn {
  padding: 10px 40px;
}

.hero .btn--primary {
  background: #5b9bd5;
}

.hero .btn--primary:hover {
  background: #4a8bc7;
}

.btn--white {
  background: #ffffff;
  color: #24343d;
}

.btn--white:hover {
  background: #eef4f6;
  color: #24343d;
  transform: translateY(-2px);
}

.hero__scroll {
  position: absolute;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  color: var(--white);
  animation: bounce 2s infinite;
}

@keyframes bounce {

  0%,
  100% {
    transform: translate(-50%, 0);
  }

  50% {
    transform: translate(-50%, 8px);
  }
}

/* ---------- 通用板块 ---------- */
.section {
  padding: 80px 0;
  scroll-margin-top: 90px;
}

.section--gray {
  background: var(--bg-gray);
}

.section--dark {
  background: var(--black);
}

.section--dark p {
  color: rgba(255, 255, 255, 0.9);
}

.section--dark a {
  color: var(--tertiary);
}

.section--dark a:hover {
  color: var(--white);
}

.section__title {
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 800;
  margin-bottom: 1.8rem;
  position: relative;
  padding-bottom: 14px;
}

.section__title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 56px;
  height: 4px;
  background: var(--primary);
  border-radius: 2px;
}

.section__title--light {
  color: var(--white);
}

.section__title--light::after {
  background: var(--tertiary);
}

.intro {
  font-family: var(--font-heading);
  font-size: clamp(18px, 2.4vw, 24px);
  font-weight: 600;
  line-height: 1.7;
  color: var(--black);
}

/* ---------- 「关于会议」板块背景（采用科学十年原风格：淡色渐变 + 右下角圆环） ---------- */
.section#about {
  background: linear-gradient(180deg, #f4f9fb 0%, #edf6f1 100%);
  position: relative;
  overflow: hidden;
}

/* 背景装饰：右下角淡色圆环 */
.section#about::after {
  content: "";
  position: absolute;
  right: -120px;
  bottom: -160px;
  width: 380px;
  height: 380px;
  border: 44px solid rgba(30, 158, 204, 0.06);
  border-radius: 50%;
  pointer-events: none;
}

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

/* ---------- 「关于会议」标题 ---------- */
.about-head {
  text-align: center;
  margin-bottom: 38px;
}

/* 英文小标签，两侧渐隐横线 */
.about-head__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-heading);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--primary);
}

.about-head__eyebrow::before,
.about-head__eyebrow::after {
  content: "";
  width: 30px;
  height: 1px;
}

.about-head__eyebrow::before {
  background: linear-gradient(90deg, rgba(30, 158, 204, 0), var(--primary));
}

.about-head__eyebrow::after {
  background: linear-gradient(90deg, var(--primary), rgba(30, 158, 204, 0));
}

/* 主标题 */
.about-head__title {
  margin: 14px 0 0;
  font-family: var(--font-heading);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 0.04em;
  color: var(--black);
}

/* 蓝绿渐变装饰线 + 中心圆点 */
.about-head__line {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 18px;
}

.about-head__line::before,
.about-head__line::after {
  content: "";
  width: 70px;
  height: 3px;
  border-radius: 3px;
}

.about-head__line::before {
  background: linear-gradient(90deg, rgba(30, 158, 204, 0), var(--primary));
}

.about-head__line::after {
  background: linear-gradient(90deg, var(--secondary), rgba(55, 205, 91, 0));
}

.about-head__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: 0 0 0 4px rgba(30, 158, 204, 0.1);
}

/* 副标题 */
.about-head__sub {
  max-width: 620px;
  margin: 18px auto 0;
  font-family: var(--font-body);
  font-size: clamp(14px, 1.5vw, 16px);
  line-height: 1.8;
  color: var(--text-light);
}

.muted {
  color: var(--text-light);
  font-size: 15px;
}

.separator {
  border: none;
  border-top: 1px solid var(--border);
  margin: 48px 0 0;
}

/* ---------- 日程：两大板块 ---------- */
.segment-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 28px;
  margin: 40px 0;
}

.segment-card {
  background: var(--white);
  border-top: 4px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}

.segment-card:first-child {
  border-top-color: var(--green);
}

.segment-card:last-child {
  border-top-color: var(--blue);
}

.segment-card h4 {
  font-size: 20px;
}

.segment-tag {
  font-size: 15px;
  margin-top: 12px;
}

.segment-tag--green {
  color: #1e9e46;
}

.segment-tag--blue {
  color: #1073b8;
}

/* ---------- 日程：每日卡片 ---------- */
.day-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 22px;
  margin: 12px 0 40px;
}

.day-card__img {
  aspect-ratio: 1 / 1;
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 14px;
}

.day-card__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.day-card:hover .day-card__img img {
  transform: scale(1.06);
}

.day-card__date {
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--black);
  margin-bottom: 4px;
}

.day-card__badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  padding: 1px 10px;
  border-radius: 100px;
  margin-bottom: 10px;
}

.day-card__badge--green {
  color: #167a38;
  background: rgba(55, 205, 91, 0.15);
}

.day-card__badge--blue {
  color: #1073b8;
  background: rgba(30, 158, 204, 0.14);
}

.day-card h5 {
  font-size: 17px;
  margin-bottom: 6px;
}

.day-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.65;
}

.program-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* ---------- 图库 ---------- */
.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 36px;
}

.gallery__item {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  overflow: hidden;
}

.gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s ease, opacity 0.45s ease;
}

.gallery__item:hover img {
  transform: scale(1.05);
  opacity: 0.9;
}

/* ---------- 手风琴（常见问题） ---------- */
.accordion {
  max-width: 900px;
  border-top: 1px solid var(--border);
}

.accordion__item {
  border-bottom: 1px solid var(--border);
}

.accordion__item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 4px;
  cursor: pointer;
  list-style: none;
}

.accordion__item-header::-webkit-details-marker {
  display: none;
}

.accordion__item-title {
  font-size: 19px;
  margin: 0;
  transition: color 0.2s;
}

.accordion__item-header:hover .accordion__item-title {
  color: var(--primary);
}

.accordion__item-icon {
  position: relative;
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
}

.accordion__item-icon::before,
.accordion__item-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--black);
  transition: transform 0.3s, background 0.3s;
}

.accordion__item-icon::before {
  width: 18px;
  height: 2px;
}

.accordion__item-icon::after {
  width: 2px;
  height: 18px;
}

.accordion__item[open] .accordion__item-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.accordion__item[open] .accordion__item-icon::before,
.accordion__item[open] .accordion__item-icon::after {
  background: var(--primary);
}

.accordion__item-content {
  padding: 0 4px 24px;
  max-width: 760px;
  animation: slideDown 0.35s ease-out;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 主办方 ---------- */
.organizer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin-top: 36px;
}

.organizer h4 {
  font-size: 20px;
}

.organizer__logo {
  margin-top: 28px;
  width: 180px;
  opacity: 0.9;
}

.organizer__logo--wide {
  width: 260px;
}

/* ---------- 页脚（黑色底） ---------- */
.footer {
  position: relative;
  background: #0b0e13;
  color: rgba(255, 255, 255, 0.72);
  padding: 64px 0 26px;
  font-size: 15px;
  overflow: hidden;
}

/* 顶部蓝绿光晕 */
.footer::before {
  content: "";
  position: absolute;
  top: -160px;
  left: 50%;
  transform: translateX(-50%);
  width: 880px;
  height: 280px;
  background: radial-gradient(closest-side, rgba(30, 158, 204, 0.16), transparent 72%);
  pointer-events: none;
}

.footer__grid {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 36px 48px;
}

/* 品牌：Logo + 名称（换 Logo 直接替换 images/footer-logo.png） */
.footer__brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.footer__logo {
  height: 58px;
  width: auto;
}
.footer__logo-mark {
  height: 43px;
}

.footer__brand-name {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.04em;
  line-height: 1.25;
  color: var(--white);
}

.footer__brand-sub {
  font-size: 13px;
  letter-spacing: 0.14em;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 5px;
}

/* 联系方式 */
.footer__title {
  font-family: var(--font-heading);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: 14px;
}

.footer__title span {
  margin-left: 5px;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.26);
}

.footer__contact-note {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.58);
}

.footer__contact-line {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.58);
}

/* 渐变文字邮箱 */
.footer__mail {
  font-family: var(--font-heading);
  font-size: clamp(17px, 2.2vw, 22px);
  font-weight: 700;
  letter-spacing: 0.01em;
  text-decoration: none;
  background: linear-gradient(90deg, #52c7f2, var(--green));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  border-bottom: 2px solid rgba(55, 205, 91, 0);
  transition: border-color 0.25s ease;
}

.footer__mail:hover {
  border-color: rgba(55, 205, 91, 0.65);
}

/* 分隔渐变细线 */
.footer__divider {
  position: relative;
  height: 1px;
  margin: 46px 0 22px;
  border: 0;
  background: linear-gradient(90deg, transparent, rgba(30, 158, 204, 0.45) 22%, rgba(55, 205, 91, 0.45) 78%, transparent);
}

/* 底栏：版权 + 链接 */
.footer__bottom {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 20px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.42);
}

.footer__links {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer__links span {
  color: rgba(255, 255, 255, 0.2);
}

.footer__links a {
  color: rgba(255, 255, 255, 0.55);
  text-decoration: none;
  transition: color 0.25s ease;
}

.footer__links a:hover {
  color: var(--white);
}

/* ==========================================================================
   重要时间点（仿 isc.ciste.org.cn）
   ========================================================================== */
.bannerbox {
  background: url(../images/bannerboxbg.png) no-repeat bottom left #fff;
  background-size: 300px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  padding: 55px 0;
}

.bannerbox .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  position: relative;
}

.titleen {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(24px, 3vw, 34px);
  color: var(--black);
  margin: 0;
}

.titleen--light {
  color: #fff;
}

/* ---------- 统一板块标题：英文眉题 + 中文标题 ---------- */
.sec-head {
  min-width: 0;
}

.sec-eyebrow {
  display: block;
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: #1e9ecc;
  margin-bottom: 8px;
}

.sec-eyebrow--light {
  color: rgba(255, 255, 255, 0.85);
}

.box1right {
  display: flex;
  align-items: center;
  gap: 40px;
}

.box1rightitem {
  display: flex;
  align-items: center;
}

.box1rightitempic,
.box1rightitempic img {
  width: 74px;
}

.box1rightitempic {
  margin-right: 12px;
}

.box1rightitempic img {
  margin-right: 0;
}

.box1rightitemtxtdata {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 18px;
  color: #333;
  margin: 0;
}

.box1rightitemtxttxt {
  font-size: 14px;
  color: #666;
  margin: 0;
}

.huiyi {
  background: rgb(54, 94, 185);
  color: #fff;
  height: 40px;
  line-height: 40px;
  padding: 0 20px;
  font-size: 15px;
  white-space: nowrap;
  transition: background 0.25s;
}

.huiyi:hover {
  background: #2b4b93;
  color: #fff;
}

/* ==========================================================================
   会议嘉宾轮播（仿 isc.ciste.org.cn）
   ========================================================================== */
.theme-carousel {
  padding: 70px 0;
  background: url(../images/theme-carousel.jpeg) no-repeat center center;
  background-size: cover;
}

.guests__title {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 34px;
}

.titleright {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: #fff;
  background: url(../images/titlerightb.png) no-repeat left bottom;
  background-size: 100%;
  padding: 0 6px 8px;
  min-width: 62px;
  text-align: center;
  transition: color 0.25s;
}

.titleright:hover {
  color: var(--tertiary);
  background-image: url(../images/titlerightcurb.png);
}

.guest-carousel {
  position: relative;
  padding-bottom: 46px;
}

.guest-carousel__viewport {
  overflow: hidden;
}

.guest-carousel__track {
  display: flex;
  transition: transform 0.55s ease;
}

.guest-slide {
  flex: 0 0 20%;
  padding: 0 15px;
  box-sizing: border-box;
}

.theme-card {
  background: url(../images/swiper-slidebg.jpg) no-repeat bottom center #fff;
  background-size: 100%;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  cursor: pointer;
  text-align: center;
  height: 100%;
  transition: transform 0.3s, box-shadow 0.3s;
}

.theme-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.18);
}

.theme-card-img {
  width: 120px;
  height: 120px;
  border-radius: 120px;
  object-fit: cover;
  display: block;
  margin: 15px auto 0;
}

.theme-card-body {
  padding: 10px;
}

.theme-card-title {
  font-family: var(--font-heading);
  margin: 0 0 5px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-weight: 700;
  text-align: center;
  color: #333;
  font-size: 16px;
}

.theme-card-en {
  height: 24px;
  line-height: 24px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: #888;
  font-size: 13px;
}

.theme-card-desc {
  margin: 0 0 10px;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  font-size: 0.8rem;
  overflow: hidden;
  text-align: center;
  color: #999;
  line-height: 1.6;
}

/* 左右箭头 */
.guest-carousel__arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-70%);
  z-index: 5;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.85);
  color: #365eb9;
  font-size: 17px;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  transition: background 0.25s, color 0.25s;
}

.guest-carousel__arrow:hover {
  background: #fff;
  color: #2b4b93;
}

.guest-carousel__arrow--prev {
  left: -16px;
}

.guest-carousel__arrow--next {
  right: -16px;
}

/* 分页圆点 */
.guest-carousel__pagination {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 8px;
  display: flex;
  justify-content: center;
  gap: 10px;
}

.guest-carousel__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.45);
  cursor: pointer;
  transition: background 0.25s, transform 0.25s;
}

.guest-carousel__dot.is-active {
  background: #fff;
  transform: scale(1.2);
}

/* ---------- 嘉宾详情弹窗 ---------- */
.guest-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
}

.guest-modal.is-open {
  display: flex;
}

.guest-modal__mask {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
}

.guest-modal__box {
  position: relative;
  z-index: 1;
  width: min(420px, calc(100vw - 40px));
  background: #fff;
  border-radius: 8px;
  padding: 36px 28px 30px;
  text-align: center;
  animation: modalIn 0.3s ease-out;
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.guest-modal__avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 18px;
}

.guest-modal__name {
  font-family: var(--font-heading);
  font-size: 20px;
  margin-bottom: 4px;
}

.guest-modal__job {
  font-size: 14px;
  color: #666;
  line-height: 1.8;
}

.guest-modal__close {
  position: absolute;
  top: 8px;
  right: 14px;
  border: none;
  background: none;
  font-size: 28px;
  line-height: 1;
  color: #999;
  cursor: pointer;
}

.guest-modal__close:hover {
  color: #333;
}

/* ==========================================================================
   「往届方向」板块
   ========================================================================== */
.section--tracks {
  background: linear-gradient(180deg, #f2f8fb 0%, #f7faf6 100%);
  position: relative;
  overflow: hidden;
}

/* 右下角淡色装饰圆环 */
.section--tracks::after {
  content: "";
  position: absolute;
  right: -120px;
  bottom: -140px;
  width: 360px;
  height: 360px;
  border: 46px solid rgba(30, 158, 204, 0.05);
  border-radius: 50%;
  pointer-events: none;
}

.tracks__header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 26px;
}

/* 标题样式与「科学十年」一致：左对齐 + 底部渐变短横线 */
.tracks__title {
  font-family: var(--font-heading);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
  color: var(--black);
  position: relative;
  padding-bottom: 12px;
}

.tracks__title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 56px;
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary), var(--green));
}

/* 右侧操作链接 */
.tracks__links {
  display: flex;
  align-items: center;
  gap: 26px;
  flex-shrink: 0;
  padding-bottom: 6px;
}

.tracks__link,
.track-card__more {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-light);
  white-space: nowrap;
  transition: color 0.25s ease;
}

.tracks__link-arrow {
  font-size: 13px;
  transition: transform 0.25s ease;
}

.tracks__link:hover,
.track-card:hover .track-card__more {
  color: var(--primary);
}

.tracks__link:hover .tracks__link-arrow,
.track-card:hover .tracks__link-arrow {
  transform: translateX(4px);
}

/* 五张主题卡 */
.tracks__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}

.track-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 190px;
  padding: 22px 20px 18px;
  background: var(--white);
  border-radius: 12px;
  border-top: 3px solid transparent;
  box-shadow: 0 4px 16px rgba(20, 60, 90, 0.06);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  overflow: hidden;
}

/* 悬停时顶部出现渐变色条 */
.track-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}

.track-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 14px 30px rgba(20, 60, 90, 0.13);
  border-top-color: rgba(30, 158, 204, 0.15);
}

.track-card:hover::before {
  transform: scaleX(1);
}

/* 渐变大号编号 */
.track-card__num {
  font-family: var(--font-heading);
  font-size: 30px;
  font-weight: 800;
  line-height: 1;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 14px;
}

.track-card__name {
  font-family: var(--font-heading);
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--black);
  flex: 1;
}

.track-card__more {
  margin-top: 12px;
  font-size: 13px;
}

/* ==========================================================================
   「会场与参会信息」板块
   ========================================================================== */
.section--venue {
  position: relative;
  overflow: hidden;
  padding: 72px 0 84px;
  background: #f8f2f1 url("../images/schedule-bg.png") no-repeat center bottom;
  background-size: cover;
}

/* 科技感层：点阵 + 顶部可读性遮罩（不用方格网格） */
.section--venue::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(180deg, rgba(248, 242, 241, 0.94) 0%, rgba(248, 242, 241, 0.4) 40%, rgba(248, 242, 241, 0) 78%),
    radial-gradient(rgba(30, 158, 204, 0.35) 1.2px, transparent 1.6px);
  background-size:
    100% 100%,
    22px 22px;
  pointer-events: none;
}

/* 特效：三颗柔和圆形光晕缓慢漂浮（正圆、无扇形光带） */
.section--venue::after {
  content: "";
  position: absolute;
  inset: -12%;
  pointer-events: none;
  background:
    radial-gradient(closest-side circle at 18% 32%, rgba(30, 158, 204, 0.30), rgba(30, 158, 204, 0) 100%),
    radial-gradient(closest-side circle at 82% 58%, rgba(55, 205, 91, 0.26), rgba(55, 205, 91, 0) 100%),
    radial-gradient(closest-side circle at 50% 84%, rgba(75, 188, 208, 0.24), rgba(75, 188, 208, 0) 100%);
  animation: venueFloat 22s ease-in-out infinite alternate;
}

@keyframes venueFloat {

  0% {
    transform: translate3d(0, 0, 0);
  }

  33% {
    transform: translate3d(2%, -2.5%, 0);
  }

  66% {
    transform: translate3d(-2%, 2%, 0);
  }

  100% {
    transform: translate3d(1.5%, 1.5%, 0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .section--venue::after {
    animation: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .section--venue::after {
    animation: none;
  }
}

.venue__header,
.venue__grid {
  position: relative;
  z-index: 1;
}

.venue__header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 26px;
}

/* 标题与「征稿主题 / 科学十年」同款：左对齐 + 底部渐变短横线 */
.venue__title {
  font-family: var(--font-heading);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
  color: var(--black);
  position: relative;
  padding-bottom: 12px;
}

.venue__title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 56px;
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary), var(--green));
}

.venue__note {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding-bottom: 4px;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-light);
  white-space: nowrap;
  transition: color 0.25s ease;
}

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

/* 两栏布局 */
.venue__grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr;
  gap: 22px;
}

.venue-card {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 14px;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.venue-card:hover {
  box-shadow: 0 14px 30px rgba(20, 60, 90, 0.1);
  transform: translateY(-4px);
}

/* 左卡：地图占位 */
.venue-card--map {
  min-height: 300px;
  padding: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.venue-map__placeholder {
  position: relative;
  width: 100%;
  align-self: stretch;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid #d5e3ec;
  border-radius: 6px;
  background: linear-gradient(180deg, rgba(10, 30, 50, 0.18) 0%, rgba(10, 30, 50, 0.3) 100%), url(../images/venue-bg.jpg) center / cover no-repeat;
  text-align: center;
  padding: 24px;
  overflow: hidden;
}

.venue-map__pin {
  color: #fff;
  margin-bottom: 8px;
  filter: drop-shadow(0 4px 8px rgba(30, 158, 204, 0.3));
}

.venue-map__city {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 800;
  color: #fff;
}

.venue-map__hint {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 600;
  color: #fff;
}

.venue-map__todo {
  font-size: 13px;
  color: var(--text-light);
}

/* 右卡：快速入口 */
.venue-card--links {
  padding: 26px 26px 20px;
}

.venue-card__subtitle {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  color: var(--black);
  padding-bottom: 12px;
  margin-bottom: 6px;
  border-bottom: 1px solid var(--border);
  position: relative;
}

/* 小蓝条点缀 */
.venue-card__subtitle::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 34px;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.venue-links {
  list-style: none;
}

.venue-links li+li {
  border-top: 1px dashed var(--border);
}

.venue-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 2px;
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  transition: color 0.25s ease, padding-left 0.25s ease;
}

.venue-links a .tracks__link-arrow {
  color: var(--primary);
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.venue-links a:hover {
  color: var(--primary);
  padding-left: 8px;
}

.venue-links a:hover .tracks__link-arrow {
  opacity: 1;
  transform: translateX(0);
}

/* ==========================================================================
   「组织机构」板块
   ========================================================================== */

.section--org {
  position: relative;
  overflow: hidden;
  padding: 72px 0 84px;
  background:
    radial-gradient(640px 320px at 6% -10%, rgba(30, 158, 204, 0.1), transparent 62%),
    radial-gradient(560px 300px at 96% 108%, rgba(55, 205, 91, 0.1), transparent 62%),
    linear-gradient(180deg, #f2f8fb 0%, #ffffff 100%);
}

/* 背景装饰：淡色点阵 + 右上圆环 */
.section--org::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(30, 158, 204, 0.12) 1px, transparent 1.4px);
  background-size: 26px 26px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 58%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 58%);
  pointer-events: none;
}

.section--org::after {
  content: "";
  position: absolute;
  right: -140px;
  top: -160px;
  width: 400px;
  height: 400px;
  border: 52px solid rgba(30, 158, 204, 0.055);
  border-radius: 50%;
  pointer-events: none;
}

.org__header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 26px;
}

.org__title {
  position: relative;
  font-family: var(--font-heading);
  font-size: clamp(24px, 3vw, 30px);
  font-weight: 800;
  color: var(--black);
  padding-bottom: 14px;
}

.org__title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 56px;
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary), var(--green));
}

.org__note {
  font-size: 14px;
  color: #7a8698;
}

.org__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.org-card {
  --org-accent: var(--primary);
  --org-accent-soft: rgba(30, 158, 204, 0.14);
  --org-accent-strong: rgba(30, 158, 204, 0.34);
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 26px 24px 30px;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: 0 6px 18px rgba(20, 60, 90, 0.06);
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease,
    background 0.3s ease;
}

.org-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 34px rgba(20, 60, 90, 0.13);
}

/* 承办单位：绿色系点缀 */
.org-card--accent-green {
  --org-accent: var(--green);
  --org-accent-soft: rgba(55, 205, 91, 0.18);
  --org-accent-strong: rgba(55, 205, 91, 0.42);
}

/* 主办/承办卡：顶部渐变条 + 淡色底 */
.org-card--host {
  background: linear-gradient(180deg, rgba(30, 158, 204, 0.06), rgba(255, 255, 255, 0.55) 58%);
}

.org-card--accent-green.org-card--host {
  background: linear-gradient(180deg, rgba(55, 205, 91, 0.08), rgba(255, 255, 255, 0.55) 58%);
}

.org-card--host::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--org-accent), var(--green));
}

.org-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  margin-bottom: 24px;
}

.org-card__badge {
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
  padding: 6px 11px;
  border-radius: 999px;
}

.org-card__badge--primary {
  color: var(--primary);
  background: rgba(30, 158, 204, 0.1);
}

.org-card__badge--green {
  color: #2aa648;
  background: rgba(55, 205, 91, 0.14);
}

.org-card__badge--muted {
  color: #8a94a6;
  background: #eef1f5;
}

/* 右上角大序号，替代原圆形图标 */
.org-card__idx {
  font-family: var(--font-heading);
  font-size: 30px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -1px;
  color: var(--org-accent-soft);
  transition: color 0.3s ease;
}

.org-card:hover .org-card__idx {
  color: var(--org-accent-strong);
}

.org-card__name {
  margin-bottom: 0;
  font-family: var(--font-heading);
  font-size: 21px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--black);
}

/* 校名下方渐变短杠，呼应「科学十年」标题的装饰线（居中） */
.org-card__name::after {
  content: "";
  display: block;
  width: 34px;
  height: 3px;
  margin: 12px auto;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--org-accent), var(--green));
}

.org-card__sub {
  font-size: 14px;
  color: #7a8698;
}

/* 主办/承办单位校徽：渐变描边圆环 + 白色内盘 */
.org-card__logo {
  flex: 0 0 auto;
  width: 98px;
  height: 98px;
  padding: 5px;
  margin-bottom: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--org-accent), var(--green));
  box-shadow: 0 8px 18px rgba(20, 60, 90, 0.14);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.org-card:hover .org-card__logo {
  transform: scale(1.05) rotate(2deg);
  box-shadow: 0 12px 24px rgba(20, 60, 90, 0.18);
}

.org-card__logo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 50%;
  background: #fff;
}

/* 占位卡预留位置：虚线圆 + 线性图标 */
.org-card__logo--empty {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  background: none;
  border: 1.5px dashed #c3d2dd;
  box-shadow: none;
  color: #b6c4d1;
}

.org-card--placeholder:hover .org-card__logo--empty {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(30, 158, 204, 0.04);
}

/* 占位卡：虚线描边、弱化 */
.org-card--placeholder {
  --org-accent-soft: #e3eaf0;
  --org-accent-strong: #b6c4d1;
  background: transparent;
  border: 1.5px dashed #d5dfe7;
  box-shadow: none;
}

.org-card--placeholder .org-card__name {
  color: var(--gray);
  font-size: 19px;
}

.org-card--placeholder .org-card__name::after {
  background: #d5dfe7;
}

.org-card--placeholder:hover {
  border-color: var(--primary);
  background: rgba(30, 158, 204, 0.035);
  --org-accent-soft: rgba(30, 158, 204, 0.2);
  --org-accent-strong: rgba(30, 158, 204, 0.45);
}

.org-card--placeholder:hover .org-card__name {
  color: var(--black);
}

.org-card--placeholder:hover .org-card__name::after {
  background: linear-gradient(90deg, var(--primary), var(--green));
}

/* 委员会入口卡：右下角箭头提示可点击（文字已居中，无需避让） */
.org-card--link .org-card__sub {
  padding-right: 0;
}

.org-card__arrow {
  position: absolute;
  right: 22px;
  bottom: 28px;
  font-size: 17px;
  line-height: 1;
  color: #b3bfcb;
  transition: transform 0.3s ease, color 0.3s ease;
}

.org-card--link:hover .org-card__arrow {
  transform: translateX(4px);
  color: var(--primary);
}

/* ==========================================================================
   响应式
   ========================================================================== */

/* 平板 */
@media (max-width: 1024px) {

  /* 组织机构 */
  .org__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* 往届方向 */
  .tracks__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* 重要时间点 & 会议嘉宾 */
  .guest-slide {
    flex: 0 0 33.3333%;
  }

  .bannerbox {
    padding: 40px 0;
  }

  .bannerbox .container {
    flex-wrap: wrap;
    justify-content: center;
    row-gap: 20px;
  }

  .box1right {
    gap: 28px;
  }

  .day-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .footer__grid {
    flex-direction: column;
    align-items: flex-start;
    gap: 36px;
  }
}

/* 小平板 / 大屏手机 */
@media (max-width: 820px) {
  .section {
    padding: 60px 0;
  }

  /* 会场与参会信息 */
  .venue__grid {
    grid-template-columns: 1fr;
  }

  .venue-card--map {
    min-height: 220px;
  }

  .venue__header {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  /* 往届方向 */
  .tracks__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .tracks__header {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  .tracks__links {
    flex-wrap: wrap;
    gap: 18px;
    padding-bottom: 0;
  }

  /* 重要时间点 & 会议嘉宾 */
  .guest-slide {
    flex: 0 0 50%;
  }

  .theme-carousel {
    padding: 50px 0;
  }

  .guest-carousel__arrow {
    display: none;
  }

  .box1rightitempic,
  .box1rightitempic img {
    width: 56px;
  }

  /* 导航折叠规则见文件开头的 @media (max-width: 1024px) */

  /* 移动端绿色子导航：横向滚动 */
  .subnav__wrapper {
    min-height: 52px;
    gap: 16px;
  }

  .subnav__brand {
    font-size: 18px;
    flex: 0 0 auto;
  }

  .subnav__menu {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding: 6px 0;
  }

  .subnav__menu::-webkit-scrollbar {
    display: none;
  }

  .subnav__menu a {
    white-space: nowrap;
    padding: 6px 10px;
    font-size: 14px;
  }

  .hero {
    min-height: 76vh;
    padding: 100px 0 120px;
  }

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

  .organizer-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

/* 手机 */
@media (max-width: 560px) {
  .section {
    padding: 48px 0;
  }

  /* 组织机构 */
  .org__grid {
    grid-template-columns: 1fr;
  }

  .org__header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  /* 往届方向 */
  .tracks__grid {
    grid-template-columns: 1fr;
  }

  .track-card {
    min-height: 0;
  }

  .track-card__name {
    flex: none;
  }

  .track-card__more {
    margin-top: 14px;
  }

  /* 重要时间点 & 会议嘉宾 */
  .guest-slide {
    flex: 0 0 100%;
  }

  .bannerbox {
    padding: 32px 0;
  }

  .bannerbox .container {
    flex-direction: column;
  }

  .box1right {
    flex-direction: column;
    gap: 18px;
    align-items: flex-start;
  }

  .box1rightitempic,
  .box1rightitempic img {
    width: 48px;
  }

  .huiyi {
    display: block;
  }

  .theme-card-img {
    width: 100px;
    height: 100px;
    border-radius: 100px;
  }

  .container {
    padding: 0 18px;
  }

  .hero {
    min-height: 84vh;
    padding: 80px 0 100px;
  }

  .hero__title {
    font-size: 21px;
  }

  .hero__badge {
    font-size: 11px;
    padding: 6px 14px;
    margin-bottom: 18px;
  }

  .hero__line {
    width: 40px;
    margin-top: 14px;
    margin-bottom: 14px;
  }

  .btn {
    width: 100%;
    text-align: center;
  }

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

  .day-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .gallery {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .footer {
    padding-top: 48px;
  }

  .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* 超小屏幕 */
@media (max-width: 400px) {
  .day-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   科学十年重点展示
   ========================================================================== */
.section--decade {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(620px 320px at 12% 12%, rgba(55, 205, 91, 0.18), transparent 64%),
    radial-gradient(580px 300px at 88% 88%, rgba(30, 158, 204, 0.2), transparent 64%),
    linear-gradient(135deg, #e8f3f4 0%, #dcedf0 45%, #e3f1f4 100%);
}

/* 背景装饰：淡蓝色网格 */
.section--decade::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, rgba(30, 158, 204, 0.11) 1px, transparent 1px),
    linear-gradient(0deg, rgba(30, 158, 204, 0.11) 1px, transparent 1px);
  background-size: 42px 42px;
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.55) 35%, transparent 75%);
  mask-image: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.55) 35%, transparent 75%);
  pointer-events: none;
}

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

.decade__header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 26px;
}

.decade__title {
  font-family: var(--font-heading);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
  color: var(--black);
  position: relative;
  padding-bottom: 12px;
}

.decade__title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 56px;
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary), var(--green));
}

.decade__more {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 600;
  color: #4a6a75;
  white-space: nowrap;
  padding-bottom: 4px;
  transition: color 0.25s ease;
}

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

.decade__more-arrow {
  display: inline-block;
  margin-left: 6px;
  transition: transform 0.25s ease;
}

.decade__more:hover .decade__more-arrow {
  transform: translateX(4px);
}

/* ---------- 主卡片 ---------- */
.decade-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 48px;
  background: var(--white);
  border-radius: 14px;
  padding: 38px 44px;
  box-shadow: 0 14px 40px rgba(23, 84, 96, 0.1);
  overflow: hidden;
}

/* 左侧渐变装饰条 */
.decade-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 5px;
  background: linear-gradient(180deg, var(--primary), var(--green));
}

/* 右上角淡色 "10" 水印 */
.decade-card__glow {
  position: absolute;
  top: -34px;
  right: 8px;
  font-family: var(--font-heading);
  font-size: 170px;
  font-weight: 900;
  line-height: 1;
  color: rgba(30, 158, 204, 0.05);
  pointer-events: none;
  user-select: none;
}

.decade-card__main {
  flex: 1;
  min-width: 0;
  position: relative;
  z-index: 1;
}

.decade-card__badge {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: #0f7a8a;
  background: rgba(30, 158, 204, 0.1);
  border: 1px solid rgba(30, 158, 204, 0.28);
  border-radius: 999px;
  padding: 5px 14px;
  margin-bottom: 16px;
}

.decade-card__name {
  font-family: var(--font-heading);
  font-size: clamp(20px, 2.4vw, 27px);
  font-weight: 700;
  color: var(--black);
  line-height: 1.35;
  margin-bottom: 12px;
}

.decade-card__desc {
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-light);
  max-width: 620px;
  margin-bottom: 24px;
}

.decade-card__btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-heading);
  font-size: 14.5px;
  font-weight: 600;
  color: var(--white);
  background: linear-gradient(135deg, #1e9ecc, #1789b3);
  border-radius: 999px;
  padding: 11px 26px;
  box-shadow: 0 8px 18px rgba(30, 158, 204, 0.32);
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}

.decade-card__btn:hover {
  background: linear-gradient(135deg, #24aadb, #1e9ecc);
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(30, 158, 204, 0.4);
  color: var(--white);
}

.decade-card__btn svg {
  transition: transform 0.25s ease;
}

.decade-card__btn:hover svg {
  transform: translateX(3px);
}

/* ---------- SDG 目标磁贴（联合国官方配色） ---------- */
.decade-card__sdgs {
  display: flex;
  gap: 16px;
  flex: 0 0 auto;
  position: relative;
  z-index: 1;
}

.sdg-tile {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 148px;
  height: 128px;
  padding: 14px 16px;
  border-radius: 10px;
  color: var(--white);
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.14);
  overflow: hidden;
  position: relative;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

/* 每块磁贴右下角同色系高光 */
.sdg-tile::after {
  content: "";
  position: absolute;
  right: -26px;
  bottom: -26px;
  width: 74px;
  height: 74px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.14);
  pointer-events: none;
}

.sdg-tile:hover {
  transform: translateY(-5px);
  box-shadow: 0 14px 26px rgba(0, 0, 0, 0.2);
  color: var(--white);
}

.sdg-tile--3 {
  background: linear-gradient(160deg, #58b041, #4c9f38);
}

.sdg-tile--4 {
  background: linear-gradient(160deg, #d5293a, #c5192d);
}

.sdg-tile--10 {
  background: linear-gradient(160deg, #e62577, #dd1367);
}

.sdg-tile__num {
  font-family: var(--font-heading);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.sdg-tile__name {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 600;
}

/* ---------- 科学十年板块响应式 ---------- */
@media (max-width: 1024px) {
  .decade-card {
    gap: 32px;
    padding: 32px 34px;
  }

  .sdg-tile {
    width: 128px;
    height: 112px;
  }
}

@media (max-width: 820px) {
  .decade-card {
    flex-direction: column;
    align-items: stretch;
    padding: 28px 24px;
  }

  .decade-card__glow {
    font-size: 130px;
    top: -26px;
  }

  .decade-card__sdgs {
    justify-content: center;
  }
}

@media (max-width: 560px) {
  .about-head {
    margin-bottom: 28px;
  }

  .about-head__eyebrow {
    gap: 8px;
    font-size: 11px;
    letter-spacing: 0.16em;
  }

  .about-head__eyebrow::before,
  .about-head__eyebrow::after {
    width: 16px;
  }

  .about-head__line::before,
  .about-head__line::after {
    width: 44px;
  }

  .about-head__sub {
    margin-top: 14px;
  }

  .decade__header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 20px;
  }

  .decade-card__sdgs {
    flex-wrap: wrap;
    gap: 12px;
  }

  .sdg-tile {
    flex: 1 1 calc(33.33% - 8px);
    min-width: 104px;
    height: 104px;
    padding: 12px;
  }

  .sdg-tile__name {
    font-size: 13.5px;
  }
}

@media (max-width: 400px) {
  .sdg-tile {
    flex-basis: 100%;
    height: 92px;
  }
}

/* ==========================================================================
   右上导航折叠（原站在 992px 折叠，这里取 1100px 以容纳 9 个菜单项）
   ========================================================================== */
@media (max-width: 1100px) {

  .header__burger {
    display: flex;
  }

  .header__nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-height: calc(100vh - 76px);
    overflow-y: auto;
    background: var(--white);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
  }

  .header__nav.is-open {
    display: flex;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    height: auto;
    padding: 8px 22px 4px;
  }

  .nav-item {
    display: block;
    margin-right: 0;
  }

  .nav-link {
    position: relative;
    display: block;
    padding: 13px 28px 13px 4px;
    border-bottom: 1px solid var(--border);
  }

  /* 折叠态不使用底部蓝线，避免与分隔线冲突 */
  .nav-item:hover>.nav-link,
  .nav-item:focus-within>.nav-link {
    border-bottom-color: var(--border);
  }

  /* 带二级菜单的项显示折叠箭头 */
  .nav-item.has-dropdown>.nav-link::after {
    content: "";
    position: absolute;
    top: 50%;
    right: 8px;
    width: 7px;
    height: 7px;
    margin-top: -5px;
    border-right: 2px solid #999;
    border-bottom: 2px solid #999;
    transform: rotate(45deg);
    transition: transform 0.3s ease;
  }

  .nav-item.has-dropdown.is-expanded>.nav-link::after {
    transform: rotate(225deg);
    margin-top: -1px;
  }

  /* 二级菜单：折叠态改为内嵌手风琴面板 */
  .nav-dropdown {
    position: static;
    width: auto;
    max-height: 0;
    opacity: 1;
    visibility: visible;
    box-shadow: none;
    background: #f6f7f9;
    transition: max-height 0.3s ease;
  }

  .nav-list .nav-item.is-expanded>.nav-dropdown {
    max-height: 320px;
  }

  .nav-dropdown__inner {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    min-height: 0;
    padding: 4px 0 4px 16px;
  }

  .nav-dropdown__item {
    display: block;
    padding: 11px 0;
    font-size: 14px;
    color: #555;
    border-bottom: 1px dashed #e2e4e8;
  }

  .nav-dropdown__item:last-child {
    border-bottom: none;
  }

  .header__signup {
    align-self: stretch;
    margin: 16px 22px 22px;
  }

  .header__signup a {
    width: 100%;
    justify-content: center;
  }
}

/* 打印友好 */
@media print {

  .header,
  .hero__scroll {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 40px 0;
  }

  .hero__bg::after {
    background: none;
  }
}

/* ==========================================================================
   内页通用：横幅（新闻动态等列表页）
   ========================================================================== */
.page-banner {
  position: relative;
  overflow: hidden;
  padding: 88px 0 72px;
  background:
    radial-gradient(640px 320px at 18% 0%, rgba(55, 205, 91, 0.22), transparent 62%),
    radial-gradient(720px 360px at 86% 100%, rgba(30, 158, 204, 0.26), transparent 62%),
    linear-gradient(135deg, #0d3b54 0%, #14607e 55%, #1e9ecc 130%);
  color: var(--white);
}

.page-banner__glow {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.14) 1px, transparent 1.5px);
  background-size: 22px 22px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.5) 0%, transparent 85%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.5) 0%, transparent 85%);
  pointer-events: none;
}

.page-banner__inner {
  position: relative;
  z-index: 1;
}

.page-banner__en {
  font-family: var(--font-heading);
  font-size: clamp(15px, 1.6vw, 20px);
  font-weight: 600;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.68);
  margin-bottom: 6px;
}

.page-banner__title {
  font-family: var(--font-heading);
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: 1.2;
  margin: 0 0 16px;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
}

.page-banner__line {
  display: block;
  width: 56px;
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, #37cd5b, #1e9ecc);
  margin-bottom: 22px;
}

.page-banner__crumbs {
  font-size: 14px;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.78);
}

.page-banner__crumbs a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  transition: color 0.25s ease;
}

.page-banner__crumbs a:hover {
  color: var(--white);
  text-decoration: underline;
}

.page-banner__crumb-sep {
  margin: 0 10px;
  opacity: 0.55;
}

.page-banner__crumb-cur {
  color: var(--white);
  font-weight: 600;
}

/* 导航当前页高亮 */
.nav-link--active {
  color: var(--primary);
  font-weight: 700;
}

/* ==========================================================================
   新闻动态列表页
   ========================================================================== */
.news-list {
  position: relative;
  overflow: hidden;
  padding: 72px 0 96px;
  background:
    radial-gradient(560px 300px at 88% -8%, rgba(30, 158, 204, 0.08), transparent 62%),
    radial-gradient(520px 280px at 6% 106%, rgba(55, 205, 91, 0.08), transparent 62%),
    linear-gradient(180deg, #ffffff 0%, #f5fafc 100%);
}

.news-list::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(30, 158, 204, 0.1) 1px, transparent 1.4px);
  background-size: 26px 26px;
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.4) 40%, transparent 80%);
  mask-image: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.4) 40%, transparent 80%);
  pointer-events: none;
}

.news-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

@media (max-width: 960px) {
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .news-grid {
    grid-template-columns: 1fr;
  }

  .page-banner {
    padding: 64px 0 52px;
  }
}

.news-card {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 6px 18px rgba(20, 60, 90, 0.07);
  text-decoration: none;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.news-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 34px rgba(20, 60, 90, 0.14);
}

.news-card__media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
}

.news-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s ease;
}

.news-card:hover .news-card__media img {
  transform: scale(1.06);
}

.news-card__tag {
  position: absolute;
  left: 14px;
  top: 14px;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--white);
  background: linear-gradient(135deg, rgba(20, 96, 126, 0.9), rgba(30, 158, 204, 0.9));
  backdrop-filter: blur(4px);
}

.news-card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 22px 22px 24px;
}

.news-card__title {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--black);
  margin: 0 0 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.25s ease;
}

.news-card:hover .news-card__title {
  color: var(--primary);
}

.news-card__desc {
  font-size: 14px;
  line-height: 1.7;
  color: #7a8698;
  margin: 0 0 18px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card__more {
  margin-top: auto;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--primary);
}

.news-card__more i {
  font-style: normal;
  display: inline-block;
  margin-left: 6px;
  transition: transform 0.25s ease;
}

.news-card:hover .news-card__more i {
  transform: translateX(4px);
}

/* ==========================================================================
   内页通用：横幅（新闻动态等列表页）
   ========================================================================== */
.page-banner {
  position: relative;
  overflow: hidden;
  padding: 40px 0 42px;
  background: radial-gradient(820px 340px at 90% -80px, rgba(183, 235, 67, 0.16), transparent 62% 62%), linear-gradient(105deg, #23689c 0%, #1e9ecc 52%, #62b4d9 100%);
  color: var(--white);
  overflow: hidden;
  color: #fff;
}

.page-banner::after {
  content: "NEWS";
  position: absolute;
  right: -8px;
  bottom: -30px;
  font-family: var(--font-heading);
  font-size: clamp(88px, 15vw, 180px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.08);
  pointer-events: none;
  user-select: none;
}

.page-banner__glow {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.14) 1px, transparent 1.5px);
  background-size: 22px 22px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.5) 0%, transparent 85%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.5) 0%, transparent 85%);
  pointer-events: none;
}

.page-banner__inner {
  position: relative;
  z-index: 1;
}

.page-banner__en {
  font-family: var(--font-heading);
  font-size: clamp(15px, 1.6vw, 20px);
  font-weight: 600;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.68);
  margin-bottom: 6px;
}

.page-banner__title {
  font-family: var(--font-heading);
  font-size: clamp(30px, 4vw, 34px);
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: 1.2;
  margin: 0 0 16px;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
  color: #fff;
}

.page-banner__line {
  display: block;
  width: 56px;
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, #37cd5b, #1e9ecc);
  margin-bottom: 22px;
}

.page-banner__crumbs {
  font-size: 14px;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.78);
}

.page-banner__crumbs a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  transition: color 0.25s ease;
}

.page-banner__crumbs a:hover {
  color: var(--white);
  text-decoration: underline;
}

.page-banner__crumb-sep {
  margin: 0 10px;
  opacity: 0.55;
}

.page-banner__crumb-cur {
  color: var(--white);
  font-weight: 600;
}

/* 导航当前页高亮 */
.nav-link--active {
  color: var(--primary);
  font-weight: 700;
}

/* ==========================================================================
   新闻动态列表页
   ========================================================================== */
.news-list {
  position: relative;
  overflow: hidden;
  padding: 72px 0 96px;
  background:
    radial-gradient(560px 300px at 88% -8%, rgba(30, 158, 204, 0.08), transparent 62%),
    radial-gradient(520px 280px at 6% 106%, rgba(55, 205, 91, 0.08), transparent 62%),
    linear-gradient(180deg, #ffffff 0%, #f5fafc 100%);
}

.news-list::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(30, 158, 204, 0.1) 1px, transparent 1.4px);
  background-size: 26px 26px;
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.4) 40%, transparent 80%);
  mask-image: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.4) 40%, transparent 80%);
  pointer-events: none;
}

.news-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

@media (max-width: 960px) {
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .news-grid {
    grid-template-columns: 1fr;
  }

  .page-banner {
    padding: 64px 0 52px;
  }
}

.news-card {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 6px 18px rgba(20, 60, 90, 0.07);
  text-decoration: none;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.news-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 34px rgba(20, 60, 90, 0.14);
}

.news-card__media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
}

.news-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s ease;
}

.news-card:hover .news-card__media img {
  transform: scale(1.06);
}

.news-card__tag {
  position: absolute;
  left: 14px;
  top: 14px;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--white);
  background: linear-gradient(135deg, rgba(20, 96, 126, 0.9), rgba(30, 158, 204, 0.9));
  backdrop-filter: blur(4px);
}

.news-card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 22px 22px 24px;
}

.news-card__title {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--black);
  margin: 0 0 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.25s ease;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-weight: bold;
}

.news-card:hover .news-card__title {
  color: var(--primary);
}

.news-card__desc {
  font-size: 14px;
  line-height: 1.7;
  color: #7a8698;
  margin: 0 0 18px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-weight: bold;
}

.news-card__more {
  margin-top: auto;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--primary);
}

.news-card__more i {
  font-style: normal;
  display: inline-block;
  margin-left: 6px;
  transition: transform 0.25s ease;
}

.news-card:hover .news-card__more i {
  transform: translateX(4px);
}