/* ============================================================
   全球气候一堂课 - 主样式表
   色彩体系：青绿 (cyan/teal) + 浅蓝 (light blue)
   ============================================================ */

/* --- CSS 变量 --- */
:root {
  --color-primary: #0891b2;
  --color-primary-dark: #0e7490;
  --color-primary-light: #22d3ee;
  --color-primary-50: #ecfeff;
  --color-sky-50: #e0f2fe;
  --color-text: #333;
  --color-text-light: #555;
  --color-text-muted: #888;
  --color-heading: #1e293b;
  --color-white: #fff;
  --color-bg: #f9f9f9;
  --color-footer-bg: #1e293b;
  --color-footer-text: #cbd5e1;
  --shadow-sm: 0 2px 5px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 5px 15px rgba(0, 0, 0, 0.05);
  --shadow-card: 0 2px 10px rgba(0, 0, 0, 0.03);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --transition-fast: 0.3s;
}

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

body {
  font-family: "Helvetica Neue", Helvetica, Arial, "Microsoft Yahei", sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

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

/* --- 通用组件 --- */
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 0;
}

.btn {
  display: inline-block;
  padding: 10px 25px;
  border-radius: var(--radius-sm);
  font-weight: bold;
  cursor: pointer;
  transition: background var(--transition-fast);
  border: none;
  font-size: inherit;
}

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

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

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

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

.section-title {
  font-size: 2rem;
  margin-bottom: 30px;
  text-align: center;
  color: var(--color-heading);
}

/* --- 1. 页眉 Header --- */
header {
  background-color: var(--color-white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
}

.header-logo {
  height: 48px;
  width: auto;
}

nav ul {
  display: flex;
  gap: 30px;
}

nav a {
  font-weight: 500;
  color: var(--color-text-light);
  transition: color var(--transition-fast);
}

nav a:hover,
nav a.current {
  color: var(--color-primary);
}

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

.auth-buttons .btn {
  padding: 8px 20px;
  font-size: 0.9rem;
}

/* --- 2. 轮播区（全屏宽度 Hero Carousel） --- */

/* hero 即轮播容器：占满屏幕宽度，桌面端填满首屏（header 之下到屏幕底部） */
.hero {
  position: relative;
  width: 100%;
  height: 480px; /* 默认高度，移动端使用 */
  overflow: hidden;
  background: var(--color-heading); /* 图片未加载时的底色 */
}

/* 桌面/横屏设备：轮播下沿贴齐屏幕底部 */
@media (min-width: 769px) {
  .hero {
    height: calc(100vh - 78px); /* 78px ≈ header 高度 */
  }
}

/* 轮播轨道 */
.hero .carousel-track {
  display: flex;
  height: 100%;
  transition: transform 0.6s ease-in-out;
}

/* 每张轮播图容器 */
.hero .carousel-slide {
  position: relative;
  min-width: 100%;
  height: 100%;
}

.hero .carousel-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* 图片标题：左下角，随图片一起滑动 */
.carousel-caption {
  position: absolute;
  left: 32px;
  bottom: 32px;
  max-width: 75%;
  padding: 12px 24px;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #fff;
  background: linear-gradient(to right, rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.1));
  border-radius: 4px;
  pointer-events: none;
}

/* 左右切换按钮 — 悬浮于图片之上 */
.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(4px);
  border: none;
  color: var(--color-primary-dark);
  font-size: 1.4rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
  z-index: 10;
}

.carousel-btn:hover {
  background: rgba(255, 255, 255, 0.95);
  color: var(--color-primary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.carousel-prev {
  left: 24px;
}

.carousel-next {
  right: 24px;
}

/* 圆点指示器 — 右下角 */
.carousel-dots {
  display: flex;
  gap: 10px;
  position: absolute;
  bottom: 24px;
  right: 24px;
  z-index: 10;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.55);
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  border: none;
  padding: 0;
}

.carousel-dot.active {
  background-color: rgba(255, 255, 255, 0.95);
  transform: scale(1.3);
}

.carousel-dot:hover {
  background-color: rgba(255, 255, 255, 0.8);
}

/* 向下滚动提示箭头 */
.scroll-hint {
  position: absolute;
  bottom: 60px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  opacity: 0.7;
  animation: scroll-bounce 2s ease-in-out infinite;
  pointer-events: none;
}

@keyframes scroll-bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 0.7; }
  50%      { transform: translateX(-50%) translateY(8px); opacity: 0.35; }
}

/* --- 3. 核心内容区 --- */

/* 板块介绍 */
.features {
  background-color: var(--color-white);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
}

.feature-card {
  background: #f8f9fa;
  padding: 30px;
  border-radius: var(--radius-md);
  text-align: center;
  transition: transform var(--transition-fast);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.feature-card h3 {
  margin: 20px 0 15px;
  font-size: 1.5rem;
  color: var(--color-primary);
}

/* 新闻与活动 */
.news-events {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.news-column h3,
.events-column h3 {
  font-size: 1.4rem;
  margin-bottom: 20px;
  color: var(--color-heading);
}

.news-list,
.event-list {
  display: flex;
  flex-direction: column;
  gap: 25px;
}

.news-item,
.event-item {
  background: var(--color-white);
  padding: 25px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
}

.news-item h4,
.event-item h4 {
  font-size: 1.3rem;
  margin-bottom: 10px;
  color: var(--color-heading);
}

.news-item a:hover,
.event-item a:hover {
  color: var(--color-primary);
}

.news-item .date,
.event-item .date {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 10px;
  display: block;
}

.event-item {
  border-left: 5px solid var(--color-primary);
}

/* --- 4. 数据展示 --- */
.stats {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
  text-align: center;
  padding: 60px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px;
}

.stat-item h3 {
  font-size: 2.5rem;
  margin-bottom: 10px;
}

.stat-item p {
  font-size: 1.1rem;
  opacity: 0.9;
}

/* --- 5. 页脚 --- */
footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding: 60px 0 20px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-col h4 {
  color: var(--color-white);
  margin-bottom: 20px;
  font-size: 1.2rem;
}

.footer-col ul li {
  margin-bottom: 10px;
}

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

.copyright {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid #334155;
  font-size: 0.9rem;
}

/* --- 6. 新闻列表页 --- */

/* 面包屑 */
.breadcrumb {
  background: var(--color-white);
  border-bottom: 1px solid #e2e8f0;
}

.breadcrumb-inner {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.breadcrumb-inner a {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.breadcrumb-inner a:hover {
  color: var(--color-primary);
}

.breadcrumb-sep {
  color: #cbd5e1;
  user-select: none;
}

.breadcrumb-current {
  color: var(--color-heading);
  font-weight: 500;
}

/* 新闻页面标题区 */
.news-header {
  background: var(--color-white);
  padding: 40px 0 30px;
  text-align: center;
}

.news-header h1 {
  font-size: 2rem;
  color: var(--color-heading);
}

.news-header p {
  margin-top: 8px;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* 新闻卡片网格 */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  padding: 40px 0 20px;
}

/* 新闻卡片 */
.news-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.news-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

/* 封面图 */
.news-card-thumb {
  position: relative;
  width: 100%;
  padding-top: 56.25%; /* 16:9 */
  overflow: hidden;
  background: #e2e8f0;
}

.news-card-thumb img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.news-card:hover .news-card-thumb img {
  transform: scale(1.05);
}

/* 卡片上的分类标签 */
.news-card-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 3px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  color: #fff;
  background: var(--color-primary);
  border-radius: 3px;
  z-index: 2;
}

/* 卡片正文区 */
.news-card-body {
  padding: 20px;
}

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

.news-card-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-heading);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color var(--transition-fast);
}

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

.news-card-excerpt {
  margin-top: 10px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 分页 */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  padding: 20px 0 50px;
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 38px;
  padding: 0 6px;
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
  color: var(--color-text-light);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.pagination a:hover {
  background: var(--color-primary-50);
  color: var(--color-primary);
}

.pagination .active {
  background: var(--color-primary);
  color: #fff;
  font-weight: 600;
}

.pagination .disabled {
  color: #cbd5e1;
  pointer-events: none;
}

/* --- 7. 专家智库页 --- */

.experts-list {
  padding: 30px 0 50px;
}

/* 每一行用 grid：头像列固定 110px，文字列自适应 */
.expert-row {
  display: grid;
  grid-template-columns: 110px 1fr;
  grid-template-rows: auto;
  gap: 0 28px;
  align-items: center;
  padding: 18px 0;
  border-bottom: 1px solid #e2e8f0;
}

.expert-row:first-of-type {
  border-top: 1px solid #e2e8f0;
}

/* 头像 */
.expert-avatar {
  width: 110px;
  height: 140px;
  border-radius: 6px;
  overflow: hidden;
  background: #e2e8f0;
}

.expert-avatar img {
  width: 110px;
  height: 140px;
  object-fit: cover;
  display: block;
}

/* 右侧信息 */
.expert-info {
  min-width: 0;
}

.expert-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-heading);
  margin: 0 0 2px 0;
}

.expert-title {
  font-size: 0.85rem;
  color: var(--color-primary);
  font-weight: 500;
  margin: 0 0 8px 0;
}

.expert-bio {
  font-size: 0.93rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* --- 8. 关于我们页 --- */

/* section 通用 */
.about-section { padding: 80px 0; }
.about-section.bg-light { background: #f4f9f6; }
.about-tag {
  display: inline-block; font-size: 12px; letter-spacing: 2px;
  text-transform: uppercase; font-weight: 600;
  color: var(--color-primary); margin-bottom: 12px;
}
.about-section h2 {
  font-size: clamp(24px, 3vw, 38px); font-weight: 700;
  color: var(--color-heading); margin-bottom: 16px;
}
.about-section .about-sub {
  font-size: 16px; color: var(--color-text-muted); max-width: 680px;
  line-height: 1.8; margin-bottom: 56px;
}

/* Hero */
.about-hero {
  position: relative;
  background: linear-gradient(135deg, #0e7490 0%, #0891b2 55%, #38bdf8 100%);
  color: #fff; padding: 100px 0 80px; overflow: hidden;
}
.about-hero::before {
  content: ""; position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E") repeat;
}
.about-hero .container { position: relative; z-index: 1; text-align: center; }
.about-hero .about-tag {
  display: inline-block; background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3); border-radius: 20px;
  padding: 4px 16px; font-size: 13px; letter-spacing: 1px;
  margin-bottom: 20px; color: #fff;
}
.about-hero h1 { font-size: clamp(36px,5vw,58px); font-weight: 800; line-height: 1.2; margin-bottom: 24px; }
.about-hero h1 span { color: #7ee8b4; }
.about-hero p { font-size: 17px; max-width: 600px; margin: 0 auto 36px; opacity: 0.88; }

/* Mission 卡片 2×2 */
.about-mission-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 24px;
}
.about-mission-card {
  background: #fff; border-radius: 16px; padding: 36px 32px;
  border: 1px solid #e2e8f0; transition: box-shadow 0.2s, transform 0.2s;
}
.about-mission-card:hover {
  box-shadow: 0 8px 32px rgba(8,145,178,0.12); transform: translateY(-3px);
}
.about-mission-card .about-mission-icon {
  width: 52px; height: 52px; border-radius: 14px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px; font-size: 24px;
}
.about-mission-card h3 { font-size: 20px; color: var(--color-heading); margin-bottom: 10px; }
.about-mission-card p { font-size: 15px; color: var(--color-text-muted); line-height: 1.75; }

/* Intro 两栏 */
.about-intro-layout {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center;
}
.about-intro-visual {
  border-radius: 20px; overflow: hidden;
  background: linear-gradient(135deg, #0e7490, #0891b2 60%, #38bdf8);
  min-height: 360px; display: flex; flex-direction: column;
  justify-content: flex-end; padding: 36px; color: #fff; position: relative;
}
.about-intro-visual .about-big-num {
  font-size: 72px; font-weight: 900; opacity: 0.12;
  position: absolute; top: 20px; right: 24px; line-height: 1;
}
.about-intro-visual h3 { font-size: 22px; font-weight: 700; margin-bottom: 10px; }
.about-intro-visual p { font-size: 14px; opacity: 0.8; }
.about-stat-row { display: flex; gap: 32px; margin-bottom: 40px; }
.about-stat { text-align: center; }
.about-stat .about-stat-num { font-size: 38px; font-weight: 800; color: var(--color-primary); line-height: 1; }
.about-stat .about-stat-label { font-size: 13px; color: var(--color-text-muted); margin-top: 4px; }
.about-intro-text { font-size: 15px; color: var(--color-text-muted); line-height: 1.9; margin-bottom: 16px; }

/* 时间线 */
.about-timeline-section { background: #f4f9f6; }
.about-timeline { position: relative; padding-left: 32px; max-width: 680px; margin: 0 auto; }
.about-timeline::before {
  content: ""; position: absolute; left: 7px; top: 8px; bottom: 8px;
  width: 2px; background: linear-gradient(to bottom, var(--color-primary), var(--color-primary-light));
}
.about-tl-item { position: relative; margin-bottom: 48px; }
.about-tl-item:last-child { margin-bottom: 0; }
.about-tl-dot {
  position: absolute; left: -32px; top: 6px;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--color-primary); border: 3px solid #fff;
  box-shadow: 0 0 0 2px var(--color-primary);
}
.about-tl-year { font-size: 13px; letter-spacing: 1px; color: var(--color-primary); font-weight: 700; margin-bottom: 6px; }
.about-tl-item h3 { font-size: 20px; font-weight: 700; color: var(--color-heading); margin-bottom: 8px; }
.about-tl-item p { font-size: 15px; color: var(--color-text-muted); max-width: 640px; }

/* 价值观 4 列 */
.about-values-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
.about-value-card {
  padding: 32px 24px; border-radius: 16px; background: #f4f9f6;
  border-left: 4px solid var(--color-primary); transition: background 0.2s;
}
.about-value-card:hover { background: #e6f4ed; }
.about-value-card .about-value-num { font-size: 40px; font-weight: 900; color: var(--color-primary); opacity: 0.18; line-height: 1; margin-bottom: 8px; }
.about-value-card h4 { font-size: 17px; font-weight: 700; color: var(--color-heading); margin-bottom: 8px; }
.about-value-card p { font-size: 14px; color: var(--color-text-muted); }

/* 团队 3 列 */
.about-team-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; }
.about-team-card {
  background: #fff; border-radius: 16px; overflow: hidden;
  border: 1px solid #e2e8f0; transition: box-shadow 0.2s;
}
.about-team-card:hover { box-shadow: 0 8px 28px rgba(8,145,178,0.10); }
.about-team-avatar {
  width: 100%; height: 200px; display: flex; align-items: center; justify-content: center; font-size: 56px;
}
.about-team-avatar.cyan  { background: linear-gradient(135deg, #cffafe, #ecfeff); }
.about-team-avatar.blue  { background: linear-gradient(135deg, #bfdbfe, #eff6ff); }
.about-team-avatar.teal  { background: linear-gradient(135deg, #ccfbf1, #f0fdfa); }
.about-team-info { padding: 24px; }
.about-team-info h4 { font-size: 18px; font-weight: 700; color: var(--color-heading); margin-bottom: 4px; }
.about-team-info .about-team-role { font-size: 13px; color: var(--color-primary); font-weight: 600; margin-bottom: 10px; }
.about-team-info p { font-size: 14px; color: var(--color-text-muted); line-height: 1.7; }

/* CTA */
.about-cta {
  background: linear-gradient(135deg, #0e7490, #0891b2 60%, #38bdf8);
  color: #fff; text-align: center; padding: 100px 24px;
}
.about-cta h2 { font-size: clamp(28px,4vw,46px); font-weight: 800; margin-bottom: 16px; color: #fff; }
.about-cta p { font-size: 17px; opacity: 0.85; margin-bottom: 40px; }
.about-cta .about-btn-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.about-cta .btn-white {
  padding: 14px 36px; border-radius: 50px; font-size: 15px; font-weight: 600;
  background: #fff; color: var(--color-primary-dark); transition: all 0.2s;
}
.about-cta .btn-white:hover { background: #ecfeff; }
.about-cta .btn-outline-white {
  padding: 14px 36px; border-radius: 50px; font-size: 15px; font-weight: 600;
  background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.6); transition: all 0.2s;
}
.about-cta .btn-outline-white:hover { background: rgba(255,255,255,0.12); }

/* --- 9. 文章详情页 --- */

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

/* 文章头部 */
.article-header {
  padding: 40px 0 0;
}

.article-category {
  display: inline-block;
  padding: 3px 12px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-50);
  border-radius: 3px;
  margin-bottom: 16px;
}

.article-header h1 {
  font-size: 2rem;
  color: var(--color-heading);
  line-height: 1.4;
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  padding-bottom: 30px;
  border-bottom: 1px solid #e2e8f0;
}

/* 正文区域 */
.article-body {
  max-width: 860px;
  margin: 0 auto;
  padding: 40px 0 60px;
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--color-text);
}

.article-body h2 {
  font-size: 1.5rem;
  color: var(--color-heading);
  margin: 40px 0 16px;
  padding-left: 12px;
  border-left: 4px solid var(--color-primary);
}

.article-body h3 {
  font-size: 1.2rem;
  color: var(--color-heading);
  margin: 32px 0 12px;
}

.article-body p {
  margin-bottom: 18px;
}

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

.article-body blockquote {
  margin: 24px 0;
  padding: 16px 24px;
  background: var(--color-primary-50);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  border-left: 4px solid var(--color-primary);
  color: var(--color-text-light);
  font-style: italic;
}

.article-body ul,
.article-body ol {
  margin: 16px 0 24px 24px;
}

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

.article-body img {
  max-width: 100%;
  border-radius: var(--radius-sm);
  margin: 24px 0;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.95rem;
}

.article-body th,
.article-body td {
  padding: 10px 14px;
  border: 1px solid #e2e8f0;
  text-align: left;
}

.article-body th {
  background: #f8fafc;
  font-weight: 600;
  color: var(--color-heading);
}

.article-body hr {
  border: none;
  border-top: 1px solid #e2e8f0;
  margin: 30px 0;
}

/* 文章底部提示 */
.article-footer-note {
  margin-top: 40px;
  padding: 20px;
  background: #f8fafc;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* 返回按钮 */
.article-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 40px;
  font-size: 0.9rem;
  color: var(--color-primary);
  font-weight: 500;
  transition: gap var(--transition-fast);
}

.article-back:hover {
  gap: 10px;
}

/* --- 响应式设计 --- */
@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    gap: 15px;
  }

  nav ul {
    gap: 15px;
    flex-wrap: wrap;
    justify-content: center;
  }

  .auth-buttons {
    gap: 8px;
  }

  .hero {
    height: 280px;
  }

  .carousel-btn {
    width: 36px;
    height: 36px;
    font-size: 1rem;
  }

  .carousel-caption {
    left: 16px;
    bottom: 16px;
    font-size: 1rem;
    padding: 8px 16px;
    max-width: 70%;
  }

  .carousel-dots {
    bottom: 16px;
    right: 16px;
  }

  .scroll-hint {
    bottom: 48px;
  }

  .scroll-hint svg {
    width: 22px;
    height: 22px;
  }

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

  .section-title {
    font-size: 1.6rem;
  }

  .header-logo {
    height: 36px;
  }

  /* 新闻列表响应式 */
  .news-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .news-header h1 {
    font-size: 1.5rem;
  }

  .news-card-body {
    padding: 16px;
  }

  /* 文章详情响应式 */
  .article-header h1 {
    font-size: 1.4rem;
  }

  .article-body {
    font-size: 0.95rem;
    padding: 24px 0 40px;
  }

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

  /* 专家列表响应式 */
  .expert-row {
    grid-template-columns: 72px 1fr;
    gap: 0 16px;
    padding: 16px 0;
  }

  .expert-avatar {
    width: 72px;
    height: 92px;
  }

  .expert-avatar img {
    width: 72px;
    height: 92px;
  }

  .expert-name {
    font-size: 1rem;
  }

  .expert-bio {
    -webkit-line-clamp: 2;
    font-size: 0.85rem;
  }

  /* 关于我们响应式 */
  .about-hero { padding: 60px 0; }
  .about-hero h1 { font-size: 1.8rem; }
  .about-section { padding: 50px 0; }
  .about-section h2 { font-size: 1.5rem; }
  .about-mission-grid { grid-template-columns: 1fr; }
  .about-intro-layout { grid-template-columns: 1fr; gap: 36px; }
  .about-values-grid { grid-template-columns: 1fr 1fr; }
  .about-team-grid { grid-template-columns: 1fr; }

  .article-body blockquote {
    padding: 12px 16px;
    font-size: 0.9rem;
  }
}