/*
 * 京电云通（北京）科技有限公司 网站设计系统
 * 主题：科技蓝 / 智慧城市 / 数智化
 * 采用 CSS 变量，便于统一维护与后续换肤
 */

/* ========== CSS 变量 / Design Tokens ========== */
:root {
  /* 品牌色 */
  --color-primary: #0066ff;
  --color-primary-dark: #0052cc;
  --color-accent: #00c6ff;
  --color-gradient: linear-gradient(135deg, #0066ff 0%, #00c6ff 100%);
  --color-gradient-dark: linear-gradient(135deg, #0052cc 0%, #009fd9 100%);

  /* 中性色 */
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-text: #1f2937;
  --color-text-secondary: #6b7280;
  --color-text-muted: #9ca3af;
  --color-border: #e5e7eb;
  --color-footer-bg: #0a1628;
  --color-footer-text: #cbd5e1;

  /* 排版 */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-size-base: 16px;
  --line-height-base: 1.7;

  /* 间距 */
  --container-max-width: 1200px;
  --section-padding-y: 80px;
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 40px;
  --space-xl: 64px;

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.12);
  --shadow-card: 0 8px 24px rgba(0, 102, 255, 0.08);

  /* 过渡 */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* 导航栏高度 */
  --navbar-height: 72px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding-top: var(--navbar-height);
}

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

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

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1, h2, h3, h4, h5, h6, p {
  margin: 0;
}

/* ========== 容器 ========== */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}

/* ========== 顶部导航 ========== */
#top {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--navbar-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(229, 231, 235, 0.6);
  z-index: 9999;
  box-shadow: var(--shadow-sm);
}

#top nav {
  width: 100%;
  height: 100%;
  padding: 0 var(--space-md);
  background: transparent !important;
}

#top nav > ul {
  display: flex;
  align-items: center;
  height: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  gap: var(--space-sm);
}

#top nav > ul > li {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
}

#top .logo {
  display: flex;
  align-items: center;
  margin-right: var(--space-md);
}

#top .logo img {
  width: auto;
  height: 42px;
  object-fit: contain;
}

#top nav a {
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 var(--space-sm);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  position: relative;
  transition: color var(--transition-fast);
}

#top nav > ul > li > a::after {
  content: "";
  position: absolute;
  bottom: 18px;
  left: var(--space-sm);
  right: var(--space-sm);
  height: 2px;
  background: var(--color-gradient);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-base);
  border-radius: var(--radius-full);
}

#top nav > ul > li:hover > a {
  color: var(--color-primary);
}

#top nav > ul > li:hover > a::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* 下拉菜单 */
.dropdown-content {
  position: absolute;
  top: calc(100% - 8px);
  left: 0;
  min-width: 180px;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  padding: var(--space-xs) 0;
  z-index: 10000;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  overflow: hidden;
  pointer-events: none;
}

.dropdown:hover .dropdown-content,
.dropdown:focus-within .dropdown-content {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.dropdown-content a {
  display: block;
  padding: 12px var(--space-md);
  font-size: 14px;
  color: var(--color-text);
  height: auto;
  border-bottom: 1px solid rgba(0, 0, 0, 0.03);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.dropdown-content a:last-child {
  border-bottom: none;
}

.dropdown-content a:hover {
  background: rgba(0, 102, 255, 0.06);
  color: var(--color-primary);
}

.dropdown-content a::after {
  display: none;
}

/* 移动端菜单按钮 */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  margin-left: auto;
}

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  transition: var(--transition-base);
  border-radius: var(--radius-full);
}

/* ========== 通用标题样式 ========== */
.section-title {
  text-align: center;
  font-size: 32px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
  position: relative;
  display: inline-block;
  width: 100%;
}

.section-title::after {
  content: "";
  display: block;
  width: 60px;
  height: 4px;
  background: var(--color-gradient);
  margin: var(--space-sm) auto 0;
  border-radius: var(--radius-full);
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 15px;
  margin-bottom: var(--space-lg);
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.btn-primary {
  background: var(--color-gradient);
  color: #fff;
  box-shadow: 0 4px 14px rgba(0, 102, 255, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(0, 102, 255, 0.45);
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
  background: var(--color-primary);
  color: #fff;
}

.more-details {
  display: inline-flex;
  align-items: center;
  padding: 10px 24px;
  background: var(--color-gradient);
  color: #fff;
  text-decoration: none;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(0, 102, 255, 0.25);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.more-details:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 102, 255, 0.35);
}

/* ========== 卡片 ========== */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  border: 1px solid var(--color-border);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.card-image {
  overflow: hidden;
}

.card-image img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform var(--transition-base);
}

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

.card-body {
  padding: var(--space-md);
}

.card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.card-text {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ========== 页面标题横幅（内页） ========== */
.page-hero {
  position: relative;
  padding: 50px 0 35px;
  background: var(--color-gradient);
  color: #fff;
  text-align: center;
  overflow: hidden;
}

.page-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='0.06'%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");
  opacity: 0.5;
}

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

.page-hero h1 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.page-hero p {
  font-size: 16px;
  opacity: 0.9;
  max-width: 700px;
  margin: 0 auto;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  justify-content: center;
  gap: var(--space-xs);
  font-size: 14px;
  margin-top: var(--space-md);
  opacity: 0.9;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb-sep {
  opacity: 0.6;
}

/* ========== 内容区域 ========== */
.page-content {
  padding: var(--section-padding-y) 0;
}

.content-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-lg);
  max-width: 900px;
  margin: 0 auto;
}

.content-card p {
  margin-bottom: var(--space-md);
  text-align: justify;
}

.content-card img {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin: var(--space-md) auto;
}

/* ========== 首页特殊优化 ========== */
#jiaofuubox {
  width: 100%;
  background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
  padding: 60px 0;
  margin-top: 0;
}

#jiaofu {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

#jiaofu div {
  text-align: center;
  padding: var(--space-md);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base);
}

#jiaofu div:hover {
  transform: translateY(-4px);
}

#jiaofu div span {
  font-size: 42px;
  font-weight: 800;
  background: var(--color-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: none;
}

#jiaofu div p {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-top: var(--space-xs);
}

#little_title {
  color: var(--color-text);
  width: 100%;
  max-width: var(--container-max-width);
  margin: var(--space-xl) auto;
  text-align: center;
}

#little_title img {
  display: block;
  margin: var(--space-sm) auto;
  border-radius: var(--radius-md);
}

/* 公司介绍 */
.jieshao {
  width: 100%;
  display: flex;
  justify-content: center;
  padding: 0 var(--space-md);
}

.jieshao2 {
  width: 100%;
  max-width: 1000px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-lg);
}

.jieshao2 .p1 {
  font-size: 16px;
  line-height: 1.9;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  text-indent: 2em;
}

/* 方案展示网格 */
.hang {
  width: 100%;
  display: flex;
  justify-content: center;
  padding: 0 var(--space-md);
}

.hang1 {
  width: 100%;
  max-width: var(--container-max-width);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.auter {
  display: block;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  text-decoration: none;
  color: inherit;
}

.auter:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  background-color: var(--color-surface);
}

.auter .picture {
  width: 100%;
  height: 220px;
  overflow: hidden;
}

.auter .picture img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.auter:hover .picture img {
  transform: scale(1.08);
}

.auter .bottombar {
  padding: var(--space-md);
  text-align: center;
  border-top: 1px solid var(--color-border);
}

.auter .bottombar h1 {
  font-size: 18px !important;
  font-weight: 700;
  color: var(--color-text);
  transition: color var(--transition-fast);
}

.auter:hover .bottombar h1 {
  color: var(--color-primary);
}

/* 新闻动态 */
.dongtai {
  width: 100%;
  display: flex;
  justify-content: center;
  padding: 0 var(--space-md);
}

.dongtai1 {
  width: 100%;
  max-width: 900px;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.auter1 {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  text-decoration: none;
}

.auter1:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.auter1 .nei1 {
  width: 200px;
  height: 130px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.auter1 .nei1 img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.auter1:hover .nei1 img {
  transform: scale(1.08);
}

.auter1 .nei2 {
  flex: 1;
}

.auter1 .nei2 h1 {
  font-size: 17px !important;
  font-weight: 700;
  color: var(--color-text) !important;
  line-height: 1.5;
  margin-bottom: var(--space-xs);
  transition: color var(--transition-fast);
}

.auter1:hover .nei2 h1 {
  color: var(--color-primary) !important;
}

/* 资质荣誉 */
.zizhi {
  width: 100%;
  display: flex;
  justify-content: center;
  padding: 0 var(--space-md);
}

.zizhi1,
.zizhi2 {
  width: 100%;
  max-width: var(--container-max-width);
  text-align: center;
}

.zizhi1 img,
.zizhi2 img {
  width: 100%;
  max-width: 1000px;
  height: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  margin: var(--space-md) auto;
}

/* ========== 内页内容优化（show1~6 / xinwenneirong） ========== */
.da {
  width: 100%;
  min-height: calc(100vh - var(--navbar-height) - 300px);
  display: flex;
  justify-content: center;
  padding: var(--section-padding-y) var(--space-md);
  background-color: var(--color-bg);
}

.da .da1 {
  width: 100%;
  max-width: 900px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-lg);
}

.da .da1 .dah {
  font-size: 28px;
  font-weight: 700;
  text-align: center;
  color: var(--color-text);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 2px solid var(--color-border);
}

.da .da1 .p1 {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
}

.da .da1 .p2 {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.9;
  margin-bottom: var(--space-md);
  text-indent: 2em;
}

.da .da1 img {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin: var(--space-md) auto;
}

/* 新闻列表 */
.xin {
  width: 100%;
  display: flex;
  justify-content: center;
  padding: var(--section-padding-y) var(--space-md);
  background-color: var(--color-bg);
}

.xin1 {
  width: 100%;
  max-width: 900px;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

/* 公司简介 */
.jiazhi {
  width: 100%;
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  margin: var(--space-md) 0;
}

.jiazhi > div {
  text-align: center;
  padding: var(--space-md);
  background: linear-gradient(135deg, #fff5f5 0%, #fff0f0 100%);
  border-radius: var(--radius-md);
  min-width: 120px;
}

.fa1 {
  font-size: 18px;
  font-weight: 800;
  color: #dc2626;
  margin-bottom: var(--space-xs);
}

.jia {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
}

/* 图片查看器 */
#dowebok {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
  max-width: 700px;
  margin: var(--space-lg) auto;
}

#dowebok li {
  cursor: pointer;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

#dowebok li:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

#dowebok li img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

/* ========== 合作伙伴页 ========== */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  max-width: 1000px;
  margin: 0 auto;
}

.partner-grid img {
  width: 100%;
  height: 160px;
  object-fit: contain;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.partner-grid img:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

/* ========== 联系我们页 ========== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  max-width: 900px;
  margin: 0 auto;
}

.contact-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  text-align: center;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base);
}

.contact-card:hover {
  transform: translateY(-6px);
}

.contact-card-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-sm);
  background: var(--color-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 24px;
}

.contact-card h3 {
  font-size: 18px;
  margin-bottom: var(--space-xs);
}

.contact-card p {
  font-size: 15px;
  color: var(--color-text-secondary);
}

/* ========== 资质荣誉页 ========== */
.honor-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
  max-width: 1000px;
  margin: 0 auto;
}

.honor-grid img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.honor-grid img:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-lg);
}

/* ========== 底部页脚 ========== */
#dibu {
  width: 100%;
  background: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding: 30px 0 20px;
  text-align: center;
}

.dibu2 {
  width: 100%;
  display: flex;
  justify-content: center;
  margin-bottom: var(--space-sm);
}

#dibu img {
  width: 100px;
  height: 100px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  margin: 0 auto;
}

.dibu1 {
  font-size: 14px;
  color: var(--color-footer-text);
  margin: var(--space-xs) 0;
  opacity: 0.9;
}

/* ========== 轮播图优化 ========== */
.swiper {
  width: 100%;
  height: 690px;
  margin-top: 0;
}

.swiper-slide {
  text-align: center;
  font-size: 18px;
  background: #000;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.swiper-slide img {
  display: block;
  width: 100%;
  height: 690px;
  object-fit: cover;
}

.swiper-slide::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(10, 22, 40, 0.6), rgba(10, 22, 40, 0.2));
  pointer-events: none;
}

.swiper_txt111 {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
  color: #fff;
  text-align: center;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
}

.swiper_txt111 p:first-child {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: var(--space-sm);
  letter-spacing: 2px;
}

.swiper_txt1 {
  font-size: 16px;
  letter-spacing: 3px;
  opacity: 0.9;
  text-transform: uppercase;
}

.swiper-button-next,
.swiper-button-prev {
  color: #fff;
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 50%;
  backdrop-filter: blur(4px);
  transition: background var(--transition-fast);
}

.swiper-button-next:hover,
.swiper-button-prev:hover {
  background: rgba(255, 255, 255, 0.3);
}

.swiper-button-next::after,
.swiper-button-prev::after {
  font-size: 20px;
}

.swiper-pagination-bullet {
  width: 10px;
  height: 10px;
  background: rgba(255, 255, 255, 0.5);
  opacity: 1;
}

.swiper-pagination-bullet-active {
  background: #fff;
  width: 28px;
  border-radius: var(--radius-full);
}

/* ========== 响应式适配 ========== */
@media (max-width: 1024px) {
  .hang1 {
    grid-template-columns: repeat(2, 1fr);
  }

  #jiaofu {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {
  :root {
    --navbar-height: 64px;
    --section-padding-y: 48px;
  }

  body {
    padding-top: var(--navbar-height);
  }

  /* 导航栏容器自适应高度 */
  #top {
    height: auto;
    min-height: var(--navbar-height);
  }

  /* 导航栏始终显示：logo + 汉堡按钮 */
  #top nav > ul {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    position: relative;
    top: auto;
    left: auto;
    right: auto;
    flex-direction: row;
    height: auto;
    background: var(--color-surface);
    padding: 0 var(--space-md);
    box-shadow: none;
    gap: 0;
    transform: none;
    opacity: 1;
  }

  #top nav > ul > li {
    float: none;
  }

  .mobile-menu-toggle {
    display: block;
    margin-left: auto;
  }

  /* 默认隐藏所有导航链接，只显示 logo 和汉堡按钮 */
  #top nav > ul > li:not(:first-child):not(.mobile-menu-toggle) {
    display: none;
  }

  /* 点击汉堡按钮后显示所有导航链接 */
  #top nav > ul.open > li:not(:first-child):not(.mobile-menu-toggle) {
    display: block;
    width: 100%;
    height: auto;
    border-bottom: 1px solid var(--color-border);
  }

  #top nav a {
    width: 100%;
    padding: var(--space-sm) 0;
    height: auto;
  }

  #top nav > ul > li > a::after {
    display: none;
  }

  .dropdown-content {
    position: static;
    display: none;
    visibility: hidden;
    opacity: 1;
    transform: none;
    box-shadow: none;
    border: none;
    padding-left: var(--space-md);
    background: transparent;
    pointer-events: none;
  }

  .dropdown.open .dropdown-content {
    display: block;
    visibility: visible;
    pointer-events: auto;
  }

  .dropdown-content a {
    padding: 10px 0;
    border-bottom: none;
  }

  .hang1,
  #jiaofu,
  .partner-grid,
  .honor-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .auter1 {
    flex-direction: column;
  }

  .auter1 .nei1 {
    width: 100%;
    height: 180px;
  }

  .swiper {
    height: 420px;
  }

  .swiper-slide img {
    height: 420px;
  }

  .swiper_txt111 p:first-child {
    font-size: 28px;
  }

  .swiper_txt1 {
    font-size: 12px;
  }

  .section-title {
    font-size: 24px;
  }

  .page-hero {
    padding: 60px 0 40px;
  }

  .page-hero h1 {
    font-size: 26px;
  }

  .content-card,
  .da .da1 {
    padding: var(--space-md);
  }
}

@media (max-width: 480px) {
  .jiazhi {
    flex-direction: column;
    gap: var(--space-sm);
  }

  #dowebok {
    grid-template-columns: 1fr;
  }
}