/* ==================== CSS Variables ==================== */
:root {
  --primary: #0064AD;
  --primary-dark: #005694;
  --primary-light: #e8f4fd;
  --accent: #EC683A;
  --accent-hover: #d55a2e;
  --dark: #1f2022;
  --dark-lighter: #363739;
  --text: #333333;
  --text-muted: #666666;
  --text-light: #999999;
  --border: #dddddd;
  --bg-light: #f4f4f4;
  --bg-white: #ffffff;
  --radius: 4px;
  --transition: all .3s ease;
}

/* ==================== Global Styles ==================== */
* { box-sizing: border-box; }
html,body{
    width:100%;height:100%;margin:0;padding:0;overflow:hidden;
}
body {
  font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  line-height: 1.6;
}
a { text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary); }
img { max-width: 100%; height: auto; }

/* 页面切换基础 */
.page-section { display: block; }
.page-section.active { display: block; }

/* 通用标题 */
.section-title {
  font-weight: 700;
  font-size: 28px;
  padding: 50px 0 40px;
  margin: 0;
  position: relative;
}
.section-title span {
  font-size: 14px;
  font-weight: 400;
  margin-left: 10px;
  color: var(--text-light);
  letter-spacing: 1px;
}
.section-title::after {
  content: '';
  display: block;
  width: 40px;
  height: 3px;
  background: var(--primary);
  margin-top: 15px;
  border-radius: 2px;
}
.section-title.centered { text-align: center; }
.section-title.centered::after { margin-left: auto; margin-right: auto; }

/* ==================== Header ==================== */
.top-bar {
  padding: 15px 0;
  border-bottom: 1px solid #eee;
}
.logo-area {
  display: flex;
  align-items: center;
  gap: 14px;
}
.logo-area img { height: 52px; }
.logo-text { line-height: 1.2; }
.logo-text-cn {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
  text-align: justify;
  text-align-last: justify;
}
.logo-text-en {
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 2.5px;
  font-variant-caps: small-caps;
  text-align: justify;
  text-align-last: justify;
}
.top-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.top-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent);
  color: #fff !important;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  white-space: nowrap;
  transition: var(--transition);
}
.top-btn:hover { background: var(--accent-hover); color: #fff !important; transform: translateY(-1px); }
.top-btn i { font-size: 12px; }

/* ==================== Navigation ==================== */
.main-nav {
  background: var(--primary);
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 1030;
}
.main-nav .navbar-nav .nav-link {
  color: #fff;
  padding: 14px 18px;
  font-size: 15px;
  text-align: center;
  position: relative;
  transition: var(--transition);
}
.main-nav .navbar-nav .nav-link:hover,
.main-nav .navbar-nav .nav-link.active-link {
  background: var(--primary-dark);
}
.main-nav .navbar-nav .nav-link::after {
  content: '';display:none;
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: #fff;
  transition: var(--transition);
  transform: translateX(-50%);
}
.main-nav .navbar-nav .nav-link:hover::after,
.main-nav .navbar-nav .nav-link.active-link::after {
  width: 60%;
}
/* 下拉菜单 */
.main-nav .dropdown-menu {
  border: none;
  border-radius: 0;
  background: #fff;
  box-shadow: 0 6px 20px rgba(0,0,0,.12);
  padding: 8px 0;
  min-width: 140px;
  margin-top: 0;
  animation: fadeDown .2s ease;
}
@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}
.main-nav .dropdown-item {
  padding: 8px 20px;
  font-size: 14px;
  color: var(--text);
  transition: var(--transition);
}
.main-nav .dropdown-item:hover {
  background: var(--primary-light);
  color: var(--primary);
  padding-left: 24px;
}
/* 桌面端hover展开下拉 */
@media (min-width: 992px) {
  .main-nav .dropdown:hover > .dropdown-menu { display: block; }
}
.navbar-toggler {
  border-color: rgba(255,255,255,.3);
  padding: 6px 10px;
}
.navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255,255,255,1%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ==================== Banner ==================== */
.banner-section { position: relative; overflow: hidden; }
.banner-section .swiper { height: 420px; }
.banner-section .swiper-slide {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
.banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,100,173,.35) 0%, transparent 60%);
  z-index: 1;
}
.banner-caption {
  position: absolute;
  bottom: 60px;
  left: 8%;
  z-index: 2;
  color: #fff;
  text-shadow: 0 2px 8px rgba(0,0,0,.3);
}
.banner-caption h2 { font-size: 36px; font-weight: 700; margin-bottom: 10px; }
.banner-caption p { font-size: 16px; opacity: .9; }
.banner-section .swiper-pagination-bullet-active { background: var(--accent); }

/* 二级页Banner */
.page-banner {
  height: 220px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-banner::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='0.05'%3E%3Ccircle cx='30' cy='30' r='2'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.page-banner h1 {
  font-size: 32px;
  font-weight: 700;
  position: relative;
  z-index: 1;
  margin: 0;
}
.page-banner p {
  font-size: 15px;
  opacity: .8;
  position: relative;
  z-index: 1;
  margin: 6px 0 0;
}

.banner {
  /* width: 100%; */
  height: 320px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
  /* box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5); */
}

.slogan {
  display: flex;
  gap: 12px;
  font-size: 80px;
  font-weight: 700;
  letter-spacing: 4px;
}

/* 词组间距 */
/*.slogan span:nth-child(4) { margin-right: 35px; }*/

.keyword {
  display: inline-block;
  opacity: 0;
  will-change: transform, opacity, filter, background-position;
}

/* ========================================================
     系列 1：脉搏生生不息 (12s 循环)
     理念：像心脏跳动一样，缩放是持续不断的高频脉冲，流光如血液奔流，闪烁即心跳的峰值。
     无任何静止帧，入场与退场融入持续的呼吸脉冲中。
     ======================================================== */
  .banner-pulse {
    /* background: radial-gradient(circle at 50% 50%, #002b36 0%, #000 100%); */
  }
  .pulse-text {
    color: transparent;
    background: linear-gradient(90deg, var(--primary) 0%, #ffffff 50%, var(--primary) 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    filter: drop-shadow(0 0 8px var(--primary));
  }

  /* 持续的形态脉冲：从小到大不断跳动，无缝衔接入场与退场 */
  @keyframes pulseLifeScale {
    0%      { opacity: 0; transform: scale(0.2); filter: blur(10px); }
    5%      { opacity: 1; transform: scale(1.15); filter: blur(0); } /* 初始强跳 */
    7%      { transform: scale(0.95); }
    9%      { transform: scale(1.1); }
    11%     { transform: scale(1); }
    /* 持续的微小心跳脉冲，永不停止 */
    20%     { transform: scale(1.06); }
    22%     { transform: scale(0.98); }
    24%     { transform: scale(1.04); }
    26%     { transform: scale(1); }
    40%     { transform: scale(1.08); }
    42%     { transform: scale(0.96); }
    44%     { transform: scale(1.05); }
    46%     { transform: scale(1); }
    60%     { transform: scale(1.07); }
    62%     { transform: scale(0.97); }
    64%     { transform: scale(1.06); }
    66%     { transform: scale(1); }
    80%     { transform: scale(1.12); } /* 末段强跳 */
    82%     { transform: scale(0.9); }
    84%     { transform: scale(1.1); }
    86%     { transform: scale(1); }
    90%     { opacity: 1; transform: scale(1.3); filter: blur(2px); }
    100%    { opacity: 0; transform: scale(0.5); filter: blur(15px); }
  }

  /* 持续的流光奔流：无停顿循环 */
  @keyframes pulseLifeShine {
    0%   { background-position: 200% center; }
    100% { background-position: -200% center; }
  }

  /* 持续的光影闪烁：伴随心跳增强 */
  @keyframes pulseLifeGlow {
    0%, 100%  { filter: drop-shadow(0 0 8px rgba(67, 232, 182, 0.5)) brightness(1); }
    20%, 40%, 60%, 80% { filter: drop-shadow(0 0 25px rgba(67, 232, 182, 1)) brightness(1.6); }
    21%, 41%, 61%, 81% { filter: drop-shadow(0 0 8px rgba(67, 232, 182, 0.5)) brightness(1); }
  }

  .pulse-text:nth-child(1) { animation: pulseLifeScale 12s infinite cubic-bezier(0.4, 0, 0.2, 1), pulseLifeShine 3s infinite linear, pulseLifeGlow 12s infinite linear; }
  .pulse-text:nth-child(2) { animation: pulseLifeScale 12s infinite cubic-bezier(0.4, 0, 0.2, 1) 0.1s, pulseLifeShine 3s infinite linear 0.1s, pulseLifeGlow 12s infinite linear 0.1s; }
  .pulse-text:nth-child(3) { animation: pulseLifeScale 12s infinite cubic-bezier(0.4, 0, 0.2, 1) 0.2s, pulseLifeShine 3s infinite linear 0.2s, pulseLifeGlow 12s infinite linear 0.2s; }
  .pulse-text:nth-child(4) { animation: pulseLifeScale 12s infinite cubic-bezier(0.4, 0, 0.2, 1) 0.3s, pulseLifeShine 3s infinite linear 0.3s, pulseLifeGlow 12s infinite linear 0.3s; }
  .pulse-text:nth-child(5) { animation: pulseLifeScale 12s infinite cubic-bezier(0.4, 0, 0.2, 1) 0.4s, pulseLifeShine 3s infinite linear 0.4s, pulseLifeGlow 12s infinite linear 0.4s; }
  .pulse-text:nth-child(6) { animation: pulseLifeScale 12s infinite cubic-bezier(0.4, 0, 0.2, 1) 0.5s, pulseLifeShine 3s infinite linear 0.5s, pulseLifeGlow 12s infinite linear 0.5s; }
  .pulse-text:nth-child(7) { animation: pulseLifeScale 12s infinite cubic-bezier(0.4, 0, 0.2, 1) 0.6s, pulseLifeShine 3s infinite linear 0.6s, pulseLifeGlow 12s infinite linear 0.6s; }
  .pulse-text:nth-child(8) { animation: pulseLifeScale 12s infinite cubic-bezier(0.4, 0, 0.2, 1) 0.7s, pulseLifeShine 3s infinite linear 0.7s, pulseLifeGlow 12s infinite linear 0.7s; }



/* 面包屑 */
.breadcrumb-bar {
  background: var(--bg-light);
  padding: 12px 0;
  font-size: 13px;
}
.breadcrumb-bar .breadcrumb {
  margin: 0;
  padding: 0;
  background: none;
}
.breadcrumb-bar .breadcrumb-item a { color: var(--text-muted); }
.breadcrumb-bar .breadcrumb-item.active { color: var(--primary); }
.breadcrumb-bar .breadcrumb-item + .breadcrumb-item::before { content: '>'; color: #ccc; }

/* ==================== 首页-公司动态 ==================== */
.news-tabs .nav-pills .nav-link {
  color: var(--text);
  padding: 6px 0;
  margin-right: 30px;
  border-radius: 0;
  font-size: 15px;
  border-bottom: 2px solid transparent;
  background: none;
}
.news-tabs .nav-pills .nav-link.active,
.news-tabs .nav-pills .nav-link:hover {
  color: var(--primary);
  background: none;
  border-bottom-color: var(--primary);
}
.news-list-group { list-style: none; padding: 0; margin: 0; height: 303px; overflow: auto; }
.news-list-group li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px dashed #eee;
  font-size: 14px;
}
.news-list-group li:last-child { border-bottom: none; }
.news-list-group li a {
  flex: 1;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-right: 15px;
}
.news-list-group li a:hover { color: var(--primary); }
.news-list-group li .date { color: var(--text-light); font-size: 13px; flex-shrink: 0; }
.news-img-wrap {
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 16/9;
  background: #eee;
}
.news-img-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.news-img-wrap:hover img { transform: scale(1.05); }

/* ==================== 首页-关于我们 ==================== */
.about-section {
  position: relative;
  padding: 60px 0;
  overflow: hidden;
}
.about-bg-left {
  position: absolute;
  left: 0; top: 0; bottom: 0;
  right:685px;
  background: var(--primary);
  z-index: 0;
}
.about-content {
  position: relative;
  z-index: 1;
  color: #fff;
  padding-right:30px;
}
.about-content .section-title { color: #fff; }
.about-content .section-title::after { background: var(--accent); }
.about-content .section-title span { color: rgba(255,255,255,.6); }
.about-tabs-wrap {
  position: absolute;
  z-index: 100;
  margin-left: auto;
  width: 685px;
  right:0;
}
.about-tab-nav { display: flex; flex-direction: column; gap: 2px; position:relative; z-index: 1; }
.about-tab-btn {
  width: 100px;
  padding: 14px 0;
  text-align: center;
  background: rgba(0,0,0,.4);
  color: #fff;
  cursor: pointer;
  font-size: 14px;
  transition: var(--transition);
  border: none;
}
.about-tab-btn.active,
.about-tab-btn:hover {
  background: var(--primary);
}
.about-tab-panel {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 340px;
  background-size: cover;
  background-position: center;
  z-index: -1;
  opacity: 0;
  transition: opacity .4s;
  display:none;
}
.about-tab-panel.active { opacity: 1; z-index: 0;display:block; }

/* ==================== 首页-快捷入口 ==================== */
.quick-links {
  text-align: center;
  padding: 50px 0;
}
.quick-link-item {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 180px;
  height: 150px;
  text-decoration: none;
  color: var(--text);
  box-shadow: 0 2px 12px rgba(0,0,0,.06);
  border-radius: var(--radius);
  transition: var(--transition);
  margin: 6px;
  background: #fff;
}
.quick-link-item:nth-child(even) { background: var(--bg-light); }
.quick-link-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(0,0,0,.1);
  color: var(--primary);
}
.quick-link-icon {
  width: 56px;
  height: 56px;
  margin-bottom: 10px;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
}
.quick-link-label { font-size: 14px; font-weight: 500; }

/* ==================== 首页-服务范围 ==================== */
.service-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  cursor: pointer;
}
.service-card img {
  width: 100%;
  height: 375px;
  object-fit: cover;
  display: block;
  transition: transform .6s;
}
.service-card:hover img { transform: scale(1.05); }
.service-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid rgba(255,255,255,.3);
  pointer-events: none;
  transition: var(--transition);
}
.service-card:hover::after { border-color: var(--accent); }
.service-card-info {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: rgba(240,240,240,.85);
  padding: 0 20px;
  transition: all .5s ease;
  overflow: hidden;
}
.service-card-title {
  font-size: 16px;
  font-weight: 700;
  text-align: center;
  padding: 18px 0;
  color: var(--text);
  position: relative;
  transition: var(--transition);
}
.service-card-title::after {
  content: '';
  position: absolute;
  width: 30px;
  height: 1px;
  background: var(--text-light);
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
}
.service-card-desc {
  padding: 0 10px 15px;
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  max-height: 0;
  opacity: 0;
  transition: all .5s ease;
}
.service-card:hover .service-card-info {
  background: rgba(0,97,174,.85);
  /*top: 45%;*/
}
.service-card:hover .service-card-title {
  color: #fff;
  padding-bottom: 8px;
}
.service-card:hover .service-card-title::after { background: rgba(255,255,255,.5); }
.service-card:hover .service-card-desc {
  max-height: 500px;
  opacity: 1;
  color: rgba(255,255,255,.9);
}

/* ==================== 二级页-多列单图列表 ==================== */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  padding-bottom: 60px;
}
.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  aspect-ratio: 4/3;
  cursor: pointer;
  background: var(--bg-light);
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s;
}
.gallery-item:hover img { transform: scale(1.08); }
.gallery-item-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,100,173,0);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.gallery-item-overlay i {
  color: #fff;
  font-size: 28px;
  opacity: 0;
  transform: scale(.6);
  transition: var(--transition);
}
.gallery-item:hover .gallery-item-overlay { background: rgba(0,100,173,.45); }
.gallery-item:hover .gallery-item-overlay i { opacity: 1; transform: scale(1); }

/* ==================== 二级页-多列单图加标题列表 ==================== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding-bottom: 60px;
}
.card-item {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0,0,0,.06);
  transition: var(--transition);
}
.card-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0,0,0,.12);
}
.card-item-img {
  aspect-ratio: 16/10;
  overflow: hidden;
  background: var(--bg-light);
}
.card-item-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s;
}
.card-item:hover .card-item-img img { transform: scale(1.06); }
.card-item-body { padding: 16px; }
.card-item-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.5;
}
.card-item-title:hover { color: var(--primary); }
.card-item-meta {
  font-size: 12px;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 12px;
}
.card-item-meta i { margin-right: 3px; }

/* ==================== 二级页-单行图文列表 ==================== */
.article-list { padding-bottom: 60px; }
.article-item {
  display: flex;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid #eee;
  transition: var(--transition);
}
.article-item:hover { background: var(--bg-light); margin: 0 -20px; padding: 24px 20px; border-radius: var(--radius); }
.article-item-img {
  flex-shrink: 0;
  width: 240px;
  aspect-ratio: 16/10;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--bg-light);
}
.article-item-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s;
}
.article-item:hover .article-item-img img { transform: scale(1.05); }
.article-item-body { flex: 1; display: flex; flex-direction: column; justify-content: center; }
.article-item-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
  transition: var(--transition);
}
.article-item:hover .article-item-title { color: var(--primary); }
.article-item-summary {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 10px;
}
.article-item-meta {
  font-size: 12px;
  color: var(--text-light);
  display: flex;
  gap: 18px;
}
.article-item-meta i { margin-right: 4px; }

/* 分页 */
.pagination-custom { padding: 30px 0 60px; }
.pagination-custom .page-link {
  color: var(--text);
  border-color: #ddd;
  padding: 8px 14px;
  font-size: 14px;
  margin: 0 2px;
  border-radius: var(--radius) !important;
  transition: var(--transition);
}
.pagination-custom .page-link:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
.pagination-custom .page-item.active .page-link { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ==================== 专题页 ==================== */
.topic-hero {
  height: 360px;
  background: linear-gradient(135deg, var(--primary) 0%, #003d6b 100%);
  position: relative;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.topic-hero::before {
  content: '';
  position: absolute;
  right: -50px;
  top: -50px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(255,255,255,.04);
}
.topic-hero::after {
  content: '';
  position: absolute;
  right: 80px;
  bottom: -80px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(236,104,58,.08);
}
.topic-hero-content { position: relative; z-index: 1; color: #fff; }
.topic-hero-content h1 { font-size: 38px; font-weight: 700; margin-bottom: 12px; }
.topic-hero-content p { font-size: 16px; opacity: .85; max-width: 600px; line-height: 1.8; }
.topic-section { padding: 60px 0; }
.topic-section.alt-bg { background: var(--bg-light); }
.topic-text-block {
  font-size: 15px;
  line-height: 2;
  color: var(--text-muted);
  text-indent: 2em;
}
.topic-stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.topic-stat-item {
  text-align: center;
  padding: 30px 15px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: 0 2px 12px rgba(0,0,0,.05);
  transition: var(--transition);
}
.topic-stat-item:hover { transform: translateY(-4px); box-shadow: 0 8px 25px rgba(0,0,0,.1); }
.topic-stat-num {
  font-size: 36px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}
.topic-stat-num span { font-size: 14px; font-weight: 400; color: var(--text-muted); }
.topic-stat-label { font-size: 14px; color: var(--text-muted); margin-top: 6px; }
.topic-timeline { position: relative; padding-left: 30px; }
.topic-timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: #e0e0e0;
}
.topic-timeline-item { position: relative; margin-bottom: 30px; }
.topic-timeline-item::before {
  content: '';
  position: absolute;
  left: -26px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid #fff;
  box-shadow: 0 0 0 2px var(--primary);
}
.topic-timeline-year { font-size: 18px; font-weight: 700; color: var(--primary); margin-bottom: 4px; }
.topic-timeline-desc { font-size: 14px; color: var(--text-muted); line-height: 1.7; }

/* ==================== Footer ==================== */
.footer-main {
  background: var(--dark);
  color: #fff;
  padding: 50px 0 30px;
}
.footer-main h5 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}
.footer-main h5::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 30px;
  height: 2px;
  background: var(--accent);
}
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: 8px; }
.footer-links a { color: rgba(255,255,255,.65); font-size: 14px; }
.footer-links a:hover { color: #fff; padding-left: 4px; }
.footer-contact p { font-size: 13px; color: rgba(255,255,255,.65); margin-bottom: 6px; }
.footer-contact i { margin-right: 6px; color: var(--accent); width: 14px; text-align: center; }
.footer-qr { display: flex; gap: 15px; margin-top: 10px; }
.footer-qr-item {
  text-align: center;
  background: var(--dark-lighter);
  padding: 10px;
  border-radius: var(--radius);
}
.footer-qr-item img { width: 80px; height: 80px; display: block; }
.footer-qr-item span { font-size: 11px; color: rgba(255,255,255,.5); display: block; margin-top: 4px; }
.footer-login-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--dark-lighter);
  color: #fff;
  padding: 8px 16px;
  border-radius: var(--radius);
  font-size: 13px;
  transition: var(--transition);
}
.footer-login-btn:hover { background: var(--primary); color: #fff; }
.footer-bottom {
  background: var(--dark);
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 16px 0;
  font-size: 12px;
  color: var(--text-light);
}
.footer-bottom a { color: var(--text-light); }
.footer-bottom a:hover { color: #fff; }

/* 回到顶部 */
.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 80px;
  width: 42px;
  height: 42px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
  box-shadow: 0 4px 12px rgba(0,100,173,.3);
}
.back-to-top.show { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--accent); transform: translateY(-3px); }

/* ==================== Responsive ==================== */
@media (max-width: 1199.98px) {
  .gallery-grid { grid-template-columns: repeat(3, 1fr); }
  .card-grid { grid-template-columns: repeat(3, 1fr); }
  .topic-stat-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 991.98px) {
  .section-title { font-size: 24px; padding: 40px 0 30px; }
  .banner-section .swiper { height: 300px; }
  .banner-caption h2 { font-size: 26px; }
  .about-bg-left { width: 100%; height: 50%; }
  .about-section { padding: 30px 0;display: flex;flex-direction: column-reverse; }
  .about-tabs-wrap { width: 100%; margin-left: 0; margin-top: 20px; position:relative; }
  .about-tab-panel { height: 260px; position:relative; }
  .about-tab-nav { flex-direction: row; }
  .about-tab-btn { width: auto; flex: 1; }
  .quick-link-item { width: 140px; height: 120px; margin: 4px; }
  .quick-link-icon { width: 42px; height: 42px; }
  .service-card img { height: 260px; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .article-item-img { width: 200px; }
  .topic-hero { height: 280px; }
  .topic-hero-content h1 { font-size: 28px; }
  .main-nav .navbar-nav .nav-link { padding: 10px 15px; font-size: 14px; }
  .main-nav .dropdown-menu { border-radius: 0; }
  .top-actions { gap: 6px; }
  .top-btn { padding: 5px 10px; font-size: 12px; }
}

@media (max-width: 767.98px) {
  .top-bar { padding: 10px 0; }
  .logo-text-cn { font-size: 17px; }
  .logo-text-en { font-size: 10px; }
  .logo-area img { height: 40px; }
  .top-actions { display: none; }
  .main-nav .navbar-nav .nav-link { padding: 10px 0; text-align: left; border-bottom: 1px solid rgba(255,255,255,.08); }
  .main-nav .navbar-nav .nav-link::after { display: none; }
  .main-nav .dropdown-menu { background: rgba(255,255,255,.05); border: none; box-shadow: none; padding-left: 15px; }
  .main-nav .dropdown-item { color: rgba(255,255,255,.7); }
  .main-nav .dropdown-item:hover { background: none; color: #fff; }
  .banner-section .swiper { height: 220px; }
  .banner-caption { left: 5%; bottom: 30px; }
  .banner-caption h2 { font-size: 20px; }
  .banner-caption p { font-size: 13px; }
  .about-bg-left { height: auto; }
  .about-section { padding: 20px 0; }
  .about-content { color: var(--text); }
  .about-content .section-title { color: var(--text); }
  .about-content .section-title::after { background: var(--primary); }
  .about-content .section-title span { color: var(--text-light); }
  .about-tabs-wrap { margin-top: 15px; }
  .about-tab-panel { height: 200px; }
  .about-tab-btn { font-size: 12px; padding: 10px 0; }
  .quick-links { padding: 30px 0; }
  .quick-link-item { width: 105px; height: 95px; margin: 3px; }
  .quick-link-icon { width: 32px; height: 32px; margin-bottom: 6px; }
  .quick-link-label { font-size: 12px; }
  .service-card img { height: 200px; }
  .section-title { font-size: 20px; padding: 30px 0 20px; }
  .section-title span { font-size: 12px; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .card-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .card-item-body { padding: 10px; }
  .card-item-title { font-size: 13px; }
  .article-item { flex-direction: column; gap: 12px; padding: 15px 0; }
  .article-item:hover { margin: 0; padding: 15px 0; }
  .article-item-img { width: 100%; }
  .article-item-title { font-size: 15px; }
  .page-banner { height: 160px; }
  .page-banner h1 { font-size: 24px; }
  .topic-hero { height: 220px; }
  .topic-hero-content h1 { font-size: 22px; }
  .topic-hero-content p { font-size: 13px; }
  .topic-section { padding: 40px 0; }
  .topic-stat-num { font-size: 28px; }
  .footer-qr-item img { width: 65px; height: 65px; }
  .back-to-top { right: 15px; bottom: 60px; width: 36px; height: 36px; font-size: 15px; }
}

@media (max-width: 575.98px) {
  .gallery-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .card-grid { grid-template-columns: 1fr; gap: 16px; }
  .topic-stat-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .news-tabs .nav-pills .nav-link { margin-right: 15px; font-size: 13px; }
}


 /* ==================== 二级页子导航 ==================== */
.sub-nav { border-bottom: 1px solid #ddd; background: #fff; }
.sub-nav-inner { display: flex; align-items: center; padding: 0; }
.sub-nav-list { display: inline-flex; gap: 32px; align-items: center; padding: 16px 0; position: relative; }
.sub-nav-list a { padding: 6px 0; font-size: 14px; color: #333; transition: color 0.2s; position: relative; }
.sub-nav-list a:hover, .sub-nav-list a.active { color: #1992fd; }
.sub-nav-list a.active::after { content: ""; display: block; width: 100%; height: 3px; background: #1992fd; position: absolute; bottom: -16px; left: 0; }


/* ==================== 分页组件 ==================== */
.pagination-wrap { display: flex; justify-content: center; align-items: center; gap: 6px; padding: 32px 0; }
.pagination-wrap .page-item { display: inline-flex; align-items: center; justify-content: center; min-width: 36px; height: 36px; padding: 0 10px; border: 1px solid #ddd; border-radius: 4px; font-size: 14px; color: #333; transition: all 0.2s; cursor: pointer; }
.pagination-wrap .page-item:hover { border-color: #1992fd; color: #1992fd; }
.pagination-wrap .page-item.active { background: #1992fd; border-color: #1992fd; color: #fff; }
.pagination-wrap .page-ellipsis { min-width: 36px; height: 36px; display: inline-flex; align-items: center; justify-content: center; color: #999; }