/* =============================================
   居易国际官网 - 主样式
   设计规范：清新白色底，深蓝主色，简约大气
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;500;600;700&family=Noto+Sans+SC:wght@300;400;500;600&display=swap');

/* ---------- CSS 变量 ---------- */
:root {
  --primary:      #1B3A6B;   /* 深蓝主色 */
  --primary-dk:   #122A52;   /* 深蓝深色 */
  --primary-lt:   #E8EEF8;   /* 浅蓝背景 */
  --primary-mid:  #2E5CA8;   /* 中蓝高亮 */
  --accent:       #C9A84C;   /* 金色点缀 */
  --accent-lt:    #FBF4E0;
  --bg:           #FFFFFF;
  --bg-light:     #F7F8FA;
  --bg-section:   #F2F4F8;
  --text:         #1A1F2E;
  --text-body:    #3D4460;
  --text-muted:   #7B82A0;
  --border:       #E2E6EF;
  --border-lt:    #EEF0F6;
  --white:        #FFFFFF;
  --shadow-xs:    0 1px 4px rgba(27,58,107,.06);
  --shadow-sm:    0 2px 12px rgba(27,58,107,.08);
  --shadow-md:    0 8px 32px rgba(27,58,107,.12);
  --shadow-lg:    0 20px 60px rgba(27,58,107,.15);
  --radius:       4px;
  --radius-md:    8px;
  --radius-lg:    12px;
  --transition:   0.28s ease;
  --nav-h:        72px;
  --font-serif:   'Noto Serif SC', 'SimSun', serif;
  --font-sans:    'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

/* ---------- 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; }

/* ---------- 通用容器 ---------- */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 32px;
}
.section { padding: 88px 0; }
.bg-light { background: var(--bg-light); }
.bg-section { background: var(--bg-section); }

/* ---------- 通用标题 ---------- */
.section-header { text-align: center; margin-bottom: 60px; }
.section-header.left { text-align: left; }

.section-tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.32em;
  color: var(--primary-mid);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 14px;
  padding: 4px 12px;
  background: var(--primary-lt);
  border-radius: 2px;
}
.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 2.8vw, 2.4rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
  line-height: 1.3;
}
.section-sub {
  color: var(--text-muted);
  font-size: 15px;
  max-width: 560px;
  margin: 0 auto;
}
.section-header.left .section-sub { margin: 0; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 32px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: var(--white);
  border: 2px solid var(--primary);
}
.btn-primary:hover {
  background: var(--primary-mid);
  border-color: var(--primary-mid);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(27,58,107,.25);
}
.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,.75);
}
.btn-outline:hover {
  background: rgba(255,255,255,.12);
  border-color: var(--white);
}
.btn-outline-dark {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-outline-dark:hover {
  background: var(--primary);
  color: var(--white);
}
.btn-sm { padding: 9px 22px; font-size: 13px; }
.btn-full { width: 100%; justify-content: center; }


/* =============================================
   顶部导航栏
   ============================================= */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  transition: background var(--transition), box-shadow var(--transition);
  background: transparent;
}
.navbar.scrolled {
  background: rgba(255,255,255,.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
}
.nav-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h);
}

/* Logo */
.logo {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  flex-shrink: 0;
}
.logo-cn {
  font-family: var(--font-serif);
  font-size: 21px;
  font-weight: 700;
  color: var(--white);
  transition: color var(--transition);
}
.logo-en {
  font-size: 9.5px;
  letter-spacing: 0.28em;
  color: rgba(255,255,255,.65);
  font-weight: 400;
  transition: color var(--transition);
}
.navbar.scrolled .logo-cn { color: var(--primary); }
.navbar.scrolled .logo-en { color: var(--text-muted); }
/* 非hero页面（有page-banner），logo 始终显示深色 */
.navbar.no-hero .logo-cn { color: var(--primary); }
.navbar.no-hero .logo-en { color: var(--text-muted); }

/* 主导航 */
.nav-links {
  display: flex;
  align-items: center;
  gap: 0;
}

/* 一级菜单项（含下拉） */
.nav-item {
  position: relative;
}
.nav-item > a,
.nav-item > .nav-top-link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 18px;
  height: var(--nav-h);
  font-size: 14px;
  font-weight: 400;
  color: rgba(255,255,255,.88);
  letter-spacing: 0.04em;
  transition: color var(--transition);
  position: relative;
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
}
.nav-item > a::after,
.nav-item > .nav-top-link::after {
  content: '';
  position: absolute;
  bottom: 0; left: 18px; right: 18px;
  height: 2px;
  background: var(--white);
  transform: scaleX(0);
  transition: transform var(--transition);
  transform-origin: left;
}
.nav-item:hover > a::after,
.nav-item:hover > .nav-top-link::after,
.nav-item > a.active::after,
.nav-item > .nav-top-link.active::after { transform: scaleX(1); }
.nav-item:hover > a,
.nav-item:hover > .nav-top-link,
.nav-item > a.active,
.nav-item > .nav-top-link.active { color: var(--white); }

.navbar.scrolled .nav-item > a,
.navbar.scrolled .nav-item > .nav-top-link,
.navbar.no-hero .nav-item > a,
.navbar.no-hero .nav-item > .nav-top-link { color: var(--text-body); }
.navbar.scrolled .nav-item > a::after,
.navbar.scrolled .nav-item > .nav-top-link::after,
.navbar.no-hero .nav-item > a::after,
.navbar.no-hero .nav-item > .nav-top-link::after { background: var(--primary); }
.navbar.scrolled .nav-item:hover > a,
.navbar.scrolled .nav-item:hover > .nav-top-link,
.navbar.scrolled .nav-item > a.active,
.navbar.scrolled .nav-item > .nav-top-link.active,
.navbar.no-hero .nav-item:hover > a,
.navbar.no-hero .nav-item:hover > .nav-top-link,
.navbar.no-hero .nav-item > a.active,
.navbar.no-hero .nav-item > .nav-top-link.active { color: var(--primary); }

/* 下拉箭头 */
.nav-arrow {
  width: 14px; height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform var(--transition);
  flex-shrink: 0;
}
.nav-item:hover .nav-arrow { transform: rotate(180deg); }

/* ── 一级下拉面板 ── */
.dropdown {
  display: none;
  position: absolute;
  top: calc(var(--nav-h) - 2px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-lt);
  min-width: 160px;
  overflow: hidden;
  z-index: 200;
}
.nav-item:hover .dropdown { display: block; }

.dropdown-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 11px 18px;
  font-size: 13.5px;
  color: var(--text-body);
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
  position: relative;
  cursor: pointer;
}
.dropdown-item:hover { background: var(--bg-light); color: var(--primary); }
.dropdown-item.has-sub::after {
  content: '';
  width: 5px; height: 5px;
  border-right: 1.5px solid currentColor;
  border-top: 1.5px solid currentColor;
  transform: rotate(45deg);
  margin-left: 10px;
  flex-shrink: 0;
}

/* ── 二级下拉面板 ── */
.subdropdown {
  display: none;
  position: absolute;
  top: 0;
  left: calc(100% + 2px);
  background: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-lt);
  min-width: 140px;
  overflow: hidden;
  z-index: 300;
}
.dropdown-item:hover .subdropdown { display: block; }

.subdropdown-item {
  display: block;
  padding: 10px 18px;
  font-size: 13px;
  color: var(--text-body);
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}
.subdropdown-item:hover { background: var(--bg-light); color: var(--primary); }

/* 汉堡菜单（移动端） */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
}
.nav-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all var(--transition);
}
.navbar.scrolled .nav-toggle span,
.navbar.no-hero .nav-toggle span { background: var(--text); }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }


/* =============================================
   移动端导航抽屉
   ============================================= */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  background: var(--white);
  box-shadow: var(--shadow-md);
  z-index: 999;
  overflow-y: auto;
  max-height: calc(100vh - var(--nav-h));
}
.mobile-nav.open { display: block; }
.mobile-nav-item { border-bottom: 1px solid var(--border-lt); }
.mobile-nav-item > a,
.mobile-nav-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  font-size: 15px;
  color: var(--text);
  cursor: pointer;
}
.mobile-nav-item > a:hover,
.mobile-nav-top:hover { color: var(--primary); }
.mobile-nav-arrow {
  width: 16px; height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  transition: transform var(--transition);
}
.mobile-nav-item.open .mobile-nav-arrow { transform: rotate(180deg); }

.mobile-sub {
  display: none;
  background: var(--bg-light);
}
.mobile-nav-item.open .mobile-sub { display: block; }
.mobile-sub-group { padding: 0; }
.mobile-sub-group-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 11px 24px 11px 36px;
  font-size: 14px;
  color: var(--text-body);
  font-weight: 500;
  cursor: pointer;
  border-top: 1px solid var(--border-lt);
}
.mobile-sub-group-title:hover { color: var(--primary); }
.mobile-sub-group.open .mobile-nav-arrow { transform: rotate(180deg); }
.mobile-sub-children {
  display: none;
  background: var(--white);
}
.mobile-sub-group.open .mobile-sub-children { display: block; }
.mobile-sub-link {
  display: block;
  padding: 10px 24px 10px 52px;
  font-size: 13px;
  color: var(--text-muted);
  border-top: 1px solid var(--border-lt);
  transition: color var(--transition);
}
.mobile-sub-link:hover { color: var(--primary); }


/* =============================================
   Hero 区（首页大图）
   ============================================= */
.hero {
  position: relative;
  height: 100vh;
  min-height: 640px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(145deg, #0F2040 0%, #1B3A6B 45%, #1E4080 70%, #2E5CA8 100%);
}
.hero-img {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.25;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom,
    rgba(11,24,50,.2) 0%,
    rgba(11,24,50,.45) 60%,
    rgba(11,24,50,.7) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--white);
  padding: 0 24px;
  max-width: 820px;
}
.hero-tag {
  font-size: 12px;
  letter-spacing: 0.55em;
  color: rgba(255,255,255,.65);
  margin-bottom: 22px;
  font-family: var(--font-serif);
}
.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 5.5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 22px;
  text-shadow: 0 2px 24px rgba(0,0,0,.25);
}
.hero-desc {
  font-size: 15.5px;
  color: rgba(255,255,255,.78);
  margin-bottom: 44px;
  line-height: 1.9;
}
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.hero-scroll {
  position: absolute;
  bottom: 36px; left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,.45);
  font-size: 10.5px;
  letter-spacing: 0.22em;
}
.scroll-line {
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, rgba(255,255,255,.5), transparent);
  animation: scrollAnim 2s ease-in-out infinite;
}
@keyframes scrollAnim {
  0%, 100% { opacity: 1; transform: scaleY(1) translateY(0); }
  50% { opacity: 0.35; transform: scaleY(0.55) translateY(4px); }
}


/* =============================================
   页面 Banner（非首页顶部）
   ============================================= */
.page-banner {
  position: relative;
  height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-top: var(--nav-h);
}
.page-banner-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--primary-dk) 0%, var(--primary) 50%, var(--primary-mid) 100%);
  background-size: cover;
  background-position: center;
}
.page-banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(11,24,50,.82) 0%, rgba(11,24,50,.52) 100%);
}
.page-banner-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--white);
  padding: 0 24px;
}
.page-banner-content .section-tag {
  background: rgba(255,255,255,.15);
  color: rgba(255,255,255,.85);
  margin-bottom: 14px;
}
.page-banner-content h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.7rem, 3.5vw, 2.6rem);
  font-weight: 700;
  margin-bottom: 14px;
}
.breadcrumb {
  font-size: 13px;
  color: rgba(255,255,255,.5);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.breadcrumb a { color: rgba(255,255,255,.6); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--white); }
.breadcrumb-sep { opacity: 0.4; }


/* =============================================
   核心业务卡片
   ============================================= */
.biz-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.biz-card {
  padding: 40px 30px 32px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.biz-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: linear-gradient(to right, var(--primary), var(--primary-mid));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.biz-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-5px);
  border-color: transparent;
}
.biz-card:hover::before { transform: scaleX(1); }
.biz-icon {
  width: 54px; height: 54px;
  color: var(--primary);
  margin-bottom: 22px;
}
.biz-icon svg { width: 100%; height: 100%; }
.biz-card h3 {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text);
}
.biz-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 22px;
}
.card-link {
  font-size: 13px;
  color: var(--primary-mid);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition);
}
.card-link:hover { gap: 8px; }


/* =============================================
   关于简介（首页）
   ============================================= */
.about-brief-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.img-box {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, var(--primary-lt), #d4dff5);
}
.img-box img { width: 100%; height: 100%; object-fit: cover; }
.img-box-deco {
  position: absolute;
  bottom: -16px; right: -16px;
  width: 100px; height: 100px;
  border: 3px solid var(--primary);
  border-radius: var(--radius-lg);
  opacity: 0.15;
  pointer-events: none;
}
.about-lead {
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 16px;
  line-height: 1.75;
}
.about-body {
  color: var(--text-body);
  margin-bottom: 24px;
  font-size: 15px;
  line-height: 1.85;
}
.about-values { margin-bottom: 36px; }
.about-values li {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 14px;
  color: var(--text-body);
}
.value-dot {
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
}


/* =============================================
   数据亮点
   ============================================= */
.stats-section {
  background: linear-gradient(135deg, var(--primary-dk) 0%, var(--primary) 60%, var(--primary-mid) 100%);
  padding: 64px 0;
  position: relative;
  overflow: hidden;
}
.stats-section::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='0.03'%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");
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}
.stat-item {
  text-align: center;
  padding: 24px 16px;
  border-right: 1px solid rgba(255,255,255,.12);
}
.stat-item:last-child { border-right: none; }
.stat-num {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 3.8vw, 3.4rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1;
}
.stat-unit {
  font-size: 17px;
  color: rgba(255,255,255,.65);
}
.stat-label {
  font-size: 13px;
  color: rgba(255,255,255,.58);
  margin-top: 8px;
  letter-spacing: 0.1em;
}


/* =============================================
   新闻卡片（首页 + 新闻列表）
   ============================================= */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.news-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-lt);
  transition: all var(--transition);
}
.news-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: transparent;
}
.news-card.skeleton {
  height: 320px;
  background: linear-gradient(90deg, #f0f2f7 25%, #e6e9f2 50%, #f0f2f7 75%);
  background-size: 200% 100%;
  animation: skeleton 1.5s infinite;
}
@keyframes skeleton {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
.news-card-img {
  aspect-ratio: 16/9;
  background: var(--bg-section);
  overflow: hidden;
}
.news-card-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.45s ease;
}
.news-card:hover .news-card-img img { transform: scale(1.06); }
.news-card-body { padding: 20px 24px 26px; }
.news-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 12px;
  color: var(--text-muted);
}
.news-cat {
  background: var(--primary-lt);
  color: var(--primary);
  padding: 2px 8px;
  border-radius: 2px;
  font-size: 11px;
  font-weight: 500;
}
.news-cat.culture { background: #FBF4E0; color: #C9A84C; }
.news-cat.industry { background: #E8F5EC; color: #2D8A48; }
.news-card-body h3 {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
  line-height: 1.55;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-card-body p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.75;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-more { text-align: center; margin-top: 52px; }


/* =============================================
   页脚
   ============================================= */
.footer {
  background: #0D1B35;
  color: rgba(255,255,255,.6);
}
.footer-top {
  padding: 64px 0 48px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 2.2fr 1fr 1fr 1fr 1.4fr;
  gap: 44px;
}
.footer-brand .logo-cn {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--white);
  display: block;
  margin-bottom: 4px;
}
.footer-brand .logo-en {
  font-size: 9px;
  letter-spacing: 0.28em;
  color: rgba(255,255,255,.35);
  display: block;
  margin-bottom: 18px;
}
.footer-brand p { font-size: 13px; line-height: 1.85; }
.footer-col h4 {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--white);
  letter-spacing: 0.1em;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255,255,255,.08);
  text-transform: uppercase;
}
.footer-col a {
  display: block;
  font-size: 13px;
  color: rgba(255,255,255,.5);
  margin-bottom: 9px;
  transition: color var(--transition), padding-left var(--transition);
}
.footer-col a:hover { color: rgba(255,255,255,.9); padding-left: 4px; }
.footer-col p { font-size: 13px; margin-bottom: 8px; }
.footer-divider {
  border: none;
  border-top: 1px solid rgba(255,255,255,.07);
  margin: 0;
}
.footer-bottom {
  padding: 18px 32px;
  text-align: center;
  font-size: 12px;
  color: rgba(255,255,255,.28);
}
.footer-bottom a { color: rgba(255,255,255,.38); transition: color var(--transition); }
.footer-bottom a:hover { color: rgba(255,255,255,.7); }


/* =============================================
   关于我们页
   ============================================= */
.about-intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.about-intro-text p {
  color: var(--text-body);
  font-size: 15px;
  line-height: 1.85;
  margin-bottom: 16px;
}
.about-intro-text strong { color: var(--primary); font-weight: 600; }

.culture-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.culture-card {
  background: var(--white);
  padding: 38px 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-lt);
  text-align: center;
  transition: all var(--transition);
}
.culture-card:hover { box-shadow: var(--shadow-md); transform: translateY(-5px); border-color: transparent; }
.culture-icon {
  width: 56px; height: 56px;
  color: var(--primary);
  margin: 0 auto 20px;
}
.culture-icon svg { width: 100%; height: 100%; }
.culture-card h3 {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text);
}
.culture-card p { font-size: 14px; color: var(--text-muted); line-height: 1.75; }

/* 时间轴 */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding-left: 44px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 4px; top: 8px; bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary), var(--primary-lt));
}
.timeline-item {
  display: flex;
  gap: 36px;
  margin-bottom: 52px;
  position: relative;
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -47px; top: 10px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--primary);
  border: 3px solid var(--white);
  box-shadow: 0 0 0 2px var(--primary);
}
.timeline-year {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  color: var(--primary);
  min-width: 76px;
  line-height: 1.3;
}
.timeline-content h4 {
  font-size: 15.5px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}
.timeline-content p { font-size: 14px; color: var(--text-muted); line-height: 1.75; }

/* 荣誉资质 */
.honor-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
}
.honor-item {
  text-align: center;
  padding: 28px 14px;
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-lt);
  transition: all var(--transition);
}
.honor-item:hover { box-shadow: var(--shadow-sm); transform: translateY(-2px); }
.honor-badge {
  width: 44px; height: 44px;
  color: var(--accent);
  margin: 0 auto 12px;
}
.honor-badge svg { width: 100%; height: 100%; }
.honor-item p { font-size: 12px; color: var(--text-muted); line-height: 1.55; }


/* =============================================
   产品服务页
   ============================================= */
.service-tab-nav {
  position: sticky;
  top: var(--nav-h);
  z-index: 100;
  background: var(--white);
  border-bottom: 2px solid var(--border-lt);
  box-shadow: var(--shadow-xs);
}
.service-tab-nav .container {
  display: flex;
  gap: 0;
  overflow-x: auto;
}
.service-tab-btn {
  flex-shrink: 0;
  padding: 16px 30px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: all var(--transition);
  cursor: pointer;
  white-space: nowrap;
}
.service-tab-btn:hover { color: var(--primary); }
.service-tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }

.service-tab-panel { display: none; }
.service-tab-panel.active { display: block; }

.service-block { padding: 80px 0; }
.service-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
  margin-bottom: 64px;
}
.service-intro.reverse { direction: rtl; }
.service-intro.reverse > * { direction: ltr; }
.service-img-box {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, var(--primary-lt), #c8d8f0);
}
.service-img-box img { width: 100%; height: 100%; object-fit: cover; }

.service-num {
  font-family: var(--font-serif);
  font-size: 56px;
  font-weight: 700;
  color: var(--primary-lt);
  line-height: 1;
  margin-bottom: -8px;
  display: block;
}
.service-text h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}
.service-lead {
  font-size: 15.5px;
  color: var(--primary-mid);
  font-weight: 500;
  margin-bottom: 16px;
  line-height: 1.6;
}
.service-text p {
  color: var(--text-body);
  font-size: 14.5px;
  line-height: 1.85;
  margin-bottom: 16px;
}
.service-list { margin-bottom: 32px; }
.service-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 14px;
  color: var(--text-body);
}
.service-list li::before {
  content: '';
  width: 5px; height: 5px;
  background: var(--primary-mid);
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 8px;
}

/* 子项目卡片网格 */
.sub-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.sub-card {
  background: var(--white);
  border: 1px solid var(--border-lt);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  transition: all var(--transition);
}
.sub-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: transparent;
}
.sub-card-icon {
  width: 48px; height: 48px;
  background: var(--primary-lt);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  margin-bottom: 18px;
}
.sub-card-icon svg { width: 24px; height: 24px; }
.sub-card h4 {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text);
}
.sub-card p { font-size: 13.5px; color: var(--text-muted); line-height: 1.75; }


/* =============================================
   新闻页
   ============================================= */
.news-filter {
  display: flex;
  gap: 8px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.filter-btn {
  padding: 8px 22px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--white);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all var(--transition);
}
.filter-btn:hover { border-color: var(--primary); color: var(--primary); }
.filter-btn.active {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}
.news-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  min-height: 300px;
}
.loading-wrap {
  grid-column: 1/-1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 80px 0;
  color: var(--text-muted);
}
.loading-spinner {
  width: 36px; height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.85s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 52px;
}
.page-btn {
  min-width: 40px; height: 40px;
  padding: 0 12px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius);
  font-size: 14px;
  border: 1px solid var(--border);
  background: var(--white);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
}
.page-btn:hover { border-color: var(--primary); color: var(--primary); }
.page-btn.active { background: var(--primary); color: var(--white); border-color: var(--primary); }


/* =============================================
   联系我们页
   ============================================= */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 80px;
  align-items: start;
}
.contact-info-title,
.contact-form-title {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text);
}
.contact-intro {
  color: var(--text-muted);
  font-size: 14.5px;
  margin-bottom: 36px;
  line-height: 1.85;
}
.contact-items { display: flex; flex-direction: column; gap: 22px; }
.contact-item { display: flex; align-items: flex-start; gap: 16px; }
.contact-icon {
  width: 44px; height: 44px;
  background: var(--primary-lt);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary);
  flex-shrink: 0;
}
.contact-icon svg { width: 20px; height: 20px; }
.contact-item h4 { font-size: 12.5px; color: var(--text-muted); margin-bottom: 4px; }
.contact-item p { font-size: 15px; font-weight: 500; color: var(--text); }

.contact-form { display: flex; flex-direction: column; gap: 18px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 13px; font-weight: 500; color: var(--text); }
.required { color: #e04343; }
.form-group input,
.form-group select,
.form-group textarea {
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--text);
  background: var(--white);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary-mid);
  box-shadow: 0 0 0 3px rgba(46,92,168,.1);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-result { font-size: 13px; text-align: center; min-height: 20px; }
.form-result.success { color: #2D8A48; }
.form-result.error { color: #e04343; }


/* =============================================
   占位提示
   ============================================= */
.no-img-box { display: flex; align-items: center; justify-content: center; }
.no-img-box::after { content: '图片待上传'; font-size: 13px; color: var(--text-muted); }


/* =============================================
   响应式适配
   ============================================= */
@media (max-width: 1100px) {
  .footer-inner { grid-template-columns: 2fr 1fr 1fr; gap: 32px; }
  .footer-inner .footer-col:nth-child(4),
  .footer-inner .footer-col:nth-child(5) { grid-column: auto; }
  .honor-grid { grid-template-columns: repeat(4, 1fr); }
  .culture-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  :root { --nav-h: 64px; }
  .container { padding: 0 20px; }
  .section { padding: 64px 0; }
  .biz-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .about-brief-inner,
  .about-intro-grid,
  .service-intro { grid-template-columns: 1fr; gap: 40px; }
  .service-intro.reverse { direction: ltr; }
  .contact-layout { grid-template-columns: 1fr; gap: 48px; }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 28px; }
  .sub-cards { grid-template-columns: 1fr 1fr; }
  .news-grid,
  .news-list { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item { border-right: none; border-bottom: 1px solid rgba(255,255,255,.12); }
  .stat-item:nth-child(2n) { border-right: none; }
  .honor-grid { grid-template-columns: repeat(3, 1fr); }
  .page-banner { height: 220px; }

  /* 导航切换为移动端 */
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
}

@media (max-width: 600px) {
  .section { padding: 48px 0; }
  .biz-grid { grid-template-columns: 1fr; }
  .culture-grid { grid-template-columns: 1fr; }
  .sub-cards { grid-template-columns: 1fr; }
  .news-grid,
  .news-list { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .honor-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-btns { flex-direction: column; align-items: center; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .page-banner { height: 190px; }
  .timeline { padding-left: 28px; }
  .timeline-year { font-size: 20px; min-width: 60px; }
  .service-num { font-size: 40px; }
}

@media (max-width: 400px) {
  .container { padding: 0 16px; }
  .btn { padding: 11px 24px; font-size: 13px; }
}