:root {
  --bg-primary: #FFFFFF;
  /* 白色基调 */
  --bg-secondary: #F8FAFC;
  /* 极浅灰卡片背景，突显商务感 */
  --bg-glass: rgba(255, 255, 255, 0.85);
  /* 亮色玻璃态背景 */
  --text-primary: #1E293B;
  /* 深灰主文字 */
  --text-secondary: #475569;
  /* 中灰辅助性文字 */
  --accent-blue: #2563EB;
  /* 商务亮蓝 */
  --accent-cyan: #3B82F6;
  /* 偏明快的蓝，辅助渐变 */
  --border-color: rgba(15, 23, 42, 0.08);
  /* 浅灰边框 */

  --font-family: "Pingfang sc regular", "Source Han Sans CN", "Microsoft Yahei", "Noto Sans SC", "Microsoft YaHei Light", "Helvetica Neue", Helvetica, Tahoma, sans-serif;
}

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

html {
  font-family: var(--font-family);
  scroll-behavior: smooth;
  color: var(--text-primary);
  background-color: var(--bg-primary);
}

body {
  line-height: 1.6;
  overflow-x: hidden;
}

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

/* 导航栏 — 白色玻璃态 (粘性布局，占据空间) */
.header {
  position: sticky;
  top: 0;
  width: 100%;
  padding: 0.9rem 0;
  z-index: 1000;
  transition: background 0.4s ease, box-shadow 0.4s ease;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(37, 99, 235, 0.1);
  box-shadow: 0 2px 20px rgba(37, 99, 235, 0.06);
}

/* 顶部细线已移除 */
.header::before {
  display: none;
}

.header-container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: flex-start;
  gap: 4rem;
  align-items: center;
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.97);
  box-shadow: 0 4px 24px rgba(37, 99, 235, 0.08);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 1px;
}

.logo img {
  height: 40px;
  width: auto;
  border-radius: 4px;
}

.logo-text span {
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  gap: 2.8rem;
  list-style: none;
  margin-left: auto;
  align-items: center;
}

/* Mobile nav display utilities */
.show-on-mobile {
  display: none !important;
}

.nav-links>li>a {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: color 0.25s ease;
  position: relative;
  letter-spacing: 0.2px;
  padding: 4px 0;
}

.nav-links>li>a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #2563EB, #06b6d4);
  border-radius: 2px;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 0 6px rgba(59, 130, 246, 0.5);
}

.nav-links>li>a:hover,
.nav-links>li>a.active {
  color: var(--accent-blue);
}

.nav-links>li>a:hover::after,
.nav-links>li>a.active::after {
  width: 100%;
}

/* padding-bottom 与 margin-bottom 抵消，形成透明桥接区防止 hover 丢失 */
.nav-dropdown {
  position: relative;
  padding-bottom: 10px;
  margin-bottom: -10px;
}

/* 一级标签（不可点击） */
.nav-dropdown-label {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  cursor: default;
  user-select: none;
  transition: color 0.25s ease;
  position: relative;
  letter-spacing: 0.2px;
  padding: 4px 0;
}

.nav-dropdown:hover .nav-dropdown-label {
  color: var(--accent-blue);
}

/* 小箭头 */
.nav-dropdown-label svg {
  transition: transform 0.3s ease;
  flex-shrink: 0;
  stroke: var(--text-secondary);
}

.nav-dropdown:hover .nav-dropdown-label svg {
  transform: rotate(180deg);
  stroke: var(--accent-blue);
}

/* 下拉面板 — 简洁白色卡片 */
.nav-submenu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  white-space: nowrap;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 12px;
  padding: 0.5rem 0;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.1);
  list-style: none;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s ease, transform 0.22s ease;
  z-index: 1001;
  min-width: 148px;
  overflow: hidden;
}

.nav-submenu::before {
  display: none;
}

.nav-dropdown:hover .nav-submenu {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.nav-submenu li a {
  display: block;
  padding: 0.68rem 1.4rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: background 0.18s ease, color 0.18s ease;
  border-radius: 8px;
  margin: 0.1rem 0.35rem;
}

.nav-submenu li a:hover {
  background: rgba(37, 99, 235, 0.07);
  color: var(--accent-blue);
}

.nav-submenu li a::after,
.nav-submenu li a::before {
  display: none !important;
}

.nav-submenu li a.active {
  color: var(--accent-blue);
  background: rgba(37, 99, 235, 0.07);
}

/* 移动端修正 */
@media (max-width: 992px) {
  .nav-dropdown {
    padding-bottom: 0;
    margin-bottom: 0;
  }

  .nav-submenu {
    position: static;
    transform: none !important;
    opacity: 1;
    pointer-events: auto;
    box-shadow: none;
    border: none;
    background: transparent;
    backdrop-filter: none;
    padding: 0.3rem 0 0 1rem;
    border-radius: 0;
    display: none;
    min-width: unset;
    overflow: visible;
  }

  .nav-submenu::before {
    display: none;
  }

  .nav-dropdown.mobile-open .nav-submenu {
    display: block;
  }

  .nav-dropdown-label {
    cursor: pointer;
    color: var(--text-primary);
  }

  .nav-links>li>a {
    color: var(--text-primary);
  }

  .nav-submenu li a {
    color: var(--text-secondary);
  }
}

/* 通用 Hero 区域（动态伸缩海报） */
.hero-section {
  height: 70vh;
  /* 在 600-800 范围内根据屏幕高度自动伸缩 */
  min-height: 600px;
  max-height: 800px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  text-align: center;
  padding: 100px 20px;
  overflow: hidden;
  transition: all 0.3s ease;
  background: #0f172a url('images/hero-bg.jpg') center/cover no-repeat;
}

/* 深色半透明遮罩以确保白色文字可读 */
.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 23, 42, 0.55);
  z-index: 0;
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}

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

/* 滚动引导图标样式 */
.scroll-down-indicator {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: none; /* 默认隐藏 */
  animation: scroll-bounce 2s infinite;
  opacity: 0.8;
}

@keyframes scroll-bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-10px); }
  60% { transform: translateX(-50%) translateY(-5px); }
}

.hero-content h1 {
  font-size: 3.8rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  color: #FFFFFF;
}

.hero-content p {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.85);
  max-width: 800px;
  margin: 0 auto 2.5rem auto;
}

.hero-content .highlight {
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-content p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 800px;
  margin: 0 auto 2.5rem auto;
}

/* 通用按钮 */
.btn-primary {
  display: inline-block;
  padding: 0.875rem 2.5rem;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
  color: #fff !important;
  border-radius: 50px;
  font-weight: 600;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(37, 99, 235, 0.2);
}

.btn-outline {
  display: inline-block;
  padding: 0.875rem 2.5rem;
  background: transparent;
  color: var(--accent-blue) !important;
  border-radius: 50px;
  font-weight: 600;
  transition: all 0.3s ease;
  border: 1px solid var(--accent-blue);
  cursor: pointer;
}

.btn-outline:hover {
  background: rgba(37, 99, 235, 0.05);
  transform: translateY(-2px);
}

/* 通用内容区块 */
.section-wrapper {
  padding: 6rem 0;
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

/* 左右完全贯通的全屏区块 */
.full-width-section {
  width: 100vw;
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
  padding: 6rem 5%;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.section-subtitle {
  color: var(--accent-blue);
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-size: 0.9rem;
}

/* 玻璃态卡片通用样式 -> 纯净白卡片 */
.glass-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2.5rem;
  transition: transform 0.4s ease, box-shadow 0.4s ease, border-color 0.4s ease;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.02);
}

.glass-card:hover {
  transform: translateY(-5px);
  border-color: rgba(37, 99, 235, 0.3);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05);
}

.contact-map-card:hover {
  transform: none;
}

/* 网格布局通用 */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 3rem;
  align-items: center;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

/* 数字显示卡片增强 */
.stat-card {
  text-align: center;
  padding: 2.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.stat-number {
  display: inline-flex;
  align-items: flex-start;
  justify-content: center;
  font-size: 4rem;
  font-weight: 800;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.5rem;
  line-height: 1;
}

.stat-number .num-suffix {
  font-size: 1.5rem;
  font-weight: 600;
  margin-left: 0.2rem;
  margin-top: 0.4rem;
  -webkit-text-fill-color: var(--accent-blue);
}

.stat-label {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 1px;
}

/* 动画类 (通过 JS 触发) */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 响应式核心（移动端适配） */
@media (max-width: 992px) {
  .header-container {
    justify-content: space-between;
  }

  .hero-section {
    height: calc(100vh - 68px);
    height: calc(100dvh - 68px); /* 扣除顶部导航栏高度 (~68px) */
    min-height: unset;
    max-height: unset;
  }

  .scroll-down-indicator {
    display: block;
  }

  .hide-on-mobile {
    display: none !important;
  }

  .hero-content h1 {
    font-size: 2.8rem;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }

  .full-width-section {
    width: 100%;
    left: auto;
    right: auto;
    margin-left: 0;
    margin-right: 0;
    padding: 3.5rem 5% !important;
  }

  .section-wrapper,
  .content-section {
    width: 100%;
    padding: 3.5rem 1.125rem !important;
  }

  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .hide-on-mobile {
    display: none !important;
  }
  
  .show-on-mobile {
    display: block !important;
  }

  .nav-links {
    position: fixed;
    top: 60px;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 2rem 5%;
    gap: 1.5rem;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08);
    transform: translateY(-15px) scale(0.98);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.3s;
    border-bottom: 1px solid var(--border-color);
  }

  .nav-links.mobile-active {
    transform: translateY(0) scale(1);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .mobile-menu-btn {
    display: block !important;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--text-primary);
    background: none;
    border: none;
  }

  /* 移动端服务卡片优化：同行显示与缩小 */
  .bg-gray .grid-4 .glass-card {
    padding: 1rem !important;
    min-width: 0;
  }
  .bg-gray .grid-4 .glass-card .icon-anim {
    display: inline-block;
    vertical-align: middle;
    margin-bottom: 0 !important;
  }
  .bg-gray .grid-4 .glass-card .icon-anim svg {
    width: 22px;
    height: 22px;
  }
  .bg-gray .grid-4 .glass-card h3 {
    display: inline-block;
    vertical-align: middle;
    font-size: 1rem !important;
    margin-bottom: 0 !important;
    margin-left: 0.3rem;
  }
  .bg-gray .grid-4 .glass-card p {
    font-size: 0.75rem !important;
    margin-top: 0.5rem;
    margin-bottom: 0.5rem !important;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .bg-gray .grid-4 .glass-card span {
    font-size: 0.75rem !important;
  }

  /* 移动端优势数字卡片优化 */
  .stat-card {
    padding: 1.5rem 0.5rem !important;
    min-width: 0;
  }
  .stat-number {
    font-size: 2.2rem !important;
  }
  .stat-number .num-suffix {
    font-size: 0.9rem !important;
  }
  .stat-label {
    font-size: 0.75rem !important;
  }

  /* 移动端客户案例卡片优化：不裁切与缩小 */
  .grid-3 .glass-card {
    padding: 0.6rem !important;
    min-width: 0;
  }
  .grid-3 .glass-card > div:first-child {
    height: 5rem !important;
    margin-bottom: 0.5rem !important;
  }
  .grid-3 .glass-card img {
    object-fit: contain !important;
  }
  .grid-3 .glass-card h4 {
    font-size: 0.8rem !important;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    text-align: center;
  }
}

.mobile-menu-btn {
  display: none;
}

/* 占位图自适应与新加背景辅助类 */
.img-fluid {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  display: block;
}

.bg-white {
  background-color: #FFFFFF;
}

.bg-gray {
  background-color: #F8FAFC;
}

.section-wrapper.bg-gray {
  width: 100vw;
  max-width: none;
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
  padding-left: max(5%, calc((100vw - 1200px) / 2));
  padding-right: max(5%, calc((100vw - 1200px) / 2));
}

/* 动态悬浮图标微动效 */
.icon-anim {
  display: inline-block;
  animation: float-anim 3s ease-in-out infinite;
}

@keyframes float-anim {
  0% {
    transform: translateY(0);
  }

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

  100% {
    transform: translateY(0);
  }
}

/* 底部通用 - 浅灰主题 */
.footer {
  background-color: #F8FAFC;
  padding: 3rem 5%;
  text-align: center;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-color);
}

/* ==========================================================================
   子页面通用标题区 (Subpage Header - Premium Dark)
   ========================================================================== */
.subpage-header {
  height: 400px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 5%;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  position: relative;
  overflow: hidden;
}

/* 统一背景叠加层，支持通过 CSS 变量 --header-bg 定制底图 */
.subpage-header::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: var(--header-bg, url('images/hero-bg.jpg'));
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  opacity: 0.1;
  pointer-events: none;
  z-index: 0;
}

.subpage-header-content {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
}

.subpage-title {
  font-size: 2.8rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 1.5rem;
  line-height: 1.25;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.subpage-subtitle {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.85);
  max-width: 850px;
  margin: 0 auto;
  line-height: 1.8;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

@media (max-width: 768px) {
  .section-wrapper,
  .content-section,
  .full-width-section,
  .closing-section {
    padding-left: 1.125rem !important;
    padding-right: 1.125rem !important;
  }

  .section-header {
    margin-bottom: 2rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .section-subtitle {
    letter-spacing: 1px;
    line-height: 1.6;
  }

  .home-service-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
  }

  .home-service-grid .glass-card {
    padding: 1rem 1.1rem !important;
  }

  .subpage-header {
    height: 350px;
  }

  .subpage-title {
    font-size: 2.1rem;
  }

  .subpage-subtitle {
    font-size: 1rem;
    line-height: 1.6;
  }
}

/* ==========================================================================
   全站统一结尾区块 (Unified Closing Section - Soft Blue)
   ========================================================================== */
.closing-section {
  padding: 4.5rem 5%;
  text-align: center;
  background: linear-gradient(135deg, #dbeafe 0%, #fdfeff 100%);
  position: relative;
  overflow: hidden;
  border-top: 1px solid rgba(37, 99, 235, 0.1);
}

.closing-title {
  font-size: 2.3rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  color: #1e293b;
  line-height: 1.3;
}

.closing-text {
  max-width: 850px;
  margin: 0 auto 3.5rem auto;
  color: #475569;
  line-height: 1.9;
  font-size: 1.05rem;
}

/* 动态交互按钮 (Dynamic CTA Button) */
.btn-dynamic {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.2rem 3.5rem;
  background: var(--accent-blue);
  color: #fff !important;
  font-weight: 700;
  text-decoration: none;
  border-radius: 12px;
  font-size: 1.15rem;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  box-shadow: 0 10px 25px rgba(37, 99, 235, 0.2);
}

.btn-dynamic:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 35px rgba(37, 99, 235, 0.3);
  background: #1d4ed8;
}

.btn-dynamic .arrow {
  transition: transform 0.3s ease;
}

.btn-dynamic:hover .arrow {
  transform: translateX(5px);
}

@media (max-width: 768px) {
  .closing-section {
    padding: 3.5rem 5%;
  }

  .closing-title {
    font-size: 1.8rem;
  }

  .btn-dynamic {
    padding: 1rem 2.5rem;
    font-size: 1.05rem;
  }
}

/* ==========================================================================
   Subpage Layout & Components (about and service pages)
   ========================================================================== */
.content-section {
  padding: 6rem 0;
}

.bg-gray-light {
  background-color: var(--bg-secondary);
}

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

.split-layout {
  display: flex;
  align-items: center;
  gap: 5rem;
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

@media (max-width: 992px) {
  .split-layout {
    flex-direction: column !important;
    gap: 2rem;
  }

  .split-image {
    flex: 0 0 auto !important;
    width: 100% !important;
    display: flex;
    justify-content: center;
    margin-bottom: 1rem;
  }

  .split-image img {
    width: 220px !important; /* 移动端缩小图片尺寸 */
    height: auto !important;
  }
}

.split-image {
  flex: 0 0 300px;
  position: relative;
  width: 100%;
}

.split-image img {
  width: 300px;
  height: auto;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  object-fit: cover;
}

.split-text {
  flex: 1.1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.section-h2 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  line-height: 1.3;
}

.p-large {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

/* Sub-feature blocks */
.sub-feature {
  margin-top: 1.5rem;
  border-left: 3px solid var(--accent-blue);
  padding-left: 1.5rem;
}

.sub-feature h4 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.sub-feature p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Service article cards and detail pages */
.service-articles-section {
  border-top: 1px solid var(--border-color);
}

.article-card-grid {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1rem;
}

.article-card {
  display: flex;
  min-height: 230px;
  flex-direction: column;
  padding: 1.35rem;
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.05);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.article-card:hover {
  transform: translateY(-4px);
  border-color: rgba(37, 99, 235, 0.22);
  box-shadow: 0 18px 42px rgba(37, 99, 235, 0.12);
}

.article-card-service {
  color: var(--accent-blue);
  font-size: 0.82rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.article-card h3 {
  font-size: 1.08rem;
  line-height: 1.45;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.article-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.65;
}

.article-card-link {
  margin-top: auto;
  padding-top: 1rem;
  color: var(--accent-blue);
  font-size: 0.9rem;
  font-weight: 700;
}

.home-reading-section {
  border-top: 1px solid var(--border-color);
}

.home-reading-grid {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.home-reading-card {
  min-height: 220px;
}

/* ==========================================================================
   面包屑导航高级重构 (Premium Breadcrumb Navigation Redesign)
   ========================================================================== */
.breadcrumb-nav {
  width: 90%;
  max-width: 1200px;
  margin: 1.5rem auto 0;
  padding: 0;
  display: flex;
  align-items: center;
}

/* 紧接在面包屑后的主内容区块 top padding 优化，缩减过大空白 */
.breadcrumb-nav + .content-section,
.breadcrumb-nav + .section-wrapper {
  padding-top: 2.5rem !important;
}

.breadcrumb-nav + .article-wrapper {
  padding-top: 1.5rem !important;
}

/* 玻璃态底盒容器 */
.breadcrumb-container {
  display: inline-flex;
  align-items: center;
  flex-wrap: nowrap; /* 保持单行 */
  padding: 0.6rem 1.25rem;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: 100px; /* 超高圆角胶囊形态 */
  box-shadow: 0 4px 15px -3px rgba(15, 23, 42, 0.03), 
              0 2px 6px -2px rgba(15, 23, 42, 0.02);
  transition: all 0.3s ease;
  overflow-x: auto;
  white-space: nowrap;
  max-width: 100%;
  scrollbar-width: none; /* Firefox 隐藏滚动条 */
}

/* 隐藏 Webkit 浏览器的滚动条 */
.breadcrumb-container::-webkit-scrollbar {
  display: none;
}

/* 单个面包屑项容器 */
.breadcrumb-item-wrapper {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

/* 链接项 */
.breadcrumb-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  padding: 0.35rem 0.75rem;
  border-radius: 50px;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* 悬停高亮微动效 - Pill hover effect */
.breadcrumb-link:hover {
  color: var(--accent-blue);
  background: rgba(37, 99, 235, 0.06);
  transform: translateY(-1px);
}

/* 悬停时 Home 图标微弹 */
.breadcrumb-link:hover .breadcrumb-home-icon {
  transform: translateY(-1.5px) scale(1.05);
  color: var(--accent-blue);
}

/* 首页图标 */
.breadcrumb-home-icon {
  display: inline-flex;
  align-items: center;
  color: var(--text-secondary);
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* 文字标签 */
.breadcrumb-text {
  letter-spacing: 0.3px;
}

/* 分隔符 */
.breadcrumb-separator {
  display: inline-flex;
  align-items: center;
  color: rgba(71, 85, 105, 0.35); /* 柔和的中灰度 */
  margin: 0 0.15rem;
  user-select: none;
  flex-shrink: 0;
}

/* 当前页面项 */
.breadcrumb-current {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--text-primary);
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  pointer-events: none; /* 当前页不可点 */
  flex-shrink: 0;
}

.breadcrumb-current .breadcrumb-home-icon {
  color: var(--text-primary);
}

/* 窄屏或移动端特殊适配 */
@media (max-width: 768px) {
  .breadcrumb-nav {
    width: calc(100% - 2.25rem);
    margin: 1rem auto 0;
  }
  
  .breadcrumb-container {
    padding: 0.5rem 1rem;
    border-radius: 50px; /* 适当缩减 */
    /* 采用右侧淡出遮罩提示，配合 CSS mask */
    mask-image: linear-gradient(to right, #000 85%, transparent 100%);
    -webkit-mask-image: linear-gradient(to right, #000 85%, transparent 100%);
  }
  
  .breadcrumb-link, .breadcrumb-current {
    font-size: 0.82rem;
    padding: 0.3rem 0.6rem;
  }
  
  .breadcrumb-separator {
    margin: 0;
  }
}


.article-wrapper {
  padding: 2rem 5% 5.5rem;
  background:
    linear-gradient(180deg, rgba(248, 250, 252, 0.9) 0%, #fff 42%),
    var(--bg-primary);
}

.article-content {
  max-width: 980px;
  margin: 0 auto;
}

.article-content section + section {
  margin-top: 1.35rem;
}

.article-content h2 {
  font-size: 1.82rem;
  line-height: 1.35;
  margin-bottom: 1.1rem;
  color: var(--text-primary);
  letter-spacing: 0;
}

.article-content p {
  color: var(--text-secondary);
  font-size: 1.04rem;
  line-height: 1.95;
  margin-bottom: 1rem;
}

.article-lead {
  font-size: 1.18rem !important;
  color: var(--text-primary) !important;
  font-weight: 600;
  line-height: 1.9 !important;
}

.article-meta-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.article-meta-panel span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.08);
  color: var(--accent-blue);
  font-size: 0.9rem;
  font-weight: 700;
}

.article-summary-card {
  padding: 1.35rem 1.5rem;
  margin-bottom: 1.25rem;
  background: #fff;
  border: 1px solid rgba(37, 99, 235, 0.14);
  border-radius: 8px;
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.06);
}

.article-summary-card strong {
  display: block;
  margin-bottom: 0.45rem;
  color: var(--text-primary);
  font-size: 1rem;
}

.article-summary-card p {
  margin-bottom: 0;
}

.article-toc {
  position: sticky;
  top: 78px;
  z-index: 20;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding: 0.85rem;
  margin-bottom: 1.35rem;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.05);
}

.article-toc a {
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 700;
  transition: background 0.22s ease, color 0.22s ease;
}

.article-toc a:hover {
  background: rgba(37, 99, 235, 0.1);
  color: var(--accent-blue);
}

.article-section-card {
  padding: 2rem;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: 0 18px 44px rgba(15, 23, 42, 0.055);
}

.article-callout {
  margin: 1.4rem 0;
  padding: 1.25rem 1.35rem;
  border-left: 4px solid #0f766e;
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(20, 184, 166, 0.09), rgba(255, 255, 255, 0.95));
}

.article-callout-blue {
  border-left-color: var(--accent-blue);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(255, 255, 255, 0.96));
}

.article-callout strong,
.article-checklist h3,
.article-metrics h3 {
  display: block;
  margin-bottom: 0.55rem;
  color: var(--text-primary);
  font-size: 1.04rem;
}

.article-callout p {
  margin-bottom: 0;
}

.article-checklist {
  margin: 1.5rem 0;
  padding: 1.5rem;
  border-radius: 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
}

.article-checklist ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  list-style: none;
}

.article-checklist li {
  position: relative;
  padding-left: 1.45rem;
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 0.98rem;
}

.article-checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65rem;
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--accent-blue);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.article-insight-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.article-insight-grid div {
  padding: 1.2rem;
  border-radius: 8px;
  background: linear-gradient(180deg, #fff, var(--bg-secondary));
  border: 1px solid var(--border-color);
}

.article-insight-grid strong {
  display: block;
  margin-bottom: 0.45rem;
  color: var(--accent-blue);
  font-size: 1rem;
}

.article-insight-grid span {
  display: block;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.article-metrics {
  margin: 1.5rem 0;
}

.article-metrics div {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.article-metrics span {
  padding: 0.55rem 0.9rem;
  border-radius: 8px;
  background: rgba(37, 99, 235, 0.08);
  color: var(--accent-blue);
  font-size: 0.92rem;
  font-weight: 700;
}

.faq-list {
  display: grid;
  gap: 1rem;
}

.faq-item {
  padding: 1.25rem 1.35rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--bg-secondary);
}

.faq-item h3 {
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.faq-item p {
  font-size: 0.98rem;
  line-height: 1.75;
  margin-bottom: 0;
}

@media (max-width: 1100px) {
  .article-card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .home-reading-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .article-card-grid,
  .home-reading-grid {
    width: 100%;
  }

  .article-card-grid {
    grid-template-columns: 1fr;
  }

  .home-reading-grid,
  .service-articles-section .article-card-grid {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }

  .home-reading-section,
  .service-articles-section {
    padding-top: 2.25rem !important;
    padding-bottom: 2.25rem !important;
    border-top-color: rgba(15, 23, 42, 0.04);
  }

  .home-reading-section .section-header,
  .service-articles-section .section-header {
    margin-bottom: 0.8rem;
  }

  .home-reading-section .section-title,
  .service-articles-section .section-title {
    font-size: 1.35rem;
    margin-bottom: 0;
    color: var(--text-secondary);
  }

  .home-reading-section .section-subtitle,
  .service-articles-section .section-subtitle,
  .home-reading-card .article-card-service,
  .service-articles-section .article-card-service,
  .home-reading-card p,
  .service-articles-section .article-card p,
  .home-reading-card .article-card-link,
  .service-articles-section .article-card-link {
    display: none;
  }

  .home-reading-card,
  .service-articles-section .article-card {
    min-height: 0;
    padding: 0.55rem 0.75rem;
    background: rgba(255, 255, 255, 0.62);
    border-color: rgba(15, 23, 42, 0.05);
    box-shadow: none;
  }

  .home-reading-card h3,
  .service-articles-section .article-card h3 {
    margin-bottom: 0;
    overflow: hidden;
    font-size: 0.9rem;
    line-height: 1.45;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .article-content h2 {
    font-size: 1.45rem;
  }

  .article-content p {
    font-size: 0.98rem;
  }

  .article-section-card {
    padding: 1.35rem;
  }

  .article-toc {
    position: static;
  }

  .article-checklist ul,
  .article-insight-grid {
    grid-template-columns: 1fr;
  }
}

/* Reveal Animation */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active,
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Footer responsive classes */
.footer-content-wrapper {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(320px, 430px) minmax(360px, 460px);
  gap: clamp(2rem, 5vw, 5rem);
  justify-content: center;
  align-items: center;
}

.footer-map {
  width: 100%;
  height: 220px;
  border-radius: 14px;
  overflow: visible;
  position: relative;
  border: 0;
  box-shadow: none;
}

.footer-info {
  width: 100%;
  max-width: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

@media (max-width: 860px) {
  .footer-content-wrapper {
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
  }

  .footer-map {
    height: 200px;
  }
}

/* 针对手机竖屏模式的极窄屏幕额外优化字号 */
@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 1.9rem;
  }
  .hero-content p,
  .full-width-section p {
    font-size: 0.95rem !important;
  }
  .subpage-title {
    font-size: 1.6rem;
  }
  .subpage-subtitle {
    font-size: 0.95rem;
  }
  .section-title {
    font-size: 1.6rem;
  }
  .section-subtitle {
    font-size: 0.8rem;
  }
  .closing-title {
    font-size: 1.5rem;
  }
  .closing-text {
    font-size: 0.9rem;
  }
  .section-h2 {
    font-size: 1.4rem;
  }
  .p-large {
    font-size: 0.9rem;
  }
}