/* 基础样式 */
html, body { height: 100%; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", Arial, Helvetica, sans-serif;
  color: #333;
  line-height: 1.7;
  background: #ffffff;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container-wide { max-width: 1220px; margin: 0 auto; padding: 0 16px; }

/* 顶部导航 */
.site-header { position: fixed; left: 0; right: 0; top: 0; z-index: 1000; background: transparent; transition: background .3s ease, box-shadow .3s ease; }
.site-nav { display: flex; align-items: center; justify-content: space-between; padding: 18px 0; }
.site-logo { display: flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; }
.site-logo img { height: 40px; width: auto; display: block; object-fit: contain; filter: drop-shadow(0 2px 2px rgba(0,0,0,.25)); }
.site-header.scrolled { background: rgba(255,255,255,0.96); box-shadow: 0 6px 20px rgba(0,0,0,0.06); }
.site-header.scrolled .site-menu a { color: #111827; }
.site-header.scrolled .site-menu a:hover { color: #0b43c4; }
.site-header.scrolled .site-logo img { filter: drop-shadow(0 1px 1px rgba(0,0,0,.1)); }
/* 在锚点跳转时避免被固定导航栏遮挡 */
section { scroll-margin-top: 78px; }
.site-menu { display: flex; gap: 28px; }
.site-menu a { color: #fff; font-size: 15px; }
.site-menu a:hover { color: #00d4ff; }
/* 小屏隐藏顶部横向菜单，仅保留按钮 */
@media (max-width: 992px) { .site-menu { display: none; } }

/* 移动端菜单按钮 */
.menu-btn { display: none; width: 40px; height: 40px; border-radius: 10px; border: 1px solid rgba(255,255,255,.35); background: rgba(255,255,255,.12); backdrop-filter: blur(2px); align-items: center; justify-content: center; cursor: pointer; }
.menu-btn .bar, .menu-btn .bar::before, .menu-btn .bar::after { width: 18px; height: 2px; background: #ffffff; display: block; position: relative; transition: transform .3s ease, background .3s ease; }
.menu-btn .bar::before, .menu-btn .bar::after { content: ""; position: absolute; left: 0; }
.menu-btn .bar::before { top: -6px; }
.menu-btn .bar::after { top: 6px; }
.site-header.scrolled .menu-btn { background: #ffffff; border-color: rgba(17,24,39,.18); }
.site-header.scrolled .menu-btn .bar, .site-header.scrolled .menu-btn .bar::before, .site-header.scrolled .menu-btn .bar::after { background: #111827; }
@media (max-width: 992px) { .menu-btn { display: inline-flex; } }

/* 移动端全屏菜单 */
.mobile-menu { position: fixed; inset: 0; z-index: 2000; background: rgba(0,0,0,.25); opacity: 0; pointer-events: none; transition: opacity .28s ease; }
.mobile-menu.open { opacity: 1; pointer-events: auto; }
.mm-sheet { position: absolute; inset: 0; background: #f3f4f6; }
.mm-close { position: absolute; top: 14px; right: 14px; width: 40px; height: 40px; border-radius: 50%; border: 1px solid #d1d5db; background: #ffffff; color: #111827; font-size: 22px; line-height: 38px; text-align: center; cursor: pointer; box-shadow: 0 6px 18px rgba(0,0,0,.08); }
.mm-list { list-style: none; margin: 56px 0 0; padding: 0 16px; }
.mm-list li { border-bottom: 1px solid #e5e7eb; }
.mm-list a { display: flex; align-items: center; justify-content: space-between; padding: 16px 6px; color: #111827; font-weight: 700; text-decoration: none; }
.mm-list a:hover { color: #0b43c4; }
.mm-arrow { color: #9ca3af; font-size: 18px; }

/* 顶部横幅 */
.hero {
  position: relative;
  height: 100vh; /* 首屏全屏显示 */
  min-height: 520px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
/* 兼容移动端地址栏收缩后的可视高度 */
@supports (height: 100svh) { .hero { height: 100svh; } }

/* 轮播容器 */
.hero-slider {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

/* 轮播幻灯片 */
.hero-slide {
  position: absolute;
  inset: 0;
  background: center/cover no-repeat;
  opacity: 0;
  transition: opacity 0.8s ease-in-out;
  display: flex;
  align-items: center;
}

.hero-slide.active {
  opacity: 1;
}

.hero-slide .dots { /* 细点阵纹理 */
  position: absolute; 
  inset: 0; 
  background-image: radial-gradient(rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 18px 18px; 
  mix-blend-mode: overlay; 
  opacity: .6;
}

.hero-inner { 
  position: relative; 
  z-index: 1; 
  color: #fff; 
  text-align: center; 
  width: 100%; 
}

.hero-title { font-size: 40px; font-weight: 700; letter-spacing: 2px; }
.hero-sub { margin-top: 14px; font-size: 16px; opacity: .9; }
.hero-cta { margin-top: 28px; }

/* 轮播指示器 */
.hero-indicators {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 10;
}

.hero-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.5);
  background: transparent;
  cursor: pointer;
  transition: all 0.3s ease;
}

.hero-indicator:hover {
  border-color: rgba(255, 255, 255, 0.8);
  background: rgba(255, 255, 255, 0.3);
}

.hero-indicator.active {
  border-color: #fff;
  background: #fff;
}

/* 轮播控制按钮 */
.hero-control {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  border: none;
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  font-size: 24px;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 10;
  backdrop-filter: blur(10px);
}

.hero-control:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-50%) scale(1.1);
}

.hero-prev {
  left: 30px;
}

.hero-next {
  right: 30px;
}

/* 响应式调整 */
@media (max-width: 768px) {
  .hero-control {
    width: 40px;
    height: 40px;
    font-size: 20px;
  }
  
  .hero-prev {
    left: 20px;
  }
  
  .hero-next {
    right: 20px;
  }
  
  .hero-indicators {
    bottom: 20px;
  }
  
  .hero-title {
    font-size: 32px;
  }
}

/* 手机端特殊处理 */
@media (max-width: 576px) {
  .hero {
    height: auto;
    min-height: auto;
  }
  
  .hero-slider {
    height: auto;
    position: relative;
  }
  
  .hero-slide {
    position: relative;
    height: auto;
    min-height: 300px;
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    background-color: #f5f5f5;
  }
  
  /* 手机端隐藏轮播文字内容 */
  .hero-inner {
    display: none;
  }
  
  /* 手机端轮播控制按钮调整 */
  .hero-control {
    width: 36px;
    height: 36px;
    font-size: 18px;
  }
  
  .hero-prev {
    left: 15px;
  }
  
  .hero-next {
    right: 15px;
  }
  
  /* 手机端指示器调整 */
  .hero-indicators {
    bottom: 15px;
    gap: 8px;
  }
  
  .hero-indicator {
    width: 10px;
    height: 10px;
  }
}

/* 超小屏幕手机优化 */
@media (max-width: 375px) {
  .hero-slide {
    min-height: 250px;
  }
  
  .hero-control {
    width: 32px;
    height: 32px;
    font-size: 16px;
  }
  
  .hero-prev {
    left: 10px;
  }
  
  .hero-next {
    right: 10px;
  }
  
  .hero-indicators {
    bottom: 10px;
  }
}

.btn-primary-ghost { 
  display: inline-block; 
  padding: 10px 24px; 
  border-radius: 24px; 
  border: 1px solid #fff; 
  color: #fff; 
  transition: all 0.3s ease;
}

.btn-primary-ghost:hover { 
  background: #00a8ff; 
  border-color: #00a8ff; 
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 168, 255, 0.3);
}

/* 标题组件 */
.section { padding: 72px 0; }
.section-title { text-align: center; margin-bottom: 44px; }
.section-title h3 { font-size: 22px; letter-spacing: 2px; font-weight: 700; }
.section-title .line { width: 88px; height: 2px; margin: 10px auto 0; background: linear-gradient(90deg,#007bff,#00d4ff); }
.muted { color: #6b7280; font-size: 14px; }

/* 产品中心 */
.products { background: #f7f9fc; }
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.product-card {
  background: #fff; border-radius: 12px; padding: 26px 18px; text-align: center; transition: all .3s ease;
  box-shadow: 0 8px 18px rgba(6,24,44,0.06);
}
.product-card:hover { transform: translateY(-4px); box-shadow: 0 12px 28px rgba(6,24,44,0.12); }
.product-icon { width: 92px; height: 92px; margin: 0 auto 14px; border-radius: 50%; overflow: hidden; background: #eef4ff; display: grid; place-items: center; }
.product-name { font-weight: 600; margin-top: 8px; }
.product-link { margin-top: 6px; display: inline-block; color: #007bff; font-size: 14px; }

/* 产品中心 - 新样式（按参考图） */
.products { background: #f5f8ff; }
.products .section-title h3 { font-size: 28px; color: #111827; }
.products .subtitle-en { margin-top: 8px; color: #6b7a99; font-weight: 600; font-size: 14px; display: inline-block; position: relative; padding: 0 18px; }
.products .subtitle-en::before,
.products .subtitle-en::after { content: ""; position: absolute; top: 50%; width: 90px; height: 2px; background: #cfd8ea; }
.products .subtitle-en::before { right: 100%; margin-right: 12px; }
.products .subtitle-en::after { left: 100%; margin-left: 12px; }

.product-tiles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; }
.p-item { background: #ffffff; border-radius: 12px; overflow: hidden; box-shadow: 0 8px 24px rgba(6,24,44,0.06); border: 1px solid #eef2fb; transition: box-shadow .3s ease, transform .3s ease; }
.p-item:hover { box-shadow: 0 16px 36px rgba(6,24,44,0.12); transform: translateY(-3px); }
.p-photo { background: transparent; display: grid; place-items: center; position: relative; padding: 0; aspect-ratio: 4 / 3; }
.p-photo img { width: 100%; height: 100%; object-fit: contain; transition: transform .35s ease; }
.p-item:hover .p-photo img { transform: translateY(-2px) scale(1.2); }
.p-photo::after { content: none; }
.p-caption { background: #fff; text-align: center; padding: 18px 12px 20px; border-top: none; }
.p-caption .name { font-weight: 800; color: #0b43c4; letter-spacing: 1px; }

/* 解决方案 */
.solution {
    position: relative;
    color: #fff;
    background: url(../images/beijin.jpg) center/cover no-repeat;
}
.solution::after { content: ""; position: absolute; inset: 0; background: rgba(1,12,30,0.6); }
.solution-inner { position: relative; z-index: 1; }
.solution-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; margin-top: 36px; }
/* Tile */
.solution-item {
  position: relative;
  min-height: 300px; /* 提高高度 */
  border-radius: 18px;
  text-align: center;
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(2px);
  box-shadow: 0 10px 26px rgba(0,0,0,.12) inset;
  overflow: hidden;
}
.solution-item:hover { background: rgba(255,255,255,0.10); }
/* Front (图标+标题) */
.sol-front, .sol-back {
  position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px; transition: all .35s ease;
}
.sol-front { transform: translateY(0); opacity: 1; }
.solution-item .s-icon { width: 72px; height: 72px; margin: 0 auto 10px; display: block; object-fit: contain; filter: drop-shadow(0 6px 16px rgba(0,0,0,.25)); }
.solution-item h6 { color: #fff; opacity: .96; font-weight: 600; letter-spacing: .5px; }
/* Back (文字描述) */
.sol-back {
  opacity: 0; transform: translateY(8px);
  padding: 18px 22px; color: #fff; line-height: 1.9; text-align: left;
  background: rgba(0,0,0,.35); border: 1px solid rgba(255,255,255,.08);
  border-radius: 16px; width: calc(100% - 24px); height: calc(100% - 24px); margin: 12px;
}
.sol-back p { margin: 0; }
.solution-item:hover .sol-front { opacity: 0; transform: translateY(-8px) scale(.98); }
.solution-item:hover .sol-back { opacity: 1; transform: translateY(0); }
.solution-item i { font-size: 22px; color: #00d4ff; }
.solution-item h6 { margin-top: 10px; font-weight: 600; }

/* 关于我们 */
.about-section { position: relative; background: url('../images/about bj.jpg') center/cover no-repeat; }
.about-section::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(255,255,255,.92) 0%, rgba(255,255,255,.96) 60%, rgba(255,255,255,.90) 100%); pointer-events: none; }
.about-card { position: relative; z-index: 1; background: transparent; border-radius: 0; padding: 0; box-shadow: none; }
.about-wrap { display: grid; grid-template-columns: 1.1fr .9fr; gap: 36px; align-items: center; }
.about-ellipses { display: flex; gap: 24px; justify-content: center; align-items: flex-end; }
.about-ellipses .oval:nth-child(2),
.about-ellipses .oval:nth-child(3) { display: none; }
.oval { border-radius: 48px; overflow: hidden; background: #eef2f7; flex: 0 0 auto; box-shadow: 0 24px 48px rgba(6,24,44,.12); position: relative; }
.oval img { width: 100%; height: 100%; object-fit: cover; }
.oval.sm { width: 600px; height: 450px; }
.oval.lg { width: 600px; height: 450px; }
.oval::after { content: ""; position: absolute; left: 50%; bottom: -16px; transform: translateX(-50%); width: 70%; height: 18px; background: radial-gradient(ellipse at center, rgba(0,0,0,.14) 0%, rgba(0,0,0,0) 70%); filter: blur(6px); opacity: .25; border-radius: 50%; }
.about-title h3 { font-size: 28px; font-weight: 800; letter-spacing: 2px; color: #1f2937; }
.btn-solid { display:inline-block; padding: 10px 20px; border-radius: 24px; background:#0b43c4; color:#fff; box-shadow: 0 8px 20px rgba(11,67,196,.25); }
.btn-solid:hover { background:#0936a0; color:#fff; }

/* 数据概览 */
.stats { background: linear-gradient(180deg, #0a2a88, #052a92); color: #fff; }
.stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; text-align: center; }
.stat { padding: 30px 10px; }
/* 统计图标 */
.stat .s-pic { width: 64px; height: 64px; margin: 0 auto 12px; object-fit: contain; display: block; transition: transform .28s ease, filter .28s ease; filter: drop-shadow(0 6px 14px rgba(0,0,0,.22)); }
.stat:hover .s-pic { transform: translateY(-6px) scale(1.06); filter: drop-shadow(0 10px 24px rgba(0,0,0,.35)); }
.stat .num { font-size: 26px; font-weight: 700; letter-spacing: 1px; }
.stat .label { opacity: .9; font-size: 13px; }

/* 新闻 */
.news { background: url('../images/news bj.jpg') center/cover no-repeat; }
.news-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; }
.news-card { background: #fff; border-radius: 14px; overflow: hidden; box-shadow: 0 12px 30px rgba(6,24,44,.10); transition: transform .28s ease, box-shadow .28s ease; }
.news-card:hover { transform: translateY(-6px); box-shadow: 0 18px 40px rgba(6,24,44,.16); }
/* 顶图充满卡片且更高 */
.news-card > img { display: block; width: 100%; height: 260px; object-fit: cover; }
.news-card .body { padding: 18px 18px 20px; }
.news-card h5 { font-size: 18px; margin: 8px 0 10px; font-weight: 800; color: #1f2937; }
.news-card .meta { color: #6b7280; font-size: 12px; }

/* 合作伙伴 */
.partners { padding: 56px 0; background: #f7f9fc; }
.partner-row { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; }
.partner { background: #fff; border-radius: 10px; height: 90px; display: grid; place-items: center; box-shadow: 0 8px 18px rgba(6,24,44,0.06); font-weight: 700; color: #2b2f36; }

/* 页脚 */
.site-footer { background: #0a1b3f; color: #c9d3ff; padding-top: 36px; }
.footer-top { display: grid; grid-template-columns: 1.2fr 1fr 1fr 1fr 1.5fr; gap: 22px; }
.footer-brand { color: #fff; font-weight: 700; font-size: 18px; display: flex; align-items: center; gap: 8px; }
.footer-links a { display: block; color: #c9d3ff; font-size: 14px; padding: 6px 0; }
.footer-links a:hover { color: #00d4ff; }
.footer-bottom { margin-top: 22px; padding: 14px 0; border-top: 1px solid rgba(255,255,255,0.1); text-align: center; font-size: 12px; color: #9fb0ff; }

/* 页脚联系信息 */
.footer-contact .contact-info { margin-top: 16px; }
.contact-item { display: flex; align-items: center; margin-bottom: 12px; }
.contact-item .muted { color: #c9d3ff; font-size: 13px; line-height: 1.4; }

/* 页脚销售区域 */
.footer-sales { text-align: left; }
.sales-phone { color: #fff; font-weight: 600; font-size: 16px; margin-bottom: 16px; }
.form-prompt { color: #c9d3ff; font-size: 13px; margin-bottom: 12px; }
.form-input-group { display: flex; gap: 8px; margin-bottom: 16px; }
.form-input { flex: 1; padding: 8px 12px; border: 1px solid rgba(255,255,255,0.2); border-radius: 6px; background: rgba(255,255,255,0.1); color: #fff; font-size: 13px; }
.form-input::placeholder { color: rgba(255,255,255,0.6); }
.form-submit { padding: 8px 16px; background: #007bff; color: #fff; border: none; border-radius: 6px; font-size: 13px; cursor: pointer; transition: background .2s ease; }
.form-submit:hover { background: #0056b3; }

/* 社交媒体图标 */
.social-icons { display: flex; gap: 12px; justify-content: flex-start; }
.social-icon { width: 36px; height: 36px; background: rgba(255,255,255,0.1); border-radius: 8px; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 16px; cursor: pointer; transition: background .2s ease; }
.social-icon:hover { background: rgba(255,255,255,0.2); }

/* 响应式 */
@media (max-width: 992px) {
  .product-grid, .solution-grid, .news-grid, .partner-row, .footer-top { grid-template-columns: repeat(2,1fr); }
  .about-wrap { grid-template-columns: 1fr; }
  .product-tiles { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 576px) {
  .product-grid, .solution-grid, .news-grid, .partner-row { grid-template-columns: 1fr; }
  /* 手机端轮播图整张显示且在同一区域切换 —— 整图显示（contain） */
  .hero {
    height: 56vh;
    min-height: 320px;
    overflow: hidden;
  }
  .hero-slider { 
    position: absolute;
    inset: 0;
    height: 100%;
    width: 100%;
  }
  .hero-slide { 
    position: absolute;
    inset: 0;
    background-size: contain;   /* 整张图片显示，不裁切 */
    background-position: center;
    background-repeat: no-repeat;
    background-color: transparent;
  }
  .hero-inner { display: none; }
  .hero .dots { display: none; }
  .product-tiles { grid-template-columns: 1fr; gap: 16px; }
  /* 产品卡片：移动端视觉优化 */
  /* 与 PC 风格一致的单个产品卡片样式 */
  .products .container-wide { padding-left: 16px; padding-right: 16px; }
  .p-item { border-radius: 12px; padding: 0; background: #ffffff; border: 1px solid #eef2fb; box-shadow: 0 8px 24px rgba(6,24,44,0.06); }
  .p-photo { aspect-ratio: 4 / 3; padding: 0; height: auto; display: grid; place-items: center; }
  .p-photo img { width: 100%; height: 100%; object-fit: contain; }
  .p-caption { padding: 16px 12px 18px; background: #ffffff; border-top: none; }
  .p-caption .name { font-size: 16px; }
  /* 手机端隐藏关于我们右侧图片，仅展示介绍 */
  .about-ellipses { display: none; }
  .about-wrap { gap: 16px; }
  /* 关于我们：移动端左右 16px 内边距与排版微调 */
  #about .container-wide { padding-left: 16px; padding-right: 16px; }
  .about-title h3 { font-size: 24px; }
  .about-section .muted { font-size: 14px; line-height: 1.9; }
  /* 手机端隐藏数据概览区块 */
  .stats { display: none; }
}

/* 响应式页脚 */
@media (max-width: 992px) {
  .footer-top { grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .footer-contact { grid-column: span 3; }
  .footer-sales { grid-column: span 3; text-align: left; }
  .social-icons { justify-content: flex-start; }
}
@media (max-width: 576px) {
  .footer-top { grid-template-columns: repeat(3, 1fr); gap: 12px; }
  .footer-contact { grid-column: span 3; }
  .footer-sales { grid-column: span 3; text-align: left; }
  .social-icons { justify-content: flex-start; }
  
  /* 手机端菜单项样式优化 */
  .footer-links .footer-brand { font-size: 12px; margin-bottom: 8px; }
  .footer-links a { font-size: 11px; padding: 4px 0; }
  .footer-sales .sales-phone { font-size: 14px; margin-bottom: 12px; }
  .footer-sales .form-prompt { font-size: 11px; margin-bottom: 8px; }
  .footer-sales .form-input { font-size: 11px; padding: 6px 8px; }
  .footer-sales .form-submit { font-size: 11px; padding: 6px 12px; }
  .footer-sales .social-icon { width: 28px; height: 28px; font-size: 12px; }
}

/* 案例展示区 */
.cases { 
  background: url('../images/beijin.jpg') center/cover no-repeat; 
  position: relative; 
  color: #fff; 
}

.cases::before { 
  content: ""; 
  position: absolute; 
  inset: 0; 
  background: rgba(1,12,30,0.7); 
  pointer-events: none; 
}

.cases .container-wide { 
  position: relative; 
  z-index: 1; 
}

.cases .section-title h3 { 
  font-size: 28px; 
  color: #fff; 
}

.cases .muted { 
  margin-top: 8px; 
  color: #e2e8f0; 
  font-size: 14px; 
}

.cases-grid { 
  display: grid; 
  grid-template-columns: repeat(3, 1fr); 
  gap: 24px; 
  margin-top: 36px; 
}

.case-item { 
  background: #fff; 
  border-radius: 16px; 
  overflow: hidden; 
  box-shadow: 0 8px 24px rgba(6,24,44,0.08); 
  border: 1px solid #eef2fb; 
  transition: all .3s ease; 
  position: relative; 
}

.case-item:hover { 
  transform: translateY(-6px); 
  box-shadow: 0 16px 40px rgba(6,24,44,0.15); 
}

.case-image { 
  position: relative; 
  aspect-ratio: 4 / 3; 
  overflow: hidden; 
}

.case-image img { 
  width: 100%; 
  height: 100%; 
  object-fit: cover; 
  transition: transform .4s ease; 
}

.case-item:hover .case-image img { 
  transform: scale(1.08); 
}

.case-overlay { 
  position: absolute; 
  bottom: 0; 
  left: 0; 
  right: 0; 
  background: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.8) 100%); 
  color: #fff; 
  padding: 20px 16px 16px; 
  transform: translateY(100%); 
  transition: transform .3s ease; 
}

.case-item:hover .case-overlay { 
  transform: translateY(0); 
}

.case-title { 
  font-size: 16px; 
  font-weight: 700; 
  margin-bottom: 4px; 
  color: #fff; 
}

.case-desc { 
  font-size: 13px; 
  opacity: 0.9; 
  color: #e2e8f0; 
}

/* 响应式案例展示 */
@media (max-width: 992px) {
  .cases-grid { 
    grid-template-columns: repeat(2, 1fr); 
    gap: 20px; 
  }
}

@media (max-width: 576px) {
  .cases-grid { 
    grid-template-columns: 1fr; 
    gap: 16px; 
  }
  
  .case-item { 
    border-radius: 12px; 
  }
  
  .case-overlay { 
    padding: 16px 12px 12px; 
  }
  
  .case-title { 
    font-size: 15px; 
  }
  
  .case-desc { 
    font-size: 12px; 
  }
}