/* ============================================================
   三是科技 官网高级感视觉增强层 v2
   == 零内容改动 · 即插即用 ==
   ============================================================ */

/* ────────── 1. 全局字体渲染优化 ────────── */
body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* ────────── 2. 阴影体系升级 ────────── */
/* 仅增强 hover 状态，不改变默认阴影，避免样式冲突 */
.card {
  transition: transform 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              box-shadow 0.35s ease;
}
.card:hover {
  box-shadow:
    0 6px 20px rgba(10,22,40,0.07),
    0 0 0 1px rgba(37,99,235,0.15) !important;
  transform: translateY(-4px);
}

.partner-card {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.partner-card:hover {
  box-shadow: 0 6px 20px rgba(24,95,165,0.08), 0 0 0 1px rgba(37,99,235,0.15) !important;
}

.honor-card {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.honor-card:hover {
  box-shadow: 0 6px 24px rgba(24,95,165,0.1), 0 0 0 1px rgba(37,99,235,0.15) !important;
}

.product-card {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.equip-card {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* ────────── 3. 图片 hover 微动效 ────────── */
.card img,
.equip-card img,
.product-card-img {
  transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  will-change: transform;
}
.card:hover img,
.equip-card:hover img,
.product-card:hover .product-card-img {
  transform: scale(1.03);
}

/* 行业卡片图片 hover */
.industry-card img {
  transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  will-change: transform;
}
.industry-card:hover img {
  transform: scale(1.05);
}

/* 合作伙伴 logo hover */
.partner-logo-img {
  transition: transform 0.3s ease;
}
.partner-card:hover .partner-logo-img {
  transform: scale(1.05);
}

/* ────────── 4. 按钮 hover 微光效 ────────── */
/* 仅对 .btn-primary 增加光效（不影响 .btn-outline / .btn-white / .btn-gold / .btn-outline-white） */
.btn-primary {
  position: relative;
  overflow: hidden;
}
.btn-primary::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -80%;
  width: 50%;
  height: 200%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
  transform: rotate(20deg);
  transition: left 0.7s ease;
  pointer-events: none;
}
.btn-primary:hover::after {
  left: 130%;
}

/* ────────── 5. 焦点样式（键盘无障碍） ────────── */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--blue-500);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ────────── 6. 滚动条美化 ────────── */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: #94a3b8;
}

/* ────────── 7. 导航下拉菜单微毛玻璃 ────────── */
.nav-dropdown {
  background: rgba(255,255,255,0.98);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

/* ────────── 8. 导航栏滚动毛玻璃效果 ────────── */
/* JS 会动态添加 .navbar-enhanced 类，此处仅定义样式 */
#navbar.navbar-enhanced {
  background: #ffffff !important;
  box-shadow: 0 1px 3px rgba(0,0,0,0.03), 0 4px 16px rgba(0,0,0,0.05) !important;
  transition: box-shadow 0.3s ease;
}

/* ────────── 9. 返回顶部按钮精致化 ────────── */
#back-to-top {
  font-size: 0; /* 隐藏原有 ↑ 文本 */
  border: none;
  transition: transform 0.25s ease, box-shadow 0.25s ease, opacity 0.3s, visibility 0.3s;
}
#back-to-top svg {
  display: block;
}
#back-to-top:hover {
  transform: translateY(-3px) scale(1.05);
}

/* ────────── 10. 语言菜单 emoji 替换 ────────── */
#lang-dropdown button[data-lang] {
  display: flex;
  align-items: center;
  gap: 6px;
}
/* 隐藏 emoji 文本，用 SVG 地球图标替代 */
#lang-dropdown button[data-lang] {
  font-size: 0;
  line-height: 1.5;
}
#lang-dropdown button[data-lang] .lang-text {
  font-size: 0.85rem;
}
#lang-dropdown button[data-lang]::before {
  content: '';
  display: inline-block;
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2364748b' stroke-width='1.5'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M12 21a9.004 9.004 0 008.716-6.747M12 21a9.004 9.004 0 01-8.716-6.747M12 21c2.485 0 4.5-4.03 4.5-9S14.485 3 12 3m0 18c-2.485 0-4.5-4.03-4.5-9S9.515 3 12 3m0 0a8.997 8.997 0 017.843 4.582M12 3a8.997 8.997 0 00-7.843 4.582m15.686 0A11.953 11.953 0 0112 10.5c-2.998 0-5.74-1.1-7.843-2.918m15.686 0A8.959 8.959 0 0121 12c0 .778-.099 1.533-.284 2.253m0 0A17.919 17.919 0 0112 16.5c-3.162 0-6.133-.815-8.716-2.247m0 0A9.015 9.015 0 013 12c0-1.605.42-3.113 1.157-4.418'/%3E%3C/svg%3E") center/contain no-repeat;
  vertical-align: middle;
}

/* ────────── 11. 移动端菜单栏禁止背景滚动 ────────── */
body.menu-open {
  overflow: hidden;
}

/* ────────── 12. 响应式适配 ────────── */
@media (max-width: 768px) {
  .btn-primary::after {
    display: none;
  }
  ::-webkit-scrollbar {
    width: 3px;
    height: 3px;
  }
}