/* ============================================
   LIANYIXIN 全站基础框架 CSS
   深色工业科技风 + 白色内容区 + 橙红CTA
   Hero 单图重构 / 卡片统一 / 间距统一
   ============================================ */

/* ---------- CSS 变量（Phase 4 重构） ---------- */
:root {
  /* 主色：深蓝（替代原有纯黑） */
  --c-bg:       #0B1A2A;
  --c-bg-2:     #11263C;
  /* 卡片 */
  --c-bg-card:  #162F4A;
  /* 浅色区块（必须使用，打破全黑） */
  --c-bg-light: #F5F7FA;
  --c-white:    #ffffff;
  /* 文字 */
  --c-text:     #A8B3C7;
  --c-text-dim: #6B7280;
  --c-heading:  #FFFFFF;
  /* 浅色区块文字（用于 #F5F7FA 背景） */
  --c-text-dark:  #374151;
  --c-heading-dark: #111827;
  /* CTA / 强调 */
  --c-accent:   #FF6A00;
  --c-accent-h: #FF8533;
  --c-border:   #1E3A5F;
  --c-border-l: #E5E7EB;
  --c-cyan:     #00E5FF;
  --f-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  /* UI统一系统 */
  --s-section:  80px;           /* 模块上下间距 */
  --s-container: 1280px;        /* 最大宽度 */
  --s-container-padding: 40px;  /* 左右边距 */
  --s-gap: 24px;                /* 卡片间距 */
  --r-sm: 8px;                  /* 小圆角 */
  --r-md: 8px;                  /* 中圆角（统一8px） */
  --r-lg: 8px;                  /* 大圆角（统一8px） */
  /* 字体系统 */
  --fs-h1: 48px;
  --fs-h2: 36px;
  --fs-h3: 24px;
  --fs-body: 16px;
  --fs-small: 14px;
  /* 按钮统一 */
  --btn-height: 44px;
  --btn-radius: 8px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--f-sans);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.6;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; border: none; background: none; }

/* ---------- 全局排版（统一字体系统） ---------- */
h1, h2, h3, h4 {
  color: var(--c-heading);
  line-height: 1.2;
  font-weight: 700;
}
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
h4 { font-size: 20px; }
p  { color: var(--c-text); font-size: var(--fs-body); }

/* ---------- 布局容器（统一1280px + 40px边距） ---------- */
.container {
  width: 100%;
  max-width: var(--s-container);
  margin: 0 auto;
  padding: 0 var(--s-container-padding);
}

/* ---------- Section 通用（统一80px间距） ---------- */
.section {
  padding: var(--s-section) 0;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.section-header { margin-bottom: 48px; }

/* 浅色区块（#F5F7FA）—— Phase4 新增 */
.section-light {
  background: var(--c-bg-light);
  color: var(--c-text-dark);
  border-top: 1px solid rgba(0,0,0,0.06);
}
.section-light h1, .section-light h2, .section-light h3,
.section-light .section-header h2 { color: var(--c-heading-dark); }
.section-light p, .section-light .section-header p { color: var(--c-text-dark); }
.section-light .section-header h2::after {
  background: linear-gradient(90deg, var(--c-accent), #3b82f6);
}

/* 深色区块（卡片蓝底） */
.section-dark { background: var(--c-bg-card); }
.section-dark h2, .section-dark .section-header h2 { color: var(--c-heading); }
.section-dark p, .section-dark .section-header p { color: var(--c-text-dim); }

/* ---------- 通用标题块 + 分割线动画 ---------- */
.section-header { text-align: center; margin-bottom: 56px; position: relative; }
.section-header h2 { margin-bottom: 12px; position: relative; display: inline-block; }
.section-header h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-accent), #00e5ff);
  border-radius: 2px;
  transition: width .6s ease .2s;
}
.section-header.in-view h2::after {
  width: 60px;
}
.section-header p  { color: var(--c-text-dim); max-width: 600px; margin: 0 auto; font-size: 16px; }

/* ============================================
   Header / 导航
   ============================================ */
.site-header {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-bottom: none;
  box-shadow: none;
  transition: background 0.3s, box-shadow 0.3s, backdrop-filter 0.3s, border-bottom 0.3s;
}
.site-header.scrolled { background: rgba(10,20,35,0.95); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); box-shadow: 0 2px 10px rgba(0,0,0,0.2); border-bottom: 1px solid rgba(255,255,255,0.08); }

.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}

/* 透明导航状态 */
.site-header:not(.scrolled) .logo-img { filter: brightness(0) invert(1); }
.site-header:not(.scrolled) .nav-link { color: rgba(255,255,255,0.92); }
.site-header:not(.scrolled) .nav-link:hover,
.site-header:not(.scrolled) .nav-link.active { color: #fff; background: rgba(255,255,255,0.10); }
.site-header:not(.scrolled) .hamburger span { background: #fff; }
.site-header:not(.scrolled) .btn-quote { border-color: rgba(255,255,255,0.5); color: #fff; }

.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-img { height: 40px; width: auto; display: block; }
.footer-brand .logo-img { height: 36px; }

.nav-desktop { display: flex; align-items: center; gap: 4px; }
.nav-link {
  padding: 8px 14px; font-size: 14px; font-weight: 500;
  color: var(--c-text); border-radius: var(--r-sm);
  transition: color 0.2s, background 0.2s;
}
.nav-link:hover, .nav-link.active { color: var(--c-white); background: rgba(255,255,255,0.06); }

.header-right { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }

/* ============================================
   按钮系统（统一44px高度 + 8px圆角）
   ============================================ */
.btn-primary, .btn-quote {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: var(--btn-height);
  padding: 0 28px;
  font-size: var(--fs-small);
  font-weight: 600;
  background: var(--c-accent); color: #fff;
  border-radius: var(--btn-radius);
  transition: background .35s ease, transform .3s ease, box-shadow .4s ease;
  box-shadow: 0 0 20px rgba(255,106,0,0.3);
  border: none;
}
.btn-primary:hover, .btn-quote:hover {
  background: linear-gradient(90deg, #FF6A00, #FF8533);
  transform: translateY(-2px);
  box-shadow: 0 0 20px rgba(255,106,0,0.4);
}

.btn-outline {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: var(--btn-height);
  padding: 0 24px;
  font-size: var(--fs-small);
  font-weight: 500;
  border: 1.5px solid var(--c-border);
  color: var(--c-white);
  background: transparent;
  border-radius: var(--btn-radius);
  transition: border-color 0.2s, color 0.2s, box-shadow 0.3s;
}
.btn-outline:hover {
  border-color: var(--c-accent); color: var(--c-accent);
  box-shadow: 0 0 12px rgba(255,106,0,0.2);
}

.btn-sm {
  height: 36px;
  padding: 0 18px;
  font-size: 13px;
}

/* Hero 单图重构（无轮播、无装饰）
   ============================================ */

/* ===== 首页 Hero（100vh 全屏视频） ===== */
.hero-home {
  position: relative;
  height: 100vh;
  width: 100%;
  overflow: hidden;
}

/* 视频层：绝对定位 + cover 全屏铺满 */
.hero-video {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  transform: translate(-50%, -50%);
  object-fit: cover;
  object-position: center 70%;
  z-index: 1;
}

/* 遮罩层（HTML div） */
.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(5, 15, 30, 0.55);
  z-index: 2;
}

/* 文字内容层 */
.hero-home .hero-content {
  position: absolute;
  top: 55%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  max-width: 1200px;
  padding: 0 24px;
  text-align: center;
  z-index: 3;
}



/* ===== 内页 Hero（基础骨架，详细样式由 hero-optimized.css 接管） ===== */
.hero-inner {
  position: relative;
  height: 360px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* 内页 hero 响应式 */
@media (max-width: 768px) {
  .hero-inner { height: 300px; }
}
}
.hero-home .hero-content h1,
  margin-bottom: 20px;
  color: #fff;
}
.hero-subtitle {
  font-size: 17px;
  color: rgba(255,255,255,0.85);
  line-height: 1.7;
  margin-bottom: 36px;
  font-weight: 400;
}
.hero-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

/* ============================================
   卡片通用样式（统一设计系统）
   ============================================ */
/* 卡片基础：统一高度、统一结构 */
.card-dark {
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
  display: flex;
  flex-direction: column;
  height: 380px;  /* 统一高度 */
  max-width: 100%;
}
.card-dark:hover {
  border-color: var(--c-accent);
  transform: translateY(-6px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.3), 0 0 25px rgba(0,229,255,0.15);
}

/* 卡片图片区域：统一4:3比例 */
.card-img {
  width: 100%;
  height: 200px;  /* 4:3比例 = 200px高 */
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--c-bg-light);
  flex-shrink: 0;
}
.card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease, filter .4s ease;
}
.card-dark:hover .card-img img {
  transform: scale(1.05);
  filter: brightness(1.1);
}

/* 卡片内容区域：统一结构 */
.card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
}

/* 卡片标题：统一高度（最多2行） */
.card-title {
  font-size: var(--fs-small);
  font-weight: 600;
  color: var(--c-heading);
  margin-bottom: 8px;
  line-height: 1.4;
  min-height: 40px;  /* 2行高度 */
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 卡片描述：统一2行限制 */
.card-desc {
  font-size: 13px;
  color: var(--c-text-dim);
  line-height: 1.55;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;  /* 最多2行 */
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 16px;
}

/* 卡片标签 */
.card-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--c-accent);
  margin-bottom: 8px;
}

/* 卡片按钮：底部对齐 */
.card-body .btn-sm,
.card-body .btn-outline {
  margin-top: auto;
  align-self: flex-start;
}

/* 全球成交 & 物流可视化模块（最终版） */
.global-map {
  width: 100%;
  min-height: 480px;
  height: auto;
  aspect-ratio: auto;
  border-radius: 12px;
  overflow: hidden;
  position: relative;
  background: #071320;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.global-map:hover {
  transform: scale(1.01);
  box-shadow: 0 8px 32px rgba(0,207,255,0.12), 0 0 60px rgba(255,106,0,0.06);
}

/* 底部数据覆盖层 */
.map-overlay-data {
  position: absolute;
  bottom: 10px;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: center;
  gap: 30px;
  color: #00cfff;
  font-size: 14px;
  font-family: 'Inter', -apple-system, sans-serif;
  pointer-events: none;
}

/* 保留 about-visual 兼容旧代码（如果有其他地方引用） */
.about-visual {
  width: 100%;
  height: 320px;
  border-radius: 12px;
  overflow: hidden;
  position: relative;
  background: #0b1a2a;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.about-visual:hover {
  transform: scale(1.02);
  box-shadow: 0 8px 32px rgba(0,207,255,0.15), 0 0 60px rgba(255,106,0,0.08);
}

/* 地图航线流动动画 */
@keyframes abDash {
  to { stroke-dashoffset: -20; }
}

.card-img {
  width: 100%;
  height: 200px;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--c-bg-light);
  flex-shrink: 0;
}
.card-img img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .4s ease, filter .4s ease;
}
.card-dark:hover .card-img img {
  transform: scale(1.05);
  filter: brightness(1.1);
}

/* ============================================
   网格系统（统一24px间距）
   ============================================ */
/* 3列网格 */
.blog-grid,
.cards-grid-3,
.apps-row-1,
.apps-row-2 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-gap);
}

/* 4列网格 */
.cards-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--s-gap);
}

/* ============================================
   Products 卡片（统一设计系统）
   ============================================ */
.product-card {
  height: 380px;
}
.product-card .product-card-img {
  width: 100%;
  height: 200px;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--c-bg-light);
  flex-shrink: 0;
}
.product-card .product-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}
.product-card:hover .product-card-img img {
  transform: scale(1.05);
}

/* ============================================
   Blog 卡片（统一设计系统）
   ============================================ */
.blog-card {
  height: 380px;
}
.blog-grid .card-dark {
  height: 380px;
}
.blog-grid .card-dark:hover,
.blog-card.card-dark:hover {
  transform: translateY(-6px);
  box-shadow: 0 0 20px rgba(0,229,255,0.15);
}
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.4s;
}
.product-card:hover .card-img img,
.product-card:hover .product-card-img img {
  transform: scale(1.05);
}

/* Featured 卡片 */
.card-featured {
  border-color: rgba(0,229,255,0.3) !important;
}
.card-featured .card-title::before {
  content: "★ ";
  color: var(--c-cyan);
  font-size: 12px;
}

/* ============================================
   About / Quality 图文布局
   ============================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-text h2 { margin-bottom: 16px; }
.about-text p  { line-height: 1.8; margin-bottom: 24px; }
.about-features {
  display: flex; flex-direction: column; gap: 10px;
  margin-bottom: 28px;
}
.about-feature-item {
  display: flex; align-items: center; gap: 10px;
  font-size: 14px; color: var(--c-text);
}
.check-icon { color: var(--c-accent); font-size: 16px; flex-shrink: 0; }
.about-img { overflow: hidden; border-radius: var(--r-lg); }
.about-img img { width: 100%; height: 380px; object-fit: cover; object-position: center 30%; }

/* 首页全球地图（铺满区域） */
.global-map-home {
  min-height: 420px;
  height: auto;
  background: #071320;
}
/* 首页 About 区域：地图在左、文字在右 */
.about-grid > .about-text { order: 2; }
.about-grid > .about-img  { order: 1; }

.quality-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}
.quality-img img {
  width: 100%; height: 400px; object-fit: cover;
  border-radius: var(--r-md);
}
.quality-text h2 { margin-bottom: 14px; }
.quality-text p  { color: var(--c-text-dim); line-height: 1.8; margin-bottom: 28px; }
.quality-checklist {
  display: grid; grid-template-columns: 1fr 1fr; gap: 10px;
  margin-bottom: 32px;
}
.quality-check-item {
  display: flex; align-items: center; gap: 8px;
  background: var(--c-bg-light); border: 1px solid var(--c-border);
  border-radius: var(--r-sm); padding: 12px 14px;
  font-size: 14px; color: var(--c-text);
}

/* ============================================
   CTA 区块（转化核心）
   ============================================ */
.cta-block {
  position: relative;
  background: linear-gradient(135deg, var(--c-bg) 0%, #1c0a00 100%);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  text-align: center;
  padding: var(--s-section) 0;
  overflow: hidden;
}
.cta-block::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/images/cta-bg.jpg') center/cover no-repeat;
  opacity: 0.12;
  z-index: 0;
  pointer-events: none;
}
.cta-block .container { position: relative; z-index: 1; }
.cta-block h2 { margin-bottom: 16px; color: #fff; }
.cta-block p  { max-width: 600px; margin: 0 auto 32px; color: var(--c-text-dim); font-size: 16px; }
.cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.cta-buttons .btn-primary {
  background: var(--c-accent);
  box-shadow: 0 0 24px rgba(255,106,0,0.4);
}

/* CTA 芯片动画背景 */
.cta-chip-anim {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.cta-chip-anim iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

/* ============================================
   Distribution Brands
   ============================================ */
.distribution-brands {
  background: var(--c-bg);
  padding: 60px 0 30px;
  overflow: hidden;
  position: relative;
  border-top: 1px solid var(--c-border);
}
.distribution-brands .section-header h2 { color: #fff; }
.distribution-brands .section-header p { color: rgba(255,255,255,0.55); }

.logo-slider {
  position: relative;
  overflow: hidden;
  padding: 20px 0;
  -webkit-mask-image: linear-gradient(to right, transparent 0%, #000 8%, #000 92%, transparent 100%);
  mask-image: linear-gradient(to right, transparent 0%, #000 8%, #000 92%, transparent 100%);
}
.logo-track {
  display: flex;
  align-items: center;
  gap: 50px;
  width: max-content;
  animation: logoScroll 30s linear infinite;
  will-change: transform;
}
.logo-track:hover { animation-play-state: paused; }

@keyframes logoScroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

.brand-logo {
  height: 50px;
  width: auto;
  max-width: 140px;
  object-fit: contain;
  filter: grayscale(100%) opacity(0.6);
  transition: filter 0.3s, box-shadow 0.3s, transform 0.2s;
  flex-shrink: 0;
}
.brand-logo:hover {
  filter: grayscale(0%) opacity(1);
  box-shadow: 0 0 18px rgba(255,106,0,0.45);
  border-radius: 4px;
  transform: scale(1.05);
}
.compliance-note {
  text-align: center;
  font-size: 12px;
  color: rgba(255,255,255,0.35);
  margin-top: 18px;
  letter-spacing: 0.3px;
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
  background: var(--c-bg);
  padding: 60px 0;
}

/* ===== 浅色区块内的卡片（Phase4 新增）===== */
.section-light .card-dark {
  background: #FFFFFF;
  border: 1px solid #E5E7EB;
  color: var(--c-text-dark);
}
.section-light .card-dark:hover {
  border-color: var(--c-accent);
  box-shadow: 0 12px 36px rgba(0,0,0,0.10), 0 0 20px rgba(255,106,0,0.08);
}
.section-light .card-title,
.section-light .card-dark h3 { color: var(--c-heading-dark); }
.section-light .card-desc,
.section-light .card-dark p  { color: var(--c-text-dark); }
.section-light .quality-check-item {
  background: #FFFFFF;
  border: 1px solid #E5E7EB;
  color: var(--c-text-dark);
}
/* 浅色区块内的按钮 */
.section-light .btn-outline {
  color: var(--c-heading-dark);
  border-color: #D1D5DB;
}
.section-light .btn-outline:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
}
.section-light .btn-sm.btn-outline {
  color: var(--c-accent);
  border-color: var(--c-accent);
}

/* ===== Fade-in 动画（Phase4 新增，与 main.js .in-view 统一）===== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Blog 分类标签（Phase4 新增）===== */
.category-tab:hover {
  border-color: var(--c-accent) !important;
  color: var(--c-accent) !important;
}

/* ===== Blog 文章行（Phase4 新增）===== */
.blog-article-row {
  transition: opacity 0.3s ease;
}
@media (max-width: 768px) {
  .blog-article-row {
    grid-template-columns: 1fr !important;
  }
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 36px;
}
.footer-brand p {
  color: var(--c-text-dim); font-size: 14px; line-height: 1.7;
  margin: 16px 0 20px;
}
.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 36px; height: 36px; border-radius: var(--r-sm);
  background: var(--c-bg-light); display: flex; align-items: center; justify-content: center;
  font-size: 13px; color: var(--c-text); transition: background 0.2s, color 0.2s, transform 0.2s;
}
.footer-social a:hover { background: var(--c-accent); color: #fff; transform: translateY(-2px); }

.footer-title {
  font-size: 14px; font-weight: 600; color: var(--c-white);
  margin-bottom: 20px; text-transform: uppercase; letter-spacing: 0.5px;
}
.footer-links li { margin-bottom: 10px; }
.footer-links a { font-size: 14px; color: var(--c-text-dim); transition: color 0.2s; }
.footer-links a:hover { color: var(--c-accent); }

.footer-contact-item { display: flex; gap: 12px; margin-bottom: 16px; }
.footer-contact-item .icon { color: var(--c-accent); flex-shrink: 0; margin-top: 2px; }
.footer-contact-item .label { font-size: 12px; color: var(--c-text-dim); margin-bottom: 2px; }
.footer-contact-item .value { font-size: 14px; color: var(--c-text); }

.footer-bottom {
  border-top: 1px solid var(--c-border); padding-top: 24px;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 13px; color: var(--c-text-dim);
  margin-top: 48px;
}
.footer-bottom a { color: var(--c-text-dim); transition: color 0.2s; }
.footer-bottom a:hover { color: var(--c-accent); }

/* ============================================
   Header 补充
   ============================================ */
.btn-quote {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 20px; font-size: 13px; font-weight: 600;
  background: var(--c-accent); color: #fff;
  border-radius: var(--r-sm); transition: background 0.2s, box-shadow 0.3s;
}

.hamburger {
  display: none; flex-direction: column; gap: 5px;
  padding: 8px; cursor: pointer; background: none;
}
.hamburger span {
  width: 22px; height: 2px; background: var(--c-white); border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.mobile-nav {
  display: none; position: fixed; top: 72px; left: 0; width: 100%;
  background: rgba(11,12,15,0.98); backdrop-filter: blur(12px);
  padding: 16px 24px 32px; z-index: 999;
  flex-direction: column; gap: 4px;
}
.mobile-nav.open { display: flex; }
.mobile-nav .nav-link { padding: 12px 14px; font-size: 16px; }
.mobile-nav .btn-quote { margin-top: 12px; justify-content: center; }

/* ============================================
   响应式
   ============================================ */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  :root { --s-section: 80px; }
  .cards-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .about-grid { gap: 40px; }
  .quality-grid { gap: 40px; }
  .apps-row-1, .apps-row-2 { grid-template-columns: repeat(2, 1fr); }
  .blog-grid, .cards-grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-desktop, .header-right .btn-quote { display: none; }
  .hamburger { display: flex; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .hero-home { min-height: auto; }
  .hero-home .hero-content { top: 50%; }
  .cta-buttons { flex-direction: column; align-items: center; }
  :root { --s-section: 64px; }
  .about-grid { grid-template-columns: 1fr; }
  .quality-grid { grid-template-columns: 1fr; }
  .cards-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .apps-row-1, .apps-row-2 { grid-template-columns: repeat(2, 1fr); }
  .blog-grid, .cards-grid-3 { grid-template-columns: 1fr; }
  .blog-grid .card-dark { height: auto; min-height: 360px; }
  .about-img img { height: 260px; }
  .quality-img img { height: 260px; }
  .distribution-brands { padding: 40px 0 20px; }
  .logo-slider {
    -webkit-mask-image: none; mask-image: none;
    overflow-x: auto; -webkit-overflow-scrolling: touch; scroll-snap-type: x mandatory;
  }
  .logo-track { gap: 30px; animation: none; width: auto; }
  .brand-logo { height: 40px; scroll-snap-align: center; }
}

@media (max-width: 480px) {
  .cards-grid-4 { grid-template-columns: 1fr; }
  .apps-row-1, .apps-row-2 { grid-template-columns: 1fr; }
  .blog-grid .card-dark { height: auto; min-height: 340px; }
}

/* ============================================
   Video Section（Quality 展示）
   ============================================ */
.video-section {
  background: var(--c-bg-card);
}

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

.video-card {
  background: var(--c-bg);
  border-radius: 14px;
  overflow: hidden;
  transition: transform 0.35s ease, box-shadow 0.35s ease;
  cursor: pointer;
}

.video-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 36px rgba(0,0,0,0.35), 0 0 20px rgba(255,106,0,0.10);
}

.video-wrap {
  position: relative;
  overflow: hidden;
  border-radius: 14px 14px 0 0;
}

.video-wrap video {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: 14px 14px 0 0;
  display: block;
  transition: transform 0.4s ease;
}

.video-card:hover .video-wrap video {
  transform: scale(1.05);
}

/* 底部渐变遮罩 */
.video-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.6), transparent 60%);
  pointer-events: none;
  border-radius: 14px 14px 0 0;
}

/* 播放图标指示 */
.video-play-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 48px;
  height: 48px;
  background: rgba(255,106,0,0.85);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.3s ease, transform 0.3s ease;
  pointer-events: none;
}

.video-play-icon svg {
  width: 20px;
  height: 20px;
  fill: #fff;
  margin-left: 2px;
}

.video-card.is-playing .video-play-icon {
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.8);
}

.video-card-body {
  padding: 18px 20px 22px;
}

.video-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--c-heading);
  margin-bottom: 6px;
  line-height: 1.35;
}

.video-card-desc {
  font-size: 13px;
  color: var(--c-text-dim);
  line-height: 1.55;
  margin: 0;
}

/* 响应式 */
@media (max-width: 1024px) {
  .video-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .video-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .video-wrap video { height: 200px; }
}

@media (max-width: 480px) {
  .video-wrap video { height: 180px; }
  .video-card-body { padding: 14px 16px 18px; }
}

/* ===========================================
   Inquiry Modal & Floating Buttons
   =========================================== */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.65);
  z-index: 9999;
  justify-content: center;
  align-items: center;
  padding: 20px;
}
.modal-overlay.open {
  display: flex;
}
.modal-content {
  background: var(--c-card);
  border-radius: 16px;
  padding: 36px 32px;
  max-width: 480px;
  width: 100%;
  position: relative;
  border: 1px solid var(--c-border);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  animation: modalIn 0.25s ease;
}
@keyframes modalIn {
  from { opacity: 0; transform: translateY(20px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  font-size: 28px;
  color: var(--c-text-dim);
  background: none;
  border: none;
  cursor: pointer;
  line-height: 1;
  transition: color 0.2s;
}
.modal-close:hover { color: var(--c-white); }
.modal-content h2 {
  font-size: 22px;
  color: var(--c-heading);
  margin-bottom: 24px;
}
.modal-content .form-group {
  margin-bottom: 16px;
}
.modal-content .form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 6px;
}
.modal-content .form-group input,
.modal-content .form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--c-border);
  background: var(--c-bg);
  color: var(--c-white);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}
.modal-content .form-group input:focus,
.modal-content .form-group textarea:focus {
  border-color: var(--c-accent);
}
.modal-content .form-group textarea {
  resize: vertical;
  min-height: 80px;
}

/* Floating Buttons */
.floating-btn-group {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 9980;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.floating-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0,0,0,0.35);
  transition: transform 0.2s, box-shadow 0.2s;
  text-decoration: none;
}
.floating-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 24px rgba(0,0,0,0.45);
}
.floating-btn.whatsapp {
  background: #25D366;
}
.floating-btn.inquiry {
  background: var(--c-accent);
}
@media (max-width: 768px) {
  .floating-btn-group { bottom: 18px; right: 18px; }
  .floating-btn { width: 46px; height: 46px; font-size: 16px; }
}

/* ============================================
   Carousel 轮播组件（Hot Products / Cases / Blog）
   ============================================ */
.carousel-wrapper {
  position: relative;
}
.carousel-track-wrap {
  overflow: hidden;
  margin: 0 -12px;
  padding: 12px;
}
.carousel-track {
  display: flex;
  gap: 24px;
  transition: transform 0.45s cubic-bezier(0.25, 0.8, 0.25, 1);
  cursor: grab;
  user-select: none;
}
.carousel-track:active { cursor: grabbing; }
.carousel-track > * {
  flex: 0 0 calc(25% - 18px);
  min-width: 0;
}

/* 轮播箭头（右上角） */
.carousel-btn {
  position: absolute;
  top: -52px;
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1.5px solid rgba(255,255,255,0.25);
  background: rgba(255,255,255,0.08);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
  z-index: 5;
}
.carousel-btn:hover {
  background: rgba(255,255,255,0.18);
  border-color: var(--c-accent);
}
.carousel-btn.prev { right: 52px; }
.carousel-btn.next { right: 0; }
.carousel-btn svg { width: 18px; height: 18px; stroke: #fff; fill: none; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.carousel-btn:hover svg { stroke: var(--c-accent); }

/* section-header 需要相对定位，给箭头定位用 */
.section-header { position: relative; }

/* Case 卡片统一高度 */
.card-dark.card-case {
  height: auto;
  min-height: 420px;
  display: flex;
  flex-direction: column;
}
.card-case .card-case-body {
  display: flex;
  flex-direction: column;
  flex: 1;
}
.card-case .card-case-desc {
  flex: 1;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
}

/* Industries 模块紧凑 */
.industries-section {
  padding-top: 40px !important;
}
.industries-section .section-header {
  margin-bottom: 20px;
}

/* 8行业 4x2 网格 */
.industries-grid-4x2 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.industries-grid-4x2 .card-dark {
  height: auto;
  min-height: 320px;
}

/* ===== Industries Card（应用图 + 悬停动效）===== */
.industry-card {
  background: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: var(--r-md);
  overflow: hidden;
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
  display: flex;
  flex-direction: column;
  min-height: 340px;
}

.industry-card:hover {
  border-color: var(--c-accent);
  transform: translateY(-6px);
  box-shadow: 0 12px 36px rgba(0,0,0,0.10), 0 0 20px rgba(255,106,0,0.08);
}

.industry-img {
  position: relative;
  width: 100%;
  height: 200px;
  overflow: hidden;
  background: var(--c-bg-light);
  flex-shrink: 0;
}

.industry-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.industry-card:hover .industry-img img {
  transform: scale(1.05);
}

.industry-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.5) 0%, transparent 60%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.industry-card:hover .industry-overlay {
  opacity: 1;
}

.industry-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.industry-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--c-heading-dark);
  margin-bottom: 10px;
  line-height: 1.35;
}

.industry-desc {
  font-size: 13px;
  color: var(--c-text-dark);
  line-height: 1.6;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 14px;
}

.industry-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--c-accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.3s ease, color 0.3s;
  margin-top: auto;
}

.industry-link:hover {
  gap: 10px;
  color: var(--c-accent-h);
}

.industry-link span {
  transition: transform 0.3s ease;
  display: inline-block;
}

.industry-link:hover span {
  transform: translateX(4px);
}

/* 响应式：Industries 卡片 */
@media (max-width: 1024px) {
  .industry-card {
    min-height: 300px;
  }
  .industry-img {
    height: 180px;
  }
}

@media (max-width: 768px) {
  .industry-card {
    min-height: auto;
  }
  .industry-img {
    height: 200px;
  }
}

@media (max-width: 480px) {
  .industry-img {
    height: 180px;
  }
}

/* 响应式：轮播 */
@media (max-width: 1024px) {
  .carousel-track > * { flex: 0 0 calc(33.333% - 16px); }
  .industries-grid-4x2 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .carousel-track > * { flex: 0 0 calc(100% - 0px); }
  .carousel-btn { top: -46px; width: 36px; height: 36px; }
  .carousel-btn.prev { right: 44px; }
  .industries-grid-4x2 { grid-template-columns: 1fr; }
}

/* ===== Hero + section 间距优化 ===== */
.hero-home + section {
  margin-top: 0 !important;
  padding-top: 40px !important;
}

/* ===== Case card-footer 统一布局（icon + 数值 + label） ===== */
.card-footer {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.card-metric {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
  min-width: 0;          /* 允许缩小，防止撑破 */
}
.card-metric strong {
  color: #ff6a00;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.3;
  white-space: nowrap;
}
.card-metric span {
  font-size: 11px;
  color: var(--c-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Hot Products 左侧空白清除 */
.carousel-wrapper .carousel-track-wrap {
  margin-left: 0;
  padding-left: 0;
}

/* ============================================
   About Section（仿站重构 - 左图右文+数据统计）
   ============================================ */
.about-section {
  background: var(--c-bg-light);
  max-width: 1280px;
  margin: 0 auto;
  padding: 80px 40px;
}

.about-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

/* 左侧区域 */
.about-left {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.about-image-wrap {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}

.about-image {
  width: 100%;
  height: auto;
  border-radius: 12px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.about-image-wrap:hover .about-image {
  transform: scale(1.03);
}

/* 经验徽章 */
.about-experience-badge {
  position: absolute;
  bottom: 24px;
  right: 24px;
  background: var(--c-accent);
  color: white;
  padding: 20px 28px;
  border-radius: var(--r-md);
  text-align: center;
  box-shadow: 0 10px 30px rgba(255,106,0,0.3);
}

.badge-number {
  display: block;
  font-size: 36px;
  font-weight: 800;
  line-height: 1;
}

.badge-text {
  display: block;
  font-size: 13px;
  font-weight: 500;
  margin-top: 4px;
  opacity: 0.95;
}

/* 数据统计 */
.about-stats {
  margin-top: 30px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.stat-item {
  background: white;
  padding: 24px 16px;
  border-radius: var(--r-md);
  text-align: center;
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: baseline;
  gap: 2px;
}

.stat-number {
  font-size: 28px;
  font-weight: 800;
  color: var(--c-accent);
  line-height: 1;
}

.stat-suffix {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-accent);
}

.stat-label {
  width: 100%;
  font-size: 12px;
  color: var(--c-text-dark);
  margin-top: 8px;
  font-weight: 500;
}

/* 右侧区域 */
.about-right {
  padding-top: 20px;
}

.about-section .section-eyebrow {
  color: var(--c-accent);
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
}

.about-title {
  font-size: 36px;
  font-weight: 700;
  color: var(--c-heading-dark);
  line-height: 1.3;
  margin-bottom: 24px;
}

.about-desc {
  font-size: 15px;
  color: var(--c-text-dark);
  line-height: 1.8;
  margin-bottom: 16px;
}

.about-features {
  margin: 32px 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.about-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
}

.feature-icon {
  width: 24px;
  height: 24px;
  background: rgba(255,106,0,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.feature-text {
  font-size: 14px;
  color: var(--c-text-dark);
  font-weight: 500;
}

.about-cta {
  margin-top: 8px;
  display: inline-flex;
}

/* About 响应式 */
@media (max-width: 1024px) {
  .about-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .about-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .about-title {
    font-size: 28px;
  }
}

@media (max-width: 640px) {
  .about-section {
    padding: 60px 20px;
  }
  
  .about-image {
    height: 280px;
  }
  
  .about-experience-badge {
    padding: 14px 20px;
  }
  
  .badge-number {
    font-size: 28px;
  }
  
  .about-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  
  .stat-item {
    padding: 18px 12px;
  }
  
  .stat-number {
    font-size: 22px;
  }
}

/* ============================================
   Why Choose Section（4列图标卡片 + 悬停动效）
   ============================================ */
.why-choose-section {
  background: var(--c-bg);
  padding: 100px 0;
}

.why-choose-section .section-header {
  text-align: center;
  margin-bottom: 60px;
}

.why-choose-section .section-eyebrow {
  color: var(--c-accent);
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 12px;
}

.why-choose-section h2 {
  font-size: 36px;
  font-weight: 700;
  color: var(--c-heading);
  margin-bottom: 16px;
}

.why-choose-section p {
  font-size: 16px;
  color: var(--c-text);
  max-width: 600px;
  margin: 0 auto;
}

.why-choose-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.why-card {
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 40px 28px;
  text-align: center;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.why-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-accent), var(--c-accent-h));
  transform: scaleX(0);
  transition: transform 0.4s ease;
}

.why-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.3);
  border-color: rgba(255,106,0,0.3);
}

.why-card:hover::before {
  transform: scaleX(1);
}

.why-icon-wrap {
  width: 72px;
  height: 72px;
  background: rgba(255,106,0,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  transition: all 0.3s ease;
}

.why-card:hover .why-icon-wrap {
  background: var(--c-accent);
  transform: scale(1.1);
}

.why-icon {
  width: 32px;
  height: 32px;
  color: var(--c-accent);
  transition: color 0.3s ease;
}

.why-card:hover .why-icon {
  color: white;
}

.why-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-heading);
  margin-bottom: 12px;
}

.why-desc {
  font-size: 14px;
  color: var(--c-text);
  line-height: 1.7;
  margin-bottom: 20px;
}

.why-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-accent);
  transition: color 0.3s ease;
}

.why-link:hover {
  color: var(--c-accent-h);
}

/* Why Choose 响应式 */
@media (max-width: 1024px) {
  .why-choose-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .why-choose-section {
    padding: 60px 0;
  }
  
  .why-choose-section h2 {
    font-size: 28px;
  }
  
  .why-choose-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .why-card {
    padding: 32px 24px;
  }
}