/**
 * Precision Instruments — 精密仪器仪表企业官网
 * 深蓝科技暗色主题 + 科技蓝强调 + 精密技术手册风格
 * 原生 CSS，CSS 变量驱动，无框架依赖
 * PBootCMS 第三方模板模式
 */



/* ============================================================
   CSS 变量体系 — 精密仪器暗色主题
   ============================================================ */
:root {
  /* 基底色 — 深蓝夜空 */
  --bg-deep: #060B14;
  --bg-primary: #0B1A2E;
  --bg-secondary: #0F1F36;
  --bg-card: rgba(255, 255, 255, 0.025);
  --bg-card-hover: rgba(26, 107, 176, 0.08);
  --bg-input: rgba(255, 255, 255, 0.04);

  /* 科技蓝 — 强调色系 */
  --tech-blue: #1A6BB0;
  --tech-blue-light: #2196D8;
  --tech-blue-dark: #0F4A7A;
  --tech-blue-dim: rgba(26, 107, 176, 0.15);
  --tech-blue-glow: rgba(26, 107, 176, 0.3);
  --tech-blue-border: rgba(26, 107, 176, 0.25);

  /* 文字色阶 */
  --text-primary: #E8ECF4;
  --text-secondary: #8A9BB0;
  --text-muted: #4A5568;
  --text-data: #5EEAD4;

  /* 银色/灰色系 */
  --silver: #8A9BB0;
  --silver-light: #B0BEC5;
  --silver-dim: rgba(138, 155, 176, 0.15);

  /* 边框 */
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-card: rgba(26, 107, 176, 0.15);
  --border-card-hover: rgba(26, 107, 176, 0.4);

  /* 阴影 */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-glow-blue: 0 0 20px rgba(26, 107, 176, 0.1);
  --shadow-glow-strong: 0 0 40px rgba(26, 107, 176, 0.2);

  /* 圆角 — 精密小圆角 */
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  /* 间距 */
  --section-py: 80px;
  --section-py-sm: 50px;
  --container-max: 1200px;
  --header-h: 68px;

  /* 过渡 */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;

  /* 字体 — 现代科技风格 */
  --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', -apple-system, sans-serif;
  --font-body: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Cascadia Code', 'Consolas', 'Courier New', monospace;
}

/* ============================================================
   全局重置 & 基础
   ============================================================ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.75;
  color: var(--text-primary);
  background: var(--bg-deep);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

a {
  color: var(--tech-blue-light);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}
a:hover { color: var(--tech-blue); }

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol { list-style: none; }

input, button, textarea, select {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}

button { cursor: pointer; }

/* 滚动条 */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: var(--tech-blue-dark); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--tech-blue); }

/* ============================================================
   布局容器
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: var(--section-py) 0;
  position: relative;
}

.section--sm { padding: var(--section-py-sm) 0; }

/* 深色科技背景区块 */
.section--dark {
  background: var(--bg-primary);
  position: relative;
}

.section--darker {
  background: var(--bg-deep);
  position: relative;
}

/* 区块标题 */
.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--tech-blue-light);
  border: 1px solid var(--tech-blue-border);
  padding: 4px 12px;
  border-radius: var(--radius-xs);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.6;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-header--left { text-align: left; }

/* 区块顶部装饰线 */
.section-header::after {
  content: '';
  display: block;
  width: 40px;
  height: 2px;
  background: var(--tech-blue);
  margin: 16px auto 0;
}
.section-header--left::after { margin: 16px 0 0; }

/* ============================================================
   按钮系统
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 24px;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  border-radius: var(--radius-sm);
  transition: all var(--duration-normal) var(--ease-out);
  cursor: pointer;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn--primary {
  background: var(--tech-blue);
  color: #fff;
  border: 1px solid var(--tech-blue);
}
.btn--primary:hover {
  background: var(--tech-blue-light);
  border-color: var(--tech-blue-light);
  color: #fff;
  box-shadow: var(--shadow-glow-blue);
}

.btn--outline {
  background: transparent;
  color: var(--tech-blue-light);
  border: 1px solid var(--tech-blue-border);
}
.btn--outline:hover {
  background: var(--tech-blue-dim);
  border-color: var(--tech-blue);
  color: #fff;
}

.btn--ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid transparent;
}
.btn--ghost:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.03);
}

.btn--light {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}
.btn--light:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--border-card-hover);
}

.btn--sm {
  padding: 7px 16px;
  font-size: 0.82rem;
}

.btn--lg {
  padding: 14px 32px;
  font-size: 1rem;
}

/* ============================================================
   Header — 深色固定导航 (13.3 z-index / 13.4 hamburger)
   ============================================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(11, 26, 46, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--duration-normal) var(--ease-out);
}
.header--scrolled {
  background: rgba(11, 26, 46, 0.98);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

.header__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 24px;
}

/* Logo */
.header__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: var(--text-primary);
  text-decoration: none;
}
.header__logo-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--tech-blue-dark), var(--tech-blue));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: #fff;
}
.header__logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.header__logo-name {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-primary);
}
.header__logo-sub {
  font-size: 0.62rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* 主导航 */
.header__nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.header__nav-item {
  position: relative;
}
.header__nav-link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 14px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
  white-space: nowrap;
  cursor: pointer;
}
.header__nav-link:hover,
.header__nav-link.active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}
.header__nav-link.active { color: var(--tech-blue-light); }

/* 导航下拉 (13.3 z-index) */
.header__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 60;
  min-width: 180px;
  padding: 8px 0;
  background: rgba(15, 31, 54, 0.98);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--duration-normal) var(--ease-out);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
}
.header__nav-item:hover .header__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(4px);
}
.header__dropdown a {
  display: block;
  padding: 10px 18px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
}
.header__dropdown a:hover {
  color: var(--text-primary);
  background: rgba(26, 107, 176, 0.12);
}

/* Header 右侧操作区 */
.header__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.header__cta {
  padding: 8px 16px;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: #fff;
  background: var(--tech-blue);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: all var(--duration-fast) var(--ease-out);
}
.header__cta:hover {
  background: var(--tech-blue-light);
  color: #fff;
  box-shadow: var(--shadow-glow-blue);
}

/* 汉堡菜单 (13.4 独立于 header__actions) */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
  background: transparent;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
}
.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 1px;
  transition: all var(--duration-normal) var(--ease-out);
}
.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.active span:nth-child(2) {
  opacity: 0;
}
.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 移动端侧滑菜单 */
.mobile-nav {
  position: fixed;
  top: 0;
  right: 0;
  width: 300px;
  max-width: 80vw;
  height: 100vh;
  z-index: 200;
  background: var(--bg-primary);
  transform: translateX(100%);
  transition: transform var(--duration-slow) var(--ease-out);
  overflow-y: auto;
  box-shadow: -4px 0 40px rgba(0, 0, 0, 0.6);
}
.mobile-nav.active { transform: translateX(0); }
.mobile-nav__inner { padding: 24px; }

.mobile-nav__link {
  display: block;
  padding: 14px 16px;
  font-size: 1rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
}
.mobile-nav__link:hover { color: var(--text-primary); background: rgba(255,255,255,0.03); }

.mobile-nav__sub {
  display: none;
  padding-left: 16px;
  margin-bottom: 8px;
}
.mobile-nav__sub.active { display: block; }
.mobile-nav__sub a {
  display: block;
  padding: 10px 16px;
  font-size: 0.9rem;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
}
.mobile-nav__sub a:hover { color: var(--text-secondary); }

.mobile-nav__overlay {
  position: fixed;
  inset: 0;
  z-index: 150;
  background: rgba(0,0,0,0.5);
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-normal) var(--ease-out);
}
.mobile-nav__overlay.active {
  opacity: 1;
  visibility: visible;
}

/* ============================================================
   Hero / Banner 轮播区
   ============================================================ */
.hero {
  position: relative;
  width: 100%;
  height: 100vh;
  min-height: 600px;
  max-height: 850px;
  overflow: hidden;
}
.hero .swiper { width: 100%; height: 100%; }
.hero .swiper-slide {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(
    180deg,
    rgba(6, 11, 20, 0.7) 0%,
    rgba(11, 26, 46, 0.5) 50%,
    rgba(6, 11, 20, 0.85) 100%
  );
}
.hero__grid-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image:
    linear-gradient(rgba(26, 107, 176, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 107, 176, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* Hero 文字内容 */
.hero__content {
  position: absolute;
  z-index: 5;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  width: 90%;
  max-width: 800px;
}
.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
  text-shadow: 0 0 40px rgba(26, 107, 176, 0.5);
}
.hero__subtitle {
  font-size: clamp(0.95rem, 1.5vw, 1.15rem);
  color: var(--silver-light);
  margin-bottom: 28px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}
.hero__actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Swiper 分页器 */
.hero .swiper-pagination { z-index: 5; bottom: 40px; }
.hero .swiper-pagination-bullet {
  width: 24px;
  height: 3px;
  border-radius: 1px;
  background: rgba(255, 255, 255, 0.3);
  opacity: 1;
  transition: all var(--duration-normal) var(--ease-out);
}
.hero .swiper-pagination-bullet-active {
  background: var(--tech-blue);
  width: 40px;
}

/* 滚动指示器 */
.hero__scroll {
  position: absolute;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}
.hero__scroll-line {
  width: 1px;
  height: 36px;
  background: linear-gradient(to bottom, var(--tech-blue), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.2; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.4); }
}

/* ============================================================
   精度数据统计 — 数字滚动
   ============================================================ */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-card);
}
.stat-item {
  padding: 36px 20px;
  text-align: center;
  border-right: 1px solid var(--border-subtle);
  transition: background var(--duration-normal) var(--ease-out);
}
.stat-item:last-child { border-right: none; }
.stat-item:hover { background: var(--bg-card-hover); }

.stat-item__icon {
  font-size: 1.6rem;
  color: var(--tech-blue);
  margin-bottom: 10px;
}
.stat-item__number {
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--text-data);
  letter-spacing: 0.02em;
  margin-bottom: 6px;
}
.stat-item__label {
  font-size: 0.85rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

/* ============================================================
   产品分类卡片 — 5列网格
   ============================================================ */
.category-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}
.category-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 32px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  text-align: center;
  transition: all var(--duration-normal) var(--ease-out);
  cursor: pointer;
  text-decoration: none;
}
.category-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-card-hover);
  box-shadow: var(--shadow-glow-blue);
  transform: translateY(-3px);
}
.category-card__icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--tech-blue-dim);
  border-radius: var(--radius-sm);
  font-size: 1.5rem;
  color: var(--tech-blue-light);
  transition: all var(--duration-normal) var(--ease-out);
}
.category-card:hover .category-card__icon {
  background: var(--tech-blue);
  color: #fff;
  box-shadow: var(--shadow-glow-blue);
}
.category-card__name {
  font-family: var(--font-heading);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-primary);
}
.category-card__desc {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

/* ============================================================
   产品/案例/新闻 通用网格
   ============================================================ */
.product-grid,
.case-grid,
.news-list {
  display: grid;
  gap: 20px;
}

.product-grid { grid-template-columns: repeat(3, 1fr); }
.case-grid { grid-template-columns: repeat(4, 1fr); }

/* ============================================================
   通用卡片组件
   ============================================================ */
.card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out);
  text-decoration: none;
  color: var(--text-primary);
  cursor: pointer;
}
.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-card-hover);
  box-shadow: var(--shadow-glow-blue);
  transform: translateY(-4px);
}
.card__image {
  position: relative;
  width: 100%;
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--bg-secondary);
}
.card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-out);
}
.card:hover .card__image img { transform: scale(1.05); }
.card__body { padding: 20px; }
.card__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--tech-blue-light);
  background: var(--tech-blue-dim);
  padding: 3px 10px;
  border-radius: var(--radius-xs);
  margin-bottom: 8px;
}
.card__title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card__desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card__meta {
  display: flex;
  gap: 16px;
  margin-top: 12px;
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}
.card__meta i { color: var(--tech-blue-light); margin-right: 4px; }

/* 产品卡片特殊 — 显示扩展字段 */
.card__specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 12px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
}
.card__spec {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.card__spec-label {
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.card__spec-value {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-data);
  letter-spacing: 0.02em;
}

/* ============================================================
   新闻列表项 — 左图右文
   ============================================================ */
.news-item {
  display: flex;
  gap: 20px;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  transition: all var(--duration-normal) var(--ease-out);
  cursor: pointer;
  text-decoration: none;
  color: var(--text-primary);
}
.news-item:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-card);
  box-shadow: var(--shadow-sm);
}
.news-item__image {
  width: 200px;
  min-width: 200px;
  aspect-ratio: 4/3;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-secondary);
}
.news-item__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.news-item__body { flex: 1; display: flex; flex-direction: column; }
.news-item__title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}
.news-item__desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
  flex: 1;
}
.news-item__date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 8px;
}

/* ============================================================
   认证/标准 — 图标网格
   ============================================================ */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}
.cert-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 28px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  transition: all var(--duration-normal) var(--ease-out);
}
.cert-item:hover {
  border-color: var(--border-card-hover);
  background: var(--bg-card-hover);
}
.cert-item__icon {
  font-size: 2rem;
  color: var(--tech-blue-light);
  opacity: 0.8;
}
.cert-item__name {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
}
.cert-item__desc {
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* ============================================================
   CTA 区块
   ============================================================ */
.cta-section {
  padding: 80px 0;
  text-align: center;
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-deep) 100%);
  position: relative;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--tech-blue-border), transparent);
}
.cta-section__title {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #fff;
}
.cta-section__actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 28px;
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border-subtle);
  padding: 56px 0 0;
}
.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr 1.2fr;
  gap: 40px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px 40px;
}
.footer__brand-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-top: 12px;
  max-width: 320px;
}
.footer__col-title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: 0.03em;
}
.footer__links { display: flex; flex-direction: column; gap: 8px; }
.footer__links a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color var(--duration-fast) var(--ease-out);
}
.footer__links a:hover { color: var(--tech-blue-light); }

.footer__contact-item {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.footer__contact-item i {
  color: var(--tech-blue-light);
  width: 16px;
  margin-top: 3px;
  flex-shrink: 0;
}

.footer__qrcode {
  width: 110px;
  height: 110px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.4;
}

/* 友情链接 */
.friend-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 16px 0;
  border-top: 1px solid var(--border-subtle);
}
.friend-links__label {
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
}
.friend-links a {
  font-size: 0.78rem;
  color: var(--text-muted);
  transition: color var(--duration-fast);
}
.friend-links a:hover { color: var(--tech-blue-light); }

/* 底部版权 */
.footer__bottom {
  border-top: 1px solid var(--border-subtle);
  padding: 18px 0;
}
.footer__bottom-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--text-muted);
}
.footer__bottom-inner a { color: var(--text-muted); }
.footer__bottom-inner a:hover { color: var(--tech-blue-light); }

/* ============================================================
   内页 Banner
   ============================================================ */
.inner-banner {
  position: relative;
  height: 280px;
  margin-top: var(--header-h);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.inner-banner__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}
.inner-banner__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 11, 20, 0.75), rgba(11, 26, 46, 0.9));
  z-index: 1;
}
.inner-banner__content {
  position: relative;
  z-index: 2;
  text-align: center;
}
.inner-banner__title {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}
.inner-banner__subtitle {
  font-size: 0.95rem;
  color: var(--silver-light);
  letter-spacing: 0.06em;
}

/* 面包屑 */
.breadcrumb-bar {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-subtle);
  padding: 12px 0;
}
.breadcrumb {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--tech-blue-light); }
.breadcrumb .fa-chevron-right { margin: 0 8px; font-size: 0.6rem; }

/* ============================================================
   内页布局 — 侧边栏 + 主内容
   ============================================================ */
.page-layout {
  display: flex;
  gap: 32px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 40px 20px;
}

/* 侧边栏 */
.sidebar {
  width: 240px;
  min-width: 240px;
  flex-shrink: 0;
}
.sidebar__title {
  padding: 16px 18px;
  background: var(--tech-blue);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.04em;
}
.sidebar__nav {
  border: 1px solid var(--border-subtle);
  border-top: none;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  overflow: hidden;
}
.sidebar__nav a {
  display: block;
  padding: 13px 18px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--duration-fast) var(--ease-out);
}
.sidebar__nav a:last-child { border-bottom: none; }
.sidebar__nav a:hover,
.sidebar__nav a.active {
  color: var(--tech-blue-light);
  background: var(--tech-blue-dim);
  border-left: 2px solid var(--tech-blue);
  padding-left: 16px;
}

/* 主内容区 */
.page-main {
  flex: 1;
  min-width: 0;
}

/* ============================================================
   产品列表页
   ============================================================ */
.product-list-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

/* ============================================================
   列表页筛选/排序栏
   ============================================================ */
.list-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}
.list-toolbar__count {
  font-size: 0.85rem;
  color: var(--text-muted);
}
.list-toolbar__sort {
  display: flex;
  gap: 6px;
}
.list-toolbar__sort a {
  padding: 6px 14px;
  font-size: 0.82rem;
  color: var(--text-muted);
  border-radius: var(--radius-xs);
  transition: all var(--duration-fast);
}
.list-toolbar__sort a:hover,
.list-toolbar__sort a.active {
  color: var(--tech-blue-light);
  background: var(--tech-blue-dim);
}

/* ============================================================
   产品详情页
   ============================================================ */
.detail-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.detail__gallery {
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-secondary);
}
.detail__gallery img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
}
.detail__info {}
.detail__info h1 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 16px;
}
.detail__info-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
}

/* 产品参数表 */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
}
.spec-table tr {
  border-bottom: 1px solid var(--border-subtle);
}
.spec-table td {
  padding: 12px 16px;
  font-size: 0.88rem;
}
.spec-table td:first-child {
  color: var(--text-muted);
  width: 120px;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
}
.spec-table td:last-child {
  font-family: var(--font-mono);
  color: var(--text-data);
  font-weight: 500;
}

/* 详情 Tab */
.detail-tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border-subtle);
  margin-bottom: 24px;
}
.detail-tabs button {
  padding: 12px 24px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all var(--duration-fast);
  cursor: pointer;
}
.detail-tabs button:hover { color: var(--text-secondary); }
.detail-tabs button.active {
  color: var(--tech-blue-light);
  border-bottom-color: var(--tech-blue);
}

.detail__body {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.8;
}
.detail__body img { max-width: 100%; border-radius: var(--radius-sm); margin: 16px 0; }
.detail__body p { margin-bottom: 14px; }
.detail__body h2, .detail__body h3 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  margin: 24px 0 12px;
}
.detail__body table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
}
.detail__body table td,
.detail__body table th {
  border: 1px solid var(--border-subtle);
  padding: 10px 14px;
  font-size: 0.85rem;
}
.detail__body table th {
  background: var(--bg-card);
  color: var(--text-primary);
  font-weight: 600;
}

/* 上一篇/下一篇 */
.prev-next {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
}
.prev-next a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color var(--duration-fast);
}
.prev-next a:hover { color: var(--tech-blue-light); }

/* ============================================================
   单页内容（关于我们/技术参数/联系我们）
   ============================================================ */
.page-content {
  max-width: 860px;
}
.page-content h2 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  margin: 32px 0 14px;
  color: var(--text-primary);
}
.page-content h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  margin: 24px 0 10px;
  color: var(--text-primary);
}
.page-content p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}
.page-content img {
  max-width: 100%;
  border-radius: var(--radius-sm);
  margin: 20px 0;
}

/* ============================================================
   联系我们 — 双栏布局
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}
.contact-info__item {
  display: flex;
  gap: 14px;
  margin-bottom: 24px;
}
.contact-info__icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--tech-blue-dim);
  border-radius: var(--radius-sm);
  color: var(--tech-blue-light);
  font-size: 1.05rem;
  flex-shrink: 0;
}
.contact-info__label {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 3px;
}
.contact-info__value {
  font-size: 0.92rem;
  color: var(--text-primary);
  font-weight: 500;
}

/* 联系表单卡片 */
.contact-form-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  padding: 28px;
}

/* ============================================================
   表单元素
   ============================================================ */
.form-group {
  margin-bottom: 16px;
}
.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
  letter-spacing: 0.03em;
}
.form-group .required { color: #EF4444; }

.form-control {
  width: 100%;
  padding: 11px 14px;
  font-size: 0.9rem;
  color: var(--text-primary);
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
}
.form-control:focus {
  border-color: var(--tech-blue);
  box-shadow: 0 0 0 3px var(--tech-blue-dim);
  background: rgba(255, 255, 255, 0.06);
}
.form-control::placeholder { color: var(--text-muted); }

textarea.form-control { resize: vertical; min-height: 80px; }

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238A9BB0'%3E%3Cpath d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 32px;
}

/* ============================================================
   分页
   ============================================================ */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  margin-top: 36px;
  flex-wrap: wrap;
}
.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 10px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xs);
  transition: all var(--duration-fast);
}
.pagination a:hover {
  color: var(--text-primary);
  border-color: var(--tech-blue-border);
  background: var(--tech-blue-dim);
}
.pagination .active {
  color: #fff;
  background: var(--tech-blue);
  border-color: var(--tech-blue);
}
.pagination .disabled {
  opacity: 0.35;
  pointer-events: none;
}

/* 空状态 */
.no-data {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ============================================================
   在线客服按钮
   ============================================================ */
.online-service {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 90;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--tech-blue);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  box-shadow: 0 4px 20px rgba(26, 107, 176, 0.4);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
}
.online-service:hover {
  background: var(--tech-blue-light);
  transform: scale(1.08);
  box-shadow: 0 6px 28px rgba(26, 107, 176, 0.6);
}

/* ============================================================
   返回顶部
   ============================================================ */
.back-top {
  position: fixed;
  bottom: 92px;
  right: 28px;
  z-index: 90;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-normal) var(--ease-out);
}
.back-top.visible {
  opacity: 1;
  visibility: visible;
}
.back-top:hover {
  background: var(--tech-blue);
  color: #fff;
  border-color: var(--tech-blue);
}

/* ============================================================
   搜索页
   ============================================================ */
.search-form {
  display: flex;
  gap: 10px;
  margin-bottom: 28px;
}
.search-form .form-control { flex: 1; }
.search-result-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--border-subtle);
}
.search-result-item a {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  display: block;
  margin-bottom: 6px;
}
.search-result-item a:hover { color: var(--tech-blue-light); }
.search-result-item p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ============================================================
   技术参数页面专用
   ============================================================ */
.tech-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
}
.tech-table thead th {
  background: var(--tech-blue);
  color: #fff;
  padding: 14px 16px;
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-align: left;
}
.tech-table thead th:first-child { border-radius: var(--radius-xs) 0 0 0; }
.tech-table thead th:last-child { border-radius: 0 var(--radius-xs) 0 0; }
.tech-table tbody td {
  padding: 12px 16px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-subtle);
}
.tech-table tbody td:first-child {
  font-family: var(--font-mono);
  color: var(--text-data);
  font-weight: 500;
}
.tech-table tbody tr:hover { background: var(--bg-card-hover); }

/* ============================================================
   AOS 动画微调
   ============================================================ */
[data-aos] {
  transition-timing-function: var(--ease-out);
}
[data-aos="fade-up"] {
  transform: translateY(24px);
}

/* ============================================================
   图片懒加载
   ============================================================ */
img[data-src] {
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out);
}
img[data-src].loaded {
  opacity: 1;
}

/* ============================================================
   数字滚动动画辅助
   ============================================================ */
.countup {
  display: inline-block;
}

/* ============================================================
   标签/徽章
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  border-radius: var(--radius-xs);
}
.badge--blue {
  color: var(--tech-blue-light);
  background: var(--tech-blue-dim);
}
.badge--green {
  color: #34D399;
  background: rgba(52, 211, 153, 0.1);
}
.badge--silver {
  color: var(--silver-light);
  background: var(--silver-dim);
}

/* ============================================================
   深色分隔线装饰
   ============================================================ */
.divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-card), transparent);
  margin: 40px 0;
}

/* ============================================================
   响应式 — 768px 断点
   ============================================================ */
@media (max-width: 1024px) {
  .category-grid { grid-template-columns: repeat(3, 1fr); }
  .cert-grid { grid-template-columns: repeat(3, 1fr); }
  .product-list-grid,
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .detail-layout { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  :root {
    --section-py: 56px;
    --section-py-sm: 36px;
    --header-h: 58px;
  }

  /* ===== 全局移动端修复 ===== */
  body {
    min-width: 320px;
    overflow-x: hidden;
  }
  .container {
    padding: 0 16px;
    max-width: 100%;
  }

  /* ===== 移动端导航 ===== */
  .header__inner {
    padding: 0 16px;
  }
  .header__nav { display: none; }
  .header__actions .header__cta { display: none; }
  .hamburger { display: flex; }

  /* ===== Hero ===== */
  .hero {
    height: 70vh;
    min-height: 420px;
    max-height: 600px;
  }
  .hero__content {
    width: 92%;
    padding: 0 8px;
  }
  .hero__title { font-size: 1.6rem; line-height: 1.3; }
  .hero__subtitle { font-size: 0.88rem; max-width: 100%; }
  .hero__actions { flex-direction: column; align-items: center; }

  /* ===== 区块标题居中 ===== */
  .section-header { text-align: center; margin-bottom: 36px; }
  .section-header::after { margin: 12px auto 0; }
  .section-header--left { text-align: center; }
  .section-header--left::after { margin: 12px auto 0; }
  .section-title { font-size: 1.4rem; text-align: center; }
  .section-subtitle { text-align: center; margin-left: auto; margin-right: auto; }

  /* ===== Stats ===== */
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat-item { padding: 20px 10px; }
  .stat-item__number { font-size: 1.4rem; }

  /* ===== Category ===== */
  .category-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .category-card { padding: 20px 10px; }

  /* ===== Products ===== */
  .product-list-grid,
  .product-grid { grid-template-columns: 1fr; gap: 16px; }
  .case-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }

  /* ===== News ===== */
  .news-item { flex-direction: column; gap: 12px; padding: 14px; }
  .news-item__image { width: 100%; min-width: 100%; aspect-ratio: 16/9; }

  /* ===== Footer ===== */
  .footer {
    padding: 40px 0 0;
  }
  .footer__grid { grid-template-columns: 1fr; gap: 28px; padding: 0 16px 32px; }
  .footer__bottom-inner { flex-direction: column; text-align: center; padding: 0 16px; gap: 8px; }
  .friend-links { padding: 12px 16px; justify-content: center; }

  /* ===== Inner pages ===== */
  .page-layout { flex-direction: column; padding: 24px 12px; gap: 20px; }
  .sidebar { width: 100%; min-width: 100%; }
  .inner-banner {
    height: 180px;
    margin-top: var(--header-h);
  }
  .inner-banner__title { font-size: 1.4rem; padding: 0 12px; }
  .inner-banner__subtitle { font-size: 0.85rem; padding: 0 12px; }
  .breadcrumb { padding: 0 16px; }

  /* ===== Contact ===== */
  .contact-grid { grid-template-columns: 1fr; gap: 28px; }
  .contact-form-card { padding: 20px; }
  .detail-layout { grid-template-columns: 1fr; gap: 20px; }

  /* ===== Detail pages ===== */
  .detail__info h1 { font-size: 1.3rem; }
  .detail-tabs { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .detail-tabs button { padding: 10px 16px; font-size: 0.82rem; white-space: nowrap; flex-shrink: 0; }
  .detail-tabs { display: flex; flex-wrap: nowrap; }
  .spec-table td { padding: 8px 10px; font-size: 0.8rem; }
  .spec-table td:first-child { width: 80px; }
  .prev-next { flex-direction: column; gap: 8px; }

  /* ===== Tech table ===== */
  .tech-table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .tech-table thead th,
  .tech-table tbody td { padding: 8px 10px; font-size: 0.75rem; white-space: nowrap; }

  /* ===== Buttons ===== */
  .btn--lg { padding: 12px 20px; font-size: 0.9rem; }
  .btn { font-size: 0.85rem; padding: 10px 18px; }

  /* ===== CTA ===== */
  .cta-section { padding: 56px 16px; }
  .cta-section__title { font-size: 1.4rem; }
  .cta-section__actions { flex-direction: column; align-items: center; }

  /* ===== Forms ===== */
  .form-group label { font-size: 0.8rem; }
  .form-control { padding: 10px 12px; font-size: 0.85rem; }

  /* ===== Search ===== */
  .search-form { flex-direction: column; gap: 8px; }
  .search-form .btn { width: 100%; justify-content: center; }

  /* ===== 通用居中修复 ===== */
  img, video, iframe, embed, object { max-width: 100%; height: auto; }
  table { max-width: 100%; }
  pre, code { max-width: 100%; overflow-x: auto; word-wrap: break-word; }

  /* ===== 在线客服 & 返回顶部 ===== */
  .online-service { bottom: 20px; right: 16px; width: 44px; height: 44px; font-size: 1.1rem; }
  .back-top { bottom: 76px; right: 16px; width: 36px; height: 36px; font-size: 0.75rem; }
}

@media (max-width: 480px) {
  .hero { height: 60vh; min-height: 340px; }
  .hero__title { font-size: 1.35rem; }
  .stats { grid-template-columns: 1fr 1fr; gap: 0; }
  .stat-item { padding: 16px 8px; }
  .stat-item__number { font-size: 1.2rem; }
  .category-grid { grid-template-columns: 1fr 1fr; }
  .case-grid { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .list-toolbar { flex-direction: column; align-items: stretch; }

  /* ===== 小屏导航增强 ===== */
  .header__logo-name { font-size: 0.9rem; }
  .header__logo-sub { font-size: 0.55rem; }
  .header__logo-icon { width: 32px; height: 32px; font-size: 0.9rem; }

  /* ===== 区块边距缩小 ===== */
  :root {
    --section-py: 44px;
    --section-py-sm: 28px;
  }
  .section { padding: var(--section-py) 0; }
}

/* ============================================================
   prefers-reduced-motion (可访问性)
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Dedicated phone layout, 2026-09-14; preserve desktop rules and content. */
@media(max-width:767px){
 :root{--section-py:30px;--section-py-sm:22px}
 [data-aos]{transform:none!important;opacity:1!important;transition:none!important}
 .hero{height:420px;min-height:420px}
 .hero__content{padding:90px 16px 44px}
 .hero__title{font-size:25px;line-height:1.5;margin-bottom:14px}
 .hero__subtitle{font-size:13px;line-height:1.7;margin-bottom:22px}
 .hero__actions{flex-direction:row;justify-content:center;gap:10px}
 .hero__actions .btn{min-height:44px;padding:10px 16px}
 .hero__scroll{display:none}
 .section-title{font-size:23px;line-height:1.5}
 .section-subtitle{font-size:13px;line-height:1.65}
 .section-tag{font-size:10px;margin-bottom:8px}
 .section-header{margin-bottom:22px}
 .section>.container>div[style*="margin-bottom:48px"]{margin-bottom:22px!important;gap:10px!important}
 .section>.container>div[style*="margin-bottom:48px"]>.btn{padding:8px 0;min-height:44px;font-size:12px}
 .stats{grid-template-columns:repeat(4,minmax(0,1fr));gap:0}
 .stat-item{padding:10px 3px}
 .stat-item__icon{font-size:18px;margin-bottom:8px}
 .stat-item__number{font-size:22px;line-height:1.3;margin-bottom:5px}
 .stat-item__label{font-size:10px;line-height:1.6}
 .category-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
 .category-card{padding:18px 12px}
 .category-card__icon{font-size:25px;margin-bottom:10px}
 .category-card__name{font-size:15px}.category-card__desc{font-size:11px}
 .product-grid{grid-template-columns:1fr;gap:14px}
 .product-grid>.card{display:grid;grid-template-columns:100px minmax(0,1fr);gap:12px;padding:12px;align-items:start}
 .product-grid .card__image{aspect-ratio:1;height:100px;border-radius:4px}
 .product-grid .card__image img{height:100%;object-fit:contain}
 .product-grid .card__body{padding:0;min-width:0}
 .card__title{display:block;font-size:15px;line-height:1.5;overflow-wrap:anywhere;margin-bottom:6px}
 .card__desc{font-size:12px;line-height:1.65}
 .card__tag{font-size:10px;padding:2px 7px;margin-bottom:6px}
 .card__specs{gap:8px;margin-top:8px;padding-top:8px}
 .card__spec-value{font-size:11px;overflow-wrap:anywhere;letter-spacing:0}
 .card__spec-label{font-size:10px}
 .case-grid,.product-list-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 12px}
 .case-grid .card__image,.product-list-grid .card__image{aspect-ratio:1.2}
 .case-grid .card__image img,.product-list-grid .card__image img{height:100%}
 .card__body{padding:11px}
 .product-list-grid .card__specs{grid-template-columns:1fr;gap:6px}
 .guide-section{gap:20px!important}
 .guide-image,.guide-text{min-width:0!important;flex-basis:100%!important;max-width:100%}
 .guide-image img{max-height:190px;object-fit:cover}
 .guide-text>p{font-size:13px;line-height:1.8!important;margin-bottom:14px!important}
 .cert-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
 .cert-item{padding:16px 6px}.cert-item__icon{font-size:23px;margin-bottom:8px}
 .cert-item__name{font-size:12px}.cert-item__desc{font-size:10px}
 .news-list{gap:12px}
 .news-item{flex-direction:row;gap:12px;padding:12px;align-items:flex-start}
 .news-item__image{width:86px;min-width:86px;height:90px;aspect-ratio:auto}
 .news-item__image img{height:100%}
 .news-item__body{min-width:0}.news-item__title{font-size:15px;line-height:1.5;margin-bottom:7px}
 .news-item__desc{font-size:12px;line-height:1.6}.news-item__date{font-size:10px;margin-top:7px}
 .cta-section{padding:30px 16px}.cta-section__title{font-size:24px}
 .cta-section__actions{flex-direction:row;justify-content:center;flex-wrap:wrap;gap:10px}
 .btn{min-height:44px;padding:10px 16px}
 .footer{padding-top:28px}.footer__grid{grid-template-columns:minmax(0,1fr) 110px;gap:22px 16px;padding-bottom:24px}
 .footer__grid>div:first-child,.footer__grid>div:nth-child(2){grid-column:1/-1}
 .footer__brand-desc{font-size:12px;margin:12px 0}
 .footer__col-title{font-size:14px;margin-bottom:10px}
 .footer__links{flex-direction:row;flex-wrap:wrap;gap:0 16px}
 .footer__links a{min-height:44px;display:flex;align-items:center;font-size:12px}
 .footer__contact-item{font-size:12px;gap:8px;overflow-wrap:anywhere}
 .footer__qrcode{width:100px;height:100px}
 .friend-links{font-size:11px;gap:0 14px;justify-content:flex-start}
 .friend-links a{min-height:36px;display:inline-flex;align-items:center}
 .footer__bottom-inner{font-size:11px}
 .inner-banner{height:145px}.inner-banner__title{font-size:24px}
 .page-layout{padding:0 16px;gap:22px}.page-main{min-width:0;width:100%}
 .sidebar{min-width:0;width:100%}.sidebar__title{padding:12px 14px;font-size:15px}
 .sidebar__nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}
 .sidebar__nav a{min-height:44px;padding:10px 12px;font-size:13px}
 .pagination{margin-top:24px;flex-wrap:wrap;gap:4px}.pagination a,.pagination span{min-width:44px;min-height:44px}
 .detail-layout{gap:20px}.detail__info{min-width:0}.detail__info h1{font-size:23px;overflow-wrap:anywhere}
 .detail__body{font-size:14px;line-height:1.9;min-width:0;overflow-wrap:anywhere}
 .detail__body table{display:block;overflow-x:auto;max-width:100%}
 .detail__gallery img{max-height:300px;object-fit:contain}
 .detail-tabs button{min-height:44px}.detail__params{gap:10px}
 .form-control{font-size:16px;min-width:0}
 .contact-grid{gap:24px}.contact-form-card{padding:20px 16px}
 .contact-form-card form>div[style*="grid-template-columns"]{grid-template-columns:1fr!important;gap:0!important}
 .back-top{width:44px;height:44px}
}
@media(max-width:359px){.hero__title{font-size:23px}.product-grid>.card{grid-template-columns:82px minmax(0,1fr);gap:10px;padding:10px}.product-grid .card__image{height:82px}.stat-item__number{font-size:19px}}

@media(max-width:767px){
 .inquiry-contacts{grid-template-columns:1fr!important;gap:10px!important;margin-top:22px!important}
 .inquiry-contacts>div{display:grid;grid-template-columns:32px minmax(0,1fr);gap:3px 12px;text-align:left!important;padding:12px 16px!important;min-width:0}
 .inquiry-contacts>div>i{grid-row:1/3;align-self:center;margin:0!important}
 .inquiry-contacts p{overflow-wrap:anywhere}
 .form-group>div[style*="display:flex"]{flex-wrap:wrap}
}