/**
 * 环境监测智慧环保平台 — 深蓝科技主题
 * 主色系：深蓝 #0A1628 + 科技蓝 #1A6BB0 + 亮青 #00D4FF
 * 风格：深色为主 + 毛玻璃卡片 + 数据看板排版 + 科技感
 * 纯原生 CSS，无框架依赖
 * ★ 遵守 PBootCMS 开发规范与约束 V3.6
 */

/* ===== 自托管 Inter 字体 — 现代几何无衬线，4字重 ===== */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/inter-400.ttf') format('truetype');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('../fonts/inter-500.ttf') format('truetype');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('../fonts/inter-600.ttf') format('truetype');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('../fonts/inter-700.ttf') format('truetype');
}

/* ============================================================
   CSS 变量体系
   ============================================================ */
:root {
  /* 基底色 — 深蓝暗夜 */
  --bg-deep: #0A1628;
  --bg-night: #0D1F3C;
  --bg-card: rgba(13, 31, 60, 0.7);
  --bg-card-hover: rgba(26, 107, 176, 0.15);
  --bg-input: rgba(255, 255, 255, 0.04);

  /* 主色 — 科技蓝 */
  --primary: #1A6BB0;
  --primary-hover: #2080CC;
  --primary-dim: rgba(26, 107, 176, 0.2);
  --primary-glow: rgba(26, 107, 176, 0.35);

  /* 亮青点缀 — 数据高亮 */
  --accent: #00D4FF;
  --accent-hover: #33DDFF;
  --accent-dim: rgba(0, 212, 255, 0.12);
  --accent-glow: rgba(0, 212, 255, 0.25);

  /* 辅助色 */
  --success: #00C853;
  --warning: #FFB300;
  --danger: #FF3D57;
  --white: #FFFFFF;

  /* 文字色阶 */
  --text-primary: #E8ECF4;
  --text-secondary: #8B9AB5;
  --text-muted: #4A5A78;

  /* 边框 */
  --border-subtle: rgba(26, 107, 176, 0.15);
  --border-glow: rgba(0, 212, 255, 0.2);
  --border-card: rgba(26, 107, 176, 0.25);

  /* 阴影 */
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.08);
  --shadow-blue: 0 0 40px rgba(26, 107, 176, 0.12);

  /* 圆角 — 小圆角科技感 */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  /* 间距 */
  --section-py: 90px;
  --container-max: 1200px;
  --header-h: 68px;

  /* 过渡 */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;

  /* 字体 — Inter(现代几何) + Noto Sans SC(中文优化) + JetBrains Mono(数据看板) */
  --font-heading: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', 'Consolas', monospace;
  --font-data: 'JetBrains Mono', 'Fira Code', 'SF Mono', 'Consolas', monospace;
}

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

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

body {
  background: var(--bg-deep);
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 深色背景纹理叠加 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse at 15% 20%, rgba(26, 107, 176, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse at 85% 70%, rgba(0, 212, 255, 0.05) 0%, transparent 60%),
    var(--bg-deep);
}

body::after {
  content: '';
  position: fixed;
  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;
  opacity: 0.5;
  pointer-events: none;
}

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

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

ul, ol { list-style: none; }

/* 文本选择 */
::selection { background: var(--accent-dim); color: var(--accent); }

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

/* ============================================================
   容器 & 布局工具
   ============================================================ */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

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

.section--dark {
  background: rgba(13, 31, 60, 0.5);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.section--accent-border {
  border-top: 1px solid var(--border-glow);
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); border: 0;
}

/* ============================================================
   Section Header
   ============================================================ */
.section-header {
  text-align: center;
  margin-bottom: 52px;
}

.section-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 16px;
  border: 1px solid var(--border-glow);
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: 12px;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.02rem;
  max-width: 640px;
  margin: 0 auto;
}

/* ============================================================
   按钮系统
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 26px;
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  border: none;
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.btn--primary {
  background: linear-gradient(135deg, var(--primary), #2080CC);
  color: var(--white);
  box-shadow: 0 2px 12px var(--primary-glow);
}
.btn--primary:hover {
  background: linear-gradient(135deg, #2080CC, #2A90DD);
  color: var(--white);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--primary-glow);
}

.btn--accent {
  background: linear-gradient(135deg, var(--accent), #33DDFF);
  color: var(--bg-deep);
  font-weight: 700;
  box-shadow: 0 2px 16px var(--accent-glow);
}
.btn--accent:hover {
  background: linear-gradient(135deg, #33DDFF, #66EAFF);
  color: var(--bg-deep);
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(0, 212, 255, 0.4);
}

.btn--outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.btn--outline:hover {
  background: var(--accent-dim);
  color: var(--accent-hover);
  border-color: var(--accent-hover);
}

.btn--ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}
.btn--ghost:hover {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--primary);
}

.btn--white-outline {
  background: transparent;
  color: var(--white);
  border: 1px solid rgba(255,255,255,0.3);
}
.btn--white-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.5);
  color: var(--white);
}

/* ============================================================
   Header 公共头部 — 深色毛玻璃固定
   ============================================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(10, 22, 40, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--duration-normal) var(--ease-out);
}

.header.scrolled {
  background: rgba(10, 22, 40, 0.95);
  box-shadow: 0 2px 24px rgba(0, 0, 0, 0.5);
  border-bottom-color: var(--border-glow);
}

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

/* Logo */
.header__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.header__logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--accent), var(--primary));
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.1rem;
}

.header__logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.header__logo-name {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.header__logo-sub {
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  font-family: var(--font-mono);
}

/* 主导航 */
.header__nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.header__nav-link {
  display: flex;
  align-items: center;
  padding: 8px 16px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
  text-decoration: none;
  white-space: nowrap;
}

.header__nav-link:hover,
.header__nav-link.active {
  color: var(--accent);
  background: var(--accent-dim);
}

/* 导航下拉 */
.header__nav-item {
  position: relative;
}

.header__dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 160px;
  background: rgba(13, 31, 60, 0.98);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  transform-origin: top center;
  transform: translateX(-50%) translateY(-6px);
  transition: all var(--duration-normal) var(--ease-out);
  z-index: 60;
  box-shadow: var(--shadow-card);
}

.header__nav-item:hover .header__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.header__dropdown a {
  display: block;
  padding: 9px 20px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: all var(--duration-fast);
}

.header__dropdown a:hover {
  color: var(--accent);
  background: var(--accent-dim);
}

/* 右侧操作区 */
.header__actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.header__cta {
  background: linear-gradient(135deg, var(--accent), #33DDFF);
  color: var(--bg-deep) !important;
  padding: 9px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: all var(--duration-normal) var(--ease-out);
  box-shadow: 0 2px 14px var(--accent-glow);
}

.header__cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 22px rgba(0, 212, 255, 0.4);
}

/* 汉堡菜单 — 独立在 header__actions 外 (13.4) */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  z-index: 1001;
}

.hamburger span {
  display: block;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: all var(--duration-normal) var(--ease-out);
  transform-origin: center;
}

.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* 移动端侧滑菜单 */
.mobile-nav {
  position: fixed;
  top: 0;
  right: -300px;
  width: 280px;
  height: 100%;
  z-index: 999;
  background: rgba(10, 22, 40, 0.98);
  backdrop-filter: blur(24px);
  border-left: 1px solid var(--border-subtle);
  transition: right var(--duration-slow) var(--ease-out);
  overflow-y: auto;
  padding: 80px 20px 40px;
}

.mobile-nav.open { right: 0; }

.mobile-nav__link {
  display: block;
  padding: 12px 0;
  font-size: 1rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-subtle);
  transition: color var(--duration-fast);
}
.mobile-nav__link:hover { color: var(--accent); }

.mobile-nav__sub {
  display: none;
  padding: 4px 0 8px 16px;
}

.mobile-nav__sub.open { display: block; }

.mobile-nav__sub a {
  display: block;
  padding: 8px 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.mobile-nav__overlay {
  position: fixed;
  inset: 0;
  z-index: 998;
  background: rgba(0,0,0,0.6);
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-normal);
}

.mobile-nav__overlay.show { opacity: 1; visibility: visible; }

/* ============================================================
   Footer 公共底部
   ============================================================ */
.footer {
  background: #060E1A;
  border-top: 1px solid var(--border-subtle);
  position: relative;
}

.footer__top-line {
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), var(--primary), transparent);
  opacity: 0.4;
}

.footer__grid {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 56px 24px 40px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr 1fr;
  gap: 40px;
}

.footer__brand-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.footer__social {
  display: flex;
  gap: 10px;
}

.footer__social a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xs);
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: all var(--duration-fast);
}

.footer__social a:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

.footer__col-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.footer__col-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 28px;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__links a {
  color: var(--text-muted);
  font-size: 0.88rem;
  transition: all var(--duration-fast);
}

.footer__links a:hover { color: var(--accent); padding-left: 4px; }

.footer__contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 0.86rem;
  color: var(--text-muted);
}

.footer__contact-item i {
  color: var(--accent);
  margin-top: 4px;
  flex-shrink: 0;
}

.footer__qrcode {
  width: 100px;
  height: 100px;
  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: 1.5;
}

.friend-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 20px 0;
  border-top: 1px solid var(--border-subtle);
}

.friend-links__label {
  font-size: 0.82rem;
  color: var(--text-muted);
  flex-shrink: 0;
}

.friend-links a {
  font-size: 0.8rem;
  color: var(--text-muted);
  transition: color var(--duration-fast);
}
.friend-links a:hover { color: var(--accent); }

.footer__bottom {
  border-top: 1px solid var(--border-subtle);
}

.footer__bottom-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer__bottom-inner a {
  color: var(--text-muted);
  font-size: 0.8rem;
}
.footer__bottom-inner a:hover { color: var(--accent); }

/* 返回顶部 */
.back-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--primary);
  border: none;
  color: var(--white);
  font-size: 1rem;
  cursor: pointer;
  z-index: 800;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--duration-normal) var(--ease-out);
  box-shadow: 0 2px 12px var(--primary-glow);
}

.back-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-top:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
}

/* ============================================================
   Hero Banner 区
   ============================================================ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-swiper {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__slide {
  width: 100%;
  height: 100vh;
  min-height: 600px;
  background-size: cover;
  background-position: center;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, rgba(10,22,40,0.7) 0%, rgba(10,22,40,0.5) 50%, var(--bg-deep) 100%);
}

.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 840px;
  padding: 0 24px;
}

.hero__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 6px 18px;
  border-radius: 20px;
  margin-bottom: 24px;
  border: 1px solid var(--border-glow);
  animation: fadeInDown 0.8s var(--ease-out);
}

.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4.5vw, 3.5rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: 0.02em;
  animation: fadeInUp 0.8s 0.15s both var(--ease-out);
}

.hero__title span { color: var(--accent); }

.hero__subtitle {
  font-size: 1.08rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 36px;
  line-height: 1.7;
  animation: fadeInUp 0.8s 0.3s both var(--ease-out);
}

.hero__actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s 0.45s both var(--ease-out);
}

.hero-pagination {
  position: absolute;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  gap: 8px;
}

.hero-pagination .swiper-pagination-bullet {
  width: 10px;
  height: 10px;
  background: rgba(255,255,255,0.3);
  opacity: 1;
  border-radius: 50%;
  transition: all var(--duration-normal);
}

.hero-pagination .swiper-pagination-bullet-active {
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
}

.hero__scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  animation: float 2s ease-in-out infinite;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}

/* ============================================================
   内页 Banner
   ============================================================ */
.inner-banner {
  position: relative;
  height: 320px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: var(--header-h);
}

.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(10,22,40,0.8) 0%, rgba(10,22,40,0.65) 100%);
}

.inner-banner__content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 24px;
}

.inner-banner__title {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 8px;
}

.inner-banner__subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
}

/* 内页 Banner 变体 — 原先内联在模板里, 抽成类手机端才改得动高度 */
.inner-banner--lg { height: 300px; }
.inner-banner--md { height: 280px; }

/* 面包屑 */
.breadcrumb-bar {
  background: var(--bg-night);
  border-bottom: 1px solid var(--border-subtle);
}

.breadcrumb {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 14px 24px;
  font-size: 0.84rem;
  color: var(--text-muted);
}

.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb i { font-size: 0.65rem; margin: 0 8px; color: var(--text-muted); }

/* ============================================================
   数据统计区 (Homepage Stats)
   ============================================================ */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-item {
  text-align: center;
  padding: 36px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--duration-normal);
}

.stat-item:hover {
  border-color: var(--border-glow);
  transform: translateY(-2px);
  box-shadow: var(--shadow-blue);
}

.stat-item:hover::before { opacity: 1; }

.stat-item__number {
  font-family: var(--font-data);
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.1;
  margin-bottom: 8px;
}

.stat-item__label {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ============================================================
   毛玻璃卡片系统
   ============================================================ */
.card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out);
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.card:hover {
  border-color: var(--border-glow);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5), var(--shadow-blue);
  background: var(--bg-card-hover);
}

.card__image {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--bg-night);
}

.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;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card__tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 3px 10px;
  border-radius: 12px;
  margin-bottom: 10px;
  width: fit-content;
  font-family: var(--font-mono);
}

.card__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
  margin-bottom: 8px;
}

.card__desc {
  font-size: 0.86rem;
  color: var(--text-muted);
  line-height: 1.6;
  flex: 1;
}

.card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 12px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.card__meta i { color: var(--accent); margin-right: 4px; }

.card__price {
  font-family: var(--font-data);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent);
  margin-top: 12px;
}

/* 设备卡片变体 */
.card--device .card__params {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.card--device .card__param-tag {
  font-size: 0.72rem;
  padding: 3px 10px;
  background: var(--primary-dim);
  color: var(--primary);
  border-radius: 4px;
  font-family: var(--font-mono);
}

/* ============================================================
   列表网格 (13.24: 容器在循环外)
   ============================================================ */
.list-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

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

/* ============================================================
   设备分类卡片 (Homepage)
   ============================================================ */
.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.category-card {
  text-align: center;
  padding: 36px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: all var(--duration-normal) var(--ease-out);
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.category-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 10%;
  width: 80%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--duration-normal);
}

.category-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-3px);
  box-shadow: var(--shadow-blue);
  background: var(--bg-card-hover);
}
.category-card:hover::after { opacity: 1; }

.category-card__icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 16px;
  background: var(--accent-dim);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--accent);
  transition: all var(--duration-normal);
}

.category-card:hover .category-card__icon {
  background: var(--accent);
  color: var(--bg-deep);
  box-shadow: 0 0 24px var(--accent-glow);
}

.category-card__name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.category-card__count {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* 分类卡片色彩区分 — 空气质量/水质/噪声/综合 */
.cat-1 .category-card__icon { background: rgba(0, 212, 255, 0.18); color: #00D4FF; }
.cat-2 .category-card__icon { background: rgba(0, 180, 255, 0.18); color: #00B4FF; }
.cat-3 .category-card__icon { background: rgba(255, 180, 0, 0.18); color: #FFB300; }
.cat-4 .category-card__icon { background: rgba(0, 200, 83, 0.18); color: #00C853; }
.cat-1:hover .category-card__icon { background: #00D4FF; }
.cat-2:hover .category-card__icon { background: #00B4FF; }
.cat-3:hover .category-card__icon { background: #FFB300; }
.cat-4:hover .category-card__icon { background: #00C853; }

/* ============================================================
   解决方案卡片 (Homepage)
   ============================================================ */
.solution-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.solution-card {
  display: flex;
  gap: 20px;
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: all var(--duration-normal) var(--ease-out);
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.solution-card:hover {
  border-color: var(--border-glow);
  transform: translateX(4px);
  box-shadow: var(--shadow-blue);
}

.solution-card__icon {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  background: var(--accent-dim);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--accent);
}

.solution-card__name {
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.solution-card__desc {
  font-size: 0.86rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ============================================================
   平台展示区 (Homepage)
   ============================================================ */
.platform-showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.platform-showcase__img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-card);
  position: relative;
}

.platform-showcase__img::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 60px rgba(0, 212, 255, 0.05);
}

.platform-showcase__img img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
}

.platform-feature {
  display: flex;
  gap: 14px;
  margin-bottom: 20px;
  padding: 16px;
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast);
}

.platform-feature:hover {
  background: var(--bg-card);
  border-left: 2px solid var(--accent);
}

.platform-feature__icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  background: var(--accent-dim);
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 0.95rem;
}

.platform-feature__name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.platform-feature__desc {
  font-size: 0.84rem;
  color: var(--text-muted);
}

/* ============================================================
   CTA 区域
   ============================================================ */
.cta-section {
  background: linear-gradient(135deg, rgba(26, 107, 176, 0.1), rgba(0, 212, 255, 0.05));
  border-top: 1px solid var(--border-glow);
  border-bottom: 1px solid var(--border-glow);
  padding: 72px 0;
  text-align: center;
}

.cta-section__title {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 12px;
}

/* ============================================================
   分页 (13.24: 分页在循环外)
   ============================================================ */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  margin-top: 48px;
}

.pagination a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.88rem;
  transition: all var(--duration-fast);
}

.pagination a:hover,
.pagination a.active {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--white);
}

.pagination span {
  color: var(--text-muted);
  padding: 0 4px;
}

/* ============================================================
   空状态
   ============================================================ */
.empty-state {
  text-align: center;
  padding: 60px 24px;
  color: var(--text-muted);
}

.empty-state i {
  font-size: 2.5rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  display: block;
  opacity: 0.4;
}

.empty-state p {
  font-size: 0.95rem;
}

/* ============================================================
   详情页
   ============================================================ */
.detail {
  max-width: 900px;
  margin: 0 auto;
}

.detail-gallery {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 32px;
  border: 1px solid var(--border-subtle);
}

.detail-gallery img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.detail__header {
  margin-bottom: 24px;
}

.detail__title {
  font-family: var(--font-heading);
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.4;
}

.detail__meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.84rem;
  color: var(--text-muted);
}

.detail__meta-row i { color: var(--accent); margin-right: 4px; }

/* 参数卡片 (设备详情) */
.detail__params {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.detail__param {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: center;
}

.detail__param-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.detail__param-value {
  font-family: var(--font-data);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* 正文区 */
.detail__body {
  color: var(--text-secondary);
  line-height: 1.9;
  font-size: 0.95rem;
}

.detail__body img {
  border-radius: var(--radius-md);
  margin: 20px auto;
}

.detail__body p { margin-bottom: 16px; }
.detail__body h2 { color: var(--text-primary); font-size: 1.3rem; margin: 32px 0 16px; }
.detail__body h3 { color: var(--text-primary); font-size: 1.1rem; margin: 24px 0 12px; }
.detail__body ul, .detail__body ol { margin: 0 0 16px 24px; }
.detail__body li { margin-bottom: 6px; list-style: disc; }

/* 上下篇 */
.detail__pager {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  margin-top: 40px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.88rem;
  color: var(--text-muted);
}

.detail__pager a { color: var(--accent); }
.detail__pager a:hover { color: var(--accent-hover); }

/* Tab 切换 (设备详情) */
.detail-tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border-subtle);
  margin-bottom: 28px;
}

.detail-tabs button {
  padding: 12px 28px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  transition: all var(--duration-fast);
}

.detail-tabs button.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.tab-panel { display: block; }
.tab-panel.hidden { display: none; }

/* 相关推荐 */
.related-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 48px 0 24px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

/* ============================================================
   联系我们页
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-info__item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  padding: 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast);
}

.contact-info__item:hover {
  border-color: var(--border-glow);
  background: var(--bg-card-hover);
}

.contact-info__icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  background: var(--accent-dim);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--accent);
}

.contact-info__label {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 2px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.contact-info__value {
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 500;
}

.contact-form-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.required { color: var(--danger); }

.form-control {
  width: 100%;
  padding: 11px 14px;
  font-size: 0.9rem;
  font-family: var(--font-body);
  color: var(--text-primary);
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast);
  outline: none;
}

.form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.form-control::placeholder { color: var(--text-muted); }

textarea.form-control { resize: vertical; min-height: 120px; }

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3csvg viewBox='0 0 16 16' fill='%234A5A78' xmlns='http://www.w3.org/2000/svg'%3e%3cpath d='M8 10L4 6h8z'/%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

/* ============================================================
   搜索页
   ============================================================ */
.search-box {
  padding: 40px 0;
}

.search-form-row {
  display: flex;
  gap: 12px;
  max-width: 640px;
  margin: 0 auto;
}

.search-input-wrap {
  flex: 1;
  position: relative;
}

.search-input-wrap i {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.9rem;
  pointer-events: none;
}

.search-input-wrap input {
  width: 100%;
  padding: 12px 16px 12px 40px;
  font-size: 0.95rem;
  font-family: var(--font-body);
  color: var(--text-primary);
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  outline: none;
  transition: all var(--duration-fast);
}

.search-input-wrap input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.search-result-item {
  display: flex;
  gap: 20px;
  padding: 20px;
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--duration-fast);
  text-decoration: none;
  color: inherit;
}

.search-result-item:hover { background: var(--bg-card); }

.search-result-item__thumb {
  width: 120px;
  height: 80px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-night);
}

.search-result-item__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.search-result-item__info { flex: 1; }

.search-result-item__title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.search-result-item__date {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.search-result-item__desc {
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ============================================================
   列表页头部
   ============================================================ */
.list-header {
  text-align: center;
  margin-bottom: 40px;
}

.list-header h1 {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

/* 子栏目过滤栏 */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 14px 0;
}

.filter-bar a {
  padding: 8px 20px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 20px;
  transition: all var(--duration-fast);
  text-decoration: none;
}

.filter-bar a:hover,
.filter-bar a.active {
  color: var(--accent);
  background: var(--accent-dim);
}

/* ============================================================
   新闻列表（图文交替）
   ============================================================ */
.news-item {
  display: flex;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--duration-fast);
  text-decoration: none;
  color: inherit;
}

.news-item:hover { padding-left: 8px; }

.news-item__thumb {
  width: 200px;
  height: 140px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-night);
}

.news-item__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.news-item__info { flex: 1; }

.news-item__title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.4;
}

.news-item__date {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.news-item__desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ============================================================
   留言咨询页
   ============================================================ */
.inquiry-form-card {
  max-width: 640px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px;
}

/* 留言列表 */
.message-item {
  padding: 20px;
  margin-bottom: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.message-item__header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.message-item__content {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
}

.message-item__reply {
  margin-top: 12px;
  padding: 12px 16px;
  background: var(--accent-dim);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  color: var(--accent);
  border-left: 2px solid var(--accent);
}

/* ============================================================
   在线客服按钮
   ============================================================ */
.online-service {
  position: fixed;
  bottom: 90px;
  right: 30px;
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.3rem;
  cursor: pointer;
  z-index: 800;
  box-shadow: 0 4px 20px var(--accent-glow);
  transition: all var(--duration-normal) var(--ease-out);
  border: none;
  animation: pulse 2.5s ease-in-out infinite;
}

.online-service:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 28px rgba(0, 212, 255, 0.4);
}

/* ============================================================
   动画关键帧
   ============================================================ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-24px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(-8px); }
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 4px 20px var(--accent-glow); }
  50% { box-shadow: 0 4px 32px rgba(0, 212, 255, 0.5); }
}

@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}

@keyframes scan-line {
  0% { transform: translateY(-100%); }
  100% { transform: translateY(100%); }
}

/* 数据流动画线条 */
.data-flow {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
}

.data-flow::after {
  content: '';
  position: absolute;
  top: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.3;
  animation: scan-line 3s linear infinite;
}

/* 文字渐变闪烁 */
.text-shimmer {
  background: linear-gradient(90deg, var(--white) 0%, var(--accent) 50%, var(--white) 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 4s linear infinite;
}

/* ============================================================
   结构辅助类
   这些样式原先内联在模板里, 抽成类是为了让手机端媒体查询能覆盖到
   (内联样式优先级高于媒体查询, 留在模板里手机端就改不动)
   ============================================================ */

/* 左标题 + 右侧入口按钮 */
.section-bar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 48px;
}
.section-bar--tight { margin-bottom: 40px; }

/* 列表页吸顶过滤栏 */
.filter-bar-sticky {
  background: var(--bg-night);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: var(--header-h);
  z-index: 40;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

/* 留言页 表单 + 近期留言 两列 */
.inquiry-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

/* 页脚品牌区 */
.footer__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer__brand-name {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  display: block;
  line-height: 1.2;
}
.footer__brand-sub {
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}
.footer__contact-note {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 10px;
}

/* 页脚手风琴箭头 — 仅手机端出现 */
.footer__col-chevron { display: none; }

/* 手机端底部操作条 — 仅手机端出现 */
.action-bar { display: none; }

/* 横向吸附轨道 — PC 上就是普通网格 */
.list-grid--rail { grid-template-columns: repeat(3, 1fr); }
.list-grid--rail.list-grid--4 { grid-template-columns: repeat(4, 1fr); }

/* 移动端抽屉顶部品牌 */
.mobile-nav__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
}
.mobile-nav__brand-name {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}
.mobile-nav__link--toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.mobile-nav__link--toggle i {
  font-size: 0.65rem;
  color: var(--text-muted);
}
.mobile-nav__cta {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
}
.mobile-nav__cta .btn {
  width: 100%;
  justify-content: center;
}

/* AOS 动画微调 */
[data-aos] { transition-timing-function: var(--ease-out) !important; }

/* 列表下方「查看全部」按钮 — 原先内联 display:none, 内联样式会压过媒体查询 */
.show-mobile { display: none; text-align: center; margin-top: 28px; }

/* PC端隐藏移动端按钮 */
@media (min-width: 1025px) { .show-mobile { display: none !important; } }

/* ============================================================
   响应式 — 平板 (768px — 1024px)
   ============================================================ */
@media (max-width: 1024px) {
  :root { --section-py: 64px; }

  .header__nav { display: none; }
  .hamburger { display: flex; }
  .hide-mobile { display: none !important; }
  .show-mobile { display: block; }

  .stats { grid-template-columns: repeat(2, 1fr); }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .solution-grid { grid-template-columns: 1fr; }
  .platform-showcase { grid-template-columns: 1fr; gap: 32px; }
  .list-grid,
  .list-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .detail__params { grid-template-columns: repeat(2, 1fr); }
  .related-grid { grid-template-columns: repeat(2, 1fr); }

  .hero { height: 70vh; min-height: 480px; }
  .hero__slide { height: 70vh; min-height: 480px; }
  .inner-banner { height: 240px; }

  .news-item { flex-direction: column; }
  .news-item__thumb { width: 100%; height: 200px; }

  /* 平板也是触屏: 页脚链接与分页在平板仍常显, 需要足够触控高度 */
  .footer__links a { display: flex; align-items: center; min-height: 44px; padding-left: 0; }
  .footer__links a:hover { padding-left: 0; }
  .footer__social a { width: 44px; height: 44px; }
  .pagination a,
  .pagination span { min-width: 42px; height: 44px; }
}

/* ============================================================
   响应式 — 手机 (≤ 768px)
   手机端按使用习惯重新排版，而不是把 PC 版等比压扁：
   横向吸附轨道 / 2 列紧凑网格 / 左图右文列表 / 田字格数据卡 /
   页脚手风琴 + 底部固定操作条
   ============================================================ */
@media (max-width: 768px) {
  :root {
    --section-py: 48px;
    --header-h: 60px;
    --radius-md: 8px;
    --radius-lg: 10px;
  }

  /* 防止任何元素超出屏幕导致左偏 */
  html, body { max-width: 100vw; overflow-x: hidden; }

  /* 底部固定操作条留位 + iOS 安全区 */
  body {
    font-size: 16px;
    /* 不写 line-height: PC 端 1.75 在深色正文里是合适的 */
    padding-bottom: calc(58px + env(safe-area-inset-bottom));
  }

  /* body::after 的网格纹理在手机上太密, 降一档 */
  body::after { background-size: 30px 30px; opacity: 0.3; }

  .container { padding: 0 16px; width: 100%; max-width: 100%; }

  .section { width: 100%; }
  .section-header { margin-bottom: 30px; }

  /* 标题降一档, 才能在「排版强调 + 内容」同一屏里不显得头重脚轻 */
  .section-title { font-size: 1.4rem; line-height: 1.35; margin-bottom: 8px; }
  .section-subtitle { font-size: 0.9rem; line-height: 1.7; }
  .section-tag { font-size: 0.68rem; padding: 4px 12px; margin-bottom: 12px; }

  /* 触控目标一律不小于 44px */
  .btn { min-height: 44px; padding: 12px 20px; font-size: 0.9rem; }

  /* 左标题 + 右侧入口：文字列吃掉剩余宽度, 按钮固定不压缩 */
  .section-bar {
    align-items: center;
    flex-wrap: nowrap;
    gap: 10px;
    margin-bottom: 26px;
  }
  .section-bar--tight { margin-bottom: 22px; }
  .section-bar > div { flex: 1; min-width: 0; }
  .section-bar .section-tag { margin-bottom: 8px; }
  .section-bar .btn {
    padding: 9px 12px;
    font-size: 0.76rem;
    flex-shrink: 0;
    min-height: 40px;
  }
  .section-bar .btn i { display: none; }

  /* ---------- 顶部导航 ---------- */
  .header__inner { padding: 0 12px; gap: 8px; }
  .header__logo { min-height: 44px; }
  .header__logo-icon { width: 40px; height: 40px; }
  .header__logo-name { font-size: 0.95rem; }
  .header__logo-sub { font-size: 0.52rem; letter-spacing: 0.12em; }
  .header__cta { padding: 8px 12px; font-size: 0.78rem; min-height: 40px; }
  .hamburger { width: 44px; height: 44px; }

  /* ---------- 侧滑菜单 ---------- */
  .mobile-nav__brand { min-height: 44px; }
  .mobile-nav__link { padding: 15px 0; min-height: 48px; display: flex; align-items: center; }
  .mobile-nav__sub a { padding: 12px 0; min-height: 44px; display: flex; align-items: center; }
  .mobile-nav__cta .btn { width: 100%; justify-content: center; }

  /* ---------- 内页 Banner + 面包屑 ---------- */
  .inner-banner,
  .inner-banner--lg,
  .inner-banner--md { height: 160px; margin-top: 60px; width: 100%; }
  .inner-banner__title { font-size: 1.4rem; }
  .inner-banner__subtitle { font-size: 0.86rem; }
  .inner-banner__content { padding: 0 20px; }

  .breadcrumb { padding: 11px 16px; font-size: 0.76rem; overflow-x: auto; white-space: nowrap; scrollbar-width: none; }
  .breadcrumb::-webkit-scrollbar { display: none; }
  .breadcrumb i { margin: 0 6px; }

  /* ---------- Hero ---------- */
  /* svh 避免地址栏收放导致高度跳变, vh 兜底 */
  .hero { height: 74vh; height: 74svh; min-height: 440px; max-height: 620px; width: 100%; }
  .hero__slide { height: 100%; min-height: 0; }
  .hero__content { width: 100%; max-width: 100%; padding: 0 20px; text-align: center; }
  .hero__tag { font-size: 0.78rem; letter-spacing: 0.06em; margin-bottom: 14px; }
  .hero__title { font-size: 1.7rem; line-height: 1.3; margin-bottom: 12px; }
  .hero__subtitle { font-size: 0.92rem; line-height: 1.7; margin-bottom: 24px; }
  /* 首屏按钮改两列：主按钮占满一行, 次按钮并排, 不再三个堆成一柱 */
  .hero__actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    width: 100%;
  }
  .hero__actions .btn { width: 100%; justify-content: center; padding: 12px 10px; font-size: 0.84rem; }
  .hero__actions .btn:first-child { grid-column: 1 / -1; }
  /* 滚动提示与分页点/按钮打架, 手机端直接去掉 */
  .hero__scroll-indicator { display: none; }
  .hero-pagination { bottom: 20px; }
  .hero-pagination .swiper-pagination-bullet { width: 8px; height: 8px; }

  /* ---------- 实时数据：田字格 ---------- */
  .stats {
    grid-template-columns: 1fr 1fr;
    gap: 0;
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    overflow: hidden;
  }
  .stat-item {
    padding: 20px 10px;
    border-right: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    border-radius: 0;
    background: none;
  }
  .stat-item:nth-child(2n) { border-right: none; }
  .stat-item:nth-child(n+3) { border-bottom: none; }
  .stat-item:hover { transform: none; box-shadow: none; border-color: var(--border-subtle); }
  .stat-item::before { display: none; }
  .stat-item__number { font-size: 1.7rem; margin-bottom: 4px; }
  .stat-item__label { font-size: 0.8rem; }

  /* ---------- 设备分类：2 列紧凑 ---------- */
  .category-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .category-card { padding: 18px 10px; }
  .category-card:hover { transform: none; }
  .category-card__icon { width: 42px; height: 42px; font-size: 1.1rem; margin-bottom: 10px; }
  .category-card__name { font-size: 0.94rem; }
  .category-card__count { font-size: 0.76rem; }

  /* ---------- 卡片网格：2 列 ---------- */
  .list-grid,
  .list-grid--2,
  .list-grid--4 { grid-template-columns: 1fr 1fr; gap: 12px; }

  .card__image { aspect-ratio: 4 / 3; }
  .card__body { padding: 12px; }
  .card__tag { font-size: 0.64rem; padding: 2px 7px; margin-bottom: 6px; }
  .card__title {
    font-size: 0.86rem;
    line-height: 1.45;
    margin-bottom: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .card__desc {
    font-size: 0.76rem;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .card--device .card__params { gap: 4px; margin-top: 8px; }
  .card--device .card__param-tag { font-size: 0.6rem; padding: 2px 6px; }
  /* 两列窄卡里三个参数标签会折成三行, 卡片高度参差不齐, 只留前两个 */
  .list-grid:not(.list-grid--rail) .card--device .card__param-tag:nth-child(n+3) { display: none; }

  /* ---------- 横向吸附轨道 ---------- */
  .list-grid--rail {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    /* 负边距出血, 卡片可以滑到屏幕边缘 */
    margin: 0 -16px;
    padding: 2px 16px 14px;
  }
  .list-grid--rail::-webkit-scrollbar { display: none; }
  .list-grid--rail > * { flex: 0 0 72%; max-width: 72%; scroll-snap-align: start; }
  .list-grid--rail .card__image { aspect-ratio: 16 / 10; }

  /* 「查看全部」入口 */
  .show-mobile { display: block; margin-top: 22px; }
  .show-mobile .btn { width: 100%; justify-content: center; }

  /* ---------- 解决方案卡片 ---------- */
  .solution-card { padding: 18px 16px; flex-direction: column; gap: 12px; }
  .solution-card:hover { transform: none; }
  .solution-card__icon { width: 44px; height: 44px; font-size: 1.1rem; }
  .solution-card__name { font-size: 1.05rem; }
  .solution-card__desc { font-size: 0.84rem; line-height: 1.65; }

  /* ---------- 数据平台 ---------- */
  .platform-showcase { gap: 24px; }
  .platform-showcase__img { border-radius: var(--radius-md); }
  .platform-feature { padding: 12px; gap: 12px; }
  .platform-feature__icon { width: 38px; height: 38px; font-size: 0.95rem; }
  .platform-feature__name { font-size: 0.94rem; }
  .platform-feature__desc { font-size: 0.8rem; line-height: 1.6; }

  /* ---------- 新闻：左图右文 ---------- */
  .news-item {
    flex-direction: row;
    align-items: flex-start;
    gap: 12px;
    padding: 12px;
    border-radius: var(--radius-md);
  }
  .news-item:hover { padding-left: 12px; }
  .news-item__thumb { width: 108px; height: 108px; flex-shrink: 0; border-radius: var(--radius-sm); }
  .news-item__title { font-size: 0.92rem; line-height: 1.45; margin-bottom: 6px; }
  .news-item__date { font-size: 0.76rem; margin-bottom: 4px; }
  .news-item__desc {
    font-size: 0.78rem;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  /* ---------- 详情页 ---------- */
  .detail { width: 100%; }
  .detail-gallery { border-radius: var(--radius-md); }
  .detail__title { font-size: 1.24rem; line-height: 1.4; }
  .detail__header { text-align: left; }
  .detail__meta-row { justify-content: flex-start; gap: 8px 14px; font-size: 0.78rem; }

  /* 四格参数在手机上读不下, 改成一行一组的键值对 */
  .detail__params { grid-template-columns: 1fr; gap: 0; margin-bottom: 24px; }
  .detail__param {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
    padding: 13px 0;
    background: none;
    border: none;
    border-bottom: 1px solid var(--border-subtle);
    border-radius: 0;
    text-align: left;
  }
  .detail__param:first-child { border-top: 1px solid var(--border-subtle); }
  .detail__param-label { font-size: 0.82rem; margin-bottom: 0; flex-shrink: 0; }
  .detail__param-value { font-size: 0.88rem; text-align: right; word-break: break-word; }

  .detail__body { font-size: 1rem; line-height: 1.85; }
  .detail__body h2 { font-size: 1.15rem; margin: 24px 0 12px; }
  .detail__body h3 { font-size: 1.02rem; margin: 20px 0 10px; }
  .detail__pager { flex-direction: column; align-items: flex-start; gap: 2px; font-size: 0.84rem; }
  .detail__pager a { display: inline-flex; align-items: center; min-height: 44px; }
  .related-grid { grid-template-columns: 1fr; }

  .detail-tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    margin: 0 -16px;
    padding: 0 16px;
  }
  .detail-tabs::-webkit-scrollbar { display: none; }
  .detail-tabs button { padding: 12px 14px; font-size: 0.84rem; white-space: nowrap; flex-shrink: 0; min-height: 44px; }

  /* ---------- 列表页头 + 过滤栏 ---------- */
  .list-header { padding: 0; margin-bottom: 24px; }
  .list-header h1 { font-size: 1.45rem; }

  .filter-bar {
    flex-wrap: nowrap;
    gap: 8px;
    overflow-x: auto;
    scrollbar-width: none;
    margin: 0 -16px;
    padding: 12px 16px;
  }
  .filter-bar::-webkit-scrollbar { display: none; }
  .filter-bar a {
    flex-shrink: 0;
    min-height: 40px;
    display: inline-flex;
    align-items: center;
    padding: 0 14px;
    font-size: 0.82rem;
    white-space: nowrap;
  }

  /* ---------- 联系 / 留言 ---------- */
  .contact-grid { grid-template-columns: 1fr; gap: 28px; }
  .inquiry-grid { grid-template-columns: 1fr; gap: 32px; }
  .contact-info__item { padding: 14px; border-radius: var(--radius-md); }
  .contact-info__value { font-size: 0.92rem; }
  .contact-form-card,
  .inquiry-form-card { padding: 20px 16px; border-radius: var(--radius-md); }
  .form-group { margin-bottom: 16px; }
  /* 16px 是 iOS Safari 聚焦不自动放大的门槛 */
  .form-control { font-size: 16px; padding: 12px 14px; min-height: 46px; }
  textarea.form-control { min-height: 120px; }

  .message-item { margin-left: 0; margin-right: 0; padding: 14px; border-radius: var(--radius-md); }
  .message-item__header { font-size: 0.8rem; flex-wrap: wrap; gap: 4px; }
  .message-item__content { font-size: 0.88rem; }
  .message-item__reply { font-size: 0.84rem; }

  /* ---------- 搜索 ---------- */
  .search-box { padding: 18px 16px; border-radius: var(--radius-md); }
  .search-box h1 { font-size: 1.4rem !important; margin-bottom: 18px !important; }
  .search-form-row { flex-direction: column; gap: 10px; }
  .search-input-wrap { width: 100%; min-width: 0; }
  .search-input-wrap input { font-size: 16px; min-height: 46px; width: 100%; min-width: 0; max-width: 100%; }
  .search-form-row .btn { width: 100%; justify-content: center; }

  .search-result-item {
    flex-direction: row;
    align-items: flex-start;
    gap: 12px;
    padding: 12px;
    border-radius: var(--radius-md);
  }
  .search-result-item__thumb { width: 100px; height: 100px; flex-shrink: 0; border-radius: var(--radius-sm); }
  .search-result-item__title { font-size: 0.92rem; line-height: 1.45; }
  .search-result-item__date { font-size: 0.76rem; }
  .search-result-item__desc {
    font-size: 0.78rem;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  /* ---------- CTA ---------- */
  .cta-section { padding: 48px 0 56px; }
  .cta-section__title { font-size: 1.38rem; line-height: 1.4; }
  .cta-section .btn { width: 100%; justify-content: center; }
  .cta-section .btn--accent { font-size: 1rem !important; padding: 14px 20px !important; }

  /* ---------- 分页 ---------- */
  .pagination { flex-wrap: wrap; justify-content: center; gap: 6px; margin-top: 30px; }
  .pagination a,
  .pagination span { min-width: 42px; height: 44px; padding: 0 10px; font-size: 0.82rem; white-space: nowrap; }

  .empty-state { padding: 48px 16px; }

  /* ---------- 页脚：手风琴 ---------- */
  .footer__grid { grid-template-columns: 1fr; gap: 0; }
  .footer__brand-col { padding-bottom: 20px; }
  .footer__brand { min-height: 44px; margin-bottom: 12px; }
  .footer__brand-desc { font-size: 0.84rem; line-height: 1.7; }
  .footer__social a { width: 44px; height: 44px; font-size: 1.05rem; }

  .footer__col { border-top: 1px solid var(--border-subtle); }
  .footer__col-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 0;
    padding: 15px 0;
    font-size: 0.98rem;
    min-height: 52px;
    cursor: pointer;
  }
  .footer__col-title::after { display: none; }
  .footer__col-chevron {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
    transition: transform var(--duration-normal) var(--ease-out);
  }
  .footer__col.is-open .footer__col-chevron { transform: rotate(180deg); color: var(--accent); }
  /* 无 JS 时全部展开, 内容不会不可达 */
  .js .footer__col-body { display: none; }
  .js .footer__col.is-open .footer__col-body { display: block; }
  .footer__col-body { padding-bottom: 6px; }

  .footer__links { gap: 0; }
  .footer__links a { display: flex; align-items: center; min-height: 44px; font-size: 0.88rem; padding-left: 0; }
  .footer__links a:hover { padding-left: 0; }
  .footer__contact-item { min-height: 44px; align-items: center; margin-bottom: 0; font-size: 0.84rem; }
  .footer__qrcode { width: 108px; height: 108px; }
  .footer__contact-note { font-size: 0.8rem; }

  .friend-links { justify-content: flex-start; gap: 6px 12px; font-size: 0.78rem; }
  .friend-links a { font-size: 0.78rem; }
  .footer__bottom { padding: 18px 0 calc(18px + env(safe-area-inset-bottom)); }
  .footer__bottom-inner { flex-direction: column; text-align: center; justify-content: center; gap: 8px; font-size: 0.76rem; }

  /* 悬浮客服/返回顶部被底部操作条取代, 避免两个悬浮层互相压 */
  .back-top,
  .online-service { display: none; }

  /* ---------- 底部固定操作条 ---------- */
  .action-bar {
    display: flex;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 90;
    background: rgba(13, 31, 60, 0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--border-card);
    box-shadow: 0 -2px 20px rgba(0, 0, 0, 0.45);
    padding-bottom: env(safe-area-inset-bottom);
  }
  .action-bar__item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    min-height: 56px;
    padding: 6px 2px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.66rem;
    font-family: inherit;
    line-height: 1.2;
    text-decoration: none;
    cursor: pointer;
    transition: color var(--duration-fast) var(--ease-out);
    -webkit-tap-highlight-color: transparent;
  }
  .action-bar__item i { font-size: 1.05rem; }
  .action-bar__item--primary {
    flex: 1.3;
    margin: 7px 5px;
    min-height: 0;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--accent), #33DDFF);
    color: var(--bg-deep);
    font-weight: 700;
    box-shadow: 0 2px 16px var(--accent-glow);
  }
  .action-bar__item--primary:active { background: var(--accent-hover); }
}

/* ============================================================
   响应式 — 小手机 (≤ 375px)
   ============================================================ */
@media (max-width: 375px) {
  .stats { grid-template-columns: 1fr; }
  .category-grid { grid-template-columns: 1fr; }
  .detail__params { grid-template-columns: 1fr; }
  .hero__title { font-size: 1.4rem; }
  .inner-banner,
  .inner-banner--lg,
  .inner-banner--md { height: 160px; }

  /* 320px 上 Logo 的英文副行最占宽, 去掉它才放得下「平台体验」按钮 */
  .header__logo-name { font-size: 0.88rem; }
  .header__logo-sub { display: none; }
  .header__cta { padding: 8px 10px; font-size: 0.74rem; }
  .hero__actions { gap: 8px; }
  .hero__actions .btn { font-size: 0.78rem; padding: 12px 6px; }
}