/**
 * SmartHome 智家 — 全屋智能企业站样式
 * 亮色主题：白 + 浅灰 + 深灰 + 科技蓝(#2563EB)
 * 大圆角卡片 + 轻阴影 + 杂志式排版
 * 原生 CSS，无框架依赖
 * 响应式断点：768px
 */

/* ============================================================
   CSS 变量体系
   ============================================================ */
:root {
  /* 主色系 */
  --primary: #2563EB;
  --primary-light: #3B82F6;
  --primary-lighter: #DBEAFE;
  --primary-dark: #1D4ED8;
  --primary-dim: rgba(37, 99, 235, 0.08);

  /* 背景色 */
  --bg: #FFFFFF;
  --bg-alt: #F8FAFC;
  --bg-gray: #F1F5F9;
  --bg-card: #FFFFFF;
  --bg-card-hover: #FAFBFC;

  /* 文字色 */
  --text: #1E293B;
  --text-secondary: #475569;
  --text-muted: #94A3B8;
  --text-inverse: #FFFFFF;

  /* 边框 */
  --border: #E2E8F0;
  --border-light: #F1F5F9;
  --border-focus: rgba(37, 99, 235, 0.3);

  /* 阴影 */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.05), 0 8px 24px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.06), 0 16px 48px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.08);
  --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.1), 0 4px 12px rgba(0, 0, 0, 0.05);

  /* 圆角 */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* 间距 */
  --section-py: 100px;
  --section-py-mobile: 60px;
  --container-max: 1200px;
  --container-narrow: 900px;
  --header-h: 72px;

  /* 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 用于英文/数字标题 + 思源黑体降级方案 */
  --font-display: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'STHeiti', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', 'Consolas', 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%;
  width: 100%;
  overflow-x: hidden;
}

body {
  background: var(--bg);
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  width: 100%;
  min-height: 100vh;
}

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

ul, ol { list-style: none; }

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

button { cursor: pointer; }

/* ============================================================
   容器 & 布局工具
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.container--narrow {
  max-width: var(--container-narrow);
}

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

.section--gray {
  background: var(--bg-alt);
}

.section--no-top {
  padding-top: 0;
}

.section--no-bottom {
  padding-bottom: 0;
}

/* ============================================================
   区块标题组件
   ============================================================ */
.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--primary-dim);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.7;
}

/* 区块头部居中 */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-header .section-subtitle {
  margin: 0 auto;
}

/* ============================================================
   按钮系统
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
  cursor: pointer;
  white-space: nowrap;
  line-height: 1.4;
}

.btn--primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}

.btn--primary:hover {
  background: var(--primary-dark);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.35);
  transform: translateY(-1px);
}

.btn--outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn--outline:hover {
  background: var(--primary);
  color: #fff;
}

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

.btn--ghost:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: var(--primary-dim);
}

.btn--white {
  background: #fff;
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

.btn--white:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn--lg {
  padding: 16px 36px;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
}

.btn--sm {
  padding: 8px 18px;
  font-size: 0.85rem;
}

/* ============================================================
   Header — 白色实底 + 深色文字 (13.11)
   ============================================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: all var(--duration-normal) var(--ease-out);
}

.header.scrolled {
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}

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

/* Logo */
.header__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.header__logo-icon {
  width: 40px;
  height: 40px;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

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

.header__logo-name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
}

.header__logo-sub {
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* 桌面导航 */
.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);
  white-space: nowrap;
}

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

/* 导航下拉 (13.3: z-index 足够高) */
.header__nav-item {
  position: relative;
}

.header__dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 180px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-fast) var(--ease-out);
  z-index: 60;
}

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

.header__dropdown a {
  display: block;
  padding: 10px 16px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
}

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

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

.header__cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  font-size: 0.88rem;
  font-weight: 600;
  color: #fff;
  background: var(--primary);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}

.header__cta:hover {
  background: var(--primary-dark);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
  transform: translateY(-1px);
}

/* 搜索按钮 */
.header__search-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
  font-size: 1rem;
}

.header__search-btn:hover {
  color: var(--primary);
  background: var(--primary-dim);
}

/* 汉堡菜单 (13.4: 独立在 .header__actions 外) */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  cursor: pointer;
  background: none;
  border: none;
  z-index: 110;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--duration-fast) 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: 85vw;
  height: 100vh;
  background: #fff;
  z-index: 105;
  transform: translateX(100%);
  transition: transform var(--duration-normal) var(--ease-out);
  box-shadow: var(--shadow-xl);
  overflow-y: auto;
}

.mobile-nav.open {
  transform: translateX(0);
}

.mobile-nav__inner {
  padding: 28px 20px;
}

.mobile-nav__link {
  display: block;
  padding: 14px 16px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
}

.mobile-nav__link:hover { color: var(--primary); background: var(--primary-dim); }

.mobile-nav__sub {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-normal) var(--ease-out);
  padding-left: 16px;
}

.mobile-nav__sub.open { max-height: 500px; }

.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(--primary); }

.mobile-nav__overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-fast) var(--ease-out);
}

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

/* ============================================================
   Hero Banner — 全屏 Swiper
   ============================================================ */
.hero {
  position: relative;
  width: 100%;
  height: 100vh;
  min-height: 600px;
  max-height: 900px;
  overflow: hidden;
  /* ★ 兜底背景：无幻灯片时显示科技蓝渐变 */
  background: linear-gradient(135deg, #1E3A5F 0%, #2563EB 40%, #3B82F6 70%, #1E3A5F 100%);
}

.hero-swiper {
  width: 100%;
  height: 100%;
}

.hero__slide {
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.3) 0%, rgba(15, 23, 42, 0.15) 40%, rgba(15, 23, 42, 0.5) 100%);
  z-index: 2;
}

.hero__content {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 24px;
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.75rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.3rem);
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 36px;
  max-width: 640px;
  line-height: 1.6;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.hero__actions .btn--primary {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  font-size: 1rem;
  padding: 14px 32px;
}

.hero__actions .btn--primary:hover {
  background: var(--primary);
  color: #fff;
}

.hero__actions .btn--outline {
  border-color: rgba(255, 255, 255, 0.6);
  color: #fff;
  font-size: 1rem;
  padding: 14px 32px;
}

.hero__actions .btn--outline:hover {
  background: #fff;
  color: var(--text);
  border-color: #fff;
}

/* Swiper 分页器 */
.hero .swiper-pagination {
  bottom: 40px !important;
  z-index: 4;
}

.hero .swiper-pagination-bullet {
  width: 10px;
  height: 10px;
  background: rgba(255, 255, 255, 0.5);
  opacity: 1;
  transition: all var(--duration-fast);
}

.hero .swiper-pagination-bullet-active {
  background: #fff;
  width: 28px;
  border-radius: 5px;
}

/* 英雄区滚动指示器 */
.hero__scroll {
  position: absolute;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 4;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  animation: scrollBounce 2s ease-in-out infinite;
}

.hero__scroll span { display: block; }

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.6), transparent);
}

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

/* ============================================================
   内页 Banner
   ============================================================ */
.inner-banner {
  position: relative;
  height: 320px;
  overflow: hidden;
  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(15, 23, 42, 0.6) 0%, rgba(15, 23, 42, 0.7) 100%);
}

.inner-banner__content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  text-align: center;
  padding: 0 24px;
}

.inner-banner__title {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.inner-banner__subtitle {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.7);
}

/* ============================================================
   面包屑
   ============================================================ */
.breadcrumb-bar {
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border-light);
  padding: 14px 0;
  position: sticky;
  top: var(--header-h);
  z-index: 40;
}

.breadcrumb {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.breadcrumb a { color: var(--text-secondary); }

.breadcrumb a:hover { color: var(--primary); }

.breadcrumb .fa-chevron-right {
  font-size: 0.6rem;
  margin: 0 8px;
  color: var(--text-muted);
}

.breadcrumb span:last-child { color: var(--text); }

/* ============================================================
   产品分类卡片 (首页模块2)
   ============================================================ */
.category-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

.category-card {
  background: var(--bg-alt);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 32px 20px;
  text-align: center;
  transition: all var(--duration-normal) var(--ease-out);
  cursor: pointer;
}

.category-card:hover {
  background: #fff;
  border-color: var(--primary-lighter);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.category-card__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  background: var(--primary-dim);
  color: var(--primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  transition: all var(--duration-normal) var(--ease-out);
}

.category-card:hover .category-card__icon {
  background: var(--primary);
  color: #fff;
}

.category-card__name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.category-card__desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ============================================================
   产品卡片 (首页模块3 / 列表页)
   ============================================================ */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.product-card {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out);
  box-shadow: var(--shadow-xs);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
  border-color: var(--primary-lighter);
}

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

.product-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-out);
}

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

.product-card__badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--primary);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-xs);
}

.product-card__body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.product-card__title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
  line-height: 1.4;
}

.product-card__features {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.5;
  flex: 1;
}

.product-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
}

.product-card__price {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary);
}

.product-card__link {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ============================================================
   场景卡片 (首页模块4)
   ============================================================ */
.scene-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.scene-card {
  position: relative;
  aspect-ratio: 3/4;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
}

.scene-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.scene-card__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transition: transform var(--duration-slow) var(--ease-out);
}

.scene-card:hover .scene-card__bg {
  transform: scale(1.08);
}

.scene-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(15, 23, 42, 0.8) 0%, rgba(15, 23, 42, 0.2) 50%, rgba(15, 23, 42, 0.05) 100%);
}

.scene-card__info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 24px;
  color: #fff;
  z-index: 1;
}

.scene-card__name {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.scene-card__desc {
  font-size: 0.82rem;
  opacity: 0.8;
}

/* ============================================================
   生态特性卡片
   ============================================================ */
.eco-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.eco-card {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  transition: all var(--duration-normal) var(--ease-out);
}

.eco-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary-lighter);
  transform: translateY(-4px);
}

.eco-card__icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  background: var(--primary-dim);
  color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  transition: all var(--duration-normal) var(--ease-out);
}

.eco-card:hover .eco-card__icon {
  background: var(--primary);
  color: #fff;
}

.eco-card__title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

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

/* ============================================================
   列表通用网格 (产品列表页/新闻列表/评价列表)
   ============================================================ */
.list-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.list-header {
  text-align: center;
  margin-bottom: 40px;
}

.list-header h1 {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

/* ============================================================
   新闻卡片 (首页模块8 / 列表页)
   ============================================================ */
.news-card {
  display: flex;
  gap: 20px;
  padding: 0;
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out);
  cursor: pointer;
}

.news-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary-lighter);
  transform: translateY(-2px);
}

.news-card__image {
  width: 240px;
  min-height: 180px;
  flex-shrink: 0;
  background: var(--bg-gray);
  overflow: hidden;
}

.news-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-out);
}

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

.news-card__body {
  padding: 24px 24px 24px 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  flex: 1;
  min-width: 0;
}

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

.news-card__title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card__desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ============================================================
   评价卡片 (首页模块7)
   ============================================================ */
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--duration-normal) var(--ease-out);
}

.review-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.review-card__stars {
  color: #F59E0B;
  font-size: 0.9rem;
  margin-bottom: 16px;
  letter-spacing: 2px;
}

.review-card__text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
  font-style: italic;
}

.review-card__author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
}

.review-card__avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-gray);
  overflow: hidden;
  flex-shrink: 0;
}

.review-card__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.review-card__name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

.review-card__role {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ============================================================
   关于我们区域
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-image {
  border-radius: var(--radius-xl);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--bg-gray);
  box-shadow: var(--shadow-lg);
}

.about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-text .section-title {
  margin-bottom: 20px;
}

.about-text p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 28px;
}

.about-stat {
  text-align: center;
  padding: 20px 12px;
  background: var(--bg-alt);
  border-radius: var(--radius-md);
}

.about-stat__num {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary);
}

.about-stat__label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ============================================================
   CTA 横幅
   ============================================================ */
.cta-section {
  padding: var(--section-py) 0;
  text-align: center;
}

.cta-card {
  background: var(--bg-alt);
  border: 2px solid var(--primary-lighter);
  border-radius: var(--radius-xl);
  padding: 64px 40px;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  transition: all var(--duration-normal) var(--ease-out);
}

.cta-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.cta-card .section-title {
  font-size: 1.75rem;
  margin-bottom: 12px;
}

.cta-card p {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

/* ============================================================
   数据统计条
   ============================================================ */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.stat-item {
  text-align: center;
  padding: 40px 20px;
  border-right: 1px solid var(--border-light);
  transition: all var(--duration-normal) var(--ease-out);
}

.stat-item:last-child { border-right: none; }

.stat-item:hover { background: var(--primary-dim); }

.stat-item__number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}

.stat-item__label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 6px;
}

/* ============================================================
   产品详情页
   ============================================================ */
.detail {
  max-width: var(--container-narrow);
  margin: 0 auto;
}

.detail-gallery {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 32px;
  background: var(--bg-gray);
}

.detail__header {
  margin-bottom: 28px;
}

.detail__title {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}

.detail__meta-row {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.detail__meta-row span {
  display: flex;
  align-items: center;
  gap: 6px;
}

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

.detail__param {
  background: var(--bg-alt);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  text-align: center;
}

.detail__param-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.detail__param-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
}

/* 正文容器 */
.detail__body {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.85;
}

.detail__body img {
  max-width: 100%;
  border-radius: var(--radius-sm);
  margin: 20px 0;
}

.detail__body h2, .detail__body h3 {
  color: var(--text);
  margin: 28px 0 12px;
}

.detail__body p { margin-bottom: 16px; }

.detail__body ul, .detail__body ol {
  padding-left: 20px;
  margin-bottom: 16px;
}

.detail__body ul li, .detail__body ol li {
  list-style: disc;
  margin-bottom: 6px;
}

/* 上下篇导航 */
.detail__pager {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 48px;
  padding: 20px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 12px;
}

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

.detail__pager a:hover { text-decoration: underline; }

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

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

/* ============================================================
   筛选/过滤栏
   ============================================================ */
.filter-bar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding: 14px 0;
}

.filter-bar a {
  padding: 8px 20px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  transition: all var(--duration-fast) var(--ease-out);
  border: 1px solid transparent;
}

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

.filter-bar a.active {
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
}

/* ============================================================
   分页
   ============================================================ */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  margin-top: 48px;
  flex-wrap: wrap;
}

.pagination a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
}

.pagination a:hover { color: var(--primary); border-color: var(--primary); }

.pagination a.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ============================================================
   空状态
   ============================================================ */
.empty-state {
  text-align: center;
  padding: 80px 20px;
  color: var(--text-muted);
}

.empty-state i {
  font-size: 3rem;
  color: var(--border);
  margin-bottom: 16px;
  display: block;
}

.empty-state p { font-size: 1rem; }

/* ============================================================
   搜索框
   ============================================================ */
.search-box {
  max-width: 640px;
  margin: 0 auto;
}

.search-form-row {
  display: flex;
  gap: 12px;
}

.search-input-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 12px;
  background: #fff;
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0 18px;
  transition: border-color var(--duration-fast);
}

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

.search-input-wrap i { color: var(--text-muted); font-size: 1rem; }

.search-input-wrap input {
  flex: 1;
  padding: 14px 0;
  font-size: 1rem;
  color: var(--text);
  background: transparent;
}

.search-input-wrap input::placeholder { color: var(--text-muted); }

/* 搜索结果 */
.search-result-item {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-light);
  transition: all var(--duration-fast) var(--ease-out);
  cursor: pointer;
}

.search-result-item:hover { background: var(--bg-alt); margin: 0 -16px; padding: 20px 16px; border-radius: var(--radius-sm); }

.search-result-item__thumb {
  width: 140px;
  height: 100px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-gray);
}

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

.search-result-item__info { flex: 1; min-width: 0; }

.search-result-item__title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.search-result-item__date {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.search-result-item__desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

.contact-info__item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}

.contact-info__icon {
  width: 48px;
  height: 48px;
  background: var(--primary-dim);
  color: var(--primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.contact-info__label {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.contact-info__value {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
}

/* 联系表单 */
.contact-form-card {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-sm);
}

/* ============================================================
   表单组件
   ============================================================ */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 6px;
}

.form-group .required { color: #EF4444; }

.form-control {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.95rem;
  color: var(--text);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
}

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

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

textarea.form-control { resize: vertical; min-height: 100px; }

select.form-control { cursor: pointer; appearance: none; }

/* ============================================================
   图库/画廊网格
   ============================================================ */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.gallery-item {
  position: relative;
  aspect-ratio: 4/3;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-gray);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
}

.gallery-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-out);
}

.gallery-item:hover img { transform: scale(1.05); }

.gallery-item__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15, 23, 42, 0.7) 0%, transparent 50%);
  display: flex;
  align-items: flex-end;
  padding: 20px;
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-out);
}

.gallery-item:hover .gallery-item__overlay { opacity: 1; }

.gallery-item__title {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
}

/* ============================================================
   Tab 切换
   ============================================================ */
.tab-nav {
  display: flex;
  gap: 4px;
  border-bottom: 2px solid var(--border-light);
  margin-bottom: 28px;
}

.tab-nav button {
  padding: 12px 24px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all var(--duration-fast) var(--ease-out);
  cursor: pointer;
}

.tab-nav button:hover { color: var(--primary); }

.tab-nav button.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.tab-panel { display: none; }

.tab-panel.active { display: block; }

/* ============================================================
   底部
   ============================================================ */
.footer {
  background: var(--text);
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 0;
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.3fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer__brand-desc {
  font-size: 0.9rem;
  line-height: 1.7;
  margin: 16px 0 20px;
  color: rgba(255, 255, 255, 0.55);
}

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

.footer__social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
  font-size: 1rem;
  transition: all var(--duration-fast) var(--ease-out);
}

.footer__social a:hover {
  color: #fff;
  border-color: var(--primary);
  background: var(--primary);
}

.footer__col-title {
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
}

.footer__links a {
  display: block;
  padding: 6px 0;
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.55);
  transition: all var(--duration-fast) var(--ease-out);
}

.footer__links a:hover { color: #fff; padding-left: 4px; }

.footer__contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 0.88rem;
}

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

.footer__qrcode {
  width: 100px;
  height: 100px;
  background: #fff;
  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;
}

/* 友情链接 */
.friend-links {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding: 24px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.friend-links__label {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
  flex-shrink: 0;
}

.friend-links a {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.4);
  transition: color var(--duration-fast) var(--ease-out);
}

.friend-links a:hover { color: #fff; }

/* 底栏 */
.footer__bottom {
  padding: 20px 0;
}

.footer__bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.4);
}

.footer__bottom a { color: rgba(255, 255, 255, 0.4); }

.footer__bottom a:hover { color: #fff; }

/* ============================================================
   在线客服悬浮按钮
   ============================================================ */
.online-service {
  position: fixed;
  right: 24px;
  bottom: 100px;
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.online-service__btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: #fff;
  box-shadow: var(--shadow-md);
  transition: all var(--duration-fast) var(--ease-out);
  cursor: pointer;
}

.online-service__btn--primary {
  background: var(--primary);
}

.online-service__btn--primary:hover {
  background: var(--primary-dark);
  transform: scale(1.08);
  box-shadow: var(--shadow-lg);
}

.online-service__btn--green {
  background: #22C55E;
}

.online-service__btn--green:hover {
  transform: scale(1.08);
}

.online-service__btn--top {
  background: #fff;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  font-size: 1rem;
}

.online-service__btn--top:hover {
  color: var(--primary);
  border-color: var(--primary);
}

/* ============================================================
   响应式 — 平板 (≤1023px)
   ============================================================ */
@media (max-width: 1023px) {
  :root {
    --section-py: 70px;
    --container-max: 100%;
  }

  .section-title { font-size: 1.75rem; }

  /* Header */
  .header__nav { display: none; }
  .header__actions .header__cta { display: none; }
  .hamburger { display: flex; }

  /* Hero */
  .hero { height: 70vh; min-height: 480px; overflow: hidden; }
  .hero__title { font-size: clamp(1.6rem, 4vw, 2.5rem); }

  /* Grid adjustments */
  .category-grid { grid-template-columns: repeat(3, 1fr); }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .scene-grid { grid-template-columns: repeat(2, 1fr); }
  .eco-grid { grid-template-columns: repeat(2, 1fr); }
  .list-grid { grid-template-columns: repeat(2, 1fr); }
  .review-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .detail__params { grid-template-columns: repeat(2, 1fr); }

  /* About */
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .about-image { aspect-ratio: 16/9; }

  /* Contact */
  .contact-grid { grid-template-columns: 1fr; }

  /* Footer */
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 32px; }

  /* News card */
  .news-card { flex-direction: column; }
  .news-card__image { width: 100%; height: 200px; min-height: auto; }
  .news-card__body { padding: 20px; }

  /* Gallery */
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ============================================================
   响应式 — 手机 (≤767px)
   ============================================================ */
@media (max-width: 767px) {
  :root {
    --section-py: 50px;
    --header-h: 60px;
  }

  .section-title { font-size: 1.5rem; }

  /* ★ Mobile layout fixes — prevent left-shift */
  .container {
    width: 100%;
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
    padding-left: 16px;
    padding-right: 16px;
  }

  /* Hero */
  .hero { height: 80vh; min-height: 420px; overflow: hidden; }
  .hero__actions { flex-direction: column; align-items: center; width: 100%; }
  .hero__actions .btn { width: 80%; justify-content: center; }
  .hero__title { font-size: clamp(1.5rem, 5vw, 2rem); padding: 0 8px; }
  .hero__subtitle { font-size: 0.95rem; padding: 0 16px; }

  /* ★ Header mobile fix */
  .header__inner { padding: 0 16px; }

  /* ★ Section overflow protection */
  .section { overflow: hidden; }

  /* ★ Footer mobile centering */
  .footer__bottom-inner { text-align: center; justify-content: center; }

  /* ★ Form grid collapse */
  .contact-grid .form-group,
  .detail .form-group { width: 100%; }

  /* Grids — single column for most */
  .category-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .product-grid { grid-template-columns: 1fr; gap: 16px; }
  .scene-grid { grid-template-columns: 1fr; }
  .eco-grid { grid-template-columns: 1fr; }
  .list-grid { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .stats-bar { grid-template-columns: 1fr 1fr; }
  .stat-item { padding: 24px 16px; }
  .stat-item__number { font-size: 1.8rem; }

  /* Detail */
  .detail__params { grid-template-columns: 1fr 1fr; }
  .detail__title { font-size: 1.4rem; }

  /* About */
  .about-stats { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .about-stat { padding: 16px 8px; }
  .about-stat__num { font-size: 1.3rem; }

  /* Footer */
  .footer__grid { grid-template-columns: 1fr; gap: 32px; }
  .footer__bottom-inner { flex-direction: column; text-align: center; }

  /* Breadcrumb */
  .breadcrumb-bar { top: var(--header-h); }

  /* Inner banner */
  .inner-banner { height: 220px; margin-top: var(--header-h); }
  .inner-banner__title { font-size: 1.6rem; }

  /* Search */
  .search-result-item { flex-direction: column; }
  .search-result-item__thumb { width: 100%; height: 160px; }

  /* Gallery */
  .gallery-grid { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }

  /* CTA */
  .cta-card { padding: 40px 24px; }
  .cta-card .section-title { font-size: 1.3rem; }

  /* Tab */
  .tab-nav { gap: 0; overflow-x: auto; }
  .tab-nav button { padding: 10px 16px; font-size: 0.82rem; white-space: nowrap; }

  /* Filter */
  .filter-bar { gap: 6px; }
  .filter-bar a { padding: 6px 14px; font-size: 0.8rem; }

  /* Contact form */
  .contact-form-card { padding: 24px; }

  /* Container */
  .container { padding: 0 16px; }
}

/* ============================================================
   响应式 — 手机原生排版层 (≤767px)
   ------------------------------------------------------------
   ★ 追加在文件末尾：媒体查询本身不提升特异性，与前面同特异性的规则
     相比靠"后出现"取胜，所以这一层必须留在最后。
   ★ head 里的 Swiper / AOS 样式表在本文件之后加载，凡是被它们覆盖
     过的属性（如 .swiper 的 position），本层都提高一级特异性。
   ============================================================ */
@media (max-width: 767px) {
  :root {
    --section-py: 38px;   /* 50px → 38px，10 个版块省下 240px */
    --header-h: 56px;     /* 60px → 56px */
  }

  /* ---------- 版块标题 ---------- */
  .section-header { margin-bottom: 26px; }
  .section-title { font-size: 1.32rem; }
  .section-subtitle { font-size: 0.85rem; }

  /* 标题下方的居中式按钮（5 处 inline margin-top:32~36px）统一收窄 */
  .section > .container > div[style*="text-align:center"] { margin-top: 20px !important; }
  .section > .container > div[style*="text-align:center"] .btn {
    font-size: 0.85rem;
    padding: 11px 22px;
  }

  /* ---------- Hero：80vh → 58vh ---------- */
  .hero { height: 52vh; min-height: 360px; }
  .hero__title { font-size: clamp(1.6rem, 7.5vw, 2.05rem); }
  .hero__subtitle { font-size: 0.85rem; line-height: 1.6; }
  /* 两个按钮并排，不再各占 80% 宽堆成两行 */
  .hero__actions { flex-direction: row; justify-content: center; gap: 10px; width: auto; }
  .hero__actions .btn { width: auto; padding: 11px 20px; font-size: 0.85rem; }
  .hero__scroll { display: none; }

  /* ---------- 内页 banner：320px → 160px ---------- */
  .inner-banner { height: 160px; }
  .inner-banner__title { font-size: 1.3rem; }

  /* ---------- 产品分类：2 列紧凑磁贴 ---------- */
  .category-grid { gap: 10px; }
  .category-card { padding: 14px 10px; }
  .category-card__icon { width: 36px; height: 36px; font-size: 0.95rem; margin-bottom: 8px; }
  .category-card__name { font-size: 0.9rem; margin-bottom: 4px; }
  .category-card__desc {
    font-size: 0.72rem;
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  /* ---------- ★ 产品卡：竖版 → 横向（左图右文） ----------
     首页「热销产品」+ 产品列表 + 搜索共用 .product-card。
     缩略图必须绝对定位：容器 height:auto 时 img 的 height:100% 解析不出
     确定值，会退回图片原始比例，把整张卡撑到 220px 高。 */
  .product-card { flex-direction: row; align-items: stretch; }
  .product-card__image {
    width: 112px;
    height: auto;
    min-height: 88px;
    aspect-ratio: auto;
    flex-shrink: 0;
    position: relative;
  }
  .product-card__image img { position: absolute; inset: 0; }
  .product-card__badge {
    top: 6px;
    left: 6px;
    font-size: 0.6rem;
    padding: 2px 6px;
  }
  .product-card__body { padding: 10px 12px; min-width: 0; }
  .product-card__title { font-size: 0.9rem; margin-bottom: 3px; }
  .product-card__features {
    font-size: 0.74rem;
    line-height: 1.45;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .product-card__footer { padding-top: 8px; gap: 8px; }
  .product-card__price { font-size: 0.95rem; }
  .product-card__link { font-size: 0.74rem; }
  .product-grid { gap: 10px; }

  /* ---------- 智能场景：1 列 → 2 列 ----------
     竖版 3/4 卡片占满整宽时单张就有 470px，4 张近 2000px。
     改 2 列后再压成 1:1，两行合计从 466px 降到 352px。 */
  .scene-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .scene-card { aspect-ratio: 1/1; }
  .scene-card__info { padding: 12px; }
  .scene-card__name { font-size: 0.95rem; }
  .scene-card__desc {
    font-size: 0.7rem;
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  /* ---------- 数据统计 ---------- */
  .stat-item { padding: 18px 10px; }
  .stat-item__number { font-size: 1.5rem; }
  .stat-item__label { font-size: 0.72rem; }

  /* ---------- 技术生态：1 列 → 2 列 ---------- */
  .eco-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .eco-card { padding: 14px 10px; }
  .eco-card__icon { width: 36px; height: 36px; font-size: 0.95rem; margin-bottom: 8px; }
  .eco-card__title { font-size: 0.88rem; margin-bottom: 5px; }
  .eco-card__desc {
    font-size: 0.72rem;
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  /* ---------- 关于品牌 ---------- */
  .about-grid { gap: 18px; }
  .about-image { aspect-ratio: 21/9; }
  .about-text p { font-size: 0.85rem; line-height: 1.75; }
  .about-stats { margin-top: 18px; gap: 8px; }
  .about-stat { padding: 12px 6px; }
  .about-stat__num { font-size: 1.25rem; }
  .about-stat__label { font-size: 0.68rem; }
  .about-text > div[style*="margin-top:20px"] { margin-top: 14px !important; }

  /* ---------- 客户评价：竖排 → 横向滑动条 ----------
     3 张竖排占掉 1250px；改成滑动条后下一张露边提示可滑。 */
  .review-grid {
    display: flex;
    grid-template-columns: none;
    gap: 10px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    margin: 0 -16px;
    padding: 0 16px 6px;
  }
  .review-grid::-webkit-scrollbar { display: none; }
  .review-grid .review-card {
    flex: 0 0 80%;
    scroll-snap-align: start;
  }
  .review-card { padding: 16px; }
  .review-card__text {
    font-size: 0.8rem;
    line-height: 1.65;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .review-card__avatar { width: 36px; height: 36px; }
  .review-card__name { font-size: 0.84rem; }
  .review-card__role { font-size: 0.72rem; }

  /* ---------- 新闻卡：保持横向（1023px 层把它改成了竖版） ---------- */
  .news-card { flex-direction: row; }
  .news-card__image {
    width: 112px;
    height: auto;
    min-height: 88px;
    flex-shrink: 0;
    position: relative;
  }
  .news-card__image img { position: absolute; inset: 0; }
  .news-card__body { padding: 10px 12px; min-width: 0; }
  .news-card__date { font-size: 0.66rem; margin-bottom: 4px; }
  .news-card__title { font-size: 0.88rem; line-height: 1.4; margin-bottom: 4px; }
  .news-card__desc {
    font-size: 0.73rem;
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  /* ---------- CTA ---------- */
  .cta-card { padding: 30px 18px; }
  .cta-card .section-title { font-size: 1.2rem; }
  .cta-card p { font-size: 0.85rem; }

  /* ---------- 页脚：4 段纵向堆叠 → 2×2 栅格 ---------- */
  .footer { padding: 34px 0 0; }
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 18px 14px;
    padding-bottom: 26px;
  }
  /* 品牌简介 | 关注我们 ／ 快速链接 | 联系我们 */
  .footer__grid > div:first-child { grid-column: 1; grid-row: 1; }
  .footer__grid > div:nth-child(4) { grid-column: 2; grid-row: 1; }
  .footer__grid > div:nth-child(2) { grid-column: 1; grid-row: 2; }
  .footer__grid > div:nth-child(3) { grid-column: 2; grid-row: 2; }
  .footer__brand-desc {
    font-size: 0.76rem;
    line-height: 1.6;
    margin: 10px 0 12px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .footer__social { gap: 6px; }
  .footer__social a { width: 32px; height: 32px; font-size: 0.82rem; }
  /* 品牌名在 171px 窄列里会折成「SmartHome 智 / 家」，缩一级让它单行 */
  .footer__grid > div:first-child a > div > span:first-child { font-size: 0.9rem !important; }
  .footer__col-title { font-size: 0.86rem; margin-bottom: 10px; }
  .footer__links a { padding: 4px 0; font-size: 0.76rem; }
  .footer__contact-item { font-size: 0.74rem; margin-bottom: 8px; gap: 8px; }
  .footer__qrcode { width: 72px; height: 72px; font-size: 0.56rem; }
  .friend-links { padding-top: 14px; margin-top: 0; gap: 6px 12px; }
  .friend-links__label, .friend-links a { font-size: 0.7rem; }
  .footer__bottom-inner { padding: 14px 0; gap: 6px; font-size: 0.7rem; }

  /* ---------- 悬浮按钮 ---------- */
  .online-service { right: 12px; bottom: 16px; gap: 8px; }
  .online-service__btn { width: 42px; height: 42px; font-size: 1.05rem; }

  /* ---------- 筛选 / 分页 ---------- */
  .filter-bar { gap: 6px; margin-bottom: 16px; }
  .filter-bar a { padding: 6px 13px; font-size: 0.75rem; }
  .pagination { margin-top: 22px; gap: 6px; }
  .pagination a { min-width: 34px; height: 34px; font-size: 0.78rem; }

  /* ---------- 产品详情 ---------- */
  .detail__params { gap: 8px; }
  .tab-nav { padding-bottom: 2px; scrollbar-width: none; }
  .tab-nav::-webkit-scrollbar { display: none; }
  .tab-nav button { flex-shrink: 0; }
  .related-grid { gap: 10px; }

  /* ---------- 表单 ---------- */
  .contact-form-card { padding: 20px 16px; }
  .form-group { margin-bottom: 14px; }
}