/**
 * 筑家建材 — 一站式装修建材解决方案
 * 主色：橙色 #ED8936 | 白色背景 | 浅灰辅助 | 深灰文字
 * 大圆角卡片 + 轻阴影 + 现代简洁风格
 * 依赖：Font Awesome 6, Swiper 11, AOS 2.3.4
 */

/* ============================================================
   CSS 变量体系
   ============================================================ */
:root {
  /* 主色调 — 橙色系 */
  --primary: #ED8936;
  --primary-dark: #DD6B20;
  --primary-light: #FBD38D;
  --primary-dim: rgba(237, 137, 54, 0.10);
  --primary-glow: rgba(237, 137, 54, 0.25);

  /* 背景色 */
  --bg-white: #FFFFFF;
  --bg-gray-50: #F7F8FA;
  --bg-gray-100: #EDF2F7;
  --bg-gray-200: #E2E8F0;

  /* 文字色 */
  --text-primary: #1A202C;
  --text-secondary: #4A5568;
  --text-muted: #A0AEC0;
  --text-white: #FFFFFF;

  /* 边框 */
  --border-light: #E2E8F0;
  --border-medium: #CBD5E0;
  --border-orange: rgba(237, 137, 54, 0.3);

  /* 阴影 */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.08), 0 4px 8px rgba(0, 0, 0, 0.04);
  --shadow-card-hover: 0 12px 36px rgba(0, 0, 0, 0.10), 0 4px 12px rgba(0, 0, 0, 0.05);

  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 50%;

  /* 间距 */
  --section-py: 88px;
  --container-max: 1200px;
  --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 */
  --font-heading: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Noto Sans CJK SC', 'Source Han Sans SC', 'Helvetica Neue', sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Noto Sans CJK SC', 'Source Han Sans SC', 'Segoe UI', sans-serif;
}

/* ============================================================
   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%;
}

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

::selection {
  background: rgba(237, 137, 54, 0.2);
  color: var(--text-primary);
}

/* 滚动条 */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-gray-50); }
::-webkit-scrollbar-thumb { background: var(--border-medium); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

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

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

ul, ol { list-style: none; }

input, textarea, select, button {
  font-family: inherit;
  font-size: inherit;
}

input::placeholder, textarea::placeholder {
  color: var(--text-muted);
  opacity: 1;
}

/* ============================================================
   排版
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: 0.02em;
}

.section-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--primary);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}

.section-title {
  font-size: clamp(1.5rem, 3.2vw, 2.25rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.7;
  margin: 0 auto;
}

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

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

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

.section--gray {
  background: var(--bg-gray-50);
}

/* ============================================================
   Header 头部 — 白色实底 + 深色文字
   ============================================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--duration-normal) var(--ease-out);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.header__inner {
  display: flex;
  align-items: center;
  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;
  margin-right: auto;
}

.header__logo-icon {
  width: 42px;
  height: 42px;
  background: var(--primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: #fff;
}

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

.header__logo-name {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

.header__logo-sub {
  font-size: 0.62rem;
  color: var(--primary);
  letter-spacing: 0.12em;
}

/* 主导航 */
.header__nav {
  display: flex;
  align-items: center;
  gap: 2px;
}

.header__nav-link {
  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 */
.header__nav-item {
  position: relative;
}

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

.header__dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 160px;
  padding: 8px 0;
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-normal) var(--ease-out);
  z-index: 60;
}

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

.header__dropdown a {
  display: block;
  padding: 10px 20px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
}

.header__dropdown a:hover {
  color: var(--primary);
  background: var(--bg-gray-50);
}

/* 右侧 CTA 按钮 */
.header__cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 22px;
  background: var(--primary);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  margin-left: 20px;
  transition: all var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}

.header__cta:hover {
  color: #fff;
  background: var(--primary-dark);
  box-shadow: 0 4px 14px var(--primary-glow);
  transform: translateY(-1px);
}

/* ============================================================
   汉堡菜单（移动端）
   ============================================================ */
.hamburger {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 110;
  margin-left: 8px;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: all var(--duration-normal) var(--ease-out);
}

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

.hamburger.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(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;
  left: 0;
  bottom: 0;
  width: 80%;
  max-width: 360px;
  background: #fff;
  z-index: 120;
  transform: translateX(-100%);
  transition: transform var(--duration-normal) var(--ease-out);
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

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

.mobile-nav__inner {
  padding: 24px;
  padding-top: 80px;
}

.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);
  border-bottom: 1px solid var(--bg-gray-100);
}

.mobile-nav__link:hover {
  color: var(--primary);
  background: var(--bg-gray-50);
}

.mobile-nav__sub {
  padding-left: 16px;
  display: none;
}

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

.mobile-nav__sub a {
  display: block;
  padding: 10px 16px;
  font-size: 0.9rem;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
}

.mobile-nav__overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 115;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal) var(--ease-out);
}

.mobile-nav__overlay.show {
  opacity: 1;
  pointer-events: auto;
}

/* ============================================================
   按钮系统
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  white-space: nowrap;
  text-decoration: none;
}

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

.btn--primary:hover {
  background: var(--primary-dark);
  box-shadow: 0 6px 20px var(--primary-glow);
  transform: translateY(-2px);
  color: #fff;
}

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

.btn--outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}

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

.btn--white:hover {
  background: var(--bg-gray-50);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.btn--ghost {
  background: var(--bg-gray-100);
  color: var(--text-secondary);
}

.btn--ghost:hover {
  background: var(--bg-gray-200);
  color: var(--text-primary);
}

/* ============================================================
   内页 Banner
   ============================================================ */
.inner-banner {
  position: relative;
  height: 320px;
  overflow: hidden;
  background: var(--text-primary);
  margin-top: var(--header-h);
}

.inner-banner__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.55;
}

.inner-banner__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(26, 32, 44, 0.65) 0%, rgba(26, 32, 44, 0.5) 100%);
}

.inner-banner__content {
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  z-index: 2;
}

.inner-banner__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.5rem;
}

.inner-banner__subtitle {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.75);
}

/* 面包屑 */
.breadcrumb-bar {
  background: var(--bg-gray-50);
  border-bottom: 1px solid var(--border-light);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 14px 24px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

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

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

.breadcrumb i {
  font-size: 0.65rem;
}

/* ============================================================
   卡片系统
   ============================================================ */
.card {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out);
  cursor: pointer;
}

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

.card__image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--bg-gray-100);
}

.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(1.06);
}

.card__body {
  padding: 20px;
}

.card__tag {
  display: inline-block;
  padding: 3px 12px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-dim);
  border-radius: 100px;
  margin-bottom: 10px;
}

.card__title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card__desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card__meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border-light);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.card__price {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
  margin-top: 8px;
}

/* ============================================================
   首页 — Hero Banner
   ============================================================ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  max-height: 800px;
  overflow: hidden;
  margin-top: var(--header-h);
}

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

.hero__slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, rgba(26, 32, 44, 0.35) 0%, rgba(26, 32, 44, 0.15) 40%, rgba(26, 32, 44, 0.7) 100%);
}

.hero__content {
  position: relative;
  z-index: 3;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  text-align: center;
  padding-bottom: 100px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 1rem;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 2rem;
  font-weight: 400;
}

.hero__actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Hero Swiper 分页器 */
.hero-pagination {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 28px;
}

.hero-pagination .swiper-pagination-bullet {
  width: 36px;
  height: 3px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.35);
  opacity: 1;
  transition: all var(--duration-normal);
  cursor: pointer;
}

.hero-pagination .swiper-pagination-bullet-active {
  width: 56px;
  background: var(--primary);
}

/* 滚动指示器 */
.hero__scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  animation: bounceDown 2s ease-in-out infinite;
}

.hero__scroll-line {
  width: 1px;
  height: 28px;
  background: linear-gradient(180deg, var(--primary), transparent);
}

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

/* ============================================================
   首页 — 服务数据（数字统计）
   ============================================================ */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-item {
  text-align: center;
  padding: 32px 16px;
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-normal) var(--ease-out);
}

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

.stat-item__number {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 6px;
}

.stat-item__label {
  font-size: 0.88rem;
  color: var(--text-secondary);
  font-weight: 500;
}

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

.category-card {
  text-align: center;
  padding: 32px 20px;
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 2px solid transparent;
  transition: all var(--duration-normal) var(--ease-out);
  cursor: pointer;
}

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

.category-card__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  border-radius: var(--radius-full);
  background: var(--primary-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--primary);
  transition: all var(--duration-normal) var(--ease-out);
}

.category-card:hover .category-card__icon {
  background: var(--primary);
  color: #fff;
  transform: scale(1.1);
}

.category-card__name {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* ============================================================
   首页 — 热销产品
   ============================================================ */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

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

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

.product-card__image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--bg-gray-100);
}

.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(1.06);
}

.product-card__body {
  padding: 20px;
}

.product-card__title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.product-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 12px;
}

.product-card__brand {
  font-size: 0.82rem;
  color: var(--text-muted);
}

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

/* ============================================================
   首页 — 装修服务
   ============================================================ */
.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.service-card {
  text-align: center;
  padding: 40px 24px;
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all var(--duration-normal) var(--ease-out);
  cursor: pointer;
}

.service-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
  border-color: var(--border-orange);
}

.service-card__icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  border-radius: var(--radius-full);
  background: var(--primary-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  color: var(--primary);
  transition: all var(--duration-normal) var(--ease-out);
}

.service-card:hover .service-card__icon {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 8px 24px var(--primary-glow);
}

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

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

/* ============================================================
   首页 — 装修案例
   ============================================================ */
.case-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.case-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 3 / 4;
  cursor: pointer;
  background: var(--bg-gray-100);
}

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

.case-card:hover img {
  transform: scale(1.08);
}

.case-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(transparent 40%, rgba(26, 32, 44, 0.85));
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px;
  transition: all var(--duration-normal) var(--ease-out);
}

.case-card__title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 4px;
}

.case-card__tag {
  font-size: 0.78rem;
  color: var(--primary-light);
}

/* ============================================================
   首页 — 客户评价
   ============================================================ */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  padding: 28px;
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all var(--duration-normal) var(--ease-out);
}

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

.testimonial-card__stars {
  color: var(--primary);
  font-size: 0.95rem;
  margin-bottom: 12px;
}

.testimonial-card__text {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
  font-style: italic;
}

.testimonial-card__author {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
}

.testimonial-card__avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--bg-gray-200);
  overflow: hidden;
}

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

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

/* ============================================================
   首页 — 新闻资讯
   ============================================================ */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.news-card {
  background: #fff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all var(--duration-normal) var(--ease-out);
  cursor: pointer;
}

.news-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-orange);
  transform: translateY(-3px);
}

.news-card__image {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--bg-gray-100);
}

.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: 20px;
}

.news-card__title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card__desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 12px;
}

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

/* ============================================================
   首页 — CTA 横幅
   ============================================================ */
.cta-section {
  text-align: center;
  padding: 80px 0;
  background: var(--primary);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
  pointer-events: none;
}

.cta-section::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 300px;
  height: 300px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 50%;
  pointer-events: none;
}

.cta-section__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: #fff;
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
}

.cta-section__subtitle {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
}

.cta-section .btn--white {
  position: relative;
  z-index: 1;
  font-size: 1rem;
  padding: 15px 40px;
  border-radius: 100px;
}

/* ============================================================
   Footer 底部
   ============================================================ */
.footer {
  background: var(--text-primary);
  color: rgba(255, 255, 255, 0.7);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  padding: 60px 0 40px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.footer__brand-desc {
  font-size: 0.88rem;
  line-height: 1.7;
  margin: 16px 0;
  color: rgba(255, 255, 255, 0.55);
}

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

.footer__social a {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 1rem;
  transition: all var(--duration-fast) var(--ease-out);
}

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

.footer__col-title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.footer__col-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
}

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

.footer__links a {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.55);
  transition: color var(--duration-fast);
}

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

.footer__contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 10px;
}

.footer__contact-item i {
  color: var(--primary);
  margin-top: 3px;
  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: #999;
}

/* 友情链接 */
.friend-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  padding: 20px 0;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.friend-links__label {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.4);
  flex-shrink: 0;
}

.friend-links a {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.45);
  transition: color var(--duration-fast);
}

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

/* 底部版权栏 */
.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
}

.footer__bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.4);
  flex-wrap: wrap;
  gap: 8px;
}

.footer__bottom a {
  color: rgba(255, 255, 255, 0.4);
  transition: color var(--duration-fast);
}

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

/* ============================================================
   列表页布局（产品/案例/新闻 通用）
   ============================================================ */
.page-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 36px;
  align-items: start;
}

/* 侧边栏 */
.sidebar {
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  overflow: hidden;
  position: sticky;
  top: calc(var(--header-h) + 24px);
}

.sidebar__title {
  padding: 20px;
  background: var(--primary);
  color: #fff;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  text-align: center;
}

.sidebar__nav a {
  display: block;
  padding: 14px 20px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--bg-gray-50);
  transition: all var(--duration-fast) var(--ease-out);
}

.sidebar__nav a:hover,
.sidebar__nav a.active {
  color: var(--primary);
  background: var(--primary-dim);
  padding-left: 24px;
}

/* 过滤栏 */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  margin-bottom: 28px;
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.filter-bar::-webkit-scrollbar { display: none; }

.filter-bar a {
  display: inline-flex;
  padding: 8px 20px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid var(--border-light);
  border-radius: 100px;
  white-space: nowrap;
  transition: all var(--duration-fast) var(--ease-out);
  flex-shrink: 0;
}

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

/* 产品列表网格 */
.list-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

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

/* 新闻列表（左图右文） */
.news-list-item {
  display: flex;
  gap: 20px;
  padding: 24px;
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all var(--duration-fast) var(--ease-out);
  margin-bottom: 16px;
  cursor: pointer;
}

.news-list-item:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-orange);
}

.news-list-item__thumb {
  width: 220px;
  height: 150px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--bg-gray-100);
}

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

.news-list-item__info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.news-list-item__title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.news-list-item__desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 10px;
}

.news-list-item__date {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ============================================================
   详情页
   ============================================================ */
.detail {
  max-width: 860px;
  margin: 0 auto;
}

.detail__header {
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-light);
}

.detail__title {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.detail__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

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

/* 产品详情 — 左图右文 */
.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.product-detail__gallery {
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-gray-100);
}

.product-detail__gallery .swiper-slide {
  aspect-ratio: 4 / 3;
}

.product-detail__gallery .swiper-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-detail__info {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.product-detail__title {
  font-size: 1.5rem;
  font-weight: 700;
}

.product-detail__params {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.product-detail__param {
  padding: 12px 16px;
  background: var(--bg-gray-50);
  border-radius: var(--radius-sm);
  text-align: center;
}

.product-detail__param-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.product-detail__param-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* 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: 600;
  color: var(--text-secondary);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}

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

.tab-panel {
  display: none;
}

.tab-panel:not(.hidden) {
  display: block;
}

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

/* 详情正文 */
.detail__body {
  color: var(--text-secondary);
  line-height: 2;
  font-size: 0.95rem;
}

.detail__body img {
  border-radius: var(--radius-md);
  margin: 24px 0;
  max-width: 100%;
}

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

.detail__body h2, .detail__body h3 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  margin-top: 32px;
  margin-bottom: 16px;
}

/* 上下篇 */
.detail__pager {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
  font-size: 0.88rem;
}

.detail__pager a {
  color: var(--text-secondary);
  transition: color var(--duration-fast);
}

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

/* 相关推荐 */
.related-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin: 56px 0 24px;
  color: var(--text-primary);
}

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

.contact-info__item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 18px;
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  transition: all var(--duration-fast) var(--ease-out);
}

.contact-info__item:hover {
  border-color: var(--border-orange);
  box-shadow: var(--shadow-sm);
}

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

.contact-info__label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

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

/* 联系表单 */
.contact-form-card {
  padding: 32px;
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-group label .required {
  color: #E53E3E;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-gray-50);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.9rem;
  transition: all var(--duration-fast) var(--ease-out);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-dim);
  background: #fff;
}

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

/* ============================================================
   搜索页
   ============================================================ */
.search-form-row {
  display: flex;
  gap: 10px;
  margin-bottom: 36px;
}

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

.search-input-wrap i {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 1rem;
}

.search-input-wrap input {
  width: 100%;
  padding: 14px 20px 14px 44px;
  background: #fff;
  border: 2px solid var(--border-light);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: all var(--duration-fast) var(--ease-out);
}

.search-input-wrap input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-dim);
}

.search-result-item {
  display: flex;
  gap: 16px;
  padding: 18px;
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
  margin-bottom: 10px;
  cursor: pointer;
}

.search-result-item:hover {
  border-color: var(--border-orange);
  box-shadow: var(--shadow-sm);
}

.search-result-item__thumb {
  width: 120px;
  height: 90px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--bg-gray-100);
}

.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-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

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

/* ============================================================
   分页
   ============================================================ */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 4px;
  margin-top: 48px;
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 8px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  background: #fff;
  transition: all var(--duration-fast) var(--ease-out);
}

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

.pagination .active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  font-weight: 600;
}

.pagination .disabled {
  opacity: 0.4;
  pointer-events: none;
}

/* ============================================================
   空状态
   ============================================================ */
.empty-state {
  text-align: center;
  padding: 60px 20px;
}

.empty-state i {
  font-size: 3rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  display: block;
  opacity: 0.4;
}

.empty-state p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ============================================================
   在线客服按钮
   ============================================================ */
.online-service {
  position: fixed;
  right: 20px;
  bottom: 120px;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-full);
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  cursor: pointer;
  z-index: 80;
  box-shadow: 0 4px 16px var(--primary-glow);
  transition: all var(--duration-normal) var(--ease-out);
  animation: pulse 2s infinite;
}

.online-service:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 24px var(--primary-glow);
}

@keyframes pulse {
  0% { box-shadow: 0 4px 16px var(--primary-glow); }
  50% { box-shadow: 0 4px 28px rgba(237, 137, 54, 0.5); }
  100% { box-shadow: 0 4px 16px var(--primary-glow); }
}

/* ============================================================
   返回顶部
   ============================================================ */
.back-top {
  position: fixed;
  right: 20px;
  bottom: 60px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: #fff;
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  cursor: pointer;
  z-index: 80;
  opacity: 0;
  pointer-events: none;
  transition: all var(--duration-normal) var(--ease-out);
  box-shadow: var(--shadow-sm);
}

.back-top.show {
  opacity: 1;
  pointer-events: auto;
}

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

/* ============================================================
   动画系统
   ============================================================ */
@keyframes fadeInUp {
  0% { opacity: 0; transform: translateY(20px); }
  100% { opacity: 1; transform: translateY(0); }
}

@keyframes scaleIn {
  0% { opacity: 0; transform: scale(0.92); }
  100% { opacity: 1; transform: scale(1); }
}

.hero__title {
  animation: fadeInUp 0.8s var(--ease-out) both;
}

.hero__subtitle {
  animation: fadeInUp 0.8s var(--ease-out) 0.15s both;
}

.hero__actions {
  animation: fadeInUp 0.8s var(--ease-out) 0.3s both;
}

/* ============================================================
   减少动画偏好
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}
/* ============================================================
   响应式 — 平板 (768px - 1023px)
   ============================================================ */
@media (max-width: 1023px) {
  :root { --section-py: 56px; }

  .header__nav,
  .header__cta {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .section-header {
    margin-bottom: 32px;
  }

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

  .product-grid,
  .service-grid,
  .case-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .page-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  /* 过滤栏是 nowrap 的横滑条，min-content 会被当成整条宽度，
     必须允许栅格子项收缩，否则整页被撑出横向滚动 */
  .page-layout > * {
    min-width: 0;
  }

  .sidebar {
    position: static;
  }

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

  .list-grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .product-detail {
    grid-template-columns: 1fr;
  }

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

  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* ============================================================
   响应式 — 移动端 (< 768px)
   ------------------------------------------------------------
   ★ 移动端不是「PC 版等比缩小」，而是按竖屏单手阅读重新排版：
     1. 首屏 85vh → 56vh，一屏内就能看到内容入口
     2. 分类/服务/案例/评价 → 横向滑动轨道 (rail)，把原来的
        2~3 行网格压成 1 行
     3. 资讯 → 左图右文紧凑列表（原 3 张大卡约 1100px → 340px）
     4. 页脚四栏 → 品牌条 + 双栏 + 横向「关注我们」条
     5. 列表页侧边栏与过滤栏栏目完全重复，移动端只留过滤栏
     6. 表单控件统一 16px，避免 iOS Safari 聚焦时自动放大整页
   ============================================================ */
@media (max-width: 767px) {
  :root {
    --section-py: 38px;
    --header-h: 58px;
  }

  body {
    font-size: 14px;
    line-height: 1.7;
  }

  .container {
    padding: 0 16px;
  }

  /* 触摸反馈：移动端没有 hover，用 :active 替代 */
  a, button {
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
  }

  .product-card:active,
  .news-card:active,
  .news-list-item:active,
  .case-card:active,
  .category-card:active,
  .service-card:active,
  .card:active,
  .search-result-item:active {
    transform: scale(0.985);
  }

  /* ---------- 标题组：左对齐 + 收紧留白 ---------- */
  .section-header {
    text-align: left;
    margin-bottom: 16px;
  }

  .section-tag {
    font-size: 0.66rem;
    letter-spacing: 0.12em;
    margin-bottom: 2px;
  }

  .section-title {
    font-size: 1.28rem;
    margin-bottom: 4px;
  }

  .section-subtitle {
    font-size: 0.82rem;
    line-height: 1.6;
    margin: 0;
  }

  /* ---------- 顶栏 ---------- */
  .header__inner {
    padding: 0 16px;
  }

  .header__logo-icon {
    width: 34px;
    height: 34px;
    font-size: 1rem;
    border-radius: 7px;
  }

  .header__logo-name {
    font-size: 1rem;
  }

  .header__logo-sub {
    font-size: 0.56rem;
  }

  .hamburger {
    width: 38px;
    height: 38px;
    margin-left: 2px;
  }

  .mobile-nav {
    width: 84%;
  }

  .mobile-nav__inner {
    padding: 20px;
    padding-top: 68px;
  }

  .mobile-nav__link {
    padding: 12px;
    font-size: 0.95rem;
  }

  .mobile-nav__sub a {
    padding: 9px 12px;
    font-size: 0.85rem;
  }

  /* ---------- 首屏 Hero：85vh → 56vh ---------- */
  .hero {
    height: 56vh;
    height: 56svh;
    min-height: 300px;
    max-height: 400px;
  }

  .hero__content {
    justify-content: flex-end;
    padding: 0 16px 26px;
  }

  .hero__title {
    font-size: 1.55rem;
    line-height: 1.25;
    margin-bottom: 8px;
  }

  .hero__subtitle {
    font-size: 0.85rem;
    line-height: 1.5;
    margin-bottom: 16px;
  }

  .hero__actions {
    gap: 10px;
  }

  .hero__actions .btn {
    padding: 10px 18px;
    font-size: 0.82rem;
  }

  .hero-pagination {
    margin-top: 16px;
    gap: 6px;
  }

  .hero-pagination .swiper-pagination-bullet {
    width: 20px;
    height: 2px;
  }

  .hero-pagination .swiper-pagination-bullet-active {
    width: 32px;
  }

  .hero__scroll {
    display: none;
  }

  /* ---------- 数据统计：一行四格 ---------- */
  .stats {
    /* minmax(0,1fr) 保证长文案不会把轨道撑破页面 */
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
  }

  .stat-item {
    padding: 12px 4px;
    border-radius: var(--radius-sm);
  }

  .stat-item__number {
    font-size: 1.3rem;
    margin-bottom: 2px;
  }

  /* 覆盖 HTML 内联的 font-size:1.5rem */
  .stat-item__number span {
    font-size: 0.8rem !important;
  }

  /* 4 格一行时「服务客户（家）」在 375px 下正好单行放下，不再折成两行 */
  .stat-item__label {
    font-size: 0.62rem;
    line-height: 1.35;
  }

  /* ---------- 内页 Banner + 面包屑 ---------- */
  .inner-banner {
    height: 150px;
  }

  .inner-banner__title {
    font-size: 1.25rem;
  }

  .inner-banner__subtitle {
    font-size: 0.8rem;
  }

  .breadcrumb {
    padding: 9px 16px;
    gap: 6px;
    font-size: 0.74rem;
  }

  /* ============================================================
     横滑轨道 (rail) — 需在模板容器上加 .rail-mobile 类
     破格到屏幕两侧并露出下一张卡的一角，提示可以左右滑
     ============================================================ */
  .rail-mobile {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x proximity;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
    margin: 0 -16px;
    padding: 2px 16px 8px;
  }

  .rail-mobile::-webkit-scrollbar { display: none; }

  .rail-mobile > * {
    flex-shrink: 0;
    scroll-snap-align: start;
  }

  /* 产品分类轨道 */
  .category-grid.rail-mobile .category-card {
    flex-basis: 92px;
    padding: 14px 8px;
  }

  .category-grid.rail-mobile .category-card__icon {
    width: 42px;
    height: 42px;
    font-size: 1rem;
    margin-bottom: 8px;
  }

  .category-grid.rail-mobile .category-card__name {
    font-size: 0.8rem;
  }

  /* 装修服务轨道 */
  .service-grid.rail-mobile .service-card {
    flex-basis: 62%;
    text-align: left;
    padding: 16px 14px;
  }

  .service-grid.rail-mobile .service-card__icon {
    width: 38px;
    height: 38px;
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
    margin: 0 0 10px;
  }

  .service-grid.rail-mobile .service-card__title {
    font-size: 0.92rem;
    margin-bottom: 4px;
  }

  .service-grid.rail-mobile .service-card__desc {
    font-size: 0.78rem;
    line-height: 1.55;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  /* 装修案例轨道 */
  .case-grid.rail-mobile .case-card {
    flex-basis: 46%;
  }

  .case-grid.rail-mobile .case-card__overlay {
    padding: 12px;
  }

  .case-grid.rail-mobile .case-card__title {
    font-size: 0.85rem;
    margin-bottom: 2px;
  }

  .case-grid.rail-mobile .case-card__tag {
    font-size: 0.7rem;
  }

  /* 客户评价轨道 */
  .testimonial-grid.rail-mobile .testimonial-card {
    flex-basis: 80%;
    padding: 16px;
  }

  .testimonial-grid.rail-mobile .testimonial-card__stars {
    font-size: 0.78rem;
    margin-bottom: 8px;
  }

  .testimonial-grid.rail-mobile .testimonial-card__text {
    font-size: 0.82rem;
    line-height: 1.6;
    font-style: normal;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .testimonial-grid.rail-mobile .testimonial-card__author {
    padding-top: 10px;
    gap: 8px;
  }

  .testimonial-grid.rail-mobile .testimonial-card__avatar {
    width: 32px;
    height: 32px;
  }

  .testimonial-grid.rail-mobile .testimonial-card__name {
    font-size: 0.82rem;
  }

  .testimonial-grid.rail-mobile .testimonial-card__role {
    font-size: 0.7rem;
  }

  /* ---------- 热销产品：两列紧凑 ---------- */
  .product-grid {
    gap: 10px;
  }

  .product-card__image {
    aspect-ratio: 1 / 1;
  }

  .product-card__body {
    padding: 10px 12px 12px;
  }

  .product-card__title {
    font-size: 0.85rem;
    margin-bottom: 3px;
  }

  /* 覆盖 HTML 内联的 font-size:0.85rem */
  .product-card__body p {
    font-size: 0.72rem !important;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .product-card__meta {
    margin-top: 8px;
  }

  .product-card__brand {
    font-size: 0.68rem;
  }

  .product-card__price {
    font-size: 0.92rem;
  }

  /* ---------- 新闻资讯：左图右文紧凑列表 ---------- */
  .news-grid {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .news-card {
    display: flex;
    align-items: stretch;
  }

  .news-card__image {
    flex: 0 0 104px;
    width: 104px;
    height: 104px;
    aspect-ratio: auto;
  }

  .news-card__body {
    flex: 1;
    min-width: 0;
    padding: 10px 12px;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .news-card__title {
    font-size: 0.85rem;
    line-height: 1.45;
    margin-bottom: 4px;
  }

  .news-card__desc {
    font-size: 0.72rem;
    -webkit-line-clamp: 1;
    margin-bottom: 6px;
  }

  .news-card__date {
    font-size: 0.68rem;
  }

  /* ---------- 底部 CTA ---------- */
  .cta-section {
    padding: 34px 0;
  }

  .cta-section__title {
    font-size: 1.15rem;
    margin-bottom: 6px;
  }

  .cta-section__subtitle {
    font-size: 0.82rem;
    line-height: 1.6;
    margin-bottom: 18px;
  }

  .cta-section .btn--white {
    padding: 12px 30px;
    font-size: 0.88rem;
  }

  /* ---------- 页脚：品牌条 + 双栏 + 横向关注条 ---------- */
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 20px 16px;
    padding: 28px 16px 20px;
  }

  .footer__grid > div:first-child {
    grid-column: 1 / -1;
  }

  .footer__grid > div:first-child > a {
    margin-bottom: 10px !important;
  }

  .footer__brand-desc {
    font-size: 0.78rem;
    line-height: 1.6;
    margin: 10px 0 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .footer__social {
    gap: 8px;
  }

  .footer__social a {
    width: 34px;
    height: 34px;
    font-size: 0.88rem;
  }

  .footer__col-title {
    font-size: 0.88rem;
    margin-bottom: 12px;
    padding-bottom: 8px;
  }

  .footer__col-title::after {
    width: 22px;
  }

  .footer__links {
    gap: 8px;
  }

  .footer__links a {
    font-size: 0.78rem;
  }

  .footer__contact-item {
    font-size: 0.76rem;
    line-height: 1.5;
    gap: 8px;
    margin-bottom: 7px;
  }

  /* 「关注我们」→ 横向一条，省掉一整块竖排高度 */
  .footer__grid > div:nth-child(4) {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    gap: 12px;
    padding-top: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }

  .footer__grid > div:nth-child(4) .footer__col-title {
    margin: 0;
    padding: 0;
    flex-shrink: 0;
  }

  .footer__grid > div:nth-child(4) .footer__col-title::after {
    display: none;
  }

  .footer__grid > div:nth-child(4) p {
    margin: 0 !important;
    font-size: 0.72rem !important;
    flex: 1;
    min-width: 0;
  }

  .footer__qrcode {
    width: 68px;
    height: 68px;
    font-size: 0.6rem;
    flex-shrink: 0;
  }

  .friend-links {
    padding: 14px 16px;
    gap: 10px 14px;
  }

  .friend-links__label,
  .friend-links a {
    font-size: 0.72rem;
  }

  .footer__bottom {
    padding: 14px 0;
  }

  .footer__bottom-inner {
    flex-direction: column;
    text-align: center;
    gap: 6px;
    padding: 0 16px;
    font-size: 0.72rem;
  }

  /* ============================================================
     列表页
     ============================================================ */
  /* 侧边栏与过滤栏栏目完全重复，移动端只保留可横滑的过滤栏 */
  .sidebar {
    display: none;
  }

  .filter-bar {
    margin: 0 -16px 16px;
    padding: 0 16px 8px;
  }

  .filter-bar a {
    padding: 6px 14px;
    font-size: 0.78rem;
  }

  .list-grid-4,
  .list-grid-3 {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  /* 通用卡片紧凑化 */
  .card__image {
    aspect-ratio: 1 / 1;
  }

  .card__body {
    padding: 10px 12px 12px;
  }

  .card__tag {
    font-size: 0.62rem;
    padding: 2px 8px;
    margin-bottom: 5px;
  }

  .card__title {
    font-size: 0.82rem;
    margin-bottom: 2px;
  }

  .card__desc {
    font-size: 0.72rem;
    -webkit-line-clamp: 1;
  }

  .card__price {
    font-size: 0.92rem;
    margin-top: 4px;
  }

  /* 新闻列表页：左图右文（原竖排大卡每条约 330px → 116px） */
  .news-list-item {
    flex-direction: row;
    gap: 12px;
    padding: 10px;
    margin-bottom: 10px;
  }

  .news-list-item__thumb {
    width: 96px;
    height: 96px;
    flex: 0 0 96px;
  }

  .news-list-item__title {
    font-size: 0.85rem;
    line-height: 1.45;
    margin-bottom: 4px;
  }

  .news-list-item__desc {
    font-size: 0.72rem;
    -webkit-line-clamp: 1;
    margin-bottom: 4px;
  }

  .news-list-item__date {
    font-size: 0.68rem;
  }

  .news-list-item__date span {
    margin-left: 10px !important;
  }

  /* ============================================================
     详情页
     ============================================================ */
  .detail__header {
    margin-bottom: 18px;
    padding-bottom: 14px;
  }

  .detail__title {
    font-size: 1.15rem;
    margin-bottom: 8px;
  }

  .detail__meta {
    gap: 12px;
    font-size: 0.74rem;
  }

  .detail__body {
    font-size: 0.9rem;
    line-height: 1.85;
  }

  .detail__body img {
    margin: 16px 0;
    border-radius: var(--radius-sm);
  }

  .detail__body h2,
  .detail__body h3 {
    margin-top: 22px;
    margin-bottom: 10px;
  }

  .detail__pager {
    margin-top: 30px;
    padding-top: 16px;
    gap: 10px;
    font-size: 0.78rem;
  }

  .detail__pager a {
    max-width: 46%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  /* 产品详情 */
  .product-detail {
    gap: 20px;
  }

  .product-detail__info {
    gap: 12px;
  }

  .product-detail__title {
    font-size: 1.15rem;
  }

  .product-detail__params {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .product-detail__param {
    padding: 9px 6px;
  }

  .product-detail__param-label {
    font-size: 0.68rem;
  }

  .product-detail__param-value {
    font-size: 0.82rem;
  }

  /* Tab 切换 */
  .tab-nav {
    gap: 0;
    margin-bottom: 18px;
  }

  .tab-nav button {
    padding: 10px 14px;
    font-size: 0.82rem;
  }

  .related-title {
    font-size: 1.05rem;
    margin: 32px 0 16px;
  }

  /* ============================================================
     联系 / 留言 / 搜索
     ============================================================ */
  .contact-grid {
    gap: 24px;
  }

  .contact-info__item {
    padding: 12px;
    gap: 12px;
    margin-bottom: 8px;
  }

  .contact-info__icon {
    width: 38px;
    height: 38px;
    font-size: 0.95rem;
  }

  .contact-info__label {
    font-size: 0.76rem;
  }

  .contact-info__value {
    font-size: 0.82rem;
  }

  .contact-form-card {
    padding: 18px;
    border-radius: var(--radius-md);
  }

  .form-group {
    margin-bottom: 12px;
  }

  .form-group label {
    font-size: 0.78rem;
    margin-bottom: 4px;
  }

  /* ★ 16px 可避免 iOS Safari 聚焦输入框时自动放大整页 */
  .form-control,
  .search-input-wrap input {
    font-size: 16px;
    padding: 11px 14px;
  }

  textarea.form-control {
    min-height: 84px;
  }

  .contact-form-card .btn {
    width: 100%;
    justify-content: center;
    padding: 13px;
  }

  .search-form-row {
    gap: 8px;
    margin-bottom: 20px;
  }

  .search-form-row .btn {
    padding: 12px 18px;
    font-size: 0.85rem;
  }

  .search-result-item {
    padding: 10px;
    gap: 10px;
    margin-bottom: 8px;
  }

  .search-result-item__thumb {
    width: 84px;
    height: 84px;
    flex: 0 0 84px;
  }

  .search-result-item__title {
    font-size: 0.85rem;
  }

  .search-result-item__desc {
    font-size: 0.72rem;
    -webkit-line-clamp: 1;
  }

  /* ============================================================
     分页 / 空状态 / 悬浮按钮
     ============================================================ */
  .pagination {
    margin-top: 26px;
    gap: 6px;
    flex-wrap: wrap;
  }

  .pagination a,
  .pagination span {
    min-width: 34px;
    height: 34px;
    font-size: 0.8rem;
  }

  .empty-state {
    padding: 40px 16px;
  }

  .empty-state i {
    font-size: 2.2rem;
  }

  .btn {
    padding: 11px 22px;
    font-size: 0.86rem;
  }

  .online-service {
    right: 14px;
    bottom: 74px;
    width: 44px;
    height: 44px;
    font-size: 1.05rem;
  }

  .back-top {
    right: 14px;
    bottom: 20px;
    width: 38px;
    height: 38px;
  }
}

/* ============================================================
   响应式 — 小屏手机 (< 375px)
   ★ 两列网格不再塌成一列（塌成一列反而更长），
     只把横滑轨道的卡宽再收一点
   ============================================================ */
@media (max-width: 374px) {
  :root {
    --section-py: 32px;
  }

  .category-grid.rail-mobile .category-card {
    flex-basis: 84px;
  }

  .service-grid.rail-mobile .service-card {
    flex-basis: 66%;
  }

  .testimonial-grid.rail-mobile .testimonial-card {
    flex-basis: 84%;
  }

  .news-card__image {
    flex-basis: 92px;
    width: 92px;
    height: 92px;
  }

  .news-list-item__thumb {
    width: 84px;
    height: 84px;
    flex: 0 0 84px;
  }

  .header__logo-sub {
    display: none;
  }
}