/**
 * 绿源环保科技 — 企业站主题样式
 * 蓝绿色系 + 亮色大留白 + 纯白卡片 + 大圆角
 * 纯原生 CSS，无框架依赖
 * 架构：第三方模板模式（{pboot:sitedomain}/skin/）
 */

/* Google Fonts — 优雅中文无衬线 */


/* ============================================================
   CSS 变量体系 — 环保蓝绿主题
   ============================================================ */
:root {
  /* 主色系 — 蓝绿色 */
  --primary: #007B7F;
  --primary-dark: #006168;
  --primary-light: #0097A7;
  --primary-dim: rgba(0, 123, 127, 0.08);
  --primary-glow: rgba(0, 123, 127, 0.15);

  /* 辅助色 */
  --accent-green: #22C55E;
  --accent-green-dim: rgba(34, 197, 94, 0.1);
  --accent-amber: #F59E0B;
  --accent-teal: #00897B;

  /* 背景 */
  --bg-white: #FFFFFF;
  --bg-light: #F5F7FA;
  --bg-lighter: #FAFBFC;
  --bg-section-alt: #EEF2F6;
  --bg-card: #FFFFFF;
  --bg-card-hover: #FFFFFF;

  /* 文字色阶 */
  --text-primary: #1A2B3C;
  --text-secondary: #475569;
  --text-muted: #94A3B8;
  --text-inverse: #FFFFFF;

  /* 边框 */
  --border-light: #E8ECF0;
  --border-subtle: #EFF2F5;
  --border-input: #D1D5DB;
  --border-focus: #007B7F;

  /* 阴影 */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
  --shadow-card: 0 2px 16px rgba(0, 0, 0, 0.06);
  --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.12);

  /* 圆角 — 大圆角亲和力 */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 50%;

  /* 间距 */
  --section-py: 88px;
  --section-py-sm: 56px;
  --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 — 优雅现代中文无衬线 */
  --font-heading: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', -apple-system, sans-serif;
  --font-body: 'Noto Sans SC', 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', -apple-system, BlinkMacSystemFont, 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(0, 123, 127, 0.2);
  color: var(--text-primary);
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-light); }
::-webkit-scrollbar-thumb { background: #C4CDD5; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #8B979F; }

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: 0.18em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 0.75rem;
  position: relative;
  padding-left: 14px;
}

.section-tag::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 16px;
  background: var(--primary);
  border-radius: 2px;
}

.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.5rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  letter-spacing: 0.03em;
}

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

/* ============================================================
   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--alt {
  background: var(--bg-light);
}

.section--primary {
  background: var(--primary);
  color: var(--text-inverse);
}

/* ============================================================
   Header 头部 — 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(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
  transition: all var(--duration-normal) var(--ease-out);
}

.header.scrolled {
  box-shadow: var(--shadow-sm);
  background: rgba(255, 255, 255, 0.97);
}

.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: linear-gradient(135deg, var(--primary), var(--accent-teal));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: #fff;
}

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

.header__logo-name {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.header__logo-sub {
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  color: var(--primary);
  font-weight: 500;
}

/* 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-xs);
  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: 0;
  min-width: 180px;
  padding: 8px 0;
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--duration-normal) var(--ease-out);
  z-index: 60;
}

.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(--primary-dim);
}

/* 右侧操作区 */
.header__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: 20px;
}

.header__cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 22px;
  background: var(--accent-green);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-xs);
  transition: all var(--duration-fast) var(--ease-out);
}

.header__cta:hover {
  background: #16A34A;
  color: #fff;
  box-shadow: 0 4px 12px rgba(34, 197, 94, 0.3);
  transform: translateY(-1px);
}

/* ============================================================
   汉堡菜单（移动端）— 独立于 header__actions (13.4)
   ============================================================ */
.hamburger {
  display: none;
  width: 42px;
  height: 42px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: none;
  border: 2px solid var(--border-light);
  border-radius: var(--radius-xs);
  cursor: pointer;
  z-index: 110;
  margin-left: 10px;
  transition: border-color var(--duration-fast);
}

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

.hamburger span {
  display: block;
  width: 20px;
  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-xs);
  transition: all var(--duration-fast) var(--ease-out);
}

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

.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-xs);
  transition: all var(--duration-fast);
}

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

.mobile-nav__overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  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;
}

/* ============================================================
   内页 Banner
   ============================================================ */
.inner-banner {
  position: relative;
  height: 300px;
  overflow: hidden;
  background: var(--primary-dark);
}

.inner-banner__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.45;
}

.inner-banner__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 97, 104, 0.85) 0%, rgba(0, 123, 127, 0.7) 100%);
}

.inner-banner__content {
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  padding-top: var(--header-h);
}

.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, 0.8);
}

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

.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;
  color: var(--text-muted);
}

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

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

.btn--primary:hover {
  background: var(--primary-dark);
  box-shadow: 0 6px 20px rgba(0, 123, 127, 0.3);
  transform: translateY(-2px);
  color: #fff;
}

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

.btn--accent:hover {
  background: #16A34A;
  box-shadow: 0 6px 20px rgba(34, 197, 94, 0.3);
  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 {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* ============================================================
   卡片系统 — 纯白 + 轻阴影 + 悬浮上浮
   ============================================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out);
  box-shadow: var(--shadow-card);
}

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

.card__image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--bg-light);
}

.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: 22px;
}

.card__tag {
  display: inline-block;
  padding: 4px 12px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-dim);
  border-radius: 20px;
  margin-bottom: 8px;
}

.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: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card__desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  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-subtle);
  font-size: 0.82rem;
  color: var(--text-muted);
}

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

/* ============================================================
   Hero Banner — 全屏轮播
   ============================================================ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 580px;
  max-height: 800px;
  overflow: hidden;
  background: var(--primary-dark);
  margin-top: 0;
  padding-top: var(--header-h);
}

.hero .swiper {
  position: absolute;
  inset: 0;
}

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

.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(180deg,
    rgba(0, 55, 60, 0.55) 0%,
    rgba(0, 80, 85, 0.3) 50%,
    rgba(0, 97, 104, 0.75) 100%);
}

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

.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5.5vw, 3.5rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 1.2rem;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
  animation: fadeInUp 1s var(--ease-out) both;
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 2rem;
  font-weight: 400;
  animation: fadeInUp 1s var(--ease-out) 0.2s both;
}

.hero__actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s var(--ease-out) 0.4s both;
}

.hero-pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 28px;
}

.hero-pagination .swiper-pagination-bullet {
  width: 36px;
  height: 3px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.4);
  opacity: 1;
  transition: all var(--duration-normal);
}

.hero-pagination .swiper-pagination-bullet-active {
  width: 54px;
  background: #fff;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

/* 滚动指示器 */
.hero__scroll {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.hero__scroll-line {
  width: 1px;
  height: 28px;
  background: linear-gradient(180deg, #fff, transparent);
  animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); opacity: 1; }
  50% { transform: translateY(8px); opacity: 0.3; }
}

/* ============================================================
   首页 — 解决方案入口
   ============================================================ */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.solution-card {
  text-align: center;
  padding: 40px 24px;
  background: var(--bg-white);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  transition: all var(--duration-normal) var(--ease-out);
  box-shadow: var(--shadow-xs);
}

.solution-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-6px);
}

.solution-card__icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 18px;
  border-radius: var(--radius-md);
  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);
}

.solution-card:hover .solution-card__icon {
  background: var(--primary);
  color: #fff;
  transform: scale(1.08);
}

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

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

/* ============================================================
   首页 — 核心设备展示（三列大卡片）
   ============================================================ */
.equipment-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.equipment-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border-subtle);
  transition: all var(--duration-normal) var(--ease-out);
}

.equipment-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
}

.equipment-card__image {
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--bg-light);
}

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

.equipment-card:hover .equipment-card__image img {
  transform: scale(1.06);
}

.equipment-card__body {
  padding: 24px;
}

.equipment-card__capacity {
  display: inline-block;
  padding: 5px 14px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent-green);
  background: var(--accent-green-dim);
  border-radius: 20px;
  margin-bottom: 10px;
}

.equipment-card__title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.equipment-card__desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.equipment-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--primary);
  transition: gap var(--duration-fast);
}

.equipment-card__link:hover {
  gap: 10px;
}

/* ============================================================
   首页 — 数据统计区
   ============================================================ */
.stats-section {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary), var(--accent-teal));
  padding: 72px 0;
  position: relative;
  overflow: hidden;
}

.stats-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  text-align: center;
}

.stat-item__number {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 700;
  color: #fff;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-item__number .unit {
  font-size: 1.2rem;
  font-weight: 500;
  margin-left: 2px;
}

.stat-item__label {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.8);
  font-weight: 500;
}

/* ============================================================
   首页 — 关于我们（左图右文）
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

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

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

.about-image::after {
  content: '';
  position: absolute;
  bottom: -10px;
  right: -10px;
  width: 120px;
  height: 120px;
  background: var(--primary-dim);
  border-radius: var(--radius-md);
  z-index: -1;
}

.about-text {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.about-text p {
  color: var(--text-secondary);
  line-height: 1.85;
  font-size: 0.98rem;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 8px;
}

.about-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--bg-light);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
}

.about-feature i {
  color: var(--accent-green);
  font-size: 1rem;
}

/* ============================================================
   首页 — 技术优势（2列大卡片）
   ============================================================ */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.advantage-card {
  display: flex;
  gap: 20px;
  padding: 32px 28px;
  background: var(--bg-white);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xs);
  transition: all var(--duration-normal) var(--ease-out);
}

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

.advantage-card__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  background: var(--primary-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--primary);
  flex-shrink: 0;
  transition: all var(--duration-normal);
}

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

.advantage-card__title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.advantage-card__desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ============================================================
   首页 — 工程案例（三张大图卡片）
   ============================================================ */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

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

.case-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
}

.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;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 28px;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
  color: #fff;
}

.case-card__tag {
  display: inline-block;
  padding: 3px 10px;
  font-size: 0.72rem;
  background: var(--accent-green);
  color: #fff;
  border-radius: 4px;
  margin-bottom: 8px;
}

.case-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.case-card__scale {
  font-size: 0.85rem;
  opacity: 0.85;
}

/* ============================================================
   首页 — CTA 区域
   ============================================================ */
.cta-section {
  text-align: center;
  padding: 80px 0;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary), var(--accent-teal));
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 20%, rgba(255,255,255,0.06) 0%, transparent 50%),
              radial-gradient(circle at 70% 80%, rgba(34,197,94,0.1) 0%, transparent 50%);
  pointer-events: none;
}

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

.cta-section__desc {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1.1rem;
  margin-bottom: 32px;
}

/* ============================================================
   列表页 — 网格布局
   ============================================================ */
.list-header {
  text-align: center;
  margin-bottom: 48px;
  padding-top: 40px;
}

.list-header h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: 0.5rem;
}

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

/* 子栏目过滤栏 */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  padding: 16px 0;
  margin-bottom: 36px;
  -ms-overflow-style: none;
  scrollbar-width: none;
}

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

.filter-bar a {
  display: inline-flex;
  padding: 9px 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;
  border-color: var(--primary);
  background: var(--primary);
}

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

.detail__header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.detail__title {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  margin-bottom: 12px;
}

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

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

/* 产品参数表格 */
.detail__params {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin-bottom: 32px;
}

.detail__param {
  padding: 18px 16px;
  background: var(--bg-light);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  text-align: center;
  transition: all var(--duration-fast);
}

.detail__param:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.detail__param-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 6px;
  font-weight: 500;
}

.detail__param-value {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary);
}

/* 富文本正文 */
.detail__body {
  color: var(--text-secondary);
  line-height: 1.9;
  font-size: 0.98rem;
  letter-spacing: 0.015em;
}

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

.detail__body p { margin-bottom: 18px; }

.detail__body h2, .detail__body h3, .detail__body h4 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  margin-top: 36px;
  margin-bottom: 18px;
}

/* 上下篇 */
.detail__pager {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 56px;
  padding-top: 28px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.9rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 12px;
}

.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);
}

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

/* ============================================================
   新闻列表
   ============================================================ */
.news-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  max-width: 860px;
  margin: 0 auto;
}

.news-item {
  display: flex;
  gap: 20px;
  padding: 18px;
  background: var(--bg-white);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
  box-shadow: var(--shadow-xs);
}

.news-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
  transform: translateX(4px);
}

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

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

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

.news-item__title {
  font-size: 1.08rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-item__desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 8px;
}

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

/* ============================================================
   首页 — 新闻资讯（左大右小）
   ============================================================ */
.home-news-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.home-news-main {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 16/10;
  box-shadow: var(--shadow-card);
  transition: all var(--duration-normal) var(--ease-out);
}

.home-news-main:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
}

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

.home-news-main__overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 28px;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
  color: #fff;
}

.home-news-main__title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}

.home-news-main__desc {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.75);
}

.home-news-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.home-news-item {
  display: flex;
  gap: 14px;
  padding: 16px;
  background: var(--bg-white);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
  box-shadow: var(--shadow-xs);
}

.home-news-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
  transform: translateX(3px);
}

.home-news-item__date {
  text-align: center;
  flex-shrink: 0;
  min-width: 52px;
}

.home-news-item__day {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
}

.home-news-item__month {
  display: block;
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.home-news-item__title {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.5;
}

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

.contact-info__item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 22px;
  background: var(--bg-white);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  box-shadow: var(--shadow-xs);
  transition: all var(--duration-fast) var(--ease-out);
}

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

.contact-info__icon {
  width: 46px;
  height: 46px;
  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: 1.15rem;
}

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

.contact-info__value {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

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

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

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

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

.form-control {
  width: 100%;
  padding: 13px 16px;
  background: var(--bg-white);
  border: 1px solid var(--border-input);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.92rem;
  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);
}

textarea.form-control {
  resize: vertical;
  min-height: 110px;
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394A3B8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 38px;
}

/* ============================================================
   搜索页
   ============================================================ */
.search-box {
  max-width: 700px;
  margin: 0 auto;
}

.search-form-row {
  display: flex;
  gap: 10px;
}

.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-form-row input {
  flex: 1;
  padding: 15px 20px;
  padding-left: 44px;
  background: var(--bg-white);
  border: 1px solid var(--border-input);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
}

.search-form-row 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: var(--bg-white);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
  margin-bottom: 10px;
  box-shadow: var(--shadow-xs);
}

.search-result-item:hover {
  border-color: var(--primary);
  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-light);
}

.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: 1.02rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.search-result-item__date {
  font-size: 0.78rem;
  color: var(--text-muted);
  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;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-xs);
  transition: all var(--duration-fast) var(--ease-out);
}

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

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

.pagination .disabled {
  color: var(--text-muted);
  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;
}

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

.footer__top-line {
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent-teal), var(--accent-green));
}

.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;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.7;
  margin: 16px 0;
}

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

.footer__social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.95rem;
  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;
}

.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: #fff;
}

.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(--accent-green);
  margin-top: 3px;
  flex-shrink: 0;
}

/* 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: rgba(255, 255, 255, 0.7);
}

/* 友情链接 */
.friend-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  padding: 20px 0;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.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: #fff;
}

/* ============================================================
   返回顶部
   ============================================================ */
.back-top {
  position: fixed;
  right: 24px;
  bottom: 80px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  border: none;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  cursor: pointer;
  z-index: 80;
  opacity: 0;
  pointer-events: none;
  box-shadow: var(--shadow-md);
  transition: all var(--duration-normal) var(--ease-out);
}

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

.back-top:hover {
  background: var(--primary-dark);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

/* ============================================================
   关于我们页 — 特色区块
   ============================================================ */
.about-features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin: 48px 0;
}

.about-feature-card {
  text-align: center;
  padding: 36px 20px;
  background: var(--bg-white);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xs);
  transition: all var(--duration-normal) var(--ease-out);
}

.about-feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.about-feature-card__number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}

.about-feature-card__label {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
}

/* ============================================================
   动画
   ============================================================ */
@keyframes fadeInUp {
  0% { opacity: 0; transform: translateY(30px); }
  100% { opacity: 1; transform: translateY(0); }
}

/* AOS 覆盖 */
[data-aos] {
  transition-timing-function: var(--ease-out);
}

/* ============================================================
   响应式 — 平板 (768px - 1023px)
   ============================================================ */
@media (max-width: 1023px) {
  :root {
    --section-py: 64px;
    --section-py-sm: 48px;
  }

  .header__nav,
  .header__actions {
    display: none;
  }

  .hamburger {
    display: flex;
  }

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

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

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

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

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

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

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

  .home-news-grid {
    grid-template-columns: 1fr;
  }

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

  .news-item {
    flex-direction: column;
  }

  .news-item__thumb {
    width: 100%;
    height: 180px;
  }

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

/* ============================================================
   响应式 — 移动端 (< 768px)
   ============================================================ */
@media (max-width: 767px) {
  :root {
    --section-py: 52px;
  }

  .hero {
    height: 85vh;
    min-height: 450px;
  }

  .hero__content {
    padding-bottom: 40px;
  }

  .inner-banner {
    height: 220px;
  }

  .solutions-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .equipment-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .cases-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .case-card {
    aspect-ratio: 16/10;
  }

  .list-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

  .footer__bottom-inner {
    flex-direction: column;
    text-align: center;
  }

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

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

  .detail__pager {
    flex-direction: column;
    text-align: center;
    gap: 8px;
  }

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

  .about-features-grid {
    grid-template-columns: 1fr;
  }

  .news-item {
    flex-direction: column;
  }

  .news-item__thumb {
    width: 100%;
    height: 160px;
  }

  .search-result-item {
    flex-direction: column;
  }

  .search-result-item__thumb {
    width: 100%;
    height: 160px;
  }

  .subscribe-form {
    flex-direction: column;
  }

  .back-top {
    right: 12px;
    bottom: 60px;
  }
}

/* ============================================================
   偏好：减少动画
   ============================================================ */
@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;
  }
}