/**
 * 汇科化工 — 化工原料B2B企业官网样式
 * 深蓝(#0D1B2A)+白+银灰+金色点缀
 * 暗色主题，稳重专业，工业质感
 * 纯原生CSS，无框架依赖
 */

/* ============================================================
   CSS 变量体系
   ============================================================ */
:root {
  /* 基底色 — 深蓝工业 */
  --bg-deep: #0D1B2A;
  --bg-night: #0A1628;
  --bg-card: #112240;
  --bg-card-hover: #152D50;
  --bg-input: rgba(255, 255, 255, 0.04);

  /* 金色点缀 */
  --gold: #C9A96E;
  --gold-light: #D4BC8B;
  --gold-dim: rgba(201, 169, 110, 0.12);
  --gold-glow: rgba(201, 169, 110, 0.25);

  /* 辅助色 */
  --silver: #94A3B8;
  --white: #E8ECF4;

  /* 文字色阶 */
  --text-primary: #E8ECF4;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;

  /* 边框 */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-gold: rgba(201, 169, 110, 0.3);
  --border-card: rgba(255, 255, 255, 0.06);

  /* 阴影 */
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-gold: 0 0 20px rgba(201, 169, 110, 0.12);

  /* 圆角 — 小圆角专业感 */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  /* 间距 */
  --section-py: 80px;
  --container-max: 1200px;
  --header-h: 72px;

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

  /* 字体 — B2B专业化工风格，清晰可读 */
  --font-heading: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Consolas', 'Monaco', monospace;
}

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

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

body {
  background: var(--bg-deep);
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

::selection { background: rgba(201, 169, 110, 0.25); color: #fff; }

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-night); }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.12); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--gold); }

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: 700;
  line-height: 1.35;
  letter-spacing: 0.02em;
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.6rem;
}

.section-title {
  font-size: clamp(1.5rem, 3.2vw, 2.2rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  letter-spacing: 0.03em;
}

.section-subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.7;
}

/* 区块标题组 — 统一间距，便于移动端整体收紧 */
.section-head { margin-bottom: 40px; }
.section-head--center { text-align: center; }
.section-head--center .section-subtitle { margin-left: auto; margin-right: auto; }
.section-head--row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

/* ============================================================
   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-night); }

/* 区块分割线 */
.section-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-gold), transparent);
  margin: 0 auto;
  max-width: var(--container-max);
}

/* ============================================================
   Header 头部（固定深色）
   ============================================================ */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(10, 22, 40, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--duration-normal) var(--ease-out);
}

.header.scrolled {
  background: rgba(10, 22, 40, 0.98);
  box-shadow: 0 2px 30px rgba(0, 0, 0, 0.5);
}

.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: 38px; height: 38px;
  background: linear-gradient(135deg, var(--gold), #8B6914);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; color: #fff; font-weight: 700;
}

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

.header__logo-name {
  font-family: var(--font-heading);
  font-size: 1.05rem; font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.02em;
}

.header__logo-sub {
  font-size: 0.58rem; letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
}

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

.header__nav-link {
  padding: 8px 14px;
  font-size: 0.88rem; font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}

.header__nav-link:hover,
.header__nav-link.active {
  color: var(--gold);
  background: var(--gold-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: 160px;
  padding: 6px 0;
  background: rgba(10, 22, 40, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
  opacity: 0; visibility: hidden;
  transform: translateY(8px);
  transition: all var(--duration-normal) var(--ease-out);
  z-index: 60;
}

.header__dropdown a {
  display: block;
  padding: 9px 18px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
}

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

/* 右侧CTA */
.header__actions { display: flex; align-items: center; gap: 10px; margin-left: 18px; }

.header__cta {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 18px;
  border: 1px solid var(--gold);
  color: var(--gold);
  font-size: 0.82rem; font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}

.header__cta:hover {
  background: var(--gold);
  color: #0D1B2A;
  box-shadow: var(--shadow-gold);
}

/* ============================================================
   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: 340px;
  background: rgba(10, 22, 40, 0.98);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  z-index: 120;
  transform: translateX(-100%);
  transition: transform var(--duration-normal) var(--ease-out);
  overflow-y: auto;
}

.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; color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
}

.mobile-nav__link:hover { color: var(--gold); background: var(--gold-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-sm);
}

.mobile-nav__overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.65);
  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: 320px;
  overflow: hidden;
  background: var(--bg-night);
}

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

.inner-banner__overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(10,22,40,0.6) 0%, rgba(10,22,40,0.4) 50%, var(--bg-deep) 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;
}

.inner-banner__title {
  font-size: clamp(1.6rem, 3.5vw, 2.5rem);
  font-weight: 700; color: #fff;
  margin-bottom: 0.5rem;
}

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

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

.breadcrumb {
  display: flex; align-items: center; gap: 8px;
  max-width: var(--container-max);
  margin: 0 auto; padding: 12px 24px;
  font-size: 0.84rem; color: var(--text-muted);
}

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

.breadcrumb i { font-size: 0.6rem; color: var(--text-muted); }

/* ============================================================
   按钮系统
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 26px;
  font-size: 0.9rem; 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(--gold);
  color: #0D1B2A;
}

.btn--primary:hover {
  background: var(--gold-light);
  box-shadow: 0 4px 20px var(--gold-glow);
  transform: translateY(-1px);
  color: #0D1B2A;
}

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

.btn--outline:hover {
  background: var(--gold);
  color: #0D1B2A;
  transform: translateY(-1px);
}

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

.btn--ghost:hover {
  background: rgba(255,255,255,0.06);
  color: var(--text-primary);
}

.btn--white-outline {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255,255,255,0.3);
}

.btn--white-outline:hover {
  border-color: #fff;
  background: rgba(255,255,255,0.08);
  color: #fff;
}

/* ============================================================
   卡片系统 — 深色工业
   ============================================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out);
}

.card:hover {
  border-color: var(--border-gold);
  box-shadow: var(--shadow-card), var(--shadow-gold);
  transform: translateY(-2px);
}

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

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

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

.card__body { padding: 18px 20px; }

.card__tag {
  display: inline-block;
  padding: 3px 10px;
  font-size: 0.7rem; font-weight: 600;
  color: var(--gold);
  background: var(--gold-dim);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
}

.card__title {
  font-family: var(--font-heading);
  font-size: 1rem; 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: 0.85rem; 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: 14px;
  margin-top: 10px; padding-top: 10px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.8rem; color: var(--text-muted);
}

/* 产品卡片特殊样式 */
.card--product .card__specs {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin-top: 10px;
}

.card--product .spec-item {
  font-size: 0.75rem; color: var(--text-muted);
  background: rgba(255,255,255,0.03);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

/* ============================================================
   首页 — Hero Banner
   ============================================================ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  overflow: hidden;
  background: var(--bg-night);
}

.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: 2;
  background: linear-gradient(180deg,
    rgba(10,22,40,0.2) 0%,
    rgba(10,22,40,0.1) 35%,
    rgba(10,22,40,0.8) 100%);
}

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

.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 5vw, 3.5rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 1rem;
  text-shadow: 0 2px 30px rgba(0,0,0,0.5);
  max-width: 700px;
}

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

.hero__subtitle {
  font-size: clamp(0.95rem, 1.5vw, 1.15rem);
  color: rgba(255,255,255,0.7);
  margin-bottom: 2rem;
  font-weight: 300;
  max-width: 560px;
}

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

/* Swiper分页器 */
.hero-pagination {
  display: flex; gap: 8px;
  margin-top: 20px;
}

.hero-pagination .swiper-pagination-bullet {
  width: 36px; height: 3px;
  border-radius: 2px;
  background: rgba(255,255,255,0.3);
  opacity: 1;
  transition: all var(--duration-normal);
}

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

/* 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(255,255,255,0.35);
  font-size: 0.7rem; letter-spacing: 0.14em; text-transform: uppercase;
  animation: scrollFloat 2s ease-in-out infinite;
}

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

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

/* ============================================================
   首页 — 供应数据（数字滚动区）
   ============================================================ */
.stats-section {
  background: var(--bg-night);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.stat-item { text-align: center; }

.stat-item__icon {
  font-size: 1.5rem; color: var(--gold);
  margin-bottom: 12px;
}

.stat-item__number {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4.5vw, 3rem);
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
  margin-bottom: 8px;
  font-variant-numeric: tabular-nums;
}

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

.stat-item__suffix {
  font-size: 1.2rem; color: var(--gold); font-weight: 600;
}

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

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

.category-card:hover {
  border-color: var(--border-gold);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-gold);
}

.category-card__icon {
  width: 56px; height: 56px; margin: 0 auto 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; color: var(--gold);
  background: var(--gold-dim);
  border-radius: var(--radius-sm);
  transition: all var(--duration-normal) var(--ease-out);
}

.category-card:hover .category-card__icon {
  background: var(--gold);
  color: #0D1B2A;
}

.category-card__name {
  font-family: var(--font-heading);
  font-size: 1.05rem; font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

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

/* ============================================================
   首页 — 解决方案
   ============================================================ */
.solution-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.solution-card {
  padding: 36px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  text-align: center;
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.solution-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gold);
  transform: scaleX(0);
  transition: transform var(--duration-normal) var(--ease-out);
}

.solution-card:hover::before { transform: scaleX(1); }

.solution-card:hover {
  border-color: var(--border-gold);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
}

.solution-card__icon {
  font-size: 2rem; color: var(--gold);
  margin-bottom: 14px;
}

.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: 0.85rem; color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================================
   首页 — 品控保障
   ============================================================ */
.quality-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.quality-card {
  text-align: center;
  padding: 40px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  transition: all var(--duration-normal) var(--ease-out);
}

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

.quality-card__icon {
  width: 60px; height: 60px; margin: 0 auto 18px;
  border-radius: 50%;
  background: var(--gold-dim);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; color: var(--gold);
  transition: all var(--duration-normal) var(--ease-out);
}

.quality-card:hover .quality-card__icon {
  background: var(--gold);
  color: #0D1B2A;
  box-shadow: 0 0 24px var(--gold-glow);
}

.quality-card__title {
  font-size: 1.05rem; font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.quality-card__desc {
  font-size: 0.85rem; color: var(--text-secondary);
  line-height: 1.6;
}

/* ============================================================
   首页 — CTA
   ============================================================ */
.cta-section {
  text-align: center;
  padding: 80px 0;
  background: var(--bg-night);
  border-top: 1px solid var(--border-subtle);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(201,169,110,0.05) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section__title {
  font-size: clamp(1.6rem, 3.5vw, 2.3rem);
  margin-bottom: 0.8rem;
  color: var(--text-primary);
}

.cta-section__desc {
  font-size: 1rem; color: var(--text-secondary);
  margin-bottom: 28px;
  max-width: 560px; margin-left: auto; margin-right: auto;
}

/* ============================================================
   列表页 — 产品列表
   ============================================================ */
.page-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 36px;
  align-items: start;
}

/* 侧边栏 */
.sidebar {
  position: sticky; top: 92px;
}

.sidebar__title {
  font-family: var(--font-heading);
  font-size: 1.15rem; font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--gold);
}

.sidebar__subtitle {
  font-size: 0.78rem; color: var(--text-muted);
  margin-bottom: 16px;
}

.sidebar-nav { display: flex; flex-direction: column; gap: 2px; }

.sidebar-nav a {
  display: block; padding: 10px 14px;
  font-size: 0.9rem; color: var(--text-secondary);
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
  transition: all var(--duration-fast) var(--ease-out);
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
  color: var(--gold);
  background: var(--gold-dim);
  border-left-color: var(--gold);
}

/* 搜索框 */
.sidebar-search {
  position: relative; margin-bottom: 16px;
}

.sidebar-search input {
  width: 100%; padding: 10px 14px 10px 36px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.88rem;
  transition: border-color var(--duration-fast);
}

.sidebar-search input:focus {
  outline: none;
  border-color: var(--gold);
}

.sidebar-search i {
  position: absolute; left: 12px; top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted); font-size: 0.85rem;
}

/* 产品网格 */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

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

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

.list-header h1 {
  font-size: clamp(1.5rem, 3.5vw, 2.2rem);
  margin-bottom: 0.5rem;
}

/* 子栏目过滤栏 */
.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: 7px 16px;
  font-size: 0.84rem; font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  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: var(--gold);
  border-color: var(--gold);
  background: var(--gold-dim);
}

/* ============================================================
   产品详情页
   ============================================================ */
.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.product-gallery {
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
}

.product-gallery img {
  width: 100%; aspect-ratio: 1;
  object-fit: cover;
}

.product-gallery .swiper-pagination {
  position: relative; margin-top: 10px; padding-bottom: 10px;
}

.product-gallery .swiper-pagination-bullet { background: var(--text-muted); }
.product-gallery .swiper-pagination-bullet-active { background: var(--gold); }

.product-info__title {
  font-size: 1.6rem; font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.product-info__subtitle {
  font-size: 0.9rem; color: var(--text-muted);
  margin-bottom: 20px;
}

/* 规格参数表 */
.specs-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 24px;
}

.specs-table tr {
  border-bottom: 1px solid var(--border-subtle);
}

.specs-table td {
  padding: 12px 0;
  font-size: 0.9rem;
}

.specs-table td:first-child {
  color: var(--text-muted);
  width: 110px;
}

.specs-table td:last-child {
  color: var(--text-primary);
  font-weight: 500;
}

/* Tab切换 */
.tabs {
  display: flex; gap: 0;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 24px;
}

.tab-btn {
  padding: 12px 20px;
  font-size: 0.88rem; font-weight: 600;
  color: var(--text-muted);
  background: none; border: none; cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all var(--duration-fast) var(--ease-out);
}

.tab-btn:hover { color: var(--text-secondary); }

.tab-btn.active {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

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

/* 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: 20px 0;
  max-width: 100%;
}

.detail__body p { margin-bottom: 14px; }
.detail__body h2, .detail__body h3 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  margin-top: 28px; margin-bottom: 14px;
}

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

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

.detail__title {
  font-size: clamp(1.4rem, 2.8vw, 2rem);
  margin-bottom: 10px;
}

.detail__meta-row {
  display: flex; flex-wrap: wrap; gap: 18px;
  font-size: 0.84rem; color: var(--text-muted);
}

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

.detail__pager {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 44px; padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.86rem; color: var(--text-muted);
}

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

/* 相关推荐 */
.related-title {
  font-size: 1.25rem; font-weight: 700;
  margin: 52px 0 20px;
  color: var(--text-primary);
}

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

/* ============================================================
   新闻列表
   ============================================================ */
.news-list { display: flex; flex-direction: column; gap: 0; }

.news-item {
  display: flex; gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--duration-fast) var(--ease-out);
}

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

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

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

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

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

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

.news-item:hover .news-item__title { color: var(--gold); }

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

.news-item__desc {
  font-size: 0.88rem; color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.7;
}

/* ============================================================
   案例列表
   ============================================================ */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.case-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out);
}

.case-card:hover {
  border-color: var(--border-gold);
  transform: translateY(-3px);
}

.case-card__image {
  aspect-ratio: 16/10;
  overflow: hidden;
  background: var(--bg-night);
}

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

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

.case-card__body {
  padding: 16px 18px;
}

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

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

.case-card__overlay {
  position: absolute; inset: 0;
  background: rgba(10,22,40,0.7);
  opacity: 0;
  transition: opacity var(--duration-normal);
  display: flex; align-items: center; justify-content: center;
}

.case-card:hover .case-card__overlay { opacity: 1; }

.case-card__overlay span {
  color: var(--gold); font-weight: 600;
  border: 1px solid var(--gold);
  padding: 10px 22px; border-radius: var(--radius-sm);
}

/* ============================================================
   联系我们/询价页
   ============================================================ */
.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: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  transition: all var(--duration-fast) var(--ease-out);
}

.contact-info__item:hover { border-color: var(--border-gold); }

.contact-info__icon {
  width: 42px; height: 42px;
  border-radius: var(--radius-sm);
  background: var(--gold-dim);
  display: flex; align-items: center; justify-content: center;
  color: var(--gold); flex-shrink: 0;
}

.contact-info__label {
  font-size: 0.78rem; font-weight: 600;
  color: var(--text-primary); margin-bottom: 2px;
}

.contact-info__value {
  font-size: 0.86rem; color: var(--text-secondary);
}

/* 表单 */
.form-card {
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
}

/* 表单双列行（原先是写死的行内 style，手机端没法覆盖） */
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

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

.form-group label {
  display: block;
  font-size: 0.84rem; color: var(--text-secondary);
  margin-bottom: 5px;
}

.form-group label .required { color: #E74C3C; }

.form-control {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.88rem;
  transition: all var(--duration-fast) var(--ease-out);
}

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

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

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='%2364748B' 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: 36px;
}

/* ============================================================
   搜索页
   ============================================================ */
.search-box { max-width: 680px; margin: 0 auto; }

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

.search-form-row input {
  flex: 1;
  padding: 14px 18px 14px 42px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.94rem;
}

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

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

.search-input-wrap i {
  position: absolute; left: 15px; top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted); font-size: 0.9rem;
}

/* 搜索结果 */
.search-result-item {
  display: flex; gap: 16px;
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
  margin-bottom: 8px;
}

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

.search-result-item__thumb {
  width: 100px; height: 75px;
  border-radius: var(--radius-sm);
  overflow: hidden; flex-shrink: 0;
  background: var(--bg-input);
}

.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: 0.98rem; font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 3px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.search-result-item__date {
  font-size: 0.76rem; color: var(--text-muted);
  margin-bottom: 3px;
}

.search-result-item__desc {
  font-size: 0.84rem; 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: 40px;
}

.pagination a,
.pagination span {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 38px; height: 38px;
  padding: 0 8px;
  font-size: 0.86rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
}

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

.pagination .active {
  background: var(--gold);
  color: #0D1B2A;
  font-weight: 600;
}

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

.empty-state i {
  font-size: 2.5rem; color: var(--text-muted);
  margin-bottom: 14px; display: block;
}

.empty-state p {
  color: var(--text-muted); font-size: 0.94rem;
}

/* ============================================================
   Footer 底部
   ============================================================ */
.footer {
  background: var(--bg-night);
  border-top: 1px solid var(--border-subtle);
}

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

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  padding: 56px 0 36px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: 24px; padding-right: 24px;
}

.footer__brand-desc {
  font-size: 0.86rem; color: var(--text-secondary);
  line-height: 1.7; margin: 14px 0;
}

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

.footer__social a {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.04);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted); font-size: 0.9rem;
  transition: all var(--duration-fast) var(--ease-out);
}

.footer__social a:hover {
  background: var(--gold);
  color: #0D1B2A;
}

.footer__col-title {
  font-family: var(--font-heading);
  font-size: 0.98rem; font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 18px;
}

.footer__links { display: flex; flex-direction: column; gap: 9px; }

.footer__links a {
  font-size: 0.86rem; color: var(--text-secondary);
  transition: color var(--duration-fast);
}

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

.footer__contact-item {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 0.84rem; color: var(--text-secondary);
  margin-bottom: 9px;
}

.footer__contact-item i {
  color: var(--gold); margin-top: 3px; flex-shrink: 0;
}

.footer__qrcode {
  width: 110px; height: 110px;
  background: #fff;
  border-radius: var(--radius-sm);
  padding: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.68rem; color: #999;
}

.footer__qr-text {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 10px;
}

.footer__bottom {
  border-top: 1px solid var(--border-subtle);
  padding: 18px 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: 0.78rem; color: var(--text-muted);
  flex-wrap: wrap; gap: 8px;
}

.footer__bottom a {
  color: var(--text-muted);
  transition: color var(--duration-fast);
}

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

/* ============================================================
   友情链接
   ============================================================ */
.friend-links {
  display: flex; flex-wrap: wrap; gap: 14px; align-items: center;
  padding: 14px 0;
}

.friend-links__label {
  font-size: 0.8rem; color: var(--text-muted); flex-shrink: 0;
}

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

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

/* ============================================================
   返回顶部
   ============================================================ */
.back-top {
  position: fixed; right: 20px; bottom: 80px;
  width: 40px; height: 40px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem; cursor: pointer;
  z-index: 80;
  opacity: 0; pointer-events: none;
  transition: all var(--duration-normal) var(--ease-out);
}

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

.back-top:hover {
  background: var(--gold);
  color: #0D1B2A;
  border-color: var(--gold);
}

/* ============================================================
   动画系统
   ============================================================ */

/* 区块入场 */
[data-aos] { transition-timing-function: var(--ease-out); }

/* 金色光晕呼吸 */
@keyframes goldBreath {
  0%, 100% { box-shadow: 0 0 8px rgba(201, 169, 110, 0.1); }
  50% { box-shadow: 0 0 24px rgba(201, 169, 110, 0.3); }
}

/* 按钮脉冲 */
@keyframes btnPulse {
  0% { box-shadow: 0 0 0 0 rgba(201, 169, 110, 0.4); }
  70% { box-shadow: 0 0 0 12px rgba(201, 169, 110, 0); }
  100% { box-shadow: 0 0 0 0 rgba(201, 169, 110, 0); }
}

.btn--primary.pulse { animation: btnPulse 2s infinite; }

/* 数字滚动 */
.stat-item__number {
  background: linear-gradient(180deg, var(--gold-light), var(--gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 卡片入场延迟 */
.card[data-aos] {
  transition: all var(--duration-normal) var(--ease-out);
}

/* ============================================================
   在线客服按钮
   ============================================================ */
.kefu-btn {
  position: fixed; right: 20px; bottom: 130px;
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--gold);
  color: #0D1B2A;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; cursor: pointer;
  z-index: 80;
  box-shadow: 0 4px 20px var(--gold-glow);
  transition: all var(--duration-normal) var(--ease-out);
  animation: goldBreath 2.5s ease-in-out infinite;
}

.kefu-btn:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 28px rgba(201, 169, 110, 0.4);
}

/* ============================================================
   响应式 — 平板 (768px - 1023px)
   ============================================================ */
@media (max-width: 1023px) {
  :root { --section-py: 60px; }

  .header__nav, .header__actions { display: none; }
  .hamburger { display: flex; }

  .stats { grid-template-columns: repeat(2, 1fr); gap: 24px 16px; }
  .category-grid { grid-template-columns: repeat(3, 1fr); }
  .solution-grid { grid-template-columns: repeat(2, 1fr); }
  .quality-grid { grid-template-columns: repeat(2, 1fr); }

  .page-layout {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: static;
    margin-bottom: 24px;
  }
  .sidebar-nav { flex-direction: row; flex-wrap: wrap; gap: 6px; }
  .sidebar-nav a { border-left: none; border-bottom: 2px solid transparent; }

  .list-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .product-detail { grid-template-columns: 1fr; gap: 32px; }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .related-grid { grid-template-columns: repeat(2, 1fr); }

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

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

/* ============================================================
   响应式 — 移动端 (< 768px)
   ============================================================ */
@media (max-width: 767px) {
  :root { --section-py: 34px; --header-h: 60px; }

  .container { padding: 0 16px; }
  .section { padding: 34px 0; }

  /* ---------- 标题组 ---------- */
  .section-head { margin-bottom: 20px; }
  .section-head--row { align-items: center; }
  .section-title { font-size: 1.35rem; }
  .section-subtitle { font-size: 0.86rem; line-height: 1.6; }
  .section-tag { font-size: 0.68rem; margin-bottom: 0.45rem; }
  .list-header { margin-bottom: 20px; }

  /* ---------- Hero ---------- */
  .hero { height: 58vh; min-height: 380px; max-height: 460px; }
  .hero__content { padding-bottom: 44px; padding-left: 16px; padding-right: 16px; }
  .hero__title { font-size: 1.8rem; margin-bottom: 0.6rem; }
  .hero__subtitle { font-size: 0.9rem; margin-bottom: 1.1rem; }
  .hero__actions { gap: 10px; }
  .hero__actions .btn { flex: 1 1 auto; justify-content: center; padding: 11px 18px; font-size: 0.88rem; }
  .hero-pagination { bottom: 16px; }
  .hero__scroll { display: none; }

  /* ---------- 内页 Banner / 面包屑 ---------- */
  /* 压到 180px 后内容会顶到固定头部下面，用 padding-top 让出头部高度 */
  .inner-banner { height: 180px !important; padding-top: var(--header-h); }
  .inner-banner__title { font-size: 1.45rem; }
  .inner-banner__subtitle { font-size: 0.86rem; }
  .breadcrumb { padding: 9px 16px; font-size: 0.76rem; }

  /* ---------- 横滑轨道通用规则 ---------- */
  .category-grid,
  .product-grid--scroll,
  .solution-grid,
  .quality-grid,
  .case-grid--scroll,
  .related-grid {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
    /* 左右出血到屏幕边缘，让下一张露出一角作为滑动提示 */
    margin-left: -16px;
    margin-right: -16px;
    padding: 2px 16px 10px;
    scroll-padding-left: 16px;
  }
  .category-grid::-webkit-scrollbar,
  .product-grid--scroll::-webkit-scrollbar,
  .solution-grid::-webkit-scrollbar,
  .quality-grid::-webkit-scrollbar,
  .case-grid--scroll::-webkit-scrollbar,
  .related-grid::-webkit-scrollbar { display: none; }

  .category-grid > *,
  .product-grid--scroll > *,
  .solution-grid > *,
  .quality-grid > *,
  .case-grid--scroll > *,
  .related-grid > * {
    flex-grow: 0;
    flex-shrink: 0;
    scroll-snap-align: start;
  }
  .category-grid > * { flex-basis: 46%; }
  .product-grid--scroll > * { flex-basis: 74%; }
  .solution-grid > * { flex-basis: 72%; }
  .quality-grid > * { flex-basis: 72%; }
  .case-grid--scroll > * { flex-basis: 78%; }
  .related-grid > * { flex-basis: 74%; }

  /* ---------- 横滑指示点（由 main.js 注入） ---------- */
  .hscroll-dots { display: flex; justify-content: center; gap: 5px; margin-top: 2px; }
  .hscroll-dots span {
    width: 5px; height: 5px; border-radius: 50%;
    background: var(--border-subtle);
    transition: all var(--duration-fast) var(--ease-out);
  }
  .hscroll-dots span.on { width: 16px; border-radius: 3px; background: var(--gold); }

  /* ---------- 数据 ---------- */
  .stats-section { padding: 22px 0; }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 18px 12px; }
  .stat-item__icon { font-size: 1.15rem; margin-bottom: 7px; }
  .stat-item__number { font-size: 1.6rem; margin-bottom: 4px; }
  .stat-item__label { font-size: 0.76rem; }

  /* ---------- 产品分类卡 ---------- */
  .category-card { padding: 20px 12px; }
  .category-card__icon { width: 46px; height: 46px; font-size: 1.15rem; margin-bottom: 10px; }
  .category-card__title { font-size: 0.92rem; }
  .category-card__desc { font-size: 0.74rem; line-height: 1.5; }

  /* ---------- 产品卡 ---------- */
  .card__body { padding: 12px; }
  .card__tag { font-size: 0.64rem; padding: 2px 8px; margin-bottom: 6px; }
  .card__title { font-size: 0.9rem; }
  .card__meta { font-size: 0.7rem; gap: 8px; margin-top: 8px; padding-top: 8px; }

  /* ---------- 解决方案卡 ---------- */
  .solution-card { padding: 20px 14px; }
  .solution-card__icon { width: 46px; height: 46px; font-size: 1.15rem; margin-bottom: 10px; }
  .solution-card__title { font-size: 0.98rem; }
  .solution-card__desc { font-size: 0.8rem; line-height: 1.6; }

  /* ---------- 品质卡 ---------- */
  .quality-card { padding: 20px 12px; }
  .quality-card__icon { width: 46px; height: 46px; font-size: 1.15rem; margin-bottom: 10px; }
  .quality-card__title { font-size: 0.95rem; }
  .quality-card__desc { font-size: 0.78rem; line-height: 1.6; }

  /* ---------- 案例卡 ---------- */
  .case-card__body { padding: 12px 14px; }
  .case-card__title { font-size: 0.92rem; }
  .case-card__tag { font-size: 0.68rem; }

  /* ---------- 新闻列表：保持左图右文，只把缩略图收小 ---------- */
  .news-item { flex-direction: row; gap: 12px; padding: 12px 0; }
  .news-item__thumb { width: 108px; height: 78px; }
  .news-item__date { font-size: 0.68rem; margin-bottom: 3px; }
  .news-item__title { font-size: 0.88rem; margin-bottom: 3px; }
  .news-item__desc { font-size: 0.76rem; line-height: 1.55; }

  /* ---------- 列表页：目录型 → 2 列，便于扫全 ---------- */
  /* minmax(0,1fr)：1fr 的最小宽度是 auto，会被 sidebar/filter-bar 的内容顶宽 */
  .page-layout { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .sidebar { position: static; min-width: 0; margin-bottom: 0; }
  .sidebar-nav { flex-direction: row; flex-wrap: wrap; gap: 6px; }
  .list-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .product-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .case-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  /* 筛选条：不换行会横着溢出，换行让分类全部可见 */
  .filter-bar { flex-wrap: wrap; overflow-x: visible; gap: 6px; padding-bottom: 10px; }
  .filter-bar a { font-size: 0.76rem; padding: 5px 11px; }
  .pagination { margin-top: 22px; }
  .pagination a { min-width: 34px; height: 34px; font-size: 0.78rem; }

  /* ---------- 详情页 ---------- */
  .product-detail { grid-template-columns: 1fr; gap: 20px; }
  .detail__body { font-size: 0.88rem; line-height: 1.8; }
  .detail__body p { margin-bottom: 12px; }
  .detail__body h2 { font-size: 1.15rem; margin: 20px 0 10px; }
  .detail__body h3 { font-size: 1rem; margin: 16px 0 6px; }
  .detail__params { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .related-title { font-size: 1.05rem; margin: 24px 0 14px; }

  /* Tab 标签：不加 nowrap 会被挤成两行 */
  .tabs {
    margin-bottom: 16px;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }
  .tabs::-webkit-scrollbar { display: none; }
  .tab-btn { flex: 0 0 auto; white-space: nowrap; padding: 10px 13px; font-size: 0.8rem; }

  /* 上下篇：三个元素挤一行会把「返回列表」竖成一条，改成上中下两行 */
  .detail__pager {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    align-items: start;
    margin-top: 24px;
    padding-top: 16px;
    font-size: 0.76rem;
    line-height: 1.5;
  }
  .detail__pager a { grid-column: 1 / -1; grid-row: 1; text-align: center; }
  .detail__pager span { grid-row: 2; }
  .detail__pager span:first-of-type { grid-column: 1; }
  .detail__pager span:last-of-type { grid-column: 2; text-align: right; }

  /* ---------- 联系 / 询价 ---------- */
  .contact-grid { grid-template-columns: 1fr; gap: 22px; }
  .contact-info__item { padding: 12px; gap: 10px; }
  .contact-info__icon { width: 38px; height: 38px; font-size: 0.9rem; }
  /* 手机端表单改单列：双列时 select 的选项文字会被原生箭头压掉一截 */
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .form-group { margin-bottom: 14px; }
  .form-group label { font-size: 0.8rem; }
  .form-control { padding: 10px 12px; font-size: 0.86rem; }
  select.form-control { padding-right: 30px; background-position: right 12px center; }

  /* ---------- CTA ---------- */
  .cta-section { padding: 34px 0; }
  .cta-section__title { font-size: 1.3rem; }
  .cta-section .btn { width: 100%; justify-content: center; }

  /* ---------- 搜索页 ---------- */
  .search-result-item { flex-direction: column; gap: 10px; padding: 12px; }
  .search-result-item__thumb { width: 100%; height: 140px; }

  /* ---------- Footer：四列改两列 + 通栏 ---------- */
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 22px 18px;
    padding: 26px 16px 20px;
  }
  .footer__grid > div:first-child { grid-column: 1 / -1; }
  .footer__brand-desc { font-size: 0.78rem; line-height: 1.6; margin: 10px 0; }
  .footer__social a { width: 32px; height: 32px; font-size: 0.82rem; }
  .footer__col-title { font-size: 0.86rem; margin-bottom: 10px; }
  .footer__links { gap: 6px; }
  .footer__links a { font-size: 0.78rem; }
  .footer__contact-item { font-size: 0.76rem; margin-bottom: 7px; gap: 8px; }
  /* 关注我们：通栏 + 二维码与说明横向排布 */
  .footer__grid > div:last-child {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    gap: 14px;
  }
  .footer__grid > div:last-child .footer__col-title { display: none; }
  .footer__qrcode { width: 74px; height: 74px; flex-shrink: 0; font-size: 0.64rem; padding: 4px; }
  .footer__qr-text { font-size: 0.74rem; margin-top: 0; }
  .footer__bottom-inner { flex-direction: column; text-align: center; padding: 0 16px; font-size: 0.72rem; }

  /* ---------- 浮动按钮 ---------- */
  .back-top { right: 12px; bottom: 74px; }
  .kefu-btn { right: 12px; bottom: 124px; width: 42px; height: 42px; }
}

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