/**
 * 彩域涂料 — 建筑装饰涂料企业官网样式
 * 明亮清新空间美学：白 + 浅灰 + 色彩点缀 + 木色
 * 纯白卡片 + 浅色边框/轻阴影 + 大留白 + 图文错落
 * 原生 CSS，无框架依赖
 * 架构：第三方模板模式（{pboot:sitedomain}/skin/）
 */

/* Google Fonts — Noto Sans SC (简体中文现代无衬线) */


/* ============================================================
   CSS 变量体系
   ============================================================ */
:root {
  /* 基底色 — 明亮白底 */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F5F6F8;
  --bg-warm: #FAF8F5;
  --bg-card: #FFFFFF;

  /* 主色 — 品牌涂料色 */
  --brand-blue: #2563EB;
  --brand-teal: #0D9488;
  --brand-orange: #F59E0B;
  --brand-warm: #EF4444;

  /* 点缀色 — 色彩卡展示用 */
  --accent-sky: #E0F2FE;
  --accent-mint: #D1FAE5;
  --accent-cream: #FEF3C7;
  --accent-rose: #FFE4E6;
  --accent-lavender: #EDE9FE;

  /* 木色系 */
  --wood-light: #E8D5B7;
  --wood-mid: #C4A882;

  /* 文字色阶 */
  --text-primary: #111827;
  --text-secondary: #4B5563;
  --text-muted: #9CA3AF;

  /* 边框 */
  --border-light: #E5E7EB;
  --border-medium: #D1D5DB;
  --border-accent: rgba(37, 99, 235, 0.2);

  /* 阴影 (浅色轻阴影) */
  --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, 0.10);

  /* 圆角 — 大圆角亲切感 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* 间距 */
  --section-py: 100px;
  --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 */
  --font-heading: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ============================================================
   Reset & Base
   ============================================================ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; transition: color var(--duration-fast) var(--ease-out); }
ul, ol { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }
input, textarea, select { font: inherit; color: inherit; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: 1.3;
  font-weight: 700;
}

/* ============================================================
   Container
   ============================================================ */
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }

/* ============================================================
   Section
   ============================================================ */
.section { padding: var(--section-py) 24px; }
@media (max-width: 768px) { .section { padding: 64px 16px; } }

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

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brand-blue);
  margin-bottom: 10px;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 40px;
}

@media (max-width: 768px) {
  .section-title { font-size: 1.5rem; }
}

/* 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--row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.section-head .section-subtitle { margin-bottom: 0; }
.section-head--center .section-subtitle { margin-left: auto; margin-right: auto; }

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 24px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all var(--duration-normal) var(--ease-out);
  white-space: nowrap;
}

.btn--primary {
  background: var(--brand-blue);
  color: #fff;
  border: 2px solid var(--brand-blue);
}

.btn--primary:hover { background: #1D4ED8; border-color: #1D4ED8; transform: translateY(-1px); box-shadow: var(--shadow-md); }

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

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

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

.btn--ghost:hover { border-color: var(--text-secondary); color: var(--text-primary); }

.btn--warm {
  background: var(--brand-orange);
  color: #fff;
  border: none;
}

.btn--warm:hover { background: #D97706; transform: translateY(-1px); box-shadow: 0 4px 16px rgba(245, 158, 11, 0.3); }

/* ============================================================
   Header (白色半透背景)
   ============================================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  transition: box-shadow var(--duration-normal) var(--ease-out);
}

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

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

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

.header__logo-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--brand-blue), var(--brand-teal));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: #fff;
}

.header__logo-name {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.header__logo-sub {
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
}

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

.header__nav a,
.header__nav-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 50px;
  transition: all var(--duration-fast) var(--ease-out);
}

.header__nav a:hover,
.header__nav-link:hover,
.header__nav-link.active { color: var(--brand-blue); background: #EFF6FF; }

/* Dropdown (z-index:10) */
.header__nav-item { position: relative; }
.header__nav-item > a:first-child { display: inline-flex; align-items: center; }

.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: 8px 0;
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--duration-normal) var(--ease-out);
  z-index: 10;
}

.header__dropdown a {
  display: block;
  padding: 10px 20px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  border-radius: 0;
}

.header__dropdown a:hover { color: var(--brand-blue); background: #F0F7FF; }

/* Header actions */
.header__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: 20px;
}

.header__cta {
  padding: 8px 20px;
  border-radius: 50px;
  background: var(--brand-orange);
  color: #fff !important;
  font-size: 0.82rem;
  font-weight: 600;
  white-space: nowrap;
  transition: all var(--duration-normal) var(--ease-out);
}

.header__cta:hover { box-shadow: 0 4px 16px rgba(245, 158, 11, 0.3); }

/* Hamburger (独立于 header__actions) */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  margin-left: 12px;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  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; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ============================================================
   Mobile Nav (z-index:30)
   ============================================================ */
.mobile-nav {
  position: fixed;
  top: 0;
  left: -320px;
  width: 280px;
  height: 100vh;
  z-index: 30;
  background: #fff;
  border-right: 1px solid var(--border-light);
  box-shadow: var(--shadow-lg);
  transition: left var(--duration-slow) var(--ease-out);
  overflow-y: auto;
  padding: 28px 20px;
}

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

.mobile-nav__link {
  display: block;
  padding: 12px 16px;
  font-size: 1rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
}

.mobile-nav__link:hover { color: var(--brand-blue); background: #EFF6FF; }

.mobile-nav__sub {
  padding-left: 20px;
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-normal) var(--ease-out);
}

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

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

.mobile-nav__overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
  z-index: 29;
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-normal) var(--ease-out);
}

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

/* ============================================================
   Hero Banner
   ============================================================ */
.hero {
  position: relative;
  height: 85vh;
  min-height: 520px;
  max-height: 700px;
  overflow: hidden;
  background: var(--bg-secondary);
}

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

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

.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, rgba(255,255,255,0.4) 40%, rgba(255,255,255,0.7) 100%);
}

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

.hero__title {
  font-size: 3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  line-height: 1.2;
  max-width: 700px;
}

.hero__subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 540px;
}

@media (max-width: 768px) {
  .hero { height: 60vh; min-height: 400px; }
  .hero__title { font-size: 1.8rem; }
  .hero__subtitle { font-size: 0.95rem; }
}

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

.hero-pagination {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  gap: 8px;
}

.hero-pagination .swiper-pagination-bullet {
  width: 8px;
  height: 8px;
  background: var(--border-medium);
  border-radius: 50%;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
}

.hero-pagination .swiper-pagination-bullet-active {
  background: var(--brand-blue);
  width: 24px;
  border-radius: 4px;
}

/* ============================================================
   Color Cards (色卡展示)
   ============================================================ */
.color-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 12px;
  max-width: 1200px;
}

.color-card {
  aspect-ratio: 1;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  padding: 12px 8px;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
}

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

.color-card__code {
  font-size: 0.7rem;
  font-weight: 600;
  color: rgba(0,0,0,0.5);
  margin-bottom: 4px;
}

.color-card__name {
  font-size: 0.75rem;
  font-weight: 500;
  color: rgba(0,0,0,0.6);
}

/* ============================================================
   Category Cards (产品分类)
   ============================================================ */
.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

@media (max-width: 1024px) { .category-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .category-grid { grid-template-columns: 1fr; } }

.category-card {
  display: block;
  text-align: center;
  padding: 40px 24px;
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  transition: all var(--duration-normal) var(--ease-out);
}

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

.category-card__icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-lg);
  background: #EFF6FF;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 1.5rem;
  color: var(--brand-blue);
}

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

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

/* ============================================================
   Product/Solution Cards
   ============================================================ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 1024px) { .card-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .card-grid { grid-template-columns: 1fr; } }

.card {
  display: block;
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out);
}

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

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

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

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

.card__body { padding: 20px; }

.card__tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--brand-blue);
  background: #EFF6FF;
  padding: 3px 10px;
  border-radius: 100px;
  margin-bottom: 10px;
}

.card__title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-primary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card__desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.card__meta span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--bg-secondary);
  padding: 3px 10px;
  border-radius: 4px;
}

/* ============================================================
   Features / Certifications (3列图标特征)
   ============================================================ */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 768px) { .features { grid-template-columns: 1fr; } }

.feature-card {
  text-align: center;
  padding: 36px 24px;
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  transition: all var(--duration-normal) var(--ease-out);
}

.feature-card:hover { border-color: var(--brand-teal); box-shadow: var(--shadow-sm); }

.feature-card__icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: #ECFDF5;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
  font-size: 1.75rem;
  color: var(--brand-teal);
}

.feature-card__title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card__desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================================
   Case Grid (工程案例)
   ============================================================ */
.case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

@media (max-width: 768px) { .case-grid { grid-template-columns: 1fr; } }

.case-card {
  display: block;
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 16/10;
  background: var(--bg-secondary);
}

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

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

.case-card__info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 24px 20px;
  background: linear-gradient(0deg, rgba(0,0,0,0.7) 0%, transparent 100%);
}

.case-card__title {
  font-size: 1.1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 4px;
}

.case-card__tag {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.75);
}

/* ============================================================
   News Section
   ============================================================ */
.news-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px 40px;
  align-items: start;
}

@media (max-width: 768px) { .news-section { grid-template-columns: 1fr; } }

.news-featured {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--border-light);
}

.news-featured__image {
  aspect-ratio: 16/10;
  overflow: hidden;
}

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

.news-featured:hover .news-featured__image img { transform: scale(1.04); }

.news-featured__body { padding: 24px; }

.news-featured__title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.news-featured__desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
}

.news-list-item {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-light);
  transition: all var(--duration-fast) var(--ease-out);
}

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

.news-list-item__thumb {
  width: 100px;
  height: 72px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--bg-secondary);
}

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

.news-list-item__date {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.news-list-item__title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* ============================================================
   CTA Bar (获取色卡)
   ============================================================ */
.cta-bar {
  text-align: center;
  padding: 60px 24px;
  background: linear-gradient(135deg, #EFF6FF, #ECFDF5);
  border-top: 1px solid var(--border-light);
}

.cta-bar__title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.cta-bar__desc {
  color: var(--text-secondary);
  margin-bottom: 28px;
  font-size: 1.05rem;
}

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

/* ============================================================
   Inner Banner (内页Banner)
   ============================================================ */
.inner-banner {
  position: relative;
  height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--bg-secondary);
}

@media (max-width: 768px) { .inner-banner { height: 200px; } }

.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(255,255,255,0.5) 0%, rgba(255,255,255,0.7) 100%);
  z-index: 1;
}

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

.inner-banner__title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
}

.inner-banner__subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-top: 6px;
}

/* ============================================================
   Breadcrumb
   ============================================================ */
.breadcrumb-bar {
  background: #fff;
  border-bottom: 1px solid var(--border-light);
  padding: 12px 0;
}

.breadcrumb {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

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

/* ============================================================
   Filter Bar (子分类过滤)
   ============================================================ */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 14px 0;
  flex-wrap: wrap;
}

.filter-bar a {
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  border: 1px solid var(--border-light);
  transition: all var(--duration-fast) var(--ease-out);
}

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

/* ============================================================
   Pagination
   ============================================================ */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 48px 0 0;
  flex-wrap: wrap;
}

.pagination a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 10px;
  border-radius: 50px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  border: 1px solid var(--border-light);
  transition: all var(--duration-fast) var(--ease-out);
}

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

/* ============================================================
   Empty State
   ============================================================ */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-state i { font-size: 2.5rem; margin-bottom: 16px; opacity: 0.4; }

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

.detail-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

@media (max-width: 768px) { .detail-layout { grid-template-columns: 1fr; gap: 32px; } }

.detail__gallery {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-secondary);
}

.detail__gallery .swiper-slide img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.detail__title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 12px;
}

@media (max-width: 768px) { .detail__title { font-size: 1.35rem; } }

.detail__subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* Specs Table */
.specs-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 24px;
}

.specs-table td {
  padding: 10px 0;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.9rem;
}

.specs-table td:first-child { color: var(--text-muted); width: 40%; }
.specs-table td:last-child { font-weight: 500; color: var(--text-primary); }

/* Tabs */
.detail__tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border-light);
  margin: 40px 0 24px;
}

.detail__tabs a {
  padding: 12px 24px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all var(--duration-fast) var(--ease-out);
}

.detail__tabs a:hover,
.detail__tabs a.active {
  color: var(--brand-blue);
  border-bottom-color: var(--brand-blue);
}

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

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

.detail__body p { margin-bottom: 14px; }
.detail__body img { max-width: 100%; border-radius: var(--radius-md); margin: 20px 0; }

/* Prev/Next */
.detail__pager {
  display: flex;
  justify-content: space-between;
  padding: 32px 0;
  border-top: 1px solid var(--border-light);
  margin-top: 40px;
  font-size: 0.88rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 10px;
}

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

/* ============================================================
   Color Center Gallery
   ============================================================ */
.color-center-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 16px;
}

.color-swatch {
  aspect-ratio: 3/4;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-normal) var(--ease-out);
}

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

.color-swatch__chip {
  height: 70%;
  display: flex;
  align-items: flex-end;
  padding: 12px;
}

.color-swatch__info {
  padding: 12px;
  background: #fff;
  text-align: center;
}

.color-swatch__code {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-primary);
}

.color-swatch__name {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ============================================================
   Solution Blocks
   ============================================================ */
.solution-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 48px 0;
  border-bottom: 1px solid var(--border-light);
}

.solution-block:last-child { border-bottom: none; }

@media (max-width: 768px) { .solution-block { grid-template-columns: 1fr; gap: 24px; } }

.solution-block:nth-child(even) .solution-block__image { order: -1; }

@media (max-width: 768px) { .solution-block:nth-child(even) .solution-block__image { order: 0; } }

.solution-block__image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--bg-secondary);
}

.solution-block__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.solution-block__title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.solution-block__desc {
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ============================================================
   Contact Grid
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 48px;
}

@media (max-width: 768px) { .contact-grid { grid-template-columns: 1fr; } }

.contact-info-card {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.contact-info__item {
  display: flex;
  gap: 14px;
  margin-bottom: 20px;
}

.contact-info__icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #EFF6FF;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--brand-blue);
}

.contact-info__label { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 2px; }
.contact-info__value { font-size: 0.95rem; color: var(--text-secondary); font-weight: 500; }

/* ============================================================
   Form Controls
   ============================================================ */
.form-group { margin-bottom: 18px; }

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

.required { color: var(--brand-warm); }

.form-control {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-medium);
  background: #fff;
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  transition: border var(--duration-fast) var(--ease-out), box-shadow var(--duration-fast) var(--ease-out);
}

.form-control:focus { border-color: var(--brand-blue); box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1); }

select.form-control {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%239CA3AF' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}

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

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

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

@media (max-width: 640px) { .search-form-row { flex-direction: column; } }

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

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

.search-input-wrap input {
  width: 100%;
  padding: 14px 16px 14px 44px;
  border-radius: 50px;
  border: 1px solid var(--border-medium);
  background: #fff;
  color: var(--text-primary);
  font-size: 0.95rem;
  outline: none;
  transition: border var(--duration-fast) var(--ease-out);
}

.search-input-wrap input:focus { border-color: var(--brand-blue); }

.search-result-item {
  display: flex;
  gap: 20px;
  padding: 20px;
  border-bottom: 1px solid var(--border-light);
  transition: background var(--duration-fast);
}

.search-result-item:hover { background: #F9FAFB; }

@media (max-width: 640px) { .search-result-item { flex-direction: column; } }

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

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

.search-result-item__title { font-size: 1.05rem; font-weight: 600; margin-bottom: 4px; }
.search-result-item__date { font-size: 0.78rem; color: var(--text-muted); margin-bottom: 4px; }
.search-result-item__desc { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.6; }

/* ============================================================
   Footer (浅色背景)
   ============================================================ */
.footer {
  background: #F9FAFB;
  border-top: 1px solid var(--border-light);
}

.footer__grid {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 56px 24px 40px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1fr 1fr;
  gap: 40px;
}

@media (max-width: 1024px) { .footer__grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .footer__grid { grid-template-columns: 1fr; } }

.footer__brand-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.footer__social {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--border-light);
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-right: 8px;
  transition: all var(--duration-fast) var(--ease-out);
}

.footer__social:hover { border-color: var(--brand-blue); color: var(--brand-blue); background: #EFF6FF; }

.footer__col-title { font-size: 0.95rem; font-weight: 600; margin-bottom: 20px; color: var(--text-primary); }

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

.footer__links a { font-size: 0.88rem; color: var(--text-muted); }
.footer__links a:hover { color: var(--brand-blue); }

.footer__contact-item {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

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

.footer__qrcode {
  width: 100px;
  height: 100px;
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.6;
}

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

/* 友情链接 */
.friend-links {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  padding: 16px 0;
  border-top: 1px solid var(--border-light);
}

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

/* Footer Bottom */
.footer__bottom {
  background: #fff;
  border-top: 1px solid var(--border-light);
  padding: 18px 0;
}

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

@media (max-width: 640px) { .footer__bottom-inner { flex-direction: column; text-align: center; } }

.footer__bottom a { color: var(--text-muted); }
.footer__bottom a:hover { color: var(--brand-blue); }

/* ============================================================
   Back Top (暖色圆形按钮 = 在线客服风格)
   ============================================================ */
.back-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--brand-orange);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  z-index: 50;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.3);
  transition: all var(--duration-normal) var(--ease-out);
}

.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { background: #D97706; transform: translateY(-2px); }

/* 在线客服按钮 */
.kefu-btn {
  position: fixed;
  bottom: 92px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--brand-blue);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  z-index: 50;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
  transition: all var(--duration-normal) var(--ease-out);
}

.kefu-btn:hover { transform: scale(1.08); }

/* ============================================================
   Mobile Footer Nav
   ============================================================ */
@media (max-width: 768px) {
  body { padding-bottom: 64px; }

  .mobile-footer-nav {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 49;
    background: #fff;
    border-top: 1px solid var(--border-light);
    padding: 6px 0;
    padding-bottom: max(6px, env(safe-area-inset-bottom));
  }

  .mobile-footer-nav a {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    padding: 6px;
    font-size: 0.6rem;
    color: var(--text-muted);
  }

  .mobile-footer-nav a i { font-size: 1rem; }
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
  .header__nav { display: none; }
  .header__actions { display: none; }
  .hamburger { display: flex; }
}

@media (max-width: 768px) {
  :root { --section-py: 64px; --header-h: 60px; }
  .card-grid { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   响应式 — 移动端重排版 (< 768px)
   ★ 卡片组由「纵向堆叠」改为「横向滑动 + 指示点」，
     配合区块间距收紧，避免 PC 版式直接压缩导致页面过长
   ============================================================ */
@media (max-width: 768px) {
  :root { --section-py: 34px; }

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

  /* ---------- 标题组 ---------- */
  .section-head { margin-bottom: 20px; }
  .section-head--row { align-items: center; }
  .section-title { font-size: 1.3rem; margin-bottom: 6px; }
  .section-subtitle { font-size: 0.85rem; line-height: 1.6; }
  .section-tag { font-size: 0.68rem; margin-bottom: 6px; }

  /* ---------- Hero ---------- */
  .hero { height: 52vh; min-height: 340px; max-height: 460px; }
  .hero__title { font-size: 1.6rem; margin-bottom: 10px; }
  .hero__subtitle { font-size: 0.88rem; margin-bottom: 20px; }
  .hero__actions { gap: 10px; }
  .hero__actions .btn { flex: 1 1 auto; text-align: center; }
  .hero-pagination { bottom: 16px; }

  /* ---------- 内页 Banner / 面包屑 ---------- */
  /* 高度压到 175px 后内容会顶到固定头部下面，用 padding-top 让出头部高度，
     标题仍然居中在剩余空间里 */
  .inner-banner { height: 175px !important; padding-top: var(--header-h); }
  .inner-banner__title { font-size: 1.35rem; }
  .inner-banner__subtitle { font-size: 0.85rem; }
  .breadcrumb { font-size: 0.75rem; padding: 9px 16px; }

  /* ---------- 横滑轨道通用规则 ---------- */
  .category-grid,
  .card-grid--scroll,
  .case-grid--scroll,
  .features {
    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 12px;
    scroll-padding-left: 16px;
  }

  .category-grid::-webkit-scrollbar,
  .card-grid--scroll::-webkit-scrollbar,
  .case-grid--scroll::-webkit-scrollbar,
  .features::-webkit-scrollbar { display: none; }

  .category-grid > *,
  .card-grid--scroll > *,
  .case-grid--scroll > *,
  .features > * {
    flex-grow: 0;
    flex-shrink: 0;
    scroll-snap-align: start;
  }

  .category-grid > * { flex-basis: 58%; }
  .card-grid--scroll > * { flex-basis: 72%; }
  .case-grid--scroll > * { flex-basis: 66%; }
  .features > * { flex-basis: 76%; }

  /* ---------- 色卡（首页 12 色块） ---------- */
  .color-grid { grid-template-columns: repeat(4, 1fr); gap: 8px; }
  .color-card { padding: 8px 4px; border-radius: var(--radius-md); }
  .color-card__code { font-size: 0.6rem; margin-bottom: 1px; }
  .color-card__name { font-size: 0.62rem; }

  /* ---------- 产品分类卡 ---------- */
  .category-card { padding: 20px 14px; }
  .category-card__icon { width: 44px; height: 44px; font-size: 1.15rem; margin-bottom: 10px; }
  .category-card__title { font-size: 0.95rem; margin-bottom: 4px; }
  .category-card__desc { font-size: 0.76rem; line-height: 1.5; }

  /* ---------- 产品卡 ---------- */
  .card__body { padding: 12px; }
  .card__tag { font-size: 0.62rem; padding: 2px 8px; margin-bottom: 6px; }
  .card__title { font-size: 0.9rem; margin-bottom: 4px; }
  .card__desc { font-size: 0.76rem; line-height: 1.5; margin-bottom: 8px; }
  .card__meta { gap: 5px; font-size: 0.68rem; }
  .card__meta span { padding: 2px 7px; }

  /* ---------- 解决方案区块 ---------- */
  .solution-block { padding: 22px 0; gap: 14px; }
  .solution-block:first-child { padding-top: 4px; }
  .solution-block__image { aspect-ratio: 16 / 9; }
  .solution-block__title { font-size: 1.15rem; margin-bottom: 8px; }
  .solution-block__desc { font-size: 0.85rem; line-height: 1.65; }

  /* ---------- 工程案例卡 ---------- */
  .case-card__info { padding: 14px 12px; }
  .case-card__title { font-size: 0.92rem; margin-bottom: 2px; }
  .case-card__tag { font-size: 0.68rem; }

  /* ---------- 环保特性卡 ---------- */
  .feature-card { padding: 20px 14px; }
  .feature-card__icon { width: 48px; height: 48px; font-size: 1.25rem; margin-bottom: 10px; }
  .feature-card__title { font-size: 0.98rem; margin-bottom: 6px; }
  .feature-card__desc { font-size: 0.8rem; line-height: 1.6; }

  /* ---------- 新闻 ---------- */
  .news-featured { margin-bottom: 14px !important; }
  .news-featured__image { aspect-ratio: 16 / 9; }
  .news-featured__body { padding: 14px; }
  .news-featured__title { font-size: 1rem; margin-bottom: 6px; }
  .news-featured__desc { font-size: 0.82rem; line-height: 1.6; margin-bottom: 8px; }
  .news-list-item { gap: 10px; padding: 10px 0; }
  .news-list-item__thumb { width: 84px; height: 62px; }
  .news-list-item__date { font-size: 0.68rem; margin-bottom: 2px; }
  .news-list-item__title { font-size: 0.85rem; }

  /* ---------- 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-medium);
    transition: all var(--duration-fast) var(--ease-out);
  }
  .hscroll-dots span.on { width: 16px; border-radius: 3px; background: var(--brand-blue); }

  /* ---------- CTA ---------- */
  .cta-bar { padding: 34px 16px; }
  .cta-bar__title { font-size: 1.3rem; margin-bottom: 8px; }
  .cta-bar__desc { font-size: 0.88rem; margin-bottom: 20px; }
  .cta-bar__actions { gap: 10px; }
  .cta-bar__actions .btn { flex: 1 1 auto; text-align: center; padding: 12px 18px !important; font-size: 0.9rem !important; }

  /* ---------- 列表页 ---------- */
  .filter-bar { gap: 6px; padding-bottom: 10px; }
  .filter-bar a { padding: 6px 13px; font-size: 0.78rem; }
  .card-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .case-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .pagination { margin-top: 24px; gap: 4px; }
  .pagination a, .pagination span { min-width: 34px; height: 34px; font-size: 0.78rem; }
  .empty-state { padding: 40px 16px; }

  /* ---------- 色卡中心 ---------- */
  .color-center-grid { grid-template-columns: repeat(3, 1fr); gap: 10px; }
  .color-swatch__chip { padding: 8px; }
  .color-swatch__info { padding: 7px 4px; }
  .color-swatch__code { font-size: 0.66rem; }
  .color-swatch__name { font-size: 0.62rem; }

  /* ---------- 详情页 ---------- */
  .detail-layout { gap: 20px; }
  .detail__title { font-size: 1.3rem; }
  .detail__subtitle { font-size: 0.84rem; }
  .specs-table { font-size: 0.8rem; }
  .specs-table td { padding: 8px 10px; }
  .detail__tabs { gap: 4px; overflow-x: auto; scrollbar-width: none; margin-bottom: 18px; }
  .detail__tabs::-webkit-scrollbar { display: none; }
  .detail__tabs a { padding: 8px 14px; font-size: 0.82rem; white-space: nowrap; flex-shrink: 0; }
  .detail__body { font-size: 0.88rem; line-height: 1.8; }
  .detail__body p { margin-bottom: 12px; }
  .detail__body h2, .detail__body h3 { margin-top: 20px; margin-bottom: 8px; }
  .detail__body h2 { font-size: 1.15rem; }
  .detail__body h3 { font-size: 1rem; }
  .detail__body table { font-size: 0.76rem; }
  .detail__body table th, .detail__body table td { padding: 7px 9px; }
  .detail__pager { margin-top: 24px; padding-top: 14px; font-size: 0.78rem; flex-direction: column; text-align: center; }
  .related-title { font-size: 1.05rem; margin: 26px 0 14px; }

  /* ---------- 联系 / 询价 ---------- */
  .contact-grid { gap: 24px; }
  .contact-info__item, .contact-info-card { padding: 12px; gap: 10px; }
  .contact-info__icon { width: 36px; height: 36px; font-size: 0.88rem; }

  /* ---------- 搜索页 ---------- */
  .search-result-item { flex-direction: column; }

  /* ---------- Footer：四列改两列 + 通栏 ---------- */
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px 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-bottom: 12px; }
  .footer__social { width: 32px; height: 32px; font-size: 0.82rem; margin-right: 6px; }
  .footer__col-title { font-size: 0.88rem; 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; }
  .footer__qr-text { font-size: 0.74rem; margin-top: 0; }
  .friend-links { gap: 9px; padding: 10px 0; }
  .friend-links a, .friend-links__label { font-size: 0.72rem; }
  .footer__bottom { padding: 12px 0; }
  .footer__bottom-inner { font-size: 0.7rem; padding: 0 16px; gap: 6px; }

  /* ---------- 浮动按钮 ---------- */
  .back-top { right: 12px; bottom: 78px; width: 42px; height: 42px; }
  .kefu-btn { right: 12px; bottom: 128px; width: 42px; height: 42px; font-size: 1.1rem; }
}

/* ============================================================
   Reduced Motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}