/* ============================================================
   安平钢格板 · 全局样式表 (style.css)
   规范：原生 CSS3，3 套色板，8px 间距基准，4 断点响应式
   依赖变量统一在 :root 定义，全站仅使用色板内颜色
   ============================================================ */

/* ============ 全局设计令牌（CSS 变量）============ */
:root {
  /* 品牌色（主色 + 辅助色） */
  --color-primary: #1A56DB;
  --color-primary-dark: #1646B3;
  --color-primary-light: #3B6FE0;
  --color-primary-soft: rgba(26, 86, 219, 0.10);
  --color-accent: #F59E0B;
  --color-success: #10B981;
  --color-danger: #EF4444;
  /* 中性色（背景/文本/边框 6 级） */
  --color-bg-page: #FFFFFF;
  --color-bg-section: #F9F9FB;
  --color-bg-card: #FFFFFF;
  --color-text-primary: #0A0A0B;
  --color-text-secondary: #52525B;
  --color-text-tertiary: #71717A;
  --color-text-white: #FFFFFF;
  --color-text-muted-dark: #9CA3AF;
  --color-border-subtle: #E4E4E7;
  --color-border-strong: #D4D4D8;
  /* 圆角（三档） */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-pill: 100px;
  /* 间距（8px 基准体系） */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-2xl: 64px;
  --spacing-3xl: 80px;
  /* 阴影（三档） */
  --shadow-card: 0 1px 2px rgba(15, 20, 25, 0.04);
  --shadow-elevated: 0 4px 12px rgba(15, 20, 25, 0.06);
  --shadow-hover: 0 8px 24px rgba(15, 20, 25, 0.10);
  /* 字体 */
  --font-stack: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  /* 过渡 */
  --transition: all 0.3s ease;
}

/* ============ 重置 ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-bg-page);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul { list-style: none; }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

/* ============ 通用容器 / 区块 ============ */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}
.section { padding: var(--spacing-3xl) 0; }
.section--gray { background: var(--color-bg-section); }
.section--dark { background: var(--color-primary-dark); color: var(--color-text-white); }

.section-head { text-align: center; max-width: 720px; margin: 0 auto var(--spacing-2xl); }
.section-tag {
  display: inline-block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
  letter-spacing: 0.05em;
}
.section-title {
  font-size: 38px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
}
.section-subtitle {
  font-size: 17px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ============ 按钮（3 类：主/次/文字）============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: 16px 32px;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  min-height: 48px;
  cursor: pointer;
  text-align: center;
}
.btn--primary { background: var(--color-primary); color: var(--color-text-white); }
.btn--primary:hover { background: var(--color-primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-elevated); }
.btn--secondary { background: var(--color-bg-card); color: var(--color-primary); border: 1px solid var(--color-border-strong); }
.btn--secondary:hover { border-color: var(--color-primary); background: var(--color-primary-soft); }
.btn--ghost { color: var(--color-primary); padding: 10px 20px; }
.btn--ghost:hover { background: var(--color-primary-soft); }
.btn--block { width: 100%; }

/* ============ 顶部导航 ============ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border-subtle);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo__icon {
  width: 36px; height: 36px;
  background: var(--color-primary);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-text-white); font-weight: 700; font-size: 20px;
}
.logo__text { font-size: 20px; font-weight: 700; color: var(--color-text-primary); }
.nav { display: flex; gap: var(--spacing-xl); }
.nav__link {
  font-size: 15px;
  color: var(--color-text-primary);
  padding: 8px 0;
  position: relative;
}
.nav__link:hover, .nav__link--active { color: var(--color-primary); }
.nav__link--active::after {
  content: ''; position: absolute; bottom: -4px; left: 0; right: 0;
  height: 2px; background: var(--color-primary); border-radius: 2px;
}
.header__actions { display: flex; align-items: center; gap: var(--spacing-md); }
.header__phone { font-size: 14px; font-weight: 600; color: var(--color-text-primary); }
.header__cta { padding: 10px 20px; font-size: 14px; min-height: 40px; }
.menu-toggle {
  display: none; width: 44px; height: 44px;
  flex-direction: column; justify-content: center; align-items: center; gap: 5px;
}
.menu-toggle span { width: 24px; height: 2px; background: var(--color-text-primary); transition: var(--transition); }
.menu-toggle--open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle--open span:nth-child(2) { opacity: 0; }
.menu-toggle--open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ 面包屑 ============ */
.breadcrumb {
  padding: var(--spacing-md) 0;
  font-size: 14px;
  color: var(--color-text-tertiary);
  background: var(--color-bg-section);
}
.breadcrumb__inner { max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-lg); }
.breadcrumb a { color: var(--color-text-secondary); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb__sep { margin: 0 8px; color: var(--color-text-muted-dark); }
.breadcrumb__current { color: var(--color-text-primary); font-weight: 500; }

/* ============ 子页面 Banner（page-hero）============ */
.page-hero {
  background: linear-gradient(135deg, #F0F4FA 0%, #E0EAF9 100%);
  padding: var(--spacing-2xl) 0;
}
.page-hero__inner { max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-lg); text-align: center; }
.page-hero__title { font-size: 44px; font-weight: 700; line-height: 1.2; color: var(--color-text-primary); margin-bottom: var(--spacing-sm); }
.page-hero__sub { font-size: 17px; color: var(--color-text-secondary); max-width: 680px; margin: 0 auto; }

/* ============ Hero 首屏 ============ */
.hero {
  background: linear-gradient(135deg, #F0F4FA 0%, #E0EAF9 100%);
  padding: var(--spacing-3xl) 0;
}
.hero__inner {
  display: grid;
  grid-template-columns: 1fr 560px;
  gap: 60px;
  align-items: center;
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}
.hero__badge {
  display: inline-flex; align-items: center;
  padding: 6px 14px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  border-radius: var(--radius-pill);
  font-size: 13px; font-weight: 500;
  margin-bottom: var(--spacing-lg);
}
.hero__title {
  font-size: 52px; font-weight: 700; line-height: 1.2;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
}
.hero__sub {
  font-size: 17px; line-height: 1.6;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
  max-width: 580px;
}
.hero__actions { display: flex; gap: var(--spacing-md); margin-bottom: var(--spacing-xl); flex-wrap: wrap; }
.hero__metrics { display: flex; gap: var(--spacing-xl); flex-wrap: wrap; }
.hero__metric-num { font-size: 32px; font-weight: 700; color: var(--color-primary); line-height: 1; }
.hero__metric-label { font-size: 13px; color: var(--color-text-secondary); margin-top: 4px; }
.hero-slider {
  position: relative;
  width: 100%;
  height: 440px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-border-subtle);
  box-shadow: var(--shadow-elevated);
}
.hero-slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity .8s ease;
}
.hero-slide.is-active { opacity: 1; }

.hero-dots {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 2;
}
.hero-dot {
  width: 10px; height: 10px;
  padding: 0;
  border: none;
  border-radius: 999px;
  background: rgba(255, 255, 255, .55);
  box-shadow: 0 1px 3px rgba(0, 0, 0, .4);
  cursor: pointer;
  transition: width .3s ease, background .3s ease;
}
.hero-dot.is-active { width: 26px; background: #fff; }

.hero-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  border: none;
  border-radius: 50%;
  background: rgba(0, 0, 0, .35);
  color: #fff;
  font-size: 18px;
  cursor: pointer;
  opacity: 0;
  transition: opacity .3s ease, background .3s ease;
  z-index: 2;
}
.hero-slider:hover .hero-arrow { opacity: 1; }
.hero-arrow:hover { background: rgba(0, 0, 0, .55); }
.hero-arrow--prev { left: 14px; }
.hero-arrow--next { right: 14px; }

@media (prefers-reduced-motion: reduce) {
  .hero-slide { transition: none; }
}

/* ============ 产品分类（场景）============ */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-md);
}
.product-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  display: flex; flex-direction: column;
}
.product-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-elevated);
  transform: translateY(-4px);
}
.product-card__img {
  width: 100%; height: 140px;
  object-fit: cover;
  background: var(--color-bg-section);
  border-bottom: 1px solid var(--color-border-subtle);
}
.product-card__body { padding: 16px; display: flex; flex-direction: column; gap: 8px; }
.product-card__name { font-size: 16px; font-weight: 600; color: var(--color-text-primary); }
.product-card__desc { font-size: 13px; color: var(--color-text-secondary); }
.more-cta {
  margin-top: var(--spacing-lg);
  padding: 14px 32px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  border-radius: var(--radius-sm);
  text-align: center;
  font-size: 16px; font-weight: 600;
  transition: var(--transition);
  display: inline-block;
}
.more-cta:hover { background: var(--color-primary); color: var(--color-text-white); }

/* 首页应用场景折叠网格与展开按钮 */
.product-grid--more { margin-top: var(--spacing-md); }
.product-grid--more[hidden] { display: none !important; }
.more-toggle { display: inline-block; padding: 10px 26px; background: var(--color-bg-card); color: var(--color-primary); border: 1px solid var(--color-border-strong); border-radius: var(--radius-pill); font-size: 14px; font-weight: 600; cursor: pointer; transition: var(--transition); }
.more-toggle:hover, .more-toggle.is-open { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* ============ 工艺分类 ============ */
.craft-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--spacing-sm);
}
.craft-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  display: flex; flex-direction: column;
}
.craft-card:hover { border-color: var(--color-primary); box-shadow: var(--shadow-elevated); transform: translateY(-4px); }
.craft-card__img {
  width: 100%; height: 120px;
  object-fit: cover;
  background: var(--color-bg-section);
}
.craft-card__body { padding: 16px; text-align: center; display: flex; flex-direction: column; gap: 6px; }
.craft-card__name { font-size: 16px; font-weight: 600; color: var(--color-text-primary); }
.craft-card__desc { font-size: 12px; color: var(--color-text-secondary); }

/* ============ 企业优势 ============ */
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--spacing-sm); }
.adv-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  transition: var(--transition);
}
.adv-card:hover { box-shadow: var(--shadow-elevated); transform: translateY(-4px); }
.adv-card__num {
  width: 52px; height: 52px;
  background: var(--color-primary-soft); color: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 20px;
  margin-bottom: var(--spacing-md);
}
.adv-card__title { font-size: 20px; font-weight: 700; color: var(--color-text-primary); margin-bottom: var(--spacing-sm); }
.adv-card__desc { font-size: 13px; color: var(--color-text-secondary); line-height: 1.6; }

/* ============ 案例 ============ */
.case-head { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: var(--spacing-2xl); }
.case-head .section-head { text-align: left; margin: 0; }
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-sm); }
.case-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}
.case-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.case-card__img { width: 100%; height: 220px; object-fit: cover; background: var(--color-border-subtle); }
.case-card__body { padding: 20px; display: flex; flex-direction: column; gap: var(--spacing-xs); }
.case-card__tag {
  display: inline-block; align-self: flex-start;
  padding: 4px 10px;
  background: var(--color-primary-soft); color: var(--color-primary);
  border-radius: 4px; font-size: 12px; font-weight: 500;
}
.case-card__name { font-size: 18px; font-weight: 600; color: var(--color-text-primary); }
.case-card__desc { font-size: 13px; color: var(--color-text-secondary); line-height: 1.5; }

/* ============ 关于企业 ============ */
.about__inner { display: grid; grid-template-columns: 520px 1fr; gap: 60px; align-items: center; }
.about__img { width: 100%; height: 420px; border-radius: var(--radius-lg); object-fit: cover; background: var(--color-border-subtle); box-shadow: var(--shadow-elevated); }
.about__text { display: flex; flex-direction: column; gap: var(--spacing-md); }
.about__desc { font-size: 15px; line-height: 1.7; color: var(--color-text-secondary); }
.about__stats { display: flex; gap: var(--spacing-xl); padding-top: var(--spacing-md); border-top: 1px solid var(--color-border-subtle); }
.about__stat-num { font-size: 28px; font-weight: 700; color: var(--color-primary); }
.about__stat-label { font-size: 13px; color: var(--color-text-secondary); margin-top: 6px; }

/* 公司内容页：数据块 */
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--spacing-md); }
.stat-box {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  text-align: center;
}
.stat-box__num { font-size: 36px; font-weight: 700; color: var(--color-primary); line-height: 1; }
.stat-box__label { font-size: 14px; color: var(--color-text-secondary); margin-top: var(--spacing-xs); }

/* 公司内容页：资质/时间线 */
.timeline { display: flex; flex-direction: column; gap: var(--spacing-md); max-width: 760px; margin: 0 auto; }
.timeline__item {
  display: grid; grid-template-columns: 120px 1fr; gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
}
.timeline__year { font-size: 20px; font-weight: 700; color: var(--color-primary); }
.timeline__text { font-size: 15px; color: var(--color-text-secondary); line-height: 1.6; }

/* ============ 联系咨询 ============ */
.contact__inner { display: grid; grid-template-columns: 1fr 600px; gap: 60px; align-items: center; }
.contact__info { display: flex; flex-direction: column; gap: var(--spacing-md); }
.contact__tag { font-size: 14px; color: var(--color-primary-light); font-weight: 500; }
.contact__title { font-size: 38px; font-weight: 700; color: var(--color-text-white); line-height: 1.2; }
.contact__desc { font-size: 15px; color: #B8C7E0; line-height: 1.6; }
.contact__list { display: flex; flex-direction: column; gap: var(--spacing-sm); margin-top: var(--spacing-sm); }
.contact__item { display: flex; align-items: center; gap: var(--spacing-xs); }
.contact__item-icon {
  width: 40px; height: 40px; flex-shrink: 0;
  background: var(--color-primary); border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-text-white); font-weight: 700; font-size: 16px;
}
.contact__item-text { font-size: 15px; color: var(--color-text-white); font-weight: 500; }
.contact__form {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: flex; flex-direction: column; gap: var(--spacing-md);
}
.contact__form-title { font-size: 22px; font-weight: 700; color: var(--color-text-primary); }
.form-field { display: flex; flex-direction: column; gap: 6px; }
.form-field__label { font-size: 13px; font-weight: 500; color: var(--color-text-secondary); }
.form-field__input, .form-field__textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  background: var(--color-bg-section);
  font-size: 14px; font-family: inherit;
  transition: var(--transition);
}
.form-field__input:focus, .form-field__textarea:focus {
  outline: none; border-color: var(--color-primary);
  background: var(--color-bg-card);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}
.form-field__textarea { min-height: 110px; resize: vertical; }
.form-field__error { font-size: 12px; color: var(--color-danger); display: none; }
.form-field--error .form-field__input, .form-field--error .form-field__textarea { border-color: var(--color-danger); }
.form-field--error .form-field__error { display: block; }
.form-submit { width: 100%; min-height: 52px; }
.form-feedback { padding: 12px; border-radius: var(--radius-sm); font-size: 14px; display: none; }
.form-feedback--success { background: rgba(16, 185, 129, 0.1); color: var(--color-success); display: block; }
.form-feedback--error { background: rgba(239, 68, 68, 0.1); color: var(--color-danger); display: block; }

/* 联系页：信息卡 + 地图占位 */
.contact-page__grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-xl); align-items: start; }

.info-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  display: flex; flex-direction: column; gap: var(--spacing-md);
}
.info-row { display: flex; align-items: flex-start; gap: var(--spacing-sm); }
.info-row__icon {
  width: 40px; height: 40px; flex-shrink: 0;
  background: var(--color-primary-soft); color: var(--color-primary);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 16px;
}
.info-row__label { font-size: 13px; color: var(--color-text-tertiary); }
.info-row__value { font-size: 16px; color: var(--color-text-primary); font-weight: 600; line-height: 1.5; }
.map-placeholder {
  width: 100%; height: 360px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #EEF2F9 0%, #E0EAF9 100%);
  border: 1px dashed var(--color-border-strong);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  color: var(--color-text-tertiary); text-align: center; gap: var(--spacing-xs);
}
.map-placeholder__icon { font-size: 40px; }
.map-placeholder__text { font-size: 15px; }

/* 联系信息可点击行：拨号 / 发邮件 / 加微信 */
.info-row--link { cursor: pointer; border-radius: var(--radius-sm); transition: background .15s ease; }
.info-row--link:hover { background: var(--color-primary-soft); }
a.info-row__value { color: var(--color-primary); text-decoration: none; font-weight: 600; }
a.info-row__value:hover { text-decoration: underline; }
a.header__phone,
a.footer__phone { color: inherit; text-decoration: none; }
a.header__phone:hover { color: var(--color-primary); }
a.footer__phone:hover { color: var(--color-primary); }
/* 底部微信扫码咨询 */
.footer__wechat {
  display: inline-flex; align-items: center; gap: 12px;
  margin-top: 4px; padding: 8px 12px; width: fit-content;
  background: rgba(7, 193, 96, 0.12); border: 1px solid rgba(7, 193, 96, 0.35);
  border-radius: var(--radius-sm); text-decoration: none; cursor: pointer;
  transition: background .15s ease, border-color .15s ease;
}
.footer__wechat:hover { background: rgba(7, 193, 96, 0.2); border-color: #07C160; }
.footer__wechat img { width: 48px; height: 48px; border-radius: 6px; border: 2px solid #fff; background: #fff; flex-shrink: 0; }
.footer__wechat-text { display: flex; flex-direction: column; line-height: 1.25; }
.footer__wechat-text strong { font-size: 14px; color: var(--color-text-white); font-weight: 600; }
.footer__wechat-text em { font-size: 12px; font-style: normal; color: #4ADE80; }
.contact__item--btn { cursor: pointer; border-radius: var(--radius-sm); transition: background .15s ease; }
.contact__item--btn:hover { background: rgba(255,255,255,.08); }
a.contact__item-text { color: inherit; text-decoration: none; }
a.contact__item-text:hover { text-decoration: underline; }

/* 微信二维码弹层（点击添加微信） */
.qr-modal {
  position: fixed; inset: 0; z-index: 1000;
  display: none; align-items: center; justify-content: center;
  background: rgba(15,23,42,.6); padding: var(--spacing-md);
  opacity: 0; transition: opacity .2s ease;
}
.qr-modal--open { display: flex; opacity: 1; }
.qr-modal__panel {
  background: #fff; border-radius: var(--radius-lg); padding: var(--spacing-xl);
  max-width: 340px; width: 100%; text-align: center; position: relative;
  box-shadow: 0 20px 60px rgba(0,0,0,.25);
  transform: translateY(12px) scale(.98); transition: transform .2s ease;
}
.qr-modal--open .qr-modal__panel { transform: translateY(0) scale(1); }
.qr-modal__title { font-size: 18px; font-weight: 700; color: var(--color-text-primary); margin-bottom: 4px; }
.qr-modal__sub { font-size: 13px; color: var(--color-text-tertiary); margin-bottom: var(--spacing-md); }
.qr-modal__img { width: 220px; height: 220px; max-width: 70vw; object-fit: contain; border-radius: var(--radius-sm); border: 1px solid var(--color-border-subtle); }
.qr-modal__hint { font-size: 13px; color: var(--color-text-secondary); margin-top: var(--spacing-md); }
.qr-modal__close {
  position: absolute; top: 12px; right: 12px; width: 36px; height: 36px;
  border: none; border-radius: 50%; background: var(--color-bg-section);
  color: var(--color-text-secondary); font-size: 20px; line-height: 1; cursor: pointer; transition: var(--transition);
}
.qr-modal__close:hover { background: var(--color-border-subtle); color: var(--color-text-primary); }
@media (prefers-reduced-motion: reduce) {
  .qr-modal, .qr-modal__panel { transition: none; transform: none; }
}

/* 底部微信二维码：点击放大（非全屏弹层，无遮罩） */
.qr-popover {
  position: fixed; left: 16px; bottom: 16px; z-index: 1001;
  display: none; flex-direction: column; align-items: center;
  width: 220px; padding: 18px 18px 16px;
  background: #fff; border-radius: var(--radius-lg);
  box-shadow: 0 16px 44px rgba(0,0,0,.22);
  text-align: center;
  opacity: 0; transform: translateY(12px) scale(.97);
  transition: opacity .18s ease, transform .18s ease;
}
.qr-popover--open { display: flex; opacity: 1; transform: translateY(0) scale(1); }
.qr-popover__title { font-size: 15px; font-weight: 700; color: var(--color-text-primary); }
.qr-popover__img { width: 160px; height: 160px; object-fit: contain; border-radius: var(--radius-sm); border: 1px solid var(--color-border-subtle); margin: 10px 0 8px; }
.qr-popover__hint { font-size: 12px; color: var(--color-text-secondary); }
.qr-popover__close {
  position: absolute; top: 8px; right: 8px; width: 30px; height: 30px;
  border: none; border-radius: 50%; background: var(--color-bg-section);
  color: var(--color-text-secondary); font-size: 18px; line-height: 1; cursor: pointer; transition: var(--transition);
}
.qr-popover__close:hover { background: var(--color-border-subtle); color: var(--color-text-primary); }
@media (max-width: 480px) {
  .qr-popover { left: 12px; right: 12px; bottom: 12px; width: auto; }
}
@media (prefers-reduced-motion: reduce) {
  .qr-popover { transition: none; transform: none; }
}

/* ============ 产品列表页：筛选标签 ============ */
.filter-bar {
  display: flex; flex-wrap: wrap; gap: var(--spacing-xs);
  justify-content: center;
  margin-bottom: var(--spacing-2xl);
}
.filter-tag {
  padding: 8px 18px;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-pill);
  font-size: 14px; font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-bg-card);
  transition: var(--transition);
  cursor: pointer;
}
.filter-tag:hover, .filter-tag--active {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

/* ============ 产品详情页 ============ */
.detail-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: start;
}
.detail-gallery {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border-subtle);
}
.detail-gallery__main {
  width: 100%; height: 420px; object-fit: cover; background: var(--color-bg-section);
}
.detail-content { display: flex; flex-direction: column; gap: var(--spacing-md); }
.detail-content__name { font-size: 34px; font-weight: 700; line-height: 1.25; }
.detail-content__lead { font-size: 16px; color: var(--color-text-secondary); line-height: 1.7; }
.detail-tags { display: flex; flex-wrap: wrap; gap: var(--spacing-xs); }
.detail-tags .tag {
  padding: 5px 14px;
  background: var(--color-primary-soft); color: var(--color-primary);
  border-radius: var(--radius-pill); font-size: 13px; font-weight: 500;
}
.detail-meta { display: flex; gap: var(--spacing-lg); flex-wrap: wrap; padding: var(--spacing-md) 0; border-top: 1px solid var(--color-border-subtle); border-bottom: 1px solid var(--color-border-subtle); }
.detail-meta__item { display: flex; flex-direction: column; gap: 2px; }
.detail-meta__label { font-size: 12px; color: var(--color-text-tertiary); }
.detail-meta__value { font-size: 15px; font-weight: 600; color: var(--color-text-primary); }

/* 规格参数表 */
.spec-table { width: 100%; border-collapse: collapse; margin-top: var(--spacing-md); }
.spec-table caption { text-align: left; font-size: 20px; font-weight: 700; color: var(--color-text-primary); margin-bottom: var(--spacing-sm); }
.spec-table th, .spec-table td {
  padding: 14px 16px;
  border: 1px solid var(--color-border-subtle);
  font-size: 14px;
  text-align: left;
}
.spec-table th { background: var(--color-bg-section); color: var(--color-text-secondary); font-weight: 600; width: 32%; }
.spec-table td { color: var(--color-text-primary); }

/* 详情页正文段落 */
.prose h2 { font-size: 26px; font-weight: 700; margin: var(--spacing-lg) 0 var(--spacing-sm); color: var(--color-text-primary); }
.prose h3 { font-size: 19px; font-weight: 600; margin: var(--spacing-md) 0 var(--spacing-xs); color: var(--color-text-primary); }
.prose p { font-size: 15px; line-height: 1.8; color: var(--color-text-secondary); margin-bottom: var(--spacing-sm); }
.prose ul.list { list-style: disc; padding-left: 24px; margin-bottom: var(--spacing-sm); }
.prose ul.list li { font-size: 15px; line-height: 1.8; color: var(--color-text-secondary); margin-bottom: 6px; }

/* 相关产品推荐 */
.related-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--spacing-md); }

/* ============ 行业信息列表页 ============ */
.article-list { display: flex; flex-direction: column; gap: var(--spacing-md); }
.article-item {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  transition: var(--transition);
}
.article-item:hover { border-color: var(--color-primary); box-shadow: var(--shadow-elevated); }
.article-item__date {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  background: var(--color-bg-section); border-radius: var(--radius-sm);
  color: var(--color-text-tertiary); padding: 12px;
}
.article-item__day { font-size: 32px; font-weight: 700; color: var(--color-primary); line-height: 1; }
.article-item__ym { font-size: 13px; margin-top: 4px; }
.article-item__body { display: flex; flex-direction: column; gap: 6px; }
.article-item__cat { font-size: 12px; color: var(--color-primary); font-weight: 500; }
.article-item__title { font-size: 18px; font-weight: 600; color: var(--color-text-primary); }
.article-item__excerpt { font-size: 14px; color: var(--color-text-secondary); line-height: 1.6; }

/* 分页 */
.pagination { display: flex; justify-content: center; gap: var(--spacing-xs); margin-top: var(--spacing-xl); }
.pagination a, .pagination span {
  min-width: 40px; height: 40px; padding: 0 12px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--color-border-subtle); border-radius: var(--radius-sm);
  font-size: 14px; color: var(--color-text-secondary); transition: var(--transition);
}
.pagination a:hover, .pagination .current { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* ============ 页脚 ============ */
.footer { background: var(--color-text-primary); color: var(--color-text-muted-dark); padding: 60px 0 32px; }
.footer__inner { max-width: 1320px; margin: 0 auto; padding: 0 var(--spacing-lg); }
.footer__top { display: grid; grid-template-columns: 340px repeat(3, 1fr); gap: 60px; padding-bottom: 40px; }
.footer__brand { display: flex; flex-direction: column; gap: var(--spacing-sm); }
.footer__logo { display: flex; align-items: center; gap: 10px; }
.footer__logo-icon { width: 36px; height: 36px; background: var(--color-primary); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; color: var(--color-text-white); font-weight: 700; font-size: 20px; }
.footer__logo-text { font-size: 20px; font-weight: 700; color: var(--color-text-white); }
.footer__desc { font-size: 13px; line-height: 1.7; }
.footer__phone { font-size: 22px; font-weight: 700; color: var(--color-text-white); }
.footer__col-title { font-size: 15px; font-weight: 600; color: var(--color-text-white); margin-bottom: 14px; }
.footer__col-list { display: flex; flex-direction: column; gap: 10px; }
.footer__col-link { font-size: 13px; transition: var(--transition); }
.footer__col-link:hover { color: var(--color-text-white); }
.footer__bottom {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 20px; border-top: 1px solid #52525B;
  font-size: 12px; flex-wrap: wrap; gap: var(--spacing-xs);
}
.footer__bottom a { color: var(--color-text-muted-dark); }
.footer__bottom a:hover { color: var(--color-text-white); }

/* ============ 返回顶部 ============ */
.back-top {
  position: fixed; right: 24px; bottom: 24px; z-index: 90;
  width: 44px; height: 44px; border-radius: var(--radius-pill);
  background: var(--color-primary); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; box-shadow: var(--shadow-elevated);
  opacity: 0; visibility: hidden; transition: var(--transition);
}
.back-top--show { opacity: 1; visibility: visible; }

/* 移动端底部固定导航（仅窄屏显示，由 JS 注入） */
.mobile-tabbar { display: none; }

/* ============ 响应式（4 断点）============ */
@media (max-width: 1024px) {
  .hero__inner { grid-template-columns: 1fr; }
  .hero-slider { height: 300px; }
  .product-grid { grid-template-columns: repeat(3, 1fr); }
  .craft-grid { grid-template-columns: repeat(3, 1fr); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .about__inner { grid-template-columns: 1fr; }
  .about__img { height: 360px; max-width: 520px; }
  .contact__inner { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .detail-layout { grid-template-columns: 1fr; }
  .contact-page__grid { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: repeat(3, 1fr); }
  .footer__top { grid-template-columns: 1fr 1fr; gap: var(--spacing-lg); }
}
@media (max-width: 768px) {
  .nav, .header__phone { display: none; }
  .menu-toggle { display: flex; }
  .nav--open {
    display: flex; flex-direction: column;
    position: absolute; top: 80px; left: 0; right: 0;
    background: var(--color-bg-card);
    padding: var(--spacing-md);
    gap: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border-subtle);
    box-shadow: var(--shadow-elevated);
  }
  .section { padding: var(--spacing-2xl) 0; }
  .section-title { font-size: 28px; }
  .page-hero__title { font-size: 30px; }
  .hero { padding: var(--spacing-2xl) 0; }
  .hero__title { font-size: 32px; }
  .hero__metrics { gap: var(--spacing-md); }
  .hero__metric-num { font-size: 24px; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .craft-grid { grid-template-columns: repeat(2, 1fr); }
  .adv-grid { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: 1fr; }
  .case-head { flex-direction: column; align-items: flex-start; gap: var(--spacing-md); }
  .about__stats { flex-wrap: wrap; gap: var(--spacing-md); }
  .contact__form { padding: var(--spacing-md); }
  .footer__top { grid-template-columns: 1fr 1fr; gap: var(--spacing-md) var(--spacing-xl); }
  .footer__brand { grid-column: 1 / -1; }
  .footer { padding: 40px 0 24px; }
  .footer__col-title { margin-bottom: 10px; }
  .footer__col-list { gap: 8px; }
  .footer__bottom { flex-direction: row; justify-content: center; flex-wrap: wrap; gap: 4px 14px; text-align: center; }
  .btn { width: 100%; }
  .hero__actions { flex-direction: column; }
  .article-item { grid-template-columns: 1fr; }
  .article-item__date { flex-direction: row; gap: 8px; padding: 8px 16px; }
  .timeline__item { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }

  /* 移动端底部固定导航 */
  body { padding-bottom: 64px; }
  .back-top { bottom: 76px; }
  .mobile-tabbar {
    display: flex;
    position: fixed; left: 0; right: 0; bottom: 0; z-index: 1000;
    background: var(--color-bg-card, #fff);
    border-top: 1px solid var(--color-border-subtle, #E4E4E7);
    box-shadow: 0 -2px 12px rgba(0,0,0,.06);
    padding-bottom: env(safe-area-inset-bottom, 0);
  }
  .mobile-tabbar__item {
    flex: 1;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 2px; padding: 7px 0 6px;
    font-size: 12px; line-height: 1; color: var(--color-text-secondary, #52525B);
    text-decoration: none; -webkit-tap-highlight-color: transparent;
  }
  .mobile-tabbar__item svg { width: 22px; height: 22px; }
  .mobile-tabbar__item--active { color: var(--color-primary); }
  .mobile-tabbar__item--phone { color: var(--color-primary); font-weight: 600; }
}
@media (min-width: 1440px) {
  .container, .header__inner, .hero__inner, .footer__inner { max-width: 1320px; }
}

/* ===== 详情页扩展（图集/FAQ/缩略图） ===== */
.detail-gallery__thumbs { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.detail-gallery__thumb { width: 84px; height: 64px; object-fit: cover; border: 2px solid var(--color-border-subtle, #E4E4E7); border-radius: 6px; cursor: pointer; transition: border-color .15s; }
.detail-gallery__thumb:hover { border-color: var(--color-primary, #1A56DB); }
.detail-gallery-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; margin-top: var(--spacing-lg, 20px); }
.detail-fig { margin: 0; }
.detail-fig img { width: 100%; height: 200px; object-fit: cover; border-radius: 8px; border: 1px solid var(--color-border-subtle, #E4E4E7); }
.faq-list { margin-top: var(--spacing-md, 16px); }
.faq-item { padding: 16px 0; border-bottom: 1px solid var(--color-border-subtle, #E4E4E7); }
.faq-item:last-child { border-bottom: none; }
.faq-item h3 { font-size: 16px; color: var(--color-primary, #1A56DB); margin: 0 0 8px; }
.faq-item p { margin: 0; color: var(--color-text-secondary, #52525B); line-height: 1.7; }
@media (max-width: 768px) {
  .detail-gallery-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .detail-fig img { height: 140px; }
}

/* ===== 详情页（富内容版 / 高强度压焊钢格板）===== */
.rd-hero { background: linear-gradient(135deg, #F0F4FA 0%, #E0EAF9 100%); padding: var(--spacing-2xl) 0; }
.rd-hero__inner { display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; align-items: center; max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-lg); }
.rd-hero__eyebrow { display: inline-block; font-size: 14px; font-weight: 600; color: var(--color-primary); background: var(--color-primary-soft); padding: 6px 14px; border-radius: var(--radius-pill); margin-bottom: var(--spacing-md); }
.rd-hero__title { font-size: 44px; font-weight: 700; line-height: 1.2; color: var(--color-text-primary); margin-bottom: var(--spacing-sm); }
.rd-hero__sub { font-size: 17px; color: var(--color-text-secondary); line-height: 1.7; margin-bottom: var(--spacing-lg); }
.rd-hero__tags { display: flex; flex-wrap: wrap; gap: var(--spacing-xs); margin-bottom: var(--spacing-lg); }
.rd-hero__tags .tag { padding: 5px 14px; background: #fff; color: var(--color-primary); border: 1px solid var(--color-border-strong); border-radius: var(--radius-pill); font-size: 13px; font-weight: 500; }
.rd-hero__media { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-elevated); border: 1px solid var(--color-border-subtle); }
.rd-hero__media img { width: 100%; height: 420px; object-fit: cover; }

.rd-adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-md); }
.rd-adv-card { background: var(--color-bg-card); border: 1px solid var(--color-border-subtle); border-radius: var(--radius-md); padding: var(--spacing-lg); transition: var(--transition); }
.rd-adv-card:hover { box-shadow: var(--shadow-elevated); transform: translateY(-4px); border-color: var(--color-primary); }
.rd-adv-card__num { font-size: 14px; font-weight: 700; color: var(--color-primary); background: var(--color-primary-soft); width: fit-content; padding: 4px 12px; border-radius: var(--radius-pill); margin-bottom: var(--spacing-sm); }
.rd-adv-card__title { font-size: 18px; font-weight: 700; color: var(--color-text-primary); margin-bottom: var(--spacing-xs); }
.rd-adv-card__desc { font-size: 14px; color: var(--color-text-secondary); line-height: 1.7; }

.rd-figure { margin: 0; }
.rd-figure img { width: 100%; max-height: 480px; object-fit: cover; border-radius: var(--radius-lg); border: 1px solid var(--color-border-subtle); box-shadow: var(--shadow-elevated); }
.rd-figure figcaption { font-size: 14px; color: var(--color-text-tertiary); margin-top: var(--spacing-sm); text-align: center; }

.rd-spec-wrap { overflow-x: auto; margin-top: var(--spacing-md); }
.rd-spec-table { width: 100%; border-collapse: collapse; min-width: 720px; }
.rd-spec-table caption { text-align: left; font-size: 20px; font-weight: 700; color: var(--color-text-primary); margin-bottom: var(--spacing-sm); }
.rd-spec-table th, .rd-spec-table td { padding: 13px 14px; border: 1px solid var(--color-border-subtle); font-size: 14px; text-align: left; white-space: nowrap; }
.rd-spec-table thead th { background: var(--color-primary); color: #fff; font-weight: 600; }
.rd-spec-table tbody tr:nth-child(even) { background: var(--color-bg-section); }
.rd-spec-note { font-size: 13px; color: var(--color-text-tertiary); margin-top: var(--spacing-sm); }

.rd-scenario-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-md); }
.rd-scenario { background: var(--color-bg-card); border: 1px solid var(--color-border-subtle); border-radius: var(--radius-md); padding: var(--spacing-lg); transition: var(--transition); }
.rd-scenario:hover { box-shadow: var(--shadow-elevated); transform: translateY(-4px); border-color: var(--color-primary); }
.rd-scenario__name { font-size: 17px; font-weight: 600; color: var(--color-text-primary); margin-bottom: 6px; }
.rd-scenario__desc { font-size: 14px; color: var(--color-text-secondary); line-height: 1.6; }

.rd-flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--spacing-sm); }
.rd-flow__step { background: var(--color-bg-card); border: 1px solid var(--color-border-subtle); border-radius: var(--radius-md); padding: var(--spacing-md); text-align: center; }
.rd-flow__num { width: 40px; height: 40px; margin: 0 auto var(--spacing-sm); border-radius: 50%; background: var(--color-primary); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 15px; }
.rd-flow__title { font-size: 16px; font-weight: 600; color: var(--color-text-primary); margin-bottom: 4px; }
.rd-flow__desc { font-size: 13px; color: var(--color-text-secondary); line-height: 1.6; }

.rd-quality { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--spacing-md); }
.rd-quality__item { background: var(--color-bg-card); border: 1px solid var(--color-border-subtle); border-radius: var(--radius-md); padding: var(--spacing-lg); }
.rd-quality__label { font-size: 13px; color: var(--color-primary); font-weight: 600; margin-bottom: 6px; }
.rd-quality__value { font-size: 15px; color: var(--color-text-primary); line-height: 1.6; }

@media (max-width: 1024px) {
  .rd-hero__inner { grid-template-columns: 1fr; }
  .rd-hero__media img { height: 320px; }
  .rd-adv-grid { grid-template-columns: repeat(2, 1fr); }
  .rd-scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .rd-flow { grid-template-columns: repeat(3, 1fr); }
  .rd-quality { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .rd-hero__title { font-size: 30px; }
  .rd-adv-grid { grid-template-columns: 1fr; }
  .rd-scenario-grid { grid-template-columns: 1fr; }
  .rd-flow { grid-template-columns: 1fr; }
  .rd-quality { grid-template-columns: 1fr; }
}

/* ===== 技术支持文章页 Hero 头部 ===== */
.art-hero {
  background:
    radial-gradient(1100px 420px at 88% -12%, rgba(26, 86, 219, 0.10), transparent 62%),
    linear-gradient(135deg, #F1F5FB 0%, #E1EAF9 100%);
  border-bottom: 1px solid var(--color-border-subtle);
  padding: var(--spacing-2xl) 0 var(--spacing-xl);
}
.art-hero__inner { display: grid; grid-template-columns: 1.12fr 0.88fr; gap: 56px; align-items: center; max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-lg); }
.art-hero__crumbs { font-size: 13px; color: var(--color-text-tertiary); margin-bottom: var(--spacing-md); }
.art-hero__crumbs a { color: var(--color-text-secondary); text-decoration: none; transition: var(--transition); }
.art-hero__crumbs a:hover { color: var(--color-primary); }
.art-hero__crumbs .sep { margin: 0 8px; color: var(--color-text-tertiary); }
.art-hero__crumbs .cur { color: var(--color-primary); font-weight: 500; }
.art-hero__cat { display: inline-block; font-size: 13px; font-weight: 600; color: var(--color-primary); background: var(--color-primary-soft); border: 1px solid rgba(26, 86, 219, 0.18); padding: 5px 14px; border-radius: var(--radius-pill); margin-bottom: var(--spacing-sm); }
.art-hero__title { font-size: 40px; font-weight: 700; line-height: 1.25; color: var(--color-text-primary); margin-bottom: var(--spacing-sm); }
.art-hero__sub { font-size: 16px; color: var(--color-text-secondary); line-height: 1.8; margin-bottom: var(--spacing-md); max-width: 640px; }
.art-hero__meta { display: flex; flex-wrap: wrap; gap: 8px 22px; font-size: 13px; color: var(--color-text-tertiary); margin-bottom: var(--spacing-md); }
.art-hero__meta b { color: var(--color-text-primary); font-weight: 600; }
.art-hero__tags { display: flex; flex-wrap: wrap; gap: var(--spacing-xs); margin-bottom: var(--spacing-lg); }
.art-hero__tags .tag { padding: 5px 14px; background: #fff; color: var(--color-primary); border: 1px solid var(--color-border-strong); border-radius: var(--radius-pill); font-size: 13px; font-weight: 500; }
.art-hero__actions { display: flex; flex-wrap: wrap; gap: var(--spacing-sm); }
.art-hero__media { position: relative; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-elevated); border: 1px solid var(--color-border-subtle); }
.art-hero__media img { width: 100%; height: 420px; object-fit: cover; display: block; }
.art-hero__media figcaption { position: absolute; left: 0; right: 0; bottom: 0; padding: 44px var(--spacing-md) var(--spacing-sm); font-size: 13px; color: #fff; background: linear-gradient(transparent, rgba(17, 32, 66, 0.74)); }
@media (max-width: 1024px) {
  .art-hero__inner { grid-template-columns: 1fr; gap: 40px; }
  .art-hero__media img { height: 320px; }
}
@media (max-width: 768px) {
  .art-hero { padding: var(--spacing-xl) 0; }
  .art-hero__title { font-size: 28px; }
  .art-hero__media img { height: 240px; }
}

/* ===== 工程案例：列表卡片 / 统计条 / 详情页 ===== */
.case-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--spacing-md); margin-bottom: var(--spacing-lg); }
.case-stats__item { background: var(--color-bg-card); border: 1px solid var(--color-border-subtle); border-radius: var(--radius-md); padding: var(--spacing-lg); text-align: center; }
.case-stats__item b { display: block; font-size: 26px; font-weight: 700; color: var(--color-primary); line-height: 1.2; }
.case-stats__item span { font-size: 13px; color: var(--color-text-secondary); }

.case-card { display: block; text-decoration: none; background: var(--color-bg-card); border: 1px solid var(--color-border-subtle); border-radius: var(--radius-md); overflow: hidden; transition: var(--transition); }
.case-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); border-color: var(--color-primary); }
.case-card__media { position: relative; }
.case-card__year { position: absolute; top: 12px; left: 12px; background: var(--color-primary); color: #fff; font-size: 12px; font-weight: 600; padding: 4px 10px; border-radius: 4px; }
.case-card__region { position: absolute; top: 12px; right: 12px; background: rgba(17, 32, 66, 0.72); color: #fff; font-size: 12px; padding: 4px 10px; border-radius: 4px; }

.case-detail__grid { display: grid; grid-template-columns: 1fr 340px; gap: var(--spacing-xl); align-items: start; }
.case-side { position: sticky; top: 24px; display: flex; flex-direction: column; gap: var(--spacing-md); }
.case-panel { background: var(--color-bg-card); border: 1px solid var(--color-border-subtle); border-radius: var(--radius-md); padding: var(--spacing-lg); }
.case-panel__title { display: inline-block; font-size: 16px; font-weight: 600; color: var(--color-text-primary); margin: 0 0 var(--spacing-sm); padding-bottom: 8px; border-bottom: 2px solid var(--color-primary); }
.case-kv { display: flex; flex-direction: column; gap: 10px; }
.case-kv__row { display: flex; justify-content: space-between; gap: 16px; font-size: 14px; line-height: 1.5; }
.case-kv__k { color: var(--color-text-secondary); flex-shrink: 0; }
.case-kv__v { color: var(--color-text-primary); font-weight: 500; text-align: right; }
.case-list-mini { display: flex; flex-direction: column; }
.case-list-mini a { display: flex; align-items: center; gap: 10px; padding: 8px 0; border-bottom: 1px dashed var(--color-border-subtle); text-decoration: none; }
.case-list-mini a:last-child { border-bottom: none; }
.case-list-mini img { width: 56px; height: 40px; object-fit: cover; border-radius: 4px; flex-shrink: 0; }
.case-list-mini span { font-size: 13px; color: var(--color-text-primary); line-height: 1.4; }
.case-panel--cta { background: linear-gradient(135deg, #F0F4FA 0%, #E1EAF9 100%); border-color: var(--color-border-strong); }
@media (max-width: 1024px) {
  .case-detail__grid { grid-template-columns: 1fr; }
  .case-side { position: static; }
  .case-stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .case-stats { grid-template-columns: 1fr 1fr; gap: var(--spacing-xs); }
  .case-stats__item b { font-size: 20px; }
}

/* ===== 选型工具入口（规格型号大全 / 价格指南） ===== */
.seo-tools { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-md); max-width: 960px; margin: 0 auto; }
.seo-tools__item { display: flex; flex-direction: column; gap: 6px; background: var(--color-bg-card); border: 1px solid var(--color-border-subtle); border-radius: var(--radius-md); padding: var(--spacing-lg) var(--spacing-xl); text-decoration: none; transition: var(--transition); }
.seo-tools__item:hover { box-shadow: var(--shadow-elevated); transform: translateY(-3px); border-color: var(--color-primary); }
.seo-tools__item strong { font-size: 18px; font-weight: 700; color: var(--color-primary); }
.seo-tools__item span { font-size: 13px; color: var(--color-text-secondary); }
.seo-tools--dark .seo-tools__item { background: rgba(255, 255, 255, 0.06); border-color: rgba(255, 255, 255, 0.14); }
.seo-tools--dark .seo-tools__item strong { color: #8FB3F5; }
.seo-tools--dark .seo-tools__item span { color: #CBD5E1; }
.seo-tools--dark .seo-tools__item:hover { border-color: #8FB3F5; }
@media (max-width: 768px) {
  .seo-tools { grid-template-columns: 1fr; }
}

/* ===== 关于我们：主营产品 / 执行标准 / 应用领域 ===== */
.about__prod-grid { display: flex; flex-wrap: wrap; gap: var(--spacing-sm); justify-content: center; max-width: 900px; margin: 0 auto; }
.about__prod-chip { background: var(--color-bg-card); border: 1px solid var(--color-border-strong); color: var(--color-text-primary); font-size: 15px; font-weight: 500; padding: 10px 22px; border-radius: var(--radius-pill); transition: var(--transition); }
.about__prod-chip:hover { border-color: var(--color-primary); color: var(--color-primary); background: var(--color-primary-soft); }
.std-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-md); max-width: 900px; margin: 0 auto; }
.std-box { background: var(--color-bg-card); border: 1px solid var(--color-border-subtle); border-radius: var(--radius-md); padding: var(--spacing-lg); text-align: center; transition: var(--transition); }
.std-box:hover { box-shadow: var(--shadow-elevated); border-color: var(--color-primary); transform: translateY(-3px); }
.std-box__code { font-size: 20px; font-weight: 700; color: var(--color-primary); margin-bottom: 6px; }
.std-box__label { font-size: 13px; color: var(--color-text-secondary); }
.about__field-grid { display: flex; flex-wrap: wrap; gap: var(--spacing-sm); justify-content: center; max-width: 800px; margin: 0 auto; }
.about__field { background: var(--color-primary-soft); color: var(--color-primary); font-size: 15px; font-weight: 600; padding: 10px 24px; border-radius: var(--radius-pill); }
@media (max-width: 768px) {
  .std-grid { grid-template-columns: repeat(2, 1fr); }
}