/* ============================================================
   实邦泵业 · 全局基础样式
   工业风 · 高级深蓝 + 薄荷青 · 干净通透
   ============================================================ */

/* ---------- CSS 变量：全站色彩与动效规范 ---------- */
:root {
  /* 主色调 */
  --color-deep-blue: #1e3348;          /* 高级深蓝 */
  --color-deep-blue-hover: #162a3d;    /* 深蓝加深（当前页边框） */
  --color-deep-blue-muted: #2a4158;    /* 低饱和深蓝（未选中按钮填充） */

  --color-light-green: #4ecdc4;          /* 明亮薄荷青 */
  --color-light-green-muted: #36a8a0;  /* 低饱和薄荷青（选中按钮 / 高亮文本） */
  --color-light-green-border: #5dd4cc; /* 交互边框薄荷青 */
  --color-light-green-shadow: rgba(78, 205, 196, 0.22);
  --color-light-green-scrollbar: rgba(78, 205, 196, 0.48);

  /* 黑蓝色：远看近黑，细看带蓝调 */
  --color-title: #1a2433;

  /* 背景层次：纯白基调 · 极淡浅绿质感 */
  --color-bg-page: #ffffff;
  --color-bg-page-alt: #f9fcfb;
  --color-bg-banner: #ffffff;
  --color-bg-banner-glass: rgba(255, 255, 255, 0.82);
  --section-grad-lr: linear-gradient(90deg, rgba(78, 205, 196, 0.034) 0%, transparent 50%, rgba(78, 205, 196, 0.016) 100%);
  --section-grad-rl: linear-gradient(270deg, rgba(78, 205, 196, 0.034) 0%, transparent 50%, rgba(78, 205, 196, 0.016) 100%);

  /* 导航文字 */
  --color-nav-text: #3d4d5c;

  /* 导航联系我们 · 明亮高级蓝 */
  --color-contact-blue-muted: #3d96db;
  --color-contact-blue: #52aae8;
  --color-contact-blue-shadow: rgba(61, 150, 219, 0.28);

  /* 玻璃胶囊 */
  --glass-bg: rgba(220, 226, 232, 0.55);
  --glass-bg-active: rgba(210, 218, 226, 0.65);
  --glass-border: rgba(30, 51, 72, 0.22);
  --glass-border-active: rgba(22, 42, 61, 0.38);

  /* 圆角 */
  --radius-image: 6px;
  --radius-button: 9px;
  --radius-contact: 14px;
  --radius-product-card: 16px;

  /* 动效：平滑、轻柔、快速 */
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.2s var(--ease-smooth);
  --transition-normal: 0.28s var(--ease-smooth);

  /* Banner 高度 */
  --header-height: 5rem;
  --header-height-scrolled: 3.75rem;

  /* 全宽内容区左右边距（rem/px 随浏览器缩放；避免 vw） */
  --layout-gutter: 1.5rem;

  /* 流体间距（rem，随页面缩放与根字号变化） */
  --fluid-gap-sm: 0.625rem;
  --fluid-gap-md: 1rem;
  --fluid-gap-lg: 1.25rem;
  --fluid-gap-xl: 2rem;
  --section-pad-y: 3.5rem;
  /* 大屏高度：JS 按缩放实时写入 --hero-height；此处为未执行 JS 时的回退 */
  --hero-height-cap: 50rem;
  --hero-height: var(--hero-height-cap);
  --font-section-title: 1.75rem;
  --font-card-title: 0.9375rem;
  --font-card-desc: 0.8125rem;

  /* 页脚：深藏蓝（略偏蓝、略浅） */
  --color-bg-footer: #243c56;
  --color-bg-footer-deep: #1f354d;
  --color-footer-heading: #ffffff;
  --color-footer-text: #9aabb8;
  --color-footer-text-hover: #ffffff;
  --color-footer-copyright: #6d7f8f;
  --color-footer-divider: rgba(255, 255, 255, 0.1);
}

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

html {
  scroll-behavior: smooth;
  overflow-x: clip;
  font-size: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-nav-text);
  background-color: #ffffff;
  background-image: linear-gradient(180deg, rgba(236, 250, 247, 0.32) 0%, rgba(255, 255, 255, 0) 42%);
  background-attachment: fixed;
  min-height: 100vh;
  padding-top: var(--header-height);
  transition: padding-top var(--transition-normal);
}

body.header-scrolled {
  padding-top: var(--header-height-scrolled);
}

/* 标题 / 大文字：黑蓝色 */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-title);
  font-weight: 600;
  line-height: 1.35;
}

/* 长文本突出词汇：高级浅绿强调 */
.text-highlight {
  color: var(--color-light-green-muted);
  font-weight: 500;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
}

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

/* ============================================================
   图片模块样式（预定义，后续页面使用）
   ============================================================ */
.img-module {
  width: 100%;
  border-radius: var(--radius-image);
  border: 1px solid transparent;
  overflow: hidden;
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.img-module:hover {
  border-color: var(--color-light-green-border);
  box-shadow: 0 4px 18px var(--color-light-green-shadow);
}

.img-module > img {
  width: 100%;
  max-width: 100%;
  height: auto;
}

/* 比例图片：比例写在 img 上，容器仅 width:100%，随页面缩放 */
.img-fit-contain {
  object-fit: contain;
  object-position: center;
}

.img-fit-cover {
  object-fit: cover;
  object-position: center;
}

:is(#applications, #company-profile, #production, #service, #certificates) .img-module img {
  transition: transform var(--transition-normal);
}

:is(#applications, #company-profile, #production, #service, #certificates) .img-module:hover img {
  transform: scale(1.04);
}

/* ============================================================
   可点击按钮样式（预定义，后续页面使用）
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  border-radius: var(--radius-button);
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    background-color var(--transition-fast),
    color var(--transition-fast);
}

/* 未选中：低饱和深蓝填充 */
.btn--default {
  background-color: var(--color-deep-blue-muted);
  color: #e8edf2;
}

/* 当前选中：低饱和浅绿填充 */
.btn--active {
  background-color: var(--color-light-green-muted);
  color: #f0f5f2;
}

.btn:hover {
  transform: scale(1.04);
  border-color: var(--color-light-green-border);
  box-shadow: 0 4px 16px var(--color-light-green-shadow);
}

/* 多按钮并列容器 */
.btn-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* ============================================================
   顶部 Banner 导航栏
   ============================================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background-color: var(--color-bg-banner);
  border-bottom: 1px solid var(--color-light-green);
  transition:
    height var(--transition-normal),
    background-color var(--transition-normal),
    backdrop-filter var(--transition-normal),
    -webkit-backdrop-filter var(--transition-normal),
    box-shadow var(--transition-normal),
    border-color var(--transition-normal);
}

/* 滚动后：玻璃透明模糊 */
.site-header.is-scrolled {
  height: var(--header-height-scrolled);
  background-color: var(--color-bg-banner-glass);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border-bottom-color: transparent;
  box-shadow: 0 1px 0 rgba(30, 51, 72, 0.06);
}

.header-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  width: 100%;
  height: 100%;
  padding-inline: var(--layout-gutter);
}

/* ---------- LOGO（左栏） ---------- */
.header-logo {
  justify-self: start;
  flex-shrink: 0;
  transition: opacity var(--transition-fast);
}

.header-logo:hover {
  opacity: 0.85;
}

.logo-img {
  height: 2.875rem;
  width: auto;
  max-width: 100%;
  transition: height var(--transition-normal);
}

.site-header.is-scrolled .logo-img {
  height: 2.375rem;
}

/* ---------- 导航菜单（中栏居中） ---------- */
.header-nav {
  justify-self: center;
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-item {
  position: relative;
}

/* ---------- 导航链接通用 ---------- */
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-nav-text);
  border-radius: 999px;
  border: 1px solid transparent;
  white-space: nowrap;
  transition:
    color var(--transition-fast),
    transform var(--transition-fast),
    border-color var(--transition-fast),
    background-color var(--transition-fast);
}

/* 玻璃胶囊框（伪元素层，悬浮/当前页时显现） */
.nav-link::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 999px;
  border: 1px solid transparent;
  background-color: transparent;
  opacity: 0;
  transition:
    opacity var(--transition-fast),
    border-color var(--transition-fast),
    background-color var(--transition-fast);
  z-index: -1;
}

/* 【非当前页】悬浮：轻微放大 → 高级深蓝 + 玻璃胶囊 */
.nav-link:not(.is-active):hover {
  color: var(--color-deep-blue);
  transform: scale(1.05);
}

.nav-link:not(.is-active):hover::before {
  opacity: 1;
  border-color: var(--glass-border);
  background-color: var(--glass-bg);
}

/* 【当前页】：黑蓝色 + 胶囊常驻 */
.nav-link.is-active {
  color: var(--color-title);
}

.nav-link.is-active::before {
  opacity: 1;
  border-color: var(--glass-border-active);
  background-color: var(--glass-bg-active);
}

/* 【当前页】悬浮：仅放大，不变色 */
.nav-link.is-active:hover {
  transform: scale(1.05);
  color: var(--color-title);
}

/* 下拉箭头 */
.nav-arrow {
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.nav-item--dropdown.is-open .nav-arrow {
  transform: rotate(180deg);
}

/* 产品中心：链接跳转 + 箭头下拉 */
.nav-dropdown-trigger {
  position: relative;
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  transition: transform var(--transition-fast);
}

.nav-dropdown-trigger::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 999px;
  border: 1px solid transparent;
  background-color: transparent;
  opacity: 0;
  transition:
    opacity var(--transition-fast),
    border-color var(--transition-fast),
    background-color var(--transition-fast);
  z-index: -1;
}

.nav-dropdown-trigger:not(.is-active):hover {
  transform: scale(1.05);
}

.nav-dropdown-trigger:not(.is-active):hover::before {
  opacity: 1;
  border-color: var(--glass-border);
  background-color: var(--glass-bg);
}

.nav-dropdown-trigger:not(.is-active):hover .nav-link,
.nav-dropdown-trigger:not(.is-active):hover .nav-dropdown-toggle {
  color: var(--color-deep-blue);
}

.nav-dropdown-trigger.is-active::before {
  opacity: 1;
  border-color: var(--glass-border-active);
  background-color: var(--glass-bg-active);
}

.nav-dropdown-trigger .nav-link {
  padding: 8px 6px 8px 18px;
}

.nav-dropdown-trigger .nav-link::before {
  display: none;
}

.nav-dropdown-trigger .nav-link:hover {
  transform: none;
  color: inherit;
}

.nav-dropdown-trigger.is-active .nav-link:hover {
  color: var(--color-title);
}

.nav-dropdown-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 14px 8px 2px;
  color: var(--color-nav-text);
  border-radius: 0 999px 999px 0;
  transition: color var(--transition-fast);
}

.nav-dropdown-trigger.is-active .nav-link,
.nav-dropdown-trigger.is-active .nav-dropdown-toggle {
  color: var(--color-title);
}

/* ---------- 产品中心下拉菜单 ---------- */
.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  min-width: 140px;
  padding: 6px;
  background: rgba(244, 246, 249, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(30, 51, 72, 0.1);
  border-radius: 10px;
  box-shadow: 0 8px 28px rgba(30, 51, 72, 0.08);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity var(--transition-fast),
    transform var(--transition-fast),
    visibility var(--transition-fast);
}

.nav-item--dropdown.is-open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.dropdown-link {
  display: block;
  padding: 9px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-nav-text);
  border-radius: 7px;
  transition:
    color var(--transition-fast),
    background-color var(--transition-fast),
    transform var(--transition-fast);
}

.dropdown-link:hover {
  color: var(--color-deep-blue);
  background-color: var(--glass-bg);
  transform: scale(1.03);
}

/* ---------- 联系我们：明亮高级蓝 + 与页脚一致的交互 ---------- */
.nav-contact-btn {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 11px 26px;
  font-size: 16px;
  font-weight: 500;
  color: #f5f8fb;
  background-color: var(--color-contact-blue-muted);
  border: none;
  border-radius: var(--radius-contact);
  box-shadow: 0 4px 18px var(--color-contact-blue-shadow);
  white-space: nowrap;
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    background-color var(--transition-fast);
}

.nav-contact-btn:hover {
  transform: translateY(-2px) scale(1.03);
  background-color: var(--color-contact-blue);
  box-shadow: 0 8px 26px rgba(61, 150, 219, 0.32);
}

.contact-icon {
  flex-shrink: 0;
  width: 1em;
  height: 1em;
  opacity: 0.92;
  transition: transform var(--transition-fast);
}

.nav-contact-btn:hover .contact-icon {
  transform: scale(1.08);
}

/* 滚动后联系按钮略缩小 */
.site-header.is-scrolled .nav-contact-btn {
  padding: 9px 22px;
  font-size: 15px;
}

/* ============================================================
   首页内容板块
   ============================================================ */
.section-inner {
  width: 100%;
  padding-inline: var(--layout-gutter);
}

.home-section {
  padding: var(--section-pad-y) 0;
  background-color: var(--color-bg-page);
  background-image: var(--section-grad-lr);
}

.home-section--alt {
  background-color: var(--color-bg-page-alt);
  background-image: var(--section-grad-rl);
}

/* 板块标题 */
.section-header {
  margin-bottom: 2rem;
}

.section-header--row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.section-title {
  font-size: var(--font-section-title);
  font-weight: 600;
  color: var(--color-title);
  letter-spacing: 0.04em;
}

.section-subtitle {
  margin-top: 8px;
  font-size: 12px;
  font-weight: 400;
  color: var(--color-nav-text);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.75;
}

/* ---------- 1. Hero 轮播 ---------- */
.hero-section {
  background: var(--color-bg-banner);
  border-bottom: 1px solid rgba(30, 51, 72, 0.06);
}

.hero-slider {
  position: relative;
  overflow: hidden;
  width: 100%;
  height: var(--hero-height);
}

.hero-track {
  position: relative;
  width: 100%;
  height: 100%;
}

.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.5s var(--ease-smooth);
  pointer-events: none;
  background: var(--color-bg-banner);
  overflow: hidden;
}

.hero-slide.is-active {
  opacity: 1;
  pointer-events: auto;
}

.hero-slide img {
  width: 100%;
  max-width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  color: var(--color-title);
  background: rgba(247, 249, 252, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(30, 51, 72, 0.1);
  border-radius: 50%;
  opacity: 0;
  transition:
    opacity var(--transition-normal),
    transform var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.hero-arrow--prev { left: 24px; }
.hero-arrow--next { right: 24px; }

.hero-section:hover .hero-arrow {
  opacity: 1;
}

.hero-arrow:hover {
  transform: translateY(-50%) scale(1.06);
  border-color: var(--color-light-green-border);
  box-shadow: 0 4px 14px var(--color-light-green-shadow);
}

.hero-dots {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 14px;
  isolation: isolate;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.hero-section:hover .hero-dots {
  opacity: 1;
}

/* 圆点：小灰点 + 流动指示器（从当前点跑出、放大包裹目标点） */
.hero-dots__indicator {
  position: absolute;
  top: 50%;
  left: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  color: rgba(72, 80, 90, 0.88);
  font-size: 11px;
  font-weight: 500;
  background: rgba(228, 231, 235, 0.94);
  border: 1px solid rgba(128, 136, 146, 0.28);
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(40, 50, 62, 0.06);
  pointer-events: none;
  transform: translate3d(0, -50%, 0) scale(1);
  transform-origin: center center;
}

.hero-dots__indicator-num {
  opacity: 1;
  transition: opacity 0.12s ease;
}

.hero-dot {
  position: relative;
  z-index: 0;
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
}

.hero-dot::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 5px;
  height: 5px;
  margin: -2.5px 0 0 -2.5px;
  border-radius: 50%;
  background: rgba(138, 146, 154, 0.48);
  transition: background 0.2s ease;
}

.hero-dot.is-active::before {
  opacity: 0;
}

.hero-dot:hover::before {
  background: rgba(118, 126, 136, 0.62);
}

/* ---------- 2. 公司简介（上下结构 + 悬停显示滚动条） ---------- */
#about {
  padding: 72px 0;
}

#about .section-header {
  margin-bottom: 36px;
}

.about-scroll {
  width: 100%;
  max-height: 220px;
  overflow-y: auto;
  padding-right: 10px;
  scrollbar-width: thin;
  scrollbar-color: transparent transparent;
}

.about-scroll:hover {
  scrollbar-color: var(--color-light-green-scrollbar) transparent;
}

.about-scroll::-webkit-scrollbar {
  width: 3px;
}

.about-scroll::-webkit-scrollbar-track {
  background: transparent;
}

.about-scroll::-webkit-scrollbar-thumb {
  background: transparent;
  border-radius: 2px;
  transition: background var(--transition-fast);
}

.about-scroll:hover::-webkit-scrollbar-thumb {
  background: var(--color-light-green-scrollbar);
}

.about-content {
  width: 100%;
}

.about-content p {
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--color-nav-text);
  line-height: 1.9;
  margin-bottom: 22px;
  text-align: justify;
  text-justify: inter-ideograph;
}

.about-content p:last-child {
  margin-bottom: 0;
}

/* ---------- 3. 产品展示 ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--fluid-gap-md);
}

.product-card {
  text-align: center;
  min-width: 0;
}

.product-card__link {
  display: block;
}

.product-card__img {
  width: 100%;
  margin-bottom: var(--fluid-gap-sm);
  overflow: hidden;
  background: #fff;
}

.product-card__img img {
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  object-position: center;
  background: #fff;
  transition: transform var(--transition-normal);
}

.product-card__link:hover .product-card__img img {
  transform: scale(1.04);
}

.product-card__name {
  font-size: var(--font-card-desc);
  font-weight: 500;
  color: var(--color-title);
  transition: color var(--transition-fast);
}

.product-card__link:hover .product-card__name {
  color: var(--color-deep-blue);
}

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 48px;
}

.pagination-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 12px;
  font-size: 13px;
  font-weight: 500;
  color: #e8edf2;
  background-color: var(--color-deep-blue-muted);
  border: 1px solid transparent;
  border-radius: var(--radius-button);
  cursor: pointer;
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    background-color var(--transition-fast);
}

.pagination-btn--arrow {
  width: 38px;
  min-width: 38px;
  padding: 0;
  color: var(--color-title);
  background: rgba(247, 249, 252, 0.85);
  border: 1px solid rgba(30, 51, 72, 0.1);
  border-radius: 50%;
}

.pagination-btn:hover:not(:disabled) {
  transform: scale(1.04);
  border-color: var(--color-light-green-border);
  box-shadow: 0 4px 14px var(--color-light-green-shadow);
}

.pagination-btn--arrow:hover:not(:disabled) {
  transform: scale(1.06);
}

.pagination-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.pagination-page {
  min-width: 36px;
}

.pagination-page.is-active {
  background-color: var(--color-light-green-muted);
  color: #f0f5f2;
}

/* ---------- 4. 合作伙伴 ---------- */
.partners-marquee {
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}

.partners-track {
  display: flex;
  align-items: center;
  gap: 48px;
  width: max-content;
  animation: partners-scroll 40s linear infinite;
}

.partners-marquee:hover .partners-track {
  animation-play-state: paused;
}

@keyframes partners-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.partner-item {
  flex-shrink: 0;
}

.partner-item img {
  height: 2.5em;
  width: auto;
  max-width: 100%;
  filter: grayscale(100%) opacity(0.55);
  transition:
    filter var(--transition-normal),
    opacity var(--transition-normal),
    transform var(--transition-fast);
}

.partner-item:hover img {
  filter: grayscale(0%) opacity(1);
  transform: scale(1.05);
}

/* ---------- 5. 应用现场 ---------- */
.app-carousel {
  position: relative;
}

.app-carousel-viewport {
  overflow: hidden;
  /* 为悬停上浮留出空间，避免上沿被裁切 */
  padding: 4px 0 8px;
  box-sizing: border-box;
}

.app-carousel-track {
  display: flex;
  gap: var(--fluid-gap-md);
  transition: transform 0.45s var(--ease-smooth);
  will-change: transform;
}

.app-card {
  min-width: 0;
  flex-shrink: 0;
}

/* 桌面：一页 4 张，图片间距固定 200px */
.app-carousel[data-visible="4"] .app-carousel-viewport {
  --app-gap: 50px;
  --app-card-w: calc((100% - var(--app-gap) * 3) / 4);
}

.app-carousel[data-visible="4"] .app-carousel-track {
  gap: var(--app-gap);
}

.app-carousel[data-visible="4"] .app-card {
  flex: 0 0 var(--app-card-w);
  width: var(--app-card-w);
}

.app-carousel[data-visible="2"] .app-carousel-viewport {
  --app-card-w: calc((100% - var(--fluid-gap-md)) / 2);
}

.app-carousel[data-visible="2"] .app-carousel-track {
  gap: var(--fluid-gap-md);
}

.app-carousel[data-visible="2"] .app-card {
  flex: 0 0 var(--app-card-w);
  width: var(--app-card-w);
}

.app-carousel[data-visible="1"] .app-card {
  flex: 0 0 100%;
  width: 100%;
}

.app-card__img {
  width: 100%;
  overflow: hidden;
}

.app-card__img img {
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  object-position: center;
}

.app-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  color: var(--color-title);
  background: rgba(247, 249, 252, 0.85);
  border: 1px solid rgba(30, 51, 72, 0.1);
  border-radius: 50%;
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.app-arrow--prev { left: -12px; }
.app-arrow--next { right: -12px; }

.app-arrow:hover {
  transform: translateY(-50%) scale(1.06);
  border-color: var(--color-light-green-border);
  box-shadow: 0 4px 14px var(--color-light-green-shadow);
}

.app-arrow:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

/* ============================================================
   产品中心页
   ============================================================ */
.products-page {
  padding: 2.5rem 0 4.5rem;
  background-color: var(--color-bg-page);
  background-image: var(--section-grad-lr);
}

.products-page__header .section-title {
  font-size: 1.75rem;
}

.products-body {
  display: grid;
  grid-template-columns: 13.75rem minmax(0, 1fr);
  gap: var(--fluid-gap-xl);
  align-items: stretch;
  margin-top: 1.75rem;
}

/* 左列撑满行高，sticky 才有滚动空间 */
.category-card-wrap {
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

.category-card-sentinel {
  height: 1px;
  margin-bottom: -1px;
  pointer-events: none;
  visibility: hidden;
}

.category-card {
  position: sticky;
  top: calc(var(--header-height) + 16px);
  align-self: flex-start;
  width: 100%;
  z-index: 10;
  padding: 20px;
  background: rgba(247, 249, 252, 0.7);
  border: 1px solid rgba(30, 51, 72, 0.08);
  border-radius: var(--radius-button);
  box-shadow: 0 2px 14px rgba(30, 51, 72, 0.04);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition:
    top var(--transition-normal),
    box-shadow var(--transition-normal),
    border-color var(--transition-normal);
}

body.header-scrolled .category-card {
  top: calc(var(--header-height-scrolled) + 16px);
}

.category-card.is-stuck {
  border-color: rgba(30, 51, 72, 0.12);
  box-shadow: 0 8px 28px rgba(30, 51, 72, 0.1);
}

.category-tabs {
  flex-direction: column;
  width: 100%;
  gap: 10px;
}

.category-tabs .btn {
  width: 100%;
}

.products-display {
  min-width: 0;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--fluid-gap-lg);
}

.product-item-card {
  background: rgba(255, 255, 255, 0.38);
  border: 1px solid transparent;
  border-radius: var(--radius-product-card);
  padding: 0.75rem;
  min-width: 0;
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
}

.product-item-card:hover {
  border-color: var(--color-light-green-border);
  box-shadow: 0 6px 22px var(--color-light-green-shadow);
  transform: translateY(-2px);
}

.product-item-card__link {
  display: block;
}

.product-item-card__img {
  width: 100%;
  margin-bottom: var(--fluid-gap-sm);
  overflow: hidden;
  border-radius: calc(var(--radius-product-card) - 4px);
  background: #fff;
}

.product-item-card__img img {
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  object-position: center;
  background: #fff;
  transition: transform var(--transition-normal);
}

.product-item-card:hover .product-item-card__img img {
  transform: scale(1.04);
}

.product-item-card__name {
  font-size: var(--font-card-title);
  font-weight: 600;
  color: var(--color-title);
  margin-bottom: 8px;
  line-height: 1.4;
  transition: color var(--transition-fast);
}

.product-item-card:hover .product-item-card__name {
  color: var(--color-deep-blue);
}

.product-item-card__condition {
  font-size: var(--font-card-desc);
  font-weight: 400;
  color: var(--color-nav-text);
  line-height: 1.6;
  opacity: 0.85;
}

.pagination--text {
  margin-top: 48px;
}

.pagination-info {
  min-width: 56px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-title);
  text-align: center;
  letter-spacing: 0.04em;
}

/* ============================================================
   产品详情页
   ============================================================ */
.product-detail-page {
  padding: 56px 0 100px;
  background-color: var(--color-bg-page);
  background-image: var(--section-grad-lr);
}

.product-detail__header {
  margin-bottom: 28px;
}

.product-detail__header .section-title {
  font-size: 32px;
}

.product-detail__model {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-title);
  letter-spacing: 0.03em;
  line-height: 1.4;
}

.product-detail__divider {
  width: min(240px, 32%);
  height: 2px;
  margin: 24px 0 40px;
  background: linear-gradient(
    90deg,
    var(--color-light-green-border) 0%,
    var(--color-light-green-muted) 100%
  );
  border-radius: 1px;
  opacity: 0.85;
}

.product-detail__body {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: stretch;
}

.product-detail__media {
  width: 100%;
  overflow: hidden;
  border-radius: calc(var(--radius-product-card) - 4px);
  background: #fff;
}

.product-detail__media img {
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  object-position: center;
  background: #fff;
}

.product-detail__info {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 0;
}

.detail-block {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 20px 0;
  border-bottom: 1px solid rgba(78, 205, 196, 0.38);
}

.detail-block:first-child {
  padding-top: 0;
}

.detail-block:last-child {
  padding-bottom: 0;
}

.detail-block__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-title);
  margin-bottom: 10px;
  letter-spacing: 0.04em;
}

.detail-block__text {
  font-size: 14px;
  font-weight: 400;
  color: var(--color-nav-text);
  line-height: 1.85;
}

.detail-spec-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.detail-spec-list--two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 28px;
  row-gap: 8px;
}

.detail-spec-list li {
  position: relative;
  padding-left: 14px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--color-nav-text);
}

.detail-spec-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 4px;
  height: 4px;
  margin-top: -2px;
  border-radius: 50%;
  background: var(--color-light-green-muted);
}

/* ============================================================
   关于我们页
   ============================================================ */
.about-page-header {
  padding: 56px 0 16px;
}

.about-page-header .section-title {
  font-size: 32px;
}

.about-module {
  padding: 2.75rem 0;
  background-color: var(--color-bg-page);
  background-image: var(--section-grad-lr);
}

.about-module--alt {
  background-color: var(--color-bg-page-alt);
  background-image: var(--section-grad-rl);
}

.about-module--last {
  padding-bottom: 100px;
}

.about-module--compact {
  padding: 44px 0;
}

.about-module__header {
  margin-bottom: 40px;
}

.about-module__header--compact {
  margin-bottom: 28px;
}

.about-module__title {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-title);
  letter-spacing: 0.04em;
}

.about-module__subtitle {
  margin-top: 6px;
  font-size: 11px;
  font-weight: 400;
  color: var(--color-nav-text);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.75;
}

.about-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

/* 公司简介：等高 + 悬停滚动条 + 16:9 图片 */
.about-split--profile {
  grid-template-columns: auto 1fr;
  gap: 100px;
  align-items: start;
}

.about-split--profile .about-split__media {
  width: min(100%, calc(28.875rem - 100px));
  aspect-ratio: 16 / 9;
}

.about-split--profile .about-split__media img {
  width: 100%;
  height: 100%;
  aspect-ratio: auto;
  object-fit: cover;
  object-position: center;
}

.about-profile-scroll {
  overflow-y: auto;
  font-size: 1.125rem;
  padding-left: 0;
  padding-right: 8px;
  scrollbar-width: thin;
  scrollbar-color: transparent transparent;
  align-self: start;
}

.about-profile-scroll:hover {
  scrollbar-color: var(--color-light-green-scrollbar) transparent;
}

.about-profile-scroll::-webkit-scrollbar {
  width: 3px;
}

.about-profile-scroll::-webkit-scrollbar-track {
  background: transparent;
}

.about-profile-scroll::-webkit-scrollbar-thumb {
  background: transparent;
  border-radius: 2px;
  transition: background var(--transition-fast);
}

.about-profile-scroll:hover::-webkit-scrollbar-thumb {
  background: var(--color-light-green-scrollbar);
}

.about-profile-text p {
  font-size: 1.125rem;
  font-weight: 400;
  line-height: 1.85;
  color: var(--color-nav-text);
  margin-bottom: 16px;
  text-align: justify;
  text-justify: inter-ideograph;
}

.about-profile-text p:last-child {
  margin-bottom: 0;
}

.about-split--reverse .about-split__media {
  order: 2;
}

.about-split--reverse .about-split__content {
  order: 1;
}

.about-split__content p {
  font-size: 15px;
  line-height: 1.85;
  margin-bottom: 16px;
  color: var(--color-nav-text);
}

.about-split__content p:last-child {
  margin-bottom: 0;
}

/* 资质证书 */
#certificates.about-module--compact {
  padding: 1.75rem 0;
}

.cert-carousel {
  display: flex;
  align-items: center;
  gap: 12px;
}

.cert-body {
  flex: 1;
  min-width: 0;
}

.cert-viewport {
  overflow: hidden;
  width: 100%;
  /* 为悬停上浮、边框与阴影留出空间，避免上沿被裁切 */
  padding: 4px 0 12px;
  box-sizing: border-box;
  --cert-visible-count: 4;
  --cert-split-w: calc((100% - var(--fluid-gap-xl) * 3) / var(--cert-visible-count));
  --cert-card-w: calc(var(--cert-split-w) * 0.74);
  --cert-gap: calc((100% - var(--cert-card-w) * var(--cert-visible-count)) / (var(--cert-visible-count) - 1));
}

.cert-track {
  display: flex;
  gap: var(--cert-gap);
  will-change: transform;
  transition: transform 0.45s var(--ease-smooth);
}

.cert-card {
  flex: 0 0 var(--cert-card-w);
  width: var(--cert-card-w);
  min-width: 0;
  text-align: center;
  border-radius: var(--radius-product-card);
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.cert-card:hover {
  transform: translateY(-2px);
}

.cert-card img {
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 220 / 290;
  object-fit: cover;
  object-position: center top;
  transform-origin: center top;
}

.cert-card--contain img {
  object-fit: contain;
  background: #f5f7fa;
}

.cert-card figcaption {
  padding: 0.375rem 0.5rem;
  font-size: var(--font-card-desc);
  font-weight: 500;
  color: var(--color-title);
  background: rgba(255, 255, 255, 0.45);
}

.cert-arrow {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  color: var(--color-title);
  background: rgba(247, 249, 252, 0.85);
  border: 1px solid rgba(30, 51, 72, 0.1);
  border-radius: 50%;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    opacity 0.15s ease,
    visibility 0s linear 0.15s;
}

#certificates:hover .cert-arrow {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    opacity 0.2s ease,
    visibility 0s;
}

.cert-arrow:hover {
  transform: scale(1.06);
  border-color: var(--color-light-green-border);
  box-shadow: 0 4px 14px var(--color-light-green-shadow);
}

/* 生产能力 */
.prod-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--fluid-gap-md);
}

.prod-step {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.prod-step__title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-title);
  letter-spacing: 0.04em;
  margin-bottom: var(--fluid-gap-sm);
}

.prod-step__img {
  width: 100%;
  overflow: hidden;
  border-radius: calc(var(--radius-product-card) - 4px);
  margin-bottom: var(--fluid-gap-sm);
}

.prod-step__img img {
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  object-position: center;
}

.prod-step__desc p {
  font-size: var(--font-card-desc);
  line-height: 1.8;
  color: var(--color-nav-text);
}

.about-module__intro {
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-nav-text);
  max-width: 720px;
  margin: -8px 0 32px;
}

.qc-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.qc-card {
  padding: 18px 16px;
  background: rgba(255, 255, 255, 0.38);
  border: 1px solid rgba(30, 51, 72, 0.06);
  border-radius: var(--radius-product-card);
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.qc-card:hover {
  border-color: var(--color-light-green-border);
  box-shadow: 0 4px 16px var(--color-light-green-shadow);
}

.qc-card__title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-title);
  margin-bottom: 8px;
}

.qc-card__text {
  font-size: 12px;
  line-height: 1.7;
  color: var(--color-nav-text);
}

/* 客户服务 */
.service-layout {
  display: grid;
  grid-template-columns: minmax(0, 28.875rem) 1fr;
  gap: 3rem;
  align-items: start;
}

.service-layout__media {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: calc(var(--radius-product-card) - 4px);
}

.service-layout__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.service-list {
  display: flex;
  flex-direction: column;
  min-height: 15rem;
}

.service-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-bottom: 18px;
  margin-bottom: 18px;
  border-bottom: 1px solid rgba(78, 205, 196, 0.38);
}

.service-item:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
}

.service-item__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-title);
  margin-bottom: 8px;
}

.service-item__text {
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-nav-text);
}

/* 应用选型 · 暂未开放 */
.application-page {
  position: relative;
  padding: 72px 0 120px;
  background-color: var(--color-bg-page);
  background-image: var(--section-grad-lr);
  overflow: hidden;
}

.application-page__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(30, 51, 72, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 51, 72, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 20%, transparent 100%);
  pointer-events: none;
}

.application-page__inner {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin-inline: auto;
  text-align: center;
}

.application-status {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 28px;
  padding: 8px 18px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--color-deep-blue-muted);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(78, 205, 196, 0.28);
  border-radius: 999px;
  box-shadow: 0 4px 20px rgba(30, 51, 72, 0.06);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.application-status__pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-light-green);
  box-shadow: 0 0 0 0 rgba(78, 205, 196, 0.45);
  animation: application-pulse 2.4s ease-out infinite;
}

@keyframes application-pulse {
  0% { box-shadow: 0 0 0 0 rgba(78, 205, 196, 0.45); }
  70% { box-shadow: 0 0 0 8px rgba(78, 205, 196, 0); }
  100% { box-shadow: 0 0 0 0 rgba(78, 205, 196, 0); }
}

.application-page__header {
  margin-bottom: 36px;
}

.application-page__header .section-title {
  font-size: 32px;
}

.application-panel {
  padding: 40px 44px 36px;
  text-align: left;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(30, 51, 72, 0.08);
  border-radius: var(--radius-product-card);
  box-shadow:
    0 12px 40px rgba(30, 51, 72, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.application-panel__state {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-title);
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.application-panel__desc {
  font-size: 14px;
  line-height: 1.9;
  color: var(--color-nav-text);
  margin-bottom: 22px;
}

.application-panel__meta {
  list-style: none;
  margin: 0 0 22px;
  padding: 16px 0 0;
  border-top: 1px solid rgba(78, 205, 196, 0.22);
  display: grid;
  gap: 10px;
}

.application-panel__meta li {
  position: relative;
  padding-left: 16px;
  font-size: 13px;
  color: var(--color-deep-blue-muted);
  letter-spacing: 0.04em;
}

.application-panel__meta li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 5px;
  height: 1px;
  background: var(--color-light-green-muted);
}

.application-panel__note {
  font-size: 13px;
  line-height: 1.8;
  color: var(--color-nav-text);
  margin-bottom: 28px;
}

.application-panel__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

.application-panel__cta {
  display: inline-flex;
  align-items: center;
  padding: 11px 28px;
  font-size: 14px;
  font-weight: 500;
  color: #f5f8fb;
  background-color: var(--color-light-green-muted);
  border-radius: var(--radius-contact);
  box-shadow: 0 4px 18px var(--color-light-green-shadow);
  transition:
    transform var(--transition-fast),
    background-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.application-panel__cta:hover {
  transform: translateY(-2px);
  background-color: var(--color-light-green);
  box-shadow: 0 8px 26px rgba(78, 205, 196, 0.32);
}

.application-panel__link {
  font-size: 14px;
  color: var(--color-deep-blue-muted);
  transition: color var(--transition-fast);
}

.application-panel__link:hover {
  color: var(--color-light-green-muted);
}

@media (max-width: 768px) {
  .application-page {
    padding: 48px 0 80px;
  }

  .application-panel {
    padding: 28px 24px 24px;
  }

  .application-panel__state {
    font-size: 20px;
  }
}

/* 联系我们页 */
.contact-page {
  padding: 56px 0 100px;
  background-color: var(--color-bg-page);
  background-image: var(--section-grad-lr);
}

.contact-page__header {
  margin-bottom: 40px;
}

.contact-page__header .section-title {
  font-size: 32px;
}

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

.contact-map {
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: calc(var(--radius-product-card) - 4px);
}

.contact-map img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.contact-side {
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-height: 27.5rem;
}

.contact-company {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-title);
  letter-spacing: 0.04em;
  line-height: 1.4;
  flex-shrink: 0;
}

.contact-card {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  padding: 24px 28px;
  background: rgba(255, 255, 255, 0.38);
  border: 1px solid rgba(30, 51, 72, 0.06);
  border-radius: var(--radius-product-card);
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.contact-card::after {
  content: '';
  flex: 1;
  min-height: 0;
}

.contact-card:hover {
  border-color: var(--color-light-green-border);
  box-shadow: 0 4px 16px var(--color-light-green-shadow);
}

.contact-card__body {
  flex: 2;
  min-height: 0;
  display: grid;
  grid-template-rows: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.contact-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 0;
}

.contact-field__label {
  flex-shrink: 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-title);
}

.contact-field__box {
  flex: 1;
  min-height: 0;
  display: flex;
  align-items: center;
  padding: 12px 16px;
  background: rgba(216, 224, 234, 0.55);
  border: 1px dashed rgba(30, 51, 72, 0.16);
  border-radius: var(--radius-image);
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.contact-field__box:hover {
  border-color: var(--color-light-green-border);
  box-shadow: 0 4px 14px var(--color-light-green-shadow);
}

.contact-field__box p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-nav-text);
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  margin-top: auto;
}

.footer-top {
  background:
    radial-gradient(ellipse 100% 65% at 20% 0%, rgba(50, 80, 115, 0.38) 0%, transparent 55%),
    radial-gradient(ellipse 70% 50% at 90% 100%, rgba(40, 70, 105, 0.22) 0%, transparent 50%),
    linear-gradient(175deg, var(--color-bg-footer) 0%, var(--color-bg-footer-deep) 100%);
}

.footer-top-inner {
  display: grid;
  grid-template-columns: auto repeat(3, 1fr);
  grid-template-rows: auto auto;
  gap: 20px 56px;
  width: 100%;
  padding: 44px var(--layout-gutter) 28px;
  position: relative;
  align-items: start;
}

/* 左侧品牌：透明 LOGO，与 Banner 一致 */
.footer-brand {
  grid-column: 1;
  grid-row: 1 / 3;
}

.footer-logo {
  display: inline-block;
  transition: opacity var(--transition-fast);
}

.footer-logo:hover {
  opacity: 0.85;
}

.footer-logo-img {
  height: 2.5rem;
  width: auto;
  max-width: 100%;
}

.footer-company-name,
.footer-company-name-en {
  font-size: 11px;
  font-weight: 400;
  color: var(--color-footer-text);
  letter-spacing: 0.02em;
  line-height: 1.5;
}

.footer-company-name {
  margin-top: 12px;
}

.footer-company-name-en {
  margin-top: 4px;
}

/* 三列模块：等宽均匀分布 */
.footer-nav {
  grid-column: 2;
  grid-row: 1;
}

.footer-contact-block {
  grid-column: 3;
  grid-row: 1;
}

.footer-address-block {
  grid-column: 4;
  grid-row: 1;
}

.footer-heading {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-footer-heading);
  margin-bottom: 14px;
  letter-spacing: 0.06em;
}

.footer-nav-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.footer-nav-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav-list a {
  font-size: 14px;
  font-weight: 400;
  color: var(--color-footer-text);
  transition: color var(--transition-fast);
}

.footer-nav-list a:hover {
  color: var(--color-footer-text-hover);
}

/* 联系方式 / 地址：纯文本，无交互 */
.footer-text-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-text-list li,
.footer-address {
  font-size: 14px;
  font-weight: 400;
  color: var(--color-footer-text);
  line-height: 1.7;
}

.footer-address {
  max-width: 200px;
}

/* 页脚联系我们按钮：纯色浅绿 + 白字 */
.footer-contact-btn {
  grid-column: 4;
  grid-row: 2;
  justify-self: end;
  align-self: end;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 500;
  color: #f5f8fb;
  background-color: var(--color-light-green-muted);
  border: none;
  border-radius: var(--radius-contact);
  box-shadow: 0 4px 18px var(--color-light-green-shadow);
  white-space: nowrap;
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    background-color var(--transition-fast);
}

.footer-contact-btn:hover {
  transform: translateY(-2px) scale(1.03);
  background-color: var(--color-light-green);
  box-shadow: 0 8px 26px rgba(78, 205, 196, 0.32);
}

.footer-contact-icon {
  flex-shrink: 0;
  width: 1em;
  height: 1em;
  opacity: 0.92;
  transition: transform var(--transition-fast);
}

.footer-contact-btn:hover .footer-contact-icon {
  transform: scale(1.08);
}

/* 底部版权区 */
.footer-bottom {
  border-top: 1px solid var(--color-footer-divider);
  background: var(--color-bg-footer-deep);
}

.footer-bottom-inner {
  width: 100%;
  padding: 14px var(--layout-gutter);
  text-align: center;
}

.footer-copyright {
  font-size: 13px;
  color: var(--color-footer-copyright);
  letter-spacing: 0.02em;
}

.footer-copyright a {
  color: inherit;
  transition: color var(--transition-fast);
}

.footer-copyright a:hover {
  color: var(--color-footer-text-hover);
}

/* ---------- 响应式适配 ---------- */
@media (max-width: 900px) {
  .nav-link {
    padding: 7px 12px;
    font-size: 14px;
  }

  .nav-contact-btn {
    padding: 9px 16px;
    font-size: 14px;
  }

  .footer-top-inner {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    gap: 28px;
    padding: 36px var(--layout-gutter) 24px;
  }

  .footer-brand,
  .footer-nav,
  .footer-contact-block,
  .footer-address-block,
  .footer-contact-btn {
    grid-column: 1;
    grid-row: auto;
  }

  .footer-contact-btn {
    justify-self: start;
  }

  .footer-bottom-inner {
    padding: 12px var(--layout-gutter);
  }

  .home-section {
    padding: var(--section-pad-y) 0;
  }

  .section-header--row {
    flex-direction: column;
    align-items: flex-start;
  }

  #about {
    padding: 56px 0;
  }

  #about .section-header {
    margin-bottom: 28px;
  }

  .about-content {
    column-count: 1;
  }

  .about-scroll {
    max-height: 240px;
  }

  .about-content p {
    font-size: 1.0625rem;
    text-align: left;
  }

  .product-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--fluid-gap-md);
  }

  .products-body {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .category-card {
    position: static;
  }

  .product-detail__body {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .product-detail__info {
    min-height: auto !important;
  }

  .detail-block {
    padding: 16px 0;
  }

  .detail-spec-list--two-col {
    grid-template-columns: 1fr;
  }

  .about-page-header {
    padding: 40px 0 8px;
  }

  .about-module {
    padding: 48px 0;
  }

  .about-split,
  .about-split--reverse .about-split__media,
  .about-split--reverse .about-split__content {
    grid-template-columns: 1fr;
    order: unset;
    gap: 32px;
  }

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

  .about-split--profile .about-split__media {
    width: 100%;
  }

  .about-profile-scroll {
    height: auto !important;
    max-height: none;
    overflow: visible;
    padding-left: 0;
  }

  .cert-carousel {
    gap: 10px;
  }

  .cert-arrow {
    width: 32px;
    height: 32px;
  }

  .prod-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--fluid-gap-md);
    margin-bottom: 1.5rem;
  }

  .qc-cards {
    grid-template-columns: 1fr;
    gap: 14px;
  }

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

  .service-list {
    min-height: 0;
  }

  .service-item {
    flex: none;
    padding-bottom: 20px;
    margin-bottom: 20px;
  }

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

  .contact-map,
  .contact-side {
    min-height: 0;
  }

  .contact-card {
    padding: 24px 20px;
  }

  .contact-card::after {
    display: none;
  }

  .contact-card__body {
    flex: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
  }

  .contact-field__box {
    flex: none;
  }

  .category-tabs {
    flex-direction: row;
  }

  .category-tabs .btn {
    width: auto;
    flex: 1;
  }

  .products-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .app-arrow--prev { left: 4px; }
  .app-arrow--next { right: 4px; }

  .hero-arrow--prev { left: 12px; }
  .hero-arrow--next { right: 12px; }
}

@media (max-width: 640px) {
  .product-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .products-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 480px) {
  .product-grid {
    grid-template-columns: 1fr;
  }

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

  .prod-steps {
    grid-template-columns: 1fr;
  }
}

/* 窗口变窄时缩小模块尺度（使用 rem，仍随浏览器缩放） */
@media (max-width: 1200px) {
  :root {
    --hero-height-cap: 43.75rem;
    --section-pad-y: 3rem;
    --fluid-gap-xl: 1.75rem;
  }
}

@media (max-width: 900px) {
  :root {
    --hero-height-cap: 37.5rem;
    --section-pad-y: 2.5rem;
    --layout-gutter: 1.25rem;
    --font-section-title: 1.5rem;
    --fluid-gap-lg: 1rem;
  }

  .products-body {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  :root {
    --section-pad-y: 2rem;
    --fluid-gap-md: 0.75rem;
  }
}