/* ===========================================================
   日新恒通电气 — 官网样式
   设计稿 1920px，响应式自适应
   =========================================================== */

:root {
  /* 品牌色 */
  --blue: #1E50E6;        /* 主品牌蓝 */
  --blue-deep: #1F4DD2;   /* 深品牌蓝 */
  --blue-night: #021EB4;  /* 极深蓝 */
  --blue-bright: #1FA5E5; /* 亮蓝 */
  --red: #D40000;         /* 强调红 */

  /* 中性色 */
  --ink: #333333;         /* 正文深灰 */
  --grey: #9E9E9E;        /* 次要文字 */
  --grey-line: #999999;   /* 分割线 */
  --grey-bg: #F8F8F8;     /* 浅底 */
  --white: #FFFFFF;

  /* 字体 */
  --font-sans: "Source Han Sans CN", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-gothic: "Sarasa Gothic SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;

  /* 容器 */
  --max-w: 1920px;
  --gutter: clamp(20px, 5vw, 96px);
  --header-h: 132px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--white);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; height: auto; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
li { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ============ 顶部导航 ============ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: transparent;            /* 初始透明，压在首屏上 */
  transition: background 0.4s ease, box-shadow 0.4s ease;
}
/* 滚动一屏后：白底黑字 */
.site-header.scrolled {
  background: var(--white);
  box-shadow: 0 2px 16px rgba(0,0,0,0.08);
}
.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
  height: var(--header-h);




  display: flex;
  align-items: center;
  gap: 40px;
}

/* Logo 区 —— 上蓝下亮蓝两块堆叠，始终不变 */
.brand {
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  width: 187px;
}
.brand-top {
  height: 100px;
  background: var(--blue);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 18px;
}
.brand-logo {
  width: 51px; height: 44px;
  object-fit: contain;
  flex-shrink: 0;
}
.brand-name {
  color: var(--white);
  font-size: 25px;
  font-weight: 700;
  line-height: 1.2;
  white-space: nowrap;
}
.brand-bottom {
  height: 32px;
  background: var(--blue-bright);
  display: flex;
  align-items: center;
  padding: 0 13px;
}
.brand-slogan {
  color: var(--white);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.4;
  white-space: nowrap;
}

/* 主导航 —— 文字默认白，滚动后黑 */
.main-nav {
  display: flex;
  align-items: center;
  gap: 36px;
  margin-left: auto;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  color: var(--white);
  font-size: 17px;
  font-weight: 400;
  white-space: nowrap;
  transition: color 0.4s ease, opacity 0.2s;
  position: relative;
  padding: 4px 0;
}

.nav-link:hover { opacity: 0.75; }
.nav-link.active { opacity: 1; font-weight: 700; }
.nav-link.active::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -8px;
  height: 3px;
  background: var(--blue-bright);
  border-radius: 2px;
}
/* 下拉触发器不适用普通 active 下划线（改用 border-bottom） */
.dropdown-trigger.active::after {
  display: none;
}
.site-header.scrolled .nav-link { color: var(--ink); }

/* 下拉菜单 —— 桌面端 */
.nav-dropdown {
  position: relative;
  display: flex;
  align-items: center;
}
.dropdown-trigger {
  cursor: pointer;
}
.dropdown-trigger::after {
  content: '';
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 5px solid currentColor;
  margin-left: 6px;
  vertical-align: middle;
  transition: transform 0.3s ease;
  flex-shrink: 0;
}
.nav-dropdown:hover .dropdown-trigger::after { transform: rotate(180deg); }

/* active 下划线适配 */
.nav-dropdown .dropdown-trigger.active { font-weight: 700; }
/* 下拉触发器的 active 下划线（用 border-bottom 避免与三角箭头 ::after 冲突） */
.dropdown-trigger.active {
  border-bottom: 3px solid var(--blue-bright);
  padding-bottom: 11px;
}

.dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 2px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 180px;
  background: var(--white);
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
  border-radius: 8px;
  overflow: hidden;
  z-index: 110;
  padding: 6px 0;
}
.dropdown-menu::before {
  content: '';
  position: absolute;
  top: -12px;
  left: 0; right: 0;
  height: 14px;
}
/* 桌面端 hover 显示 + JS 控制 class 兜底 */
@media (min-width: 981px) {
  .nav-dropdown:hover .dropdown-menu,
  .nav-dropdown.show .dropdown-menu { display: block; }
}

.dropdown-menu a {
  display: block;
  padding: 12px 24px;
  color: var(--ink);
  font-size: 15px;
  transition: background 0.2s, color 0.2s;
  white-space: nowrap;
}
.dropdown-menu a:hover { background: rgba(31,77,210,0.06); color: var(--blue-deep); }

/* 右侧附属 */
.header-aside {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}
.aside-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 5px;
  color: var(--white);
  font-size: 18px;
  transition: color 0.4s ease;
}
.site-header.scrolled .aside-item { color: var(--ink); }
.aside-icon { width: 20px; height: 20px; transition: filter 0.4s ease; }
.site-header.scrolled .aside-icon { filter: brightness(0); }
.aside-divider {
  width: 2px; height: 29px;
  background: rgba(255,255,255,0.35);
  transition: background 0.4s ease;
}
.site-header.scrolled .aside-divider { background: rgba(0,0,0,0.15); }
.aside-phone { font-weight: 900; }

/* 公众号二维码弹出 */
.has-qr { cursor: pointer; }
.qr-popup {
  position: absolute;
  top: calc(100% + 14px);
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  background: var(--white);
  padding: 14px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.18);
  text-align: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
  z-index: 120;
  border-radius: 4px;
}
.qr-popup::before {
  content: '';
  position: absolute;
  top: -6px; left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 12px; height: 12px;
  background: var(--white);
}
.qr-popup img {
  width: 150px; height: 150px;
  display: block;
}
.qr-popup p {
  margin-top: 10px;
  font-size: 14px;
  color: var(--ink);
  white-space: nowrap;
}
.has-qr:hover .qr-popup {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  margin-left: auto;
  flex-shrink: 0;
}
.nav-toggle span {
  display: block;
  width: 26px; height: 3px;
  background: var(--white);
  border-radius: 2px;
  transition: all 0.3s;
}
.site-header.scrolled .nav-toggle span { background: var(--ink); }

/* ============ Hero ============ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  max-height: 1080px;
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; overflow: hidden; }
.hero-track {
  display: flex;
  width: 100%;
  height: 100%;
  transition: transform 0.8s ease;
  will-change: transform;
}
.hero-slide { flex: 0 0 100%; width: 100%; height: 100%; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-overlay {
  position: absolute; inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, rgba(2,30,180,0.25) 0%, rgba(0,0,0,0.1) 60%, rgba(0,0,0,0.3) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.hero-title {
  color: var(--white);
  font-size: clamp(36px, 5vw, 68px);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: 1px;
  max-width: 720px;
}
.hero-scroll {
  position: absolute;
  right: 0;
  bottom: 8%;
  z-index: 3;
}
.scroll-box {
  border-radius: 10px 0 0 10px;
  width: 90px;
  height: 155px;
  background: linear-gradient(155deg, #1FA5E5 0%, #1E50E6 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 23px 14px 22px;
}
.scroll-arrow-big { width: 42px; height: 34px; }
/* 悬停大箭头：电话号码从左侧浮现 */
.scroll-arrow-wrap { position: relative; display: block; line-height: 0; }
.scroll-phone {
  position: absolute;
  right: 100%;
  top: 50%;
  transform: translateY(-50%) translateX(8px);
  margin-right: 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  background: linear-gradient(135deg, #1FA5E5 0%, #1E50E6 100%);
  color: var(--white);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.5px;
  padding: 10px 18px;
  border-radius: 999px;
  box-shadow: 0 10px 28px rgba(30, 80, 230, 0.35);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
}
/* 电话图标*/
.scroll-phone::before {
  content: "";
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  background-color: var(--white);
  -webkit-mask: url("data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%2024%2024'%3E%3Cpath%20d='M6.6%2010.8c1.4%202.8%203.8%205.1%206.6%206.6l2.2-2.2c.3-.3.7-.4%201-.2%201.1.4%202.3.6%203.5.6.6%200%201%20.4%201%201V20c0%20.6-.4%201-1%201C10.6%2021%203%2013.4%203%204c0-.6.4-1%201-1h3.4c.6%200%201%20.4%201%201%200%201.2.2%202.4.6%203.5.1.4%200%20.8-.2%201l-2.2%202.3z'/%3E%3C/svg%3E") center / contain no-repeat;
          mask: url("data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%2024%2024'%3E%3Cpath%20d='M6.6%2010.8c1.4%202.8%203.8%205.1%206.6%206.6l2.2-2.2c.3-.3.7-.4%201-.2%201.1.4%202.3.6%203.5.6.6%200%201%20.4%201%201V20c0%20.6-.4%201-1%201C10.6%2021%203%2013.4%203%204c0-.6.4-1%201-1h3.4c.6%200%201%20.4%201%201%200%201.2.2%202.4.6%203.5.1.4%200%20.8-.2%201l-2.2%202.3z'/%3E%3C/svg%3E") center / contain no-repeat;
}
/* 指向右侧箭头的三角小尾巴 */
.scroll-phone::after {
  content: "";
  position: absolute;
  left: 100%;
  top: 50%;
  transform: translateY(-50%);
  border: 7px solid transparent;
  border-left-color: #1E50E6;
}
.scroll-arrow-wrap:hover .scroll-phone {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}
.scroll-line { display: block; width: 62px; height: 2px; background: var(--white); }
.scroll-arrow-small { width: 33px; height: 34px; }

/* Hero 指示器：当前蓝，其余白 */
.hero-indicators {
  position: absolute;
  left: 50%;
  bottom: 4%;
  transform: translateX(-50%);
  display: flex;
  gap: 13px;
  z-index: 3;
}
.indicator {
  width: 58px; height: 6px;
  background: rgba(255,255,255,0.7);
  cursor: pointer;
  transition: background 0.3s;
}
.indicator.active { background: var(--blue); }

/* ============ 通用标题 ============ */
.section-title {
  display: flex;
  align-items: center;
  gap: 27px;
}
.title-bar { width: 10px; height: 78px; background: var(--blue); }
.section-title h2 {
  font-size: clamp(32px, 3.2vw, 50px);
  font-weight: 700;
  color: var(--blue-deep);
}
.section-title.light h2 { color: var(--white); }
.section-title.light .title-bar { background: var(--white); }

/* ============ 关于我们（背景图 + 文字浮层） ============ */
.about {
  position: relative;
  padding: 90px var(--gutter) 90px;
  max-width: var(--max-w);
  margin: 0 auto;
  overflow: hidden;
}
.about-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.about-bg img { width: 100%; height: 100%; object-fit: cover; }
.about-mask {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(100deg,
    rgba(255,255,255,0.97) 0%,
    rgba(255,255,255,0.93) 38%,
    rgba(255,255,255,0.72) 68%,
    rgba(255,255,255,0.48) 100%);
}
.about-content {
  position: relative;
  z-index: 2;
}
.about-text { position: relative; }
.about-tag {
  display: inline-block;
  margin-bottom: 24px;
  padding: 6px 18px;
  background: var(--blue);
  color: var(--white);
  font-family: var(--font-gothic);
  font-size: 20px;
  border-radius: 0 0 0 0;
}
.about-heading {
  font-size: clamp(28px, 3vw, 48px);
  font-weight: 400;
  color: var(--ink);
  line-height: 1.35;
}
.about-en {
  margin-top: 16px;
  color: var(--grey);
  font-family: var(--font-gothic);
  font-size: 18px;
}
.about-desc {
  margin-top: 30px;
  max-width: 771px;
  font-family: var(--font-gothic);
  font-size: 18px;
  line-height: 39px;
  color: var(--ink);
}

/* 数据卡 —— 左上角圆角 */
.stats {
  margin-top: 60px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}
.stat-card {
  position: relative;
  padding: 41px 30px 30px;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(30, 80, 230, 0.12);
  border-radius: 80px 0 0 0;            /* 左上大圆弧 */
  min-height: 300px;
  overflow: hidden;
  box-shadow: 0 6px 24px rgba(2, 30, 180, 0.10);
  display: flex;
  flex-direction: column;
  align-items: center;                  /* 内部元素水平居中 */
}
.stat-arrow {
  position: absolute;
  top: 49px; right: 40px;
  width: 38px; height: 38px;
}
.stat-arrow img { width: 100%; height: 100%; }
.stat-num {
  display: block;
  margin-top: 41px;
  font-size: clamp(70px, 6vw, 110px);
  font-weight: 900;
  color: var(--blue-night);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  text-align: center;
}
.stat-label {
  display: block;
  margin-top: auto;
  padding-top: 23px;
  font-size: 18px;
  color: var(--ink);
  line-height: 1.5;
  text-align: center;
}

/* ============ 理念 Banner（蓝块左置 + 图片右下溢出） ============ */
.banner {
  position: relative;
  width: 100%;
  /* 容器高度容纳图片底部：top 5.7vw + height 31.6vw = 37.3vw */
  min-height: 37.3vw;
  overflow: visible;
}
.banner-blue {
  position: absolute;
  left: 0;
  top: 0;
  width: 59.7%;            /* 蓝块占约 60% */
  height: 26.6vw;
  max-height: 510px;
  min-height: 260px;
  background: var(--blue);
  padding: 80px clamp(40px, 8vw, 158px);
  display: flex;
  align-items: center;
  z-index: 1;
}
.banner-slogan {
  color: var(--white);
  font-size: clamp(32px, 3.3vw, 64px);
  font-weight: 900;
  line-height: 1.45;
}
.banner-figure {
  position: absolute;
  right: 0;
  top: 5.7vw;              /* 图片比蓝块顶部下移 */
  width: 64.8%;            /* 图片占约 65% */
  height: 31.6vw;
  max-height: 606px;
  min-height: 300px;
  overflow: hidden;
  z-index: 2;
}
.banner-figure img {
  width: 100%; height: 100%;
  object-fit: cover;
}

/* ============ 产品中心 ============ */
.products {
  padding: 80px var(--gutter) 100px;
  max-width: var(--max-w);
  margin: 60px auto 0;
}
.product-tabs {
  display: flex;
  justify-content: center;
  gap: 60px;
  margin: 50px 0 50px;
}
.tab {
  padding: 18px 0;
  width: 366px;
  height: 65px;
  font-size: 26px;
  font-weight: 500;
  color: var(--ink);
  background: var(--grey-bg);
  text-align: center;
  transition: 0.3s;
}
.tab.active { background: var(--blue-deep); color: var(--white); }
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1707px;
  margin: 0 auto;
}
.product-card {
  background: var(--white);
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}
.product-img {
  position: relative;
  width: 100%;
  height: 571px;
  overflow: hidden;
  background: var(--grey-bg);
}
.product-img img { width: 100%; height: 100%; object-fit: contain; }
.product-mask {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(31,77,210,0.00) 60%, #1F4DD2 100%);
  opacity: 0;
  transition: opacity 0.4s;
}
.product-card:hover .product-mask { opacity: 1; }
.product-name {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 20px;
  font-size: 20px;
  color: var(--white);
  text-align: center;
  font-weight: 500;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.4s, transform 0.4s;
}
.product-card:hover .product-name {
  opacity: 1;
  transform: translateY(0);
}

/* ============ 行业应用 ============ */
.industry {
  position: relative;
  /* 高度 = 一屏减去导航栏高度，正好填满 header 以下区域 */
  height: max(480px, calc(100vh - var(--header-h)));
  /* 往下推一个导航栏高度，避免被 fixed 的 header 遮挡 */
  margin-top: var(--header-h);
  /* 锚点跳转时同样避开固定导航 */
  scroll-margin-top: var(--header-h);
  overflow: hidden;
}
.industry-bg { position: absolute; inset: 0; z-index: 0; }
.industry-bg img { width: 100%; height: 100%; object-fit: cover; transition: opacity 0.5s ease; }
.industry-overlay {
  position: absolute; inset: 0;
  z-index: 1;
  background: rgba(2, 30, 180, 0.4);
}
.industry-lines {
  position: absolute; inset: 0;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
}
.industry-lines span {
  border-right: 1px solid rgba(255,255,255,0.2);
  cursor: pointer;
  transition: background 0.3s ease;
}
.industry-lines span:last-child { border-right: none; }
.industry-lines span:hover { background: rgba(255,255,255,0.08); }

.industry-panel {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 20%;
  --panel-w: 20;
  background: linear-gradient(180deg, #1f4dd200 21%, #1f4dd2 100%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  padding: clamp(40px, 4vw, 80px) clamp(20px, 3vw, 50px);
  transition: left 0.5s ease;
  left: 0;
}
.panel-marker {
  display: block;
  width: 6px;
  height: 40px;
  background: var(--white);
  margin-bottom: 24px;
}
.panel-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  transition: opacity 0.3s ease;
}
.panel-title {
  color: var(--white);
  font-size: clamp(24px, 2.8vw, 42px);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 12px;
}
.panel-subtitle {
  color: rgba(255,255,255,0.8);
  font-size: clamp(14px, 1.2vw, 18px);
  font-weight: 500;
  margin-bottom: 30px;
}
.panel-desc {
  color: rgba(255,255,255,0.9);
  font-size: clamp(13px, 1.1vw, 16px);
  line-height: 1.8;
  flex: 1;
}
.panel-btn {
  margin-top: 30px;
  padding: 12px 30px;
  background: var(--white);
  color: var(--blue-deep);
  font-size: clamp(14px, 1.2vw, 16px);
  font-weight: 600;
  border-radius: 4px;
  transition: all 0.3s ease;
  align-self: center;
}
.panel-btn:hover {
  background: rgba(255,255,255,0.9);
  transform: translateY(-2px);
}

.industry-nav {
  position: absolute;
  left: 0; right: 0;
  bottom: 6%;
  z-index: 4;
  display: flex;
  justify-content: space-around;
  padding: 0 var(--gutter);
}
.industry-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  transition: all 0.3s ease;
  padding: 8px 12px;
  background: none;
  border: none;
  opacity: 1;
}
.item-icon-wrap {
  width: clamp(60px, 5vw, 80px);
  height: clamp(60px, 5vw, 80px);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  transition: all 0.3s ease;
  position: relative;
}
.item-icon-wrap::before {
  content: '';
  position: absolute;
  inset: -4px;
  background: rgba(255,255,255,0.1);
  border-radius: 12px;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.industry-item img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: brightness(0.7);
  transition: filter 0.3s ease;
  z-index: 1;
}
.item-label {
  color: rgba(255,255,255,0.7);
  font-size: clamp(13px, 1.1vw, 16px);
  font-weight: 400;
  transition: color 0.3s ease;
  position: relative;
}
.item-label::after {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: -8px;
  width: 0;
  height: 3px;
  background: var(--blue-bright);
  transition: width 0.3s ease;
}

.industry-item:hover .item-icon-wrap {
  background: rgba(255,255,255,0.15);
}
.industry-item:hover .item-icon-wrap::before {
  opacity: 1;
}
.industry-item:hover img {
  filter: brightness(1);
}
.industry-item:hover .item-label {
  color: var(--white);
}

.industry-item.active .item-icon-wrap {
  background: linear-gradient(180deg, rgba(31, 77, 210, 0.00) 0%, #1F4DD2 100%);
}
.industry-item.active .item-icon-wrap::before {
  opacity: 1;
}
.industry-item.active img {
  filter: brightness(1);
}
.industry-item.active .item-label {
  color: var(--white);
  font-weight: 600;
}
.industry-item.active .item-label::after {
  width: 100%;
}

/* ============ 新闻中心 ============ */
.news {
  padding: 80px var(--gutter) 60px;
  max-width: var(--max-w);
  margin: 0 auto;
}
.news-layout {
  margin-top: 50px;
  display: grid;
  grid-template-columns: 0.85fr 1fr;
  gap: 60px;
}
.news-feature img { width: 100%; object-fit: cover; }
.news-feature-title {
  margin-top: 24px;
  font-size: clamp(22px, 1.8vw, 30px);
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
}
.news-feature-summary {
  margin-top: 16px;
  font-size: 16px;
  color: var(--grey-line);
  line-height: 1.9;
}
.news-list { display: flex; flex-direction: column; }
.news-item {
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 28px 0;
  border-top: 1px solid var(--grey-line);
}
.news-item:last-child { border-bottom: 1px solid var(--grey-line); }
.news-date { flex-shrink: 0; width: 98px; }
.date-md { display: block; font-size: 28px; color: var(--ink); line-height: 1; }
.date-yr { display: block; margin-top: 6px; font-size: 18px; color: var(--grey); }
.news-item-title {
  font-size: clamp(16px, 1.2vw, 22px);
  color: var(--ink);
  line-height: 1.5;
}

/* ============ Footer ============ */
.footer { background: var(--white); }
.footer-top {
  padding: 40px var(--gutter) 30px;
  max-width: var(--max-w);
  margin: 0 auto;
    border-top: 1px solid rgba(0,0,0,0.1);
}
.friend-links {
	padding: 40px var(--gutter) 30px;
	max-width: var(--max-w);
	margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 60px;
  padding-bottom: 30px;

}
.friend-links a {
  font-family: var(--font-gothic);
  font-size: 16px;
  color: var(--grey);
  transition: color 0.2s;
}
.friend-links a:hover { color: var(--blue-deep); }
.footer-main {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 60px;
  padding: 40px 0;
  align-items: start;
}
.footer-brand { display: flex; align-items: center; gap: 17px; }
.footer-logo { width: 78px; height: 67px; object-fit: contain; }
.footer-name {
  font-family: var(--font-gothic);
  font-size: clamp(28px, 2.4vw, 38px);
  font-weight: 700;
  color: var(--ink);
}
.footer-cols { display: flex; justify-content: flex-end; gap: 180px; }
.footer-col h4 {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-gothic);
  font-size: 26px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 14px;
}
.col-bar { width: 5px; height: 31px; background: var(--blue-bright); }
.footer-col p {
  font-family: var(--font-gothic);
  font-size: 22px;
  color: var(--grey);
  line-height: 1.95;
}
.footer-copy { background:#1F4DD2; }
.copy-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 30px var(--gutter);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 40px;
}
.copy-text p {
  color: var(--white);
  font-family: var(--font-gothic);
  font-size: 22px;
  line-height: 1.95;
}
.copy-brand { display: flex; align-items: center; gap: 15px; flex-shrink: 0; }
.copy-brand img { width: 74px; height: 64px; object-fit: contain; }
.copy-brand span {
  color: var(--white);
  font-size: clamp(24px, 2vw, 36px);
  font-weight: 700;
}

/* ============ 回到顶部 ============ */
.back-top {
  position: fixed;
  right: 30px; bottom: 30px;
  width: 50px; height: 60px;
  background: var(--blue);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: 0.3s;
  z-index: 90;
}
.back-top.show { opacity: 1; visibility: visible; }
.back-top:hover { background: var(--blue-deep); }
.back-top img { width: 24px; height: 28px; }

/* ============ 滚动渐入 ============ */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
  will-change: opacity, transform;
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ===========================================================
   子页面通用样式
   =========================================================== */
.page-header {
  position: relative;
  height: clamp(200px, 25vw, 300px);
  overflow: hidden;
  margin-top: var(--header-h);
}
.page-bg { position: absolute; inset: 0; }
.page-bg img { width: 100%; height: 100%; object-fit: cover; }
.page-overlay {
  position: absolute; inset: 0;
  background: rgba(2, 30, 180, 0.6);
}
.page-content {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 var(--gutter);
}
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.8);
  font-size: clamp(14px, 1.2vw, 16px);
  margin-bottom: 16px;
}
.breadcrumbs a { color: rgba(255,255,255,0.8); }
.breadcrumbs a:hover { color: var(--white); }
.crumb-sep { opacity: 0.5; }
.crumb-current { color: var(--white); }
.page-title {
  color: var(--white);
  font-size: clamp(28px, 3vw, 42px);
  font-weight: 700;
}

.page-main {
  padding: 60px 0;
}
.section-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ============ 关于我们页面 ============ */
.about-section { padding: 60px 0; }
.about-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-bottom: 60px;
  align-items: center;
}
.about-card.reverse { direction: rtl; }
.about-card.reverse .about-card-text { direction: ltr; }
.about-card-img { overflow: hidden; border-radius: 8px; }
.about-card-img img { width: 100%; height: 400px; object-fit: cover; }
.about-card-text { padding: 20px; }
.about-card-text .about-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--blue-bright);
  color: var(--white);
  font-size: 12px;
  border-radius: 4px;
  margin-bottom: 16px;
}
.about-card-text .about-heading {
  font-size: clamp(24px, 2vw, 32px);
  color: var(--ink);
  margin-bottom: 20px;
}
.about-card-text .about-desc {
  color: var(--grey);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 16px;
}
.read-more {
  display: inline-flex;
  align-items: center;
  color: var(--blue-deep);
  font-weight: 600;
  font-size: 15px;
  margin-top: 10px;
}
.read-more::after {
  content: '';
  width: 20px;
  height: 2px;
  background: var(--blue-deep);
  margin-left: 10px;
  transition: width 0.3s;
}
.read-more:hover::after { width: 30px; }

.features-section {
  padding: 60px 0;
  background: rgba(31,77,210,0.05);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  margin-top: 40px;
}
.feature-card {
  background: var(--white);
  padding: 30px;
  border-radius: 8px;
  text-align: center;
  transition: transform 0.3s;
}
.feature-card:hover { transform: translateY(-5px); }
.feature-card .feature-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--blue-deep), var(--blue-bright));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(31,77,210,0.25);
  transition: transform 0.3s ease;
}
.feature-card:hover .feature-icon { transform: scale(1.1); }
.feature-card .feature-icon img {
  width: 28px;
  height: 28px;
  filter: brightness(0) invert(1);
}
.feature-title {
  font-size: 18px;
  color: var(--ink);
  margin-bottom: 12px;
}
.feature-desc {
  font-size: 14px;
  color: var(--grey);
  line-height: 1.6;
}

/* ============ 公司简介页面 ============ */
.company-section { padding: 60px 0; }
.company-hero {
  position: relative;
  height: clamp(280px, 45vw, 300px);
  overflow: hidden;
  margin-bottom: 50px;
}
.company-hero img { width: 100%; height: 100%; object-fit: cover; }
.company-hero-mask {
  position: absolute; inset: 0;
  background: linear-gradient(to right, rgba(31,77,210,0.8) 0%, rgba(31,77,210,0) 100%);
}
.company-hero-text {
  position: absolute;
  left: var(--gutter);
  bottom: 80px;
  color: var(--white);
}
.company-hero-text h2 {
  font-size: clamp(34px, 3.5vw, 52px);
  margin-bottom: 15px;
}
.company-hero-text p { 
  font-size: 18px;
  opacity: 0.8; 
}

.company-stats {
  display: flex;
  justify-content: center;
  gap: 100px;
  margin-bottom: 80px;
  padding: 50px 0;
  border-top: 1px solid rgba(0,0,0,0.05);
  border-bottom: 1px solid rgba(0,0,0,0.05);
}
.company-stat { text-align: center; }
.company-stat .stat-num {
  display: block;
  font-size: clamp(40px, 5vw, 60px);
  font-weight: 700;
  color: var(--blue-deep);
}
.company-stat .stat-label {
  display: block;
  font-size: 16px;
  color: var(--grey);
  margin-top: 10px;
}

.company-content { max-width: 1200px; margin: 0 auto; }
.content-title {
  font-size: 28px;
  color: var(--ink);
  margin-bottom: 25px;
  padding-left: 14px;
  border-left: 5px solid var(--blue-deep);
}
.content-text {
  font-size: 18px;
  color: var(--grey);
  line-height: 2;
  margin-bottom: 25px;
}

.timeline {
  position: relative;
  margin-bottom: 50px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 75px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: rgba(31,77,210,0.2);
}
.timeline-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: 45px;
  position: relative;
}
.timeline-year {
  flex-shrink: 0;
  width: 70px;
  text-align: right;
  font-size: 24px;
  font-weight: 700;
  color: var(--blue-deep);
  margin-right: 18px;
}
.timeline-dot {
  flex-shrink: 0;
  width: 14px;
  height: 14px;
  background: var(--blue-deep);
  border-radius: 50%;
  border: 3px solid var(--white);
  box-shadow: 0 0 0 3px rgba(31,77,210,0.2);
  margin-right: 20px;
  margin-top: 8px;
}
.timeline-text {
  flex: 1;
  font-size: 18px;
  color: var(--grey);
  line-height: 1.6;
  margin-top: 4px;
}

.product-categories { padding: 30px 0; }
.page-main .product-tabs {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin: 0 0 30px;
}
.product-tab {
  padding: 12px 30px;
  background: transparent;
  border: 2px solid rgba(31,77,210,0.2);
  border-radius: 30px;
  color: var(--ink);
  font-size: 16px;
  cursor: pointer;
  transition: all 0.3s;
}
.product-tab:hover { border-color: var(--blue-deep); }
.product-tab.active {
  background: var(--blue-deep);
  border-color: var(--blue-deep);
  color: var(--white);
}

.product-list-section { padding: 40px 0; }
.product-list-section .product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}
.product-list-section .product-card {
  background: var(--white);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
  transition: transform 0.3s, box-shadow 0.3s;
  position: static;
}
.product-list-section .product-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.12);
}
.product-list-section .product-img {
  height: max(220px, calc(100vw /5));
  overflow: hidden;
  position: relative;
  aspect-ratio: 1 / 1;
}

.product-list-section .product-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}
.product-list-section .product-card:hover .product-img img { transform: scale(1.08); }
.product-list-section .product-mask { display: none; }
.product-list-section .product-info {
  padding: 20px;
}
.product-list-section .product-name {
  position: static;
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
  line-height: 1.4;
  opacity: 1;
  transform: none;
  padding: 0;
}
.product-list-section .product-desc {
  font-size: 13px;
  color: var(--grey);
  line-height: 1.6;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.product-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(31,77,210,0.08);
  color: var(--blue-deep);
  font-size: 12px;
  border-radius: 12px;
}

.product-features { padding: 60px 0; background: var(--grey-bg); }
.product-features .features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}
.feature-item {
  text-align: center;
  padding: 30px;
}
.feature-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--blue-deep), var(--blue-bright));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(31,77,210,0.25);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.feature-item:hover .feature-icon {
  transform: scale(1.1);
  box-shadow: 0 6px 22px rgba(31,77,210,0.4);
}
.feature-icon img {
  width: 28px;
  height: 28px;
  filter: brightness(0) invert(1);
}
.feature-item h3 {
  font-size: 18px;
  color: var(--ink);
  margin-bottom: 10px;
}
.feature-item p {
  font-size: 14px;
  color: var(--grey);
  line-height: 1.6;
}

.honors-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}
.honor-item {
  text-align: center;
  padding: 28px;
  background: rgba(31,77,210,0.05);
  border-radius: 10px;
}
.honor-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 6px;
  margin-bottom: 16px;
}
.honor-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
}

/* ============ 资质展示页面 ============ */
.qualifications-section { padding: 60px 0; }
.qual-tabs {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 40px;
}
.qual-tab {
  padding: 12px 30px;
  background: transparent;
  border: 1px solid rgba(0,0,0,0.1);
  color: var(--grey);
  font-size: 16px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.3s;
}
.qual-tab.active {
  background: var(--blue-deep);
  border-color: var(--blue-deep);
  color: var(--white);
}
.qual-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}
.qual-card {
  background: var(--white);
  border: 1px solid rgba(0,0,0,0.05);
  border-radius: 8px;
  overflow: hidden;
  transition: box-shadow 0.3s;
}
.qual-card:hover { box-shadow: 0 10px 30px rgba(0,0,0,0.1); }
.qual-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}
.qual-card h3 {
  padding: 20px 20px 10px;
  font-size: 18px;
  color: var(--ink);
}
.qual-card p {
  padding: 0 20px 20px;
  font-size: 14px;
  color: var(--grey);
}

.cert-intro {
  padding: 40px 0;
  background: rgba(31,77,210,0.05);
}
.cert-text {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}
.cert-text h3 {
  font-size: 22px;
  color: var(--ink);
  margin-bottom: 20px;
}
.cert-text p {
  font-size: 15px;
  color: var(--grey);
  line-height: 1.8;
  margin-bottom: 10px;
}

/* ============ 新闻资讯页面 ============ */
.news-section { padding: 10px 0; }
.news-section .section-inner {
  display: block;
}
.news-main {
  max-width: 100%;
}

/* 新闻详情侧边栏 */
.news-sidebar { flex-shrink: 0; }
.hot-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 20px;
  padding-left: 14px;
  border-left: 4px solid var(--blue-deep);
}
.news-hot { margin-top: 0; }
.hot-list { list-style: none; }
.hot-item {
  display: flex;
  gap: 12px;
  padding: 10px 0;
  align-items: center;
}
.hot-num {
  width: 24px;
  height: 24px;
  background: rgba(31,77,210,0.1);
  color: var(--blue-deep);
  font-size: 12px;
  font-weight: 600;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hot-text {
  font-size: 14px;
  color: var(--grey);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.news-article {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 30px;
  padding: 30px 0;
  border-bottom: 1px solid rgba(0,0,0,0.05);
  align-items: center;
}
.article-img { overflow: hidden; border-radius: 8px; }
.article-img img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}
.article-cat {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(31,77,210,0.1);
  color: var(--blue-deep);
  font-size: 12px;
  border-radius: 4px;
  margin-bottom: 12px;
}
.article-title {
  font-size: 20px;
  color: var(--ink);
  margin-bottom: 12px;
  line-height: 1.4;
}
.article-summary {
  font-size: 15px;
  color: var(--grey);
  line-height: 1.7;
  margin-bottom: 16px;
}
.article-meta {
  display: flex;
  gap: 20px;
  font-size: 14px;
  color: rgba(0,0,0,0.4);
}

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  margin-top: 40px;
}
.page-item a,.page-item span {
  padding: 8px 20px;
  background: transparent;
  border: 1px solid rgba(0,0,0,0.1);
  color: var(--grey);
  font-size: 14px;
  border-radius: 4px;
}
.page-item a:hover {
  background: var(--blue-deep);
  border-color: var(--blue-deep);
  color: var(--white);
}
.page-num {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--grey);
  border-radius: 4px;
  cursor: pointer;
}
.page-item.active span{
  background: var(--blue-deep);
  color: var(--white);
}

/* ============ 应用领域页面 ============ */
.industry-page-section { padding: 60px 0; }
.industry-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}
.industry-card {
  position: relative;
  height: 400px;
  overflow: hidden;
  border-radius: 8px;
  cursor: pointer;
}
.industry-card-bg { position: absolute; inset: 0; }
.industry-card-bg img { width: 100%; height: 100%; object-fit: cover; }
.industry-card-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(2,30,180,0.9) 0%, rgba(2,30,180,0) 50%);
}
.industry-card-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 30px;
  color: var(--white);
}
.industry-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  filter: brightness(1);
}
.industry-card-title {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 12px;
}
.industry-card-desc {
  font-size: 14px;
  line-height: 1.6;
  opacity: 0.9;
  margin-bottom: 16px;
}
.industry-card-link {
  display: inline-flex;
  align-items: center;
  color: var(--white);
  font-size: 14px;
  font-weight: 500;
}
.industry-card-link::after {
  content: '';
  width: 20px;
  height: 2px;
  background: var(--white);
  margin-left: 8px;
}

.industry-features {
  padding: 60px 0;
  background: rgba(31,77,210,0.05);
}
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  margin-top: 40px;
}
.solution-card {
  background: var(--white);
  padding: 30px;
  border-radius: 8px;
  text-align: center;
}
.solution-card h3 {
  font-size: 18px;
  color: var(--ink);
  margin-bottom: 12px;
}
.solution-card p {
  font-size: 14px;
  color: var(--grey);
  line-height: 1.6;
}

/* ============ 联系我们页面 ============ */
.contact-section { padding: 60px 0; }
.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.contact-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  padding: 32px 24px;
  background: var(--white);
  border-radius: 12px;
  box-shadow: 0 2px 16px rgba(0,0,0,0.06);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}
.contact-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue-deep), var(--blue-bright));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}
.contact-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(31,77,210,0.15);
}
.contact-card:hover::before { transform: scaleX(1); }

.contact-card-link {
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}
.contact-arrow {
  position: absolute;
  bottom: 20px; right: 24px;
  font-size: 20px;
  color: var(--blue-deep);
  opacity: 0;
  transform: translateX(-8px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.contact-card-link:hover .contact-arrow {
  opacity: 1;
  transform: translateX(0);
}

.contact-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--blue-deep), var(--blue-bright));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.3s ease, transform 0.3s ease;
  box-shadow: 0 4px 12px rgba(31,77,210,0.25);
}
.contact-card:hover .contact-icon {
  transform: scale(1.08);
  box-shadow: 0 6px 20px rgba(31,77,210,0.35);
}
.contact-icon img {
  width: 26px;
  height: 26px;
  filter: brightness(0) invert(1);
}

.contact-text h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
}
.contact-text p {
  font-size: 14px;
  color: var(--grey);
  margin-bottom: 4px;
  line-height: 1.6;
}

/* 地图区域：双栏布局 */
.map-section { padding: 40px 0 60px; }
.map-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.map-title {
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 24px;
  padding-left: 16px;
  border-left: 4px solid var(--blue-deep);
}
.map-container {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

/* 服务信息列表 */
.service-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.service-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background: var(--white);
  border-radius: 10px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.04);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}
.service-item:hover {
  box-shadow: 0 6px 20px rgba(0,0,0,0.08);
  transform: translateX(4px);
}
.service-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--blue-deep), var(--blue-bright));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 3px 10px rgba(31,77,210,0.2);
}
.service-icon img {
  width: 20px;
  height: 20px;
  filter: brightness(0) invert(1);
}
.service-text h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}
.service-text p {
  font-size: 13px;
  color: var(--grey);
  margin-bottom: 2px;
  line-height: 1.6;
}

/* ============ 产品详情页 ============ */
.product-detail { padding: 60px 0; }
.product-detail .section-inner {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
}
.detail-gallery { display: flex; flex-direction: column; gap: 15px; }
.gallery-main {
  width: 100%;
  min-height: 450px;
  overflow: hidden;
  border-radius: 8px;
}
.gallery-main img { width: 100%; height: 100%; object-fit: cover; }
.gallery-thumbs { display: flex; gap: 10px; }
.gallery-thumbs img {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: 4px;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity 0.3s;
}
.gallery-thumbs img:hover, .gallery-thumbs img.active { opacity: 1; }

.detail-title {
  font-size: 22px;
  color: var(--ink);
  margin-bottom: 16px;
  padding-left: 12px;
  border-left: 4px solid var(--blue-deep);
}
.detail-desc {
  font-size: 15px;
  color: var(--grey);
  line-height: 1.8;
  margin-bottom: 30px;
}

.param-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 30px;
}
.param-table th {
  background: rgba(31,77,210,0.05);
  padding: 12px 16px;
  text-align: left;
  font-size: 14px;
  color: var(--ink);
  border-bottom: 1px solid rgba(0,0,0,0.05);
}
.param-table td {
  padding: 12px 16px;
  font-size: 14px;
  color: var(--grey);
  border-bottom: 1px solid rgba(0,0,0,0.05);
}

.feature-list { list-style: none; }
.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px dashed rgba(0,0,0,0.05);
}
.feature-num {
  width: 28px;
  height: 28px;
  background: rgba(31,77,210,0.1);
  color: var(--blue-deep);
  font-size: 12px;
  font-weight: 600;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.detail-contact {
  margin-top: 30px;
  padding: 24px;
  background: rgba(31,77,210,0.05);
  border-radius: 8px;
}
.detail-contact h3 {
  font-size: 18px;
  color: var(--ink);
  margin-bottom: 8px;
}
.detail-contact p {
  font-size: 14px;
  color: var(--grey);
  margin-bottom: 16px;
}
.contact-btn {
  display: inline-block;
  padding: 12px 30px;
  background: var(--blue-deep);
  color: var(--white);
  font-size: 14px;
  font-weight: 600;
  border-radius: 4px;
}

.related-products { padding: 60px 0; background: rgba(31,77,210,0.03); }

/* ============ 新闻详情页 ============ */
.news-detail { padding: 10px 0; }
.news-detail .section-inner {
  display: grid;
  grid-template-columns: 1.2fr 280px;
  gap: 40px;
}
.detail-article { background: var(--white); padding: 40px; border-radius: 8px; }
.article-meta {
  display: flex;
  gap: 20px;
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(0,0,0,0.05);
}
.article-meta span { font-size: 14px; color: rgba(0,0,0,0.5); }
.article-content { font-size: 15px; line-height: 2; color: var(--grey); }
.article-content img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: 20px 0;
}
.article-content h3 {
  font-size: 20px;
  color: var(--ink);
  margin: 30px 0 16px;
}
.article-content p { margin-bottom: 16px; }

.article-tags { margin-top: 30px; padding-top: 20px; border-top: 1px solid rgba(0,0,0,0.05); }
.tags-title { font-size: 14px; color: rgba(0,0,0,0.5); }
.tag {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(31,77,210,0.1);
  color: var(--blue-deep);
  font-size: 13px;
  border-radius: 4px;
  margin-left: 8px;
}

.article-nav {
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid rgba(0,0,0,0.05);
  display: flex;
  justify-content: space-between;
}
.nav-prev, .nav-next {
  font-size: 14px;
  color: var(--grey);
  max-width: 45%;
}

/* ============ 行业详情页 ============ */
.industry-detail { padding: 60px 0; }
.detail-hero {
  position: relative;
  height: 350px;
  overflow: hidden;
  margin-bottom: 40px;
  border-radius: 8px;
}
.detail-hero img { width: 100%; height: 100%; object-fit: cover; }
.detail-hero-text {
  position: absolute;
  left: var(--gutter);
  bottom: 40px;
  color: var(--white);
}
.detail-hero-text h2 { font-size: 28px; margin-bottom: 8px; }
.detail-hero-text p { opacity: 0.9; }

.solution-list { display: flex; flex-direction: column; gap: 20px; margin-bottom: 30px; }
.solution-item {
  display: flex;
  gap: 20px;
  padding: 24px;
  background: rgba(31,77,210,0.03);
  border-radius: 8px;
}
.solution-item img { width: 56px; height: 56px; }
.solution-text h4 { font-size: 18px; color: var(--ink); margin-bottom: 8px; }
.solution-text p { font-size: 14px; color: var(--grey); line-height: 1.6; }

.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 30px;
}
.case-item {
  background: var(--white);
  border-radius: 8px;
  overflow: hidden;
}
.case-item img { width: 100%; height: 180px; object-fit: cover; }
.case-item h4 {
  padding: 20px 20px 10px;
  font-size: 16px;
  color: var(--ink);
}
.case-item p {
  padding: 0 20px 20px;
  font-size: 14px;
  color: var(--grey);
  line-height: 1.6;
}

.product-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.product-item {
  background: var(--white);
  border-radius: 8px;
  overflow: hidden;
}
.product-item img { width: 100%; height: 200px; object-fit: cover; }
.product-item h4 {
  padding: 20px 20px 10px;
  font-size: 16px;
  color: var(--ink);
}
.product-item p {
  padding: 0 20px 20px;
  font-size: 14px;
  color: var(--grey);
  line-height: 1.6;
}


/* ===========================================================
   响应式
   =========================================================== */
@media (max-width: 1200px) {
  :root { --header-h: 110px; }
  .header-inner { gap: 24px; }
  .main-nav { gap: 32px; }
  .header-aside { gap: 12px; }
  .footer-cols { gap: 100px; }
  .news-layout { gap: 40px; }
}

@media (max-width: 980px) {
  :root { --header-h: 80px; }
  .main-nav, .header-aside { display: none; }
  .nav-toggle { display: flex; }
  .brand { width: 150px; }
  .brand-top { height: 56px; padding: 0 12px; gap: 8px; }
  .brand-logo { width: 32px; height: 28px; }
  .brand-name { font-size: 18px; }
  .brand-bottom { height: 24px; padding: 0 10px; }
  .brand-slogan { font-size: 12px; }

  .main-nav.open {
    display: flex;
    position: absolute;
    top: var(--header-h); left: 0; right: 0;
    flex-direction: column;
    background: var(--white);
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
    padding: 20px var(--gutter);
    gap: 16px;
  }
  .main-nav.open .nav-link { color: var(--ink); font-size: 16px; }
  .main-nav.open .nav-link.active { font-weight: 700; }
  .main-nav.open .nav-link.active::after { display: none; }

  .main-nav.open .nav-dropdown {
    position: relative;
    display: flex;
    flex-direction: column;
  }
  .main-nav.open .nav-dropdown::after { display: none; }
  .main-nav.open .dropdown-trigger {
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
  }
  .main-nav.open .dropdown-trigger::after {
    display: inline-block;
    border-top-color: var(--ink);
    transition: transform 0.3s ease;
  }
  .main-nav.open .nav-dropdown.open .dropdown-trigger::after {
    transform: rotate(180deg);
  }
  .main-nav.open .dropdown-menu {
    display: none;
    position: static;
    background: transparent;
    box-shadow: none;
    border-radius: 0;
    min-width: auto;
    padding: 6px 0 6px 20px;
    margin-top: 0;
    overflow: visible;
  }
  .main-nav.open .dropdown-menu::before { display: none; }
  .main-nav.open .nav-dropdown.open .dropdown-menu {
    display: block;
  }
  .main-nav.open .dropdown-item {
    display: block;
    padding: 10px 0;
    font-size: 15px;
    color: var(--grey);
    background: transparent;
  }
  .main-nav.open .dropdown-item:hover {
    background: transparent;
    color: var(--blue-deep);
  }

  .banner { min-height: 560px; }
  .banner-blue { position: relative; width: 100%; height: auto; min-height: 240px; padding: 50px var(--gutter); }
  .banner-figure { position: relative; top: 0; width: 100%; height: 300px; margin-top: 0; }

  .stats { grid-template-columns: 1fr; }
  .products .product-grid { grid-template-columns: repeat(2, 1fr); }
  .products .product-tabs { gap: 20px; }
  .products .product-img { height: 400px; }

  .industry-lines { grid-template-columns: repeat(3, 1fr); }
  .industry-panel { width: 33%; --panel-w: 33; padding: 30px 20px; }
  .panel-marker { width: 4px; height: 28px; margin-bottom: 18px; }
  .panel-title { font-size: 22px; }
  .panel-subtitle { font-size: 13px; margin-bottom: 18px; }
  .panel-desc { font-size: 12px; line-height: 1.7; }
  .panel-btn { padding: 10px 22px; font-size: 12px; }
  .industry-nav { gap: 8px; padding: 0 10px; }
  .item-icon-wrap { width: 48px; height: 48px; }
  .item-label { font-size: 12px; }

  .news-layout { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: 1fr; gap: 30px; }
  .footer-cols { justify-content: flex-start; gap: 60px; }
  .copy-inner { flex-direction: column; text-align: center; }

  .about-card { grid-template-columns: 1fr; }
  .features-grid,
  .product-features .features-grid { grid-template-columns: repeat(2, 1fr); }
  .company-stats { gap: 40px; }
  .honors-grid { grid-template-columns: repeat(2, 1fr); }
  .timeline::before { left: 50px; }
  .timeline-year { width: 45px; font-size: 20px; margin-right: 12px; }
  .timeline-dot { width: 12px; height: 12px; margin-right: 15px; }
  .timeline-text { font-size: 16px; }
  .qual-grid { grid-template-columns: repeat(2, 1fr); }
  .news-article { grid-template-columns: 1fr; }
  .industry-grid { grid-template-columns: repeat(2, 1fr); }
  .solutions-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .map-wrapper { grid-template-columns: 1fr; gap: 30px; }

  .product-detail .section-inner { grid-template-columns: 1fr; }
  .news-detail .section-inner { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .product-list { grid-template-columns: repeat(2, 1fr); }

  .product-list-section .product-grid { grid-template-columns: repeat(2, 1fr); }
  .product-list-section .product-img { height: 180px; }
  .product-tab { padding: 10px 22px; font-size: 14px; }
}

@media (max-width: 640px) {
  :root { --gutter: 18px; }
  .brand-slogan { font-size: 13px; }

  .hero { min-height: 520px; }
  .hero-scroll { display: none; }
  .hero-indicators { gap: 8px; }
  .indicator { width: 36px; }

  .about { padding: 60px var(--gutter); }
  .stat-card { min-height: 240px; padding: 30px 20px; border-radius: 50px 0 0 0; }

  .products .product-grid { grid-template-columns: 1fr; }
  .products .product-tabs { flex-direction: column; gap: 14px; }
  .products .tab { width: 100%; height: 50px; font-size: 18px; }
  .products .product-img { height: 300px; }

  .industry-lines { display: none; }
  .industry-panel { width: 100%; left: 0 !important;  padding: 30px var(--gutter); }
  .panel-marker { width: 4px; height: 24px; margin-bottom: 16px; }
  .panel-title { font-size: 24px; }
  .panel-subtitle { font-size: 14px; margin-bottom: 20px; }
  .panel-desc { font-size: 13px; line-height: 1.7; }
  .panel-btn { padding: 10px 24px; font-size: 13px; }
  .industry-nav { display: none; }
  .industry-item span { font-size: 12px; }

  .friend-links { gap: 24px; }
  .friend-links a { font-size: 22px; }
  .footer-cols { flex-direction: column; gap: 30px; }

  .news-item { gap: 16px; padding: 20px 0; }
  .date-md { font-size: 24px; }
  .date-yr { font-size: 16px; }

  .features-grid,
  .product-features .features-grid { grid-template-columns: 1fr; }
  .company-stats { flex-direction: column; gap: 20px; }
  .honors-grid { grid-template-columns: 1fr; }
  .timeline::before { left: 35px; }
  .timeline-year { width: 30px; font-size: 18px; margin-right: 10px; }
  .timeline-dot { width: 10px; height: 10px; margin-right: 12px; border-width: 2px; }
  .timeline-text { font-size: 15px; }
  .qual-grid { grid-template-columns: 1fr; }
  .qual-tabs { flex-wrap: wrap; }
  .qual-tab { flex: 1; min-width: 100px; }
  .industry-grid { grid-template-columns: 1fr; }
  .industry-card { height: 300px; }
  .solutions-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .map-container { height: 280px; }
  .about-card-img img { height: 280px; }

  .cases-grid { grid-template-columns: 1fr; }
  .product-list { grid-template-columns: 1fr; }
  .article-nav { flex-direction: column; gap: 10px; }

  .gallery-main { height: 300px; }
  .gallery-thumbs img { width: 60px; height: 60px; }
  .param-table { font-size: 13px; }
  .param-table th, .param-table td { padding: 10px 12px; }

  .detail-article { padding: 20px; }
  .article-meta { flex-direction: column; gap: 8px; }
  .tag { padding: 4px 10px; font-size: 12px; }

  .detail-hero { height: 250px; }
  .detail-hero-text { left: var(--gutter); bottom: 20px; }
  .detail-hero-text h2 { font-size: 22px; }
  .solution-item { flex-direction: column; align-items: flex-start; }

  .contact-card { padding: 24px 20px; }
  .contact-card-link .contact-arrow { opacity: 1; transform: translateX(0); }
  .page-main { padding: 40px 0; }
  .company-section { padding: 60px 0; }
  .honor-item img { height: 150px; }

  .product-list-section .product-grid { grid-template-columns: 1fr; }
  .product-list-section .product-img { height: 200px; }
  .product-tab { padding: 10px 18px; font-size: 14px; }
  .feature-item { padding: 20px 0; }
}

/* 尊重用户减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}