@charset "UTF-8";

/* ========== 1. 变量与基础重置 ========== */
:root {
  --orange: #ff681b;
  --orange-dark: #ed5b12;
  --navy: #062b61;
  --ink: #171717;
  --muted: #777;
  --light: #f6f6f6;
  --line: #e7e7e7;
  --container: 1600px;
  --gutter: 30px;
  --header-height: 78px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  overflow-x: hidden;
}

body {
  font-family: "Arial", "Helvetica Neue", Helvetica, sans-serif;
  color: var(--ink);
  font-size: 14px;
  line-height: 1.65;
  background: #fff;
}

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

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

button,
input,
textarea,
select {
  font: inherit;
}

.container {
  width: calc(100% - (var(--gutter) * 2));
  max-width: var(--container);
  margin: 0 auto;
}

/* ========== 2. 导航栏 ========== */
.site-header {
  height: var(--header-height);
  background: #fff;
  border-bottom: 1px solid #eee;
  position: relative;
  z-index: 100;
}

.header-inner {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 2px;
}

.brand-logo {
  width: 40px;
  height: 40px;
  position: relative;
}

.brand-logo:before {
  content: "";
  position: absolute;
  left: 3px;
  bottom: 3px;
  width: 27px;
  height: 27px;
  border: 4px solid #111;
  border-radius: 50%;
}

.brand-logo:after {
  content: "JH";
  position: absolute;
  left: 13px;
  top: 3px;
  font-weight: 900;
  font-size: 16px;
  line-height: 1;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 13px;
  font-weight: 600;
}

.nav a {
  position: relative;
  padding: 29px 0;
}

.nav a:after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 19px;
  height: 2px;
  background: var(--orange);
  transform: scaleX(0);
  transition: 0.2s;
}

.nav a:hover:after,
.nav a.active:after {
  transform: scaleX(1);
}

.menu-toggle {
  display: none;
  border: 0;
  background: transparent;
  font-size: 27px;
  line-height: 1;
}

/* ========== 3. Hero Banner ========== */
.hero {
  position: relative;
  overflow: hidden;
  width: 100%;
}

.hero-media {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-dark:after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.36);
}

.hero-content {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #fff;
}

.hero-content h1 {
  font-size: 34px;
  line-height: 1.2;
  margin: 0 0 8px;
  font-weight: 800;
}

.hero-content p {
  font-size: 14px;
  line-height: 1.55;
  margin: 0 auto 18px;
  max-width: 760px;
}

.hero-btn,
.orange-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--orange);
  border: 1px solid var(--orange);
  color: #fff;
  padding: 10px 24px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 700;
}

/* ========== 4. 面包屑 ========== */
.breadcrumb {
  height: 46px;
  border-bottom: 1px solid #eee;
  display: flex;
  align-items: center;
  color: #999;
  font-size: 12px;
}

.breadcrumb .right-title {
  margin-left: auto;
  color: #111;
  font-size: 14px;
  font-weight: 700;
}

/* ========== 5. 通用区块 ========== */
.section {
  padding: 60px 0;
}

.section-gray {
  background: #ffffff;
}

.section-title {
  text-align: center;
  margin-bottom: 34px;
}

.section-title h2 {
  font-size: 30px;
  line-height: 1.25;
  margin: 0 0 8px;
}

.section-title p {
  font-size: 18px;
  color: #777;
  margin: 0;
}

.section-title .line {
  width: 35px;
  height: 3px;
  background: var(--orange);
  margin: 10px auto 0;
}

/* ========== 6. 两列布局 & 关于我们 ========== */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 90px;
  align-items: center;
}

.about-copy h2 {
  font-size: 29px;
  line-height: 1.18;
  margin: 7px 0 18px;
}

.about-copy p {
  font-size: 16px;
  color: #555;
  margin: 0 0 12px;
}

.small-label {
  font-size: 24px;
  line-height: 1.18;
  font-weight: 700;
  color: #333;
  margin: 7px 0 18px;
}

/* ========== 7. 视频区 ========== */
.video-box {
  position: relative;
  overflow: hidden;
  background: #ddd;
}

.video-box img {
  width: 100%;
  display: block;
}

.play {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 58px;
  height: 58px;
  border: 2px solid #fff;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 24px;
  background: #0003;
}

/* ========== 8. 三列信息卡片 ========== */
.cards-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.cards-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.info-card {
  background: #fff;
  border: 1px solid #eee;
}

.info-card.orange {
  background: var(--orange);
  color: #fff;
  border-color: var(--orange);
}

.info-icon {
  width: 80px;
  height: 80px;
  display: grid;
  place-items: center;
  font-size: 18px;
}

.info-card h3 {
  font-size: 26px;
  margin: 12px 0 7px;
}

.info-card p {
  font-size: 16px;
  line-height: 1.7;
  color: #666;
  margin: 0;
}

.info-card.orange p {
  color: #fff;
}

.info-more {
  display: flex;
  justify-content: space-between;
  margin-top: 16px !important;!i;!;
  font-size: 14px;
  color: var(--orange);
  width: 100px;
  margin: 0 auto;
}

.info-card.orange .info-more {
  color: #fff;
}

/* ========== 9. 图片条 & 历史 ========== */
.image-strip {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
}

.image-strip img {
  width: 100%;
  height: 145px;
  background: #aaa;
}

.history {
  min-height: clamp(260px,32vw,590px);
  background: url("../assets/about_timeline.jpg") center/cover no-repeat;
  display: flex;
  align-items: center;
}

.history-copy {
  max-width: 430px;
}

.history-copy h2 {
  font-size: 32px;
  line-height: 1.08;
  color: var(--navy);
  margin: 7px 0 0;
}

.history-copy p {
  font-size: 12px;
  color: #445;
  margin-top: 15px;
}

/* ========== 10. CTA ========== */
.cta {
  min-height: 320px;
  position: relative;
  overflow: hidden;
  color: #000;
  text-align: center;
  display: grid;
  place-items: center;
}

.cta-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.cta-inner {
  position: relative;
  z-index: 2;
  padding: 25px;
  color: #fff;
}

.cta h2 {
  font-size: 36px;
  line-height: 1.2;
  margin: 0 0 10px;
}

.cta p {
  font-size: 16px;
  margin: 0 auto 20px;
  max-width: 768px;
}

/* ========== 11. 案例网格 ========== */
.case-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 48px 30px;
}

.case-card {
  text-align: center;
}

.case-card img {
  width: 100%;
}

.case-card h3 {
  font-size: 13px;
  line-height: 1.45;
  min-height: 38px;
  margin: 10px 5px 10px;
  font-weight: 500;
}

.outline-btn {
  display: inline-flex;
  border: 1px solid #efb28e;
  color: var(--orange);
  padding: 7px 17px;
  border-radius: 20px;
  font-size: 9px;
  background: #fff;
}

.pagination {
  display: flex;
  justify-content: center;
  gap: 7px;
  margin-top: 38px;
}

.page-btn {
  min-width: 34px;
  height: 31px;
  border: 1px solid #e6e6e6;
  background: #fff;
  color: #999;
  border-radius: 5px;
  display: grid;
  place-items: center;
  font-size: 10px;
}

.page-btn.current {
  background: var(--orange);
  color: #fff;
  border-color: var(--orange);
}

/* ========== 12. 表单 ========== */
.form {
  width: min(680px, 100%);
  margin: 0 auto;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px 20px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.field label {
  font-size: 12px;
  color: #222;
}

.field input,
.field textarea,
.field select {
  border: 1px solid #cfcfcf;
  background: #fff;
  padding: 10px 12px;
  min-height: 38px;
  outline: none;
}

.field textarea {
  min-height: 120px;
  resize: vertical;
}

.full {
  grid-column: 1/-1;
}

.submit-row {
  display: flex;
  align-items: center;
  gap: 18px;
}

.submit-row .orange-btn {
  cursor: pointer;
}

/* ========== 13. 留言卡片 ========== */
#contact-form {
  margin: 30px auto;
  padding: 20px;
  font-family: Arial, sans-serif;
  color: #333;
}

.form-item {
  display: flex;
  align-items: center; 
  margin-bottom: 20px;
}

.form-item label {
  flex: 0 0 180px; 
  text-align: right;
  padding-right: 25px;
  margin-right: 0;
  font-weight: bold;
  font-size: 14px;
}

.form-item .selectpicker {
  width: 25%;
  padding: 12px 15px;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 14px;
  color: #333;
  outline: none;
  transition: all 0.3s ease;
  margin-right: 2%;
}

.form-item .form-control {
  flex: 1; /* 占据剩余空间 */
  padding: 12px 15px;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 14px;
  color: #333;
  outline: none;
  transition: all 0.3s ease;
}

/* 输入框聚焦时的边框颜色 */
.form-item .form-control:focus {
  border-color: #f28c28;
  box-shadow: 0 0 0 0.2rem rgba(242, 140, 40, 0.25);
}

/* 将电话区号和电话号码放入一个容器内并排显示 */
.form-phone-box {
  display: flex;
  align-items: center;
  flex: 1;
}

.form-phone-box .form-control {
  flex: 1;
  margin-left: 10px;
}


/* 因为文本框很高，需要让标签和它顶部对齐，而不是垂直居中 */
.form-item textarea#mess-con {
  height: 180px; /* 控制文本框高度 */
  resize: vertical; /* 允许用户上下拖动调整大小 */
  align-self: flex-start; /* 将文本框定位到容器顶部 */
}


.form-item.captcha .form-group {
  width: 100%;
  margin-top: 10px;
}

.custom-control {
  display: flex;
  align-items: flex-start; /* 让复选框和文字顶部对齐 */
  justify-content: flex-end;
}

/* 修复原生 input checkbox 不显示或尺寸过小的问题 */
.custom-control-input {
  width: 18px;
  height: 18px;
  margin-right: 10px;
  margin-top: 3px;
  cursor: pointer;
}

.custom-control-label {
  font-weight: normal;
  font-size: 13px;
  line-height: 1.5;
  cursor: pointer;
}

/* ================= 验证码与底部按钮区域 ================= */
.captcha {
  display: block;
  margin-top: 25px;
}

.captcha p {
  font-size: 13px;
  color: #555;
  margin-bottom: 10px;
  text-align: right;
}

.captcha a {
  color: #f28c28;
  text-decoration: none;
}

.captcha a:hover {
  text-decoration: underline;
}

/* 提交按钮居中，并添加圆角和颜色 */
.submit-btn {
  display: block;
  margin: 30px auto 0;
  padding: 14px 50px;
  background-color: #f28c28; /* 橙色背景 */
  color: #fff;
  border: none;
  border-radius: 4px;
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.submit-btn:hover {
  background-color: #e07b20;
}

/* ================= 响应式设计 (适配手机屏幕) ================= */
@media (max-width: 650px) {
  .form-item {
    flex-direction: column; /* 手机上改为上下堆叠布局 */
    align-items: stretch;
    margin-bottom: 15px;
  }
  
  .form-item label {
    text-align: left;
    padding-right: 0;
    margin-bottom: 8px;
    flex: none; /* 取消固定宽度 */
  }
  
  .form-phone-box {
    flex-direction: column; /* 手机上电话号码也上下排列 */
  }
  
  .form-phone-box .form-control {
    margin-left: 0;
    margin-top: 10px;
  }
}

/* ========== 14. 地图 & 位置 ========== */
/* 整体左右布局 */
.map-area {
  display: flex;
  width: 1200px;
  margin: 0 auto;
  height: 460px;
  background: #f9f9f9;
  justify-content: space-between;
}

/* 左侧图片区域 */
.map-box {
  /* flex: 1; */
  float: left;
  position: relative;
}

.map-box img {
  width: 100%;
  height: 100%;
}

@media (max-width: 768px) {
  .map-area {
    display: flex;
    flex-direction: column;
  }

  .map-box {
    flex: 0;
  }
}

/* 右侧面板 */
.location-panel {
  float: left;
  width: 300px;
  /* 固定右侧宽度 */
  background: #fff;
}

/* 单个点击区域 */
.location-item {
  padding: 25px 20px;
  border-bottom: 1px solid #eee;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  /* 让文字靠左，图标靠右 */
  align-items: center;
  transition: background-color 0.3s ease;
}

/* 右侧的橙色气泡图标 (用伪元素画出来，方便控制) */
.location-item::after {
  content: "";
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 2px solid #e0e0e0;
  border-radius: 50%;
  /* 默认灰色圆圈 */
  position: relative;
}

/* 模拟图标里的三条线 */
.location-item::before {
  content: "";
  position: absolute;
  right: 28px;
  /* 根据圆圈位置微调 */
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 12px;
  background: repeating-linear-gradient(to bottom,
      #e0e0e0 0,
      #e0e0e0 2px,
      transparent 2px,
      transparent 5px);
}

/* 鼠标悬停和激活状态 */
.location-item:hover,
.location-item.active {
  background-color: #f0f0f0;
  /* 灰色背景高亮 */
}

/* 激活状态下的图标变成橙色 */
.location-item.active::after {
  border-color: #ff6600;
}

.location-item.active::before {
  background: repeating-linear-gradient(to bottom,
      #ff6600 0,
      #ff6600 2px,
      transparent 2px,
      transparent 5px);
}

/* ========== 15. 产品标签 & 网格 ========== */
.product-tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0;
  background: #f2f2f2;
  border-radius: 25px;
  padding: 0;
  width: max-content;
  max-width: 100%;
  margin: 0 auto 40px;
  overflow: hidden;
}

.product-tabs a {
  padding: 12px 17px;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.product-tabs a.active {
  background: #111;
  color: #fff;
  border-radius: 22px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 58px 38px;
}

.product-card img {
  width: 100%;
}

.product-card h3 {
  font-size: 13px;
  line-height: 1.45;
  min-height: 37px;
  margin: 10px 0 12px;
  font-weight: 500;
}

.product-card {
  text-align: left;
}

.product-card .outline-btn {
  font-size: 9px;
}

/* ========== 16. 支持条 ========== */
.support-strip {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  min-height: 230px;
}

.support-copy {
  padding: 45px 50px;
  background: #f5f5f5;
}

.support-copy h2 {
  font-size: 22px;
  margin: 0 0 8px;
}

.support-copy p {
  font-size: 12px;
  color: #777;
}

.support-image {
  background: url("../assets/solutions_hero.jpg") center/cover;
  position: relative;
}

.support-image:after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(34, 99, 204, 0.63);
}

.support-image .inner {
  position: relative;
  z-index: 2;
  color: #fff;
  padding: 45px;
}

.support-image h2 {
  font-size: 20px;
  margin: 0 0 8px;
}

/* ========== 17. 品牌条 ========== */
.brand-strip {
  display: flex;
  justify-content: space-around;
  align-items: center;
  gap: 20px;
  padding: 35px 30px;
  font-size: 15px;
  font-weight: 700;
  color: #555;
  border-top: 1px solid #eee;
}

/* ========== 18. 详情页 ========== */
.detail-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 85px;
  align-items: start;
}

.detail-image img {
  width: 100%;
}

.detail-copy h2 {
  font-size: 20px;
  color: #2473ac;
  margin: 0 0 15px;
}

.detail-copy p {
  font-size: 14px;
  color: #555;
}

.check-list {
  list-style: none;
  padding: 0;
  margin: 17px 0;
}

.check-list li {
  font-size: 12px;
  margin: 6px 0;
  color: #555;
}

.check-list li:before {
  content: ">";
  color: var(--orange);
  font-weight: 700;
  margin-right: 8px;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin: 55px 0 28px;
  font-size: 12px;
}

.spec-table th,
.spec-table td {
  border: 1px solid #bbb;
  padding: 8px;
  text-align: center;
}

.spec-table th {
  color: var(--orange);
  font-weight: 700;
}

.detail-heading {
  font-size: 17px;
  color: #2473ac;
  margin: 0 0 10px;
}

.detail-text {
  font-size: 14px;
  color: #666;
}

.accordion {
  border-top: 1px solid #ddd;
  margin-top: 18px;
}

.acc-item {
  border-bottom: 1px solid #ddd;
}

.acc-button {
  width: 100%;
  background: #fff;
  border: 0;
  padding: 13px 0;
  text-align: left;
  display: flex;
  justify-content: space-between;
  cursor: pointer;
  color: #6c9ab8;
  font-size: 12px;
}

.acc-content {
  display: none;
  font-size: 12px;
  color: #666;
  padding: 0 0 14px;
}

.acc-item.open .acc-content {
  display: block;
}

.download-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #fafafa;
  border-bottom: 1px solid #eee;
  padding: 12px 14px;
  margin-top: 24px;
  font-size: 12px;
}

.download-bar strong {
  color: var(--orange);
}

.download-bar a {
  background: var(--orange);
  color: #fff;
  padding: 5px 14px;
  border-radius: 15px;
  font-size: 9px;
}

.detail-gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.detail-gallery img {
  width: 100%;
}

.project-explore {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 15px;
  background: #f3f3f3;
}

.project-explore-copy {
  padding: 38px;
}

.project-explore-copy h2 {
  font-size: 20px;
  line-height: 1.15;
}

.project-explore-images {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5px;
}

.project-explore-images img {
  width: 100%;
  height: 180px;
}

/* ========== 19. 产品询盘区 ========== */
.product-inquiry-section {
  background: #f4f4f4;
  margin-top: 0;
  width: 100%;
}

.product-inquiry-inner {
  width: calc(100% - (var(--gutter) * 2));
  max-width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr;
  min-height: 300px;
}

.product-inquiry-form {
  padding: 45px 52px 34px;
  background: #f3f3f3;
}

.product-inquiry-form h2 {
  margin: 0 0 14px;
  color: #0068bd;
  font-size: 20px;
  font-weight: 700;
}

.inquiry-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 18px;
}

.inquiry-grid input,
.inquiry-grid select,
.inquiry-grid textarea {
  width: 100%;
  box-sizing: border-box;
  border: 0;
  background: #fff;
  height: 34px;
  padding: 0 12px;
  color: #555;
  font: inherit;
  font-size: 12px;
  outline: none;
}

.inquiry-grid textarea {
  height: 115px;
  padding-top: 10px;
  resize: none;
  grid-row: 3 / span 2;
}

.phone-field {
  display: grid;
  grid-template-columns: 1fr 1.35fr;
  background: #fff;
  height: 34px;
}

.phone-field select,
.phone-field input {
  height: 34px;
  background: transparent;
}

.phone-field select {
  border-right: 1px solid #eee;
  padding-right: 3px;
}

.inquiry-side {
  display: flex;
  flex-direction: column;
}

.inquiry-send {
  height: 34px;
  border: 0;
  background: #05285c;
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}

.privacy-check {
  display: flex;
  gap: 8px;
  margin-top: 9px;
  color: #10264d;
  font-size: 8px;
  font-weight: 700;
  line-height: 1.45;
  align-items: flex-start;
}

.privacy-check input {
  width: 12px;
  height: 12px;
  min-width: 12px;
  margin: 0;
  margin-top: 1px;
}

.captcha-note {
  font-size: 7px;
  color: #bbb;
  line-height: 1.45;
  margin: 15px 0 0;
}

.inquiry-support {
  position: relative;
  overflow: hidden;
  background: url("../assets/solutions_hero.jpg") center/cover no-repeat;
  min-height: 300px;
}

.inquiry-support-overlay {
  position: absolute;
  inset: 0;
  background: rgba(47, 103, 214, 0.68);
}

.inquiry-support-content {
  position: relative;
  z-index: 1;
  padding: 52px 48px;
  color: #fff;
}

.inquiry-support-content h2 {
  font-size: 23px;
  line-height: 1.2;
  margin: 0 0 14px;
}

.inquiry-support-content p {
  font-size: 12px;
  line-height: 1.7;
  margin: 0 0 22px;
  max-width: 330px;
  color: #eef4ff;
}

.inquiry-contact-btn {
  display: inline-block;
  border: 1px solid rgba(255, 255, 255, 0.9);
  padding: 7px 15px;
  color: #fff;
  font-size: 9px;
}

/* 案例页全宽询盘 */
.cases-inquiry-section,
body:has(.case-grid) .demo-inquiry-section {
  width: 100%;
  max-width: none;
  margin: 0;
  box-sizing: border-box;
}

.cases-inquiry-inner {
  width: calc(100% - (var(--gutter) * 2));
  max-width: var(--container);
  margin: 0 auto;
}

/* ========== 20. 平板适配 (≤1000px) ========== */
@media (max-width: 1000px) {
  .nav {
    gap: 17px;
    font-size: 12px;
  }

  .case-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .product-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .contact-cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .image-strip {
    grid-template-columns: repeat(3, 1fr);
  }

  .image-strip img {
    height: 140px;
  }
}

/* ========== 21. 手机适配 (≤700px) ========== */
@media (max-width: 768px) {
  :root {
    --gutter: 16px;
    --header-height: 64px;
  }

  body {
    font-size: 13px;
  }

  /* 导航 */
  .brand {
    font-size: 14px;
  }

  .brand-logo {
    width: 35px;
    height: 35px;
  }

  .brand-logo:before {
    width: 23px;
    height: 23px;
    border-width: 3px;
  }

  .brand-logo:after {
    font-size: 14px;
    left: 12px;
  }

  .menu-toggle {
    display: block;
  }

  .nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 64px;
    background: #fff;
    border-bottom: 1px solid #ddd;
    padding: 8px 18px;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    box-shadow: 0 8px 20px #0001;
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    width: 100%;
    padding: 12px 0;
  }

  .nav a:after {
    bottom: 5px;
  }

  /* Hero */
  .hero {
    height: 220px;
  }

  .hero-content h1 {
    font-size: 22px;
  }

  .hero-content p {
    font-size: 10px;
  }

  .hero-btn,
  .orange-btn {
    font-size: 10px;
    padding: 9px 18px;
  }

  /* 通用 */
  .breadcrumb {
    height: 40px;
    font-size: 10px;
  }

  .section {
    padding: 40px 0;
  }

  .section-title {
    margin-bottom: 25px;
  }

  .section-title h2 {
    font-size: 22px;
  }

  .section-title p {
    font-size: 14px;
  }

  /* 布局切换为单列 */
  .two-col,
  .detail-layout,
  .map-area,
  .support-strip,
  .project-explore {
    grid-template-columns: 1fr;
    gap: 25px;
  }

  .about-copy h2 {
    font-size: 21px;
  }

  .about-copy p,
  .detail-copy p,
  .detail-text {
    font-size: 14px;
  }

.cards-3 {
    grid-template-columns: 1fr;
  }

  .cards-4 {
    grid-template-columns: 1fr;
  }

  .info-card {
    min-height: 0;
    padding: 22px;
  }

  .info-card h3 {
    font-size: 18px;
  }

  .info-card p {
    font-size: 12px;
  }

  .image-strip {
    grid-template-columns: repeat(2, 1fr);
  }

  .image-strip img {
    height: 120px;
  }

  .history {
    min-height: 135px;
  }

  .history-copy h2 {
    font-size: 24px;
  }

  .case-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 27px 10px;
  }

  .case-card h3 {
    font-size: 10px;
    min-height: 43px;
  }

  .contact-cards {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .contact-card-image {
    height: 105px;
  }

  .contact-card h3 {
    font-size: 12px;
  }

  .contact-card p {
    font-size: 9px;
  }

  .contact-icon {
    width: 44px;
    height: 44px;
    font-size: 18px;
  }

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

  .full {
    grid-column: auto;
  }

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

  .product-tabs {
    width: 100%;
    justify-content: flex-start;
    border-radius: 0;
    overflow: auto;
  }

  .product-tabs a {
    font-size: 9px;
    padding: 10px 12px;
  }

  .product-grid {
    grid-template-columns: 1fr 1fr;
    gap: 30px 12px;
  }

  .product-card h3 {
    font-size: 10px;
    min-height: 46px;
  }

  .brand-strip {
    overflow: hidden;
    gap: 25px;
    font-size: 10px;
    justify-content: flex-start;
    padding: 22px 16px;
  }

  .spec-table {
    font-size: 8px;
    margin: 35px 0 20px;
  }

  .spec-table th,
  .spec-table td {
    padding: 6px 3px;
  }

  .detail-gallery {
    grid-template-columns: 1fr 1fr;
  }

  .project-explore-copy {
    padding: 25px;
  }

  .project-explore-images img {
    height: 125px;
  }

  .cta {
    min-height: 240px;
  }

  .cta h2 {
    font-size: 22px;
  }

  .cta p {
    font-size: 12px;
  }

  /* 询盘区手机端 */
  .product-inquiry-inner {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .product-inquiry-form {
    padding: 26px 18px;
  }

  .product-inquiry-form h2 {
    font-size: 17px;
  }

  .inquiry-grid {
    grid-template-columns: 1fr;
    gap: 9px;
  }

  .inquiry-grid textarea {
    grid-row: auto;
    height: 100px;
  }

  .phone-field {
    grid-template-columns: 1fr 1.4fr;
  }

  .inquiry-support {
    min-height: 250px;
  }

  .inquiry-support-content {
    padding: 34px 25px;
  }

  .inquiry-support-content h2 {
    font-size: 20px;
  }

  .inquiry-support-content p {
    font-size: 10px;
  }
}

.singgle-main,
.news-d-main,
.pro-main,
.news-main {
  padding-top: calc(var(--header-height) + 40px);
}

.hero-ban {
  /* background-color: rgba(0, 0, 0, 0.3); */
  padding: 40px 20px;
  width: 100%;
}

@media (max-width: 768px) {
  .singgle-main,
  .news-d-main,
  .pro-main,
  .news-main {
    padding-top: var(--header-height);
  }

  .hero-ban {
    background-color: rgba(0, 0, 0, 0.3);
    padding: 20px;
    width: 100%;
  }
}

  .mk-sec-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    padding: 40px 20px;
    max-width: 1600px;
    margin: 0 auto;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
  }


  .mk-sec-card {
    flex: 1;
    min-width: 300px; 
    display: flex;
    flex-direction: column;
    background-color: #ffffff;
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    box-sizing: border-box;
  }


  .mk-sec-container * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    line-height: 1.5;
  }

  .mk-sec-image-box {
    width: 100%;
    padding-top: 56.25%; 
    position: relative;
    background-color: #f4f4f4;
  }

  .mk-sec-image-box img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    border: none;
  }

  .mk-sec-content {
    padding: 25px 30px;
  }

  .mk-sec-title {
    font-size: 30px;
    font-weight: 700;
    color: #222222;
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    line-height: 1.2;
  }

  .mk-sec-desc {
    font-size: 16px;
    color: #666666;
    line-height: 1.6;
    text-align: justify;
  }

  @media (max-width: 768px) {
    .mk-sec-container {
      flex-direction: column;
      gap: 25px;
      padding: 20px 15px;
    }

    .mk-sec-card {
      min-width: 100%; 
    }

    .mk-sec-title {
      font-size: 18px;
      margin-bottom: 12px;
    }

    .mk-sec-desc {
      font-size: 13px;
    }
  }