/* ============================================================
   云顶金属 · 企业官网全局样式
   主题：靛蓝 + 暖中性 + 金属金（纯色，无渐变）
   技术：原生 HTML + 外链 CSS，仅 Flex 布局，px 单位
   ============================================================ */

/* ---------- Reset ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
img { display: block; object-fit: cover; }

/* 图片容器统一：真实图片填满裁切 */
.home-about-img img,
.home-product-img img,
.home-scene-img img,
.home-case-main .case-img img,
.home-case-side-img img,
.home-news-left .news-feature img,
.about-company-img .big-img img,
.about-company-img .small-imgs div img,
.product-card-img img,
.product-detail-img .detail-big img,
.case-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.home-product-img,
.home-scene-img,
.home-case-main .case-img,
.home-case-side-img,
.home-news-left .news-feature,
.about-company-img .big-img,
.about-company-img .small-imgs div,
.product-card-img,
.product-detail-img .detail-big,
.case-card-img {
  overflow: hidden;
}

button, input, textarea { font-family: inherit; outline: none; border: none; }

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  color: #26282b;
  background: #ffffff;
  font-size: 15px;
  line-height: 1.7;
}

/* ---------- 通用容器 / 标题 ---------- */
.public-width { width: 1400px; margin: 0 auto; }

.page-title { text-align: center; padding: 66px 0 42px 0; }
.page-title h3 {
  font-size: 34px;
  color: #1f3b5c;
  letter-spacing: 2px;
  font-weight: 700;
  position: relative;
  display: inline-block;
}
.page-title h3::after {
  content: "";
  display: block;
  width: 46px;
  height: 3px;
  background: #b8915a;
  margin: 14px auto 0 auto;
}
.page-title .page-title-en {
  font-size: 14px;
  color: #b8915a;
  letter-spacing: 5px;
  text-transform: uppercase;
  margin-top: 6px;
}

/* ---------- 顶部信息条 ---------- */
.topbar { background: #14293f; height: 40px; line-height: 40px; color: #cdd6e0; font-size: 13px; }
.topbar-box { display: flex; justify-content: space-between; align-items: center; height: 40px; }
.topbar-left { display: flex; align-items: center; }
.topbar-left span { margin-right: 26px; }
.topbar-left .topbar-icon {
  display: inline-block;
  width: 14px;
  height: 14px;
  background: #b8915a;
  border-radius: 50%;
  margin-right: 7px;
  vertical-align: -2px;
}
.topbar-right { display: flex; align-items: center; }
.topbar-right a { color: #cdd6e0; margin-left: 22px; transition: color 0.25s; }
.topbar-right a:hover { color: #b8915a; }
.topbar-right .topbar-phone { color: #e6d3b3; font-weight: 600; letter-spacing: 1px; }

/* ---------- 主导航 ---------- */
.header { background: #ffffff; border-bottom: 1px solid #ece7de; position: relative; }
.header-main { display: flex; align-items: center; justify-content: space-between; height: 86px; }
.logo { display: flex; align-items: center; }
.logo-img { width: 52px; height: 52px; object-fit: contain; margin-right: 14px; }
.footer-logo-img { width: 52px; height: 52px; object-fit: contain; margin-right: 14px; background: #ffffff; border-radius: 6px; padding: 4px; }
.logo-text h1 { font-size: 24px; color: #1f3b5c; font-weight: 700; letter-spacing: 2px; }
.logo-text p { font-size: 11px; color: #b8915a; letter-spacing: 3px; text-transform: uppercase; }

.nav { display: flex; align-items: center; }
.nav #menu { display: flex; align-items: center; }
.nav #menu li { position: relative; margin: 0 4px; }
.nav #menu li a {
  display: block;
  padding: 0 22px;
  height: 86px;
  line-height: 86px;
  font-size: 16px;
  color: #33373d;
  transition: color 0.25s;
  position: relative;
}
.nav #menu li a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  background: #b8915a;
  transition: width 0.3s;
}
.nav #menu li a:hover { color: #1f3b5c; }
.nav #menu li a:hover::after { width: 100%; }
.nav #menu li a.active { color: #1f3b5c; font-weight: 600; }
.nav #menu li a.active::after { width: 100%; }

.header-box { display: flex; align-items: center; }
.nav-toggle { display: none; }
.nav-colored .header-main { box-shadow: 0 4px 16px rgba(20,41,63,0.08); }

/* ---------- 首页 Banner ---------- */
.home-banner {
  height: 560px;
  background: #1f3b5c;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
}
.home-banner-bg { position: absolute; inset: 0; background: #1f3b5c; }
.home-banner-bg::before {
  content: "";
  position: absolute;
  right: -80px;
  top: -120px;
  width: 620px;
  height: 620px;
  background: #14293f;
  border-radius: 50%;
}
.home-banner-bg::after {
  content: "";
  position: absolute;
  right: 160px;
  bottom: -160px;
  width: 420px;
  height: 420px;
  border: 46px solid #b8915a;
  border-radius: 50%;
  opacity: 0.18;
}
.home-banner .public-width { position: relative; z-index: 2; }
.home-banner-content { max-width: 720px; }
.home-banner-tag {
  display: inline-block;
  background: #b8915a;
  color: #ffffff;
  font-size: 14px;
  padding: 6px 18px;
  letter-spacing: 2px;
  border-radius: 3px;
}
.home-banner-content h2 {
  font-size: 52px;
  color: #ffffff;
  letter-spacing: 4px;
  margin: 26px 0 18px 0;
  font-weight: 700;
  line-height: 1.3;
}
.home-banner-content h2 em { font-style: normal; color: #e6d3b3; }
.home-banner-content p {
  font-size: 18px;
  color: #cdd6e0;
  letter-spacing: 1px;
  line-height: 1.9;
  margin-bottom: 36px;
}
.home-banner-btn { display: flex; }
.home-banner-btn a {
  display: inline-block;
  padding: 13px 40px;
  font-size: 16px;
  border-radius: 3px;
  letter-spacing: 1px;
  transition: all 0.25s;
}
.banner-btn-primary { background: #b8915a; color: #ffffff; margin-right: 20px; }
.banner-btn-primary:hover { background: #a07c48; }
.banner-btn-ghost { background: transparent; color: #ffffff; border: 1px solid #ffffff; }
.banner-btn-ghost:hover { border-color: #b8915a; color: #b8915a; }
.home-banner-stats {
  display: flex;
  margin-top: 46px;
  border-top: 1px solid rgba(255,255,255,0.18);
  padding-top: 26px;
}
.home-banner-stats .stat-item { margin-right: 60px; }
.home-banner-stats .stat-num { font-size: 30px; color: #e6d3b3; font-weight: 700; }
.home-banner-stats .stat-label { font-size: 13px; color: #9fb0c4; letter-spacing: 1px; margin-top: 4px; }

/* ---------- 首页产品分类导航条 ---------- */
.home-cat { background: #ffffff; border-bottom: 1px solid #ece7de; }
.home-cat-box { display: flex; justify-content: space-between; padding: 30px 0; }
.home-cat-item {
  flex: 1;
  text-align: center;
  padding: 26px 10px;
  border-right: 1px solid #f0ece4;
  transition: background 0.25s;
  cursor: pointer;
}
.home-cat-item:last-child { border-right: none; }
.home-cat-item:hover { background: #f7f5f1; }
.home-cat-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 14px auto;
  background: #f0ece4;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: #1f3b5c;
  transition: all 0.25s;
}
.home-cat-item:hover .home-cat-icon { background: #b8915a; color: #ffffff; }
.home-cat-item h4 { font-size: 16px; color: #26282b; font-weight: 600; }
.home-cat-item p { font-size: 12px; color: #9c9c9c; margin-top: 4px; }

/* ---------- 首页公司简介 ---------- */
.home-about { background: #f7f5f1; }
.home-about-box { display: flex; padding: 60px 0; align-items: center; }
.home-about-img { width: 520px; height: 360px; background: #1f3b5c; border-radius: 6px; position: relative; flex-shrink: 0; overflow: hidden; }
.home-about-img img { width: 100%; height: 100%; object-fit: cover; display: block; }
.home-about-content { padding-left: 60px; flex: 1; }
.home-about-content h3 { font-size: 30px; color: #1f3b5c; letter-spacing: 2px; }
.home-about-content .about-line { width: 40px; height: 3px; background: #b8915a; margin: 16px 0 22px 0; }
.home-about-content p { font-size: 15px; color: #555a60; line-height: 2; margin-bottom: 14px; }
.home-about-points { display: flex; flex-wrap: wrap; margin: 10px 0 26px 0; }
.home-about-points li { width: 50%; font-size: 14px; color: #26282b; padding: 6px 0; }
.home-about-points li::before { content: "◆"; color: #b8915a; margin-right: 10px; font-size: 11px; }
.about-btn {
  display: inline-block;
  padding: 12px 36px;
  background: #1f3b5c;
  color: #ffffff;
  font-size: 15px;
  border-radius: 3px;
  letter-spacing: 1px;
  transition: background 0.25s;
}
.about-btn:hover { background: #b8915a; }

/* ---------- 首页产品展示 ---------- */
.home-product { background: #ffffff; }
.home-product-list { display: flex; padding-bottom: 20px; }
.home-product-card {
  flex: 1;
  margin-right: 25px;
  background: #ffffff;
  border: 1px solid #ece7de;
  border-radius: 6px;
  overflow: hidden;
  transition: all 0.3s;
}
.home-product-card:last-child { margin-right: 0; }
.home-product-card:hover { box-shadow: 0 10px 28px rgba(31,59,92,0.12); transform: translateY(-5px); }
.home-product-img { height: 220px; position: relative; display: flex; align-items: center; justify-content: center; }
.home-product-img span { font-size: 24px; color: #ffffff; letter-spacing: 3px; font-weight: 600; }
.home-product-img.p-1 { background: #1f3b5c; }
.home-product-img.p-2 { background: #2c4a6e; }
.home-product-img.p-3 { background: #3a5a80; }
.home-product-img.p-4 { background: #14293f; }
.home-product-img.p-5 { background: #4a6a90; }
.home-product-tag {
  position: absolute;
  left: 0;
  top: 16px;
  z-index: 2;
  background: #b8915a;
  color: #ffffff;
  font-size: 12px;
  padding: 4px 14px;
  letter-spacing: 1px;
}
.home-product-info { padding: 20px 22px; }
.home-product-info h4 { font-size: 18px; color: #1f3b5c; font-weight: 600; }
.home-product-info p { font-size: 13px; color: #8a8e94; margin: 8px 0 14px 0; line-height: 1.8; }
.home-product-more { font-size: 14px; color: #b8915a; letter-spacing: 1px; }
.home-product-more::after { content: "→"; margin-left: 6px; }

/* ---------- 首页核心优势 ---------- */
.home-adv { background: #1f3b5c; }
.home-adv .page-title h3 { color: #ffffff; }
.home-adv .page-title .page-title-en { color: #b8915a; }
.home-adv-list { display: flex; padding-bottom: 64px; }
.home-adv-item { flex: 1; text-align: center; padding: 0 30px; }
.home-adv-num {
  font-size: 46px;
  color: #b8915a;
  font-weight: 700;
  font-family: Georgia, serif;
  line-height: 1;
}
.home-adv-item h4 { font-size: 19px; color: #ffffff; margin: 16px 0 10px 0; letter-spacing: 1px; }
.home-adv-item p { font-size: 13px; color: #9fb0c4; line-height: 1.9; }

/* ---------- 首页应用场景 ---------- */
.home-scene { background: #f7f5f1; }
.home-scene-list { display: flex; padding-bottom: 60px; }
.home-scene-item {
  flex: 1;
  margin-right: 26px;
  background: #ffffff;
  border-radius: 6px;
  overflow: hidden;
  transition: transform 0.3s;
}
.home-scene-item:last-child { margin-right: 0; }
.home-scene-item:hover { transform: translateY(-5px); }
.home-scene-img { height: 170px; display: flex; align-items: center; justify-content: center; background: #e8e2d6; }
.home-scene-img span { font-size: 22px; color: #1f3b5c; letter-spacing: 2px; font-weight: 600; }
.home-scene-item h4 { text-align: center; font-size: 16px; color: #26282b; padding: 18px 0; font-weight: 600; }

/* ---------- 首页工程案例 + 新闻 ---------- */
.home-case { background: #ffffff; }
.home-case-box { display: flex; padding-bottom: 60px; }
.home-case-main { width: 660px; margin-right: 40px; }
.home-case-main .case-img {
  height: 360px;
  background: #2c4a6e;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.home-case-main .case-img span { color: #e6d3b3; font-size: 24px; letter-spacing: 3px; }
.home-case-main h4 { font-size: 19px; color: #1f3b5c; margin: 18px 0 10px 0; }
.home-case-main p { font-size: 14px; color: #8a8e94; line-height: 1.9; }
.home-case-side { flex: 1; }
.home-case-side-item { display: flex; padding: 16px 0; border-bottom: 1px solid #f0ece4; align-items: center; }
.home-case-side-img { width: 130px; height: 90px; border-radius: 4px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; }
.home-case-side-img span { color: #ffffff; font-size: 14px; letter-spacing: 1px; }
.home-case-side-item:nth-child(1) .home-case-side-img { background: #3a5a80; }
.home-case-side-item:nth-child(2) .home-case-side-img { background: #14293f; }
.home-case-side-item:nth-child(3) .home-case-side-img { background: #4a6a90; }
.home-case-side-item:nth-child(4) .home-case-side-img { background: #5a7ba0; }
.home-case-side-info { padding-left: 18px; }
.home-case-side-info h5 { font-size: 15px; color: #26282b; font-weight: 600; }
.home-case-side-info p { font-size: 13px; color: #9c9c9c; margin-top: 4px; }

.home-news-box { display: flex; padding-bottom: 60px; }
.home-news-left { width: 460px; margin-right: 40px; }
.home-news-left .news-feature {
  height: 260px;
  background: #14293f;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.home-news-left .news-feature span { color: #e6d3b3; font-size: 20px; letter-spacing: 3px; }
.home-news-left h4 { font-size: 18px; color: #1f3b5c; margin: 16px 0 8px 0; }
.home-news-left h4 a { color: inherit; transition: color 0.25s; }
.home-news-left h4 a:hover { color: #b8915a; }
.home-news-left p { font-size: 13px; color: #8a8e94; }
.home-news-right { flex: 1; }
.home-news-right li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
  border-bottom: 1px solid #f0ece4;
}
.home-news-right li a { font-size: 15px; color: #33373d; transition: color 0.25s; flex: 1; padding-right: 20px; }
.home-news-right li a:hover { color: #b8915a; }
.home-news-right li span { font-size: 13px; color: #9c9c9c; }

/* ---------- 首页联系我们 ---------- */
.home-contact { background: #f7f5f1; }
.home-contact-box { display: flex; padding-bottom: 64px; }
.home-contact-info { flex: 1; padding-right: 60px; }
.home-contact-info h3 { font-size: 26px; color: #1f3b5c; letter-spacing: 1px; }
.home-contact-info p { font-size: 15px; color: #555a60; margin: 18px 0 26px 0; line-height: 1.9; }
.home-contact-info li { font-size: 15px; color: #33373d; padding: 8px 0; }
.home-contact-info li b { color: #b8915a; margin-right: 12px; font-weight: 600; }
.home-contact-qr {
  width: 500px;
  flex-shrink: 0;
  text-align: center;
  background: #ffffff;
  border-radius: 6px;
  padding: 30px 20px;
  border: 1px solid #ece7de;
}
.home-contact-qr h5 { font-size: 18px; color: #1f3b5c; }
.home-contact-qr .qr-tip { font-size: 13px; color: #9c9c9c; margin-top: 6px; }
.qr-list { display: flex; justify-content: space-between; margin-top: 22px; }
.qr-item { width: 140px; }
.qr-img { width: 120px; height: 120px; margin: 0 auto; border: 1px solid #ece7de; border-radius: 4px; overflow: hidden; background: #ffffff; }
.qr-img img { width: 100%; height: 100%; object-fit: cover; display: block; }
.qr-item h6 { font-size: 15px; color: #1f3b5c; margin-top: 10px; }
.qr-item p { font-size: 12px; color: #9c9c9c; margin-top: 4px; line-height: 1.5; word-break: break-all; }

/* ---------- 内页 Banner ---------- */
.ny-banner {
  height: 260px;
  background: #1f3b5c;
  position: relative;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.ny-banner::before {
  content: "";
  position: absolute;
  right: -60px;
  top: -100px;
  width: 420px;
  height: 420px;
  background: #14293f;
  border-radius: 50%;
}
.ny-banner::after {
  content: "";
  position: absolute;
  right: 120px;
  bottom: -120px;
  width: 280px;
  height: 280px;
  border: 30px solid #b8915a;
  border-radius: 50%;
  opacity: 0.16;
}
.ny-banner .public-width { position: relative; z-index: 2; }
.ny-banner h2 { font-size: 38px; color: #ffffff; letter-spacing: 4px; font-weight: 700; }
.ny-banner .ny-banner-en { font-size: 14px; color: #b8915a; letter-spacing: 5px; text-transform: uppercase; margin-top: 10px; }

/* ---------- 内页面包屑 ---------- */
.ny-nav { background: #ffffff; border-bottom: 1px solid #ece7de; }
.ny-nav-box { display: flex; justify-content: space-between; align-items: center; height: 58px; }
.ny-nav-crumb { font-size: 14px; color: #9c9c9c; }
.ny-nav-crumb a { color: #9c9c9c; }
.ny-nav-crumb a:hover { color: #b8915a; }
.ny-nav-crumb b { color: #1f3b5c; font-weight: 600; }

/* ---------- 内页通用内容块 ---------- */
.ny-content { padding: 60px 0 70px 0; background: #ffffff; }
.ny-content-gray { padding: 60px 0 70px 0; background: #f7f5f1; }
.detail-block { margin-bottom: 60px; }
.detail-block:last-child { margin-bottom: 0; }

/* ---------- 关于我们 ---------- */
.about-company { display: flex; }
.about-company-img { width: 560px; flex-shrink: 0; }
.about-company-img .big-img {
  height: 360px;
  background: #1f3b5c;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.about-company-img .big-img span { color: #e6d3b3; font-size: 24px; letter-spacing: 3px; }
.about-company-img .small-imgs { display: flex; margin-top: 20px; }
.about-company-img .small-imgs div { flex: 1; height: 120px; margin-right: 20px; border-radius: 4px; display: flex; align-items: center; justify-content: center; }
.about-company-img .small-imgs div:last-child { margin-right: 0; }
.about-company-img .small-imgs div span { color: #ffffff; font-size: 14px; letter-spacing: 1px; }
.about-company-img .s-img-1 { background: #2c4a6e; }
.about-company-img .s-img-2 { background: #b8915a; }
.about-company-text { flex: 1; padding-left: 56px; }
.about-company-text h3 { font-size: 28px; color: #1f3b5c; letter-spacing: 1px; }
.about-company-text .about-line { width: 40px; height: 3px; background: #b8915a; margin: 16px 0 22px 0; }
.about-company-text p { font-size: 15px; color: #555a60; line-height: 2.1; margin-bottom: 16px; }
.about-company-text p b { color: #1f3b5c; }

.about-info-grid { display: flex; flex-wrap: wrap; margin-top: 40px; background: #f7f5f1; border-radius: 6px; padding: 30px 20px; }
.about-info-grid li { width: 25%; padding: 14px 20px; }
.about-info-grid li b { display: block; font-size: 13px; color: #9c9c9c; font-weight: 400; letter-spacing: 1px; }
.about-info-grid li span { font-size: 16px; color: #1f3b5c; font-weight: 600; }

/* 发展历程 */
.about-history { background: #f7f5f1; padding: 60px 0; }
.about-history-box { display: flex; }
.about-history-item { flex: 1; text-align: center; position: relative; padding: 0 24px; }
.about-history-item .history-dot {
  width: 16px;
  height: 16px;
  background: #b8915a;
  border-radius: 50%;
  margin: 0 auto 18px auto;
  border: 4px solid #e8e0d2;
}
.about-history-item .history-year { font-size: 20px; color: #1f3b5c; font-weight: 700; }
.about-history-item h4 { font-size: 16px; color: #26282b; margin: 8px 0; font-weight: 600; }
.about-history-item p { font-size: 13px; color: #8a8e94; line-height: 1.9; }

/* 企业文化 */
.about-culture { background: #ffffff; }
.about-culture-list { display: flex; padding-bottom: 60px; }
.about-culture-item { flex: 1; margin-right: 30px; background: #f7f5f1; border-radius: 6px; padding: 40px 30px; text-align: center; transition: all 0.3s; }
.about-culture-item:last-child { margin-right: 0; }
.about-culture-item:hover { background: #1f3b5c; }
.about-culture-item:hover h4 { color: #e6d3b3; }
.about-culture-item:hover p { color: #cdd6e0; }
.about-culture-icon { width: 60px; height: 60px; margin: 0 auto 20px auto; background: #b8915a; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 26px; color: #ffffff; }
.about-culture-item h4 { font-size: 19px; color: #1f3b5c; margin-bottom: 12px; transition: color 0.3s; }
.about-culture-item p { font-size: 13px; color: #8a8e94; line-height: 1.9; transition: color 0.3s; }

/* ---------- 产品中心 ---------- */
.product-filter { display: flex; justify-content: center; padding-bottom: 40px; flex-wrap: wrap; }
.product-filter a {
  padding: 10px 28px;
  margin: 0 8px;
  font-size: 15px;
  color: #555a60;
  border-radius: 30px;
  transition: all 0.25s;
  border: 1px solid #e0dbd0;
}
.product-filter a:hover { color: #1f3b5c; border-color: #1f3b5c; }
.product-filter a.active { background: #1f3b5c; color: #ffffff; border-color: #1f3b5c; }

.product-list { display: flex; flex-wrap: wrap; }
.product-card {
  width: 440px;
  margin-right: 40px;
  margin-bottom: 44px;
  background: #ffffff;
  border: 1px solid #ece7de;
  border-radius: 6px;
  overflow: hidden;
  transition: all 0.3s;
}
.product-card:nth-child(3n) { margin-right: 0; }
.product-card:hover { box-shadow: 0 12px 30px rgba(31,59,92,0.14); transform: translateY(-5px); }
.product-card-img { height: 260px; display: flex; align-items: center; justify-content: center; position: relative; }
.product-card-img span { font-size: 24px; color: #ffffff; letter-spacing: 3px; font-weight: 600; }
.product-card-img.p-1 { background: #1f3b5c; }
.product-card-img.p-2 { background: #2c4a6e; }
.product-card-img.p-3 { background: #3a5a80; }
.product-card-img.p-4 { background: #14293f; }
.product-card-img.p-5 { background: #4a6a90; }
.product-card-body { padding: 24px 26px; }
.product-card-body h4 { font-size: 20px; color: #1f3b5c; font-weight: 600; }
.product-card-body .product-desc { font-size: 13px; color: #8a8e94; margin: 10px 0 16px 0; line-height: 1.9; }
.product-card-body .product-tags { display: flex; flex-wrap: wrap; }
.product-card-body .product-tags span {
  font-size: 12px;
  color: #b8915a;
  background: #f7f5f1;
  padding: 4px 12px;
  border-radius: 3px;
  margin: 0 10px 8px 0;
}

/* 产品详情通用 */
.product-detail { display: flex; }
.product-detail-img { width: 520px; flex-shrink: 0; }
.product-detail-img .detail-big { height: 380px; border-radius: 6px; display: flex; align-items: center; justify-content: center; background: #1f3b5c; }
.product-detail-img .detail-big span { color: #e6d3b3; font-size: 26px; letter-spacing: 3px; }
.product-detail-text { flex: 1; padding-left: 56px; }
.product-detail-text h3 { font-size: 28px; color: #1f3b5c; }
.product-detail-text .detail-en { font-size: 13px; color: #b8915a; letter-spacing: 3px; text-transform: uppercase; margin: 6px 0 20px 0; }
.product-detail-text p { font-size: 15px; color: #555a60; line-height: 2.1; margin-bottom: 16px; }
.product-detail-spec { background: #f7f5f1; border-radius: 6px; padding: 20px 26px; margin-top: 10px; }
.product-detail-spec li { font-size: 14px; color: #33373d; padding: 6px 0; }
.product-detail-spec li b { color: #b8915a; margin-right: 12px; }

/* ---------- 工程案例 ---------- */
.case-tabs { display: flex; justify-content: center; padding-bottom: 40px; }
.case-tabs a { padding: 10px 30px; margin: 0 8px; font-size: 15px; color: #555a60; border: 1px solid #e0dbd0; border-radius: 30px; transition: all 0.25s; }
.case-tabs a:hover { color: #1f3b5c; border-color: #1f3b5c; }
.case-tabs a.active { background: #1f3b5c; color: #ffffff; border-color: #1f3b5c; }
.case-list { display: flex; flex-wrap: wrap; }
.case-card {
  width: 440px;
  margin-right: 40px;
  margin-bottom: 44px;
  background: #ffffff;
  border: 1px solid #ece7de;
  border-radius: 6px;
  overflow: hidden;
  transition: all 0.3s;
}
.case-card:nth-child(3n) { margin-right: 0; }
.case-card:hover { box-shadow: 0 12px 30px rgba(31,59,92,0.14); transform: translateY(-5px); }
.case-card-img { height: 260px; display: flex; align-items: center; justify-content: center; }
.case-card-img span { font-size: 20px; color: #ffffff; letter-spacing: 2px; }
.case-card-img.c-1 { background: #1f3b5c; }
.case-card-img.c-2 { background: #2c4a6e; }
.case-card-img.c-3 { background: #3a5a80; }
.case-card-img.c-4 { background: #14293f; }
.case-card-img.c-5 { background: #4a6a90; }
.case-card-img.c-6 { background: #5a7ba0; }
.case-card-body { padding: 22px 26px; }
.case-card-body h4 { font-size: 18px; color: #1f3b5c; font-weight: 600; }
.case-card-body p { font-size: 13px; color: #8a8e94; margin: 8px 0; line-height: 1.8; }
.case-card-body .case-meta { font-size: 12px; color: #b8915a; }

/* ---------- 新闻动态 ---------- */
.news-list { max-width: 1080px; margin: 0 auto; }
.news-item { display: flex; padding: 26px 0; border-bottom: 1px solid #f0ece4; }
.news-item-date { width: 90px; flex-shrink: 0; text-align: center; background: #f7f5f1; border-radius: 4px; padding: 14px 0; height: 78px; }
.news-item-date .day { font-size: 28px; color: #1f3b5c; font-weight: 700; line-height: 1; }
.news-item-date .ym { font-size: 12px; color: #b8915a; margin-top: 6px; letter-spacing: 1px; }
.news-item-body { flex: 1; padding-left: 26px; }
.news-item-body h4 { font-size: 18px; color: #26282b; font-weight: 600; }
.news-item-body h4 a { color: inherit; transition: color 0.25s; }
.news-item-body h4 a:hover { color: #b8915a; }
.news-item-body p { font-size: 14px; color: #8a8e94; margin-top: 8px; line-height: 1.8; }

/* ---------- 联系我们 ---------- */
.contact-info-row { display: flex; padding-bottom: 40px; }
.contact-card { flex: 1; margin-right: 30px; background: #f7f5f1; border-radius: 6px; padding: 36px 30px; text-align: center; transition: all 0.3s; }
.contact-card:last-child { margin-right: 0; }
.contact-card:hover { background: #1f3b5c; }
.contact-card:hover h4 { color: #e6d3b3; }
.contact-card:hover p { color: #cdd6e0; }
.contact-card-icon { width: 58px; height: 58px; margin: 0 auto 18px auto; background: #b8915a; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 24px; color: #ffffff; }
.contact-card h4 { font-size: 18px; color: #1f3b5c; margin-bottom: 10px; transition: color 0.3s; }
.contact-card p { font-size: 14px; color: #555a60; line-height: 1.9; transition: color 0.3s; }

.contact-main { display: flex; }
.contact-form-box { flex: 1; padding-right: 50px; }
.contact-form-box h3 { font-size: 24px; color: #1f3b5c; margin-bottom: 24px; }
.contact-form-row { display: flex; margin-bottom: 20px; }
.contact-form-row .form-item { flex: 1; margin-right: 20px; }
.contact-form-row .form-item:last-child { margin-right: 0; }
.contact-form-box label { display: block; font-size: 14px; color: #33373d; margin-bottom: 8px; }
.contact-form-box input, .contact-form-box textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid #e0dbd0;
  border-radius: 4px;
  font-size: 14px;
  color: #26282b;
  background: #fbfaf8;
  transition: border-color 0.25s;
}
.contact-form-box input:focus, .contact-form-box textarea:focus { border-color: #b8915a; background: #ffffff; }
.contact-form-box textarea { height: 140px; resize: vertical; }
.contact-submit {
  padding: 13px 48px;
  background: #1f3b5c;
  color: #ffffff;
  font-size: 16px;
  border-radius: 3px;
  letter-spacing: 2px;
  cursor: pointer;
  transition: background 0.25s;
}
.contact-submit:hover { background: #b8915a; }
.contact-side { width: 420px; flex-shrink: 0; }
.contact-map {
  height: 280px;
  background: #e8e2d6;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}
.contact-map span { color: #1f3b5c; font-size: 18px; letter-spacing: 2px; }
.contact-map small { color: #9c9c9c; font-size: 12px; margin-top: 8px; }
.contact-side-list { margin-top: 24px; background: #f7f5f1; border-radius: 6px; padding: 24px 26px; }
.contact-side-list li { font-size: 14px; color: #33373d; padding: 8px 0; line-height: 1.8; }
.contact-side-list li b { color: #b8915a; margin-right: 10px; font-weight: 600; }
.contact-side-list li a { color: #b8915a; transition: color 0.25s; }
.contact-side-list li a:hover { color: #1f3b5c; }
.contact-qr-box { margin-top: 24px; background: #ffffff; border: 1px solid #ece7de; border-radius: 6px; padding: 24px 20px; }
.contact-qr-box h5 { font-size: 16px; color: #1f3b5c; text-align: center; }
.contact-qr-box .qr-list { margin-top: 16px; }
.contact-qr-box .qr-item { width: 110px; }
.contact-qr-box .qr-img { width: 96px; height: 96px; }

/* 留言提示 */
.form-msg { padding: 12px 16px; border-radius: 4px; font-size: 14px; margin-bottom: 16px; }
.form-msg-success { background: #e8f5e9; color: #2e7d32; }
.form-msg-error { background: #fdecea; color: #c0392b; }

/* ---------- 页脚 ---------- */
.footer { background: #14293f; color: #9fb0c4; }
.footer-main { display: flex; padding: 56px 0 40px 0; }
.footer-left { width: 420px; margin-right: 60px; }
.footer-logo { display: flex; align-items: center; margin-bottom: 18px; }
.footer-logo h2 { font-size: 22px; color: #ffffff; letter-spacing: 2px; }
.footer-left p { font-size: 13px; line-height: 2; }
.footer-center { flex: 1; }
.footer-center h4, .footer-right h4 { font-size: 17px; color: #ffffff; margin-bottom: 22px; letter-spacing: 1px; font-weight: 600; }
.footer-center ul { display: flex; flex-wrap: wrap; }
.footer-center ul li { width: 50%; font-size: 14px; padding: 7px 0; }
.footer-center ul li a { color: #9fb0c4; transition: color 0.25s; }
.footer-center ul li a:hover { color: #b8915a; }
.footer-right { width: 320px; flex-shrink: 0; }
.footer-right li { font-size: 14px; padding: 7px 0; line-height: 1.8; }
.footer-right li b { color: #b8915a; margin-right: 8px; }
.footer-copyright {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: #7a8ca0;
}

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed;
  right: 30px;
  bottom: 60px;
  width: 46px;
  height: 46px;
  background: #1f3b5c;
  color: #ffffff;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
}
.back-top.show { opacity: 1; visibility: visible; }
.back-top:hover { background: #b8915a; }

/* ============================================================
   响应式断点（桌面优先，覆盖规则统一放文件末尾）
   ============================================================ */

@media (max-width: 1440px) {
  .public-width { width: 1200px; }
  .product-card, .case-card { width: 373px; }
}

@media (max-width: 1200px) {
  .public-width { width: 960px; }
  .home-banner-content h2 { font-size: 42px; }
  .home-about-img { width: 420px; }
  .home-case-main { width: 520px; }
  .home-news-left { width: 380px; }
  .product-card, .case-card { width: 296px; margin-right: 36px; }
  .about-info-grid li { width: 50%; }
  .about-company-img { width: 460px; }
}

@media (max-width: 992px) {
  .public-width { width: 90%; }
  .header { position: relative; }
  .header-box {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #ffffff;
    border-bottom: 1px solid #ece7de;
    z-index: 100;
  }
  .header-box.show { display: block; }
  .header-box .nav #menu { display: block; flex-direction: column; width: 100%; }
  .header-box .nav #menu li { margin: 0; }
  .header-box .nav #menu li a { height: auto; line-height: 52px; border-bottom: 1px solid #f0ece4; }
  .header-box .nav #menu li a::after { display: none; }
  .nav-toggle { display: block; font-size: 26px; color: #1f3b5c; cursor: pointer; background: none; border: none; }
  .home-banner { height: auto; padding: 70px 0; }
  .home-cat-box { flex-wrap: wrap; }
  .home-cat-item { flex: 1 1 33%; border-bottom: 1px solid #f0ece4; }
  .home-about-box { flex-direction: column; align-items: stretch; }
  .home-about-img { width: 100%; }
  .home-about-content { padding-left: 0; padding-top: 30px; }
  .home-adv-list { flex-wrap: wrap; }
  .home-adv-item { flex: 1 1 50%; padding: 20px; }
  .home-scene-list { flex-wrap: wrap; }
  .home-scene-item { flex: 1 1 45%; margin: 0 4% 24px 0; }
  .home-product-list { flex-wrap: wrap; justify-content: space-between; }
  .home-product-card { flex: 0 0 48%; margin-right: 0; margin-bottom: 30px; }
  .home-case-box { flex-direction: column; }
  .home-case-main { width: 100%; margin-right: 0; }
  .home-news-box { flex-direction: column; }
  .home-news-left { width: 100%; margin-right: 0; margin-bottom: 20px; }
  .home-contact-box { flex-direction: column; }
  .home-contact-info { padding-right: 0; padding-bottom: 30px; }
  .home-contact-qr { width: 100%; }
  .product-card, .case-card { width: 100%; margin-right: 0; }
  .product-detail, .contact-main { flex-direction: column; }
  .product-detail-img, .contact-form-box, .contact-side { width: 100%; padding-left: 0; padding-right: 0; }
  .product-detail-text { padding-left: 0; padding-top: 30px; }
  .contact-side { margin-top: 40px; }
  .about-company, .about-history-box, .about-culture-list { flex-direction: column; }
  .about-company-img, .about-company-text { width: 100%; padding-left: 0; }
  .about-company-text { padding-top: 30px; }
  .about-history-item { padding: 20px 0; }
  .about-culture-item { margin-right: 0; margin-bottom: 20px; }
  .footer-main { flex-wrap: wrap; }
  .footer-left { width: 100%; margin-right: 0; margin-bottom: 30px; }
}

@media (max-width: 768px) {
  .public-width { width: 94%; }
  .topbar-left span { margin-right: 12px; font-size: 12px; }
  .home-banner-content h2 { font-size: 34px; }
  .home-banner-stats { flex-wrap: wrap; }
  .home-banner-stats .stat-item { margin-right: 30px; margin-bottom: 14px; }
  .home-product-card { flex: 0 0 100%; margin-right: 0; }
  .home-cat-item { flex: 1 1 50%; }
  .home-adv-item { flex: 1 1 100%; }
  .home-scene-item { flex: 1 1 100%; margin-right: 0; }
  .about-info-grid li { width: 100%; }
  .news-item { flex-direction: column; }
  .news-item-date { width: 100%; margin-bottom: 14px; height: auto; display: flex; align-items: center; justify-content: center; gap: 12px; }
  .news-item-body { padding-left: 0; }
  .contact-form-row { flex-direction: column; }
  .contact-form-row .form-item { margin-right: 0; margin-bottom: 16px; }
  .contact-card { margin-right: 0; margin-bottom: 16px; }
  .contact-info-row { flex-direction: column; }
  .footer-center ul li { width: 100%; }
}

@media (max-width: 480px) {
  .public-width { width: 96%; }
  .topbar-right .topbar-phone { display: none; }
  .home-banner-content h2 { font-size: 28px; }
  .home-cat-item { flex: 1 1 100%; border-right: none; }
}

/* ============================================================
   新闻详情页
   ============================================================ */
.news-detail-wrap { display: flex; align-items: flex-start; }
.news-detail-main { flex: 1; background: #ffffff; border: 1px solid #ece7de; border-radius: 6px; padding: 40px 48px; }
.news-detail-head { border-bottom: 1px solid #f0ece4; padding-bottom: 24px; margin-bottom: 30px; }
.news-detail-head h3 { font-size: 26px; color: #1f3b5c; line-height: 1.5; }
.news-detail-meta { margin-top: 14px; font-size: 13px; color: #9c9c9c; }
.news-detail-meta span { margin-right: 24px; }
.news-detail-content { font-size: 15px; color: #3a3f45; line-height: 2; }
.news-detail-content p { margin-bottom: 18px; }
.news-detail-content h3 { font-size: 19px; color: #1f3b5c; margin: 24px 0 12px 0; }
.news-detail-content h4 { font-size: 17px; color: #1f3b5c; margin: 20px 0 10px 0; }
.news-detail-content img { max-width: 100%; height: auto; border-radius: 4px; margin: 12px 0; }
.news-detail-content ul, .news-detail-content ol { padding-left: 24px; margin-bottom: 18px; }
.news-detail-content li { margin-bottom: 6px; }
.news-detail-content blockquote { border-left: 3px solid #b8915a; background: #f7f5f1; padding: 12px 18px; margin: 16px 0; color: #666666; }
.news-detail-pager { display: flex; justify-content: space-between; border-top: 1px solid #f0ece4; margin-top: 40px; padding-top: 20px; }
.pager-item { max-width: 48%; }
.pager-item b { display: block; font-size: 13px; color: #9c9c9c; margin-bottom: 8px; font-weight: 400; }
.pager-item a { font-size: 14px; color: #33373d; transition: color 0.25s; line-height: 1.6; }
.pager-item a:hover { color: #b8915a; }
.pager-item span { font-size: 14px; color: #c0c0c0; }
.pager-next { text-align: right; }
.news-detail-back { margin-top: 24px; }
.news-detail-back a { font-size: 14px; color: #b8915a; }
.news-detail-back a:hover { color: #1f3b5c; }

.news-detail-side { width: 320px; flex-shrink: 0; margin-left: 40px; }
.side-block { background: #ffffff; border: 1px solid #ece7de; border-radius: 6px; padding: 24px; margin-bottom: 20px; }
.side-block h4 { font-size: 16px; color: #1f3b5c; padding-bottom: 12px; border-bottom: 1px solid #f0ece4; margin-bottom: 16px; }
.side-news-list li { display: flex; justify-content: space-between; align-items: center; padding: 10px 0; border-bottom: 1px dashed #f0ece4; }
.side-news-list li:last-child { border-bottom: none; }
.side-news-list li a { flex: 1; font-size: 13px; color: #33373d; line-height: 1.5; padding-right: 12px; transition: color 0.25s; }
.side-news-list li a:hover { color: #b8915a; }
.side-news-list li a.on { color: #b8915a; font-weight: 600; }
.side-news-list li span { font-size: 12px; color: #9c9c9c; white-space: nowrap; }
.side-contact p { font-size: 13px; color: #8a8e94; line-height: 1.8; margin-bottom: 12px; }
.side-contact ul li { font-size: 13px; color: #33373d; padding: 5px 0; }

.empty-tip { text-align: center; color: #9c9c9c; padding: 60px 0; font-size: 15px; }

@media (max-width: 900px) {
  .news-detail-wrap { flex-direction: column; }
  .news-detail-side { width: 100%; margin-left: 0; margin-top: 24px; }
}