/* ==========================================================================
   东邦鸿官网 — 在 Industrix 模板之上的中文化与定制层
   加载顺序必须在 bootstrap.min.css 与 style.css 之后
   页面由 build/build.py 生成，改文案去 build/content.py
   ========================================================================== */

:root{
  --dbh-primary:#f55b14;      /* 与 logo 的 DBH 橙椭圆一致 */
  --dbh-dark:#041332;
  --dbh-ink:#1d2432;
  --dbh-muted:#5a6472;
  --dbh-line:#e3e7ee;
  --dbh-sans:"PingFang SC","PingFang TC","HarmonyOS Sans SC","Source Han Sans SC",
             "Noto Sans CJK SC","Microsoft YaHei","Microsoft JhengHei","Hiragino Sans GB",
             system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
}

/* --------------------------------------------------------------------------
   字体：模板原用 Anton，该字体无中文字形，中文会掉字或回退到系统默认。
   整体换成中英通吃的黑体栈 + 加粗，保留原有的紧凑工业感。
   -------------------------------------------------------------------------- */
body{
  font-family:var(--dbh-sans);
  color:var(--dbh-ink);
  font-size:15px;
  line-height:1.8;
}

h1,.h1,h2,.h2,h3,.h3,h4,.h4,h5,.h5,h6,.h6,
.btn,.navbar .navbar-nav .nav-link{
  font-family:var(--dbh-sans);
  font-weight:700;
  letter-spacing:.5px;
}

/* 中文没有大小写，uppercase 只会让夹杂的英文变吵 */
h1,.h1,h2,.h2,h3,.h3,h4,.h4,h5,.h5,h6,.h6,
.btn,.navbar .navbar-nav .nav-link,.text-uppercase{
  text-transform:none !important;
}

/* 模板的 display-* 是按英文大写字母调的，中文要收一档否则撑破栅格 */
.display-1{font-size:3.5rem;line-height:1.22}
.display-3{font-size:2.1rem;line-height:1.4;letter-spacing:.5px}
.display-5{font-size:2.4rem}
@media (max-width:991.98px){
  .display-1{font-size:2.3rem}
  .display-3{font-size:1.6rem}
}

/* --------------------------------------------------------------------------
   顶栏 / 导航 / 语言切换
   -------------------------------------------------------------------------- */
.topbar-small{font-size:12.5px}

.navbar-brand img{height:44px;width:auto}
@media (max-width:575.98px){ .navbar-brand img{height:34px} }

.navbar .navbar-nav .nav-link{
  margin-right:22px;
  font-size:15px;
  padding:25px 0;
}
.navbar .navbar-nav .nav-link:hover,
.navbar .navbar-nav .nav-link.active{color:var(--dbh-primary)}

.navbar-phone .phone-label{font-size:12px;color:var(--dbh-muted);line-height:1.2}
.navbar-phone .phone-num{
  font-size:18px;font-weight:700;color:var(--dbh-primary);
  line-height:1.2;white-space:nowrap;
}

.lang-switch{display:inline-flex;gap:2px}
.lang-switch .lang-item{
  display:inline-block;
  padding:1px 9px;
  font-size:12.5px;
  color:rgba(255,255,255,.62);
  text-decoration:none;
  border:1px solid transparent;
  transition:.2s;
}
.lang-switch .lang-item:hover{color:#fff}
.lang-switch .lang-item.active{
  color:#fff;background:var(--dbh-primary);border-color:var(--dbh-primary);
}
.lang-switch-mobile{border-top:1px solid var(--dbh-line);padding-top:16px}
.lang-switch-mobile .lang-item{color:var(--dbh-muted);border-color:var(--dbh-line)}
.lang-switch-mobile .lang-item:hover{color:var(--dbh-ink)}
.footer-lang{margin-top:18px}

/* --------------------------------------------------------------------------
   首屏
   模板原用 owl 轮播 + 1920x1080 素材图。手上只有 1:1 的产品实拍，
   直接铺满会严重变形，改成固定高度背景图 + 渐变遮罩，文字压左侧实色。
   -------------------------------------------------------------------------- */
.hero{
  position:relative;
  min-height:620px;height:80vh;max-height:800px;
  display:flex;align-items:center;overflow:hidden;
  background:var(--dbh-dark);
}
.hero-bg{
  position:absolute;inset:0;
  background:url("../img/fengye.jpg") no-repeat right center;
  background-size:cover;
}
.hero-scrim{
  position:absolute;inset:0;
  background:linear-gradient(100deg,
    rgba(4,19,50,.97) 0%, rgba(4,19,50,.93) 40%,
    rgba(4,19,50,.66) 66%, rgba(4,19,50,.44) 100%);
}
.hero-inner{position:relative;z-index:2}
.hero-eyebrow{
  color:var(--dbh-primary);
  font-size:14.5px;font-weight:700;letter-spacing:2px;margin-bottom:14px;
}
.hero-title{color:#fff;margin-bottom:20px;text-shadow:0 2px 24px rgba(0,0,0,.35)}
.hero-sub{
  color:rgba(255,255,255,.9);
  font-size:18px;font-weight:400;line-height:1.75;
  margin-bottom:34px;max-width:720px;
}
.hero .btn{margin-bottom:10px}   /* 窄屏两个按钮换行后不至于贴在一起 */
.hero-vals{
  display:flex;flex-wrap:wrap;gap:10px 26px;
  margin-top:34px;padding-top:24px;
  border-top:1px solid rgba(255,255,255,.18);
}
.hero-vals span{color:rgba(255,255,255,.82);font-size:14.5px}
.hero-vals i{color:var(--dbh-primary);margin-right:8px}
@media (max-width:991.98px){
  .hero{height:auto;min-height:0;padding:70px 0 60px}
  .hero-sub{font-size:16px}
}

/* --------------------------------------------------------------------------
   区块标题
   -------------------------------------------------------------------------- */
.sec-eyebrow{
  color:var(--dbh-primary);font-weight:700;letter-spacing:2px;
  font-size:13.5px;margin-bottom:10px;
}
.sec-title{margin-bottom:14px}
.sec-lead{color:var(--dbh-muted);max-width:860px;margin-bottom:0}
.sec-head-light .sec-title{color:#fff}
.sec-head-light .sec-lead{color:rgba(255,255,255,.72)}

/* --------------------------------------------------------------------------
   失效场景卡
   -------------------------------------------------------------------------- */
.prob-card{
  background:#fff;border:1px solid var(--dbh-line);
  border-top:3px solid var(--dbh-primary);
  padding:30px 28px;height:100%;transition:.3s;
}
.prob-card:hover{box-shadow:0 14px 36px rgba(4,19,50,.11);transform:translateY(-3px)}
.prob-icon{
  width:52px;height:52px;display:flex;align-items:center;justify-content:center;
  background:rgba(245,91,20,.1);color:var(--dbh-primary);
  font-size:22px;margin-bottom:20px;
}
.prob-card h3{font-size:18px;margin-bottom:10px}
.prob-card p{color:var(--dbh-muted);font-size:14px;margin:0;line-height:1.75}

/* --------------------------------------------------------------------------
   电机剖面示意图
   -------------------------------------------------------------------------- */
.diag-wrap{background:var(--dbh-dark) !important}
.diag-key{
  display:flex;flex-wrap:wrap;gap:12px 30px;
  margin-bottom:26px;font-size:13.5px;color:rgba(255,255,255,.75);
}
.diag-key .sw{
  display:inline-block;width:14px;height:14px;margin-right:8px;
  vertical-align:-2px;border-radius:2px;
}
.diag-key .sw-plastic{background:var(--dbh-primary)}
.diag-key .sw-metal{background:#c8cfda}

.diag-canvas{
  background:#fff;padding:20px 16px;
  overflow-x:auto;-webkit-overflow-scrolling:touch;
}
.motor-svg{display:block;width:100%;min-width:820px;height:auto}

.diag-legend{
  list-style:none;margin:26px 0 0;padding:0;
  display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
  gap:12px 28px;
}
.diag-legend li{
  display:flex;align-items:center;
  color:rgba(255,255,255,.86);font-size:14.5px;
}
.diag-legend .lg-n{
  flex:0 0 auto;
  width:26px;height:26px;margin-right:12px;
  display:flex;align-items:center;justify-content:center;
  background:var(--dbh-primary);color:#fff;
  font-size:13px;font-weight:700;border-radius:50%;
}

/* --------------------------------------------------------------------------
   系统方案卡
   -------------------------------------------------------------------------- */
.sol-card2{
  background:#fff;border:1px solid var(--dbh-line);
  padding:30px 28px;height:100%;position:relative;transition:.3s;
}
.sol-card2:hover{border-color:var(--dbh-primary);box-shadow:0 14px 36px rgba(4,19,50,.1)}
.sol-n{
  position:absolute;top:22px;right:26px;
  font-size:34px;font-weight:700;color:rgba(4,19,50,.07);line-height:1;
}
.sol-card2 h3{font-size:18px;margin-bottom:20px;padding-right:50px}
.sol-row{margin-bottom:14px}
.sol-row:last-child{margin-bottom:0}
.sol-lbl{
  display:inline-block;margin-bottom:5px;
  font-size:11.5px;font-weight:700;letter-spacing:1px;
  color:var(--dbh-muted);
  border-left:3px solid var(--dbh-line);padding-left:8px;
}
.sol-lbl-key{border-left-color:var(--dbh-primary);color:var(--dbh-primary)}
.sol-row p{margin:0;font-size:13.8px;color:var(--dbh-muted);line-height:1.7}

/* --------------------------------------------------------------------------
   可靠性五维
   -------------------------------------------------------------------------- */
.rel-card{
  background:var(--dbh-dark);color:#fff;
  padding:32px 28px;height:100%;position:relative;
  overflow:hidden;transition:.3s;
}
.rel-card:hover{transform:translateY(-3px)}
.rel-card::after{
  content:"";position:absolute;left:0;bottom:0;
  width:100%;height:3px;background:var(--dbh-primary);
  transform:scaleX(0);transform-origin:left;transition:.35s;
}
.rel-card:hover::after{transform:scaleX(1)}
.rel-n{
  position:absolute;top:18px;right:24px;
  font-size:40px;font-weight:700;color:rgba(255,255,255,.07);line-height:1;
}
.rel-icon{
  width:54px;height:54px;display:flex;align-items:center;justify-content:center;
  background:var(--dbh-primary);color:#fff;font-size:22px;margin-bottom:20px;
}
.rel-card h3{font-size:17.5px;margin-bottom:10px;color:#fff}
.rel-card p{color:rgba(255,255,255,.72);font-size:13.8px;margin:0;line-height:1.75}

/* --------------------------------------------------------------------------
   协同开发步骤
   -------------------------------------------------------------------------- */
.step-card{
  background:#fff;border:1px solid var(--dbh-line);
  padding:28px 26px;height:100%;position:relative;transition:.3s;
}
.step-card:hover{border-color:var(--dbh-primary);box-shadow:0 14px 36px rgba(4,19,50,.1)}
.step-n{
  font-size:15px;font-weight:700;color:#fff;
  width:44px;height:44px;margin-bottom:18px;
  display:flex;align-items:center;justify-content:center;
  background:var(--dbh-primary);
}
.step-card h3{font-size:17px;margin-bottom:8px}
.step-card p{color:var(--dbh-muted);font-size:13.8px;margin:0;line-height:1.75}

/* --------------------------------------------------------------------------
   材料表
   -------------------------------------------------------------------------- */
.mat-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--dbh-line)}
.mat-table{width:100%;min-width:680px;border-collapse:collapse;background:#fff}
.mat-table th{
  background:var(--dbh-dark);color:#fff;
  font-size:14px;font-weight:700;
  padding:15px 20px;text-align:left;white-space:nowrap;
}
.mat-table td{
  padding:15px 20px;font-size:14px;color:var(--dbh-muted);
  border-top:1px solid var(--dbh-line);vertical-align:top;
}
.mat-table tbody tr:hover td{background:#fafbfd}
.mat-table .mat-name{
  color:var(--dbh-ink);font-weight:700;white-space:nowrap;
}

/* --------------------------------------------------------------------------
   功能件目录
   -------------------------------------------------------------------------- */
.prod-card{
  background:#fff;border:1px solid var(--dbh-line);
  height:100%;transition:.3s;overflow:hidden;
}
.prod-card:hover{
  border-color:var(--dbh-primary);
  box-shadow:0 12px 32px rgba(4,19,50,.12);
  transform:translateY(-3px);
}
.prod-thumb{position:relative;aspect-ratio:1/1;background:#eef1f5;overflow:hidden}
.prod-thumb img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .5s ease}
.prod-card:hover .prod-thumb img{transform:scale(1.06)}
.prod-body{padding:18px 20px}
.prod-body h3{font-size:16.5px;margin-bottom:4px}
.prod-body p{margin:0;font-size:13.5px;color:var(--dbh-muted);line-height:1.7}

/* 齿轮箱及配件暂无实拍图，用同尺寸图标卡占位，避免网格塌陷 */
.prod-thumb.no-photo{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  background:var(--dbh-dark);color:rgba(255,255,255,.55);
}
.prod-thumb.no-photo i{font-size:56px;color:var(--dbh-primary);margin-bottom:14px}
.prod-thumb.no-photo span{font-size:13px;letter-spacing:1px}

/* --------------------------------------------------------------------------
   应用领域
   -------------------------------------------------------------------------- */
.app-card{
  background:#fff;border:1px solid var(--dbh-line);
  padding:30px 16px;height:100%;text-align:center;transition:.3s;
}
.app-card:hover{
  border-color:var(--dbh-primary);
  box-shadow:0 12px 30px rgba(4,19,50,.1);
  transform:translateY(-3px);
}
.app-card i{display:block;font-size:32px;color:var(--dbh-primary);margin-bottom:14px}
.app-card span{font-size:15px;font-weight:700;color:var(--dbh-ink)}

/* --------------------------------------------------------------------------
   关于我们 / 使命愿景
   -------------------------------------------------------------------------- */
.mv{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:20px;margin-bottom:26px;
}
.mv-item{border-left:3px solid var(--dbh-primary);padding-left:16px}
.mv-lbl{
  display:block;margin-bottom:6px;
  font-size:12px;font-weight:700;letter-spacing:2px;color:var(--dbh-primary);
}
.mv-item p{margin:0;font-size:15px;font-weight:700;color:var(--dbh-ink);line-height:1.65}
.vals-wrap .mv-lbl{margin-bottom:10px}
.val-chip{
  display:inline-block;margin:0 8px 8px 0;padding:5px 16px;
  background:#fff;border:1px solid var(--dbh-line);
  font-size:13.5px;color:var(--dbh-ink);
}

/* --------------------------------------------------------------------------
   联系 / 询价
   -------------------------------------------------------------------------- */
.contact-card{background:#fff;border:1px solid var(--dbh-line);padding:26px 24px;height:100%}
.contact-card .ci{
  width:52px;height:52px;display:flex;align-items:center;justify-content:center;
  background:var(--dbh-primary);color:#fff;font-size:20px;margin-bottom:18px;
}
.contact-card h5{font-size:16px;margin-bottom:8px}
.contact-card p,.contact-card a{
  color:var(--dbh-muted);font-size:14.5px;margin:0;
  text-decoration:none;word-break:break-word;
}
.contact-card a:hover{color:var(--dbh-primary)}
.contact-card .big,
.contact-card .big a{            /* a 的通用色号会盖掉 .big，这里补回来 */
  font-size:22px;font-weight:700;color:var(--dbh-primary);
}
.contact-card .big a:hover{opacity:.8}

.form-floating>label{font-family:var(--dbh-sans);font-size:14px}
.inquiry-note{font-size:13px;color:var(--dbh-muted);margin-top:12px}

/* --------------------------------------------------------------------------
   页脚
   -------------------------------------------------------------------------- */
.footer h3{font-size:16.5px}
.footer .btn-link{
  font-family:var(--dbh-sans);text-transform:none;
  font-size:14px;font-weight:400;
}
.footer p{font-size:14px}
.footer-brand{
  font-size:16.5px;font-weight:700;color:#fff;
  margin-bottom:16px;line-height:1.5;
}
.footer-brand small{
  display:block;font-size:12px;font-weight:400;
  color:rgba(255,255,255,.55);letter-spacing:.3px;margin-top:4px;line-height:1.5;
}
.copyright{font-size:13.5px}
.copyright a{color:rgba(255,255,255,.6)}

/* 平滑锚点滚动 */
html{scroll-behavior:smooth}
[id]{scroll-margin-top:16px}