/* =========================================================
   YIDIMU HEADER
   所有类名均以 ydm- 开头，尽量避免与米拓原样式冲突
   ========================================================= */
:root{
  --ydm-header-height:76px;
  --ydm-container:1540px;
  --ydm-accent:#e34234;
  --ydm-accent-dark:#c93327;
  --ydm-text:#15171a;
  --ydm-muted:#667085;
  --ydm-line:#e6e8ec;
  --ydm-soft:#f5f6f7;
  --ydm-white:#fff;
  --ydm-shadow:0 18px 52px rgba(16,24,40,.14);
}

.ydm-site-header,
.ydm-site-header *{
  box-sizing:border-box;
}

.ydm-site-header{
  position:sticky;
  top:0;
  z-index:9999;
  width:100%;
  color:var(--ydm-text);
  background:rgba(255,255,255,.98);
  border-bottom:1px solid rgba(230,232,236,.9);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","PingFang SC",Arial,sans-serif;
  transition:box-shadow .25s ease,background-color .25s ease;
}

.ydm-site-header.is-scrolled{
  box-shadow:0 7px 24px rgba(16,24,40,.09);
}

.ydm-header-row{
  width:min(100% - 48px,var(--ydm-container));
  height:var(--ydm-header-height);
  margin:0 auto;
  display:flex;
  align-items:center;
  gap:26px;
}

/* Logo */
.ydm-logo{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  gap:11px;
  min-width:184px;
  color:var(--ydm-text);
  text-decoration:none;
}

.ydm-logo__image{
  display:block;
  width:auto;
  max-width:186px;
  height:42px;
  object-fit:contain;
}

.ydm-logo__fallback{
  display:none;
  align-items:center;
  gap:10px;
  white-space:nowrap;
}

.ydm-logo__image.is-broken + .ydm-logo__fallback{
  display:flex;
}

.ydm-logo__mark{
  width:36px;
  height:36px;
  display:grid;
  place-items:center;
  color:var(--ydm-accent);
}

.ydm-logo__mark svg{
  width:36px;
  height:36px;
}

.ydm-logo__name{
  display:flex;
  flex-direction:column;
  line-height:1;
}

.ydm-logo__name strong{
  font-size:20px;
  letter-spacing:.08em;
}

.ydm-logo__name small{
  margin-top:5px;
  color:var(--ydm-muted);
  font-size:10px;
  letter-spacing:.18em;
}

/* Desktop navigation */
.ydm-desktop-nav{
  min-width:0;
  flex:1 1 auto;
  height:100%;
}

.ydm-nav-list{
  height:100%;
  margin:0;
  padding:0;
  list-style:none;
  display:flex;
  align-items:stretch;
  justify-content:center;
  gap:3px;
}

.ydm-nav-item{
  display:flex;
  align-items:stretch;
}

.ydm-nav-top{
  position:relative;
  display:flex;
  align-items:center;
  padding:0 12px;
}

.ydm-nav-top::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:0;
  height:3px;
  border-radius:3px 3px 0 0;
  background:var(--ydm-accent);
  transform:scaleX(0);
  transform-origin:center;
  transition:transform .22s ease;
}

.ydm-nav-item:hover .ydm-nav-top::after,
.ydm-nav-item.is-open .ydm-nav-top::after,
.ydm-nav-top:focus-within::after{
  transform:scaleX(1);
}

.ydm-nav-link{
  display:inline-flex;
  align-items:center;
  height:100%;
  color:#24272c;
  text-decoration:none;
  white-space:nowrap;
  font-size:15px;
  font-weight:550;
  transition:color .2s ease;
}

.ydm-nav-link:hover,
.ydm-nav-link:focus-visible,
.ydm-nav-item.is-open .ydm-nav-link,
.ydm-nav-link.is-current{
  color:var(--ydm-accent);
}

.ydm-menu-trigger{
  width:28px;
  height:44px;
  margin-left:1px;
  padding:0;
  border:0;
  display:grid;
  place-items:center;
  color:#80858d;
  background:transparent;
  cursor:pointer;
}

.ydm-menu-trigger svg{
  width:13px;
  height:13px;
  transition:transform .22s ease;
}

.ydm-nav-item.is-open .ydm-menu-trigger svg{
  transform:rotate(180deg);
}

.ydm-menu-trigger:focus-visible,
.ydm-mobile-toggle:focus-visible,
.ydm-mobile-close:focus-visible,
.ydm-mobile-accordion__button:focus-visible,
.ydm-tab-button:focus-visible{
  outline:3px solid rgba(227,66,52,.22);
  outline-offset:2px;
}

/* Header actions */
.ydm-header-actions{
  flex:0 0 auto;
  display:flex;
  align-items:center;
  gap:15px;
}

.ydm-language{
  display:inline-flex;
  align-items:center;
  gap:7px;
  color:#5d6470;
  text-decoration:none;
  white-space:nowrap;
  font-size:14px;
}

.ydm-language svg{
  width:17px;
  height:17px;
}

.ydm-language:hover{
  color:var(--ydm-accent);
}

.ydm-header-cta{
  min-height:44px;
  padding:0 20px;
  border-radius:999px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:7px;
  color:#fff;
  background:var(--ydm-accent);
  box-shadow:0 8px 20px rgba(227,66,52,.2);
  text-decoration:none;
  white-space:nowrap;
  font-size:14px;
  font-weight:700;
  transition:transform .2s ease,background-color .2s ease,box-shadow .2s ease;
}

.ydm-header-cta:hover{
  transform:translateY(-1px);
  background:var(--ydm-accent-dark);
  box-shadow:0 11px 25px rgba(227,66,52,.27);
}

.ydm-header-cta svg{
  width:15px;
  height:15px;
}

/* Dropdown common */
.ydm-mega{
  position:fixed;
  z-index:10001;
  top:var(--ydm-header-height);
  left:0;
  right:0;
  visibility:hidden;
  opacity:0;
  pointer-events:none;
  transform:translateY(-7px);
  transition:opacity .18s ease,transform .18s ease,visibility .18s ease;
}

.ydm-nav-item.is-open .ydm-mega{
  visibility:visible;
  opacity:1;
  pointer-events:auto;
  transform:translateY(0);
}

.ydm-mega__shell{
  width:min(100% - 48px,var(--ydm-container));
  margin:0 auto;
  overflow:hidden;
  border:1px solid var(--ydm-line);
  border-top:0;
  border-radius:0 0 18px 18px;
  background:#fff;
  box-shadow:var(--ydm-shadow);
}

.ydm-menu-backdrop{
  position:fixed;
  z-index:9998;
  top:var(--ydm-header-height);
  right:0;
  bottom:0;
  left:0;
  visibility:hidden;
  opacity:0;
  pointer-events:none;
  background:rgba(9,12,16,.28);
  backdrop-filter:blur(2px);
  transition:opacity .2s ease,visibility .2s ease;
}

.ydm-menu-backdrop.is-visible{
  visibility:visible;
  opacity:1;
  pointer-events:auto;
}

/* Product mega menu */
.ydm-product-menu{
  min-height:414px;
  display:grid;
  grid-template-columns:300px minmax(360px,1fr) minmax(390px,520px);
}

.ydm-product-tabs{
  padding:25px 20px 24px;
  border-right:1px solid var(--ydm-line);
  background:#fafafa;
}

.ydm-menu-eyebrow{
  margin:0 0 12px;
  padding:0 10px;
  color:#9298a1;
  font-size:12px;
  font-weight:700;
  letter-spacing:.14em;
  text-transform:uppercase;
}

.ydm-tab-list{
  margin:0;
  padding:0;
  list-style:none;
}

.ydm-tab-list li + li{
  margin-top:5px;
}

.ydm-tab-button{
  width:100%;
  min-height:53px;
  padding:0 14px 0 16px;
  border:0;
  border-radius:10px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  color:#30343a;
  background:transparent;
  text-align:left;
  cursor:pointer;
  font:inherit;
  font-size:15px;
  font-weight:650;
  transition:color .18s ease,background-color .18s ease,transform .18s ease;
}

.ydm-tab-button:hover,
.ydm-tab-button.is-active{
  color:#fff;
  background:#24272c;
  transform:translateX(2px);
}

.ydm-tab-button svg{
  width:15px;
  height:15px;
  flex:0 0 auto;
}

.ydm-product-content{
  position:relative;
  padding:38px 42px 32px;
  background:#fff;
}

.ydm-tab-panel{
  display:none;
  animation:ydmFadeIn .22s ease;
}

.ydm-tab-panel.is-active{
  display:block;
}

@keyframes ydmFadeIn{
  from{opacity:0;transform:translateY(5px)}
  to{opacity:1;transform:translateY(0)}
}

.ydm-tab-panel__kicker{
  margin:0 0 8px;
  color:var(--ydm-accent);
  font-size:12px;
  font-weight:800;
  letter-spacing:.12em;
}

.ydm-tab-panel h2,
.ydm-tab-panel h3{
  margin:0;
  color:#181b20;
  font-size:25px;
  line-height:1.3;
  letter-spacing:-.02em;
}

.ydm-tab-panel__desc{
  max-width:590px;
  margin:14px 0 23px;
  color:#626975;
  font-size:14px;
  line-height:1.75;
}

.ydm-model-links{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:8px 22px;
  margin:0 0 26px;
  padding:0;
  list-style:none;
}

.ydm-model-links a{
  min-height:38px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  color:#30343a;
  border-bottom:1px solid #eceef1;
  text-decoration:none;
  font-size:14px;
  font-weight:600;
}

.ydm-model-links a::after{
  content:"→";
  color:#a1a6ae;
  transition:transform .18s ease,color .18s ease;
}

.ydm-model-links a:hover{
  color:var(--ydm-accent);
}

.ydm-model-links a:hover::after{
  color:var(--ydm-accent);
  transform:translateX(3px);
}

.ydm-panel-action{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--ydm-accent);
  text-decoration:none;
  font-size:14px;
  font-weight:750;
}

.ydm-panel-action:hover{
  color:var(--ydm-accent-dark);
}

.ydm-product-visual{
  position:relative;
  min-height:414px;
  overflow:hidden;
  background:linear-gradient(145deg,#f7f7f7,#e9ecef);
}

.ydm-product-image{
  width:100%;
  height:100%;
  min-height:414px;
  display:block;
  object-fit:cover;
  transition:opacity .18s ease,transform .45s ease;
}

.ydm-product-visual:hover .ydm-product-image{
  transform:scale(1.018);
}

.ydm-product-image.is-broken{
  display:none;
}

.ydm-image-fallback{
  position:absolute;
  inset:0;
  display:none;
  align-items:center;
  justify-content:center;
  padding:34px;
  text-align:center;
  color:#7a808a;
  background:
    radial-gradient(circle at 75% 25%,rgba(227,66,52,.14),transparent 28%),
    linear-gradient(145deg,#f7f7f7,#e9ecef);
  font-size:14px;
  line-height:1.7;
}

.ydm-product-image.is-broken + .ydm-image-fallback{
  display:flex;
}

.ydm-visual-label{
  position:absolute;
  right:22px;
  bottom:20px;
  left:22px;
  padding:15px 17px;
  border:1px solid rgba(255,255,255,.58);
  border-radius:12px;
  color:#fff;
  background:rgba(18,20,23,.62);
  backdrop-filter:blur(12px);
}

.ydm-visual-label strong{
  display:block;
  margin-bottom:3px;
  font-size:15px;
}

.ydm-visual-label span{
  font-size:12px;
  opacity:.82;
}

/* Application menu */
.ydm-application-menu{
  min-height:390px;
  display:grid;
  grid-template-columns:minmax(560px,1.35fr) minmax(390px,.85fr);
}

.ydm-application-links{
  padding:34px 38px 34px;
}

.ydm-menu-heading-row{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:24px;
}

.ydm-menu-heading-row h2{
  margin:0;
  font-size:25px;
}

.ydm-menu-heading-row a{
  color:var(--ydm-accent);
  text-decoration:none;
  font-size:13px;
  font-weight:750;
}

.ydm-app-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:10px 12px;
}

.ydm-app-card{
  min-height:70px;
  padding:14px 16px;
  border:1px solid #e9ebee;
  border-radius:11px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  color:#25292f;
  background:#fff;
  text-decoration:none;
  transition:border-color .18s ease,background-color .18s ease,transform .18s ease,color .18s ease;
}

.ydm-app-card:hover,
.ydm-app-card.is-active{
  border-color:#dfdfdf;
  color:var(--ydm-accent);
  background:#f7f7f7;
  transform:translateY(-1px);
}

.ydm-app-card__text strong{
  display:block;
  margin-bottom:3px;
  font-size:14px;
}

.ydm-app-card__text span{
  display:block;
  color:#878d96;
  font-size:12px;
  line-height:1.5;
}

.ydm-app-card svg{
  width:15px;
  height:15px;
  flex:0 0 auto;
}

.ydm-application-visual{
  position:relative;
  min-height:390px;
  overflow:hidden;
  background:#eceff1;
}

.ydm-application-image{
  width:100%;
  height:100%;
  min-height:390px;
  display:block;
  object-fit:cover;
  transition:opacity .18s ease,transform .45s ease;
}

.ydm-application-image.is-broken{
  display:none;
}

.ydm-application-image.is-broken + .ydm-image-fallback{
  display:flex;
}

.ydm-application-visual:hover .ydm-application-image{
  transform:scale(1.018);
}

/* Compact menus */
.ydm-compact-menu{
  padding:30px 32px 32px;
}

.ydm-compact-menu--sample{
  display:grid;
  grid-template-columns:minmax(0,1fr) 340px;
  gap:30px;
}

.ydm-compact-title{
  margin:0 0 22px;
  font-size:24px;
}

.ydm-link-columns{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:14px;
}

.ydm-link-card{
  min-height:96px;
  padding:17px 18px;
  border:1px solid var(--ydm-line);
  border-radius:12px;
  color:#292d33;
  background:#fff;
  text-decoration:none;
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}

.ydm-link-card:hover{
  transform:translateY(-2px);
  border-color:#d5d8dc;
  box-shadow:0 10px 24px rgba(16,24,40,.08);
}

.ydm-link-card strong{
  display:block;
  margin-bottom:7px;
  font-size:14px;
}

.ydm-link-card span{
  color:#7a818b;
  font-size:12px;
  line-height:1.6;
}

.ydm-sample-visual{
  position:relative;
  min-height:220px;
  overflow:hidden;
  border-radius:13px;
  background:#eef0f2;
}

.ydm-sample-visual img{
  width:100%;
  height:100%;
  min-height:220px;
  display:block;
  object-fit:cover;
}

.ydm-sample-visual img.is-broken{
  display:none;
}

.ydm-sample-visual img.is-broken + .ydm-image-fallback{
  display:flex;
}

.ydm-resource-grid,
.ydm-about-grid{
  display:grid;
  gap:22px 34px;
}

.ydm-resource-grid{
  grid-template-columns:repeat(3,minmax(0,1fr));
}

.ydm-about-grid{
  grid-template-columns:repeat(4,minmax(0,1fr));
}

.ydm-menu-group h3{
  margin:0 0 12px;
  color:#262a30;
  font-size:14px;
}

.ydm-menu-group ul{
  margin:0;
  padding:0;
  list-style:none;
}

.ydm-menu-group li + li{
  margin-top:10px;
}

.ydm-menu-group a{
  color:#69717c;
  text-decoration:none;
  font-size:13px;
}

.ydm-menu-group a:hover{
  color:var(--ydm-accent);
}

.ydm-highlight-card{
  padding:20px;
  border-radius:13px;
  color:#fff;
  background:#22252a;
}

.ydm-highlight-card h3{
  margin:0 0 9px;
  color:#fff;
  font-size:18px;
}

.ydm-highlight-card p{
  margin:0 0 16px;
  color:#c5c9cf;
  font-size:12px;
  line-height:1.7;
}

.ydm-highlight-card a{
  color:#fff;
  text-decoration:none;
  font-size:13px;
  font-weight:750;
}

/* Mobile controls */
.ydm-mobile-toggle{
  width:44px;
  height:44px;
  padding:0;
  border:0;
  border-radius:10px;
  display:none;
  align-items:center;
  justify-content:center;
  color:#23272c;
  background:#f4f5f6;
  cursor:pointer;
}

.ydm-mobile-toggle svg{
  width:23px;
  height:23px;
}

.ydm-mobile-overlay{
  position:fixed;
  z-index:10010;
  inset:0;
  visibility:hidden;
  opacity:0;
  background:rgba(10,12,15,.38);
  transition:opacity .22s ease,visibility .22s ease;
}

.ydm-mobile-overlay.is-visible{
  visibility:visible;
  opacity:1;
}

.ydm-mobile-drawer{
  position:fixed;
  z-index:10011;
  top:0;
  right:0;
  bottom:0;
  width:min(92vw,430px);
  overflow-y:auto;
  color:#24282e;
  background:#fff;
  box-shadow:-18px 0 50px rgba(16,24,40,.2);
  transform:translateX(102%);
  transition:transform .26s ease;
}

.ydm-mobile-drawer.is-open{
  transform:translateX(0);
}

.ydm-mobile-head{
  min-height:72px;
  padding:0 18px 0 22px;
  border-bottom:1px solid var(--ydm-line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
}

.ydm-mobile-brand{
  font-size:18px;
  font-weight:800;
  letter-spacing:.08em;
}

.ydm-mobile-close{
  width:42px;
  height:42px;
  padding:0;
  border:0;
  border-radius:10px;
  display:grid;
  place-items:center;
  color:#2a2e34;
  background:#f3f4f5;
  cursor:pointer;
}

.ydm-mobile-close svg{
  width:22px;
  height:22px;
}

.ydm-mobile-body{
  padding:14px 18px 28px;
}

.ydm-mobile-home{
  min-height:52px;
  padding:0 8px;
  display:flex;
  align-items:center;
  color:#25292f;
  border-bottom:1px solid #eceef1;
  text-decoration:none;
  font-size:15px;
  font-weight:700;
}

.ydm-mobile-accordion{
  border-bottom:1px solid #eceef1;
}

.ydm-mobile-accordion__head{
  display:flex;
  align-items:center;
}

.ydm-mobile-accordion__head > a{
  min-height:56px;
  flex:1;
  padding:0 8px;
  display:flex;
  align-items:center;
  color:#25292f;
  text-decoration:none;
  font-size:15px;
  font-weight:700;
}

.ydm-mobile-accordion__button{
  width:48px;
  height:48px;
  padding:0;
  border:0;
  display:grid;
  place-items:center;
  color:#7a8089;
  background:transparent;
  cursor:pointer;
}

.ydm-mobile-accordion__button svg{
  width:16px;
  height:16px;
  transition:transform .2s ease;
}

.ydm-mobile-accordion.is-open .ydm-mobile-accordion__button svg{
  transform:rotate(180deg);
}

.ydm-mobile-submenu{
  display:none;
  padding:4px 8px 16px;
}

.ydm-mobile-accordion.is-open .ydm-mobile-submenu{
  display:block;
}

.ydm-mobile-submenu a{
  min-height:43px;
  padding:7px 10px;
  border-radius:8px;
  display:flex;
  align-items:center;
  color:#606873;
  text-decoration:none;
  font-size:13px;
  line-height:1.5;
}

.ydm-mobile-submenu a:hover{
  color:var(--ydm-accent);
  background:#f6f7f8;
}

.ydm-mobile-actions{
  margin-top:22px;
  display:grid;
  gap:11px;
}

.ydm-mobile-actions .ydm-header-cta{
  min-height:50px;
  width:100%;
}

.ydm-mobile-language{
  min-height:48px;
  border:1px solid var(--ydm-line);
  border-radius:999px;
  display:flex;
  align-items:center;
  justify-content:center;
  color:#4c535d;
  text-decoration:none;
  font-size:14px;
  font-weight:650;
}

body.ydm-menu-lock{
  overflow:hidden;
}

/* Responsive */
@media (max-width:1370px){
  .ydm-header-row{gap:17px}
  .ydm-logo{min-width:160px}
  .ydm-nav-top{padding:0 8px}
  .ydm-nav-top::after{left:8px;right:8px}
  .ydm-nav-link{font-size:14px}
  .ydm-header-actions{gap:10px}
  .ydm-header-cta{padding:0 16px}
  .ydm-product-menu{grid-template-columns:265px minmax(330px,1fr) minmax(350px,450px)}
}

@media (max-width:1180px){
  :root{--ydm-header-height:68px}
  .ydm-header-row{width:min(100% - 28px,var(--ydm-container));height:var(--ydm-header-height)}
  .ydm-desktop-nav,.ydm-header-actions{display:none}
  .ydm-logo{min-width:0;flex:1}
  .ydm-logo__image{height:38px;max-width:175px}
  .ydm-mobile-toggle{display:flex}
  .ydm-mega,.ydm-menu-backdrop{display:none!important}
}

@media (max-width:560px){
  .ydm-header-row{width:calc(100% - 24px)}
  .ydm-logo__image{max-width:155px;height:34px}
  .ydm-logo__name strong{font-size:18px}
  .ydm-logo__mark,.ydm-logo__mark svg{width:32px;height:32px}
}

@media (prefers-reduced-motion:reduce){
  .ydm-site-header *,
  .ydm-site-header *::before,
  .ydm-site-header *::after{
    scroll-behavior:auto!important;
    animation-duration:.01ms!important;
    animation-iteration-count:1!important;
    transition-duration:.01ms!important;
  }
}

/* 以下仅用于本演示文件，不属于 Header，可删除 */
.ydm-demo-main{
  min-height:120vh;
  padding:110px 24px;
  background:linear-gradient(135deg,#fafafa,#eef0f2);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","PingFang SC",Arial,sans-serif;
  text-align:center;
}
.ydm-demo-main h1{margin:0 0 16px;font-size:clamp(34px,6vw,78px)}
.ydm-demo-main p{margin:0;color:#69717c;font-size:16px}