/*
Theme Name: Auto Parts Wholesale
Theme URI: https://example.com/
Author: Your Name
Author URI: https://example.com/
Description: 面向欧美市场的汽车消耗件B2B批发站主题，内置产品/新闻/询价表单、SEO基础结构。
Version: 1.0.0
Text Domain: auto-parts
*/

:root{
  --brand:#0d6efd; --text:#1f2937; --muted:#6b7280; --border:#e5e7eb; --bg-alt:#f8fafc;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Ubuntu,"Helvetica Neue",Arial;color:var(--text);line-height:1.6}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.container{width:min(1120px,92%);margin:auto}

/* Header / Nav */
.header{position:sticky;top:0;z-index:1000;background:#fff;border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo a{font-weight:800;font-size:1.25rem;color:#111827;text-decoration:none}
.menu{display:flex;gap:1rem;align-items:center;margin:0;padding:0;list-style:none}
.menu a{display:block;padding:.6rem .8rem;border-radius:.4rem;font-weight:600;color:#334155}
.menu a:hover{background:var(--bg-alt)}
.nav-toggle{display:none}
@media(max-width:960px){
  .nav{height:auto;padding:.75rem 0}
  .nav-toggle{display:inline-flex;align-items:center;gap:.5rem;border:1px solid var(--border);padding:.4rem .75rem;border-radius:.4rem;background:#fff}
  .menu{display:none;flex-direction:column;align-items:flex-start;width:100%;padding:.75rem 0}
  .menu.open{display:flex}
}

/* Sections */
.hero{background:linear-gradient(180deg,#f0f6ff 0%, #fff 80%);padding:48px 0}
.section{padding:56px 0}
.section h2{font-size:1.8rem;margin:0 0 1rem}
.grid{display:grid;gap:1rem}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:960px){.grid-3,.grid-4{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.grid-3,.grid-4{grid-template-columns:1fr}}

/* Cards / Product */
.card{border:1px solid var(--border);border-radius:.6rem;background:#fff;overflow:hidden}
.card .body{padding:1rem}
.product .thumb{aspect-ratio:4/3;background:#f3f4f6;display:flex;align-items:center;justify-content:center}
.price{font-weight:800}

/* Breadcrumb */
.breadcrumb{font-size:.92rem;color:#6b7280;padding:.75rem 0}
.breadcrumb a{color:#6b7280}
.breadcrumb span{margin:0 .35rem}

/* Footer */
.footer{background:#0b1220;color:#cbd5e1;padding:48px 0 24px}
.footer h4{color:#93c5fd;margin:0 0 .8rem}
.footer a{color:#cbd5e1}
.footer a:hover{color:#93c5fd}

/* Forms */
.form{display:grid;gap:.9rem}
.input, select, textarea{width:100%;padding:.7rem .8rem;border:1px solid var(--border);border-radius:.45rem;font:inherit}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;padding:.6rem .9rem;border-radius:.45rem;border:1px solid var(--brand);color:#fff;background:var(--brand);cursor:pointer}
.btn.secondary{background:#fff;color:var(--brand)}
.help{font-size:.85rem;color:var(--muted)}
.notice{background:#f0fdf4;border:1px solid #bbf7d0;padding:.8rem 1rem;border-radius:.45rem;margin-top:.8rem}
.center{text-align:center}
.muted{color:var(--muted)}





/* Mega Menu 基础样式 */
.mega-menu {
  left: 0;
  right: 0;
  top: 100%;
  border-top: 2px solid #007bff;
}
.mega-menu .col-md-3 {
  margin-bottom: 15px;
}
.mega-menu h6 {
  font-size: 14px;
  margin-bottom: 10px;
  text-transform: uppercase;
}


/* 覆盖 Bootstrap 的深色导航 */
.navbar.navbar-dark.bg-dark {
  background-color: #fff !important; /* 白色背景 */
  border-bottom: 1px solid #ddd;
}

.navbar-dark .navbar-nav .nav-link {
  color: #333 !important;  /* 深灰文字 */
  font-weight: 500;
  padding: 10px 15px;
}

.navbar-dark .navbar-nav .nav-link:hover {
  color: #007bff !important; /* 悬停蓝色 */
}

.navbar-brand {
  color: #000 !important;
  font-weight: bold;
  font-size: 20px;
}

.btn-accent {
  background-color: #007bff;
  color: #fff;
  padding: 6px 12px;
  border-radius: 4px;
}


/* 一级菜单 hover 展开 */
.navbar .dropdown:hover > .dropdown-menu {
  display: block;
  visibility: visible;
  opacity: 1;
  margin-top: 0;
}

/* 默认隐藏子菜单 */
.navbar .dropdown-menu {
  display: none;
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.2s ease, visibility 0.2s ease;
  position: absolute;
}

/* 三级子菜单展开方向 */
.navbar .dropdown-submenu:hover > .dropdown-menu {
  display: block;
  visibility: visible;
  opacity: 1;
  left: 100%;
  top: 0;
  margin-top: -1px;
}

/* 保持下拉菜单对齐 */
.navbar-nav .dropdown-menu {
  margin-top: 0;
}