/* ===== 基础变量 / 重置 / 头部导航 ===== */

/* ===== 配色变量 ===== */
:root {
  --biz-navy: #333333;       /* 标题墨色（ h_title） */
  --biz-blue: #1e62ec;       /* 主色 */
  --biz-cyan: #327cfb;       /* 渐变亮端 */
  --biz-gold: #ffaf2b;       /* 点缀橙 */
  --biz-ink: #333333;
  --biz-soft: #f5f5f9;       /* 背景 */
  --biz-light: #e3ebfb;      /* 悬停浅蓝 */
  --pboot-cyan: #2970f4;     /* 链接悬停 */
  --pboot-light: #f5f5f9;
}
* { box-sizing: border-box; }
body {
  margin: 0; color: var(--biz-ink); background: #f5f5f9;
  font-family: "Microsoft YaHei", Arial, Helvetica, sans-serif;
  font-size: 14px; line-height: 1.7;
}
a { color: inherit; text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--biz-blue); }
ul, ol { list-style: none; margin: 0; padding: 0; }
img { max-width: 100%; }
h1, h2, h3, h4 { margin: 0; }
p { margin: 0 0 12px; }
.site-shell { width: calc(100% - 40px); max-width: 1440px; margin-right: auto; margin-left: auto; }

/* ===== 导航栏（白底+阴影） ===== */
.site-navbar {
  position: sticky; z-index: 1000; top: 0; min-height: 76px;
  background: rgba(255,255,255,.97);
  border-bottom: 1px solid #e8e8e8;
  box-shadow: 0 2px 29px 0 rgba(0,0,0,.08);
}
.nav-inner { display: flex; align-items: center; min-height: 76px; gap: 8px; }
.pbootbiz-brand { display: flex; flex: 0 0 auto; align-items: center; margin-right: 22px; }
.brand-mark {
  display: flex; width: 46px; height: 46px; margin-right: 11px;
  color: #fff; background: linear-gradient(145deg, var(--biz-cyan), var(--biz-blue));
  border-radius: 13px 5px 13px 5px;
  align-items: center; justify-content: center;
  font-size: 22px; font-weight: 700; line-height: 1;
  box-shadow: 0 7px 16px rgba(30,98,236,.22);
}
.brand-copy { display: flex; flex-direction: column; line-height: 1.05; }
.brand-copy strong { color: var(--biz-navy); font-size: 24px; letter-spacing: -.7px; }
.brand-copy small { margin-top: 6px; color: #838383; font-size: 11px; letter-spacing: .7px; }
.site-menu { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.site-menu-item > a {
  position: relative; display: block; padding: 26px 15px;
  color: var(--biz-ink); font-size: 15px;
}
.site-menu-item > a::after {
  position: absolute; bottom: 13px; left: 50%; width: 0; height: 3px;
  content: ''; background: var(--biz-blue);
  transform: translateX(-50%); transition: width .2s ease;
}
.site-menu-item.active > a, .site-menu-item > a:hover { color: var(--biz-blue); }
.site-menu-item.active > a::after, .site-menu-item > a:hover::after { width: 20px; }

/* ===== 桌面端二级下拉菜单 ===== */
.site-menu-item.has-sub { position: relative; }
/* 细线圆角 chevron 箭头（桌面/移动端共用） */
.sub-caret {
  position: absolute; right: 9px; top: 50%;
  width: 7px; height: 7px; margin: 0;
  border: solid #aab2bf; border-width: 0 1.5px 1.5px 0;
  border-radius: 1px;
  transform: translateY(-70%) rotate(45deg);
  transition: transform .25s ease, border-color .25s ease;
}
.site-menu-item.has-sub > a { display: inline-block; padding-right: 28px; }
.site-submenu {
  position: absolute; top: 100%; left: 50%; z-index: 1100; padding: 6px 0;
  background: #fff; border: 1px solid #e8e8e8; border-radius: 10px;
  box-shadow: 0 12px 28px rgba(0,0,0,.12);
  opacity: 0; visibility: hidden;
  transform: translateX(-50%) translateY(8px);
  transition: opacity .2s ease, transform .2s ease, visibility .2s;
}
.site-submenu li a {
  display: block; padding: 9px 20px;
  color: var(--biz-ink); font-size: 14px; white-space: nowrap;
  transition: background .2s ease, color .2s ease, padding-left .2s ease;
}
.site-submenu li a:hover {
  color: var(--biz-blue); background: var(--biz-light); padding-left: 26px;
}
/* 父项悬停/聚焦时展开下拉（含间隙容错区，避免鼠标移动中下拉消失） */
.site-menu-item.has-sub:hover .site-submenu,
.site-menu-item.has-sub:focus-within .site-submenu {
  opacity: 1; visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.site-menu-item.has-sub:hover .sub-caret { transform: rotate(180deg); }
/* 下拉顶部小三角 */
.site-submenu::before {
  position: absolute; top: -5px; left: 50%; width: 9px; height: 9px;
  content: ''; background: #fff;
  border-top: 1px solid #e8e8e8; border-left: 1px solid #e8e8e8;
  transform: translateX(-50%) rotate(45deg);
}

/* ===== 移动端汉堡按钮（小屏显示，桌面隐藏） ===== */
.nav-toggle {
  display: none; flex-direction: column; align-items: center; justify-content: center;
  width: 42px; height: 42px; gap: 5px;
  background: #fff; border: 1px solid #e0e0e0; border-radius: 10px; cursor: pointer;
}
.nav-toggle span {
  display: block; width: 20px; height: 2px; border-radius: 2px;
  background: var(--biz-ink); transition: transform .25s ease, opacity .25s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 小屏：菜单改为下拉展开，不再直接隐藏 */
@media (max-width: 860px) {
  .nav-toggle { display: flex; }
  .brand-copy small { display: none; }
  .brand-copy strong { font-size: 19px; }
  .site-menu {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch; flex-wrap: nowrap; gap: 0;
  }
  /* 用更高优先级选择器写背景/阴影，防止页面内后加载的 .site-menu { background: none } 兼容覆盖导致菜单透明 */
  .site-navbar.nav-open .site-menu {
    display: flex; background: #fff;
    border-bottom: 1px solid #e8e8e8;
    box-shadow: 0 12px 24px rgba(0,0,0,.10);
  }
  .site-menu-item > a { padding: 13px 20px; font-size: 15px; border-top: 1px solid #f0f0f0; }
  .site-menu-item > a::after { display: none; }
  .site-menu-item.active > a { color: var(--biz-blue); background: var(--biz-light); }
  /* 小屏：二级菜单改为内联手风琴，点击父项展开 */
  .site-menu-item.has-sub > a {
    padding-right: 44px; cursor: pointer;
  }
  .sub-caret {
    position: absolute; right: 20px; top: 50%; margin-left: 0; vertical-align: 0;
    transform: translateY(-50%);
    border-top-color: #999;
  }
  .site-menu-item.has-sub.sub-open .sub-caret { transform: translateY(-50%) rotate(180deg); }
  .site-submenu {
    position: static; display: none; min-width: 0; padding: 0;
    opacity: 1; visibility: visible; transform: none;
    background: var(--biz-soft); border: none; border-radius: 0;
    box-shadow: none;
  }
  .site-submenu::before { display: none; }
  .site-menu-item.has-sub.sub-open .site-submenu { display: block; }
  .site-submenu li a {
    padding: 11px 20px 11px 38px; font-size: 14px;
    border-top: 1px solid #eee; border-radius: 0;
  }
  .site-submenu li a:hover { padding-left: 44px; }
  .nav-user { gap: 8px; }
  .nav-user a { padding: 8px 20px; font-size: 13px; }
}

/* 右上角注册登录 */
.nav-user {  right: 0; top: 0; color: #8d8d8d;
    height: 100%; display: flex; align-items: center; gap: 10px; margin-left: auto; flex-shrink: 0; }
.nav-user a {
  display: inline-block; border-radius: 17px; font-size: 15px;
  padding: 8px 20px;  text-decoration: none; transition: all .25s ease;color: #4e73df;display: inline-block;position: relative;
}
.nav-user .nav-login { color: var(--biz-blue); border: 1px solid var(--biz-blue); background: transparent; }
.nav-user .nav-login:hover { background: var(--biz-light); }
.nav-user .nav-reg {
  color: #fff; border: none;
  background: linear-gradient(90deg, var(--biz-blue), var(--biz-cyan));
  box-shadow: 0 4px 12px rgba(30,98,236,.32);
}
.nav-user .nav-reg:hover { opacity: .88; transform: translateY(-1px); }

@media (max-width: 860px) {
  .site-submenu,
  .site-menu-item.has-sub:hover .site-submenu,
  .site-menu-item.has-sub:focus-within .site-submenu {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
  }
  .site-submenu { display: none; }
  .site-menu-item.has-sub.sub-open .site-submenu { display: block; }
  .site-menu-item.has-sub > a { display: block; }
  .site-menu-item.has-sub:not(:has(.site-submenu li)) > .sub-caret { display: none; }
  .site-menu-item.has-sub:not(:has(.site-submenu li)) > a { padding-right: 20px; }
}