/* ===== 全站主题（白底 + 黑主色 + 红辅色） ===== */
:root {
  --bg:#ffffff;       /* 页面背景：白 */
  --fg:#111111;       /* 主文字：黑 */
  --muted:#555555;    /* 次级文字：灰 */
  --card:#f9f9f9;     /* 卡片背景：浅灰 */
  --line:#dddddd;     /* 边框线：浅灰 */
  --primary:#e50914;  /* 强调红 */
  --primary-weak:#b40810;

  /* 渐变（红→黑） */
  --grad-red-black: radial-gradient(1200px 300px at 50% -60px, rgba(229,9,20,.35), transparent 60%),
                    linear-gradient(180deg, #e50914 0%, #000000 100%);
}

*{box-sizing:border-box}
html, body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--fg);
  background:var(--bg);
  overflow-y:auto;
}

/* ===== 顶部导航 ===== */
.site-header{
  position:sticky; top:0; z-index:1000;
  background:#fff; border-bottom:1px solid var(--line);
}
.nav{
  width:100%;
  padding:0 16px;
  min-height:40px;
  display:flex;
  align-items:center;
  gap:16px;
}
.logo{ position:static; text-decoration:none; flex:0 0 auto; }
.logo img{ height:30px; width:auto; display:block; }

/* 菜单切换按钮（移动端显示，桌面隐藏靠右） */
.menu-toggle{
  display:none;
  margin-left:auto;
  font-size:22px;
  line-height:1;
  background:transparent;
  border:0;
  color:var(--fg);
  cursor:pointer;
}

/* 主菜单：居中对齐 */
.menu{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  align-items:center;
  gap:4px;
  flex:1 1 auto;
  justify-content:center;
  min-width:0;
}
.menu > li > a,
.item-with-toggle > .parent{
  display:block;
  padding:14px 18px;
  color:var(--fg);
  text-decoration:none;
  border-radius:8px;
  transition:all .2s;
  white-space:nowrap;
}
.menu > li > a:hover,
.item-with-toggle > .parent:hover{
  background:#f5f5f5;
  color:var(--primary);
}
.menu a.is-active{
  color:var(--primary);
  background:#f5f5f5;
}

/* 下拉菜单 */
.has-sub{ position:relative; }
.item-with-toggle{
  display:flex;
  align-items:center;
  gap:4px;
}
.submenu{
  list-style:none;
  position:absolute;
  left:0;
  top:100%;
  margin:0;
  padding:8px;
  min-width:180px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:10px;
  display:none;
}
.submenu li a{
  display:block;
  padding:10px 12px;
  color:var(--fg);
  text-decoration:none;
  border-radius:8px;
}
.submenu li a:hover{
  background:#f5f5f5;
  color:var(--primary);
}
@media(hover:hover){
  .has-sub:hover > .submenu{ display:block; }
}
.sub-toggle{
  background:transparent;
  border:0;
  color:#666;
  cursor:pointer;
  padding:10px 8px;
  border-radius:8px;
}
.sub-toggle:hover{
  background:#f5f5f5;
  color:var(--primary);
}

/* ===== 移动端菜单 ===== */
@media(max-width:768px){
  .menu-toggle{ display:inline-block; }
  .nav{ position:relative; }

  .menu{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    background:#fff;
    border-top:1px solid var(--line);
    display:none;
    flex-direction:column;
    padding:8px;
    z-index:999;
  }
  .menu[data-open="true"]{ display:flex; }
  .menu > li{ width:100%; }
  .menu > li > a,
  .item-with-toggle > .parent{
    width:100%;
    padding:14px;
    border-radius:8px;
    text-align:center;
  }
  .submenu{
    position:static;
    display:none;
    margin-top:6px;
    padding:6px;
    background:#f9f9f9;
    border:1px solid var(--line);
  }
  .submenu.is-open{ display:block; }
  .logo img{ height:25px; }
}

/* ===== 内容区 & iframe ===== */
.content{
  width:100%;
  margin:0;
  padding:0;
}
#contentFrame{
  display:block;
  width:100%;
  border:0;
  overflow:hidden;
  min-height:400px;
  background:#fff;
}

/* ===== 底部 ===== */
.site-footer{
  background-color:#f1f1f1;
  padding:10px;
  text-align:center;
  font-size:14px;
  color:#333;
  border-top:1px solid #ddd;
}
.site-footer p{
  margin:0;
  display:flex;
  justify-content:center;
  align-items:center;
  gap:20px;
  flex-wrap:wrap;
}
.site-footer p span{ color:#e50914; }
.site-footer p a{
  color:#e50914;
  text-decoration:none;
}
.site-footer p a:hover{
  text-decoration:underline;
}

/* ===== 社媒入口（SVG 图标） ===== */
.social-links{
  display:flex;
  align-items:center;
  gap:8px;
  margin-left:8px;
  flex:0 0 auto;
}

.social-link{
  display:flex;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  border-radius:8px;
  text-decoration:none;
  color:var(--fg);
  transition:all .2s ease;
}

.social-link:hover{
  background:#f5f5f5;
  color:var(--primary);
}

.social-link svg{
  width:24px;
  height:24px;
  display:block;
  fill:currentColor;
}

@media(max-width:768px){
  .social-links{
    gap:4px;
    margin-left:4px;
  }

  .social-link{
    width:40px;
    height:40px;
    border-radius:8px;
  }

  .social-link svg{
    width:22px;
    height:22px;
  }
}

/* ===== 淘宝购物车 ===== */
.cart-link{
  display:flex;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  border-radius:8px;
  text-decoration:none;
  color:var(--fg);
  margin-left:auto;
}
.cart-link:hover{
  background:#f5f5f5;
  color:var(--primary);
}
.cart-link svg{
  width:24px;
  height:24px;
  display:block;
  fill:currentColor;
}
@media(max-width:768px){
  .cart-link{
    width:40px;
    height:40px;
  }
  .cart-link svg{
    width:22px;
    height:22px;
  }
}

/* === 语言切换（最小新增） === */
.lang-switch{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:44px;
  padding:0 8px;
  border-radius:8px;
  color:inherit;
  cursor:pointer;
  position:relative;
  margin-left:8px;
}
.lang-switch:hover{
  background:#f5f5f5;
  color:var(--primary);
}
.lang-switch svg{
  width:22px;
  height:22px;
  display:block;
  fill:currentColor;
}
.lang-current{
  font-size:12px;
  opacity:.9;
}

.lang-dropdown{
  position:absolute;
  top:115%;
  right:0;
  min-width:140px;
  padding:6px 0;
  margin:0;
  list-style:none;
  border-radius:10px;
  border:1px solid var(--line);
  box-shadow:0 8px 24px rgba(0,0,0,.12);
  background:#fff;
  display:none;
  z-index:9999;
}
.lang-dropdown.open{ display:block; }
.lang-dropdown li{
  padding:10px 14px;
  line-height:1.2;
  cursor:pointer;
  white-space:nowrap;
  font-size:14px;
}
.lang-dropdown li:hover{
  background:rgba(0,0,0,.06);
}

@media (prefers-color-scheme: dark) {
  .site-header{
    background:rgba(21,21,21,.9);
    border-color:rgba(255,255,255,.08);
  }
  .menu > li > a,
  .item-with-toggle > .parent{
    color:#e6e6e6;
  }
  .menu > li > a:hover,
  .item-with-toggle > .parent:hover{
    background:rgba(255,255,255,.08);
  }
  .submenu{
    background:#202124;
    border-color:rgba(255,255,255,.12);
  }
  .submenu li a{ color:#e6e6e6; }
  .submenu li a:hover{ background:rgba(255,255,255,.08); }

  .cart-link,
  .lang-switch,
  .social-link{
    color:#e6e6e6;
  }

  .cart-link:hover,
  .lang-switch:hover,
  .social-link:hover{
    background:rgba(255,255,255,.08);
    color:#fff;
  }

  .lang-dropdown{
    background:#202124;
    border-color:rgba(255,255,255,.12);
    box-shadow:0 8px 24px rgba(0,0,0,.5);
  }
  .lang-dropdown li:hover{
    background:rgba(255,255,255,.08);
  }
}

/* ===== 浮动微信客服按钮 ===== */
.wechat-float{
  position:fixed;
  right:8px;
  bottom:24px;
  z-index:1200;
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-width:168px;
  height:56px;
  padding:0 18px 0 12px;
  border-radius:999px;
  background:#25D366;
  color:#fff;
  box-shadow:0 10px 28px rgba(0,0,0,.18);
  text-decoration:none;
  transition:transform .2s ease, box-shadow .2s ease, filter .2s ease;
}

.wechat-float:hover{
  transform:translateY(-2px);
  box-shadow:0 14px 34px rgba(0,0,0,.24);
  filter:saturate(1.05);
}

.wechat-float:focus-visible{
  outline:3px solid rgba(37,211,102,.28);
  outline-offset:4px;
}

.wechat-float__icon{
  flex:0 0 auto;
  display:flex;
  align-items:center;
  justify-content:center;
  width:36px;
  height:36px;
}

.wechat-float__icon svg{
  width:32px;
  height:32px;
  display:block;
}

.wechat-float__text{
  font-size:18px;
  font-weight:700;
  line-height:1;
  letter-spacing:.2px;
  white-space:nowrap;
}

.wechat-float__qr{
  position:absolute;
  right:0;
  bottom:68px;
  width:160px;
  padding:10px;
  border-radius:16px;
  background:#fff;
  box-shadow:0 12px 32px rgba(0,0,0,.18);
  opacity:0;
  visibility:hidden;
  transform:translateY(8px);
  transition:opacity .2s ease, transform .2s ease, visibility .2s ease;
}

.wechat-float__qr::after{
  content:"";
  position:absolute;
  right:24px;
  bottom:-8px;
  width:16px;
  height:16px;
  background:#fff;
  transform:rotate(45deg);
}

.wechat-float__qr img{
  display:block;
  width:100%;
  height:auto;
  border-radius:10px;
}

.wechat-float:hover .wechat-float__qr,
.wechat-float:focus-visible .wechat-float__qr,
.wechat-float:focus-within .wechat-float__qr{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}

@media(max-width:768px){
  .wechat-float{
    right:6px;
    bottom:16px;
    min-width:144px;
    height:52px;
    padding:0 16px 0 12px;
    gap:8px;
  }

  .wechat-float__icon{
    width:32px;
    height:32px;
  }

  .wechat-float__icon svg{
    width:28px;
    height:28px;
  }

  .wechat-float__text{
    font-size:16px;
  }

  .wechat-float__qr{
    display:none;
  }
}