/* ===== 彩界资讯网 移动端导航美化 ===== */
@media (max-width:999px){

  /* 抽屉面板：白底 + 圆角 + 阴影 */
  aside.mobile_aside.mobile_nav{
    background: linear-gradient(180deg,#ffffff 0%,#f8fafc 100%);
    width:82%;
    max-width:340px;
    box-shadow: 8px 0 30px rgba(30,41,59,.18);
    border-radius: 0 16px 16px 0;
    overflow-y:auto;
    transition: left .35s cubic-bezier(.4,0,.2,1);
  }

  /* 品牌头部 */
  aside.mobile_aside.mobile_nav::before{
    content: "";
    display:block;
    height: 76px;
    background: linear-gradient(135deg,#4a90d9 0%,#6db3f2 100%);
    margin-bottom: 4px;
    position: relative;
  }
  aside.mobile_aside.mobile_nav::after{
    content: "彩界资讯网";
    position: absolute;
    top: 18px;
    left: 20px;
    color: #fff;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 1px;
    text-shadow: 0 1px 4px rgba(0,0,0,.15);
    z-index: 1;
  }

  /* 菜单列表 */
  aside.mobile_nav ul#nav{
    padding: 8px 0 16px;
    margin: 0;
  }
  aside.mobile_nav ul#nav > li{
    padding: 0 18px;
    border-bottom: 1px solid #eef2f7;
  }
  aside.mobile_nav ul#nav > li:last-child{
    border-bottom: none;
  }
  aside.mobile_nav ul#nav > li > a{
    padding: 13px 6px 13px 26px;
    font-size: 15px;
    color: #334155;
    border-radius: 8px;
    position: relative;
    transition: all .2s;
  }
  /* 菜单项前圆点图标 */
  aside.mobile_nav ul#nav > li > a:before{
    content: "";
    position: absolute;
    left: 6px;
    top: 50%;
    transform: translateY(-50%);
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #4a90d9;
    opacity: .65;
    transition: all .2s;
  }
  aside.mobile_nav ul#nav > li > a:hover{
    color: #4a90d9;
    background: #f0f6ff;
    padding-left: 30px;
  }
  aside.mobile_nav ul#nav > li > a:hover:before{
    opacity: 1;
    transform: translateY(-50%) scale(1.3);
    background: #e74c3c;
  }
  /* 当前激活项 */
  aside.mobile_nav ul#nav > li.active > a{
    color: #4a90d9;
    font-weight: 600;
    background: #eef5ff;
  }
  aside.mobile_nav ul#nav > li.active > a:before{
    background: #e74c3c;
    opacity: 1;
  }
  /* 工具/走势红色项 */
  aside.mobile_nav ul#nav > li > a[style*="color:#e74c3c"]{
    color: #e74c3c !important;
  }
  aside.mobile_nav ul#nav > li > a[style*="color:#e74c3c"]:before{
    background: #e74c3c;
  }

  /* 遮罩 */
  #mask{
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(15,23,42,.5);
    z-index: 99998;
    display: none;
    opacity: 0;
    transition: opacity .3s;
  }
  body.open #mask{
    display: block;
    opacity: 1;
  }

  /* 汉堡按钮动画（展开时三条线变X） */
  i.nav-bar{
    display: inline-block;
    width: 26px;
    height: 22px;
    position: relative;
    padding: 0;
    line-height: normal;
    margin-top: 6px;
  }
  i.nav-bar span{
    position: absolute;
    left: 0;
    width: 100%;
    height: 2.5px;
    border-radius: 3px;
    background: #2c3e50;
    transition: all .3s;
  }
  i.nav-bar span:nth-child(1){ top: 0; }
  i.nav-bar span:nth-child(2){ top: 9px; }
  i.nav-bar span:nth-child(3){ top: 18px; }
  i.nav-bar.on span:nth-child(1){
    top: 9px;
    transform: rotate(45deg);
  }
  i.nav-bar.on span:nth-child(2){
    opacity: 0;
  }
  i.nav-bar.on span:nth-child(3){
    top: 9px;
    transform: rotate(-45deg);
  }

  /* 面板打开时禁止背景滚动 */
  body.open{
    overflow: hidden;
  }
}