*{
      margin:0;
      padding:0;
      box-sizing:border-box;
    }

    body{
      font-family:"PingFang SC","Microsoft YaHei",sans-serif;
      background:#f5f7fb;
      color:#222;
      line-height:1.7;
      overflow-x:hidden;
    }

    a{
      text-decoration:none;
      color:inherit;
    }

    .container{
      width:1200px;
      max-width:95%;
      margin:auto;
    }

    .topbar{
      background:#fff;
      border-bottom:1px solid #eee;
      padding:10px 0;
    }

    .topbar-inner{
      display:flex;
      justify-content:space-between;
      align-items:center;
      font-size:14px;
      color:#666;
    }

    .logo-area{
      display:flex;
      align-items:center;
      gap:15px;
      padding:25px 0;
    }

    .logo{
      width:70px;
      height:70px;
      border-radius:50%;
      
      display:flex;
      align-items:center;
      justify-content:center;
      color:#fff;
      font-size:28px;
      font-weight:bold;
      flex-shrink:0;
    }

    .brand h1{
      font-size:34px;
      color:#111827;
      margin-bottom:6px;
    }

    .brand p{
      color:#64748b;
      font-size:15px;
    }

    .phone{
      margin-left:auto;
      font-size:36px;
      color:#dc2626;
      font-weight:bold;
    }

    nav{
      background:linear-gradient(90deg,#0284c7,#2563eb);
      box-shadow:0 2px 10px rgba(0,0,0,.08);
    }

    .nav-menu{
      display:flex;
      flex-wrap:wrap;
      list-style:none;
    }

    .nav-menu li{
      position:relative;
    }

    .nav-menu li a{
      display:block;
      padding:16px 22px;
      color:#fff;
      font-weight:500;
      transition:.3s;
    }

    .nav-menu li a:hover{
      background:rgba(255,255,255,.12);
    }

    .dropdown-menu{
      position:absolute;
      top:100%;
      left:0;
      min-width:240px;
      background:#fff;
      box-shadow:0 10px 30px rgba(0,0,0,.12);
      border-radius:0 0 12px 12px;
      opacity:0;
      visibility:hidden;
      transform:translateY(10px);
      transition:.3s;
      z-index:999;
      padding:10px 0;
    }

    .dropdown-menu a{
      display:block;
      padding:12px 18px;
      color:#334155 !important;
      font-size:14px;
      transition:.3s;
    }

    li .dropdown-menu a:hover{
      background:#eff6ff;
      color:#2563eb !important;
    }

    .dropdown:hover .dropdown-menu{
      opacity:1;
      visibility:visible;
      transform:translateY(0);
    }

    /* HERO */

    .hero{
      background:linear-gradient(135deg,#02133d,#052c85);
      padding:70px 0;
      color:#fff;
    }

    .hero-grid{
      display:grid;
      grid-template-columns:1.2fr .8fr;
      gap:50px;
      align-items:center;
    }

    .hero h2{
      font-size:58px;
      line-height:1.3;
      margin-bottom:20px;
    }

    .hero p{
      font-size:20px;
      color:rgba(255,255,255,.82);
      margin-bottom:30px;
    }

    .hero-tags{
      display:flex;
      flex-wrap:wrap;
      gap:15px;
      margin-bottom:35px;
    }

    .hero-tags span{
      background:rgba(255,255,255,.08);
      padding:12px 20px;
      border-radius:40px;
      font-size:14px;
    }

    .hero-buttons{
      display:flex;
      gap:18px;
      flex-wrap:wrap;
    }
@media screen and (max-width: 1221px) {    
.hero-buttons{
      display:flex;
      gap:18px;
      flex-wrap:wrap;
      padding-left: 23%;
    }
}
    .btn{
      padding:14px 28px;
      border-radius:10px;
      font-weight:600;
      transition:.3s;
    }

    .btn-primary{
      background:#2563eb;
      color:#fff;
    }

    .btn-secondary{
      border:1px solid rgba(255,255,255,.3);
      color:#fff;
    }

    .btn:hover{
      transform:translateY(-2px);
    }

    .ai-box{
      display:grid;
      gap:18px;
    }
.ai-box img{
      width:100%
      
    }
    .ai-item{
      background:rgba(255,255,255,.08);
      backdrop-filter:blur(8px);
      padding:20px;
      border-radius:16px;
      font-size:26px;
      font-weight:700;
    }

    .main-section{
      padding:40px 0;
    }

    .main-grid{
      display:grid;
      grid-template-columns:260px 1fr 320px;
      gap:24px;
      align-items:start;
    }

    .sidebar,
    .content-box,
    .right-box{
      background:#fff;
      border-radius:14px;
      box-shadow:0 4px 20px rgba(0,0,0,.05);
      overflow:hidden;
    }

    .sidebar-title,
    .box-title{
      padding:20px;
      border-bottom:1px solid #edf2f7;
      font-size:24px;
      font-weight:700;
      color:#111827;
    }

    .sidebar-links a{
      display:flex;
      justify-content:space-between;
      padding:14px 20px;
      color:#334155;
      transition:.3s;
    }

    .sidebar-links a:hover{
      background:#f8fafc;
      color:#2563eb;
    }

    .solution-grid{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:20px;
      padding:25px;
    }

    .solution-card{
      border:1px solid #edf2f7;
      border-radius:14px;
      padding:15px;
      transition:.3s;
    }

    .solution-card:hover{
      transform:translateY(-4px);
      box-shadow:0 10px 30px rgba(37,99,235,.08);
    }

    .solution-card h3{
      font-size:20px;
      color:#2563eb;
      margin-bottom:12px;
    }

    .solution-card p{
      color:#64748b;
      font-size:14px;
    }

    .right-content{
      padding:24px;
    }

    .right-content a{
      display:block;
      margin-bottom:16px;
      color:#334155;
      transition:.3s;
    }

    .right-content a:hover{
      color:#2563eb;
    }

    .tools-section{
      padding:20px 0 50px;
    }

    .section-title{
      font-size:34px;
      margin-bottom:28px;
      color:#111827;
    }

    .tool-grid{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:24px;
    }

    .tool-card{
      background:#fff;
      border:1px solid #e5e7eb;
      border-radius:14px;
      padding:28px;
      text-align:center;
      transition:.3s;
    }

    .tool-card:hover{
      transform:translateY(-4px);
      box-shadow:0 10px 30px rgba(37,99,235,.08);
    }

    .tool-card h3{
      font-size:22px;
      margin-bottom:12px;
      color:#2563eb;
    }

    .tool-card p{
      color:#64748b;
      font-size:14px;
    }

    footer{
      background:#0f172a;
      color:rgba(255,255,255,.75);
      padding:50px 0 30px;
    }

    .footer-grid{
      display:grid;
      grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
      gap:30px;
    }

    .footer-col h3{
      color:#fff;
      margin-bottom:16px;
      font-size:18px;
    }

    .footer-col a{
      display:block;
      margin-bottom:10px;
      color:rgba(255,255,255,.7);
      font-size:14px;
    }

    .copyright{
      text-align:center;
      margin-top:35px;
      padding-top:20px;
      border-top:1px solid rgba(255,255,255,.08);
      font-size:13px;
    }

    /* 响应式 */

    @media(max-width:960px){

      .hero-grid{
        grid-template-columns:1fr;
      }

      .main-grid{
        grid-template-columns:1fr;
      }

      .solution-grid{
        grid-template-columns:repeat(2,1fr);
      }

      .tool-grid{
        grid-template-columns:repeat(2,1fr);
      }

      .hero h2{
        font-size:40px;
      }

    }

    @media(max-width:640px){

      .topbar{
        display:none;
      }

      .container{
        max-width:100%;
        padding:0 14px;
      }

      .logo-area{
        flex-direction:row;
        align-items:center;
        flex-wrap:nowrap;
		padding:25px 13px;
      }

      .logo{
        width: 60px;
        height: 60px;
        min-width: 60px;
        font-size: 24px;
      }

      .brand h1{
        font-size:24px;
        line-height:1.2;
      }

      .brand p{
        font-size:13px;
      }

      .phone{
        display:none;
      }

      .nav-menu{
        overflow-x:auto;
        flex-wrap:nowrap;
        white-space:nowrap;
      }

      .nav-menu::-webkit-scrollbar{
        display:none;
      }

      .nav-menu li a{
        padding:12px 14px;
        font-size:14px;
      }

      .dropdown-menu{
        display:none !important;
      }

      .hero{
        padding:40px 0;
      }

      .hero h2{
        font-size:28px;
      }

      .hero p{
        font-size:14px;
      }

      .solution-grid{
        grid-template-columns:1fr;
      }

      .tool-grid{
        grid-template-columns:1fr;
      }

      .footer-grid{
        grid-template-columns:repeat(2,1fr);
      }

      .sidebar-links{
        display:none;
      }

      .sidebar.active .sidebar-links{
        display:block;
      }

      .sidebar-title{
        position:relative;
        cursor:pointer;
      }

      .sidebar-title::after{
        content:"+";
        position:absolute;
        right:20px;
        top:50%;
        transform:translateY(-50%);
        font-size:24px;
        color:#2563eb;
      }

      .sidebar.active .sidebar-title::after{
        content:"−";
      }

    }