:root{
      --theme:#0B3D91;
      --template-theme:{主题色};
      --theme-dark:#072a65;
      --theme-soft:#eaf1fb;
      --green:#287a4b;
      --green-soft:#e8f4ec;
      --wood:#a66d3b;
      --wood-soft:#f2e3d2;
      --ink:#172033;
      --muted:#657086;
      --line:#dfe4ec;
      --surface:#ffffff;
      --page:#f5f7fa;
      --shadow:0 14px 36px rgba(19,38,67,.09);
      --container:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:var(--page);
      font-family:"Microsoft YaHei","PingFang SC","Noto Sans SC",Arial,sans-serif;
      font-size:15px;
      line-height:1.7;
    }
    body,button,input,textarea{font-family:inherit}
    img{display:block;max-width:100%}
    a{color:inherit;text-decoration:none}
    button{color:inherit}
    .container{width:min(var(--container),calc(100% - 40px));margin:0 auto}

    .topbar{
      background:#10233f;
      color:#dbe5f4;
      font-size:13px;
    }
    .topbar .container{
      min-height:36px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:24px;
    }
    .topbar a{color:#fff}
    .topbar a:hover{text-decoration:underline}

    .header{
      position:relative;
      z-index:50;
      background:rgba(255,255,255,.98);
      border-bottom:1px solid var(--line);
      box-shadow:0 4px 18px rgba(25,42,70,.05);
    }
    .header-inner{
      min-height:76px;
      display:flex;
      align-items:center;
      gap:24px;
    }
    .logo{
      min-width:0;
      display:flex;
      align-items:center;
      gap:10px;
      color:var(--theme);
      font-size:19px;
      font-weight:800;
      white-space:nowrap;
    }
    .logo img{
      width:42px;
      height:42px;
      object-fit:contain;
      border-radius:6px;
      background:#fff;
    }
    .main-nav{align-self:stretch;margin-left:auto}
    .nav-list{
      height:100%;
      display:flex;
      align-items:stretch;
      gap:2px;
      margin:0;
      padding:0;
      list-style:none;
    }
    .nav-list>li{
      position:relative;
      display:flex;
      align-items:stretch;
    }
    .nav-link{
      display:flex;
      align-items:center;
      padding:0 12px;
      color:#303a4d;
      font-size:14px;
      font-weight:700;
      white-space:nowrap;
      transition:color .2s,background .2s;
    }
    .nav-link:hover,
    .nav-list>li:focus-within>.nav-link,
    .nav-list>li:hover>.nav-link{
      color:var(--theme);
      background:var(--theme-soft);
    }
    .has-arrow::after{
      content:"";
      width:6px;
      height:6px;
      margin:0 0 4px 7px;
      border-right:1.5px solid currentColor;
      border-bottom:1.5px solid currentColor;
      transform:rotate(45deg);
    }
    .dropdown-panel,
    .mega-menu{
      position:absolute;
      top:100%;
      left:0;
      visibility:hidden;
      opacity:0;
      transform:translateY(8px);
      pointer-events:none;
      background:#fff;
      border:1px solid var(--line);
      border-top:3px solid var(--theme);
      box-shadow:var(--shadow);
      transition:opacity .18s,transform .18s,visibility .18s;
    }
    .dropdown-panel::before,
    .mega-menu::before{
      content:"";
      position:absolute;
      right:0;
      bottom:100%;
      left:0;
      height:8px;
    }
    .dropdown-panel{
      width:310px;
      padding:18px;
    }
    .mega-menu{
      left:50%;
      width:min(760px,calc(100vw - 40px));
      padding:20px;
      transform:translate(-50%,8px);
    }
    .nav-list>li:nth-last-child(-n+3) .mega-menu{
      right:0;
      left:auto;
      transform:translateY(8px);
    }
    .nav-list>li:hover>.dropdown-panel,
    .nav-list>li:focus-within>.dropdown-panel,
    .nav-list>li:hover>.mega-menu,
    .nav-list>li:focus-within>.mega-menu{
      visibility:visible;
      opacity:1;
      transform:translateY(0);
      pointer-events:auto;
    }
    .nav-list>li:hover>.mega-menu,
    .nav-list>li:focus-within>.mega-menu{
      transform:translate(-50%,0);
    }
    .nav-list>li:nth-last-child(-n+3):hover .mega-menu,
    .nav-list>li:nth-last-child(-n+3):focus-within .mega-menu{
      transform:translateY(0);
    }
    .drop-title,.mega-title{
      margin:0 0 10px;
      color:var(--ink);
      font-size:13px;
      font-weight:800;
    }
    .drop-item{
      display:block;
      padding:9px 10px;
      border-radius:4px;
      color:#4d586c;
      font-size:13px;
      line-height:1.45;
    }
    .drop-item:hover{color:var(--theme);background:var(--theme-soft)}
    .mega-grid{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:8px;
    }
    .mega-card{
      min-width:0;
      display:flex;
      align-items:center;
      gap:11px;
      padding:10px;
      border:1px solid #edf0f5;
      border-radius:6px;
      transition:border-color .2s,background .2s;
    }
    .mega-card:hover{border-color:#b9c9e3;background:#f7faff}
    .mega-card>img{
      flex:0 0 auto;
      width:44px;
      height:44px;
      object-fit:cover;
      border-radius:5px;
      background:#eef2f7;
    }
    .mega-card>span{min-width:0}
    .mega-card strong,
    .mega-card span span{
      display:block;
      overflow:hidden;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .mega-card strong{color:#273247;font-size:13px}
    .mega-card span span{color:var(--muted);font-size:11px}
    .mega-footer{
      display:block;
      margin-top:14px;
      padding:10px;
      color:var(--theme);
      background:var(--theme-soft);
      border-radius:4px;
      font-size:13px;
      font-weight:800;
      text-align:center;
    }
    .header-btns{
      flex:0 0 auto;
      display:flex;
      align-items:center;
      gap:8px;
    }
    .member-btn,.open-btn{
      min-height:38px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      padding:7px 13px;
      border-radius:5px;
      font-size:13px;
      font-weight:800;
    }
    .member-btn{color:var(--theme);border:1px solid #b8c8e3}
    .open-btn{color:#fff;background:var(--theme);border:1px solid var(--theme)}
    .member-btn:hover{background:var(--theme-soft)}
    .open-btn:hover{background:var(--theme-dark)}
    .hamburger{
      width:42px;
      height:42px;
      display:none;
      align-items:center;
      justify-content:center;
      flex-direction:column;
      gap:5px;
      padding:0;
      border:1px solid var(--line);
      border-radius:5px;
      background:#fff;
      cursor:pointer;
    }
    .hamburger span{
      width:19px;
      height:2px;
      background:var(--ink);
      transition:transform .2s,opacity .2s;
    }
    .hamburger.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

    .drawer-overlay{
      position:fixed;
      z-index:80;
      inset:0;
      visibility:hidden;
      opacity:0;
      background:rgba(11,19,33,.55);
      transition:opacity .25s,visibility .25s;
    }
    .drawer-overlay.open{visibility:visible;opacity:1}
    .mobile-drawer{
      position:fixed;
      z-index:90;
      top:0;
      right:0;
      bottom:0;
      width:min(390px,88vw);
      overflow-y:auto;
      background:#fff;
      box-shadow:-12px 0 40px rgba(15,28,50,.2);
      transform:translateX(102%);
      transition:transform .25s ease;
    }
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{
      min-height:72px;
      display:flex;
      align-items:center;
      gap:12px;
      padding:14px 18px;
      color:#fff;
      background:var(--theme);
    }
    .drawer-head>span{min-width:0;font-weight:800}
    .drawer-head>a{
      margin-left:auto;
      padding:6px 12px;
      border:1px solid rgba(255,255,255,.5);
      border-radius:4px;
      font-size:13px;
    }
    .drawer-close{
      width:36px;
      height:36px;
      padding:0;
      color:#fff;
      background:transparent;
      border:0;
      font-size:28px;
      line-height:1;
      cursor:pointer;
    }
    .drawer-menu{padding:10px 18px 30px}
    .drawer-link,.drawer-toggle{
      width:100%;
      min-height:48px;
      display:flex;
      align-items:center;
      padding:10px 4px;
      background:#fff;
      border:0;
      border-bottom:1px solid var(--line);
      font-size:15px;
      font-weight:700;
      text-align:left;
      cursor:pointer;
    }
    .drawer-toggle::after{
      content:"+";
      margin-left:auto;
      color:var(--theme);
      font-size:20px;
      font-weight:400;
    }
    .drawer-toggle.active::after{content:"−"}
    .drawer-submenu{
      display:none;
      padding:7px 0 9px 14px;
      background:#f7f9fc;
      border-bottom:1px solid var(--line);
    }
    .drawer-submenu.open{display:block}
    .drawer-submenu a{
      display:block;
      padding:8px 10px;
      color:#556176;
      font-size:13px;
    }
    .drawer-submenu a:hover{color:var(--theme)}

    .about-page{overflow:hidden}
    .about-page .about-intro{
      position:relative;
      padding:76px 0 68px;
      color:#fff;
      background:
        linear-gradient(rgba(7,42,101,.94),rgba(11,61,145,.93)),
        repeating-linear-gradient(90deg,transparent 0,transparent 79px,rgba(255,255,255,.08) 80px);
    }
    .about-page .about-intro::after{
      content:"";
      position:absolute;
      right:0;
      bottom:0;
      left:0;
      height:5px;
      background:linear-gradient(90deg,var(--wood) 0 34%,var(--green) 34% 67%,#fff 67% 100%);
    }
    .about-page .intro-kicker{
      display:inline-flex;
      align-items:center;
      gap:9px;
      margin-bottom:17px;
      color:#cfe0fa;
      font-size:13px;
      font-weight:800;
    }
    .about-page .intro-kicker::before{
      content:"";
      width:32px;
      height:3px;
      background:#7eaaee;
    }
    .about-page .about-intro h1{
      max-width:860px;
      margin:0;
      font-size:clamp(35px,5vw,62px);
      line-height:1.18;
      letter-spacing:0;
    }
    .about-page .about-intro p{
      max-width:760px;
      margin:23px 0 0;
      color:#dbe7f8;
      font-size:17px;
    }
    .about-page .intro-links{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:30px;
    }
    .about-page .intro-links a{
      min-height:43px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      padding:9px 18px;
      border-radius:5px;
      font-weight:800;
    }
    .about-page .intro-links a:first-child{color:var(--theme);background:#fff}
    .about-page .intro-links a:last-child{color:#fff;border:1px solid rgba(255,255,255,.45)}
    .about-page .section{padding:72px 0}
    .about-page .section-white{background:#fff}
    .about-page .section-soft{background:#eef2f6}
    .about-page .section-heading{
      max-width:760px;
      margin-bottom:34px;
    }
    .about-page .section-heading.center{
      margin-right:auto;
      margin-left:auto;
      text-align:center;
    }
    .about-page .eyebrow{
      display:block;
      margin-bottom:7px;
      color:var(--green);
      font-size:13px;
      font-weight:900;
    }
    .about-page .section-heading h2{
      margin:0;
      color:#19243a;
      font-size:32px;
      line-height:1.3;
      letter-spacing:0;
    }
    .about-page .section-heading p{margin:13px 0 0;color:var(--muted)}
    .about-page .mission-grid{
      display:grid;
      grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
      gap:52px;
      align-items:start;
    }
    .about-page .mission-copy{
      min-width:0;
      padding-top:5px;
    }
    .about-page .mission-copy h2{
      margin:0 0 18px;
      font-size:34px;
      line-height:1.3;
      letter-spacing:0;
    }
    .about-page .mission-copy p{margin:0 0 14px;color:#586479}
    .about-page .principle-list{
      display:grid;
      gap:12px;
      margin-top:25px;
    }
    .about-page .principle{
      display:flex;
      gap:13px;
      align-items:flex-start;
      padding:15px 16px;
      border-left:4px solid var(--green);
      background:var(--green-soft);
    }
    .about-page .principle strong{
      display:block;
      margin-bottom:2px;
      color:#1c5334;
    }
    .about-page .principle span{color:#4b6557;font-size:13px}
    .about-page .scope-board{
      padding:12px;
      background:var(--wood-soft);
      border:1px solid #dfc2a3;
      box-shadow:var(--shadow);
    }
    .about-page .scope-head{
      padding:15px 17px;
      color:#fff;
      background:var(--wood);
      font-weight:900;
    }
    .about-page .scope-row{
      display:grid;
      grid-template-columns:78px 1fr;
      gap:14px;
      align-items:center;
      padding:17px;
      background:#fff;
      border-bottom:1px solid #eadfD4;
    }
    .about-page .scope-row:last-child{border-bottom:0}
    .about-page .scope-row b{
      color:var(--green);
      font-size:13px;
    }
    .about-page .scope-row strong{display:block;color:#253047}
    .about-page .scope-row span{display:block;color:var(--muted);font-size:13px}

    .about-page .service-grid{
      display:grid;
      grid-template-columns:repeat(4,minmax(0,1fr));
      gap:18px;
    }
    .about-page .service-card{
      min-width:0;
      padding:25px 22px;
      background:#fff;
      border:1px solid var(--line);
      border-top:4px solid var(--theme);
      border-radius:6px;
      transition:transform .2s,box-shadow .2s;
    }
    .about-page .service-card:nth-child(2){border-top-color:var(--green)}
    .about-page .service-card:nth-child(3){border-top-color:var(--wood)}
    .about-page .service-card:nth-child(4){border-top-color:#bb3b42}
    .about-page .service-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .about-page .service-number{
      color:#aab4c4;
      font-size:12px;
      font-weight:900;
    }
    .about-page .service-card h3{margin:17px 0 9px;font-size:19px}
    .about-page .service-card p{margin:0;color:var(--muted);font-size:14px}

    .about-page .process{
      position:relative;
      display:grid;
      grid-template-columns:repeat(4,minmax(0,1fr));
      gap:0;
      margin-top:12px;
    }
    .about-page .process::before{
      content:"";
      position:absolute;
      top:28px;
      right:11%;
      left:11%;
      height:2px;
      background:#cbd5e4;
    }
    .about-page .process-step{
      position:relative;
      z-index:1;
      padding:0 22px;
      text-align:center;
    }
    .about-page .step-dot{
      width:57px;
      height:57px;
      display:flex;
      align-items:center;
      justify-content:center;
      margin:0 auto 18px;
      color:#fff;
      background:var(--theme);
      border:7px solid #e9f0fb;
      border-radius:50%;
      font-weight:900;
    }
    .about-page .process-step:nth-child(2) .step-dot{background:var(--wood);border-color:var(--wood-soft)}
    .about-page .process-step:nth-child(3) .step-dot{background:var(--green);border-color:var(--green-soft)}
    .about-page .process-step:nth-child(4) .step-dot{background:#26354d;border-color:#e6e9ee}
    .about-page .process-step h3{margin:0 0 7px;font-size:17px}
    .about-page .process-step p{margin:0;color:var(--muted);font-size:13px}

    .about-page .standards-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:20px;
    }
    .about-page .standard-card{
      padding:26px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:6px;
    }
    .about-page .standard-mark{
      width:42px;
      height:42px;
      display:flex;
      align-items:center;
      justify-content:center;
      margin-bottom:17px;
      color:var(--theme);
      background:var(--theme-soft);
      border-radius:50%;
      font-size:20px;
      font-weight:900;
    }
    .about-page .standard-card h3{margin:0 0 8px;font-size:18px}
    .about-page .standard-card p{margin:0;color:var(--muted);font-size:14px}

    .about-page .notice{
      display:grid;
      grid-template-columns:minmax(0,1fr) auto;
      gap:30px;
      align-items:center;
      padding:33px 36px;
      color:#fff;
      background:#17233a;
      border-left:6px solid var(--green);
    }
    .about-page .notice h2{margin:0 0 8px;font-size:25px;letter-spacing:0}
    .about-page .notice p{max-width:800px;margin:0;color:#cbd5e5}
    .about-page .notice a{
      min-height:44px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      padding:9px 19px;
      color:#fff;
      background:var(--theme);
      border-radius:5px;
      font-weight:800;
      white-space:nowrap;
    }

    .footer{
      color:#c7d1df;
      background:#101a2a;
    }
    .footer .container{padding-top:54px}
    .footer-grid{
      display:grid;
      grid-template-columns:1.5fr 1fr 1fr 1.1fr;
      gap:38px;
      padding-bottom:40px;
    }
    .footer-brand{margin-bottom:13px;color:#fff;font-size:21px;font-weight:900}
    .footer h3{margin:0 0 14px;color:#fff;font-size:15px}
    .footer p{margin:0 0 8px;color:#aeb9ca;font-size:13px}
    .footer a{
      display:block;
      width:max-content;
      max-width:100%;
      margin:0 0 8px;
      color:#bdc8d7;
      font-size:13px;
    }
    .footer a:hover{color:#fff}
    .footer-social{margin-top:16px}
    .footer-bottom{
      padding:20px 0;
      color:#929fb2;
      border-top:1px solid rgba(255,255,255,.1);
      font-size:12px;
      text-align:center;
    }

    @media (max-width:1180px){
      .main-nav{display:none}
      .header-inner{min-height:68px}
      .header-btns{margin-left:auto}
      .hamburger{display:flex}
    }
    @media (max-width:900px){
      .about-page .mission-grid{grid-template-columns:1fr;gap:32px}
      .about-page .service-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .about-page .standards-grid{grid-template-columns:1fr 1fr}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media (max-width:680px){
      .container{width:min(100% - 28px,var(--container))}
      .topbar .container{min-height:42px}
      .topbar .contact{display:none}
      .logo span{
        max-width:135px;
        overflow:hidden;
        text-overflow:ellipsis;
      }
      .member-btn{display:none}
      .open-btn{min-height:38px;padding:7px 11px}
      .about-page .about-intro{padding:52px 0 48px}
      .about-page .about-intro h1{font-size:36px}
      .about-page .about-intro p{font-size:15px}
      .about-page .section{padding:52px 0}
      .about-page .section-heading h2,
      .about-page .mission-copy h2{font-size:27px}
      .about-page .service-grid,
      .about-page .standards-grid{grid-template-columns:1fr}
      .about-page .scope-row{grid-template-columns:65px 1fr;padding:15px 13px}
      .about-page .process{grid-template-columns:1fr;gap:24px}
      .about-page .process::before{
        top:25px;
        bottom:25px;
        left:28px;
        width:2px;
        height:auto;
      }
      .about-page .process-step{
        display:grid;
        grid-template-columns:57px 1fr;
        column-gap:16px;
        padding:0;
        text-align:left;
      }
      .about-page .step-dot{grid-row:1 / 3;margin:0}
      .about-page .process-step h3{align-self:end}
      .about-page .notice{grid-template-columns:1fr;padding:27px 22px}
      .about-page .notice a{width:100%}
      .footer-grid{grid-template-columns:1fr;gap:27px}
      .footer .container{padding-top:42px}
    }
    @media (max-width:390px){
      .logo img{width:37px;height:37px}
      .logo span{max-width:105px;font-size:16px}
      .header-btns{gap:5px}
      .open-btn{font-size:12px}
      .about-page .about-intro h1{font-size:31px}
    }