:root{
      --主题色:#0B3D91;
      --墨色:#172235;
      --浅底:#f4f7fb;
      --边框:#dce5f0;
      --强调:#e7a62c;
      --白色:#fff;
      --阴影:0 16px 42px rgba(23,34,53,.09);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--墨色);background:var(--浅底);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button{font:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}

    .topbar{background:#101b2d;color:#dce7f6;font-size:13px}
    .topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-links{display:flex;gap:22px}
    .topbar a{color:#dce7f6}
    .topbar a:hover{color:#fff}

    .header{position:relative;z-index:20;background:rgba(255,255,255,.97);border-bottom:1px solid var(--边框)}
    .header-inner{height:76px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;min-width:190px;color:var(--主题色);font-weight:800;font-size:19px}
    .logo img{width:38px;height:38px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:center;justify-content:center;gap:4px;padding:0;margin:0;list-style:none}
    .nav-item{position:relative}
    .nav-link{display:block;padding:25px 13px;color:#26364c;font-size:15px;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--主题色)}
    .has-arrow:after{content:"⌄";font-size:12px;margin-left:5px;color:#738299}
    .dropdown-panel,.mega-menu{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(8px);width:360px;padding:20px;background:#fff;border:1px solid var(--边框);border-radius:0 0 12px 12px;box-shadow:var(--阴影);opacity:0;visibility:hidden;transition:.2s;z-index:30}
    .mega-menu{width:650px}
    .nav-item:hover>.dropdown-panel,.nav-item:focus-within>.dropdown-panel,.nav-item:hover>.mega-menu,.nav-item:focus-within>.mega-menu{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
    .drop-title,.mega-title{margin:0 0 13px;color:var(--主题色);font-size:14px;font-weight:800}
    .drop-list,.mega-links{display:grid;gap:8px}
    .drop-list a,.mega-links a{display:block;padding:8px 9px;border-radius:7px;font-size:13px}
    .drop-list a:hover,.mega-links a:hover{background:#edf3fb;color:var(--主题色)}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
    .mega-card{display:flex;gap:10px;align-items:flex-start;padding:10px;border:1px solid #e7edf5;border-radius:9px}
    .mega-card:hover{border-color:#9ab6dc;background:#f7faff}
    .mega-card img{width:32px;height:32px;object-fit:contain;border-radius:6px}
    .mega-card span{min-width:0}
    .mega-card strong,.mega-card small{display:block}
    .mega-card strong{font-size:13px;margin-bottom:2px}
    .mega-card small{font-size:11px;color:#75849a;line-height:1.5}
    .mega-columns{display:grid;grid-template-columns:1fr 1fr;gap:25px}
    .mega-footer{display:block;margin-top:15px;padding-top:12px;border-top:1px solid #edf1f6;color:var(--主题色);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:12px;white-space:nowrap}
    .member-btn{padding:8px 13px;background:var(--主题色);color:#fff;border-radius:7px;font-size:13px}
    .account-link{color:var(--主题色);font-size:14px}
    .hamburger{display:none;width:40px;height:38px;border:1px solid var(--边框);background:#fff;border-radius:7px;padding:8px;cursor:pointer}
    .hamburger span{display:block;height:2px;margin:4px 0;background:var(--墨色);transition:.2s}
    .hamburger.active span:nth-child(1){transform:translateY(6px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

    .drawer-overlay{position:fixed;inset:0;background:rgba(8,18,35,.52);opacity:0;visibility:hidden;transition:.2s;z-index:50}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:0;bottom:0;width:min(390px,88vw);background:#fff;transform:translateX(100%);transition:.25s;z-index:60;overflow:auto}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{height:68px;display:flex;align-items:center;gap:18px;padding:0 20px;border-bottom:1px solid var(--边框);color:var(--主题色)}
    .drawer-head strong{flex:1}
    .drawer-head a{font-size:14px}
    .drawer-close{border:0;background:none;font-size:28px;color:#77859a;cursor:pointer}
    .drawer-menu{padding:14px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid #eef2f6;background:transparent;text-align:left;color:#25364d;cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:#8b98a9}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:5px 0 7px 15px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:7px 0;color:#62748b;font-size:14px}

    .about-page{padding:0 0 70px}
    .about-hero{padding:76px 0 84px;background:linear-gradient(135deg,#eef4fc 0%,#fff 54%,#f7efe4 100%);border-bottom:1px solid var(--边框)}
    .about-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--主题色);font-size:13px;font-weight:800;letter-spacing:.08em}
    .about-kicker:before{content:"";width:28px;height:2px;background:var(--强调)}
    .about-hero h1{max-width:760px;margin:14px 0 18px;font-size:clamp(34px,5vw,62px);line-height:1.2;letter-spacing:-.04em}
    .about-hero p{max-width:700px;margin:0;color:#65758c;font-size:18px}
    .about-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
    .primary-action,.secondary-action{display:inline-flex;align-items:center;justify-content:center;padding:11px 20px;border-radius:7px;font-size:14px;font-weight:700}
    .primary-action{background:var(--主题色);color:#fff}
    .secondary-action{border:1px solid #b9c9dc;color:var(--主题色);background:#fff}
    .about-section{padding:72px 0 0}
    .section-heading{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:26px}
    .section-heading h2{margin:0;font-size:30px;line-height:1.25}
    .section-heading p{max-width:560px;margin:0;color:#718197}
    .value-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .value-card{padding:27px;background:#fff;border:1px solid var(--边框);border-radius:12px;box-shadow:0 8px 22px rgba(27,51,84,.04)}
    .value-number{display:inline-flex;width:38px;height:38px;align-items:center;justify-content:center;border-radius:50%;background:#e9f0fa;color:var(--主题色);font-weight:800}
    .value-card h3{margin:20px 0 8px;font-size:19px}
    .value-card p{margin:0;color:#6b7b91;font-size:14px}
    .timeline{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:18px;padding-top:25px}
    .timeline:before{content:"";position:absolute;top:43px;left:7%;right:7%;height:2px;background:#c9d8ea}
    .timeline-item{position:relative;padding:35px 20px 22px;background:#fff;border:1px solid var(--边框);border-radius:10px}
    .timeline-item:before{content:"";position:absolute;top:11px;left:20px;width:13px;height:13px;border:4px solid #fff;border-radius:50%;background:var(--强调);box-shadow:0 0 0 2px var(--强调)}
    .timeline-item strong{display:block;color:var(--主题色);font-size:15px}
    .timeline-item h3{margin:8px 0 7px;font-size:17px}
    .timeline-item p{margin:0;color:#6b7b91;font-size:13px}
    .trust-panel{display:grid;grid-template-columns:1.2fr .8fr;gap:28px;align-items:stretch}
    .trust-copy,.trust-list{padding:30px;background:#fff;border:1px solid var(--边框);border-radius:12px}
    .trust-copy h2{margin:0 0 13px;font-size:27px}
    .trust-copy p{margin:0;color:#687990}
    .trust-list{display:grid;gap:14px}
    .trust-list div{display:flex;gap:12px;align-items:flex-start;padding-bottom:14px;border-bottom:1px solid #edf1f6}
    .trust-list div:last-child{padding-bottom:0;border-bottom:0}
    .trust-list b{color:var(--主题色);font-size:14px}
    .trust-list span{color:#687990;font-size:13px}
    .footer{padding:52px 0 20px;background:#101b2d;color:#cbd7e7}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:30px}
    .footer-brand strong{display:block;color:#fff;font-size:20px;margin-bottom:12px}
    .footer p{margin:5px 0;color:#91a2b8;font-size:13px}
    .footer h3{margin:0 0 13px;color:#fff;font-size:15px}
    .footer-grid>div:not(.footer-brand) a{display:block;margin:5px 0;color:#aebed1;font-size:13px}
    .footer-grid a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:35px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);color:#8495aa;font-size:12px}

    @media(max-width:960px){
      .main-nav{display:none}
      .hamburger{display:block}
      .account-link{display:none}
      .header-inner{height:68px}
      .mega-menu{width:min(650px,calc(100vw - 40px))}
      .value-grid{grid-template-columns:1fr 1fr}
      .timeline{grid-template-columns:1fr 1fr}
      .timeline:before{display:none}
      .trust-panel{grid-template-columns:1fr}
    }
    @media(max-width:640px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{align-items:flex-start;padding:8px 0;flex-direction:column;gap:2px}
      .topbar-links{gap:12px;flex-wrap:wrap}
      .logo{min-width:0;font-size:16px}
      .logo img{width:32px;height:32px}
      .member-btn{display:none}
      .about-hero{padding:54px 0 58px}
      .about-hero p{font-size:16px}
      .section-heading{display:block}
      .section-heading p{margin-top:10px}
      .value-grid,.timeline{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr 1fr;gap:25px}
      .footer-brand{grid-column:1/-1}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin-top:6px}
    }