:root{
      --primary:#0B3D91;
      --primary-dark:#06275e;
      --primary-soft:#eaf1fc;
      --terminal:#0b1812;
      --green:#3de684;
      --amber:#f5b942;
      --ink:#14221a;
      --muted:#617066;
      --line:#dce6df;
      --paper:#f6f9f7;
      --white:#fff;
      --shadow:0 18px 50px rgba(15,44,29,.10);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#fff;font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.65}
    body,button,input{font:inherit}
    img{display:block;max-width:100%}
    a{color:inherit;text-decoration:none}
    button{color:inherit}
    .container{width:min(1200px,calc(100% - 40px));margin:0 auto}

    .topbar{background:#08150e;color:#c8d8cc;font-size:13px;border-bottom:1px solid rgba(61,230,132,.16)}
    .topbar .container{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .topbar strong{color:var(--green)}
    .topbar-links{display:flex;align-items:center;gap:20px}
    .topbar-links a{transition:.2s ease}
    .topbar-links a:hover{color:var(--green)}

    .header{position:relative;z-index:50;background:rgba(255,255,255,.98);border-bottom:1px solid var(--line);box-shadow:0 4px 18px rgba(16,52,31,.04)}
    .header-inner{min-height:78px;display:flex;align-items:center;gap:26px}
    .logo{display:flex;align-items:center;gap:10px;flex:none;color:var(--primary);font-weight:800;font-size:19px;white-space:nowrap}
    .logo img{width:42px;height:42px;object-fit:contain}
    .main-nav{align-self:stretch;display:flex;align-items:stretch;margin-left:auto}
    .nav-list{display:flex;align-items:stretch;list-style:none;margin:0;padding:0}
    .nav-item{position:relative;display:flex;align-items:stretch}
    .nav-link{display:flex;align-items:center;padding:0 13px;font-size:15px;font-weight:650;white-space:nowrap;transition:.2s ease}
    .nav-link:hover,.nav-item:focus-within>.nav-link{color:var(--primary)}
    .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%;visibility:hidden;opacity:0;transform:translateY(8px);pointer-events:none;background:#fff;border:1px solid var(--line);box-shadow:0 24px 60px rgba(9,36,20,.16);transition:.2s ease}
    .nav-item:hover>.dropdown-panel,.nav-item:focus-within>.dropdown-panel,.nav-item:hover>.mega-menu,.nav-item:focus-within>.mega-menu{visibility:visible;opacity:1;transform:translateY(0);pointer-events:auto}
    .dropdown-panel{left:0;width:310px;padding:18px;border-radius:0 0 14px 14px}
    .dropdown-panel>a{display:block;padding:10px 8px;border-top:1px solid #edf2ee;font-size:14px}
    .dropdown-panel>a:hover{color:var(--primary);background:var(--primary-soft)}
    .mega-menu{left:50%;width:min(780px,90vw);padding:22px;transform:translate(-50%,8px);border-radius:0 0 18px 18px}
    .nav-item:hover>.mega-menu,.nav-item:focus-within>.mega-menu{transform:translate(-50%,0)}
    .mega-title{margin:0 0 12px;color:#718078;font-size:12px;font-weight:800;letter-spacing:.08em}
    .mega-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
    .mega-card{display:flex;align-items:center;gap:11px;min-width:0;padding:10px;border:1px solid #e6eee8;border-radius:12px;background:#fbfdfb;transition:.2s ease}
    .mega-card:hover{border-color:#a9c1e7;background:var(--primary-soft);transform:translateY(-1px)}
    .mega-card img{width:42px;height:42px;flex:none;border-radius:9px;object-fit:cover;background:#eef3f0}
    .mega-card span{display:block;min-width:0}
    .mega-card b,.mega-card small{display:block;overflow:hidden;text-overflow:ellipsis}
    .mega-card b{font-size:14px;white-space:nowrap}
    .mega-card small{margin-top:2px;color:#68776e;font-size:11px;line-height:1.45}
    .mega-footer{display:block;margin-top:14px;padding-top:12px;border-top:1px solid var(--line);color:var(--primary);font-size:13px;font-weight:750;text-align:right}
    .header-btns{display:flex;align-items:center;gap:9px;flex:none}
    .member-link{font-size:14px;font-weight:700;color:var(--primary)}
    .account-btn{padding:10px 15px;border-radius:9px;color:#fff;background:var(--primary);font-size:14px;font-weight:750;box-shadow:0 8px 20px rgba(11,61,145,.18)}
    .account-btn:hover{background:var(--primary-dark)}
    .hamburger{display:none;width:42px;height:42px;padding:10px;border:1px solid var(--line);border-radius:9px;background:#fff;cursor:pointer}
    .hamburger span{display:block;height:2px;margin:5px 0;background:var(--ink);transition:.2s ease}
    .hamburger.active span:first-child{transform:translateY(7px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:last-child{transform:translateY(-7px) rotate(-45deg)}

    .drawer-overlay{position:fixed;inset:0;z-index:90;visibility:hidden;opacity:0;background:rgba(4,15,8,.58);transition:.25s ease}
    .drawer-overlay.open{visibility:visible;opacity:1}
    .mobile-drawer{position:fixed;top:0;right:0;z-index:100;width:min(390px,92vw);height:100%;overflow-y:auto;background:#fff;transform:translateX(105%);box-shadow:-20px 0 50px rgba(0,0,0,.18);transition:.28s ease}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{position:sticky;top:0;z-index:2;display:flex;align-items:center;gap:12px;padding:17px 20px;color:#fff;background:var(--primary-dark)}
    .drawer-head span{font-weight:700}
    .drawer-head>a{margin-left:auto;padding:6px 12px;border:1px solid rgba(255,255,255,.42);border-radius:7px}
    .drawer-close{width:34px;height:34px;padding:0;border:0;background:transparent;color:#fff;font-size:28px;line-height:1;cursor:pointer}
    .drawer-menu{padding:12px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 4px;border:0;border-bottom:1px solid var(--line);background:#fff;text-align:left;font-weight:750;cursor:pointer}
    .drawer-toggle{position:relative}
    .drawer-toggle::after{content:"+";position:absolute;right:5px;font-size:20px;font-weight:400}
    .drawer-toggle.active::after{content:"−"}
    .drawer-submenu{display:none;padding:7px 0 9px 14px;border-bottom:1px solid var(--line)}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:9px 8px;color:#59685f;font-size:14px;border-left:2px solid #dce7df}
    .drawer-submenu a:hover{color:var(--primary);border-left-color:var(--primary);background:var(--primary-soft)}

    .about-page{overflow:hidden;background:linear-gradient(180deg,#f8fbf9 0,#fff 30%)}
    .about-page .about-hero{position:relative;padding:92px 0 88px;color:#eef8f1;background:
      radial-gradient(circle at 16% 10%,rgba(61,230,132,.16),transparent 30%),
      radial-gradient(circle at 86% 80%,rgba(245,185,66,.12),transparent 25%),
      linear-gradient(145deg,#07150d,#0c2115 62%,#0b3d30)}
    .about-page .about-hero::before{content:"";position:absolute;inset:0;opacity:.16;background-image:linear-gradient(rgba(61,230,132,.22) 1px,transparent 1px),linear-gradient(90deg,rgba(61,230,132,.22) 1px,transparent 1px);background-size:46px 46px}
    .about-page .hero-inner{position:relative;z-index:1;text-align:center}
    .about-page .eyebrow{display:inline-flex;align-items:center;gap:9px;margin-bottom:20px;padding:7px 13px;border:1px solid rgba(61,230,132,.34);border-radius:999px;color:#9ff0bd;background:rgba(61,230,132,.07);font-size:13px;font-weight:750;letter-spacing:.08em}
    .about-page .eyebrow::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 14px var(--green)}
    .about-page h1{max-width:900px;margin:0 auto;font-size:clamp(38px,6vw,68px);line-height:1.12;letter-spacing:-.045em}
    .about-page .hero-lead{max-width:780px;margin:24px auto 0;color:#bed0c3;font-size:18px}
    .about-page .hero-facts{display:grid;grid-template-columns:repeat(3,1fr);max-width:920px;margin:48px auto 0;border:1px solid rgba(255,255,255,.12);border-radius:18px;background:rgba(255,255,255,.055);backdrop-filter:blur(12px)}
    .about-page .hero-fact{padding:22px 26px}
    .about-page .hero-fact+ .hero-fact{border-left:1px solid rgba(255,255,255,.12)}
    .about-page .hero-fact strong{display:block;color:#fff;font-size:18px}
    .about-page .hero-fact span{display:block;margin-top:5px;color:#8eaa98;font-size:13px}

    .about-page .section{padding:86px 0}
    .about-page .section-soft{background:var(--paper)}
    .about-page .section-head{max-width:760px;margin:0 auto 44px;text-align:center}
    .about-page .section-kicker{display:block;margin-bottom:10px;color:var(--primary);font-size:13px;font-weight:850;letter-spacing:.12em}
    .about-page .section-head h2{margin:0;font-size:clamp(30px,4vw,44px);line-height:1.2;letter-spacing:-.03em}
    .about-page .section-head p{margin:15px auto 0;color:var(--muted);font-size:16px}
    .about-page .mission-panel{display:grid;grid-template-columns:1.15fr .85fr;gap:28px;align-items:stretch}
    .about-page .mission-copy,.about-page .principle-board{border:1px solid var(--line);border-radius:24px;background:#fff;box-shadow:var(--shadow)}
    .about-page .mission-copy{padding:42px}
    .about-page .mission-copy h2{margin:0 0 18px;font-size:36px;line-height:1.25}
    .about-page .mission-copy p{margin:0 0 16px;color:var(--muted)}
    .about-page .mission-note{margin-top:28px;padding:18px 20px;border-left:4px solid var(--amber);border-radius:0 12px 12px 0;background:#fff8e8;color:#6d531d}
    .about-page .principle-board{padding:30px;color:#dcebe1;background:var(--terminal);border-color:#193628}
    .about-page .board-bar{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid rgba(61,230,132,.16);color:#91a99a;font-size:12px}
    .about-page .status{display:inline-flex;align-items:center;gap:7px;color:var(--green)}
    .about-page .status::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 10px var(--green)}
    .about-page .principle-list{display:grid;gap:13px;margin-top:22px}
    .about-page .principle{padding:15px 16px;border:1px solid rgba(61,230,132,.14);border-radius:12px;background:rgba(61,230,132,.04)}
    .about-page .principle b{display:block;color:var(--green);font-size:15px}
    .about-page .principle span{display:block;margin-top:3px;color:#96ab9d;font-size:13px}

    .about-page .service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
    .about-page .service-card{position:relative;min-height:245px;padding:28px;border:1px solid var(--line);border-radius:20px;background:#fff;transition:.25s ease}
    .about-page .service-card:hover{transform:translateY(-5px);border-color:#9bb6df;box-shadow:var(--shadow)}
    .about-page .service-num{display:flex;width:45px;height:45px;align-items:center;justify-content:center;margin-bottom:28px;border-radius:12px;color:#fff;background:var(--primary);font-weight:850}
    .about-page .service-card h3{margin:0 0 10px;font-size:20px}
    .about-page .service-card p{margin:0;color:var(--muted);font-size:14px}
    .about-page .service-card::after{content:"";position:absolute;right:24px;bottom:22px;width:34px;height:2px;background:var(--green)}

    .about-page .standards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
    .about-page .standard-card{padding:30px;border-radius:20px;background:#fff;border:1px solid var(--line)}
    .about-page .standard-icon{display:inline-flex;width:42px;height:42px;align-items:center;justify-content:center;margin-bottom:18px;border-radius:50%;color:var(--primary);background:var(--primary-soft);font-weight:900}
    .about-page .standard-card h3{margin:0 0 9px;font-size:19px}
    .about-page .standard-card p{margin:0;color:var(--muted);font-size:14px}

    .about-page .workflow{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:15px}
    .about-page .workflow::before{content:"";position:absolute;top:28px;left:11%;right:11%;height:1px;background:#b8c9bd}
    .about-page .workflow-item{position:relative;text-align:center}
    .about-page .workflow-dot{position:relative;z-index:1;display:flex;width:56px;height:56px;margin:0 auto 18px;align-items:center;justify-content:center;border:6px solid #fff;border-radius:50%;color:#fff;background:var(--primary);box-shadow:0 0 0 1px #b7c8bc;font-weight:850}
    .about-page .workflow-item h3{margin:0 0 6px;font-size:17px}
    .about-page .workflow-item p{margin:0;color:var(--muted);font-size:13px}

    .about-page .risk-box{display:grid;grid-template-columns:1fr auto;gap:35px;align-items:center;padding:42px 46px;border-radius:24px;color:#fff;background:linear-gradient(120deg,var(--primary-dark),var(--primary))}
    .about-page .risk-box h2{margin:0 0 10px;font-size:30px}
    .about-page .risk-box p{max-width:780px;margin:0;color:#c8d8ed}
    .about-page .risk-action{display:inline-flex;padding:13px 20px;border-radius:10px;color:#172116;background:var(--amber);font-weight:850;white-space:nowrap}
    .about-page .risk-action:hover{background:#ffd06b}

    .footer{padding:58px 0 0;color:#cad7ce;background:#07140c}
    .footer-grid{display:grid;grid-template-columns:1.45fr repeat(3,1fr);gap:44px}
    .footer h3{margin:0 0 14px;color:#fff;font-size:24px}
    .footer h4{margin:0 0 17px;color:#fff;font-size:15px}
    .footer p{color:#91a399}
    .footer a{display:block;margin:9px 0;color:#b7c6bc;font-size:14px;transition:.2s ease}
    .footer a:hover{color:var(--green)}
    .footer-brand p{max-width:310px}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:42px;padding:20px 0;border-top:1px solid rgba(255,255,255,.1);color:#7f9587;font-size:13px}

    @media (max-width:1120px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-inner{min-height:70px}
      .header-btns{margin-left:auto}
      .about-page .service-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:820px){
      .about-page .about-hero{padding:70px 0}
      .about-page .hero-facts{grid-template-columns:1fr}
      .about-page .hero-fact+.hero-fact{border-left:0;border-top:1px solid rgba(255,255,255,.12)}
      .about-page .mission-panel{grid-template-columns:1fr}
      .about-page .standards{grid-template-columns:1fr}
      .about-page .workflow{grid-template-columns:repeat(2,1fr);gap:32px}
      .about-page .workflow::before{display:none}
      .about-page .risk-box{grid-template-columns:1fr}
      .about-page .risk-action{justify-self:start}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:600px){
      .container{width:min(100% - 28px,1200px)}
      .topbar .container{padding:8px 0;align-items:flex-start;flex-direction:column;gap:3px}
      .topbar-links{gap:5px;align-items:flex-start;flex-direction:column}
      .logo span{max-width:125px;overflow:hidden;text-overflow:ellipsis}
      .member-link{display:none}
      .account-btn{padding:9px 11px}
      .about-page .about-hero{padding:58px 0}
      .about-page .hero-lead{font-size:16px}
      .about-page .section{padding:62px 0}
      .about-page .mission-copy{padding:27px}
      .about-page .mission-copy h2{font-size:29px}
      .about-page .principle-board{padding:24px}
      .about-page .service-grid{grid-template-columns:1fr}
      .about-page .service-card{min-height:0}
      .about-page .workflow{grid-template-columns:1fr}
      .about-page .risk-box{padding:30px 24px}
      .footer-grid{grid-template-columns:1fr;gap:24px}
      .footer-bottom{align-items:flex-start;flex-direction:column}
    }