:root{--brand:#0071ce;--brand-dark:#005aa3;--accent:#f5f7fb;--text:#222;--muted:#666;--line:#eaeaea;--radius:14px;--shadow:0 8px 24px rgba(0,0,0,.06);--gutter:clamp(16px,4.5vw,28px)}
    *{box-sizing:border-box}html,body{height:100%}body{margin:0;color:var(--text);font:14px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:#fff;overflow-x:hidden}
    .topbar{background:var(--brand);color:#fff}
    .wrap{max-width:1160px;margin:0 auto;padding:0 var(--gutter)}
    .topbar .inner{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 0;flex-wrap:nowrap}
    .brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:#fff;white-space:nowrap;min-width:0}
    .brand img{height:28px;width:auto;display:block}.brand span{font-weight:700;font-size:18px;line-height:1}
    nav{flex:1 1 auto;min-width:0}
    nav ul{display:flex;gap:18px;list-style:none;margin:0;padding:0;justify-content:flex-end;white-space:nowrap}
    nav a{color:#fff;text-decoration:none;font-size:14px;opacity:.95;padding:8px 10px;border-radius:8px;transition:.2s;display:inline-block}
    nav a:hover{background:rgba(255,255,255,.12)}
    .crumb{background:var(--accent);border-bottom:1px solid var(--line)}
    .crumb .inner{padding:10px 0;font-size:13px;color:#555;display:flex;flex-wrap:wrap;gap:8px;align-items:center}
    .crumb a{color:var(--brand);text-decoration:none}.crumb .sep{color:#aaa}
    .hero{padding:24px 0 8px}.hero h1{margin:0 0 8px;font-size:22px;line-height:1.35}.hero p{margin:0;color:var(--muted)}
    .grid{display:grid;grid-template-columns:1.1fr .9fr;gap:22px;margin:18px 0 34px}
    .card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
    .card .hd{padding:14px 16px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between}
    .card .hd h2{margin:0;font-size:16px}.card .bd{padding:16px}
    .form{display:grid;gap:14px}.form .row{display:grid;gap:8px}.form label{font-size:13px;color:#333}
    .form input[type="text"],.form input[type="password"]{height:42px;border:1px solid var(--line);border-radius:10px;padding:0 12px;font-size:14px;outline:none;transition:.18s;background:#fff;width:100%}
    .form input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(0,113,206,.08)}.form .muted{font-size:12px;color:#888}
    .captcha-line{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;align-items:center}
    .captcha-box{display:flex;align-items:center;gap:10px}
    .captcha-canvas{border:1px solid var(--line);border-radius:8px;background:#fdfdfd;width:110px;height:42px;max-width:100%}
    .btn{display:inline-block;height:44px;line-height:44px;padding:0 18px;border-radius:12px;border:0;cursor:pointer;font-weight:600;background:var(--brand);color:#fff;transition:.2s}
    .btn:hover{background:var(--brand-dark)}.btn.ghost{background:#fff;color:var(--brand);border:1px solid var(--brand)}
    .feat-list{display:grid;gap:10px}
    .feat{display:flex;gap:10px;align-items:flex-start;padding:10px 12px;border:1px solid var(--line);border-radius:12px;background:#fcfcfc}
    .feat i{inline-size:8px;block-size:8px;border-radius:50%;background:#0071ce;margin-top:7px;flex:0 0 8px}
    .notice{margin-top:12px;font-size:12px;color:#555;background:#fff8f8;border:1px solid #ffd2d2;border-radius:12px;padding:10px 12px}
    .acc{margin:8px auto 28px}.acc-title{margin:0 0 10px;font-size:16px}
    .acc-item{border:1px solid var(--line);border-radius:12px;background:#fff;box-shadow:var(--shadow);overflow:hidden;margin-bottom:12px}
    .acc-head{cursor:pointer;list-style:none;margin:0;padding:14px 16px;font-weight:600;color:#222;display:flex;align-items:center;justify-content:space-between}
    .acc-head::-webkit-details-marker{display:none}
    .acc-head::after{content:"▼";font-size:12px;transform:rotate(-90deg);transition:transform .2s ease;color:#999}
    .acc-item[open] .acc-head::after{transform:rotate(0deg)}
    .acc-body{padding:0 16px 14px;color:#555;font-size:14px;border-top:1px solid var(--line);background:#fff}
    .acc-list{margin:8px 0 8px 18px;padding:0}.acc-list li{margin:6px 0}
    .acc-steps{margin:8px 0 8px 18px;padding:0}.acc-steps li{margin:6px 0}
    .acc-tip{margin-top:8px;font-size:12px;color:#666;background:#fafbff;border:1px dashed #dfe6f7;border-radius:8px;padding:8px 10px}
    footer.beian{background:#0a73c9;color:#fff}
    .beian .beian-inner{max-width:1160px;margin:0 auto;padding:12px clamp(12px,4vw,24px);text-align:center;font-size:14px;line-height:1.7}
    .beian a{color:#fff;text-decoration:none}.beian a:hover{background:transparent;text-decoration:underline}.beian .sep{margin:0 6px}
    .beian .badge{display:inline-flex;align-items:center;gap:6px}
    .beian .badge svg{width:16px;height:16px;color:#ffcc00;vertical-align:-2px}
    @media (max-width:560px){
      .topbar .inner{align-items:flex-start;flex-wrap:wrap;row-gap:10px}
      .topbar .wrap,.crumb .wrap{padding-left:calc(clamp(16px,5vw,28px) + env(safe-area-inset-left,0px))!important;padding-right:calc(clamp(16px,5vw,28px) + env(safe-area-inset-right,0px))!important}
      .brand{flex:0 0 100%;gap:12px}.brand img{height:28px}.brand span{font-size:18px}
      .topbar nav{order:2;flex:0 0 100%;text-align:center}
      .topbar nav ul{display:flex;flex-wrap:wrap;gap:14px 18px;justify-content:center}
      .grid{grid-template-columns:1fr}
      .captcha-canvas{width:96px;height:40px}
      .captcha-box .btn{font-size:12px;padding:6px 10px;line-height:1}
    }
    .modal{position:fixed;inset:0;background:rgba(0,0,0,.45);display:none;align-items:center;justify-content:center;z-index:9999}
    .modal.show{display:flex}
    .modal-card{background:#fff;border-radius:14px;max-width:360px;width:86%;padding:18px 16px;box-shadow:var(--shadow);text-align:center}
    .modal-msg{font-size:16px;color:#222;margin:6px 0 14px}
    .modal-btn{display:inline-block;background:var(--brand);color:#fff;border:0;border-radius:12px;padding:10px 18px;cursor:pointer;font-weight:600}
    .modal-btn:hover{background:var(--brand-dark)}