.app-header{box-sizing:border-box;z-index:100;background-color:#fff;border-bottom:1px solid #e5e7eb;justify-content:space-between;align-items:center;width:100%;height:52px;padding:0 5%;display:flex;position:fixed;top:0;left:0;box-shadow:0 1px 2px #0f172a0a}.header-left .logo{color:#3b82f6;align-items:center;gap:8px;text-decoration:none;display:inline-flex}.logo-mark{flex-shrink:0;width:18px;height:18px;display:block}.logo-wordmark{color:#3b82f6;letter-spacing:.01em;font-size:15px;font-weight:500;line-height:1}.header-right{align-items:center;gap:16px;display:flex}.menu-item{color:#4b5563;padding:4px 0;font-size:13px;font-weight:500;text-decoration:none;transition:color .15s}.menu-item:hover{color:#3b82f6}.language-selector{background-color:#f9fafb;border:1px solid #e5e7eb;border-radius:999px;align-items:center;gap:6px;padding:3px 8px;display:flex}.language-icon{font-size:14px;line-height:1}.language-select{color:#374151;cursor:pointer;background:0 0;border:none;outline:none;font-size:13px}.page-box{color:#4b5563;width:50%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.6}.page-box ul{padding-left:20px}.footer{text-align:left;color:#6b7280;clear:both;width:100%;margin-top:48px;padding:16px 5%;font-size:12px;text-decoration:none}.footer a{color:#4b5563;text-decoration:none}.footer a:hover{color:#3b82f6}