:root {
            --lt-blue-deep: #0c1929;
            --lt-blue-mid: #1e3a8a;
            --lt-blue-bright: #2563eb;
            --lt-blue-glow: #38bdf8;
            --lt-violet: #8b5cf6;
            --lt-cyan: #22d3ee;
            --lt-card: rgba(255, 255, 255, 0.92);
            --lt-text: #0f172a;
            --lt-muted: #64748b;
        }
        @media (prefers-reduced-motion: reduce) {
            .login-card .login-remember-tick {
                transition: none !important;
            }
            .login-bg::after,
            .login-bg-orb,
            .login-bg-bloom span,
            .login-hero-blobs .blob,
            .login-card-top,
            .login-card-wrap::before,
            .login-brand h1,
            .btn-login-primary {
                animation: none !important;
            }
            .login-brand h1 {
                background: none !important;
                -webkit-text-fill-color: #fff !important;
                color: #fff !important;
            }
        }
        .login-tech {
            margin: 0;
            min-height: 100vh;
            font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
            background: var(--lt-blue-deep);
            color-scheme: dark;
        }
        .login-tech,
        .login-tech * {
            scrollbar-width: thin;
            scrollbar-color: rgba(56, 189, 248, 0.32) rgba(12, 25, 41, 0.55);
        }
        .login-tech *::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        .login-tech *::-webkit-scrollbar-track {
            background: rgba(12, 25, 41, 0.55);
        }
        .login-tech *::-webkit-scrollbar-thumb {
            background: rgba(56, 189, 248, 0.28);
            border-radius: 999px;
            border: 2px solid transparent;
            background-clip: padding-box;
        }
        .login-tech *::-webkit-scrollbar-thumb:hover {
            background: rgba(56, 189, 248, 0.48);
            border: 2px solid transparent;
            background-clip: padding-box;
        }
        .login-tech *::-webkit-scrollbar-corner {
            background: rgba(12, 25, 41, 0.55);
        }
        .login-shell {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 100vh;
            padding: 2rem 1.25rem;
            overflow: hidden;
        }
        @keyframes lt-glow-pulse {
            0%, 100% { opacity: 0.55; transform: scale(1); }
            50% { opacity: 0.9; transform: scale(1.06); }
        }
        @keyframes lt-blob-drift {
            0%, 100% { transform: translate(0, 0) scale(1); }
            33% { transform: translate(12px, -18px) scale(1.05); }
            66% { transform: translate(-10px, 10px) scale(0.98); }
        }
        @keyframes lt-shimmer {
            0% { background-position: -200% 0; }
            100% { background-position: 200% 0; }
        }
        @keyframes lt-panel-glow {
            0%, 100% { opacity: 0.4; }
            50% { opacity: 0.75; }
        }
        @keyframes lt-panel-sweep {
            0% { transform: translateX(-120%) skewX(-12deg); opacity: 0; }
            15% { opacity: 0.45; }
            55% { opacity: 0.3; }
            100% { transform: translateX(220%) skewX(-12deg); opacity: 0; }
        }
        @keyframes lt-card-halo {
            0%, 100% { opacity: 0.55; transform: scale(1); }
            50% { opacity: 0.9; transform: scale(1.04); }
        }
        @keyframes lt-border-flow {
            0% { background-position: 0% 50%; }
            100% { background-position: 200% 50%; }
        }
        .login-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            overflow: hidden;
            background-color: #050b14;
            background-image:
                linear-gradient(165deg, rgba(5, 11, 20, 0.9) 0%, rgba(15, 34, 68, 0.78) 40%, rgba(30, 58, 138, 0.52) 72%, rgba(5, 11, 20, 0.92) 100%),
                linear-gradient(125deg, rgba(37, 99, 235, 0.2) 0%, transparent 50%),
                url(/images/login-panel-bg.jpg);
            background-size: auto, auto, cover;
            background-position: center;
            background-repeat: no-repeat;
        }
        .login-bg::before {
            content: "";
            position: absolute;
            inset: 0;
            pointer-events: none;
            background-image:
                linear-gradient(rgba(56, 189, 248, 0.09) 1px, transparent 1px),
                linear-gradient(90deg, rgba(56, 189, 248, 0.09) 1px, transparent 1px),
                radial-gradient(ellipse 90% 55% at 50% -15%, rgba(139, 92, 246, 0.14), transparent),
                repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(56, 189, 248, 0.03) 2px, rgba(56, 189, 248, 0.03) 3px);
            background-size: 36px 36px, 36px 36px, 100% 100%, 100% 100%;
            opacity: 0.62;
        }
        .login-bg::after {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 50%;
            height: 100%;
            z-index: 4;
            pointer-events: none;
            background: linear-gradient(
                105deg,
                transparent 0%,
                rgba(255, 255, 255, 0) 32%,
                rgba(255, 255, 255, 0.2) 50%,
                rgba(56, 189, 248, 0.08) 58%,
                transparent 72%
            );
            animation: lt-panel-sweep 12s ease-in-out infinite;
        }
        .login-bg-orb {
            position: absolute;
            width: min(90vw, 520px);
            height: min(90vw, 520px);
            right: -12%;
            top: -18%;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(34, 211, 238, 0.32) 0%, rgba(139, 92, 246, 0.14) 45%, transparent 68%);
            pointer-events: none;
            animation: lt-glow-pulse 7s ease-in-out infinite;
            z-index: 1;
        }
        .login-bg-bloom {
            position: absolute;
            inset: 0;
            pointer-events: none;
            z-index: 1;
        }
        .login-bg-bloom span {
            position: absolute;
            border-radius: 50%;
            filter: blur(60px);
            animation: lt-panel-glow 7s ease-in-out infinite;
        }
        .login-bg-bloom .p1 {
            width: min(320px, 55vw);
            height: min(320px, 55vw);
            right: -5%;
            top: -8%;
            background: rgba(96, 165, 250, 0.28);
        }
        .login-bg-bloom .p2 {
            width: min(260px, 45vw);
            height: min(260px, 45vw);
            left: -6%;
            bottom: -5%;
            background: rgba(167, 139, 250, 0.22);
            animation-delay: -3.5s;
        }
        .login-hero-blobs {
            position: absolute;
            inset: 0;
            pointer-events: none;
            overflow: hidden;
            z-index: 2;
        }
        .login-hero-blobs .blob {
            position: absolute;
            border-radius: 50%;
            filter: blur(40px);
            opacity: 0.4;
        }
        .login-hero-blobs .blob-a {
            width: 200px;
            height: 200px;
            left: -5%;
            bottom: 10%;
            background: linear-gradient(135deg, #3b82f6, #8b5cf6);
            animation: lt-blob-drift 12s ease-in-out infinite;
        }
        .login-hero-blobs .blob-b {
            width: 160px;
            height: 160px;
            right: 8%;
            top: 35%;
            background: linear-gradient(135deg, #06b6d4, #2563eb);
            animation: lt-blob-drift 10s ease-in-out infinite reverse;
            animation-delay: -3s;
        }
        .login-hero-blobs .blob-c {
            width: 120px;
            height: 120px;
            left: 40%;
            top: -5%;
            background: linear-gradient(135deg, #a78bfa, #22d3ee);
            animation: lt-blob-drift 14s ease-in-out infinite;
            animation-delay: -6s;
        }
        .login-hero-deco {
            position: absolute;
            inset: 0;
            pointer-events: none;
            z-index: 2;
        }
        .login-hero-deco span {
            position: absolute;
            border: 1px solid rgba(147, 197, 253, 0.22);
            border-radius: 4px;
        }
        .login-hero-deco .d1 { width: 120px; height: 8px; left: 10%; bottom: 22%; opacity: .55; box-shadow: 0 0 20px rgba(56, 189, 248, 0.2); }
        .login-hero-deco .d2 { width: 8px; height: 64px; left: 15%; bottom: 12%; opacity: .45; box-shadow: 0 0 16px rgba(139, 92, 246, 0.15); }
        .login-hero-deco .d3 { width: 72px; height: 72px; right: 12%; top: 18%; border-radius: 50%; opacity: .4;
            border-color: rgba(34, 211, 238, 0.4);
            box-shadow: 0 0 24px rgba(34, 211, 238, 0.15), inset 0 0 20px rgba(255,255,255,0.05);
        }
        .login-hero-deco .d4 { width: 160px; height: 4px; right: 8%; bottom: 28%; opacity: .45;
            background: linear-gradient(90deg, transparent, rgba(56, 189, 248, 0.45), transparent);
            border: none;
        }
        .login-main {
            position: relative;
            z-index: 5;
            width: 100%;
            max-width: 440px;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 1.75rem;
        }
        .login-brand {
            text-align: center;
            width: 100%;
        }
        .login-brand-logo {
            display: block;
            width: min(92px, 24vw);
            height: auto;
            margin: 0 auto 1.1rem;
            object-fit: contain;
            filter: drop-shadow(0 0 18px rgba(56, 189, 248, 0.55)) drop-shadow(0 6px 20px rgba(0, 0, 0, 0.4));
        }
        .login-brand h1 {
            font-size: clamp(1.5rem, 4.5vw, 2rem);
            font-weight: 800;
            line-height: 1.3;
            margin: 0;
            letter-spacing: 0.02em;
            background: linear-gradient(110deg, #fff 0%, #e0f2fe 35%, #67e8f9 52%, #a5b4fc 72%, #fff 100%);
            background-size: 200% auto;
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            -webkit-text-fill-color: transparent;
            filter: drop-shadow(0 0 24px rgba(56, 189, 248, 0.45)) drop-shadow(0 2px 12px rgba(99, 102, 241, 0.35));
            animation: lt-shimmer 8s linear infinite;
        }
        .login-card-wrap {
            width: 100%;
            max-width: 400px;
            position: relative;
        }
        .login-card-wrap::before {
            content: "";
            position: absolute;
            left: 50%;
            top: 42%;
            width: 108%;
            height: 88%;
            transform: translate(-50%, -50%);
            z-index: 0;
            pointer-events: none;
            background: radial-gradient(ellipse 65% 55% at 50% 40%, rgba(34, 211, 238, 0.35) 0%, rgba(99, 102, 241, 0.2) 35%, transparent 70%);
            filter: blur(28px);
            animation: lt-card-halo 7s ease-in-out infinite;
        }
        .login-card {
            position: relative;
            z-index: 1;
            background: linear-gradient(155deg, rgba(15, 23, 42, 0.78) 0%, rgba(15, 23, 42, 0.88) 45%, rgba(30, 27, 75, 0.82) 100%);
            border: 1px solid rgba(56, 189, 248, 0.28);
            border-radius: 18px;
            box-shadow:
                0 0 0 1px rgba(14, 165, 233, 0.12) inset,
                0 0 40px rgba(56, 189, 248, 0.12),
                0 0 80px rgba(99, 102, 241, 0.08),
                0 28px 56px rgba(0, 0, 0, 0.55);
            overflow: hidden;
            backdrop-filter: blur(22px) saturate(1.35);
        }
        .login-card::after {
            content: "";
            position: absolute;
            inset: 0;
            border-radius: inherit;
            pointer-events: none;
            box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
        }
        .login-card-top {
            height: 4px;
            background: linear-gradient(90deg, #6366f1, #2563eb, #0ea5e9, #22d3ee, #a78bfa, #22d3ee, #6366f1);
            background-size: 200% 100%;
            animation: lt-border-flow 5s linear infinite;
        }
        .login-card .card-body {
            padding: 1.85rem 1.65rem 2.1rem;
        }
        .login-card-title {
            font-size: 1.25rem;
            font-weight: 800;
            margin-bottom: 0.35rem;
            text-align: center;
            letter-spacing: 0.08em;
            color: rgba(226, 232, 240, 0.96);
            text-shadow: 0 0 20px rgba(56, 189, 248, 0.35);
        }
        .login-card-title-line {
            width: 48px;
            height: 3px;
            margin: 0 auto 1.2rem;
            border-radius: 2px;
            background: linear-gradient(90deg, transparent, #22d3ee, #818cf8, transparent);
            box-shadow: 0 0 12px rgba(34, 211, 238, 0.5);
        }
        .login-card .form-label {
            font-size: 0.75rem;
            font-weight: 600;
            color: rgba(148, 163, 184, 0.95);
            margin-bottom: 0.4rem;
            letter-spacing: 0.06em;
        }
        .login-card .input-group {
            border-radius: 11px;
            overflow: hidden;
            border: 1px solid rgba(56, 189, 248, 0.22);
            background: rgba(2, 6, 23, 0.55);
            box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }
        .login-card .input-group:focus-within {
            border-color: rgba(34, 211, 238, 0.55);
            box-shadow:
                inset 0 1px 0 rgba(255, 255, 255, 0.07),
                0 0 0 2px rgba(34, 211, 238, 0.18),
                0 0 24px rgba(56, 189, 248, 0.2);
        }
        .login-card .input-group-text {
            border: none;
            background: rgba(15, 23, 42, 0.6);
            color: #22d3ee;
            padding-left: 0.9rem;
            padding-right: 0.9rem;
        }
        .login-card .input-group-text svg {
            display: block;
            opacity: 0.9;
            filter: drop-shadow(0 0 6px rgba(34, 211, 238, 0.4));
        }
        .login-card .login-pwd-toggle,
        .login-card .login-input-clear {
            border: none;
            background: transparent !important;
            color: #22d3ee;
            padding: 0 0.85rem;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: color 0.15s ease;
        }
        .login-card .login-pwd-toggle:hover,
        .login-card .login-input-clear:hover {
            background: transparent !important;
            color: #67e8f9;
        }
        .login-card .login-pwd-toggle:active,
        .login-card .login-pwd-toggle:focus,
        .login-card .login-input-clear:active,
        .login-card .login-input-clear:focus {
            outline: none;
            box-shadow: none;
            background: transparent !important;
        }
        .login-card .login-pwd-toggle:focus-visible,
        .login-card .login-input-clear:focus-visible {
            outline: 2px solid rgba(34, 211, 238, 0.55);
            outline-offset: -2px;
        }
        .login-card .login-pwd-toggle svg,
        .login-card .login-input-clear svg {
            display: block;
            opacity: 0.92;
            filter: drop-shadow(0 0 6px rgba(34, 211, 238, 0.35));
        }
        .login-card .form-control {
            border: none;
            background: transparent !important;
            color: #f1f5f9;
            font-size: 0.9375rem;
        }
        .login-card .form-control::placeholder {
            color: rgba(148, 163, 184, 0.65);
        }
        .login-card .form-control:focus {
            box-shadow: none;
            background: transparent !important;
            color: #fff;
        }
        .login-card .form-control:-webkit-autofill,
        .login-card .form-control:-webkit-autofill:hover,
        .login-card .form-control:-webkit-autofill:focus {
            -webkit-text-fill-color: #f1f5f9;
            box-shadow: 0 0 0 1000px rgba(15, 23, 42, 0.95) inset;
            transition: background-color 9999s ease-out;
        }
        .login-card .alert {
            border-radius: 8px;
            font-size: 0.8125rem;
            border-width: 1px;
            border-style: solid;
        }
        .login-card .login-alert-danger {
            background: rgba(127, 29, 29, 0.45);
            color: #fecaca;
            border-color: rgba(248, 113, 113, 0.45);
        }
        .login-card .login-login-error-below {
            margin-top: 0.15rem;
            background: transparent !important;
            border: none !important;
            box-shadow: none;
        }
        .login-card .login-login-error-icon {
            color: #f87171;
            line-height: 1.25;
            padding-top: 0.1rem;
        }
        .login-card .login-login-error-text {
            line-height: 1.35;
        }
        .login-card .login-captcha-row {
            align-items: center;
        }
        .login-card .login-captcha-input-wrap {
            flex: 1 1 6.5rem;
            min-width: 5.5rem;
            max-width: 10rem;
        }
        .login-card .login-captcha-input-wrap .login-captcha-input {
            border-radius: 0;
        }
        .login-card .login-captcha-img {
            display: block;
            border-radius: 8px;
            border: 1px solid rgba(56, 189, 248, 0.22);
            background: rgba(2, 6, 23, 0.55);
            vertical-align: middle;
        }
        .login-card .login-captcha-refresh {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 2.25rem;
            height: 2.25rem;
            min-width: 2.25rem;
            min-height: 2.25rem;
            padding: 0;
            border: none;
            border-radius: 0;
            background: transparent !important;
            color: #22d3ee;
            cursor: pointer;
            transition: color 0.15s ease;
        }
        .login-card .login-captcha-refresh svg {
            display: block;
            flex-shrink: 0;
        }
        .login-card .login-captcha-refresh:hover {
            color: #67e8f9;
        }
        .login-card .login-captcha-refresh:focus {
            outline: none;
            box-shadow: none;
        }
        .login-card .login-captcha-refresh:focus-visible {
            outline: 2px solid rgba(34, 211, 238, 0.55);
            outline-offset: 2px;
        }
        .login-card .login-alert-success {
            background: rgba(6, 78, 59, 0.45);
            color: #a7f3d0;
            border-color: rgba(52, 211, 153, 0.4);
        }
        .btn-login-primary {
            border: none;
            font-weight: 600;
            font-size: 0.9375rem;
            letter-spacing: 0.12em;
            padding-top: 0.75rem;
            padding-bottom: 0.75rem;
            border-radius: 8px;
            background: #2563eb;
            box-shadow: none;
            transition: background-color 0.2s ease, filter 0.2s ease;
        }
        .btn-login-primary:hover {
            background: #1d4ed8;
            filter: none;
            box-shadow: none;
        }
        .btn-login-primary:focus-visible {
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.4);
        }
        .btn-login-primary:active {
            background: #1e40af;
            transform: none;
        }
        .login-card .login-remember-row {
            margin-bottom: 0.65rem;
        }
        .login-card .login-remember-inner {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.5rem 1rem;
            padding: 0;
            margin: 0;
            border: none;
            background: none;
            box-shadow: none;
        }
        .login-card .login-remember-item {
            position: relative;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            margin: 0;
            cursor: pointer;
            user-select: none;
            font-size: 0.8125rem;
            font-weight: 500;
            letter-spacing: 0.02em;
            color: rgba(203, 213, 225, 0.92);
            transition: color 0.18s ease;
        }
        .login-card .login-remember-item:hover {
            color: #e2e8f0;
        }
        .login-card .login-remember-item:hover .login-remember-ui {
            border-color: rgba(34, 211, 238, 0.55);
            box-shadow: 0 0 12px rgba(34, 211, 238, 0.2);
        }
        .login-card .login-remember-input {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
            opacity: 0;
        }
        .login-card .login-remember-ui {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 1.125rem;
            height: 1.125rem;
            border-radius: 5px;
            border: 1px solid rgba(56, 189, 248, 0.38);
            background: rgba(15, 23, 42, 0.75);
            box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.35);
            transition: border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
        }
        .login-card .login-remember-tick {
            opacity: 0;
            transform: scale(0.6);
            color: #0f172a;
            transition: opacity 0.15s ease, transform 0.18s cubic-bezier(0.34, 1.56, 0.64, 1);
        }
        .login-card .login-remember-input:checked + .login-remember-ui {
            background: linear-gradient(145deg, #22d3ee 0%, #38bdf8 55%, #2563eb 130%);
            border-color: rgba(125, 211, 252, 0.85);
            box-shadow:
                0 0 14px rgba(34, 211, 238, 0.45),
                inset 0 1px 0 rgba(255, 255, 255, 0.35);
        }
        .login-card .login-remember-input:checked + .login-remember-ui .login-remember-tick {
            opacity: 1;
            transform: scale(1);
            color: #0f172a;
        }
        .login-card .login-remember-input:focus-visible + .login-remember-ui {
            outline: none;
            box-shadow:
                0 0 0 2px rgba(15, 23, 42, 0.95),
                0 0 0 4px rgba(34, 211, 238, 0.55);
        }
        .login-card .login-remember-text {
            line-height: 1.35;
        }
        @media (max-width: 575.98px) {
            .login-shell {
                padding: 1.25rem 1rem;
            }
            .login-main {
                gap: 1.35rem;
            }
        }