* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Microsoft YaHei', 'PingFang SC', 'Segoe UI', sans-serif;
            background: linear-gradient(135deg, #fee2e2 0%, #fef2f2 50%, #fecaca 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
            position: relative;
            overflow: hidden;
        }

        /* body::before {
            content: '';
            position: absolute;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(220, 38, 38, 0.1), transparent);
            border-radius: 50%;
            top: -100px;
            right: -100px;
        } */

        body::after {
            content: '';
            position: absolute;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(220, 38, 38, 0.08), transparent);
            border-radius: 50%;
            bottom: -80px;
            left: -80px;
        }

        .container {
            width: 100%;
            max-width: 450px;
            position: relative;
            z-index: 1;
        }

        .header {
            text-align: center;
            margin-bottom: 2rem;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 70px;
            height: 70px;
            background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
            border-radius: 18px;
            margin-bottom: 1rem;
            box-shadow: 0 10px 30px rgba(220, 38, 38, 0.4);
            position: relative;
        }

        .logo::before {
            content: '';
            position: absolute;
            width: 80px;
            height: 80px;
            border: 2px solid rgba(220, 38, 38, 0.3);
            border-radius: 20px;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0%, 100% {
                transform: scale(1);
                opacity: 1;
            }
            50% {
                transform: scale(1.1);
                opacity: 0.5;
            }
        }

        .logo svg {
            width: 36px;
            height: 36px;
            fill: white;
        }

        .header h1 {
            font-size: 2.2rem;
            background: linear-gradient(135deg, #dc2626 0%, #991b1b 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 0.5rem;
            font-weight: 700;
        }

        .header .chinese {
            font-size: 1.5rem;
            color: #dc2626;
            margin-bottom: 0.3rem;
            font-weight: 600;
        }

        .header p {
            color: #7f1d1d;
            font-size: 0.95rem;
        }

        .login-card {
            background: white;
            border-radius: 24px;
            padding: 2.5rem;
            box-shadow: 0 20px 60px rgba(220, 38, 38, 0.15);
            border: 1px solid #fecaca;
            position: relative;
            overflow: hidden;
        }

        .login-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, #dc2626, #ef4444, #dc2626);
            background-size: 200% 100%;
            animation: gradient 3s linear infinite;
        }

        @keyframes gradient {
            0% {
                background-position: 0% 0%;
            }
            100% {
                background-position: 200% 0%;
            }
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-group label {
            display: block;
            font-size: 0.9rem;
            font-weight: 600;
            color: #7f1d1d;
            margin-bottom: 0.5rem;
        }

        .input-wrapper {
            position: relative;
        }

        .input-icon {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: #dc2626;
            width: 20px;
            height: 20px;
        }

        .form-control {
            width: 100%;
            padding: 14px 14px 14px 46px;
            border: 2px solid #fecaca;
            border-radius: 12px;
            font-size: 0.95rem;
            transition: all 0.3s ease;
            outline: none;
            background: #fef2f2;
        }

        .form-control:focus {
            border-color: #dc2626;
            background: white;
            box-shadow: 0 0 0 4px rgba(220, 38, 38, 0.1);
        }

        .form-control::placeholder {
            color: #fca5a5;
        }

        .password-toggle {
            position: absolute;
            right: 14px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: #dc2626;
            cursor: pointer;
            padding: 5px;
            display: flex;
            align-items: center;
            transition: all 0.3s ease;
        }

        .password-toggle:hover {
            color: #991b1b;
            transform: translateY(-50%) scale(1.1);
        }

        .form-options {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 1.8rem;
        }

        .checkbox-wrapper {
            display: flex;
            align-items: center;
        }

        .checkbox-wrapper input[type="checkbox"] {
            width: 18px;
            height: 18px;
            margin-right: 8px;
            cursor: pointer;
            accent-color: #dc2626;
        }

        .checkbox-wrapper label {
            font-size: 0.875rem;
            color: #7f1d1d;
            cursor: pointer;
        }

        .forgot-password {
            font-size: 0.875rem;
            color: #dc2626;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .forgot-password:hover {
            color: #991b1b;
            text-decoration: underline;
        }

        .btn-login {
            width: 100%;
            padding: 15px;
            background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
            color: white;
            border: none;
            border-radius: 12px;
            font-size: 1.05rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 6px 20px rgba(220, 38, 38, 0.4);
            position: relative;
            overflow: hidden;
        }

        .btn-login::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
            transition: left 0.5s;
        }

        .btn-login:hover::before {
            left: 100%;
        }

        .btn-login:hover {
            background: linear-gradient(135deg, #b91c1c 0%, #991b1b 100%);
            box-shadow: 0 8px 25px rgba(220, 38, 38, 0.5);
            transform: translateY(-2px);
        }

        .btn-login:active {
            transform: translateY(0);
        }

        .divider {
            position: relative;
            text-align: center;
            margin: 1.8rem 0;
        }

        .divider::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            width: 100%;
            height: 1px;
            background: linear-gradient(90deg, transparent, #fecaca, transparent);
        }

        .divider span {
            position: relative;
            background: white;
            padding: 0 1rem;
            color: #dc2626;
            font-size: 0.875rem;
            font-weight: 500;
        }

        .register-link {
            text-align: center;
            font-size: 0.9rem;
            color: #7f1d1d;
        }

        .register-link a {
            color: #dc2626;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .register-link a:hover {
            color: #991b1b;
            text-decoration: underline;
        }

        .footer {
            text-align: center;
            margin-top: 2rem;
        }

        .footer p {
            font-size: 0.875rem;
            color: #991b1b;
            margin-bottom: 0.75rem;
            font-weight: 500;
        }

        .footer-links {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 1rem;
            font-size: 0.75rem;
            color: #fca5a5;
        }

        .footer-links a {
            color: #dc2626;
            text-decoration: none;
            transition: all 0.3s ease;
        }

        .footer-links a:hover {
            color: #991b1b;
            text-decoration: underline;
        }

        .decorative-element {
            position: absolute;
            width: 60px;
            height: 60px;
            border: 2px solid #fecaca;
            border-radius: 50%;
            opacity: 0.3;
        }

        .decorative-element:nth-child(1) {
            top: 10%;
            left: 5%;
        }

        .decorative-element:nth-child(2) {
            bottom: 15%;
            right: 8%;
        }

        @media (max-width: 480px) {
            .login-card {
                padding: 2rem 1.5rem;
            }

            .header h1 {
                font-size: 1.9rem;
            }

            .header .chinese {
                font-size: 1.3rem;
            }
        }