* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            height: 100vh;
            background: #0a0e17;
            display: flex;
            justify-content: center;
            align-items: center;
            overflow: hidden;
            position: relative;
        }

        /* 动态背景 */
        .background {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            overflow: hidden;
        }

        .particles {
            position: absolute;
            width: 100%;
            height: 100%;
        }

        .particle {
            position: absolute;
            background: rgba(185, 157, 79, 0.3);
            border-radius: 50%;
            animation: float 15s infinite linear;
        }

        @keyframes float {
            0% {
                transform: translateY(0) translateX(0);
            }
            25% {
                transform: translateY(-20px) translateX(10px);
            }
            50% {
                transform: translateY(0) translateX(20px);
            }
            75% {
                transform: translateY(20px) translateX(10px);
            }
            100% {
                transform: translateY(0) translateX(0);
            }
        }

        /* 登录容器 */
        .container {
            width: 90%;
            max-width: 450px;
            background: rgba(21, 30, 52, 0.85);
            backdrop-filter: blur(10px);
            border-radius: 20px;
            padding: 2.5rem;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
            border: 1px solid rgba(185, 157, 79, 0.2);
            position: relative;
            overflow: hidden;
        }

        .container::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: linear-gradient(45deg, transparent, rgba(185, 157, 79, 0.1), transparent);
            transform: rotate(45deg);
            animation: shine 6s linear infinite;
            z-index: -1;
        }

        @keyframes shine {
            0% {
                transform: rotate(45deg) translateX(-100%);
            }
            100% {
                transform: rotate(45deg) translateX(100%);
            }
        }

        /* Logo样式 */
        .logo {
            text-align: center;
            margin-bottom: 2rem;
            position: relative;
        }

        .logo img {
            width: 120px;
            height: 120px;
            border-radius: 50%;
            object-fit: cover;
            box-shadow: 0 0 25px rgba(247, 228, 166, 0.5);
            animation: glow 3s ease-in-out infinite alternate;
            position: relative;
            z-index: 1;
        }

        .logo::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 140px;
            height: 140px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(247, 228, 166, 0.3) 0%, rgba(247, 228, 166, 0) 70%);
            animation: pulse 3s ease-in-out infinite alternate;
        }

        @keyframes glow {
            0% {
                box-shadow: 0 0 15px rgba(247, 228, 166, 0.5);
            }
            100% {
                box-shadow: 0 0 30px rgba(247, 228, 166, 0.8), 0 0 40px rgba(247, 228, 166, 0.6);
            }
        }

        @keyframes pulse {
            0% {
                transform: translate(-50%, -50%) scale(0.9);
                opacity: 0.7;
            }
            100% {
                transform: translate(-50%, -50%) scale(1.1);
                opacity: 1;
            }
        }

        /* 表单样式 */
        .form {
            display: flex;
            flex-direction: column;
            gap: -1rem;
        }

        .input-group {
            position: relative;
            margin-bottom: 1.5rem;
        }

        .input-group input {
            width: 100%;
            padding: 1rem 1rem 1rem 3rem;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 10px;
            color: #fff;
            font-size: 1rem;
            transition: all 0.3s ease;
            outline: none;
        }

        .input-group input:focus {
            border-color: rgba(185, 157, 79, 0.8);
            box-shadow: 0 0 15px rgba(185, 157, 79, 0.3);
            background: rgba(255, 255, 255, 0.12);
        }

        .input-group input::placeholder {
            color: rgba(255, 255, 255, 0.6);
        }

        .input-group .icon {
            position: absolute;
            left: 1rem;
            top: 50%;
            transform: translateY(-50%);
            width: 20px;
            height: 20px;
            filter: invert(70%) sepia(30%) saturate(400%) hue-rotate(10deg);
            transition: all 0.3s ease;
        }

        .input-group input:focus + .icon {
            filter: invert(80%) sepia(40%) saturate(500%) hue-rotate(5deg);
        }

        /* 按钮样式 */
        .btn {
            padding: 1rem;
            border: none;
            border-radius: 10px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .login-btn {
            background: linear-gradient(135deg, #b99d4f, #f7e4a6);
            color: #333;
            margin-bottom: 1rem;
            box-shadow: 0 5px 15px rgba(185, 157, 79, 0.4);
        }

        .login-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(185, 157, 79, 0.6);
        }

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

        .login-btn::after {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: rgba(255, 255, 255, 0.1);
            transform: rotate(45deg);
            transition: all 0.5s ease;
            opacity: 0;
        }

        .login-btn:hover::after {
            animation: btn-shine 1.5s ease;
        }

        @keyframes btn-shine {
            0% {
                transform: rotate(45deg) translateX(-100%);
                opacity: 0;
            }
            50% {
                opacity: 1;
            }
            100% {
                transform: rotate(45deg) translateX(100%);
                opacity: 0;
            }
        }

        .register-btn {
            background: transparent;
            color: #f7e4a6;
            border: 1px solid rgba(185, 157, 79, 0.5);
        }

        .register-btn:hover {
            background: rgba(185, 157, 79, 0.1);
            border-color: rgba(185, 157, 79, 0.8);
            box-shadow: 0 0 15px rgba(185, 157, 79, 0.2);
        }

        /* 提示信息 */
        #tip {
            display: none;
            max-width: 80%;
            padding: 0.8em 1.2em;
            font-size: 14px;
            color: #fff;
            text-align: center;
            border-radius: 8px;
            line-height: 1.5em;
            background: rgba(0, 0, 0, 0.8);
            position: fixed;
            left: 50%;
            bottom: 50%;
            transform: translate(-50%, -50%);
            z-index: 999999;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
        }

        /* 响应式调整 */
        @media (max-width: 480px) {
            .container {
                padding: 1.5rem;
            }
            
            .logo img {
                width: 100px;
                height: 100px;
            }
            
            .logo::after {
                width: 120px;
                height: 120px;
            }
        }