* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            -webkit-tap-highlight-color: transparent;
        }

        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            min-height: 100vh;
            background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('https://images.unsplash.com/photo-1500937386664-56d1dfef3854?ixlib=rb-4.0.3&auto=format&fit=crop&w=2000&q=80');
            background-size: cover;
            background-position: center;
            display: flex;
            justify-content: center;
            align-items: center;
            color: #ecf0f1;
            touch-action: manipulation;
            overflow: hidden;
            position: relative;
        }

        /* 粒子背景效果 */
        #particles-js {
            position: absolute;
            width: 100%;
            height: 100%;
            top: 0;
            left: 0;
            z-index: 0;
        }

        .login-container {
            background: rgba(255,255,255,0.1);
            backdrop-filter: blur(12px);
            width: 90%;
            max-width: 450px;
            padding: 40px 30px;
            border-radius: 15px;
            box-shadow: 0 8px 32px rgba(0,0,0,0.3);
            border: 1px solid rgba(255,255,255,0.1);
            position: relative;
            z-index: 10;
            transform: translateY(0);
            opacity: 1;
            transition: all 0.5s ease;
            animation: fadeInUp 0.8s ease-out;
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .logo-container {
            text-align: center;
            margin-bottom: 30px;
            transform: scale(1);
            transition: transform 0.3s ease;
        }

        .logo-container:hover {
            transform: scale(1.03);
        }

        .logo-image {
            width: 120px;
            height: 120px;
            border-radius: 50%;
            background: linear-gradient(135deg, #3498db, #2980b9);
            margin: 0 auto 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 25px rgba(52, 152, 219, 0.5);
            border: 3px solid rgba(255, 255, 255, 0.2);
            animation: pulse 2s infinite;
        }

        .logo-image i {
            font-size: 60px;
            color: white;
        }

        @keyframes pulse {
            0% { box-shadow: 0 0 25px rgba(52, 152, 219, 0.5); }
            50% { box-shadow: 0 0 35px rgba(52, 152, 219, 0.8); }
            100% { box-shadow: 0 0 25px rgba(52, 152, 219, 0.5); }
        }

        .logo-text {
            font-size: 32px;
            font-weight: 700;
            background: linear-gradient(90deg, #00e5ff, #00ff95);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: 2px;
            margin-bottom: 5px;
        }

        .logo-subtext {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 5px;
        }

        .login-form {
            display: flex;
            flex-direction: column;
            gap: 25px;
        }

        .input-group {
            position: relative;
        }

        .input-group i {
            position: absolute;
            left: 18px;
            top: 50%;
            transform: translateY(-50%);
            color: rgba(255, 255, 255, 0.7);
            font-size: 18px;
            transition: color 0.3s;
        }

        .input-group:hover i {
            color: #00ff95;
        }

        .input-group input {
            width: 100%;
            padding: 14px 20px 14px 50px;
            border: none;
            border-radius: 30px;
            background: rgba(255,255,255,0.1);
            color: #ecf0f1;
            font-size: 1rem;
            transition: all 0.3s ease;
            border: 1px solid transparent;
        }

        .input-group input:focus {
            outline: none;
            box-shadow: 0 0 0 2px rgba(0, 229, 255, 0.5);
            background: rgba(255,255,255,0.15);
            border-color: #00e5ff;
        }

        .input-group input:hover {
            background: rgba(255,255,255,0.12);
        }

        .input-group input::placeholder {
            color: rgba(236, 240, 241, 0.7);
        }

        .remember-forgot {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.95rem;
            padding: 0 10px;
        }

        .remember {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .remember input {
            accent-color: #3498db;
        }

        .remember label {
            cursor: pointer;
            transition: color 0.3s;
            color: rgba(236, 240, 241, 0.8);
        }

        .remember:hover label {
            color: #00ff95;
        }

        .forgot a {
            color: #3498db;
            text-decoration: none;
            transition: all 0.3s;
        }

        .forgot a:hover {
            color: #00ff95;
            text-decoration: underline;
        }

        button[type="submit"] {
            padding: 14px;
            border: none;
            border-radius: 30px;
            background: linear-gradient(135deg, #3498db, #2980b9);
            color: white;
            font-size: 1.1rem;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            letter-spacing: 1px;
            margin-top: 10px;
            position: relative;
            overflow: hidden;
            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
        }

        button[type="submit"]:hover {
            transform: translateY(-3px);
            box-shadow: 0 7px 20px rgba(0,0,0,0.3);
            background: linear-gradient(135deg, #2980b9, #3498db);
        }

        button[type="submit"]:active {
            transform: translateY(1px);
        }

        button[type="submit"]::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
            transition: 0.5s;
            z-index: 1;
        }

        button[type="submit"]:hover::before {
            left: 100%;
        }

        .register-link {
            text-align: center;
            margin-top: 25px;
            font-size: 0.95rem;
            color: rgba(236, 240, 241, 0.8);
        }

        .register-link a {
            color: #00ff95;
            text-decoration: none;
            transition: all 0.3s;
            font-weight: 600;
            position: relative;
            padding: 0 2px;
        }

        .register-link a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: #00ff95;
            transition: width 0.3s ease;
        }

        .register-link a:hover::after {
            width: 100%;
        }

        .register-link a:hover {
            color: #00e5ff;
        }

        /* 页脚样式 - 移动到背景层底部 */
        .background-footer {
            position: absolute;
            bottom: 20px;
            width: 100%;
            text-align: center;
            font-size: 0.8rem;
            color: rgba(236, 240, 241, 0.8);
            z-index: 5;
        }

        .beian-container {
            padding: 10px 15px;
            background: rgba(0,10,20,0.7);
            border-radius: 8px;
            display: inline-block;
            backdrop-filter: blur(5px);
            border: 1px solid rgba(255,255,255,0.1);
            transition: all 0.3s ease;
        }

        .beian-container:hover {
            background: rgba(0,20,40,0.8);
            transform: translateY(-3px);
        }

        .beian-container a {
            color: rgba(236, 240, 241, 0.8);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            margin: 0 10px;
            transition: color 0.3s;
        }

        .beian-container a:hover {
            color: #00ff95;
        }

        .beian-container img {
            margin-right: 5px;
        }

        .beian-container span {
            color: rgba(236, 240, 241, 0.6);
        }

        /* 错误提示 */
        .error-message {
            background: rgba(231, 76, 60, 0.2);
            border-left: 4px solid #e74c3c;
            padding: 12px 15px;
            margin-bottom: 20px;
            border-radius: 4px;
            animation: fadeIn 0.3s ease-in-out;
            display: flex;
            align-items: center;
            gap: 10px;
            backdrop-filter: blur(2px);
        }
        
        .error-message i {
            font-size: 20px;
            animation: pulse 1.5s infinite;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(-10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* 输入验证提示 */
        .validation-message {
            color: #ff6b6b;
            font-size: 0.85rem;
            margin-top: 5px;
            padding-left: 15px;
            display: none;
        }

        /* 移动端优化 */
        @media (max-width: 480px) {
            .login-container {
                padding: 30px 20px;
                border-radius: 12px;
            }

            .logo-image {
                width: 100px;
                height: 100px;
            }

            .logo-image i {
                font-size: 50px;
            }

            .logo-text {
                font-size: 26px;
            }

            .logo-subtext {
                font-size: 14px;
            }

            .input-group input {
                padding: 12px 18px 12px 45px;
                font-size: 0.95rem;
            }

            button[type="submit"] {
                padding: 12px;
                font-size: 1rem;
            }
            
            .background-footer {
                bottom: 10px;
                font-size: 0.7rem;
                padding: 0 15px;
            }
            
            .beian-container {
                display: flex;
                flex-direction: column;
                gap: 5px;
            }
        }