diff --git a/login-modal/index.html b/login-modal/index.html
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+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Login Modal Demo</title>
+    <style>
+        * {
+            margin: 0;
+            padding: 0;
+            box-sizing: border-box;
+        }
+
+        body {
+            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
+            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+            min-height: 100vh;
+            display: flex;
+            justify-content: center;
+            align-items: center;
+        }
+
+        .demo-container {
+            text-align: center;
+        }
+
+        .open-modal-btn {
+            padding: 16px 32px;
+            font-size: 18px;
+            font-weight: 600;
+            color: #667eea;
+            background: white;
+            border: none;
+            border-radius: 8px;
+            cursor: pointer;
+            transition: all 0.3s ease;
+            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
+        }
+
+        .open-modal-btn:hover {
+            transform: translateY(-2px);
+            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
+        }
+
+        .modal-overlay {
+            position: fixed;
+            top: 0;
+            left: 0;
+            width: 100%;
+            height: 100%;
+            background: rgba(0, 0, 0, 0.5);
+            backdrop-filter: blur(4px);
+            display: flex;
+            justify-content: center;
+            align-items: center;
+            opacity: 0;
+            visibility: hidden;
+            transition: all 0.3s ease;
+            z-index: 1000;
+        }
+
+        .modal-overlay.active {
+            opacity: 1;
+            visibility: visible;
+        }
+
+        .modal {
+            background: white;
+            border-radius: 16px;
+            padding: 40px;
+            width: 100%;
+            max-width: 400px;
+            margin: 20px;
+            transform: translateY(-20px) scale(0.95);
+            transition: all 0.3s ease;
+            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
+        }
+
+        .modal-overlay.active .modal {
+            transform: translateY(0) scale(1);
+        }
+
+        .modal-header {
+            text-align: center;
+            margin-bottom: 32px;
+        }
+
+        .modal-header h2 {
+            font-size: 28px;
+            color: #333;
+            margin-bottom: 8px;
+        }
+
+        .modal-header p {
+            color: #666;
+            font-size: 14px;
+        }
+
+        .close-btn {
+            position: absolute;
+            top: 16px;
+            right: 16px;
+            width: 32px;
+            height: 32px;
+            border: none;
+            background: #f5f5f5;
+            border-radius: 50%;
+            cursor: pointer;
+            display: flex;
+            justify-content: center;
+            align-items: center;
+            transition: all 0.2s ease;
+            font-size: 18px;
+            color: #666;
+        }
+
+        .close-btn:hover {
+            background: #e0e0e0;
+            color: #333;
+        }
+
+        .modal-content {
+            position: relative;
+        }
+
+        .form-group {
+            margin-bottom: 20px;
+        }
+
+        .form-group label {
+            display: block;
+            margin-bottom: 8px;
+            font-weight: 500;
+            color: #333;
+            font-size: 14px;
+        }
+
+        .form-group input {
+            width: 100%;
+            padding: 14px 16px;
+            border: 2px solid #e0e0e0;
+            border-radius: 8px;
+            font-size: 16px;
+            transition: all 0.2s ease;
+            outline: none;
+        }
+
+        .form-group input:focus {
+            border-color: #667eea;
+            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
+        }
+
+        .form-group input::placeholder {
+            color: #aaa;
+        }
+
+        .form-options {
+            display: flex;
+            justify-content: space-between;
+            align-items: center;
+            margin-bottom: 24px;
+            font-size: 14px;
+        }
+
+        .remember-me {
+            display: flex;
+            align-items: center;
+            gap: 8px;
+            cursor: pointer;
+        }
+
+        .remember-me input[type="checkbox"] {
+            width: 18px;
+            height: 18px;
+            accent-color: #667eea;
+            cursor: pointer;
+        }
+
+        .remember-me span {
+            color: #666;
+        }
+
+        .forgot-password {
+            color: #667eea;
+            text-decoration: none;
+            font-weight: 500;
+            transition: color 0.2s ease;
+        }
+
+        .forgot-password:hover {
+            color: #764ba2;
+        }
+
+        .login-btn {
+            width: 100%;
+            padding: 14px;
+            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+            color: white;
+            border: none;
+            border-radius: 8px;
+            font-size: 16px;
+            font-weight: 600;
+            cursor: pointer;
+            transition: all 0.3s ease;
+        }
+
+        .login-btn:hover {
+            transform: translateY(-1px);
+            box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
+        }
+
+        .login-btn:active {
+            transform: translateY(0);
+        }
+
+        .login-btn:disabled {
+            opacity: 0.7;
+            cursor: not-allowed;
+            transform: none;
+        }
+
+        .divider {
+            display: flex;
+            align-items: center;
+            margin: 24px 0;
+            color: #999;
+            font-size: 14px;
+        }
+
+        .divider::before,
+        .divider::after {
+            content: '';
+            flex: 1;
+            height: 1px;
+            background: #e0e0e0;
+        }
+
+        .divider span {
+            padding: 0 16px;
+        }
+
+        .social-login {
+            display: flex;
+            gap: 12px;
+        }
+
+        .social-btn {
+            flex: 1;
+            padding: 12px;
+            border: 2px solid #e0e0e0;
+            border-radius: 8px;
+            background: white;
+            cursor: pointer;
+            transition: all 0.2s ease;
+            display: flex;
+            justify-content: center;
+            align-items: center;
+        }
+
+        .social-btn:hover {
+            border-color: #667eea;
+            background: #f8f9ff;
+        }
+
+        .social-btn svg {
+            width: 24px;
+            height: 24px;
+        }
+
+        .signup-link {
+            text-align: center;
+            margin-top: 24px;
+            font-size: 14px;
+            color: #666;
+        }
+
+        .signup-link a {
+            color: #667eea;
+            text-decoration: none;
+            font-weight: 600;
+        }
+
+        .signup-link a:hover {
+            text-decoration: underline;
+        }
+
+        .error-message {
+            background: #fff5f5;
+            border: 1px solid #fed7d7;
+            color: #c53030;
+            padding: 12px 16px;
+            border-radius: 8px;
+            margin-bottom: 20px;
+            font-size: 14px;
+            display: none;
+        }
+
+        .error-message.show {
+            display: block;
+        }
+
+        .success-message {
+            background: #f0fff4;
+            border: 1px solid #9ae6b4;
+            color: #276749;
+            padding: 12px 16px;
+            border-radius: 8px;
+            margin-bottom: 20px;
+            font-size: 14px;
+            display: none;
+        }
+
+        .success-message.show {
+            display: block;
+        }
+
+        .loading-spinner {
+            display: inline-block;
+            width: 20px;
+            height: 20px;
+            border: 2px solid rgba(255, 255, 255, 0.3);
+            border-radius: 50%;
+            border-top-color: white;
+            animation: spin 0.8s linear infinite;
+            margin-right: 8px;
+        }
+
+        @keyframes spin {
+            to {
+                transform: rotate(360deg);
+            }
+        }
+
+        @media (max-width: 480px) {
+            .modal {
+                padding: 24px;
+                margin: 16px;
+            }
+
+            .modal-header h2 {
+                font-size: 24px;
+            }
+
+            .form-options {
+                flex-direction: column;
+                gap: 12px;
+                align-items: flex-start;
+            }
+        }
+    </style>
+</head>
+<body>
+    <div class="demo-container">
+        <button class="open-modal-btn" onclick="openModal()">Open Login Modal</button>
+    </div>
+
+    <div class="modal-overlay" id="modalOverlay" onclick="handleOverlayClick(event)">
+        <div class="modal">
+            <div class="modal-content">
+                <button class="close-btn" onclick="closeModal()">&times;</button>
+                
+                <div class="modal-header">
+                    <h2>Welcome Back</h2>
+                    <p>Please sign in to your account</p>
+                </div>
+
+                <div class="error-message" id="errorMessage"></div>
+                <div class="success-message" id="successMessage"></div>
+
+                <form id="loginForm" onsubmit="handleLogin(event)">
+                    <div class="form-group">
+                        <label for="email">Email</label>
+                        <input 
+                            type="email" 
+                            id="email" 
+                            name="email" 
+                            placeholder="Enter your email"
+                            required
+                            autocomplete="email"
+                        >
+                    </div>
+
+                    <div class="form-group">
+                        <label for="password">Password</label>
+                        <input 
+                            type="password" 
+                            id="password" 
+                            name="password" 
+                            placeholder="Enter your password"
+                            required
+                            autocomplete="current-password"
+                        >
+                    </div>
+
+                    <div class="form-options">
+                        <label class="remember-me">
+                            <input type="checkbox" id="rememberMe" name="rememberMe">
+                            <span>Remember me</span>
+                        </label>
+                        <a href="#" class="forgot-password" onclick="handleForgotPassword(event)">Forgot password?</a>
+                    </div>
+
+                    <button type="submit" class="login-btn" id="loginBtn">
+                        Sign In
+                    </button>
+                </form>
+
+                <div class="divider">
+                    <span>or continue with</span>
+                </div>
+
+                <div class="social-login">
+                    <button class="social-btn" onclick="handleSocialLogin('google')" title="Sign in with Google">
+                        <svg viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+                            <path d="M22.56 12.25c0-.78-.07-1.53-.2-2.25H12v4.26h5.92c-.26 1.37-1.04 2.53-2.21 3.31v2.77h3.57c2.08-1.92 3.28-4.74 3.28-8.09z" fill="#4285F4"/>
+                            <path d="M12 23c2.97 0 5.46-.98 7.28-2.66l-3.57-2.77c-.98.66-2.23 1.06-3.71 1.06-2.86 0-5.29-1.93-6.16-4.53H2.18v2.84C3.99 20.53 7.7 23 12 23z" fill="#34A853"/>
+                            <path d="M5.84 14.09c-.22-.66-.35-1.36-.35-2.09s.13-1.43.35-2.09V7.07H2.18C1.43 8.55 1 10.22 1 12s.43 3.45 1.18 4.93l2.85-2.22.81-.62z" fill="#FBBC05"/>
+                            <path d="M12 5.38c1.62 0 3.06.56 4.21 1.64l3.15-3.15C17.45 2.09 14.97 1 12 1 7.7 1 3.99 3.47 2.18 7.07l3.66 2.84c.87-2.6 3.3-4.53 6.16-4.53z" fill="#EA4335"/>
+                        </svg>
+                    </button>
+                    <button class="social-btn" onclick="handleSocialLogin('github')" title="Sign in with GitHub">
+                        <svg viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+                            <path d="M12 2C6.477 2 2 6.477 2 12c0 4.42 2.865 8.17 6.839 9.49.5.092.682-.217.682-.482 0-.237-.008-.866-.013-1.7-2.782.604-3.369-1.34-3.369-1.34-.454-1.156-1.11-1.464-1.11-1.464-.908-.62.069-.608.069-.608 1.003.07 1.531 1.03 1.531 1.03.892 1.529 2.341 1.087 2.91.831.092-.646.35-1.086.636-1.336-2.22-.253-4.555-1.11-4.555-4.943 0-1.091.39-1.984 1.029-2.683-.103-.253-.446-1.27.098-2.647 0 0 .84-.269 2.75 1.025A9.578 9.578 0 0112 6.836c.85.004 1.705.114 2.504.336 1.909-1.294 2.747-1.025 2.747-1.025.546 1.377.203 2.394.1 2.647.64.699 1.028 1.592 1.028 2.683 0 3.842-2.339 4.687-4.566 4.935.359.309.678.919.678 1.852 0 1.336-.012 2.415-.012 2.743 0 .267.18.578.688.48C19.138 20.167 22 16.418 22 12c0-5.523-4.477-10-10-10z" fill="#333"/>
+                        </svg>
+                    </button>
+                    <button class="social-btn" onclick="handleSocialLogin('twitter')" title="Sign in with X">
+                        <svg viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+                            <path d="M18.244 2.25h3.308l-7.227 8.26 8.502 11.24H16.17l-5.214-6.817L4.99 21.75H1.68l7.73-8.835L1.254 2.25H8.08l4.713 6.231zm-1.161 17.52h1.833L7.084 4.126H5.117z" fill="#000"/>
+                        </svg>
+                    </button>
+                </div>
+
+                <div class="signup-link">
+                    Don't have an account? <a href="#" onclick="handleSignup(event)">Sign up</a>
+                </div>
+            </div>
+        </div>
+    </div>
+
+    <script>
+        const modalOverlay = document.getElementById('modalOverlay');
+        const loginForm = document.getElementById('loginForm');
+        const loginBtn = document.getElementById('loginBtn');
+        const errorMessage = document.getElementById('errorMessage');
+        const successMessage = document.getElementById('successMessage');
+
+        function openModal() {
+            modalOverlay.classList.add('active');
+            document.body.style.overflow = 'hidden';
+            document.getElementById('email').focus();
+        }
+
+        function closeModal() {
+            modalOverlay.classList.remove('active');
+            document.body.style.overflow = '';
+            resetForm();
+        }
+
+        function handleOverlayClick(event) {
+            if (event.target === modalOverlay) {
+                closeModal();
+            }
+        }
+
+        function resetForm() {
+            loginForm.reset();
+            hideError();
+            hideSuccess();
+            loginBtn.disabled = false;
+            loginBtn.innerHTML = 'Sign In';
+        }
+
+        function showError(message) {
+            errorMessage.textContent = message;
+            errorMessage.classList.add('show');
+            hideSuccess();
+        }
+
+        function hideError() {
+            errorMessage.classList.remove('show');
+        }
+
+        function showSuccess(message) {
+            successMessage.textContent = message;
+            successMessage.classList.add('show');
+            hideError();
+        }
+
+        function hideSuccess() {
+            successMessage.classList.remove('show');
+        }
+
+        function setLoading(isLoading) {
+            loginBtn.disabled = isLoading;
+            if (isLoading) {
+                loginBtn.innerHTML = '<span class="loading-spinner"></span>Signing in...';
+            } else {
+                loginBtn.innerHTML = 'Sign In';
+            }
+        }
+
+        async function handleLogin(event) {
+            event.preventDefault();
+            
+            const email = document.getElementById('email').value.trim();
+            const password = document.getElementById('password').value;
+            const rememberMe = document.getElementById('rememberMe').checked;
+
+            if (!email || !password) {
+                showError('Please fill in all fields');
+                return;
+            }
+
+            if (!isValidEmail(email)) {
+                showError('Please enter a valid email address');
+                return;
+            }
+
+            if (password.length < 6) {
+                showError('Password must be at least 6 characters');
+                return;
+            }
+
+            setLoading(true);
+
+            try {
+                await simulateLogin(email, password, rememberMe);
+                showSuccess('Login successful! Redirecting...');
+                
+                setTimeout(() => {
+                    closeModal();
+                    alert('Login successful!\n\nEmail: ' + email + '\nRemember me: ' + rememberMe);
+                }, 1500);
+            } catch (error) {
+                showError(error.message);
+            } finally {
+                setLoading(false);
+            }
+        }
+
+        function isValidEmail(email) {
+            const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+            return emailRegex.test(email);
+        }
+
+        function simulateLogin(email, password, rememberMe) {
+            return new Promise((resolve, reject) => {
+                setTimeout(() => {
+                    if (email === 'test@example.com' && password === 'password123') {
+                        resolve({ success: true });
+                    } else if (email === 'error@example.com') {
+                        reject(new Error('Account has been locked. Please contact support.'));
+                    } else {
+                        resolve({ success: true });
+                    }
+                }, 1500);
+            });
+        }
+
+        function handleForgotPassword(event) {
+            event.preventDefault();
+            alert('Forgot password functionality would be implemented here.');
+        }
+
+        function handleSocialLogin(provider) {
+            alert('Social login with ' + provider + ' would be implemented here.');
+        }
+
+        function handleSignup(event) {
+            event.preventDefault();
+            alert('Sign up functionality would be implemented here.');
+        }
+
+        document.addEventListener('keydown', function(event) {
+            if (event.key === 'Escape' && modalOverlay.classList.contains('active')) {
+                closeModal();
+            }
+        });
+    </script>
+</body>
+</html>
