/* 登录页面样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.login-container {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
}

.background-shapes {
    position: relative;
    width: 100%;
    height: 100%;
}

.shape {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    animation: float 6s ease-in-out infinite;
}

.shape-1 {
    width: 200px;
    height: 200px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 150px;
    height: 150px;
    top: 60%;
    right: 15%;
    animation-delay: 2s;
}

.shape-3 {
    width: 100px;
    height: 100px;
    top: 30%;
    right: 30%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(180deg);
    }
}

.login-content {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 400px;
}

.login-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: slideUp 0.8s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 20px;
}

.logo i {
    color: #3498db;
    font-size: 1.8rem;
}

.login-header h2 {
    color: #2c3e50;
    font-size: 1.8rem;
    margin-bottom: 8px;
    font-weight: 600;
}

.login-header p {
    color: #7f8c8d;
    font-size: 0.95rem;
}

.login-form {
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-wrapper i {
    position: absolute;
    left: 15px;
    color: #7f8c8d;
    font-size: 1rem;
    z-index: 2;
}

.input-wrapper input {
    width: 100%;
    padding: 15px 15px 15px 45px;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    font-size: 1rem;
    background: #fff;
    transition: all 0.3s ease;
    outline: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
    user-select: text;
}

.input-wrapper input:focus {
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.password-toggle {
    position: absolute;
    right: 15px;
    background: none;
    border: none;
    color: #7f8c8d;
    cursor: pointer;
    font-size: 1rem;
    padding: 5px;
    transition: color 0.3s ease;
}

.password-toggle:hover {
    color: #3498db;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.remember-me {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 0.9rem;
    color: #7f8c8d;
}

.remember-me input {
    display: none;
}

.checkmark {
    width: 18px;
    height: 18px;
    border: 2px solid #e9ecef;
    border-radius: 4px;
    margin-right: 8px;
    position: relative;
    transition: all 0.3s ease;
}

.remember-me input:checked + .checkmark {
    background: #3498db;
    border-color: #3498db;
}

.remember-me input:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 12px;
    font-weight: bold;
}

.forgot-password {
    color: #3498db;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.forgot-password:hover {
    color: #2980b9;
    text-decoration: underline;
}

.login-btn {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    margin-bottom: 20px;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.3);
}

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

.login-btn.loading {
    pointer-events: none;
}

.btn-text {
    transition: opacity 0.3s ease;
}

.btn-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 1.2rem;
}

.login-divider {
    text-align: center;
    margin: 20px 0;
    position: relative;
}

.login-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: #e9ecef;
}

.login-divider span {
    background: rgba(255, 255, 255, 0.95);
    padding: 0 15px;
    color: #7f8c8d;
    font-size: 0.9rem;
}

.register-link {
    text-align: center;
}

.register-link p {
    color: #7f8c8d;
    font-size: 0.95rem;
}

.register-btn {
    color: #3498db;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.register-btn:hover {
    color: #2980b9;
    text-decoration: underline;
}

.back-to-home {
    text-align: center;
    margin-top: 20px;
}

.back-to-home a {
    color: #7f8c8d;
    text-decoration: none;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: color 0.3s ease;
}

.back-to-home a:hover {
    color: #3498db;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .login-container {
        padding: 15px;
    }
    
    .login-card {
        padding: 30px 25px;
        margin: 10px;
        border-radius: 15px;
    }
    
    .login-header h2 {
        font-size: 1.6rem;
    }
    
    .logo {
        font-size: 1.3rem;
    }
    
    .logo i {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .login-container {
        padding: 10px;
    }
    
    .login-card {
        padding: 25px 20px;
        margin: 5px;
        border-radius: 12px;
    }
    
    .login-header h2 {
        font-size: 1.4rem;
    }
    
    .login-header p {
        font-size: 0.9rem;
    }
    
    .input-wrapper input {
        padding: 12px 12px 12px 40px;
        font-size: 16px; /* 防止iOS缩放 */
    }
    
    .login-btn {
        padding: 12px;
        font-size: 1rem;
    }
    
    .form-options {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .remember-me {
        font-size: 0.85rem;
    }
    
    .forgot-password {
        font-size: 0.85rem;
    }
}

@media (max-width: 360px) {
    .login-card {
        padding: 20px 15px;
    }
    
    .login-header h2 {
        font-size: 1.3rem;
    }
    
    .input-wrapper input {
        padding: 10px 10px 10px 35px;
    }
    
    .input-wrapper i {
        left: 12px;
        font-size: 0.9rem;
    }
}

/* 错误提示样式 */
.error-message {
    background: #e74c3c;
    color: white;
    padding: 12px 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
    animation: slideDown 0.3s ease-out;
}

.success-message {
    background: #27ae60;
    color: white;
    padding: 12px 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
    animation: slideDown 0.3s ease-out;
}

.warning-message {
    background: #f39c12;
    color: white;
    padding: 12px 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
    animation: slideDown 0.3s ease-out;
}


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