:root {
    --main-color: #5D3FD3;
    --light-purple: #f0edff;
    --dark-purple: #4a2fb8;
    --gradient-primary: linear-gradient(135deg, #5D3FD3 0%, #8D71FF 100%);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #f8f9fa;
    color: #333;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 顶部导航栏 - 复用首页样式 */
.top-nav {
    background: var(--gradient-primary);
    box-shadow: 0 4px 15px rgba(93, 63, 211, 0.2);
}

.main-nav {
    padding: 15px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
}

.logo {
    color: white;
    font-size: 28px;
    font-weight: bold;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo i {
    font-size: 32px;
}

.nav-links {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-size: 16px;
    transition: opacity 0.3s ease;
    display: flex;
    align-items: center;
    gap: 5px;
}

.nav-link:hover {
    opacity: 0.8;
    color: white;
}

.nav-link.active {
    background: rgba(255, 255, 255, 0.2);
    padding: 8px 16px;
    border-radius: 20px;
}

/* 主要内容区域 */
.main-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
}

.login-container {
    width: 100%;
    max-width: 450px;
    background: white;
    border-radius: 20px;
    padding: 50px 40px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.login-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.login-header {
    text-align: center;
    margin-bottom: 40px;
}

.login-title {
    font-size: 28px;
    font-weight: bold;
    color: #333;
    margin-bottom: 10px;
}

.login-subtitle {
    color: #666;
    font-size: 16px;
}

.login-form {
    width: 100%;
}

.input-group {
    position: relative;
    margin-bottom: 25px;
}

.input-label {
    display: block;
    color: #555;
    font-weight: 500;
    margin-bottom: 8px;
    font-size: 14px;
}

.input-field {
    width: 100%;
    padding: 15px 20px 15px 50px;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    font-size: 16px;
    background: white;
    color: #333;
    transition: all 0.3s ease;
}

.input-field::placeholder {
    color: #999;
}

.input-field:focus {
    outline: none;
    border-color: var(--main-color);
    box-shadow: 0 0 0 3px rgba(93, 63, 211, 0.1);
    background: #fafafa;
}

.input-icon {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: #999;
    font-size: 16px;
    transition: color 0.3s ease;
}

.input-field:focus + .input-icon {
    color: var(--main-color);
}

.clear-btn {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    background: #ccc;
    border: none;
    border-radius: 50%;
    width: 22px;
    height: 22px;
    cursor: pointer;
    color: white;
    font-size: 12px;
    display: none;
    transition: all 0.3s ease;
}

.clear-btn:hover {
    background: #999;
}

.password-toggle {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #999;
    cursor: pointer;
    font-size: 16px;
    padding: 5px;
    transition: color 0.3s ease;
}

.password-toggle:hover {
    color: var(--main-color);
}

.quick-actions {
    display: flex;
    justify-content: space-between;
    margin-bottom: 30px;
    font-size: 14px;
}

.quick-link {
    color: var(--main-color);
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 5px 10px;
    border-radius: 8px;
}

.quick-link:hover {
    color: var(--dark-purple);
    background: var(--light-purple);
}

.login-btn {
    width: 100%;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 12px;
    padding: 16px 20px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    margin-bottom: 30px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(93, 63, 211, 0.3);
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(93, 63, 211, 0.4);
}

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

.login-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.agreement {
    display: flex;
    align-items: flex-start;
    font-size: 13px;
    color: #666;
    margin-bottom: 25px;
    line-height: 1.5;
}

.agreement input[type="checkbox"] {
    margin-right: 10px;
    margin-top: 3px;
    transform: scale(1.2);
    accent-color: var(--main-color);
}

.agreement a {
    color: var(--main-color);
    text-decoration: none;
}

.agreement a:hover {
    text-decoration: underline;
}

.register-prompt {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #eee;
    font-size: 14px;
    color: #666;
}

.register-link {
    color: var(--main-color);
    text-decoration: none;
    font-weight: 600;
    margin-left: 5px;
}

.register-link:hover {
    color: var(--dark-purple);
    text-decoration: underline;
}

/* 错误状态 */
.input-field.error,
.input-field.input-validation-error
    {
    border-color: #ff4757;
    background-color: #fff5f5;
}

.error-message,
.field-validation-error {
    color: #ff4757;
    font-size: 12px;
    margin-top: 8px;
    margin-left: 5px;
    display: flex;
    align-items: center;
    gap: 5px;
}
.validation-summary-errors {
    color: #ff4757;
}

/* 底部样式 - 复用首页 */
.footer {
    background: #333;
    color: white;
    padding: 40px 0 20px;
    margin-top: auto;
    width: 100%;
    box-sizing: border-box;
}

.footer-container {
    width: 100%;
    margin: 0;
    padding: 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-section h4 {
    color: white;
    margin-bottom: 15px;
    font-size: 16px;
}

.footer-section a {
    color: #ccc;
    text-decoration: none;
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #555;
    padding-top: 20px;
    text-align: center;
    color: #999;
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 15px;
    }

    .nav-links {
        gap: 20px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .main-content {
        padding: 40px 15px;
    }

    .login-container {
        max-width: 100%;
        padding: 40px 25px;
        margin: 0 10px;
    }

    .login-title {
        font-size: 24px;
    }

    .quick-actions {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .login-container {
        padding: 30px 20px;
        border-radius: 15px;
    }

    .input-field {
        padding: 12px 15px 12px 45px;
        font-size: 15px;
    }

    .input-icon {
        left: 15px;
        font-size: 14px;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.login-container {
    animation: fadeInUp 0.6s ease-out;
}

.top-nav {
    animation: slideInDown 0.5s ease-out;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 8px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}