/* 认证页面样式 */
.auth-section {
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 20px 20px;
}

.auth-container {
    width: 100%;
    max-width: 450px;
}

.auth-card {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    padding: 2.5rem;
    position: relative;
    overflow: hidden;
}

.auth-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #2563eb, #fbbf24);
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-header h1 {
    font-size: 2rem;
    color: #1f2937;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.auth-header p {
    color: #64748b;
    font-size: 1rem;
}

/* 表单样式 */
.auth-form {
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #374151;
    font-weight: 500;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.form-group label i {
    color: #2563eb;
    font-size: 1rem;
}

.form-group input {
    width: 100%;
    padding: 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: #f9fafb;
}

.form-group input:focus {
    outline: none;
    border-color: #2563eb;
    background: white;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group input.error {
    border-color: #ef4444;
    background: #fef2f2;
}

.form-group input.success {
    border-color: #10b981;
    background: #f0fdf4;
}

.form-tip {
    display: block;
    font-size: 0.8rem;
    color: #6b7280;
    margin-top: 0.25rem;
    line-height: 1.4;
}

/* 密码输入框 */
.password-input {
    position: relative;
}

.password-toggle {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #6b7280;
    cursor: pointer;
    padding: 0.25rem;
    transition: color 0.3s ease;
}

.password-toggle:hover {
    color: #2563eb;
}

/* 手机号输入框 */
.phone-input {
    display: flex;
    gap: 0.5rem;
}

.phone-input input {
    flex: 1;
}

.btn-verify {
    padding: 1rem 1.5rem;
    background: #2563eb;
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
    min-width: 120px;
}

.btn-verify:hover:not(:disabled) {
    background: #1d4ed8;
    transform: translateY(-1px);
}

.btn-verify:disabled {
    background: #9ca3af;
    cursor: not-allowed;
    transform: none;
}

/* 表单选项 */
.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.9rem;
    color: #374151;
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 18px;
    height: 18px;
    border: 2px solid #d1d5db;
    border-radius: 4px;
    position: relative;
    transition: all 0.3s ease;
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
    background: #2563eb;
    border-color: #2563eb;
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 12px;
    font-weight: bold;
}

.forgot-link {
    color: #2563eb;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.forgot-link:hover {
    color: #1d4ed8;
    text-decoration: underline;
}

/* 提交按钮 */
.btn-submit {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-submit:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.3);
}

.btn-submit:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.btn-submit .btn-loading {
    display: none;
}

.btn-submit.loading .btn-text {
    display: none;
}

.btn-submit.loading .btn-loading {
    display: inline-block;
}

/* 分割线 */
.auth-divider {
    text-align: center;
    margin: 2rem 0;
    position: relative;
}

.auth-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: #e5e7eb;
}

.auth-divider span {
    background: white;
    padding: 0 1rem;
    color: #6b7280;
    font-size: 0.9rem;
}

/* 社交登录 */
.social-login {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.btn-social {
    flex: 1;
    padding: 0.75rem;
    border: 2px solid #e5e7eb;
    background: white;
    color: #374151;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.btn-social:hover {
    border-color: #2563eb;
    color: #2563eb;
    transform: translateY(-1px);
}

.btn-wechat:hover {
    border-color: #10b981;
    color: #10b981;
}

.btn-qq:hover {
    border-color: #3b82f6;
    color: #3b82f6;
}

/* 页脚 */
.auth-footer {
    text-align: center;
    color: #6b7280;
    font-size: 0.9rem;
}

.auth-footer a {
    color: #2563eb;
    text-decoration: none;
    font-weight: 500;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* 错误提示 */
.error-message {
    color: #ef4444;
    font-size: 0.8rem;
    margin-top: 0.25rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.error-message i {
    font-size: 0.75rem;
}

/* 成功提示 */
.success-message {
    color: #10b981;
    font-size: 0.8rem;
    margin-top: 0.25rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.success-message i {
    font-size: 0.75rem;
}

/* 响应式设计 */
@media (max-width: 480px) {
    .auth-card {
        padding: 2rem 1.5rem;
    }
    
    .auth-header h1 {
        font-size: 1.75rem;
    }
    
    .social-login {
        flex-direction: column;
    }
    
    .form-options {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .phone-input {
        flex-direction: column;
    }
    
    .btn-verify {
        min-width: auto;
        width: 100%;
    }
}

/* 动画效果 */
.auth-card {
    animation: slideInUp 0.6s ease;
}

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

/* 加载状态 */
.loading {
    pointer-events: none;
}

.loading .btn-submit {
    background: #9ca3af;
}

/* 验证码倒计时 */
.btn-verify.countdown {
    background: #9ca3af;
    color: #6b7280;
}

.btn-verify.countdown::after {
    content: attr(data-countdown);
}

/* 表单验证状态 */
.form-group.validating input {
    border-color: #f59e0b;
    background: #fffbeb;
}

.form-group.validated input {
    border-color: #10b981;
    background: #f0fdf4;
}

/* 密码强度指示器 */
.password-strength {
    margin-top: 0.5rem;
    height: 4px;
    background: #e5e7eb;
    border-radius: 2px;
    overflow: hidden;
}

.password-strength-bar {
    height: 100%;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.password-strength-bar.weak {
    width: 33.33%;
    background: #ef4444;
}

.password-strength-bar.medium {
    width: 66.66%;
    background: #f59e0b;
}

.password-strength-bar.strong {
    width: 100%;
    background: #10b981;
}