/* Legal Documents and Support Pages Styles */

:root {
    /* 基础色彩系统 */
    --primary-50: #f0f4ff;
    --primary-100: #e0e7ff;
    --primary-200: #c7d2fe;
    --primary-300: #a5b4fc;
    --primary-400: #818cf8;
    --primary-500: #6366f1;
    --primary-600: #4f46e5;
    --primary-700: #4338ca;
    --primary-800: #3730a3;
    --primary-900: #312e81;
    
    /* 灰度色彩 */
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* 背景色 */
    --bg-primary: #0a0a0f;
    --bg-secondary: #1a1a2e;
    --bg-card: rgba(26, 26, 46, 0.9);
    --bg-glass: rgba(255, 255, 255, 0.05);
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    
    /* 间距系统 */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    
    /* 圆角系统 */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    /* 动画过渡 */
    --transition-fast: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* 扩展现有的CSS变量 */
    --legal-bg: var(--gray-900);
    --legal-card-bg: var(--gray-800);
    --legal-border: var(--gray-700);
    --legal-text-primary: var(--gray-100);
    --legal-text-secondary: var(--gray-300);
    --legal-text-muted: var(--gray-400);
    --legal-accent: var(--primary-500);
    --legal-accent-light: var(--primary-400);
}

/* ============= 基础样式 ============= */
body {
    background: var(--bg-primary);
    color: var(--legal-text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

/* ============= 导航栏样式 ============= */
.nav-container {
    width: 100%;
    padding: var(--space-4, 1rem) 0;
    position: relative;
    background: var(--bg-primary, #0a0a0f);
    border-bottom: 1px solid var(--legal-border);
}

.nav-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-6, 1.5rem);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
}

.nav-brand .brand-link {
    display: flex;
    align-items: center;
    gap: var(--space-3, 0.75rem);
    text-decoration: none;
    color: var(--legal-text-primary);
    transition: all var(--transition-fast, 200ms);
}

.nav-brand .brand-link:hover {
    transform: scale(1.02);
}

.brand-icon {
    font-size: 2rem;
    filter: drop-shadow(0 0 10px rgba(103, 102, 241, 0.3));
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.2;
    background: var(--gradient-primary, linear-gradient(135deg, #667eea 0%, #764ba2 100%));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.brand-tagline {
    font-size: 0.875rem;
    color: var(--legal-text-secondary);
    font-weight: 500;
}

.nav-menu {
    display: flex;
    align-items: center;
}

.nav-link {
    color: var(--legal-text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    padding: var(--space-2, 0.5rem) var(--space-4, 1rem);
    border-radius: var(--radius-md, 0.75rem);
    transition: all var(--transition-fast, 200ms);
    border: 1px solid transparent;
}

.nav-link:hover {
    color: var(--legal-accent-light);
    background: rgba(103, 102, 241, 0.1);
    border-color: rgba(103, 102, 241, 0.2);
    transform: translateY(-1px);
}

/* ============= 法律文档样式 ============= */

.legal-document {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
    background: var(--legal-bg);
    min-height: 100vh;
    color: var(--legal-text-primary);
}

/* 文档头部 */
.document-header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem 0;
    border-bottom: 1px solid var(--legal-border);
}

.document-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--legal-text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.document-title svg {
    color: var(--legal-accent);
}

.document-meta {
    color: var(--legal-text-muted);
    font-size: 0.9rem;
}

/* 文档内容 */
.document-content {
    line-height: 1.7;
}

.document-section {
    margin-bottom: 2.5rem;
    background: var(--legal-card-bg);
    border-radius: 12px;
    padding: 2rem;
    border: 1px solid var(--legal-border);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.document-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--legal-accent-light);
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--legal-accent);
    padding-bottom: 0.5rem;
}

.document-section h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--legal-text-primary);
    margin: 1.5rem 0 1rem 0;
}

.section-content p {
    margin-bottom: 1rem;
    color: var(--legal-text-secondary);
}

.section-content ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.section-content li {
    margin-bottom: 0.5rem;
    color: var(--legal-text-secondary);
}

.section-content li strong {
    color: var(--legal-text-primary);
}

/* 特殊确认区域 */
.document-section.acknowledgment {
    background: linear-gradient(135deg, var(--primary-900), var(--primary-800));
    border: 1px solid var(--primary-600);
}

.document-section.acknowledgment h2 {
    color: var(--primary-200);
}

.document-section.acknowledgment .section-content p {
    color: var(--primary-100);
    font-weight: 500;
}

/* 文档底部 */
.document-footer {
    margin-top: 3rem;
    padding: 1.5rem;
    background: var(--legal-card-bg);
    border-radius: 8px;
    border: 1px solid var(--legal-border);
    text-align: center;
    font-size: 0.85rem;
    color: var(--legal-text-muted);
}

/* ============= 支持页面样式 ============= */

.support-page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    background: var(--legal-bg);
    min-height: 100vh;
    color: var(--legal-text-primary);
}

/* 支持页头部 */
.support-header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem 0;
}

.support-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--legal-text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.support-title svg {
    color: var(--legal-accent);
}

.support-description {
    font-size: 1.1rem;
    color: var(--legal-text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* 支持区域 */
.support-section {
    margin-bottom: 3rem;
}

.section-title {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--legal-accent-light);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* 快速帮助网格 */
.quick-help-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.help-card {
    background: var(--legal-card-bg);
    border: 1px solid var(--legal-border);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.help-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
    border-color: var(--legal-accent);
}

.help-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: block;
}

.help-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--legal-text-primary);
    margin-bottom: 0.75rem;
}

.help-card p {
    color: var(--legal-text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

/* 教程网格 */
.tutorial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.tutorial-card {
    background: var(--legal-card-bg);
    border: 1px solid var(--legal-border);
    border-radius: 12px;
    padding: 2rem;
    position: relative;
    transition: all 0.3s ease;
}

.tutorial-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.tutorial-step {
    position: absolute;
    top: -15px;
    left: 2rem;
    background: var(--legal-accent);
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.9rem;
}

.tutorial-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--legal-text-primary);
    margin-bottom: 1rem;
    margin-top: 0.5rem;
}

.tutorial-card p {
    color: var(--legal-text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.tutorial-steps {
    list-style: none;
    padding: 0;
    margin: 0;
}

.tutorial-steps li {
    color: var(--legal-text-secondary);
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
    position: relative;
    font-size: 0.85rem;
}

.tutorial-steps li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--legal-accent);
    font-weight: 600;
}

/* FAQ 容器 */
.faq-container > .faq-category {
    margin-bottom: 2rem;
}

.faq-container > .faq-category:last-child {
    margin-bottom: 0;
}

.faq-category {
    background: var(--legal-card-bg);
    border: 1px solid var(--legal-border);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
}

.faq-category-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--legal-accent-light);
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--legal-border);
    padding-bottom: 0.75rem;
}

.faq-item {
    border-bottom: 1px solid var(--legal-border);
    margin-bottom: 1rem;
}

.faq-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.faq-question {
    padding: 1rem 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 500;
    color: var(--legal-text-primary);
    transition: color 0.3s ease;
}

.faq-question:hover {
    color: var(--legal-accent-light);
}

.faq-arrow {
    transition: transform 0.3s ease;
    color: var(--legal-accent);
}

.faq-question.active .faq-arrow {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
    opacity: 0;
}

.faq-answer.active {
    max-height: 200px;
    opacity: 1;
    padding-bottom: 1rem;
}

.faq-answer p {
    color: var(--legal-text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* 联系方式网格 */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.contact-info h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--legal-text-primary);
    margin-bottom: 1rem;
}

.contact-info p {
    color: var(--legal-text-secondary);
    margin-bottom: 2rem;
}

.contact-methods .contact-method {
    margin-bottom: 1rem;
}

.contact-methods .contact-method:last-child {
    margin-bottom: 0;
}

.contact-method {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    background: var(--legal-card-bg);
    border: 1px solid var(--legal-border);
    border-radius: 8px;
}

.contact-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--legal-text-primary);
    margin-bottom: 0.25rem;
}

.contact-details p {
    color: var(--legal-text-secondary);
    margin-bottom: 0.25rem;
    font-size: 0.9rem;
}

.contact-details small {
    color: var(--legal-text-muted);
    font-size: 0.8rem;
}

/* 联系表单 */
.contact-form {
    background: var(--legal-card-bg);
    border: 1px solid var(--legal-border);
    border-radius: 12px;
    padding: 2rem;
}

.contact-form h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--legal-text-primary);
    margin-bottom: 2rem;
}

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

.support-form .form-label {
    display: block;
    font-weight: 500;
    color: var(--legal-text-primary);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.support-form .form-label.required::after {
    content: " *";
    color: #f87171;
}

.support-form .form-input {
    width: 100%;
    padding: 0.75rem;
    background: var(--gray-800);
    border: 1px solid var(--legal-border);
    border-radius: 6px;
    color: var(--legal-text-primary);
    font-size: 0.9rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.support-form .form-input:focus {
    outline: none;
    border-color: var(--legal-accent);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.support-form textarea.form-input {
    resize: vertical;
    min-height: 120px;
}

/* 服务状态 */
.status-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--legal-card-bg);
    border: 1px solid var(--legal-border);
    border-radius: 10px;
}

.status-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
}

.status-indicator.status-online {
    background: #10b981;
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.5);
}

.status-indicator.status-warning {
    background: #f59e0b;
    box-shadow: 0 0 10px rgba(245, 158, 11, 0.5);
}

.status-indicator.status-error {
    background: #ef4444;
    box-shadow: 0 0 10px rgba(239, 68, 68, 0.5);
}

.status-info h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--legal-text-primary);
    margin-bottom: 0.25rem;
}

.status-text {
    color: var(--legal-text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.status-info small {
    color: var(--legal-text-muted);
    font-size: 0.8rem;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    font-family: inherit;
}

.btn-primary {
    background: var(--legal-accent);
    color: white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn-primary:hover {
    background: var(--primary-600);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.btn-outline {
    background: transparent;
    color: var(--legal-accent);
    border: 1px solid var(--legal-accent);
}

.btn-outline:hover {
    background: var(--legal-accent);
    color: white;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

.btn-full-width {
    width: 100%;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .legal-document,
    .support-page {
        padding: 1rem;
    }
    
    .document-title,
    .support-title {
        font-size: 2rem;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .document-section {
        padding: 1.5rem;
    }
    
    .quick-help-grid,
    .tutorial-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .status-grid {
        grid-template-columns: 1fr;
    }
    
    .help-card {
        padding: 1.5rem;
    }
    
    .tutorial-card {
        padding: 1.5rem;
    }
}