/* ==========================================================================
   AegisAuth 声明页样式 - 技术网格企业风 × 亚麻商务风
   --------------------------------------------------------------------------
   设计语言：
     技术网格企业风 —— 蓝图白底画布、点阵底纹、单一橙色 CTA、轻阴影分层
     亚麻商务风    —— 亚麻磨砂质感底纹、清新商务配色
   色板（与 landing.css 保持一致）：
     --color-brand  #2B6C6F  品牌青绿
     --color-accent #FF6B35  橙色 CTA
     --color-linen  #F5F2EC  亚麻底色
     --color-surface #FFFFFF 卡片白
   布局：左侧 sticky 目录导航 + 右侧章节内容（桌面双栏，移动单栏）
   无障碍：WCAG 2.1 AA 对比度、focus-visible 轮廓、prefers-reduced-motion
   ========================================================================== */

/* ============ 1. 页头 Hero ============ */
/* 顶部留白需避开 fixed .site-header（约 61px 高），保证标题不被遮挡 */
.disclaimer-hero {
    position: relative;
    padding: 120px 0 48px;
    background-color: var(--color-linen, #F5F2EC);
    background-image:
        radial-gradient(circle at 1px 1px, rgba(43, 108, 111, 0.08) 1px, transparent 0);
    background-size: 24px 24px;
    border-bottom: 1px solid var(--color-border, #E5E7EB);
    overflow: hidden;
}

.disclaimer-hero-inner {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.disclaimer-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text, #1F2937);
    margin: 0 0 12px;
    letter-spacing: -0.02em;
    line-height: 1.3;
}

.disclaimer-subtitle {
    font-size: 1.05rem;
    color: var(--color-text-muted, #6B7280);
    margin: 0 0 24px;
    line-height: 1.6;
}

.disclaimer-meta {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 8px 20px;
    background: var(--color-surface, #FFFFFF);
    border: 1px solid var(--color-border, #E5E7EB);
    border-radius: 999px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    font-size: 0.875rem;
}

.disclaimer-meta-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.disclaimer-meta-label {
    color: var(--color-text-muted, #6B7280);
}

.disclaimer-meta-value {
    color: var(--color-brand, #2B6C6F);
    font-weight: 600;
}

.disclaimer-meta-divider {
    color: var(--color-text-dim, #9CA3AF);
}

/* ============ 2. 主体布局 ============ */
.disclaimer-body {
    padding: 48px 0 80px;
    background: var(--color-bg, #F8F9FA);
}

.disclaimer-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 40px;
    align-items: start;
}

/* ============ 3. 左侧目录导航 ============ */
.disclaimer-toc {
    position: sticky;
    top: 100px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
}

.disclaimer-toc-inner {
    background: var(--color-surface, #FFFFFF);
    border: 1px solid var(--color-border, #E5E7EB);
    border-radius: 8px;
    padding: 20px 16px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.disclaimer-toc-title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-muted, #6B7280);
    margin: 0 0 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-border-soft, #F0F1F3);
}

.disclaimer-toc-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.disclaimer-toc-link {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 8px 10px;
    border-radius: 6px;
    text-decoration: none;
    color: var(--color-text-muted, #6B7280);
    font-size: 0.875rem;
    line-height: 1.5;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.disclaimer-toc-link:hover {
    background: var(--color-bg-muted, #F3F4F6);
    color: var(--color-text, #1F2937);
}

.disclaimer-toc-link:focus-visible {
    outline: 2px solid var(--color-brand, #2B6C6F);
    outline-offset: 2px;
}

.disclaimer-toc-link.active {
    background: var(--color-brand-bg, #F0F7F7);
    color: var(--color-brand, #2B6C6F);
    font-weight: 600;
}

.disclaimer-toc-link.active .disclaimer-toc-no {
    color: var(--color-brand, #2B6C6F);
}

.disclaimer-toc-no {
    flex-shrink: 0;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-text-dim, #9CA3AF);
    min-width: 20px;
    padding-top: 1px;
}

.disclaimer-toc-text {
    flex: 1;
    word-break: break-word;
}

/* ============ 4. 右侧章节内容 ============ */
.disclaimer-content {
    min-width: 0; /* 防止内容溢出 grid */
}

.disclaimer-section {
    background: var(--color-surface, #FFFFFF);
    border: 1px solid var(--color-border, #E5E7EB);
    border-radius: 8px;
    padding: 32px 40px;
    margin-bottom: 24px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    scroll-margin-top: 100px;
}

.disclaimer-section-head {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--color-border-soft, #F0F1F3);
}

.disclaimer-section-no {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    padding: 0 8px;
    background: var(--color-brand-bg, #F0F7F7);
    color: var(--color-brand, #2B6C6F);
    font-size: 0.875rem;
    font-weight: 700;
    border-radius: 6px;
}

.disclaimer-section-title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-text, #1F2937);
    margin: 0;
    line-height: 1.4;
}

.disclaimer-section-content {
    font-size: 0.9375rem;
    line-height: 1.9;
    color: var(--color-text, #1F2937);
    word-break: break-word;
}

.disclaimer-section-content p {
    margin: 0 0 16px;
    text-indent: 2em;
}
.disclaimer-section-content p:last-child {
    margin-bottom: 0;
}

.disclaimer-section-content strong,
.disclaimer-section-content b {
    font-weight: 600;
    color: var(--color-text, #1F2937);
}

/* ============ 5. 返回顶部按钮 ============ */
.disclaimer-back-top {
    position: fixed;
    right: 32px;
    bottom: 32px;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-brand, #2B6C6F);
    color: #FFFFFF;
    border: none;
    border-radius: 50%;
    box-shadow: 0 4px 12px rgba(43, 108, 111, 0.3);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
    z-index: 100;
    text-decoration: none;
}

.disclaimer-back-top svg {
    width: 20px;
    height: 20px;
}

.disclaimer-back-top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.disclaimer-back-top:hover {
    background: var(--color-brand-dark, #1F5052);
    box-shadow: 0 6px 16px rgba(43, 108, 111, 0.4);
}

.disclaimer-back-top:focus-visible {
    outline: 2px solid var(--color-accent, #FF6B35);
    outline-offset: 3px;
}

/* ============ 6. 滚动条美化（Webkit） ============ */
.disclaimer-toc::-webkit-scrollbar {
    width: 4px;
}

.disclaimer-toc::-webkit-scrollbar-track {
    background: transparent;
}

.disclaimer-toc::-webkit-scrollbar-thumb {
    background: var(--color-border, #E5E7EB);
    border-radius: 2px;
}

.disclaimer-toc::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-dim, #9CA3AF);
}

/* ============ 7. 响应式适配 ============ */

/* 平板：缩小 TOC 宽度 */
@media (max-width: 1023px) {
    .disclaimer-layout {
        grid-template-columns: 200px 1fr;
        gap: 24px;
    }

    .disclaimer-section {
        padding: 24px 24px;
    }

    /* 平板端 fixed header 仍约 61px，需保留避让空间 */
    .disclaimer-hero {
        padding: 100px 0 48px;
    }

    .disclaimer-title {
        font-size: 1.75rem;
    }
}

/* 手机：TOC 折叠为水平滚动条，置于内容上方 */
@media (max-width: 639px) {
    /* 移动端 header 含 nav-toggle 按钮，约 72px 高，顶部需更大避让 */
    .disclaimer-hero {
        padding: 100px 0 32px;
    }

    .disclaimer-title {
        font-size: 1.5rem;
    }

    .disclaimer-subtitle {
        font-size: 0.9375rem;
    }

    .disclaimer-meta {
        flex-wrap: wrap;
        justify-content: center;
        gap: 8px;
        padding: 6px 14px;
        font-size: 0.8125rem;
    }

    .disclaimer-body {
        padding: 32px 0 60px;
    }

    .disclaimer-layout {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .disclaimer-toc {
        position: static;
        max-height: none;
        order: 2;
    }

    .disclaimer-toc-inner {
        padding: 12px;
    }

    .disclaimer-toc-title {
        margin-bottom: 8px;
        padding-bottom: 8px;
    }

    .disclaimer-toc-list {
        flex-direction: row;
        overflow-x: auto;
        gap: 6px;
        padding-bottom: 4px;
        -webkit-overflow-scrolling: touch;
    }

    .disclaimer-toc-item {
        flex-shrink: 0;
    }

    .disclaimer-toc-link {
        white-space: nowrap;
        padding: 6px 10px;
    }

    .disclaimer-content {
        order: 1;
    }

    .disclaimer-section {
        padding: 20px 16px;
    }

    .disclaimer-section-head {
        gap: 8px;
        margin-bottom: 12px;
        padding-bottom: 12px;
    }

    .disclaimer-section-no {
        min-width: 28px;
        height: 28px;
        font-size: 0.8125rem;
    }

    .disclaimer-section-title {
        font-size: 1rem;
    }

    .disclaimer-section-content {
        font-size: 0.875rem;
        line-height: 1.7;
    }

    .disclaimer-back-top {
        right: 16px;
        bottom: 16px;
        width: 40px;
        height: 40px;
    }

    .disclaimer-back-top svg {
        width: 18px;
        height: 18px;
    }
}

/* ============ 8. 无障碍：减弱动画 ============ */
@media (prefers-reduced-motion: reduce) {
    .disclaimer-toc-link,
    .disclaimer-back-top {
        transition: none;
    }

    .disclaimer-back-top {
        transform: none;
    }
}

/* ==========================================================================
   9. 服务条款页专用样式（.terms-layout / .terms-content）
   --------------------------------------------------------------------------
   与声明页的差异：
   - 声明页用 .disclaimer-layout（2 列网格 240px + 1fr，含 TOC 侧边栏）
   - 条款页用 .terms-layout（单列居中，条款内容为纯 HTML h2/h3/p）
   复用 .disclaimer-hero（页头）与 .disclaimer-back-top（返回顶部）样式
   ========================================================================== */

/* ============ 9.1 单列居中布局 ============ */
.terms-layout {
    max-width: 820px;
    margin: 0 auto;
    display: block; /* 覆盖 .disclaimer-layout 的 grid 行为 */
}

/* ============ 9.2 条款内容卡片容器 ============ */
.terms-content {
    background: var(--color-surface, #FFFFFF);
    border: 1px solid var(--color-border, #E5E7EB);
    border-radius: 8px;
    padding: 40px 48px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    min-width: 0;
}

/* ============ 9.3 条款内容排版（纯 HTML h2/h3/p） ============ */
.terms-content h2 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-text, #1F2937);
    margin: 0 0 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-brand-bg, #F0F7F7);
    letter-spacing: -0.01em;
    line-height: 1.4;
}

.terms-content h2:first-child {
    margin-top: 0;
}

.terms-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-brand, #2B6C6F);
    margin: 28px 0 12px;
    line-height: 1.4;
    scroll-margin-top: 100px; /* 锚点跳转避开 fixed header */
}

.terms-content h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text, #1F2937);
    margin: 20px 0 10px;
    line-height: 1.4;
}

.terms-content p {
    font-size: 0.9375rem;
    line-height: 1.85;
    color: var(--color-text, #1F2937);
    margin: 0 0 14px;
    word-break: break-word;
}

.terms-content p:last-child {
    margin-bottom: 0;
}

.terms-content ul,
.terms-content ol {
    font-size: 0.9375rem;
    line-height: 1.85;
    color: var(--color-text, #1F2937);
    margin: 0 0 14px;
    padding-left: 1.5em;
}

.terms-content ul li,
.terms-content ol li {
    margin-bottom: 6px;
    word-break: break-word;
}

.terms-content strong,
.terms-content b {
    font-weight: 600;
    color: var(--color-text, #1F2937);
}

.terms-content a {
    color: var(--color-brand, #2B6C6F);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s ease;
}

.terms-content a:hover {
    border-bottom-color: var(--color-brand, #2B6C6F);
}

.terms-content a:focus-visible {
    outline: 2px solid var(--color-brand, #2B6C6F);
    outline-offset: 2px;
    border-radius: 2px;
}

.terms-content blockquote {
    margin: 16px 0;
    padding: 12px 20px;
    border-left: 4px solid var(--color-brand, #2B6C6F);
    background: var(--color-bg-muted, #F3F4F6);
    color: var(--color-text-muted, #6B7280);
    font-style: italic;
    border-radius: 0 4px 4px 0;
}

.terms-content code {
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: 0.875em;
    padding: 2px 6px;
    background: var(--color-bg-muted, #F3F4F6);
    border-radius: 3px;
    color: var(--color-text, #1F2937);
}

.terms-content hr {
    border: none;
    border-top: 1px solid var(--color-border-soft, #F0F1F3);
    margin: 24px 0;
}

/* ============ 9.4 响应式适配 ============ */
@media (max-width: 1023px) {
    .terms-content {
        padding: 28px 28px;
    }

    .terms-content h2 {
        font-size: 1.3rem;
    }
}

@media (max-width: 639px) {
    .terms-content {
        padding: 20px 18px;
    }

    .terms-content h2 {
        font-size: 1.2rem;
        margin-bottom: 12px;
        padding-bottom: 10px;
    }

    .terms-content h3 {
        font-size: 1rem;
        margin: 22px 0 10px;
    }

    .terms-content p,
    .terms-content ul,
    .terms-content ol {
        font-size: 0.875rem;
        line-height: 1.75;
    }
}