.animate-on-scroll{opacity:1!important;transform:none!important;}


/* ============================================================
   清爽调研报告风格 v5.0 — DeepSeek V4 深度调研
   布局：文档站两栏 (sidebar-nav + content-area → content-inner)
   ============================================================ */
:root {
    /* 五色语义调色板 */
    --color-success:      #059669;
    --color-success-light:#10B981;
    --color-success-dark: #047857;
    --color-success-50:   #ECFDF5;
    --color-success-100:  #D1FAE5;
    --color-danger:       #E11D48;
    --color-danger-light: #F43F5E;
    --color-danger-50:    #FFF1F2;
    --color-warning:      #D97706;
    --color-warning-light:#F59E0B;
    --color-warning-50:   #FFFBEB;
    --color-info:         #2563EB;
    --color-info-light:   #3B82F6;
    --color-info-50:      #EFF6FF;
    --color-info-100:     #DBEAFE;
    --color-purple:       #7C3AED;
    --color-purple-light: #8B5CF6;
    --color-purple-50:    #F5F3FF;
    --color-purple-100:   #EDE9FE;

    /* 中性色 */
    --color-text-primary:   #1C1917;
    --color-text-secondary: #57534E;
    --color-text-muted:     #78716C;
    --color-text-placeholder:#A8A29E;
    --color-border:         #E7E5E4;
    --color-border-light:   #F5F5F4;
    --color-bg:             #F8FAFB;
    --color-bg-card:        #FFFFFF;
    --color-bg-table-header:#FAFAF9;

    /* 渐变 */
    --gradient-success: linear-gradient(135deg, #059669 0%, #10B981 100%);
    --gradient-hero:    linear-gradient(135deg, #059669 0%, #2563EB 50%, #7C3AED 100%);
    --gradient-badge:   linear-gradient(135deg, #ECFDF5 0%, #EFF6FF 100%);
    --gradient-mesh:
        radial-gradient(at 20% 20%, rgba(5,150,105,0.08) 0%, transparent 50%),
        radial-gradient(at 80% 80%, rgba(37,99,235,0.06) 0%, transparent 50%),
        radial-gradient(at 50% 50%, rgba(124,58,237,0.04) 0%, transparent 50%);

    /* 阴影 */
    --shadow-xs:           0 1px 2px rgba(0,0,0,0.04);
    --shadow-sm:           0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-card:         0 2px 8px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md:           0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.04);
    --shadow-lg:           0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
    --shadow-glow-success: 0 4px 14px rgba(5,150,105,0.15);
    --shadow-hover:        0 8px 24px rgba(5,150,105,0.18), 0 2px 8px rgba(5,150,105,0.10);
    --shadow-float:        0 12px 32px rgba(0,0,0,0.10), 0 4px 8px rgba(0,0,0,0.06);

    /* 间距 */
    --spacing-xs: 4px; --spacing-sm: 8px; --spacing-md: 16px;
    --spacing-lg: 24px; --spacing-xl: 32px; --spacing-2xl: 40px; --spacing-3xl: 48px;

    /* 圆角 */
    --radius-sm: 8px; --radius-md: 12px; --radius-lg: 16px;
    --radius-xl: 20px; --radius-full: 9999px;

    /* 字体 */
    --font-family:         "DM Sans", -apple-system, "Noto Sans SC", "PingFang SC", sans-serif;
    --font-family-heading: "DM Sans", -apple-system, "Noto Sans SC", sans-serif;
    --font-family-mono:    "JetBrains Mono", "SF Mono", "Fira Code", monospace;

    /* 字号 */
    --heading-1: 34px; --heading-2: 22px; --heading-3: 17px;
    --body-text: 15px; --body-small: 14px; --caption: 12px;
    --data-large: 32px; --data-medium: 24px;

    /* 动画 */
    --transition-fast:   150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* 布局 v5.0 */
    --sidebar-width: 228px;
    --content-max:   920px;
    --content-pad:   56px;
}

/* ===== 基础重置 ===== */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-family);
    font-size: var(--body-text);
    line-height: 1.7;
    color: var(--color-text-secondary);
    background: var(--color-bg);
    background-image: var(--gradient-mesh);
    background-attachment: fixed;
}
a { color: var(--color-info); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== Skip to content（无障碍）===== */
.skip-to-content {
    position: fixed; top: -100%; left: 16px; z-index: 9999;
    background: var(--color-info); color: #fff;
    padding: 8px 16px; border-radius: var(--radius-sm);
    font-size: 13px; font-weight: 600;
    transition: top 0.2s;
}
.skip-to-content:focus { top: 16px; }

/* ===== 两栏布局 v5.0 ===== */
.layout-wrapper {
    display: flex;
    min-height: 100vh;
    position: relative;
}

/* ===== 侧边栏（TOC 锚点导航）===== */
.sidebar-nav {
    width: var(--sidebar-width);
    flex-shrink: 0;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    overflow-x: hidden;
    background: #fff;
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    padding: 24px 0 24px;
    scrollbar-width: thin;
    scrollbar-color: #E7E5E4 transparent;
    z-index: 50;
    transition: width 280ms ease, transform 280ms ease;
}
.sidebar-nav::-webkit-scrollbar { width: 4px; }
.sidebar-nav::-webkit-scrollbar-thumb { background: #E7E5E4; border-radius: 4px; }

.sidebar-doc-title {
    font-size: 12px; font-weight: 700; color: var(--color-text-primary);
    letter-spacing: 0.04em; padding: 0 16px 16px;
    border-bottom: 1px solid var(--color-border-light);
    margin-bottom: 12px;
    line-height: 1.4;
}
.sidebar-doc-title .doc-tag {
    display: inline-block; margin-bottom: 6px;
    font-size: 10px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
    color: var(--color-success); background: var(--color-success-50);
    padding: 2px 7px; border-radius: 4px;
}

.toc-section { padding: 0 8px; }
.toc-group-label {
    font-size: 10px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
    color: var(--color-text-placeholder); padding: 8px 8px 4px; margin-bottom: 2px;
}
.toc-link {
    display: flex; align-items: center; gap: 8px;
    padding: 7px 10px; border-radius: 6px;
    font-size: 13px; font-weight: 500; color: var(--color-text-muted);
    text-decoration: none; cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast),
                border-color var(--transition-fast);
    border-left: 3px solid transparent;
    margin-bottom: 1px; line-height: 1.4;
    position: relative;
}
.toc-link:hover {
    background: var(--color-info-50); color: var(--color-text-primary);
    text-decoration: none;
}
.toc-link.toc-active {
    background: var(--color-success-50); color: var(--color-success-dark);
    border-left-color: var(--color-success); font-weight: 600;
}
.toc-link:focus-visible {
    outline: 2px solid var(--color-info); outline-offset: 1px;
}
.toc-link.toc-sub {
    font-size: 12px; padding-left: 22px; color: var(--color-text-placeholder);
}
.toc-link.toc-sub.toc-active { color: var(--color-success); }

/* 阅读进度条（在 sidebar 底部）*/
.reading-progress-wrap {
    margin-top: auto; padding: 16px 16px 0;
    border-top: 1px solid var(--color-border-light);
}
.reading-progress-label {
    font-size: 10px; font-weight: 600; color: var(--color-text-placeholder);
    letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 6px;
}
.reading-progress-track {
    height: 4px; background: var(--color-border-light); border-radius: 2px; overflow: hidden;
}
.reading-progress-fill {
    height: 100%; width: 0%; background: var(--gradient-success); border-radius: 2px;
    transition: width 0.15s linear;
}

/* ===== 折叠按钮（fixed，不跟着侧边栏 overflow）===== */
.sidebar-collapse-btn {
    position: fixed;
    top: 50%; left: var(--sidebar-width);
    transform: translate(-50%, -50%);
    width: 20px; height: 36px;
    background: #fff; border: 1px solid var(--color-border);
    border-radius: 10px; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    font-size: 11px; color: var(--color-text-muted);
    box-shadow: var(--shadow-sm);
    transition: left 280ms ease, background var(--transition-fast), color var(--transition-fast);
    z-index: 60;
}
.sidebar-collapse-btn:hover { background: var(--color-info-50); color: var(--color-info); }
.sidebar-collapse-btn.collapsed-pos { left: 12px; }

/* 移动端抽屉遮罩 */
.sidebar-backdrop {
    position: fixed; inset: 0;
    background: rgba(15, 23, 42, 0.45);
    opacity: 0; visibility: hidden;
    transition: opacity 0.28s ease, visibility 0.28s ease;
    z-index: 150;
}
.sidebar-backdrop.show { opacity: 1; visibility: visible; }
body.no-scroll { overflow: hidden; }
@media (min-width: 769px) { .sidebar-backdrop { display: none; } }

/* 折叠状态 */
.layout-wrapper.sidebar-collapsed .sidebar-nav {
    width: 0; min-width: 0; padding-left: 0; padding-right: 0;
    overflow: hidden; border-right: none;
}
.layout-wrapper.sidebar-collapsed .sidebar-collapse-btn { left: 12px; }

/* ===== 内容区 ===== */
.content-area {
    flex: 1; min-width: 0;
    display: flex; flex-direction: column; align-items: center;
}
.content-inner {
    width: 100%; max-width: var(--content-max);
    padding: 48px var(--content-pad) 120px;
}

/* ===== Hero 头部 ===== */
.doc-header {
    margin-bottom: var(--spacing-3xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid var(--color-border-light);
}
.header-badge {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 5px 12px;
    background: var(--gradient-badge);
    border: 1px solid rgba(5,150,105,0.2);
    border-radius: var(--radius-full);
    font-size: 11px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase;
    color: var(--color-success); margin-bottom: var(--spacing-md);
}
.header-title {
    font-family: var(--font-family-heading);
    font-size: var(--heading-1); font-weight: 800;
    line-height: 1.15; letter-spacing: -0.025em;
    background: var(--gradient-hero);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
    text-wrap: balance;
}
.header-meta {
    font-size: 13px; color: var(--color-text-muted);
    display: flex; flex-wrap: wrap; align-items: center; gap: 12px;
    margin-bottom: var(--spacing-md);
}
.header-meta-item { display: flex; align-items: center; gap: 4px; }
.header-tags {
    display: flex; flex-wrap: wrap; gap: 6px;
}
.tag {
    padding: 3px 10px;
    background: var(--color-bg); border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: 11px; color: var(--color-text-muted);
}

/* ===== 章节标签（v5.0 延伸线版）===== */
.doc-chapter-label {
    display: flex; align-items: center; gap: 10px;
    font-size: 11px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase;
    color: var(--color-text-placeholder);
    padding: 36px 0 10px;
}
.doc-chapter-label::after {
    content: ''; flex: 1; height: 1px; background: var(--color-border-light);
}

/* ===== 数据格（Stat Card — v5.0 颜色顶边）===== */
.stats-grid {
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md); margin-bottom: var(--spacing-xl);
}
.stat-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-top: 3px solid var(--stat-accent, var(--color-border));
    border-radius: var(--radius-md);
    padding: 20px; text-align: center;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    will-change: transform;
}
.stat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.stat-info    { --stat-accent: #2563EB; }
.stat-success { --stat-accent: #059669; }
.stat-warning { --stat-accent: #D97706; }
.stat-purple  { --stat-accent: #7C3AED; }
.stat-value {
    font-size: var(--data-medium); font-weight: 800;
    font-family: var(--font-family-heading);
    font-variant-numeric: tabular-nums;
    background: var(--gradient-hero);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.stat-label { font-size: var(--caption); color: var(--color-text-muted); margin-top: 4px; }

/* ===== 章节块 ===== */
.section-block {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg) var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-card);
}
.section-block h2 {
    font-family: var(--font-family-heading);
    font-size: var(--heading-2); font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}
.section-block h3 {
    font-size: var(--heading-3); font-weight: 600;
    color: var(--color-text-primary);
    margin: 20px 0 12px;
}
.section-block p { margin-bottom: 12px; font-size: var(--body-small); }

/* ===== 章节概览图 ===== */
.section-overview {
    background: var(--color-bg);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-md); margin-bottom: var(--spacing-lg);
    text-align: center; overflow-x: auto;
}
.section-overview svg { max-width: 100%; height: auto; }

/* ===== 发现框 ===== */
.finding {
    background: linear-gradient(135deg, #F0FDF4 0%, #ECFDF5 100%);
    border-left: 3px solid var(--color-success);
    padding: 16px 20px; margin-bottom: 16px;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}
.finding-title { font-weight: 700; color: var(--color-success); margin-bottom: 8px; font-size: 14px; }

/* ===== Callout / 洞察框 ===== */
.callout {
    border-left: 3px solid;
    padding: 14px 18px; margin: 16px 0;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-size: var(--body-small);
}
.callout-title { font-weight: 700; margin-bottom: 6px; font-size: 14px; }
.callout-warning { border-color: var(--color-warning); background: linear-gradient(135deg,#FFFBEB 0%,#FEF3C7 100%); }
.callout-warning .callout-title { color: var(--color-warning); }
.callout-info    { border-color: var(--color-info);    background: linear-gradient(135deg,#EFF6FF 0%,#DBEAFE 100%); }
.callout-info    .callout-title { color: var(--color-info); }
.callout-success { border-color: var(--color-success); background: linear-gradient(135deg,#F0FDF4 0%,#D1FAE5 100%); }
.callout-success .callout-title { color: var(--color-success-dark); }
.callout-purple  { border-color: var(--color-purple);  background: linear-gradient(135deg,#F5F3FF 0%,#EDE9FE 100%); }
.callout-purple  .callout-title { color: var(--color-purple); }

/* ===== 表格 ===== */
.table-wrap { overflow-x: auto; margin: 16px 0; border-radius: var(--radius-sm); }
.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.data-table th, .data-table td {
    padding: 11px 14px; text-align: left;
    border-bottom: 1px solid var(--color-border-light);
}
.data-table th {
    background: var(--color-bg-table-header);
    font-weight: 600; color: var(--color-text-primary);
    font-size: 11px; letter-spacing: 0.04em; text-transform: uppercase;
}
.data-table td { color: var(--color-text-secondary); }
.data-table tr:hover td { background: rgba(5,150,105,0.03); }
.highlight-col { background: rgba(5,150,105,0.06) !important; }

/* ===== 状态标签 ===== */
.status-tag {
    display: inline-flex; padding: 2px 8px; border-radius: var(--radius-full);
    font-size: var(--caption); font-weight: 600;
}
.tag-green  { background: rgba(5,150,105,0.1);  color: #059669; }
.tag-blue   { background: rgba(37,99,235,0.1);  color: #2563EB; }
.tag-purple { background: rgba(124,58,237,0.1); color: #7C3AED; }
.tag-red    { background: rgba(225,29,72,0.1);  color: #E11D48; }
.tag-amber  { background: rgba(217,119,6,0.1);  color: #D97706; }

/* ===== 代码块 ===== */
.code-block {
    background: #1E293B; border-radius: var(--radius-sm);
    padding: 16px 20px; overflow-x: auto; margin: 16px 0;
}
.code-block code {
    color: #E2E8F0; font-family: var(--font-family-mono);
    font-size: 12.5px; line-height: 1.7;
}

/* ===== 进度条（视口触发动画）===== */
.bar-wrap { margin: 10px 0; }
.bar-label-row { display:flex; justify-content:space-between; font-size:12px; margin-bottom:4px; }
.bar-track { height: 8px; background: var(--color-border-light); border-radius: 4px; overflow: hidden; }
.bar-fill {
    height: 100%; border-radius: 4px;
    transition: width 1.2s cubic-bezier(.25,.46,.45,.94);
}

/* ===== 滚动入场动画 ===== */
.animate-on-scroll {
    opacity: 0; transform: translateY(14px);
    transition: opacity .42s ease, transform .42s ease;
}
.animate-on-scroll.visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
    .animate-on-scroll { transition: none; opacity: 1; transform: none; }
}
/* Stagger 时序 */
.animate-on-scroll:nth-child(2) { transition-delay: .06s; }
.animate-on-scroll:nth-child(3) { transition-delay: .12s; }
.animate-on-scroll:nth-child(4) { transition-delay: .18s; }
.stat-card:nth-child(2) { transition-delay: .06s; }
.stat-card:nth-child(3) { transition-delay: .12s; }
.stat-card:nth-child(4) { transition-delay: .18s; }

/* ===== Footer ===== */
.footer-block {
    background: linear-gradient(135deg,#F8FAFB 0%,#EEF2F6 100%);
    border: 1px solid var(--color-border); border-radius: var(--radius-lg);
    padding: var(--spacing-xl); box-shadow: var(--shadow-card);
    margin-top: var(--spacing-3xl);
}
.footer-block h4 { font-size: 16px; font-weight: 700; margin-bottom: 8px; color: var(--color-text-primary); }
.footer-block p  { font-size: var(--body-small); color: var(--color-text-secondary); line-height: 1.7; margin-bottom: 12px; }
.btn-primary {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 9px 18px; background: var(--gradient-success);
    color: #fff; border-radius: var(--radius-full);
    font-size: 13px; font-weight: 600; text-decoration: none;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(5,150,105,0.3); text-decoration: none; }

/* ===== 回到顶部 ===== */
.scroll-to-top {
    position: fixed; right: 28px; bottom: 28px;
    width: 40px; height: 40px;
    background: #fff; border: 1px solid var(--color-border);
    border-radius: var(--radius-full); cursor: pointer;
    font-size: 16px; color: var(--color-text-muted);
    display: flex; align-items: center; justify-content: center;
    box-shadow: var(--shadow-md); opacity: 0; pointer-events: none;
    transition: opacity var(--transition-normal), transform var(--transition-normal);
    z-index: 50;
}
.scroll-to-top.visible { opacity: 1; pointer-events: auto; }
.scroll-to-top:hover { transform: translateY(-2px); color: var(--color-info); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    :root { --content-pad: 32px; }
}
@media (max-width: 768px) {
    .sidebar-nav {
        position: fixed; top: 0; left: 0; bottom: 0;
        transform: translateX(-100%); width: min(var(--sidebar-width), 82vw) !important;
        z-index: 200; box-shadow: 0 12px 32px rgba(0,0,0,0.18);
    }
    .sidebar-nav.mobile-open { transform: translateX(0); }
    .sidebar-collapse-btn,
    .sidebar-collapse-btn.collapsed-pos { left: 12px; top: 16px; transform: none; z-index: 210; }
    .content-area { padding-top: 56px; }
    :root { --content-pad: 16px; }
    .content-inner { padding: 44px 16px 80px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .header-title { font-size: 26px; }
    .section-block { padding: var(--spacing-lg); }
}
@media (max-width: 480px) {
    .stats-grid { gap: 10px; }
    .stat-card { padding: 14px; }
    .header-title { font-size: 22px; }
}
    
/* 模型彩色强调标记(red/amber/blue/green)渲染为彩色文字 */
.hl-red { color: #ef4444; font-weight: 600; }
.hl-amber { color: #f59e0b; font-weight: 600; }
.hl-blue { color: #2563eb; font-weight: 600; }
.hl-green { color: #059669; font-weight: 600; }
.hl-em { font-style: italic; }
.hl-strong { font-weight: 700; }