/*
 * DeepLocals 文档中心样式
 * 设计方向：冷调中性底色 + 墨色排版 + 品牌蓝强调，分层卡片与细线描边；
 * 深色模式通过 html.dark 切换，由 index.html 中的脚本与官网主题同步。
 */
:root {
    --primary: #2f5bea;
    --primary-hover: #2449c9;
    --primary-light: rgba(47, 91, 234, 0.08);
    --primary-soft: rgba(47, 91, 234, 0.05);
    --primary-ring: rgba(47, 91, 234, 0.22);
    --accent-2: #7c4dff;

    --text-main: #0f172a;
    --text-muted: #475569;
    --text-secondary: #475569;
    --text-light: #64748b;

    --bg-main: #f5f6f9;
    --bg-glow: rgba(47, 91, 234, 0.07);
    --sidebar-bg: rgba(250, 251, 253, 0.82);
    --card-bg: #ffffff;
    --surface-2: #f8f9fc;
    --border-color: #e4e7ee;
    --border-strong: #d5dae4;

    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04), 0 1px 1px rgba(15, 23, 42, 0.03);
    --shadow-md: 0 1px 2px rgba(15, 23, 42, 0.04), 0 8px 24px -8px rgba(15, 23, 42, 0.10);
    --shadow-lg: 0 2px 4px rgba(15, 23, 42, 0.05), 0 24px 48px -12px rgba(15, 23, 42, 0.18);

    --radius: 14px;
    --radius-sm: 8px;
    --sidebar-width: 284px;
    --toc-width: 220px;
    --header-height: 64px;
    --font-sans: 'Inter', 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei UI', 'Microsoft YaHei', 'Segoe UI', system-ui, -apple-system, sans-serif;
}

html.dark {
    color-scheme: dark;
    --primary: #8aa8ff;
    --primary-hover: #a9c0ff;
    --primary-light: rgba(138, 168, 255, 0.12);
    --primary-soft: rgba(138, 168, 255, 0.06);
    --primary-ring: rgba(138, 168, 255, 0.28);
    --accent-2: #b39dff;

    --text-main: #e8ebf2;
    --text-muted: #a3acbd;
    --text-secondary: #a3acbd;
    --text-light: #7d8799;

    --bg-main: #0a0d14;
    --bg-glow: rgba(96, 125, 255, 0.10);
    --sidebar-bg: rgba(13, 17, 26, 0.82);
    --card-bg: #11151f;
    --surface-2: #151a26;
    --border-color: rgba(255, 255, 255, 0.07);
    --border-strong: rgba(255, 255, 255, 0.12);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 1px 2px rgba(0, 0, 0, 0.4), 0 10px 28px -10px rgba(0, 0, 0, 0.6);
    --shadow-lg: 0 2px 4px rgba(0, 0, 0, 0.4), 0 28px 56px -16px rgba(0, 0, 0, 0.7);
}

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    background: var(--bg-main);
}

body {
    font-family: var(--font-sans);
    line-height: 1.7;
    color: var(--text-main);
    background:
        radial-gradient(1200px 520px at 70% -180px, var(--bg-glow), transparent 70%),
        var(--bg-main);
    background-attachment: fixed;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    transition: background-color 0.25s ease, color 0.25s ease;
}

::selection {
    background: var(--primary-ring);
}

/* 细滚动条 */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--border-strong) transparent;
}

*::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

*::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border-radius: 8px;
    border: 2px solid transparent;
    background-clip: padding-box;
}

/* 布局结构 */
.layout-container {
    display: flex;
    min-height: calc(100vh - var(--header-height));
}

/* 侧边栏 */
.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    backdrop-filter: saturate(160%) blur(16px);
    -webkit-backdrop-filter: saturate(160%) blur(16px);
    border-right: 1px solid var(--border-color);
    position: fixed;
    top: 0;
    bottom: 0;
    overflow-y: auto;
    z-index: 100;
    padding: 1.5rem 0.875rem 2.5rem;
}

.sidebar-content {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.sidebar-section {
    margin-bottom: 0.125rem;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.55rem 0.75rem;
    color: var(--text-main);
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: background 0.2s, color 0.2s;
    user-select: none;
}

.section-header:hover {
    background: var(--primary-soft);
}

/* 用纯 CSS 绘制折叠箭头，替代字符图标 */
.chevron {
    font-size: 0;
    width: 6px;
    height: 6px;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: rotate(-45deg);
    transition: transform 0.2s ease;
    opacity: 0.45;
    margin-right: 0.25rem;
}

.chevron.down {
    transform: rotate(45deg);
}

.sidebar-menu {
    list-style: none;
    display: none;
    margin: 0.125rem 0 0.5rem 0.875rem;
    padding-left: 0.375rem;
    border-left: 1px solid var(--border-color);
}

.sidebar-menu.expanded {
    display: block;
}

.sidebar-link {
    position: relative;
    display: block;
    padding: 0.42rem 0.75rem;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    line-height: 1.5;
    margin: 1px 0;
    transition: background 0.18s ease, color 0.18s ease;
}

/* 顶层单链接（对话、模型等）与分组标题保持同一视觉层级 */
.sidebar-section > .sidebar-link {
    font-size: 0.8125rem !important;
    font-weight: 600 !important;
    letter-spacing: 0.01em;
    color: var(--text-main) !important;
    padding: 0.55rem 0.75rem;
}

.sidebar-link:hover {
    background: var(--primary-soft);
    color: var(--text-main);
}

.sidebar-link.active,
.sidebar-section > .sidebar-link.active {
    background: var(--primary-light);
    color: var(--primary) !important;
    font-weight: 600;
}

.sidebar-menu .sidebar-link.active::before {
    content: '';
    position: absolute;
    left: -0.45rem;
    top: 22%;
    bottom: 22%;
    width: 2px;
    border-radius: 2px;
    background: var(--primary);
}

/* 主内容区域 */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 3.5rem 4rem 5rem;
    min-height: 100vh;
}

.content-container {
    max-width: 860px;
    margin: 0 auto;
}

.content-section {
    display: none;
}

.content-section.active {
    display: block;
    animation: fadeIn 0.35s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: none; }
}

/* 面包屑 */
#breadcrumb {
    color: var(--text-light) !important;
    font-size: 0.8125rem;
    letter-spacing: 0.01em;
}

#breadcrumb a {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.2s;
}

#breadcrumb a:hover {
    color: var(--primary) !important;
}

#current-breadcrumb {
    color: var(--text-main);
    font-weight: 500;
}

/* 章节头部 */
.section-header-content {
    margin-bottom: 2.25rem;
    padding-bottom: 1.75rem;
    border-bottom: 1px solid var(--border-color);
}

.section-header-content h1 {
    font-size: 2.5rem;
    line-height: 1.2;
    font-weight: 750;
    margin-bottom: 0.75rem;
    letter-spacing: -0.025em;
    background: linear-gradient(120deg, var(--text-main) 30%, var(--primary) 95%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-subtitle {
    font-size: 1.075rem;
    color: var(--text-muted);
}

/* 正文通用排版 */
.main-content h2 {
    letter-spacing: -0.015em;
}

.main-content p,
.main-content li {
    color: var(--text-muted);
}

.main-content strong {
    color: var(--text-main);
    font-weight: 600;
}

.main-content a:not(.cta-button):not(.content-nav-link) {
    color: var(--primary);
    text-decoration-color: var(--primary-ring);
    text-underline-offset: 3px;
}

.main-content code {
    font-family: 'JetBrains Mono', 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
    font-size: 0.85em;
    padding: 0.15em 0.4em;
    border-radius: 6px;
    background: var(--surface-2);
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

.main-content blockquote {
    border-left: 3px solid var(--primary) !important;
    background: var(--primary-soft);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    padding: 0.75rem 1rem !important;
}

/* 步骤引导 */
.step-guide {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    margin: 2.5rem 0;
}

.step {
    border-left: 1px solid var(--border-color);
    padding-left: 1.75rem;
    position: relative;
}

.step::before {
    content: '';
    position: absolute;
    left: -4px;
    top: 0.6rem;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-light);
}

.step:has(.step-number)::before {
    display: none;
}

.step-number {
    position: absolute;
    left: -14px;
    top: 0;
    width: 27px;
    height: 27px;
    background: var(--card-bg);
    color: var(--primary);
    border: 1px solid var(--primary-ring);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.75rem;
    box-shadow: 0 0 0 4px var(--bg-main);
}

.step-content h4 {
    font-size: 1.25rem;
    font-weight: 650;
    letter-spacing: -0.01em;
    margin-bottom: 0.875rem;
    color: var(--text-main);
}

.step-content p {
    margin-bottom: 1rem;
    color: var(--text-muted);
}

.step-image {
    margin-top: 1.5rem;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    padding: 6px;
    box-shadow: var(--shadow-lg);
}

.step-image img {
    width: 100%;
    display: block;
    border-radius: calc(var(--radius) - 6px);
}

/* 截图在深色背景下略降亮度，避免刺眼 */
html.dark .step-image img,
html.dark .main-content img {
    filter: brightness(0.92);
}

/* 核心亮点卡片 */
.feature-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.25rem;
    margin-top: 1.5rem;
}

.feature-card,
.feature-detail-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.feature-card {
    text-align: center;
}

.feature-card:hover,
.feature-detail-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-ring);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.05rem;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* 内容区快捷入口卡片 */
.content-nav-link {
    display: block;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.main-content .content-nav-link {
    background: var(--card-bg) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: 12px !important;
    box-shadow: var(--shadow-sm);
    line-height: 1.65;
}

.main-content .content-nav-link:hover {
    transform: translateY(-2px);
    border-color: var(--primary-ring) !important;
    box-shadow: var(--shadow-md);
}

.main-content .content-nav-link strong {
    font-size: 0.95rem;
}

/* 按钮 */
.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.5rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent-2) 130%);
    color: #fff !important;
    text-decoration: none;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.01em;
    box-shadow: 0 8px 20px -8px var(--primary), inset 0 1px 0 rgba(255, 255, 255, 0.2);
    transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

html.dark .cta-button {
    background: linear-gradient(135deg, #3d63f0 0%, #7c4dff 130%);
}

.cta-button:hover {
    transform: translateY(-1px);
    filter: brightness(1.06);
    box-shadow: 0 12px 28px -10px var(--primary), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.cta-button .icon {
    transition: transform 0.2s ease;
}

.cta-button:hover .icon {
    transform: translateX(3px);
}

/* 版本横幅 */
.version-banner {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: space-between;
    align-items: center;
    padding: 0.9rem 1.25rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    margin-bottom: 2rem;
}

.version-tag {
    background: var(--primary-light);
    color: var(--primary);
    padding: 0.2rem 0.65rem;
    border-radius: 999px;
    font-weight: 700;
    font-size: 0.78rem;
    margin-right: 0.75rem;
    font-variant-numeric: tabular-nums;
}

.update-date {
    font-size: 0.85rem;
    color: var(--text-light);
}

.feature-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.78rem;
    padding: 0.25rem 0.7rem;
    background: var(--surface-2);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    color: var(--text-muted);
}

.badge::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
    opacity: 0.8;
}

/* 提示框 */
.tip-box {
    position: relative;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-soft));
    border: 1px solid var(--primary-ring);
    padding: 1.25rem 1.5rem 1.25rem 1.75rem;
    border-radius: var(--radius);
    margin: 2.5rem 0;
    overflow: hidden;
}

.tip-box::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--primary), var(--accent-2));
}

.tip-box h4 {
    color: var(--text-main);
    font-weight: 650;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tip-box p {
    color: var(--text-muted);
}

/* 侧边栏搜索框 */
.sidebar-search {
    padding: 0 0.25rem 1.25rem;
}

.search-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.search-input-wrapper input {
    width: 100%;
    padding: 0.55rem 0.75rem 0.55rem 2.1rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--card-bg);
    color: var(--text-main);
    font-size: 0.85rem;
    font-family: inherit;
    outline: none;
    box-shadow: var(--shadow-sm);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.search-input-wrapper input::placeholder {
    color: var(--text-light);
}

.search-input-wrapper input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.search-icon {
    position: absolute;
    left: 0.7rem;
    display: flex;
    color: var(--text-light);
    pointer-events: none;
}

/* 底部上一篇 / 下一篇 */
#prev-next-nav {
    border-top: 1px solid var(--border-color) !important;
    gap: 1rem;
}

#prev-next-nav a {
    flex: 1;
    max-width: 48%;
    padding: 1rem 1.25rem;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--card-bg);
    text-decoration: none;
    transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}

#prev-next-nav a:hover {
    border-color: var(--primary-ring);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

#prev-next-nav a span:first-child {
    color: var(--text-light) !important;
}

#prev-next-nav a span:last-child {
    color: var(--text-main) !important;
    font-weight: 600;
    text-decoration: none !important;
}

#prev-next-nav a:hover span:last-child {
    color: var(--primary) !important;
}

/* 右侧本页目录（仅宽屏显示） */
.page-toc {
    display: none;
}

.main-content h2,
.main-content h3,
.main-content h4 {
    scroll-margin-top: 1.5rem;
}

@media (min-width: 1280px) {
    .main-content {
        padding-right: calc(var(--toc-width) + 4rem);
    }

    .page-toc.is-visible {
        display: block;
        position: fixed;
        top: 3.5rem;
        right: 2rem;
        width: var(--toc-width);
        max-height: calc(100vh - 7rem);
        overflow-y: auto;
        padding: 0.25rem 0 0.25rem 1rem;
        border-left: 1px solid var(--border-color);
        animation: fadeIn 0.35s ease-out;
    }
}

.page-toc-title {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--text-light);
    margin-bottom: 0.75rem;
}

.page-toc-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.page-toc-link {
    position: relative;
    display: block;
    padding: 0.3rem 0;
    font-size: 0.8125rem;
    line-height: 1.5;
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.18s ease;
}

.page-toc-link.is-sub {
    padding-left: 0.75rem;
    font-size: 0.78rem;
}

.page-toc-link:hover {
    color: var(--text-main);
}

.page-toc-link.active {
    color: var(--primary);
    font-weight: 600;
}

.page-toc-link.active::before {
    content: '';
    position: absolute;
    left: calc(-1rem - 1px);
    top: 0.35rem;
    bottom: 0.35rem;
    width: 2px;
    border-radius: 2px;
    background: var(--primary);
}

/* 手机端菜单按钮 */
.mobile-toggle-btn {
    display: none;
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 3.25rem;
    height: 3.25rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent-2) 130%);
    color: #fff;
    border: none;
    border-radius: 50%;
    font-size: 1.25rem;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    cursor: pointer;
    align-items: center;
    justify-content: center;
}

/*
 * 章节 HTML 中沿用的 Tailwind 工具类与内联颜色统一映射到主题变量，
 * 让浅色/深色模式都保持一致的品牌色调（选择器限定在 .main-content 内以提高优先级）。
 */
.main-content .text-gray-900 { color: var(--text-main); }
.main-content .text-gray-700,
.main-content .text-gray-600 { color: var(--text-muted); }
.main-content .text-gray-500 { color: var(--text-light); }
.main-content .text-blue-600 { color: var(--primary); }
.main-content .border-gray-200 { border-color: var(--border-color); }
.main-content .bg-white { background-color: var(--card-bg); }
.main-content .border-white,
.main-content .border-blue-100,
.main-content .border-emerald-100 { border-color: var(--border-color); }
.main-content .bg-blue-50\/70 {
    background: linear-gradient(160deg, var(--primary-light), var(--primary-soft) 60%, transparent);
    border-color: var(--border-color);
}
.main-content .bg-emerald-50\/70 { background-color: rgba(16, 185, 129, 0.06); }
.main-content .shadow-sm { box-shadow: var(--shadow-sm); }

.main-content [style*="color: #0969da"] { color: var(--primary) !important; }
.main-content [style*="border-left: 2px solid #0969da"] { border-left-color: var(--primary) !important; }
.main-content [style*="background: #e6f4ff"] {
    background: var(--primary-light) !important;
    border-color: var(--primary-ring) !important;
}
.main-content [style*="background: #f1f5f9"] {
    background: var(--surface-2) !important;
    color: var(--text-light) !important;
    border-color: var(--border-color) !important;
}
.main-content [style*="background:#fff"],
.main-content [style*="background: white"],
.main-content [style*="background: #f8fafc"] {
    background: var(--card-bg) !important;
    border-color: var(--border-color) !important;
    box-shadow: var(--shadow-md) !important;
}
.main-content [style*="border: 1px solid #ddd"] { border-color: var(--border-strong) !important; }
.main-content [style*="color:#555"] { color: var(--text-muted) !important; }

/* 更新日志版本块 */
.version-block {
    padding-bottom: 2.5rem;
    border-bottom: 1px solid var(--border-color);
}

.version-block:last-child {
    border-bottom: 0;
}

/* 响应式设计 */
@media (max-width: 960px) {
    .mobile-toggle-btn {
        display: flex;
    }
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: none;
        background: var(--card-bg);
    }
    .sidebar.mobile-active {
        transform: translateX(0);
        box-shadow: var(--shadow-lg);
    }
    .main-content {
        margin-left: 0;
        padding: 2rem 1.25rem 4rem;
    }
    .section-header-content h1 {
        font-size: 1.85rem;
    }
    #prev-next-nav a {
        max-width: none;
    }
    /* 更新日志右侧日期栏在窄屏下会挤出页面，改为隐藏 */
    .changelog-sidebar {
        display: none !important;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation: none !important;
        transition: none !important;
    }
}