/* ==================== 全局样式 ==================== */
:root {
    --color-primary: #0071e3;
    --color-primary-hover: #0077ed;
    --color-primary-soft: rgba(0, 113, 227, 0.1);
    --color-bg: #ffffff;
    --color-bg-secondary: #f5f5f7;
    --color-bg-tertiary: #f8fafc;
    --color-text: #1d1d1f;
    --color-text-secondary: #6e6e73;
    --color-border: #d2d2d7;
    --color-code-bg: #f6f8fa;
    --color-sidebar-bg: #f8fbff;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.1);
    --sidebar-width: 280px;
    --navbar-height: 60px;
    --toc-width: 220px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: var(--color-text);
    background-color: var(--color-bg);
    background-image: radial-gradient(circle at 0% 0%, rgba(0, 113, 227, 0.08), transparent 42%);
    line-height: 1.7;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height);
    background-color: rgba(255, 255, 255, 0.82);
    backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid rgba(15, 23, 42, 0.08);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
}

.nav-container {
    max-width: 100%;
    height: 100%;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--color-text);
    font-weight: 600;
    font-size: 16px;
    white-space: nowrap;
}

.nav-logo img {
    width: 32px;
    height: 32px;
}

.nav-search {
    flex: 1;
    max-width: 500px;
    position: relative;
}

.nav-search input {
    width: 100%;
    padding: 8px 16px;
    padding-right: 80px;
    border: 1px solid rgba(15, 23, 42, 0.1);
    background-color: rgba(255, 255, 255, 0.78);
    border-radius: 8px;
    font-size: 14px;
    outline: none;
    transition: all 0.2s;
}

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

.search-shortcut {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    padding: 2px 8px;
    background-color: #eef2ff;
    border-radius: 4px;
    font-size: 12px;
    color: var(--color-text-secondary);
}

.nav-links {
    display: flex;
    gap: 24px;
    align-items: center;
}

.nav-links a {
    color: var(--color-text);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
    white-space: nowrap;
}

.nav-links a:hover {
    color: var(--color-primary);
}

/* ==================== 文档容器 ==================== */
.docs-container {
    display: flex;
    margin-top: var(--navbar-height);
    min-height: calc(100vh - var(--navbar-height));
}

/* ==================== 侧边栏 ==================== */
.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, #fbfcff 0%, var(--color-sidebar-bg) 100%);
    border-right: 1px solid rgba(15, 23, 42, 0.08);
    position: fixed;
    left: 0;
    top: var(--navbar-height);
    bottom: 0;
    overflow-y: auto;
    transition: transform 0.3s;
}

.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid rgba(15, 23, 42, 0.08);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sidebar-header h3 {
    font-size: 16px;
    font-weight: 600;
}

.sidebar-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.sidebar-toggle span {
    width: 20px;
    height: 2px;
    background-color: var(--color-text);
    transition: all 0.3s;
}

.sidebar-content {
    padding: 16px;
}

.sidebar-section {
    margin-bottom: 24px;
}

.sidebar-section-title {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
    padding: 0 12px;
}

.sidebar-menu {
    list-style: none;
}

.sidebar-menu li {
    margin-bottom: 4px;
}

.sidebar-menu a {
    display: block;
    padding: 8px 12px;
    color: var(--color-text);
    text-decoration: none;
    border-radius: 10px;
    font-size: 14px;
    transition: all 0.2s;
}

.sidebar-menu a:hover {
    background: linear-gradient(135deg, rgba(0, 113, 227, 0.12), rgba(0, 163, 255, 0.12));
    color: var(--color-primary);
}

.sidebar-menu a.active {
    background: linear-gradient(135deg, var(--color-primary) 0%, #00a3ff 100%);
    color: white;
    box-shadow: 0 8px 20px rgba(0, 113, 227, 0.24);
}

/* ==================== 主内容区 ==================== */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    gap: 24px;
    padding: 40px 24px;
    max-width: calc(100% - var(--sidebar-width));
}

.doc-article {
    flex: 1;
    max-width: 800px;
    margin: 0 auto;
}

.doc-article h1 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 16px;
    line-height: 1.2;
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.doc-article .lead {
    font-size: 20px;
    color: var(--color-text-secondary);
    margin-bottom: 40px;
}

.doc-article h2 {
    font-size: 32px;
    font-weight: 600;
    margin-top: 48px;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(15, 23, 42, 0.1);
}

.doc-article h3 {
    font-size: 24px;
    font-weight: 600;
    margin-top: 32px;
    margin-bottom: 12px;
}

.doc-article h4 {
    font-size: 18px;
    font-weight: 600;
    margin-top: 24px;
    margin-bottom: 8px;
}

.doc-article p {
    margin-bottom: 16px;
}

.doc-article ul,
.doc-article ol {
    margin-bottom: 16px;
    padding-left: 24px;
}

.doc-article li {
    margin-bottom: 8px;
}

.doc-article code {
    background-color: var(--color-code-bg);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
    font-family: "Consolas", "Monaco", monospace;
}

.doc-article pre {
    background: linear-gradient(135deg, #0f172a 0%, #172554 100%);
    padding: 16px;
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: 16px;
}

.doc-article pre code {
    background: none;
    padding: 0;
    color: #c9d1d9;
}

.doc-article img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 16px 0;
    cursor: pointer;
    transition: transform 0.2s;
}

.doc-article img:hover {
    transform: scale(1.02);
}

.doc-article blockquote {
    border-left: 4px solid var(--color-primary);
    padding-left: 16px;
    margin: 16px 0;
    color: var(--color-text-secondary);
    font-style: italic;
}

.doc-article table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
}

.doc-article th,
.doc-article td {
    padding: 12px;
    border: 1px solid var(--color-border);
    text-align: left;
}

.doc-article th {
    background-color: var(--color-bg-secondary);
    font-weight: 600;
}

/* ==================== 特性卡片 ==================== */
.feature-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin: 40px 0;
}

.feature-card {
    padding: 24px;
    background: linear-gradient(180deg, #ffffff 0%, var(--color-bg-tertiary) 100%);
    border-radius: 16px;
    border: 1px solid rgba(15, 23, 42, 0.08);
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.card-icon {
    font-size: 32px;
    margin-bottom: 12px;
}

.feature-card h3 {
    font-size: 18px;
    margin: 0 0 8px 0;
}

.feature-card p {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 12px;
}

.card-link {
    color: var(--color-primary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
}

.card-link:hover {
    text-decoration: underline;
}

/* ==================== 信息区块 ==================== */
.info-section {
    background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
    padding: 24px;
    border-radius: 16px;
    border: 1px solid rgba(15, 23, 42, 0.08);
    margin: 40px 0;
}

.cta-section {
    text-align: center;
    padding: 48px 24px;
    background: linear-gradient(135deg, var(--color-primary) 0%, #2563eb 55%, #00a3ff 100%);
    color: white;
    border-radius: 12px;
    margin: 40px 0;
}

.cta-section h2 {
    color: white;
    border: none;
    margin: 0 0 16px 0;
}

.cta-section p {
    margin-bottom: 24px;
    opacity: 0.9;
}

.btn-primary {
    display: inline-block;
    padding: 12px 32px;
    background-color: white;
    color: var(--color-primary);
    text-decoration: none;
    border-radius: 24px;
    font-weight: 500;
    transition: all 0.2s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(0, 113, 227, 0.24);
}

/* ==================== 目录 ==================== */
.toc {
    width: var(--toc-width);
    position: sticky;
    top: calc(var(--navbar-height) + 40px);
    align-self: flex-start;
    max-height: calc(100vh - var(--navbar-height) - 80px);
    overflow-y: auto;
}

.toc h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--color-text-secondary);
}

.toc nav {
    font-size: 13px;
}

.toc nav a {
    display: block;
    padding: 4px 0;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

.toc nav a:hover {
    color: var(--color-primary);
}

.toc nav a.active {
    color: var(--color-primary);
    font-weight: 500;
}

/* ==================== 搜索模态框 ==================== */
.search-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    padding: 80px 20px;
}

.search-modal.active {
    display: block;
}

.search-modal-content {
    max-width: 600px;
    margin: 0 auto;
    background-color: #ffffff;
    border-radius: 12px;
    border: 1px solid rgba(15, 23, 42, 0.08);
    box-shadow: 0 18px 50px rgba(20, 26, 36, 0.14);
    overflow: hidden;
}

.search-modal-header {
    display: flex;
    align-items: center;
    padding: 16px;
    border-bottom: 1px solid var(--color-border);
}

.search-modal-header input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 16px;
    padding: 8px;
}

.search-close {
    background: none;
    border: none;
    font-size: 32px;
    cursor: pointer;
    color: var(--color-text-secondary);
    padding: 0 8px;
}

.search-results {
    max-height: 400px;
    overflow-y: auto;
    padding: 8px;
}

.search-result-item {
    padding: 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.search-result-item:hover {
    background-color: var(--color-bg-secondary);
}

.search-result-title {
    font-weight: 600;
    margin-bottom: 4px;
}

.search-result-excerpt {
    font-size: 14px;
    color: var(--color-text-secondary);
}

/* ==================== 图片预览模态框 ==================== */
.image-modal {
    display: none;
    position: fixed;
    z-index: 3000;
    padding-top: 60px;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.9);
}

.image-modal.active {
    display: block;
}

.image-modal-content {
    margin: auto;
    display: block;
    max-width: 90%;
    max-height: 80vh;
    animation: zoom 0.3s;
}

@keyframes zoom {
    from {
        transform: scale(0);
    }
    to {
        transform: scale(1);
    }
}

.image-close {
    position: absolute;
    top: 15px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
}

.image-caption {
    margin: auto;
    display: block;
    width: 80%;
    max-width: 700px;
    text-align: center;
    color: #ccc;
    padding: 10px 0;
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1200px) {
    .toc {
        display: none;
    }
}

@media (max-width: 768px) {
    :root {
        --sidebar-width: 0;
    }

    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .sidebar-toggle {
        display: flex;
    }

    .main-content {
        margin-left: 0;
        max-width: 100%;
        padding: 24px 16px;
    }

    .nav-search {
        display: none;
    }

    .nav-links {
        gap: 16px;
    }

    .nav-links a {
        font-size: 13px;
    }

    .doc-article h1 {
        font-size: 32px;
    }

    .doc-article .lead {
        font-size: 18px;
    }

    .feature-cards {
        grid-template-columns: 1fr;
    }
}

/* ==================== 滚动条样式 ==================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-secondary);
}