*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --blue: #4f6ef7;
            --blue-deep: #3b56e0;
            --warm: #f59e4b;
            --ink: #1a1a2e;
            --stone: #6b7280;
            --snow: #fafafa;
            --card-bg: #ffffff;
            --border-light: rgba(0, 0, 0, 0.05);
            --shadow-card: 0 20px 40px -12px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 28px 50px -14px rgba(0, 0, 0, 0.10);
            --radius-lg: 22px;
            --radius-xl: 28px;
            --radius-sm: 14px;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
            color: var(--ink);
            background-color: var(--snow);
            overflow-x: hidden;
            letter-spacing: -0.01em;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            line-height: 1.5;
        }
        .ambient-glow {
            position: fixed;
            top: -200px;
            right: -100px;
            width: 700px;
            height: 700px;
            background: radial-gradient(circle, rgba(79, 110, 247, 0.05) 0%, rgba(255,255,255,0) 70%);
            z-index: -1;
            pointer-events: none;
        }
        /* 导航栏——与首页完全一致 */
        header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(250, 250, 250, 0.78);
            backdrop-filter: blur(22px);
            -webkit-backdrop-filter: blur(22px);
            border-bottom: 1px solid var(--border-light);
            transition: background 0.3s ease;
        }
        .nav-container {
            max-width: 1260px;
            margin: 0 auto;
            padding: 0 28px;
            height: 76px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo-box a {
            display: flex;
            align-items: center;
            text-decoration: none;
            color: var(--ink);
            font-weight: 800;
            font-size: 20px;
            letter-spacing: -0.03em;
            gap: 10px;
            white-space: nowrap;
        }
        .logo-img {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            flex-shrink: 0;
        }
        .menu-box {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .menu-box a {
            color: #4b5563;
            text-decoration: none;
            margin-left: 28px;
            font-size: 14.5px;
            font-weight: 600;
            transition: color 0.2s ease;
            position: relative;
            white-space: nowrap;
        }
        .menu-box a:hover,
        .menu-box a.active {
            color: var(--ink);
        }
        .menu-box a.active::after {
            content: '';
            position: absolute;
            bottom: -6px;
            left: 0;
            right: 0;
            height: 2.5px;
            background: var(--blue);
            border-radius: 3px;
        }
        .github-cta {
            background: var(--ink);
            color: #ffffff !important;
            padding: 10px 20px;
            border-radius: 40px;
            font-size: 13.5px !important;
            transition: transform 0.2s, background-color 0.2s !important;
            margin-left: 32px !important;
        }
        .github-cta:hover {
            background: #2d2d44 !important;
            transform: scale(1.03);
            color: #ffffff !important;
        }
        .github-cta::after {
            display: none !important;
        }

        /* 主布局：侧边栏 + 内容区 */
        .guide-layout {
            max-width: 1260px;
            margin: 0 auto;
            padding: 50px 28px 100px 28px;
            display: flex;
            gap: 50px;
        }
        .guide-sidebar {
            width: 250px;
            position: sticky;
            top: 130px;
            height: calc(100vh - 160px);
            overflow-y: auto;
            flex-shrink: 0;
            background: rgba(255,255,255,0.6);
            backdrop-filter: blur(10px);
            border-radius: var(--radius-lg);
            padding: 20px 16px;
            border: 1px solid var(--border-light);
            box-shadow: 0 1px 3px rgba(0,0,0,0.03);
        }
        .sidebar-nav {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-nav li {
            margin-bottom: 10px;
        }
        .sidebar-nav a {
            text-decoration: none;
            font-size: 13.5px;
            color: #64748b;
            font-weight: 600;
            transition: all 0.2s;
            display: block;
            padding: 8px 12px;
            border-radius: 10px;
            line-height: 1.4;
            letter-spacing: -0.01em;
        }
        .sidebar-nav a:hover,
        .sidebar-nav a.active {
            color: #4f6ef7;
            background: rgba(79,110,247,0.06);
        }
        .sidebar-nav .emoji-bullet {
            margin-right: 6px;
            font-size: 14px;
        }

        .guide-content {
            flex-grow: 1;
            max-width: 800px;
            min-width: 0;
        }
        .guide-content h1 {
            font-size: 44px;
            font-weight: 900;
            letter-spacing: -0.03em;
            margin: 0 0 12px 0;
            line-height: 1.15;
            background: linear-gradient(135deg, #4f6ef7 0%, #f59e4b 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .meta-stamp {
            font-size: 13px;
            color: #94a3b8;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 44px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .meta-stamp .paw-icon {
            font-size: 16px;
        }
        .guide-content section {
            margin-bottom: 70px;
            scroll-margin-top: 130px;
        }
        .guide-content h2 {
            font-size: 28px;
            font-weight: 800;
            letter-spacing: -0.02em;
            border-bottom: 1px solid rgba(0,0,0,0.06);
            padding-bottom: 14px;
            margin: 0 0 22px 0;
            color: var(--ink);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .guide-content h3 {
            font-size: 19px;
            font-weight: 700;
            margin: 30px 0 14px 0;
            color: #0f172a;
        }
        .guide-content p {
            font-size: 15.5px;
            line-height: 1.7;
            color: #334155;
            margin: 0 0 22px 0;
        }
        .guide-content strong {
            color: #000000;
            font-weight: 600;
        }
        .showcase-image {
            width: 100%;
            height: auto;
            max-height: 460px;
            object-fit: cover;
            border-radius: 18px;
            border: 1px solid rgba(0,0,0,0.05);
            background: linear-gradient(135deg, #f0f4ff 0%, #fafafa 50%, #fff8f0 100%);
            margin: 30px 0;
            display: block;
            box-shadow: 0 12px 35px -12px rgba(0,0,0,0.05);
        }
        .code-block {
            background: #0c0f1a;
            color: #f8fafc;
            padding: 24px;
            border-radius: 16px;
            font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
            font-size: 13.5px;
            line-height: 1.6;
            overflow-x: auto;
            margin: 28px 0;
            border: 1px solid rgba(255,255,255,0.05);
            letter-spacing: 0;
        }
        .callout-box {
            background: #f8fafc;
            border-left: 4px solid var(--blue);
            padding: 22px 24px;
            border-radius: 0 16px 16px 0;
            margin: 32px 0;
            font-size: 14.5px;
            color: #475569;
        }
        .callout-box p {
            margin: 0;
        }
        /* 猫爪提示卡片 */
        .paw-tip {
            background: #ffffff;
            border: 1px solid rgba(79,110,247,0.15);
            border-radius: 18px;
            padding: 20px 24px;
            margin: 28px 0;
            display: flex;
            gap: 16px;
            align-items: flex-start;
            box-shadow: 0 4px 12px rgba(0,0,0,0.02);
        }
        .paw-tip .tip-icon {
            font-size: 28px;
            line-height: 1;
        }
        .paw-tip .tip-content {
            flex: 1;
        }
        .paw-tip .tip-content p {
            margin: 0;
            font-size: 14.5px;
            color: #334155;
            line-height: 1.6;
        }
        .paw-tip .tip-content strong {
            color: #4f6ef7;
        }
        /* 快速调优清单 */
        .tuning-checklist {
            background: #ffffff;
            border: 1px solid rgba(0,0,0,0.05);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            margin: 40px 0;
            box-shadow: 0 1px 3px rgba(0,0,0,0.03);
        }
        .tuning-checklist h3 {
            margin-top: 0;
            font-size: 20px;
            font-weight: 800;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .checklist-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px 24px;
            margin-top: 18px;
        }
        .checklist-item {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            font-size: 14px;
            color: #334155;
            line-height: 1.5;
        }
        .checklist-item .check-icon {
            color: #4f6ef7;
            font-weight: bold;
            font-size: 16px;
            flex-shrink: 0;
        }
        /* 页脚 */
        footer {
            background: #ffffff;
            border-top: 1px solid rgba(0, 0, 0, 0.04);
            padding: 60px 0 40px 0;
        }
        .footer-container {
            max-width: 1260px;
            margin: 0 auto;
            padding: 0 28px;
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            gap: 40px;
        }
        .footer-brand h4 {
            margin: 0 0 10px 0;
            font-size: 17px;
            font-weight: 800;
            color: var(--ink);
        }
        .footer-brand p {
            margin: 0;
            font-size: 13.5px;
            color: #6b7280;
            max-width: 300px;
            line-height: 1.6;
        }
        .footer-links-grid {
            display: flex;
            gap: 70px;
        }
        .footer-col h5 {
            margin: 0 0 18px 0;
            font-size: 13px;
            font-weight: 700;
            color: var(--ink);
            text-transform: uppercase;
            letter-spacing: 0.06em;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col li {
            margin-bottom: 10px;
        }
        .footer-col a {
            text-decoration: none;
            font-size: 13.5px;
            color: #6b7280;
            transition: color 0.2s;
        }
        .footer-col a:hover {
            color: var(--ink);
        }

        @media (max-width: 1024px) {
            .guide-layout {
                flex-direction: column;
            }
            .guide-sidebar {
                position: relative;
                top: 0;
                width: 100%;
                height: auto;
                display: flex;
                overflow-x: auto;
                padding: 12px 12px;
                gap: 12px;
                border-radius: var(--radius-lg);
                margin-bottom: 20px;
            }
            .sidebar-nav {
                display: flex;
                gap: 8px;
                white-space: nowrap;
            }
            .sidebar-nav li {
                margin-bottom: 0;
            }
            .sidebar-nav a {
                padding: 6px 14px;
                font-size: 12.5px;
                border-radius: 20px;
            }
            .guide-content h1 {
                font-size: 34px;
            }
            .checklist-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-container {
                padding: 0 16px;
                height: 64px;
            }
            .menu-box {
                display: none;
            }
            .guide-layout {
                padding: 30px 18px 70px 18px;
            }
            .guide-content h1 {
                font-size: 30px;
            }
            .guide-content h2 {
                font-size: 22px;
            }
            .footer-container {
                flex-direction: column;
                gap: 36px;
            }
            .footer-links-grid {
                gap: 36px;
                flex-wrap: wrap;
            }
            .code-block {
                font-size: 12px;
                padding: 16px;
            }
        }