:root {
            --primary: #d97706;
            --primary-dark: #b45309;
            --primary-soft: #fffbeb;
            --primary-glow: #fef3c7;
            --accent: #f59e0b;
            --accent-soft: #fff7ed;
            --text: #1e293b;
            --text-muted: #64748b;
            --bg: #fefce8;
            --card: #ffffff;
            --border: rgba(245, 158, 11, 0.18);
            --glass: rgba(255, 255, 255, 0.78);
            --shadow-sm: 0 1px 3px rgba(180, 83, 9, 0.05);
            --shadow-md: 0 6px 20px rgba(180, 83, 9, 0.09);
            --shadow-lg: 0 14px 36px rgba(180, 83, 9, 0.12);
            --radius: 14px;
            --radius-sm: 8px;
            --radius-xs: 5px;
            --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
            --font-stack: "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 15px;
            scroll-padding-top: 80px;
        }
        body {
            font-family: var(--font-stack);
            background: var(--bg);
            color: var(--text);
            line-height: 1.72;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background-image: radial-gradient(ellipse at 50% 0%, #fef9e7 0%, #fefce8 40%, #fdf6e3 100%);
            background-attachment: fixed;
        }

        /* ===== Header ===== */
        header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--glass);
            backdrop-filter: blur(18px) saturate(150%);
            -webkit-backdrop-filter: blur(18px) saturate(150%);
            border-bottom: 1px solid var(--border);
            transition: box-shadow var(--transition);
        }
        header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .nav-container {
            max-width: 1240px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 24px;
            gap: 20px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--primary-dark);
            text-decoration: none;
            letter-spacing: -0.3px;
            white-space: nowrap;
            transition: opacity var(--transition);
        }
        .logo:hover {
            opacity: 0.82;
        }
        .logo img {
            height: 30px;
            width: auto;
            display: block;
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            gap: 4px;
            list-style: none;
            flex-wrap: wrap;
            align-items: center;
        }
        .nav-links a {
            display: inline-block;
            padding: 8px 16px;
            border-radius: 24px;
            text-decoration: none;
            color: var(--text);
            font-weight: 500;
            font-size: 0.94rem;
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-links a:hover {
            background: var(--primary-glow);
            color: var(--primary-dark);
        }
        .nav-links a.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            box-shadow: 0 2px 10px rgba(217, 119, 6, 0.3);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-wrap {
            max-width: 1240px;
            margin: 0 auto;
            padding: 14px 24px 0;
        }
        .breadcrumb {
            font-size: 0.84rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary-dark);
        }
        .breadcrumb .sep {
            color: #d4a96a;
            user-select: none;
        }

        /* ===== Main Layout ===== */
        .container {
            max-width: 1240px;
            margin: 24px auto 50px;
            padding: 0 24px;
            display: grid;
            grid-template-columns: 2.8fr 1fr;
            gap: 36px;
            align-items: start;
        }
        @media (max-width: 1024px) {
            .container {
                grid-template-columns: 1fr;
                gap: 26px;
            }
        }
        @media (max-width: 640px) {
            .nav-container {
                flex-direction: column;
                gap: 8px;
                padding: 10px 14px;
            }
            .nav-links {
                gap: 2px;
            }
            .nav-links a {
                padding: 6px 11px;
                font-size: 0.83rem;
            }
            .container {
                padding: 0 10px;
                margin-top: 14px;
            }
            article {
                padding: 22px 16px !important;
            }
            article h1 {
                font-size: 1.55rem !important;
            }
            article h2 {
                font-size: 1.18rem !important;
            }
        }

        /* ===== Article ===== */
        article {
            background: var(--card);
            padding: 38px 34px;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
        }
        article h1 {
            font-size: 1.9rem;
            margin-bottom: 16px;
            color: #0f172a;
            line-height: 1.35;
            letter-spacing: -0.4px;
            position: relative;
            padding-bottom: 14px;
        }
        article h1::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 56px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 3px;
        }
        article h2 {
            font-size: 1.36rem;
            margin: 34px 0 12px;
            padding-left: 14px;
            border-left: 4px solid var(--primary);
            color: #1e293b;
            letter-spacing: -0.2px;
        }
        article h3 {
            font-size: 1.1rem;
            margin: 20px 0 9px;
            color: #334155;
            font-weight: 600;
        }
        article p {
            margin-bottom: 15px;
            color: #475569;
            text-align: justify;
            hyphens: auto;
        }
        article ul,
        article ol {
            margin-bottom: 16px;
            padding-left: 22px;
            color: #475569;
        }
        article li {
            margin-bottom: 6px;
        }
        article code {
            background: #fef3c7;
            padding: 2px 7px;
            border-radius: 4px;
            font-size: 0.88em;
            color: #92400e;
            font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
        }
        article pre {
            background: #1e293b;
            color: #e2e8f0;
            padding: 18px 20px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            font-size: 0.84rem;
            line-height: 1.6;
            margin: 16px 0;
            border: 1px solid #334155;
        }
        article pre code {
            background: transparent;
            color: inherit;
            padding: 0;
            font-size: inherit;
            border-radius: 0;
        }

        .inline-image-box {
            width: 100%;
            aspect-ratio: 16 / 9;
            max-height: 380px;
            background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin: 22px 0;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(245, 158, 11, 0.15);
        }
        .inline-image-box img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }
        .inline-video-box {
            position: relative;
            padding-bottom: 56.25%;
            height: 0;
            overflow: hidden;
            border-radius: var(--radius-sm);
            background: #0f172a;
            margin: 22px 0;
        }
        .inline-video-box iframe {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            border: 0;
        }

        /* ===== Highlight / Oath Box ===== */
        .oath-box {
            background: linear-gradient(135deg, #fffbeb 0%, #fef9e7 40%, #fff7ed 100%);
            border: 2px solid #fcd34d;
            padding: 26px 28px;
            border-radius: var(--radius);
            margin: 26px 0;
            position: relative;
            text-align: center;
        }
        .oath-box::before {
            content: '🔓';
            position: absolute;
            top: -18px;
            left: 50%;
            transform: translateX(-50%);
            font-size: 1.6rem;
            background: #fff;
            padding: 0 12px;
            border-radius: 50%;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
        }
        .oath-box h3 {
            margin-top: 6px;
            color: #92400e;
            font-size: 1.25rem;
            letter-spacing: -0.3px;
        }
        .oath-box .oath-badge {
            display: inline-block;
            background: #d97706;
            color: #fff;
            padding: 4px 14px;
            border-radius: 16px;
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 0.4px;
            margin: 8px 0 4px;
            text-transform: uppercase;
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 16px;
            margin: 24px 0;
        }
        .info-card {
            background: #fafbfc;
            border: 1px solid #e8ecf1;
            border-radius: var(--radius-sm);
            padding: 20px 17px;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .info-card:hover {
            border-color: var(--accent);
            box-shadow: 0 4px 18px rgba(217, 119, 6, 0.1);
            transform: translateY(-2px);
        }
        .info-card .icon {
            font-size: 1.7rem;
            margin-bottom: 7px;
            display: block;
        }
        .info-card h4 {
            font-size: 0.98rem;
            color: #1e293b;
            margin-bottom: 5px;
            font-weight: 600;
        }
        .info-card p {
            font-size: 0.86rem;
            color: #64748b;
            margin-bottom: 0;
            text-align: left;
        }

        /* ===== Spec Table ===== */
        .spec-table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            font-size: 0.88rem;
            border-radius: var(--radius-sm);
            overflow: hidden;
        }
        .spec-table th,
        .spec-table td {
            padding: 11px 14px;
            text-align: left;
            border-bottom: 1px solid #f1f5f9;
        }
        .spec-table th {
            background: #fffbeb;
            font-weight: 600;
            color: #1e293b;
            white-space: nowrap;
            font-size: 0.84rem;
            text-transform: uppercase;
            letter-spacing: 0.3px;
        }
        .spec-table tr:hover td {
            background: #fefce8;
        }

        /* ===== Timeline ===== */
        .timeline {
            position: relative;
            padding-left: 28px;
            margin: 20px 0;
            border-left: 2px dashed #fcd34d;
        }
        .timeline-item {
            position: relative;
            margin-bottom: 18px;
            padding-left: 16px;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -34px;
            top: 4px;
            width: 10px;
            height: 10px;
            background: var(--primary);
            border-radius: 50%;
            border: 2px solid #fff;
            box-shadow: 0 0 0 2px var(--accent);
        }
        .timeline-item h4 {
            font-weight: 600;
            color: #1e293b;
            margin-bottom: 3px;
            font-size: 0.95rem;
        }
        .timeline-item p {
            font-size: 0.87rem;
            color: #64748b;
            margin: 0;
        }

        /* ===== Aside ===== */
        aside {
            display: flex;
            flex-direction: column;
            gap: 22px;
            position: sticky;
            top: 88px;
        }
        @media (max-width: 1024px) {
            aside {
                position: static;
                flex-direction: row;
                flex-wrap: wrap;
                gap: 14px;
            }
            aside .widget {
                flex: 1 1 220px;
                min-width: 200px;
            }
        }
        .widget {
            background: var(--card);
            padding: 20px 18px;
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
        }
        .widget h4 {
            font-size: 0.98rem;
            margin-bottom: 10px;
            color: #0f172a;
            border-bottom: 2px solid #fef3c7;
            padding-bottom: 7px;
            font-weight: 600;
        }
        .widget ul {
            list-style: none;
            padding-left: 0;
        }
        .widget li {
            margin-bottom: 9px;
        }
        .widget a {
            text-decoration: none;
            color: var(--text);
            font-size: 0.88rem;
            transition: color var(--transition);
            display: inline-block;
        }
        .widget a:hover {
            color: var(--primary-dark);
        }
        .widget .tag {
            display: inline-block;
            background: var(--primary-glow);
            color: #92400e;
            padding: 3px 10px;
            border-radius: 14px;
            font-size: 0.77rem;
            font-weight: 500;
            margin: 2px 3px;
            transition: all var(--transition);
        }
        .widget .tag:hover {
            background: var(--primary);
            color: #fff;
            cursor: default;
        }
        .widget .tag-accent {
            background: #fff7ed;
            color: #c2410c;
            font-weight: 600;
        }

        /* ===== Footer ===== */
        footer {
            background: #fff;
            border-top: 1px solid var(--border);
            padding: 38px 24px 18px;
            margin-top: 48px;
        }
        .footer-container {
            max-width: 1240px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 26px;
        }
        @media (max-width: 768px) {
            .footer-container {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 480px) {
            .footer-container {
                grid-template-columns: 1fr;
            }
        }
        .footer-brand h5 {
            font-size: 1.02rem;
            color: #0f172a;
            margin-bottom: 7px;
        }
        .footer-brand p {
            font-size: 0.83rem;
            color: var(--text-muted);
            margin: 0;
        }
        .footer-links h5 {
            font-size: 0.93rem;
            color: #0f172a;
            margin-bottom: 10px;
        }
        .footer-links ul {
            list-style: none;
            padding: 0;
        }
        .footer-links li {
            margin-bottom: 7px;
        }
        .footer-links a {
            text-decoration: none;
            color: var(--text-muted);
            font-size: 0.84rem;
            transition: color var(--transition);
        }
        .footer-links a:hover {
            color: var(--primary-dark);
        }
        .footer-bottom {
            max-width: 1240px;
            margin: 20px auto 0;
            padding-top: 16px;
            border-top: 1px solid #fef3c7;
            text-align: center;
            font-size: 0.79rem;
            color: var(--text-muted);
        }