:root {
            --primary: #4f46e5;
            --primary-hover: #4338ca;
            --secondary: #0ea5e9;
            --bg-main: #f8fafc;
            --surface: #ffffff;
            --text-main: #0f172a;
            --text-muted: #64748b;
            --border: #e2e8f0;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
            --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.07);
            --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.08);
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-main);
            color: var(--text-main);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
        }

        header {
            background-color: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            padding: 1rem 1.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .header-logo img {
            height: 36px;
            width: auto;
            object-fit: contain;
        }

        .header-logo h1 {
            font-size: 1.1rem;
            font-weight: 700;
            margin: 0;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: -0.025em;
        }

        nav {
            display: flex;
            gap: 0.35rem;
            overflow-x: auto;
            max-width: 100%;
            padding-bottom: 2px;
        }

        nav::-webkit-scrollbar {
            display: none;
        }

        nav a {
            text-decoration: none;
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.875rem;
            padding: 0.45rem 0.75rem;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            white-space: nowrap;
        }

        nav a:hover {
            color: var(--primary);
            background-color: rgba(79, 70, 229, 0.06);
        }

        .container {
            max-width: 1080px;
            margin: 1.5rem auto;
            padding: 0 1rem;
        }

        .hero {
            text-align: center;
            padding: 3rem 1.5rem;
            background: linear-gradient(135deg, #4f46e5 0%, #0ea5e9 100%);
            color: white;
            border-radius: var(--radius-lg);
            margin-bottom: 2rem;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }

        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at top right, rgba(255,255,255,0.15), transparent 50%);
            pointer-events: none;
        }

        .hero img {
            height: 64px;
            width: auto;
            margin-bottom: 1rem;
            filter: drop-shadow(0 4px 6px rgba(0,0,0,0.15));
        }

        .hero h2 {
            font-size: 2rem;
            font-weight: 800;
            margin: 0 0 0.5rem 0;
            letter-spacing: -0.03em;
        }

        .hero p {
            font-size: 1rem;
            opacity: 0.95;
            margin: 0;
            font-weight: 400;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        section {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        @media (min-width: 768px) {
            section {
                padding: 2.5rem;
                margin-bottom: 2rem;
            }
            .hero {
                padding: 4rem 2rem;
            }
            .hero h2 {
                font-size: 2.5rem;
            }
            .hero p {
                font-size: 1.125rem;
            }
            header {
                padding: 1rem 2rem;
            }
            .container {
                margin: 2.5rem auto;
                padding: 0 1.5rem;
            }
        }

        section:hover {
            box-shadow: var(--shadow-md);
        }

        h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-main);
            border-bottom: 2px solid var(--border);
            padding-bottom: 0.75rem;
            margin-top: 0;
            margin-bottom: 1.5rem;
            letter-spacing: -0.02em;
        }

        @media (min-width: 768px) {
            h3 {
                font-size: 1.35rem;
            }
        }

        h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--primary);
            margin-top: 1.5rem;
            margin-bottom: 0.75rem;
        }

        .grid-2 {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.25rem;
        }

        @media (min-width: 768px) {
            .grid-2 {
                grid-template-columns: 1fr 1fr;
                gap: 1.5rem;
            }
            header {
                flex-direction: row;
            }
        }

        .iframe-wrapper {
            margin-top: 0.5rem;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        iframe {
            width: 100%;
            height: 280px;
            border: none;
            display: block;
            overflow: hidden;
        }

        ul {
            padding-left: 1.25rem;
            color: var(--text-main);
        }

        li {
            margin-bottom: 0.5rem;
            word-break: break-all;
        }

        p {
            margin-top: 0;
            margin-bottom: 1rem;
            color: #334155;
            word-break: break-word;
        }

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

        code {
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
            background-color: #f1f5f9;
            color: var(--primary);
            padding: 0.2em 0.4em;
            border-radius: 4px;
            font-size: 0.85em;
            word-break: break-all;
        }

        .faq-item {
            background-color: #f8fafc;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 1rem;
            margin-bottom: 1rem;
            transition: var(--transition);
        }

        @media (min-width: 768px) {
            .faq-item {
                padding: 1.25rem;
            }
        }

        .faq-item:hover {
            border-color: #cbd5e1;
        }

        .faq-q {
            font-weight: 700;
            color: var(--primary);
            font-size: 1rem;
            margin-bottom: 0.35rem;
        }

        .faq-a {
            color: var(--text-main);
            margin: 0;
        }

        .news-box {
            background: #f8fafc;
            border-left: 4px solid var(--primary);
            padding: 1rem 1.25rem;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin-bottom: 1.25rem;
            border-top: 1px solid var(--border);
            border-right: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        @media (min-width: 768px) {
            .news-box {
                padding: 1.25rem 1.5rem;
            }
        }

        .news-box h4 {
            margin-top: 0;
            margin-bottom: 0.5rem;
            color: var(--text-main);
        }

        .archive-container {
            background: #0f172a;
            border-radius: var(--radius-md);
            padding: 1.25rem;
            color: #f8fafc;
            box-shadow: inset 0 2px 4px rgba(0,0,0,0.3);
            font-size: 0.9rem;
            margin-top: 1rem;
            margin-bottom: 1.5rem;
        }

        .archive-header {
            font-weight: 700;
            color: #38bdf8;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid #334155;
            font-size: 0.95rem;
            line-height: 1.6;
        }

        .archive-list {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
            max-height: 450px;
            overflow-y: auto;
            padding-right: 0.25rem;
        }

        .archive-list::-webkit-scrollbar {
            width: 6px;
        }

        .archive-list::-webkit-scrollbar-track {
            background: #1e293b;
            border-radius: 3px;
        }

        .archive-list::-webkit-scrollbar-thumb {
            background: #475569;
            border-radius: 3px;
        }

        .archive-item {
            background: #1e293b;
            border: 1px solid #334155;
            border-radius: var(--radius-sm);
            padding: 0.875rem;
            transition: var(--transition);
        }

        .archive-item:hover {
            border-color: #64748b;
            background: #263548;
        }

        .archive-badge {
            display: inline-block;
            background: #0284c7;
            color: #fff;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 0.15rem 0.5rem;
            border-radius: 4px;
            margin-bottom: 0.35rem;
        }

        .archive-badge.level-7 {
            background: #dc2626;
        }

        .archive-badge.level-5 {
            background: #ea580c;
        }

        .archive-title {
            font-weight: 700;
            color: #f1f5f9;
            margin-bottom: 0.25rem;
            font-size: 1rem;
        }

        .archive-meta {
            font-size: 0.8rem;
            color: #94a3b8;
            margin-bottom: 0.35rem;
        }

        .archive-content-text {
            font-size: 0.85rem;
            color: #cbd5e1;
            margin-bottom: 0.35rem;
            white-space: pre-wrap;
        }

        .archive-verdict {
            font-size: 0.85rem;
            color: #38bdf8;
            border-top: 1px dashed #334155;
            padding-top: 0.35rem;
            margin-top: 0.35rem;
            white-space: pre-wrap;
        }

        .members-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: 1rem;
        }

        .member-chip {
            background: #f1f5f9;
            border: 1px solid var(--border);
            padding: 0.35rem 0.75rem;
            border-radius: 20px;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--primary);
        }

        details {
            background: #f8fafc;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 1rem;
            margin-bottom: 1rem;
            transition: var(--transition);
        }

        @media (min-width: 768px) {
            details {
                padding: 1.25rem;
            }
        }

        details[open] {
            background: #ffffff;
            border-color: #cbd5e1;
            box-shadow: var(--shadow-sm);
        }

        summary {
            font-weight: 700;
            cursor: pointer;
            color: var(--secondary);
            font-size: 1rem;
            user-select: none;
            outline: none;
        }

        details[open] summary {
            color: var(--primary);
            margin-bottom: 1rem;
            border-bottom: 1px dashed var(--border);
            padding-bottom: 0.75rem;
        }

        footer {
            text-align: center;
            padding: 2rem 1rem;
            color: var(--text-muted);
            font-size: 0.875rem;
            border-top: 1px solid var(--border);
            background: var(--surface);
            margin-top: 3rem;
        }