*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            background: #f5f7fa;
            color: #1e293b;
            line-height: 1.8;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { color: #0057b3; text-decoration: none; transition: color 0.2s; }
        a:hover { color: #ff6b00; text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; border-radius: 12px; }
        h1, h2, h3, h4 { line-height: 1.3; font-weight: 700; margin-top: 1.2em; margin-bottom: 0.6em; color: #0f172a; }
        h1 { font-size: 2.2rem; margin-top: 0.4em; }
        h2 { font-size: 1.7rem; border-left: 5px solid #ff6b00; padding-left: 16px; }
        h3 { font-size: 1.35rem; color: #1e293b; }
        h4 { font-size: 1.1rem; font-weight: 600; color: #334155; }
        p { margin-bottom: 1.2em; }
        ul, ol { margin-bottom: 1.2em; padding-left: 1.8em; }
        li { margin-bottom: 0.5em; }
        strong { color: #0f172a; font-weight: 700; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; width: 100%; }
        .site-header {
            background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%);
            color: #fff;
            padding: 14px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0,0,0,0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #fff;
            background: linear-gradient(135deg, #f59e0b, #ff6b00);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo i { font-size: 1.6rem; -webkit-text-fill-color: #f59e0b; }
        .my-logo:hover { opacity: 0.9; text-decoration: none; }
        .my-logo span { font-size: 0.85rem; font-weight: 400; color: #94a3b8; -webkit-text-fill-color: #94a3b8; display: block; letter-spacing: 0.3px; }
        .nav-wrapper { display: flex; align-items: center; gap: 6px; }
        .main-nav { display: flex; gap: 6px; flex-wrap: wrap; }
        .main-nav a {
            color: #e2e8f0;
            padding: 8px 16px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: all 0.25s;
            white-space: nowrap;
            background: rgba(255,255,255,0.06);
            border: 1px solid transparent;
        }
        .main-nav a:hover, .main-nav a.active {
            background: rgba(255,107,0,0.2);
            color: #fbbf24;
            border-color: rgba(255,107,0,0.3);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 6px 10px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover { background: rgba(255,255,255,0.1); }
        .breadcrumb-wrap {
            background: #fff;
            border-bottom: 1px solid #e2e8f0;
            padding: 10px 0;
            font-size: 0.85rem;
        }
        .breadcrumb { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
        .breadcrumb a { color: #475569; }
        .breadcrumb a:hover { color: #ff6b00; }
        .breadcrumb span { color: #94a3b8; margin: 0 4px; }
        .breadcrumb .current { color: #0f172a; font-weight: 600; }
        .main-content { flex: 1; padding: 30px 0 50px; }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .content-body { min-width: 0; }
        .sidebar { position: sticky; top: 100px; align-self: start; }
        .sidebar-card {
            background: #fff;
            border-radius: 16px;
            padding: 24px 20px;
            box-shadow: 0 4px 16px rgba(0,0,0,0.06);
            margin-bottom: 24px;
            border: 1px solid #eef2f6;
        }
        .sidebar-card h3 { font-size: 1.1rem; margin-top: 0; border-left: 3px solid #ff6b00; padding-left: 12px; }
        .sidebar-links { list-style: none; padding: 0; }
        .sidebar-links li { border-bottom: 1px solid #f1f5f9; padding: 8px 0; }
        .sidebar-links li:last-child { border-bottom: none; }
        .sidebar-links a { display: flex; align-items: center; gap: 8px; color: #1e293b; font-size: 0.92rem; }
        .sidebar-links a:hover { color: #ff6b00; text-decoration: none; }
        .sidebar-links i { color: #ff6b00; width: 18px; font-size: 0.85rem; }
        .search-form { display: flex; gap: 6px; margin-bottom: 10px; }
        .search-form input {
            flex: 1;
            padding: 10px 16px;
            border: 2px solid #e2e8f0;
            border-radius: 30px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.2s;
        }
        .search-form input:focus { border-color: #ff6b00; }
        .search-form button {
            background: #ff6b00;
            border: none;
            color: #fff;
            padding: 10px 18px;
            border-radius: 30px;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.2s;
        }
        .search-form button:hover { background: #e65a00; }
        .comment-section, .rating-section {
            background: #fff;
            border-radius: 16px;
            padding: 28px 24px;
            margin-top: 36px;
            box-shadow: 0 4px 16px rgba(0,0,0,0.05);
            border: 1px solid #eef2f6;
        }
        .comment-section h2, .rating-section h2 { margin-top: 0; border-left-color: #f59e0b; }
        .form-group { margin-bottom: 16px; }
        .form-group label { display: block; font-weight: 600; margin-bottom: 4px; color: #1e293b; font-size: 0.95rem; }
        .form-group input, .form-group textarea, .form-group select {
            width: 100%;
            padding: 10px 14px;
            border: 2px solid #e2e8f0;
            border-radius: 10px;
            font-size: 0.95rem;
            font-family: inherit;
            transition: border 0.2s;
            background: #fafcff;
        }
        .form-group input:focus, .form-group textarea:focus, .form-group select:focus { border-color: #ff6b00; outline: none; }
        .form-group textarea { resize: vertical; min-height: 100px; }
        .btn {
            background: #ff6b00;
            color: #fff;
            border: none;
            padding: 11px 30px;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn:hover { background: #e65a00; transform: translateY(-1px); }
        .btn-secondary { background: #1e293b; }
        .btn-secondary:hover { background: #0f172a; }
        .star-rating { display: flex; gap: 8px; font-size: 1.7rem; cursor: pointer; color: #d1d5db; }
        .star-rating i.active { color: #f59e0b; }
        .star-rating i:hover { color: #f59e0b; }
        .last-updated {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #eef2ff;
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 0.85rem;
            color: #1e40af;
            margin-bottom: 18px;
        }
        .toc {
            background: #fff;
            border: 1px solid #e2e8f0;
            border-radius: 16px;
            padding: 22px 24px;
            margin-bottom: 30px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.04);
        }
        .toc h3 { margin-top: 0; font-size: 1.15rem; }
        .toc ul { list-style: none; padding: 0; columns: 2; column-gap: 30px; }
        .toc li { padding: 4px 0; break-inside: avoid; }
        .toc a { color: #1e293b; display: flex; align-items: center; gap: 6px; }
        .toc a::before { content: "▸"; color: #ff6b00; font-weight: 700; }
        .toc a:hover { color: #ff6b00; text-decoration: none; }
        .image-wrap {
            margin: 28px 0;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 8px 24px rgba(0,0,0,0.08);
            background: #fff;
            padding: 8px;
        }
        .image-wrap figcaption {
            padding: 12px 16px 6px;
            font-size: 0.88rem;
            color: #64748b;
            text-align: center;
            font-style: italic;
        }
        .highlight-box {
            background: linear-gradient(135deg, #fffbeb, #fff7ed);
            border-left: 5px solid #ff6b00;
            padding: 20px 24px;
            border-radius: 12px;
            margin: 24px 0;
        }
        .highlight-box p:last-child { margin-bottom: 0; }
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 40px 0 20px;
            margin-top: 40px;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 30px; margin-bottom: 30px; }
        .footer-grid h4 { color: #f1f5f9; margin-top: 0; font-size: 1rem; border-left: 3px solid #ff6b00; padding-left: 12px; }
        .footer-grid a { color: #94a3b8; display: block; padding: 4px 0; font-size: 0.9rem; }
        .footer-grid a:hover { color: #fbbf24; text-decoration: none; }
        friend-link { display: block; margin-top: 8px; }
        friend-link a { display: inline; padding: 0; }
        friend-link a::after { content: " · "; color: #475569; }
        friend-link a:last-child::after { content: ""; }
        .copyright { border-top: 1px solid #1e293b; padding-top: 20px; text-align: center; font-size: 0.85rem; color: #64748b; }
        @media (max-width: 992px) {
            .content-grid { grid-template-columns: 1fr; }
            .sidebar { position: static; }
            .toc ul { columns: 1; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background: rgba(15,23,42,0.98);
                padding: 14px 10px;
                border-radius: 16px;
                margin-top: 10px;
                gap: 4px;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                z-index: 999;
                backdrop-filter: blur(12px);
                box-shadow: 0 20px 40px rgba(0,0,0,0.4);
            }
            .main-nav.open { display: flex; }
            .main-nav a { padding: 12px 18px; border-radius: 10px; font-size: 1rem; }
            .header-inner { position: relative; }
            h1 { font-size: 1.6rem; }
            h2 { font-size: 1.35rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 20px; }
            .last-updated { font-size: 0.78rem; }
        }
        @media (max-width: 480px) {
            .container { padding: 0 14px; }
            .my-logo { font-size: 1.4rem; }
            .search-form { flex-direction: column; }
            .search-form button { width: 100%; justify-content: center; }
            .star-rating { font-size: 1.4rem; gap: 4px; }
        }