*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            background: #f8f9fc;
            color: #1e293b;
            line-height: 1.7;
            padding: 0 1rem 2rem;
        }
        a {
            color: #1d4ed8;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #0f3a9e;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        .container {
            max-width: 1120px;
            margin: 0 auto;
            background: #ffffff;
            border-radius: 28px;
            padding: 1.8rem 2rem 2.5rem;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.2;
            margin: 0.6rem 0 0.8rem;
            color: #0b1e33;
        }
        h2 {
            font-size: 1.9rem;
            font-weight: 700;
            margin: 2.2rem 0 0.9rem;
            padding-bottom: 0.3rem;
            border-bottom: 3px solid #e2e8f0;
            color: #0f2a44;
        }
        h3 {
            font-size: 1.45rem;
            font-weight: 600;
            margin: 1.8rem 0 0.6rem;
            color: #1e3a5f;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
            margin: 1.2rem 0 0.4rem;
            color: #2c4a6e;
        }
        p {
            margin-bottom: 1.1rem;
        }
        .last-updated {
            font-size: 0.9rem;
            color: #6b7280;
            margin-bottom: 1.8rem;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            border-left: 4px solid #3b82f6;
            padding-left: 1rem;
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 0.4rem 0 1rem;
            border-bottom: 2px solid #eef2f6;
            margin-bottom: 0.6rem;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            background: linear-gradient(135deg, #1e40af, #2563eb);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.03em;
            display: inline-block;
        }
        .my-logo small {
            font-size: 1rem;
            font-weight: 400;
            -webkit-text-fill-color: #6b7280;
            color: #6b7280;
            margin-left: 0.3rem;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 1.2rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .nav-list a {
            font-weight: 500;
            padding: 0.3rem 0;
            color: #1e293b;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s, color 0.2s;
        }
        .nav-list a:hover {
            color: #1d4ed8;
            border-bottom-color: #1d4ed8;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: #1e293b;
            cursor: pointer;
            padding: 0.2rem 0.4rem;
        }
        #nav-toggle {
            display: none;
        }
        #nav-toggle:checked~.nav-list {
            display: flex;
            flex-direction: column;
            width: 100%;
            background: #ffffff;
            padding: 1rem 0 0.8rem;
            border-top: 1px solid #e2e8f0;
        }
        #nav-toggle:checked~.nav-list li {
            width: 100%;
            text-align: center;
        }
        .breadcrumb {
            font-size: 0.85rem;
            padding: 0.6rem 0 0.2rem;
            color: #6b7280;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
        }
        .breadcrumb a {
            color: #3b82f6;
        }
        .breadcrumb i {
            font-size: 0.6rem;
            color: #9ca3af;
        }
        .hero-img {
            margin: 1.8rem 0 2rem;
            border-radius: 18px;
            box-shadow: 0 4px 18px rgba(0, 0, 0, 0.06);
        }
        .search-form {
            display: flex;
            max-width: 480px;
            margin: 1.2rem 0 1.8rem;
            border-radius: 60px;
            overflow: hidden;
            border: 1px solid #d1d9e6;
            background: #f9fafb;
            transition: box-shadow 0.2s;
        }
        .search-form:focus-within {
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
            border-color: #3b82f6;
        }
        .search-form input {
            flex: 1;
            border: none;
            padding: 0.75rem 1.2rem;
            font-size: 1rem;
            background: transparent;
            outline: none;
        }
        .search-form button {
            background: #1d4ed8;
            color: #fff;
            border: none;
            padding: 0.75rem 1.5rem;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .search-form button:hover {
            background: #1e40af;
        }
        .interactive-area {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            margin: 2.4rem 0;
            padding: 1.8rem 0;
            border-top: 2px solid #eef2f6;
            border-bottom: 2px solid #eef2f6;
        }
        .rate-box,
        .comment-box {
            flex: 1 1 260px;
        }
        .rate-box h3,
        .comment-box h3 {
            margin-top: 0;
            font-size: 1.2rem;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.2rem;
            margin: 0.5rem 0 0.8rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.8rem;
            color: #d1d5db;
            cursor: pointer;
            transition: color 0.15s;
        }
        .star-rating input:checked~label,
        .star-rating label:hover,
        .star-rating label:hover~label {
            color: #f59e0b;
        }
        .rate-btn {
            background: #1d4ed8;
            color: #fff;
            border: none;
            padding: 0.5rem 1.4rem;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
        }
        .rate-btn:hover {
            background: #1e40af;
        }
        .comment-box textarea {
            width: 100%;
            padding: 0.7rem;
            border: 1px solid #d1d9e6;
            border-radius: 12px;
            font-size: 0.95rem;
            resize: vertical;
            min-height: 80px;
            font-family: inherit;
        }
        .comment-box textarea:focus {
            outline: none;
            border-color: #3b82f6;
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
        }
        .comment-box input[type="submit"],
        .comment-box button {
            margin-top: 0.5rem;
            background: #1d4ed8;
            color: #fff;
            border: none;
            padding: 0.5rem 1.4rem;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
        }
        .comment-box button:hover {
            background: #1e40af;
        }
        .link-cluster {
            background: #f1f5f9;
            padding: 1.2rem 1.6rem;
            border-radius: 16px;
            margin: 1.4rem 0;
        }
        .link-cluster ul {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 1.2rem;
            list-style: none;
        }
        .link-cluster a {
            font-weight: 500;
        }
        friend-link {
            display: block;
            padding: 1.4rem 0 0.6rem;
            border-top: 2px solid #eef2f6;
            margin-top: 2rem;
        }
        friend-link ul {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem 1.6rem;
            list-style: none;
            margin-top: 0.5rem;
        }
        friend-link a {
            font-weight: 500;
            color: #1e293b;
        }
        friend-link a:hover {
            color: #1d4ed8;
        }
        .site-footer {
            margin-top: 1.2rem;
            padding-top: 0.6rem;
            font-size: 0.85rem;
            color: #6b7280;
            text-align: center;
        }
        @media (max-width: 768px) {
            .container {
                padding: 1.2rem 1rem 1.8rem;
            }
            h1 {
                font-size: 1.9rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .nav-list {
                display: none;
                width: 100%;
            }
            .hamburger {
                display: inline-block;
            }
            #nav-toggle:checked~.nav-list {
                display: flex;
            }
            .site-header {
                align-items: center;
            }
            .breadcrumb {
                font-size: 0.75rem;
            }
            .interactive-area {
                flex-direction: column;
                gap: 1.4rem;
            }
            .search-form {
                max-width: 100%;
            }
            .my-logo {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0.8rem 0.8rem 1.2rem;
            }
            h1 {
                font-size: 1.6rem;
            }
            h2 {
                font-size: 1.3rem;
            }
            .nav-list a {
                font-size: 0.95rem;
            }
        }
        h2,
        h3,
        h4 {
            scroll-margin-top: 1.2rem;
        }
        .author-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: #eef2f6;
            padding: 0.2rem 1rem 0.2rem 0.6rem;
            border-radius: 40px;
            font-size: 0.85rem;
            margin: 0.2rem 0 0.6rem;
        }
        .author-badge i {
            color: #1d4ed8;
        }