*,
        *::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, 'Helvetica Neue', sans-serif;
            background: #f4f7fc;
            color: #1a2634;
            line-height: 1.75;
            padding: 0 1rem;
        }
        a {
            color: #0056a7;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover,
        a:focus-visible {
            color: #e53935;
            text-decoration: underline;
            outline: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: #0b1a2a;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
        }
        h1 {
            font-size: 2.4rem;
            margin-top: 0.5rem;
            letter-spacing: -0.02em;
            border-bottom: 4px solid #e53935;
            display: inline-block;
            padding-bottom: 0.25rem;
        }
        h2 {
            font-size: 1.8rem;
            border-left: 6px solid #e53935;
            padding-left: 1rem;
            margin-top: 3rem;
        }
        h3 {
            font-size: 1.4rem;
            color: #1f3a5f;
        }
        h4 {
            font-size: 1.15rem;
            color: #2c4a6e;
            font-weight: 600;
        }
        p {
            margin-bottom: 1.25rem;
            font-size: 1.05rem;
        }
        ul,
        ol {
            margin: 0 0 1.5rem 1.75rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        strong {
            color: #c62828;
            font-weight: 700;
        }
        em {
            font-style: italic;
            color: #2c4a6e;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1rem;
        }
        header {
            background: linear-gradient(145deg, #ffffff 0%, #f0f4fa 100%);
            border-radius: 0 0 24px 24px;
            padding: 1.2rem 1.8rem;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
            margin-bottom: 2rem;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            position: relative;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            background: linear-gradient(135deg, #c62828, #e53935);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .my-logo i {
            -webkit-text-fill-color: #c62828;
            font-size: 1.6rem;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
        }
        nav {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            flex-wrap: wrap;
        }
        nav a {
            padding: 0.5rem 1rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            color: #1a2634;
            transition: background 0.2s, color 0.2s;
        }
        nav a:hover,
        nav a:focus-visible {
            background: #e53935;
            color: #fff;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: #1a2634;
            cursor: pointer;
            padding: 0.25rem 0.5rem;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(229, 57, 53, 0.08);
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0.75rem 0 0.25rem;
            margin: 0 0 1.5rem 0;
            font-size: 0.9rem;
            color: #5f6c7a;
            gap: 0.4rem;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin: 0 0.6rem;
            color: #9aa6b5;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #0056a7;
        }
        .breadcrumb a:hover {
            color: #e53935;
        }
        .search-form {
            display: flex;
            max-width: 560px;
            margin: 1.8rem 0 2.5rem;
            border-radius: 60px;
            overflow: hidden;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
            background: #fff;
            border: 1px solid #dce3ed;
            transition: box-shadow 0.3s, border-color 0.3s;
        }
        .search-form:focus-within {
            box-shadow: 0 4px 24px rgba(229, 57, 53, 0.15);
            border-color: #e53935;
        }
        .search-form input[type="text"] {
            flex: 1;
            padding: 0.9rem 1.4rem;
            border: none;
            font-size: 1rem;
            background: transparent;
            outline: none;
            color: #1a2634;
        }
        .search-form input[type="text"]::placeholder {
            color: #8f9daf;
        }
        .search-form button {
            background: #e53935;
            color: #fff;
            border: none;
            padding: 0 1.6rem;
            font-size: 1.1rem;
            cursor: pointer;
            transition: background 0.2s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 600;
        }
        .search-form button:hover {
            background: #c62828;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 2.5rem;
            margin-bottom: 3rem;
        }
        .main-content {
            min-width: 0;
        }
        .sidebar {
            background: #ffffff;
            border-radius: 20px;
            padding: 1.8rem 1.5rem;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
            height: fit-content;
            position: sticky;
            top: 1.5rem;
        }
        .sidebar h3 {
            font-size: 1.3rem;
            margin-top: 0;
            border-bottom: 2px solid #eef3f9;
            padding-bottom: 0.6rem;
            margin-bottom: 1.2rem;
        }
        .sidebar ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .sidebar ul li {
            padding: 0.4rem 0;
            border-bottom: 1px solid #f0f4fa;
        }
        .sidebar ul li:last-child {
            border-bottom: none;
        }
        .sidebar ul li a {
            font-weight: 500;
            display: block;
            padding: 0.2rem 0;
        }
        .featured-image {
            margin: 2rem 0 2.5rem;
            border-radius: 16px;
            overflow: hidden;
            background: #eef3f9;
        }
        .featured-image figcaption {
            padding: 0.8rem 1.2rem;
            font-size: 0.9rem;
            color: #4a5b6f;
            background: #f8faff;
            border-top: 1px solid #e4ebf3;
        }
        .interaction-section {
            background: #ffffff;
            border-radius: 24px;
            padding: 2rem 2.2rem;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
            margin: 3rem 0 2rem;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem 2.5rem;
        }
        .interaction-section h3 {
            margin-top: 0;
            font-size: 1.3rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .interaction-section form {
            display: flex;
            flex-direction: column;
            gap: 0.9rem;
        }
        .interaction-section input,
        .interaction-section textarea,
        .interaction-section select {
            padding: 0.8rem 1rem;
            border: 1px solid #dce3ed;
            border-radius: 12px;
            font-size: 0.95rem;
            font-family: inherit;
            background: #fafcff;
            transition: border-color 0.2s, box-shadow 0.2s;
            resize: vertical;
        }
        .interaction-section input:focus,
        .interaction-section textarea:focus,
        .interaction-section select:focus {
            outline: none;
            border-color: #e53935;
            box-shadow: 0 0 0 3px rgba(229, 57, 53, 0.08);
        }
        .interaction-section textarea {
            min-height: 90px;
        }
        .interaction-section .btn-submit {
            background: #e53935;
            color: #fff;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 40px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            align-self: flex-start;
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
        }
        .interaction-section .btn-submit:hover {
            background: #c62828;
            transform: scale(1.02);
        }
        .star-rating {
            display: flex;
            gap: 0.25rem;
            font-size: 1.8rem;
            color: #dce3ed;
            cursor: pointer;
            direction: rtl;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            transition: color 0.15s;
            color: #dce3ed;
            font-size: 2rem;
            cursor: pointer;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f9a825;
        }
        footer {
            background: #0b1a2a;
            color: #cfdbe8;
            border-radius: 24px 24px 0 0;
            padding: 2.5rem 2rem 1.8rem;
            margin-top: 3rem;
        }
        footer a {
            color: #90b4d9;
        }
        footer a:hover {
            color: #ffcd7e;
            text-decoration: underline;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
            max-width: 1200px;
            margin: 0 auto;
        }
        .footer-grid h4 {
            color: #ffffff;
            margin-top: 0;
            font-size: 1.1rem;
            border-bottom: 2px solid #2a4055;
            padding-bottom: 0.5rem;
            margin-bottom: 1rem;
        }
        .friend-link {
            display: block;
            padding: 0.3rem 0;
            font-size: 0.95rem;
        }
        .friend-link i {
            margin-right: 0.5rem;
            color: #e53935;
            font-size: 0.8rem;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #1f3448;
            font-size: 0.9rem;
            color: #8fa6bf;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
        }
        .copyright strong {
            color: #ffcd7e;
        }
        .last-updated {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 0.95rem;
            color: #4a5b6f;
            background: #eef3f9;
            padding: 0.6rem 1.2rem;
            border-radius: 40px;
            margin: 1.5rem 0 2rem;
            width: fit-content;
        }
        .last-updated i {
            color: #e53935;
        }
        .schema-hidden {
            display: none;
        }
        @media (max-width: 860px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                order: 2;
            }
            .interaction-section {
                grid-template-columns: 1fr;
            }
            header {
                padding: 1rem 1.2rem;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .hamburger {
                display: block;
            }
            nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding-top: 1rem;
                gap: 0.2rem;
            }
            nav.open {
                display: flex;
            }
            nav a {
                padding: 0.7rem 1rem;
                border-radius: 12px;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.45rem;
            }
            h3 {
                font-size: 1.2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid :first-child {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 480px) {
            body {
                padding: 0 0.5rem;
            }
            header {
                padding: 0.8rem 1rem;
            }
            .my-logo {
                font-size: 1.3rem;
            }
            .search-form {
                flex-direction: column;
                border-radius: 24px;
            }
            .search-form button {
                padding: 0.7rem;
                justify-content: center;
                border-radius: 0 0 24px 24px;
            }
            .interaction-section {
                padding: 1.5rem 1.2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .breadcrumb {
                font-size: 0.8rem;
            }
        }