*,
        *::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: #f5f7fb;
            color: #1a1a2e;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        a {
            color: #0057b3;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover,
        a:focus {
            color: #ff8c00;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            color: #0b1e33;
            font-weight: 700;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .site-header {
            background: linear-gradient(135deg, #0b1e33 0%, #1a3a5c 100%);
            color: #fff;
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 100;
            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;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #ffd700;
            text-shadow: 0 2px 8px rgba(255, 215, 0, 0.3);
            transition: transform 0.2s;
        }
        .my-logo:hover {
            transform: scale(1.02);
            color: #ffed4a;
        }
        .my-logo a {
            color: inherit;
            text-decoration: none;
        }
        .my-logo small {
            font-size: 0.7rem;
            font-weight: 400;
            color: #bcccdc;
            display: block;
            letter-spacing: 0.3px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 0.3rem;
            flex-wrap: wrap;
        }
        .main-nav a {
            color: #e6edf5;
            padding: 0.5rem 0.9rem;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: background 0.25s, color 0.25s;
            white-space: nowrap;
        }
        .main-nav a:hover,
        .main-nav a:focus {
            background: rgba(255, 215, 0, 0.2);
            color: #ffd700;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #ffd700;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.2rem 0.5rem;
            transition: transform 0.2s;
        }
        .hamburger:hover {
            transform: scale(1.1);
        }
        .breadcrumb {
            background: #eef2f7;
            padding: 0.7rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #dce3ec;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.5rem;
            color: #7a8aa3;
        }
        .breadcrumb a {
            color: #0057b3;
        }
        .breadcrumb .current {
            color: #4a5a72;
            font-weight: 600;
        }
        .hero {
            background: linear-gradient(145deg, #e8edf5 0%, #d4dce8 100%);
            padding: 2.5rem 0 2rem;
            border-bottom: 1px solid #c8d2e0;
        }
        .hero h1 {
            font-size: 2.6rem;
            margin-bottom: 0.5rem;
            color: #0b1e33;
        }
        .hero .subtitle {
            font-size: 1.15rem;
            color: #2c4058;
            max-width: 780px;
        }
        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.2rem;
            margin-top: 0.8rem;
            font-size: 0.95rem;
            color: #3c5470;
        }
        .hero-meta i {
            margin-right: 0.3rem;
            color: #ff8c00;
        }
        .search-section {
            background: #fff;
            padding: 1.2rem 0;
            border-bottom: 1px solid #dce3ec;
        }
        .search-form {
            display: flex;
            gap: 0.6rem;
            max-width: 640px;
            margin: 0 auto;
            flex-wrap: wrap;
        }
        .search-form input {
            flex: 1;
            padding: 0.7rem 1.2rem;
            border: 2px solid #d0d9e6;
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            transition: border 0.25s, box-shadow 0.25s;
            min-width: 160px;
        }
        .search-form input:focus {
            border-color: #ff8c00;
            box-shadow: 0 0 0 4px rgba(255, 140, 0, 0.15);
        }
        .search-form button {
            background: #0b1e33;
            color: #fff;
            border: none;
            border-radius: 40px;
            padding: 0.7rem 2rem;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-form button:hover {
            background: #1a3a5c;
            transform: translateY(-2px);
        }
        .content-wrap {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2.5rem 0;
        }
        .main-article {
            background: #fff;
            border-radius: 20px;
            padding: 2rem 2.2rem;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 16px;
            padding: 1.5rem;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
            margin-bottom: 1.5rem;
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-bottom: 0.8rem;
            border-bottom: 2px solid #ffd700;
            padding-bottom: 0.4rem;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
        }
        .sidebar-card li {
            padding: 0.4rem 0;
            border-bottom: 1px solid #f0f3f8;
        }
        .sidebar-card li a {
            font-weight: 500;
        }
        .main-article h2 {
            font-size: 1.9rem;
            margin: 2.2rem 0 1rem;
            color: #0b1e33;
            border-left: 5px solid #ffd700;
            padding-left: 1rem;
        }
        .main-article h3 {
            font-size: 1.4rem;
            margin: 1.8rem 0 0.7rem;
            color: #1a3a5c;
        }
        .main-article h4 {
            font-size: 1.15rem;
            margin: 1.2rem 0 0.5rem;
            color: #2c4a6e;
        }
        .main-article p {
            margin-bottom: 1.1rem;
            color: #2c3e50;
        }
        .main-article .feature-img {
            margin: 1.8rem 0;
            border-radius: 16px;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
        }
        .highlight-box {
            background: #f0f6ff;
            border-left: 5px solid #ff8c00;
            padding: 1.2rem 1.8rem;
            border-radius: 0 12px 12px 0;
            margin: 1.5rem 0;
        }
        .highlight-box strong {
            color: #0b1e33;
        }
        .data-table-wrap {
            overflow-x: auto;
            margin: 1.5rem 0;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
        }
        .data-table th {
            background: #0b1e33;
            color: #fff;
            padding: 0.7rem 1rem;
            text-align: left;
        }
        .data-table td {
            padding: 0.6rem 1rem;
            border-bottom: 1px solid #e0e6ef;
        }
        .data-table tr:nth-child(even) {
            background: #f8faff;
        }
        .data-table tr:hover {
            background: #edf3ff;
        }
        .btn-link {
            display: inline-block;
            background: #ffd700;
            color: #0b1e33;
            padding: 0.4rem 1.2rem;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: background 0.2s, transform 0.15s;
        }
        .btn-link:hover {
            background: #ffed4a;
            transform: translateY(-2px);
            text-decoration: none;
        }
        .emoji-big {
            font-size: 1.3rem;
            margin-right: 0.3rem;
        }
        .interaction-area {
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 2px solid #e8edf5;
        }
        .rating-section {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 1.5rem;
            margin-bottom: 2rem;
            background: #fafcff;
            padding: 1.2rem 1.8rem;
            border-radius: 16px;
        }
        .rating-stars {
            display: flex;
            gap: 0.4rem;
            font-size: 1.8rem;
            color: #d0d9e6;
            cursor: pointer;
            transition: color 0.2s;
        }
        .rating-stars i.active {
            color: #ffb800;
        }
        .rating-stars i:hover,
        .rating-stars i.hover {
            color: #ffb800;
        }
        .rating-form button {
            background: #0b1e33;
            color: #fff;
            border: none;
            padding: 0.5rem 1.8rem;
            border-radius: 30px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s;
        }
        .rating-form button:hover {
            background: #1a3a5c;
        }
        .comment-form textarea {
            width: 100%;
            padding: 0.9rem 1.2rem;
            border: 2px solid #d0d9e6;
            border-radius: 12px;
            font-size: 1rem;
            resize: vertical;
            min-height: 100px;
            font-family: inherit;
            transition: border 0.25s;
        }
        .comment-form textarea:focus {
            border-color: #ff8c00;
            outline: none;
        }
        .comment-form input[type="text"] {
            width: 100%;
            padding: 0.7rem 1.2rem;
            border: 2px solid #d0d9e6;
            border-radius: 12px;
            font-size: 1rem;
            margin-bottom: 0.8rem;
            transition: border 0.25s;
        }
        .comment-form input[type="text"]:focus {
            border-color: #ff8c00;
            outline: none;
        }
        .comment-form .btn-submit {
            background: #0b1e33;
            color: #fff;
            border: none;
            padding: 0.7rem 2.5rem;
            border-radius: 30px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
        }
        .comment-form .btn-submit:hover {
            background: #1a3a5c;
            transform: translateY(-2px);
        }
        .site-footer {
            background: #0b1e33;
            color: #ccdbe8;
            padding: 2.5rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .site-footer h4 {
            color: #ffd700;
            margin-bottom: 1rem;
            font-size: 1.1rem;
        }
        .site-footer a {
            color: #b0c7dd;
        }
        .site-footer a:hover {
            color: #ffd700;
        }
        friend-link {
            display: block;
            margin: 0.8rem 0;
        }
        friend-link a {
            display: inline-block;
            margin-right: 1.2rem;
            padding: 0.3rem 0;
        }
        .copyright {
            border-top: 1px solid #1e3a5a;
            padding-top: 1.2rem;
            text-align: center;
            font-size: 0.9rem;
            color: #8ca3bd;
        }
        @media (max-width: 992px) {
            .content-wrap {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 1.2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding-top: 1rem;
                gap: 0.2rem;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 0.7rem 1rem;
                border-radius: 8px;
                text-align: center;
            }
            .hero h1 {
                font-size: 1.9rem;
            }
            .main-article {
                padding: 1.2rem 1rem;
            }
            .main-article h2 {
                font-size: 1.5rem;
            }
            .main-article h3 {
                font-size: 1.2rem;
            }
            .sidebar {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .rating-section {
                flex-direction: column;
                align-items: flex-start;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                justify-content: center;
            }
        }
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 1.5rem;
            }
            .my-logo {
                font-size: 1.3rem;
            }
            .header-inner {
                gap: 0.5rem;
            }
        }
        .skip-link {
            position: absolute;
            top: -100px;
            left: 0;
            background: #ffd700;
            color: #0b1e33;
            padding: 0.6rem 1.5rem;
            font-weight: 700;
            z-index: 999;
            transition: top 0.3s;
        }
        .skip-link:focus {
            top: 0;
        }