*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, sans-serif;
            background: #f5f7fa;
            color: #1e2a3a;
            line-height: 1.7;
            font-size: 16px;
        }
        a {
            color: #0057b3;
            text-decoration: none;
            transition: color 0.25s;
        }
        a:hover,
        a:focus-visible {
            color: #ff6b35;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 650;
            line-height: 1.3;
            margin-top: 1.6em;
            margin-bottom: 0.5em;
            color: #0b1a2a;
        }
        h1 {
            font-size: 2.4rem;
            margin-top: 0.4em;
        }
        h2 {
            font-size: 1.9rem;
            border-bottom: 3px solid #ff6b35;
            padding-bottom: 0.2em;
        }
        h3 {
            font-size: 1.5rem;
            color: #1a3a5c;
        }
        h4 {
            font-size: 1.2rem;
            color: #2a4a6c;
        }
        p {
            margin-bottom: 1.2em;
        }
        ul,
        ol {
            margin: 0.8em 0 1.2em 2em;
        }
        li {
            margin-bottom: 0.3em;
        }
        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(145deg, #0b1a2a 0%, #1a3a5c 100%);
            color: #fff;
            padding: 0.5rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 0.4rem 0;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #ffd700, #ff6b35);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            transition: transform 0.25s;
            display: inline-block;
        }
        .my-logo:hover {
            transform: scale(1.03);
            text-decoration: none;
        }
        .my-logo i {
            -webkit-text-fill-color: #ff6b35;
            margin-right: 6px;
        }
        .nav-toggle {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: #fff;
            cursor: pointer;
            padding: 4px 12px;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.12);
        }
        .nav-menu {
            display: flex;
            gap: 1.2rem;
            align-items: center;
            flex-wrap: wrap;
        }
        .nav-menu a {
            color: #e0e9f5;
            font-weight: 500;
            padding: 0.3rem 0.6rem;
            border-radius: 6px;
            transition: background 0.2s, color 0.2s;
            font-size: 0.95rem;
        }
        .nav-menu a:hover {
            background: rgba(255, 107, 53, 0.25);
            color: #ffd700;
            text-decoration: none;
        }
        .breadcrumb {
            background: #e9edf2;
            padding: 0.6rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #d0d8e0;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 0.8rem;
            margin: 0;
        }
        .breadcrumb ol li+li::before {
            content: "›";
            color: #888;
            margin-right: 0.8rem;
        }
        .breadcrumb a {
            color: #0057b3;
        }
        .breadcrumb .current {
            color: #1a3a5c;
            font-weight: 600;
        }
        .search-section {
            background: #fff;
            padding: 1.2rem 0;
            border-bottom: 1px solid #dde3ea;
        }
        .search-form {
            display: flex;
            gap: 0.6rem;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-form input {
            flex: 1;
            padding: 0.7rem 1.2rem;
            border: 2px solid #ccd7e4;
            border-radius: 50px;
            font-size: 1rem;
            transition: border 0.25s;
        }
        .search-form input:focus {
            border-color: #ff6b35;
            outline: none;
        }
        .search-form button {
            background: #ff6b35;
            border: none;
            color: #fff;
            padding: 0.7rem 1.6rem;
            border-radius: 50px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
        }
        .search-form button:hover {
            background: #e55a2b;
            transform: scale(1.02);
        }
        .hero {
            background: linear-gradient(135deg, #0b1a2a 0%, #1f4a6e 100%);
            color: #fff;
            padding: 3rem 0 2.5rem;
            text-align: center;
        }
        .hero h1 {
            font-size: 2.8rem;
            color: #ffd700;
            margin-top: 0;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 760px;
            margin: 0.8rem auto 1.2rem;
            opacity: 0.92;
        }
        .hero .last-updated {
            font-size: 0.95rem;
            opacity: 0.7;
            display: inline-block;
            background: rgba(255, 255, 255, 0.08);
            padding: 0.3rem 1.2rem;
            border-radius: 50px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
            padding: 2.5rem 0;
        }
        .main-article {
            background: #fff;
            border-radius: 20px;
            padding: 2rem 2.2rem;
            box-shadow: 0 6px 30px rgba(0, 0, 0, 0.04);
        }
        .sidebar {
            background: #fff;
            border-radius: 20px;
            padding: 1.6rem 1.8rem;
            box-shadow: 0 6px 30px rgba(0, 0, 0, 0.04);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        .sidebar h3 {
            font-size: 1.3rem;
            margin-top: 0;
            border-bottom: 2px solid #ff6b35;
            padding-bottom: 0.4rem;
        }
        .sidebar ul {
            list-style: none;
            margin: 0.8em 0 0;
        }
        .sidebar ul li {
            padding: 0.4rem 0;
            border-bottom: 1px solid #ecf0f5;
        }
        .sidebar ul li a {
            font-weight: 500;
        }
        .feature-image {
            margin: 1.8rem 0 2.2rem;
            border-radius: 18px;
            overflow: hidden;
            background: #e9edf2;
            text-align: center;
        }
        .feature-image img {
            width: 100%;
            max-height: 460px;
            object-fit: cover;
        }
        .feature-image figcaption {
            padding: 0.6rem 1rem;
            font-size: 0.9rem;
            color: #4a5a6a;
            background: #f0f4f9;
        }
        .feedback-section {
            margin-top: 2.8rem;
            padding-top: 1.8rem;
            border-top: 2px dashed #ccd7e4;
        }
        .comment-box,
        .rating-box {
            background: #f7f9fc;
            border-radius: 16px;
            padding: 1.4rem 1.8rem;
            margin-bottom: 1.6rem;
        }
        .comment-box h3,
        .rating-box h3 {
            margin-top: 0;
            font-size: 1.3rem;
        }
        .comment-box form,
        .rating-box form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .comment-box textarea,
        .comment-box input {
            padding: 0.7rem 1rem;
            border: 2px solid #ccd7e4;
            border-radius: 12px;
            font-size: 0.95rem;
            resize: vertical;
            font-family: inherit;
        }
        .comment-box textarea:focus,
        .comment-box input:focus {
            border-color: #ff6b35;
            outline: none;
        }
        .rating-box select {
            padding: 0.6rem 1rem;
            border: 2px solid #ccd7e4;
            border-radius: 12px;
            font-size: 1rem;
            background: #fff;
            max-width: 200px;
        }
        .btn {
            background: #0057b3;
            color: #fff;
            border: none;
            padding: 0.7rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            align-self: flex-start;
            font-size: 0.95rem;
        }
        .btn:hover {
            background: #003f8a;
            transform: scale(1.02);
        }
        .btn-orange {
            background: #ff6b35;
        }
        .btn-orange:hover {
            background: #e55a2b;
        }
        .site-footer {
            background: #0b1a2a;
            color: #b8c8da;
            padding: 2.5rem 0 1.2rem;
            margin-top: 2rem;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
        }
        .site-footer h4 {
            color: #ffd700;
            margin-top: 0;
            font-size: 1.1rem;
        }
        .site-footer a {
            color: #b8c8da;
        }
        .site-footer a:hover {
            color: #ffd700;
        }
        .friend-link {
            display: block;
            background: #112b3f;
            padding: 1.2rem 1.8rem;
            border-radius: 14px;
            margin: 0.8rem 0 1.2rem;
        }
        .friend-link a {
            display: inline-block;
            margin: 0.3rem 0.8rem 0.3rem 0;
            padding: 0.2rem 0.8rem;
            background: rgba(255, 215, 0, 0.08);
            border-radius: 50px;
            font-size: 0.9rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.4rem;
            border-top: 1px solid #1f3a52;
            margin-top: 1.4rem;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                order: 2;
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                padding: 1rem 0 0.4rem;
                gap: 0.4rem;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 0.5rem 0.8rem;
                width: 100%;
                border-radius: 8px;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .main-article {
                padding: 1.2rem 1rem;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.25rem;
            }
            .my-logo {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 480px) {
            .header-inner {
                padding: 0.2rem 0;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                width: 100%;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            .feature-image img {
                max-height: 220px;
            }
        }
        .highlight {
            background: linear-gradient(120deg, #ffd70055, #ff6b3522);
            padding: 0.1rem 0.4rem;
            border-radius: 6px;
            font-weight: 600;
        }
        .emoji-big {
            font-size: 1.8rem;
            line-height: 1;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 1rem;
            margin: 1.4rem 0;
        }
        .stat-card {
            background: #f0f4f9;
            border-radius: 16px;
            padding: 1rem 1.2rem;
            text-align: center;
            border-left: 4px solid #ff6b35;
        }
        .stat-card .num {
            font-size: 2rem;
            font-weight: 800;
            color: #0b1a2a;
        }
        .stat-card .label {
            font-size: 0.9rem;
            color: #4a5a6a;
        }
        .tip-box {
            background: #eef5ff;
            border-left: 5px solid #0057b3;
            padding: 1rem 1.4rem;
            border-radius: 12px;
            margin: 1.2rem 0;
        }
        .tip-box strong {
            color: #0057b3;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.4rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
        }
        th,
        td {
            padding: 0.6rem 1rem;
            border: 1px solid #d0d8e0;
            text-align: left;
        }
        th {
            background: #1a3a5c;
            color: #fff;
        }
        tr:nth-child(even) {
            background: #f7f9fc;
        }