*,
        *::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, 'Helvetica Neue', sans-serif;
            line-height: 1.75;
            color: #1e1e2a;
            background: #f8f9fc;
            padding: 0 1rem;
            max-width: 1280px;
            margin: 0 auto;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        a {
            color: #1a5e8a;
            text-decoration: underline;
            text-underline-offset: 2px;
            transition: color 0.2s ease;
        }
        a:hover,
        a:focus {
            color: #0d3b5c;
            text-decoration: none;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin: 1rem 0;
        }
        li {
            margin-bottom: 0.4rem;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin: 1.2rem 0 0.8rem;
            color: #0b1e2e;
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: 2rem;
            font-weight: 700;
            margin: 2.4rem 0 1rem;
            color: #123b54;
            border-bottom: 3px solid #cfdfe9;
            padding-bottom: 0.4rem;
        }
        h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin: 1.8rem 0 0.8rem;
            color: #1e4d6b;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
            margin: 1.2rem 0 0.5rem;
            color: #2c5f7e;
        }
        p {
            margin: 0.9rem 0;
            font-size: 1.05rem;
        }
        .text-small {
            font-size: 0.92rem;
            color: #4a5a6a;
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 1.2rem 0;
            border-bottom: 1px solid #dce4ec;
            background: #fff;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
            border-radius: 0 0 16px 16px;
            margin-bottom: 1rem;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            background: linear-gradient(145deg, #1a4f6e, #0f2f44);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-decoration: none;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .my-logo i {
            font-size: 1.8rem;
            color: #1a5e8a;
        }
        .my-logo:hover {
            opacity: 0.85;
        }
        .nav-primary {
            display: flex;
            align-items: center;
            gap: 0.2rem;
            flex-wrap: wrap;
        }
        .nav-primary a {
            padding: 0.5rem 1rem;
            border-radius: 30px;
            font-weight: 500;
            font-size: 0.95rem;
            color: #1e3b4e;
            text-decoration: none;
            transition: background 0.2s;
        }
        .nav-primary a:hover,
        .nav-primary a:focus {
            background: #e6edf3;
            color: #0b2a3b;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: #1e3b4e;
            cursor: pointer;
            padding: 0.2rem 0.6rem;
            border-radius: 8px;
        }
        .nav-toggle:hover {
            background: #eef3f7;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.3rem 0.6rem;
            font-size: 0.9rem;
            padding: 0.6rem 0 0.2rem;
            color: #4e6a7c;
            background: #fff;
            border-radius: 12px;
            margin: 0.2rem 0 0.8rem;
        }
        .breadcrumb a {
            color: #1a5e8a;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb .sep {
            color: #8aa0b0;
        }
        .search-section {
            background: #ffffff;
            padding: 1.4rem 1.8rem;
            border-radius: 20px;
            box-shadow: 0 4px 18px rgba(0, 20, 30, 0.06);
            margin: 1.8rem 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.8rem;
        }
        .search-section label {
            font-weight: 600;
            color: #1a3b4e;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .search-section form {
            display: flex;
            flex: 1;
            gap: 0.5rem;
            flex-wrap: wrap;
            min-width: 200px;
        }
        .search-section input[type="search"] {
            flex: 1;
            padding: 0.7rem 1.2rem;
            border: 2px solid #dce4ec;
            border-radius: 40px;
            font-size: 1rem;
            background: #f5f8fb;
            transition: border 0.2s, box-shadow 0.2s;
            min-width: 140px;
        }
        .search-section input[type="search"]:focus {
            outline: none;
            border-color: #1a5e8a;
            box-shadow: 0 0 0 4px rgba(26, 94, 138, 0.12);
            background: #fff;
        }
        .search-section button {
            padding: 0.7rem 1.8rem;
            border: none;
            border-radius: 40px;
            background: #1a5e8a;
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .search-section button:hover {
            background: #0f4162;
            transform: scale(1.02);
        }
        .search-section button:active {
            transform: scale(0.97);
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.2rem;
            margin: 1.5rem 0;
        }
        .content-primary {
            background: #fff;
            padding: 2rem 2.2rem;
            border-radius: 24px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
        }
        .sidebar {
            background: #fff;
            padding: 1.8rem 1.6rem;
            border-radius: 24px;
            box-shadow: 0 4px 20px 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 #e6edf3;
            padding-bottom: 0.5rem;
        }
        .sidebar ul {
            list-style: none;
            padding-left: 0;
        }
        .sidebar ul li {
            padding: 0.3rem 0;
        }
        .sidebar ul li a {
            text-decoration: none;
            font-weight: 500;
        }
        .sidebar ul li a:hover {
            text-decoration: underline;
        }
        .feature-img {
            border-radius: 18px;
            margin: 1.8rem 0;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
            width: 100%;
            max-height: 460px;
            object-fit: cover;
            background: #eef3f7;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.6rem;
            margin: 2.2rem 0 1.2rem;
        }
        .card-feedback {
            background: #f4f8fc;
            padding: 1.6rem 1.8rem;
            border-radius: 20px;
            border: 1px solid #e0e9f0;
        }
        .card-feedback h3 {
            margin-top: 0;
            font-size: 1.3rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .card-feedback form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
            margin-top: 0.6rem;
        }
        .card-feedback textarea,
        .card-feedback input[type="text"],
        .card-feedback input[type="number"],
        .card-feedback select {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 2px solid #dce4ec;
            border-radius: 14px;
            font-size: 0.95rem;
            background: #fff;
            transition: border 0.2s;
        }
        .card-feedback textarea:focus,
        .card-feedback input:focus,
        .card-feedback select:focus {
            outline: none;
            border-color: #1a5e8a;
        }
        .card-feedback textarea {
            min-height: 80px;
            resize: vertical;
        }
        .card-feedback .btn-submit {
            padding: 0.7rem 1.8rem;
            border: none;
            border-radius: 40px;
            background: #1a5e8a;
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s;
            align-self: flex-start;
        }
        .card-feedback .btn-submit:hover {
            background: #0f4162;
        }
        .star-rating {
            display: flex;
            gap: 0.4rem;
            font-size: 1.6rem;
            color: #f5b342;
            cursor: pointer;
        }
        .star-rating i {
            transition: transform 0.15s;
        }
        .star-rating i:hover {
            transform: scale(1.2);
        }
        friend-link {
            display: block;
            padding: 1.2rem 1.6rem;
            background: #f0f5fa;
            border-radius: 18px;
            margin: 2rem 0 0.8rem;
            font-weight: 500;
            border: 1px solid #dce4ec;
        }
        friend-link a {
            display: inline-block;
            margin: 0.2rem 1.2rem 0.2rem 0;
            padding: 0.2rem 0;
        }
        .site-footer {
            background: #0f1f2b;
            color: #cbdae3;
            padding: 2.4rem 2rem 1.6rem;
            border-radius: 28px 28px 20px 20px;
            margin: 2.8rem 0 1.6rem;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 1.2rem;
        }
        .site-footer .copyright {
            font-size: 0.92rem;
            opacity: 0.85;
        }
        .site-footer a {
            color: #9dbfd6;
            text-decoration: none;
        }
        .site-footer a:hover {
            color: #d4e8f2;
            text-decoration: underline;
        }
        @media (max-width: 920px) {
            .main-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                margin-top: 1.2rem;
            }
            .feedback-grid {
                grid-template-columns: 1fr;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            .content-primary {
                padding: 1.4rem 1.2rem;
            }
            .site-header {
                padding: 0.8rem 0.6rem;
            }
        }
        @media (max-width: 680px) {
            .nav-primary {
                display: none;
                width: 100%;
                flex-direction: column;
                background: #fff;
                padding: 1rem 0 0.6rem;
                border-top: 1px solid #e0e9f0;
                margin-top: 0.6rem;
            }
            .nav-primary.open {
                display: flex;
            }
            .nav-toggle {
                display: block;
            }
            .search-section {
                padding: 1rem 1.2rem;
            }
            .search-section form {
                flex-direction: column;
            }
            .site-footer {
                flex-direction: column;
                text-align: center;
                padding: 1.8rem 1.2rem;
            }
            h1 {
                font-size: 1.7rem;
            }
            .my-logo {
                font-size: 1.3rem;
            }
            .breadcrumb {
                font-size: 0.8rem;
            }
            .card-feedback {
                padding: 1.2rem;
            }
        }
        @media (max-width: 480px) {
            body {
                padding: 0 0.5rem;
            }
            .content-primary {
                padding: 1rem 0.8rem;
                border-radius: 16px;
            }
            .sidebar {
                padding: 1.2rem 1rem;
            }
            .feature-img {
                max-height: 220px;
            }
        }
        .badge {
            display: inline-block;
            background: #dce9f2;
            padding: 0.2rem 1rem;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            color: #1a4f6e;
        }
        .highlight {
            background: #fcf2db;
            padding: 0.1rem 0.4rem;
            border-radius: 6px;
            font-weight: 600;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.4rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
            background: #f8fafc;
            border-radius: 16px;
            overflow: hidden;
        }
        th,
        td {
            padding: 0.7rem 1rem;
            text-align: left;
            border-bottom: 1px solid #e0e9f0;
        }
        th {
            background: #e6edf3;
            font-weight: 700;
            color: #0f2f44;
        }
        tr:last-child td {
            border-bottom: none;
        }
        .last-updated {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.9rem;
            color: #4e6a7c;
            background: #f0f5fa;
            padding: 0.5rem 1.2rem;
            border-radius: 40px;
            margin: 0.4rem 0 1.2rem;
            width: fit-content;
        }
        .emoji-big {
            font-size: 1.4rem;
            margin-right: 0.2rem;
        }
        .link-list-inline {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem 1.4rem;
            padding: 0.6rem 0;
        }
        .link-list-inline a {
            font-weight: 500;
        }