*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: #f0f4f8;
            color: #1a2a3a;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #1e6f9f;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover,
        a:focus {
            color: #0d3b5c;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            margin-top: 1.8rem;
            margin-bottom: 0.75rem;
            font-weight: 700;
            color: #0b2a3e;
        }
        h1 {
            font-size: 2.4rem;
            margin-top: 0.5rem;
        }
        h2 {
            font-size: 1.8rem;
            border-bottom: 3px solid #2d8fcf;
            padding-bottom: 0.35rem;
        }
        h3 {
            font-size: 1.4rem;
        }
        h4 {
            font-size: 1.15rem;
            font-weight: 600;
        }
        p {
            margin-bottom: 1.2rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }
        .site-header {
            background: linear-gradient(135deg, #0b2a3e 0%, #1a4a6e 100%);
            color: #fff;
            padding: 0.6rem 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;
            gap: 0.5rem 1rem;
        }
        .my-logo {
            font-size: 1.7rem;
            font-weight: 800;
            color: #fff;
            text-decoration: none;
            letter-spacing: -0.5px;
            background: rgba(255, 255, 255, 0.08);
            padding: 0.2rem 1rem 0.2rem 0.8rem;
            border-radius: 40px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .my-logo i {
            color: #facc15;
            font-size: 1.5rem;
        }
        .my-logo:hover {
            background: rgba(255, 255, 255, 0.18);
            transform: scale(1.02);
            text-decoration: none;
        }
        .my-logo span {
            font-weight: 300;
            color: #bbddf5;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 0.3rem;
            flex-wrap: wrap;
        }
        .main-nav a {
            color: #e8f0f8;
            padding: 0.4rem 0.9rem;
            border-radius: 30px;
            font-size: 0.92rem;
            font-weight: 500;
            transition: all 0.25s ease;
            white-space: nowrap;
            border: 1px solid transparent;
        }
        .main-nav a:hover,
        .main-nav a:focus {
            background: rgba(255, 255, 255, 0.15);
            border-color: rgba(255, 255, 255, 0.25);
            text-decoration: none;
            color: #fff;
        }
        .main-nav a.active {
            background: rgba(255, 255, 255, 0.18);
            border-color: #facc15;
            color: #facc15;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.2rem 0.5rem;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.15);
        }
        .nav-mobile {
            display: none;
            width: 100%;
            flex-direction: column;
            gap: 0.3rem;
            padding: 0.8rem 0 0.4rem;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            margin-top: 0.5rem;
        }
        .nav-mobile a {
            color: #e8f0f8;
            padding: 0.5rem 0.8rem;
            border-radius: 10px;
            font-size: 0.95rem;
            transition: background 0.2s;
        }
        .nav-mobile a:hover {
            background: rgba(255, 255, 255, 0.12);
            text-decoration: none;
        }
        .breadcrumb {
            background: #e6edf4;
            padding: 0.5rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #d0dce8;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #6a7f94;
            font-weight: 600;
        }
        .breadcrumb a {
            color: #1e6f9f;
        }
        .breadcrumb .current {
            color: #3a5a7a;
            font-weight: 600;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 2.5rem;
            padding: 2.5rem 0;
        }
        @media (max-width: 900px) {
            .main-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .sidebar {
                order: 2;
            }
        }
        .sidebar {
            position: relative;
        }
        .sidebar-inner {
            background: #fff;
            border-radius: 20px;
            padding: 1.8rem 1.5rem;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
            border: 1px solid #e2edf5;
            position: sticky;
            top: 90px;
        }
        .sidebar h3 {
            font-size: 1.2rem;
            margin-top: 0;
            margin-bottom: 1rem;
            color: #0b2a3e;
            border-left: 4px solid #2d8fcf;
            padding-left: 0.8rem;
        }
        .side-links {
            list-style: none;
            padding: 0;
            margin: 0 0 1.8rem;
        }
        .side-links li {
            margin-bottom: 0.3rem;
        }
        .side-links a {
            display: block;
            padding: 0.5rem 0.8rem;
            border-radius: 10px;
            background: #f6faff;
            border-left: 3px solid transparent;
            transition: all 0.2s ease;
            font-size: 0.92rem;
        }
        .side-links a:hover {
            background: #e6f0fa;
            border-left-color: #2d8fcf;
            text-decoration: none;
            padding-left: 1.2rem;
        }
        .content-area {
            background: #fff;
            border-radius: 24px;
            padding: 2.5rem 2.8rem;
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.05);
            border: 1px solid #e8f0f6;
        }
        @media (max-width: 600px) {
            .content-area {
                padding: 1.5rem 1.2rem;
            }
            .site-header {
                padding: 0.4rem 0;
            }
            .my-logo {
                font-size: 1.2rem;
                padding: 0.1rem 0.6rem;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.15rem;
            }
        }
        .featured-image {
            border-radius: 18px;
            overflow: hidden;
            margin: 1.8rem 0 2.2rem;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
            background: #dce6f0;
        }
        .featured-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        .featured-image figcaption {
            padding: 0.7rem 1.2rem;
            background: #f2f7fc;
            font-size: 0.9rem;
            color: #3a5a7a;
            border-top: 1px solid #dce8f0;
        }
        .last-updated {
            display: inline-block;
            background: #eef4fa;
            padding: 0.3rem 1rem;
            border-radius: 30px;
            font-size: 0.85rem;
            color: #2d5a7a;
            margin-bottom: 1rem;
            border: 1px solid #d0dce8;
        }
        .last-updated i {
            margin-right: 0.4rem;
            color: #2d8fcf;
        }
        .form-card {
            background: #f7faff;
            border-radius: 18px;
            padding: 1.8rem 2rem;
            border: 1px solid #dce8f2;
            margin: 2.5rem 0;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
        }
        .form-card h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 0.3rem;
            font-size: 0.95rem;
            color: #1a3a4e;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 2px solid #d0dce8;
            border-radius: 12px;
            font-size: 0.95rem;
            font-family: inherit;
            transition: border 0.25s ease, box-shadow 0.25s ease;
            background: #fff;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: #2d8fcf;
            box-shadow: 0 0 0 4px rgba(45, 143, 207, 0.12);
            outline: none;
        }
        .form-group textarea {
            min-height: 110px;
            resize: vertical;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            background: #1a4a6e;
            color: #fff;
            padding: 0.7rem 2rem;
            border: none;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 12px rgba(26, 74, 110, 0.3);
        }
        .btn:hover {
            background: #0b2a3e;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(26, 74, 110, 0.35);
        }
        .btn-secondary {
            background: #e8f0f8;
            color: #1a4a6e;
            box-shadow: none;
        }
        .btn-secondary:hover {
            background: #d0dce8;
            transform: translateY(-1px);
            box-shadow: none;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            gap: 0.2rem;
            justify-content: flex-end;
            font-size: 2rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            cursor: pointer;
            color: #d0dce8;
            transition: color 0.2s ease;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #facc15;
        }
        .comment-item {
            padding: 1.2rem 1.5rem;
            border-radius: 14px;
            background: #f7faff;
            border: 1px solid #e2edf5;
            margin-bottom: 1rem;
        }
        .comment-item .author {
            font-weight: 700;
            color: #0b2a3e;
        }
        .comment-item .date {
            font-size: 0.8rem;
            color: #6a7f94;
            margin-left: 0.8rem;
        }
        .comment-item .text {
            margin-top: 0.4rem;
        }
        .site-footer {
            background: #0b2a3e;
            color: #c8dae8;
            padding: 2.5rem 0 1.5rem;
            margin-top: 2rem;
            border-top: 4px solid #2d8fcf;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }
        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
        }
        .site-footer h4 {
            color: #fff;
            margin-top: 0;
            font-size: 1.1rem;
            border-left: 3px solid #facc15;
            padding-left: 0.8rem;
        }
        .site-footer a {
            color: #aac8e0;
        }
        .site-footer a:hover {
            color: #fff;
        }
        .friend-links {
            list-style: none;
            padding: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 1rem;
        }
        .friend-links li::before {
            content: "•";
            color: #facc15;
            margin-right: 0.3rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.8rem;
            margin-top: 1.8rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.9rem;
            color: #8aa8c0;
        }
        .copyright strong {
            color: #dce8f2;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav.desktop-nav {
                display: none;
            }
            .nav-mobile.open {
                display: flex;
            }
            .header-inner {
                align-items: center;
            }
        }
        @media (min-width: 769px) {
            .nav-mobile {
                display: none !important;
            }
            .main-nav.desktop-nav {
                display: flex !important;
            }
        }
        .highlight-box {
            background: linear-gradient(135deg, #f0f8ff, #e6f0fa);
            border-radius: 18px;
            padding: 1.8rem 2rem;
            border-left: 6px solid #2d8fcf;
            margin: 1.8rem 0;
        }
        .emoji-big {
            font-size: 1.4rem;
            display: inline-block;
            margin-right: 0.3rem;
        }
        .tag {
            display: inline-block;
            background: #e6f0fa;
            padding: 0.15rem 0.8rem;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 600;
            color: #1a4a6e;
            margin-right: 0.3rem;
        }
        .two-col {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
        }
        @media (max-width: 640px) {
            .two-col {
                grid-template-columns: 1fr;
            }
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.5rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
        }
        table th,
        table td {
            padding: 0.7rem 1rem;
            text-align: left;
            border-bottom: 1px solid #dce8f0;
        }
        table th {
            background: #e6f0fa;
            font-weight: 700;
            color: #0b2a3e;
        }
        table tr:hover td {
            background: #f7faff;
        }
        .author-bio {
            display: flex;
            gap: 1.2rem;
            align-items: center;
            background: #f2f7fc;
            border-radius: 16px;
            padding: 1.2rem 1.8rem;
            margin: 2rem 0;
            border: 1px solid #dce8f2;
        }
        .author-bio .avatar {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: #1a4a6e;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 2rem;
            font-weight: 700;
            flex-shrink: 0;
        }
        .author-bio .info {
            font-size: 0.95rem;
        }
        .author-bio .info strong {
            color: #0b2a3e;
        }
        .smooth-section {
            scroll-margin-top: 80px;
        }