*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
            background: #f8f6f0;
            color: #2d2d2d;
            line-height: 1.8;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: #1a3a5c;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover {
            color: #c9a84c;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            padding-left: 1.6rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: #1a3a5c;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .site-header {
            background: linear-gradient(135deg, #1a3a5c 0%, #2a5a7c 100%);
            padding: 1rem 0;
            box-shadow: 0 4px 18px rgba(0, 0, 0, 0.12);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            color: #f8f6f0;
            letter-spacing: 1px;
            text-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
            transition: transform 0.3s ease;
        }
        .my-logo:hover {
            transform: scale(1.02);
            color: #c9a84c;
        }
        .my-logo span {
            color: #c9a84c;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #f8f6f0;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.3rem 0.6rem;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.12);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 0.2rem;
            flex-wrap: wrap;
        }
        .nav-menu a {
            color: #f8f6f0;
            padding: 0.5rem 1rem;
            border-radius: 30px;
            font-weight: 500;
            font-size: 0.92rem;
            transition: background 0.25s, color 0.25s;
        }
        .nav-menu a:hover {
            background: rgba(201, 168, 76, 0.25);
            color: #c9a84c;
        }
        .nav-menu a.active {
            background: #c9a84c;
            color: #1a3a5c;
        }
        .breadcrumb {
            background: #f0ede4;
            padding: 0.75rem 0;
            font-size: 0.88rem;
            border-bottom: 1px solid #e0dcd0;
        }
        .breadcrumb ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 0.8rem;
            padding: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #888;
            font-weight: 600;
        }
        .breadcrumb a {
            color: #1a3a5c;
        }
        .breadcrumb .current {
            color: #888;
            font-weight: 500;
        }
        .hero {
            background: linear-gradient(145deg, #1a3a5c, #10304a);
            color: #f8f6f0;
            padding: 3.5rem 0 3rem;
            text-align: center;
            border-bottom: 5px solid #c9a84c;
        }
        .hero h1 {
            font-size: 2.7rem;
            color: #f8f6f0;
            margin-bottom: 0.8rem;
            letter-spacing: -0.5px;
        }
        .hero h1 span {
            color: #c9a84c;
        }
        .hero p {
            font-size: 1.15rem;
            max-width: 760px;
            margin: 0 auto 1.2rem;
            opacity: 0.9;
            line-height: 1.7;
        }
        .hero .meta-info {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 1.5rem 2.5rem;
            font-size: 0.95rem;
            color: #d4cfc0;
        }
        .hero .meta-info i {
            margin-right: 0.4rem;
            color: #c9a84c;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2.5rem 0;
        }
        .main-content {
            min-width: 0;
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        .sidebar-card {
            background: #ffffff;
            border-radius: 14px;
            padding: 1.6rem;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.06);
            margin-bottom: 1.8rem;
            border: 1px solid #eeeae0;
        }
        .sidebar-card h3 {
            font-size: 1.2rem;
            margin-bottom: 1rem;
            border-bottom: 2px solid #c9a84c;
            padding-bottom: 0.6rem;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
        }
        .sidebar-card li {
            padding: 0.5rem 0;
            border-bottom: 1px dashed #f0ede4;
        }
        .sidebar-card li:last-child {
            border-bottom: none;
        }
        .sidebar-card a {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 500;
        }
        .sidebar-card a i {
            color: #c9a84c;
            font-size: 0.8rem;
        }
        .content-section {
            background: #ffffff;
            border-radius: 16px;
            padding: 2.2rem 2.5rem;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.05);
            border: 1px solid #eeeae0;
            margin-bottom: 2rem;
        }
        .content-section h2 {
            font-size: 2rem;
            margin: 2.2rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid #c9a84c;
        }
        .content-section h2:first-child {
            margin-top: 0;
        }
        .content-section h3 {
            font-size: 1.5rem;
            margin: 1.8rem 0 0.8rem;
            color: #2a5a7c;
        }
        .content-section h4 {
            font-size: 1.2rem;
            margin: 1.4rem 0 0.6rem;
            color: #1a3a5c;
        }
        .content-section p {
            margin-bottom: 1.1rem;
            text-align: justify;
        }
        .content-section ul,
        .content-section ol {
            margin-bottom: 1.2rem;
        }
        .content-section li {
            margin-bottom: 0.4rem;
        }
        .highlight-box {
            background: #f8f6f0;
            border-left: 5px solid #c9a84c;
            padding: 1.2rem 1.6rem;
            border-radius: 0 12px 12px 0;
            margin: 1.5rem 0;
        }
        .highlight-box p:last-child {
            margin-bottom: 0;
        }
        .pattern-card {
            background: #fcfaf5;
            border: 1px solid #e8e2d4;
            border-radius: 14px;
            padding: 1.5rem 1.8rem;
            margin: 1.5rem 0;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .pattern-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 28px rgba(0, 0, 0, 0.08);
        }
        .pattern-card h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .pattern-card h3 i {
            color: #c9a84c;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.5rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
        }
        table th {
            background: #1a3a5c;
            color: #f8f6f0;
            padding: 0.75rem 1rem;
            text-align: left;
            font-weight: 600;
        }
        table td {
            padding: 0.7rem 1rem;
            border-bottom: 1px solid #e8e2d4;
        }
        table tr:nth-child(even) {
            background: #f8f6f0;
        }
        table tr:hover {
            background: #f0ede4;
        }
        .image-wrapper {
            margin: 2rem 0;
            border-radius: 14px;
            overflow: hidden;
            box-shadow: 0 8px 26px rgba(0, 0, 0, 0.08);
        }
        .image-wrapper img {
            width: 100%;
        }
        .image-wrapper figcaption {
            background: #f8f6f0;
            padding: 0.8rem 1.2rem;
            font-size: 0.9rem;
            color: #555;
            text-align: center;
            font-style: italic;
        }
        .btn {
            display: inline-block;
            background: #c9a84c;
            color: #1a3a5c;
            padding: 0.6rem 1.6rem;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: background 0.25s, transform 0.2s;
        }
        .btn:hover {
            background: #b8963a;
            transform: translateY(-2px);
            color: #1a3a5c;
        }
        .search-form {
            display: flex;
            gap: 0.6rem;
            margin: 1.8rem 0;
            flex-wrap: wrap;
        }
        .search-form input {
            flex: 1;
            min-width: 180px;
            padding: 0.75rem 1.2rem;
            border: 2px solid #e0dcd0;
            border-radius: 30px;
            font-size: 1rem;
            outline: none;
            transition: border-color 0.3s;
        }
        .search-form input:focus {
            border-color: #c9a84c;
        }
        .search-form button {
            background: #1a3a5c;
            color: #f8f6f0;
            border: none;
            padding: 0.75rem 1.8rem;
            border-radius: 30px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s;
        }
        .search-form button:hover {
            background: #2a5a7c;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.8rem;
            margin: 2rem 0;
        }
        .feedback-card {
            background: #f8f6f0;
            border-radius: 14px;
            padding: 1.5rem 1.8rem;
            border: 1px solid #e8e2d4;
        }
        .feedback-card h3 {
            margin-top: 0;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
            margin-top: 0.8rem;
        }
        .feedback-card input,
        .feedback-card textarea,
        .feedback-card select {
            padding: 0.65rem 1rem;
            border: 2px solid #e0dcd0;
            border-radius: 10px;
            font-size: 0.95rem;
            outline: none;
            font-family: inherit;
            transition: border-color 0.3s;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            border-color: #c9a84c;
        }
        .feedback-card textarea {
            min-height: 90px;
            resize: vertical;
        }
        .feedback-card .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.2rem;
        }
        .feedback-card .star-rating input {
            display: none;
        }
        .feedback-card .star-rating label {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .feedback-card .star-rating input:checked~label,
        .feedback-card .star-rating label:hover,
        .feedback-card .star-rating label:hover~label {
            color: #c9a84c;
        }
        friend-link {
            display: block;
            background: #1a3a5c;
            color: #f8f6f0;
            padding: 2rem 0;
            margin-top: 2rem;
        }
        friend-link .container {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem 1.8rem;
            justify-content: center;
        }
        friend-link a {
            color: #c9a84c;
            font-weight: 500;
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
            background: rgba(255, 255, 255, 0.06);
            transition: background 0.25s, color 0.25s;
        }
        friend-link a:hover {
            background: rgba(201, 168, 76, 0.2);
            color: #f8f6f0;
        }
        friend-link .label {
            width: 100%;
            text-align: center;
            font-size: 1.1rem;
            font-weight: 600;
            letter-spacing: 1px;
            color: #c9a84c;
            margin-bottom: 0.4rem;
        }
        .site-footer {
            background: #0e2638;
            color: #ccc;
            padding: 1.8rem 0;
            text-align: center;
            font-size: 0.9rem;
        }
        .site-footer .copyright {
            color: #a09888;
        }
        .site-footer a {
            color: #c9a84c;
        }
        @media (max-width: 992px) {
            .main-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 1.2rem;
            }
            .hero h1 {
                font-size: 2.1rem;
            }
            .content-section {
                padding: 1.6rem 1.4rem;
            }
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding: 0.8rem 0 0.2rem;
                gap: 0.3rem;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 0.6rem 1rem;
                border-radius: 8px;
            }
            .header-inner {
                align-items: center;
            }
            .hero h1 {
                font-size: 1.7rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .hero .meta-info {
                flex-direction: column;
                gap: 0.4rem;
            }
            .feedback-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                grid-template-columns: 1fr;
            }
            .content-section {
                padding: 1.2rem 1rem;
            }
            .content-section h2 {
                font-size: 1.6rem;
            }
            .content-section h3 {
                font-size: 1.25rem;
            }
            .my-logo {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 0.8rem;
            }
            .hero {
                padding: 2rem 0;
            }
            .hero h1 {
                font-size: 1.4rem;
            }
            .search-form input {
                min-width: 120px;
            }
            table {
                font-size: 0.82rem;
            }
            table th,
            table td {
                padding: 0.5rem 0.6rem;
            }
        }