*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #1a3a6b;
            --secondary: #f5a623;
            --accent: #2ecc71;
            --light: #f8f9fa;
            --dark: #222;
            --text: #444;
            --border: #e0e0e0;
        }
        body {
            font-family: 'Segoe UI', Roboto, Arial, sans-serif;
            line-height: 1.75;
            color: var(--text);
            background: #fff;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: var(--primary);
            padding: 14px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 12px rgba(0, 0, 0, .15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            text-decoration: none;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo i {
            color: var(--secondary);
            font-size: 2.2rem;
        }
        .my-logo span {
            color: var(--secondary);
        }
        .nav-bar {
            display: flex;
            align-items: center;
            gap: 18px;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 18px;
        }
        .nav-links a {
            color: #fff;
            text-decoration: none;
            font-weight: 500;
            font-size: .92rem;
            padding: 6px 10px;
            border-radius: 6px;
            transition: background .2s;
        }
        .nav-links a:hover {
            background: rgba(255, 255, 255, .15);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
        }
        .breadcrumb-wrap {
            background: var(--light);
            border-bottom: 1px solid var(--border);
            padding: 10px 0;
            font-size: .85rem;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            list-style: none;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin: 0 6px;
            color: #999;
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb .active {
            color: #888;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 30px;
            padding: 30px 0 50px;
        }
        @media(min-width:992px) {
            .content-grid {
                grid-template-columns: 1fr 320px;
            }
        }
        .main-content {
            min-width: 0;
        }
        .sidebar {
            background: var(--light);
            border-radius: 12px;
            padding: 24px;
            border: 1px solid var(--border);
            height: fit-content;
            position: sticky;
            top: 80px;
        }
        h1 {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 10px;
            line-height: 1.3;
        }
        h2 {
            font-size: 1.6rem;
            color: var(--primary);
            margin: 40px 0 14px;
            padding-bottom: 8px;
            border-bottom: 3px solid var(--secondary);
        }
        h3 {
            font-size: 1.2rem;
            color: var(--dark);
            margin: 20px 0 10px;
        }
        h4 {
            font-size: 1rem;
            color: var(--primary);
            margin: 15px 0 6px;
        }
        p {
            margin-bottom: 14px;
        }
        .lead {
            font-size: 1.1rem;
            color: #555;
        }
        .highlight {
            background: #fff9e8;
            border-left: 4px solid var(--secondary);
            padding: 12px 18px;
            border-radius: 0 8px 8px 0;
            margin: 18px 0;
        }
        .highlight p:last-child {
            margin-bottom: 0;
        }
        ul,
        ol {
            margin: 10px 0 16px 24px;
        }
        li {
            margin-bottom: 6px;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 18px 0;
            font-size: .9rem;
        }
        table th,
        table td {
            border: 1px solid var(--border);
            padding: 10px;
            text-align: left;
        }
        table th {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
        }
        table tr:nth-child(even) {
            background: #f7f7f7;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 12px;
        }
        figure {
            margin: 20px 0;
            text-align: center;
        }
        figcaption {
            font-size: .88rem;
            color: #888;
            margin-top: 8px;
            font-style: italic;
        }
        .widget-box {
            background: #fff;
            border-radius: 10px;
            padding: 20px;
            border: 1px solid var(--border);
            margin-bottom: 18px;
        }
        .widget-box h3 {
            margin-top: 0;
            font-size: 1.1rem;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .widget-box form {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .widget-box input[type="text"],
        .widget-box input[type="email"],
        .widget-box textarea,
        .widget-box select {
            width: 100%;
            padding: 10px 12px;
            border: 1px solid var(--border);
            border-radius: 6px;
            font-size: .9rem;
            font-family: inherit;
        }
        .widget-box textarea {
            min-height: 80px;
            resize: vertical;
        }
        .btn {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 10px 20px;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            font-size: .9rem;
            transition: background .2s;
            text-decoration: none;
            display: inline-block;
            text-align: center;
        }
        .btn:hover {
            background: #0f2a52;
        }
        .btn-secondary {
            background: var(--secondary);
        }
        .btn-secondary:hover {
            background: #d49310;
        }
        .rating-input {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 4px;
        }
        .rating-input input {
            display: none;
        }
        .rating-input label {
            font-size: 1.6rem;
            color: #ccc;
            cursor: pointer;
            transition: color .2s;
        }
        .rating-input label:hover,
        .rating-input label:hover~label,
        .rating-input input:checked~label {
            color: var(--secondary);
        }
        .pattern-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 16px;
            margin: 20px 0;
        }
        .pattern-card {
            background: var(--light);
            border-radius: 10px;
            padding: 16px;
            text-align: center;
            border: 1px solid var(--border);
            transition: transform .2s, box-shadow .2s;
        }
        .pattern-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 4px 16px rgba(0, 0, 0, .08);
        }
        .pattern-card i {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .pattern-card span {
            display: block;
            font-weight: 600;
            color: var(--dark);
            font-size: .9rem;
        }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: 8px;
            margin-bottom: 12px;
            padding: 16px;
            background: #fff;
        }
        .faq-item h4 {
            margin-top: 0;
            color: var(--primary);
            cursor: pointer;
        }
        .faq-item p {
            margin-bottom: 0;
            font-size: .9rem;
        }
        .site-footer {
            background: #13233f;
            color: #aab8cc;
            padding: 40px 0 0;
            margin-top: 40px;
        }
        .footer-bottom {
            background: #0d1a2e;
            padding: 16px 0;
            font-size: .85rem;
            text-align: center;
            color: #6a7b91;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, .04);
            padding: 16px;
            border-radius: 8px;
            margin-bottom: 24px;
            font-size: .9rem;
        }
        friend-link a {
            color: #d4e0ef;
            text-decoration: none;
            margin-right: 16px;
        }
        friend-link a:hover {
            color: var(--secondary);
        }
        @media(max-width:768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background: var(--primary);
                padding: 10px 0;
                border-radius: 0 0 8px 8px;
            }
            .nav-links.open {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .header-inner {
                flex-wrap: wrap;
            }
            .sidebar {
                position: static;
                order: 2;
            }
            .content-grid {
                grid-template-columns: 1fr;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.3rem;
            }
        }