*,
        *::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;
            background: #fafaf8;
            color: #1e1e1e;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #b74b2c;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover,
        a:focus-visible {
            color: #7a2e1a;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }
        .site-header {
            background: #1f3a3f;
            color: #f5f0e8;
            padding: 0.75rem 0;
            border-bottom: 4px solid #d98a4a;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.10);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: #f5e3c9;
            text-transform: uppercase;
            text-decoration: none !important;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            transition: opacity 0.2s;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none !important;
        }
        .my-logo i {
            color: #d98a4a;
            font-size: 1.8rem;
        }
        .my-logo span {
            font-weight: 300;
            color: #c7b59e;
            font-size: 1rem;
            letter-spacing: 0.3px;
        }
        .nav-bar {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 0.1rem;
            flex-wrap: wrap;
        }
        .nav-list li a {
            display: block;
            padding: 0.5rem 1rem;
            color: #f5f0e8;
            font-weight: 500;
            font-size: 0.95rem;
            border-radius: 6px 6px 0 0;
            transition: background 0.2s, color 0.2s;
            text-decoration: none !important;
        }
        .nav-list li a:hover,
        .nav-list li a:focus-visible {
            background: #d98a4a;
            color: #1f3a3f;
            text-decoration: none !important;
        }
        .nav-list li a.active {
            background: #d98a4a33;
            border-bottom: 2px solid #d98a4a;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #f5f0e8;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.25rem 0.5rem;
            border-radius: 4px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.08);
        }
        .breadcrumb {
            background: #eae6de;
            padding: 0.6rem 1.25rem;
            border-radius: 0 0 8px 8px;
            font-size: 0.9rem;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.4rem;
            margin-top: 0;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
        }
        .breadcrumb a {
            color: #1f3a3f;
            font-weight: 500;
        }
        .breadcrumb a:hover {
            color: #b74b2c;
        }
        .breadcrumb span {
            color: #5e6b66;
        }
        .breadcrumb .sep {
            color: #a09888;
            font-weight: 300;
        }
        main {
            padding: 2rem 0 3rem;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            color: #1f3a3f;
            margin: 0 0 0.75rem;
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #1f3a3f;
            margin: 2.5rem 0 1rem;
            border-bottom: 3px solid #d98a4a;
            padding-bottom: 0.4rem;
        }
        h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: #2b4a50;
            margin: 1.8rem 0 0.75rem;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
            color: #3d5f66;
            margin: 1.2rem 0 0.5rem;
        }
        p {
            margin-bottom: 1.1rem;
            color: #2a2a2a;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 400;
            color: #3d4a4a;
            margin-bottom: 2rem;
            border-left: 4px solid #d98a4a;
            padding-left: 1.2rem;
        }
        strong,
        b {
            color: #1f3a3f;
            font-weight: 700;
        }
        em {
            font-style: italic;
            color: #5a4a3a;
        }
        .feature-img {
            border-radius: 14px;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
            margin: 1.8rem auto 2rem;
            max-width: 100%;
            border: 1px solid #e0d8cc;
        }
        .img-caption {
            text-align: center;
            font-size: 0.9rem;
            color: #5e6b66;
            margin-top: -1.2rem;
            margin-bottom: 2rem;
        }
        .insight-box {
            background: #f5efe6;
            border-radius: 14px;
            padding: 1.5rem 2rem;
            margin: 1.8rem 0;
            border-left: 6px solid #d98a4a;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
        }
        .insight-box i {
            color: #d98a4a;
            margin-right: 0.5rem;
        }
        .grid-2,
        .grid-3 {
            display: grid;
            gap: 1.8rem;
            margin: 2rem 0;
        }
        .grid-2 {
            grid-template-columns: 1fr 1fr;
        }
        .grid-3 {
            grid-template-columns: 1fr 1fr 1fr;
        }
        .card {
            background: #ffffff;
            border-radius: 14px;
            padding: 1.5rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
            border: 1px solid #ece6dc;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
        }
        .card i {
            font-size: 2rem;
            color: #d98a4a;
            margin-bottom: 0.75rem;
        }
        .card h4 {
            margin-top: 0;
        }
        .interaction-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin: 3rem 0 2rem;
            padding: 2rem 0;
            border-top: 2px solid #e0d8cc;
        }
        .interaction-card {
            background: #ffffff;
            border-radius: 16px;
            padding: 1.8rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
            border: 1px solid #ece6dc;
        }
        .interaction-card h3 {
            margin-top: 0;
            font-size: 1.4rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .interaction-card form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
            margin-top: 0.8rem;
        }
        .interaction-card input,
        .interaction-card textarea,
        .interaction-card select {
            padding: 0.7rem 1rem;
            border: 1px solid #d6cec2;
            border-radius: 8px;
            font-size: 1rem;
            background: #fcfaf7;
            transition: border 0.2s, box-shadow 0.2s;
            width: 100%;
        }
        .interaction-card input:focus,
        .interaction-card textarea:focus,
        .interaction-card select:focus {
            outline: none;
            border-color: #d98a4a;
            box-shadow: 0 0 0 3px rgba(217, 138, 74, 0.15);
        }
        .interaction-card textarea {
            min-height: 90px;
            resize: vertical;
        }
        .btn {
            background: #1f3a3f;
            color: #f5f0e8;
            border: none;
            padding: 0.75rem 1.8rem;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 40px;
            cursor: pointer;
            transition: background 0.25s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            width: fit-content;
        }
        .btn:hover {
            background: #d98a4a;
            color: #1f3a3f;
            transform: scale(1.02);
        }
        .btn-secondary {
            background: #e0d8cc;
            color: #1f3a3f;
        }
        .btn-secondary:hover {
            background: #c7b59e;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.2rem;
            font-size: 1.8rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            cursor: pointer;
            color: #d6cec2;
            transition: color 0.15s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f5b342;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.8rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
            background: #fff;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
        }
        th {
            background: #1f3a3f;
            color: #f5f0e8;
            font-weight: 600;
            padding: 0.8rem 1rem;
            text-align: left;
        }
        td {
            padding: 0.7rem 1rem;
            border-bottom: 1px solid #ece6dc;
        }
        tr:last-child td {
            border-bottom: none;
        }
        tr:hover td {
            background: #f8f4ee;
        }
        .site-footer {
            background: #1f3a3f;
            color: #d6cec2;
            padding: 2.5rem 0 1.5rem;
            margin-top: 3rem;
            border-top: 4px solid #d98a4a;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
        }
        .site-footer h4 {
            color: #f5e3c9;
            margin-top: 0;
            font-size: 1.1rem;
        }
        .site-footer a {
            color: #c7b59e;
        }
        .site-footer a:hover {
            color: #f5e3c9;
        }
        friend-link {
            display: block;
            margin: 0.8rem 0;
        }
        friend-link a {
            display: inline-block;
            padding: 0.3rem 0.8rem;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 20px;
            margin: 0.2rem 0.4rem 0.2rem 0;
            font-size: 0.9rem;
            border: 1px solid rgba(255, 255, 255, 0.06);
        }
        friend-link a:hover {
            background: rgba(217, 138, 74, 0.2);
            border-color: #d98a4a;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            margin-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.85rem;
            color: #a09888;
        }
        @media (max-width: 820px) {
            .header-inner {
                flex-wrap: wrap;
            }
            .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #1f3a3f;
                padding: 0.5rem 0 1rem;
                border-radius: 0 0 12px 12px;
                gap: 0;
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list li a {
                padding: 0.7rem 1rem;
                border-radius: 0;
                border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            }
            .hamburger {
                display: block;
            }
            .grid-2,
            .grid-3 {
                grid-template-columns: 1fr;
            }
            .interaction-section {
                grid-template-columns: 1fr;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            h3 {
                font-size: 1.25rem;
            }
            .breadcrumb {
                font-size: 0.8rem;
                padding: 0.4rem 1rem;
                flex-wrap: wrap;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .my-logo span {
                font-size: 0.8rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 0.9rem;
            }
            .insight-box {
                padding: 1rem 1.2rem;
            }
            .card {
                padding: 1rem;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .interaction-card {
                padding: 1.2rem;
            }
        }
        .text-center {
            text-align: center;
        }
        .mt-2 {
            margin-top: 2rem;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }
        .last-updated {
            font-size: 0.9rem;
            color: #6a7a7a;
            background: #f0ece4;
            display: inline-block;
            padding: 0.3rem 1rem;
            border-radius: 40px;
            margin-bottom: 1.5rem;
        }
        .last-updated i {
            margin-right: 0.4rem;
        }
        .skip-link {
            position: absolute;
            top: -100%;
            left: 1rem;
            background: #d98a4a;
            color: #1f3a3f;
            padding: 0.5rem 1.2rem;
            border-radius: 0 0 8px 8px;
            font-weight: 600;
            z-index: 9999;
            transition: top 0.2s;
        }
        .skip-link:focus {
            top: 0;
            text-decoration: none;
        }