*,
        *::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, Helvetica, Arial, sans-serif;
            background: #f7f5f2;
            color: #1e2a3a;
            line-height: 1.75;
            padding: 0;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #c44536;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #9a2e1f;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1rem;
        }
        header {
            background: linear-gradient(145deg, #1e3a5f 0%, #2a4f7a 100%);
            color: #fff;
            padding: 0.6rem 0;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.5rem 1rem;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #f9e07f;
            text-shadow: 2px 2px 0 #c44536;
            transition: transform 0.2s;
            font-family: 'Trebuchet MS', 'Segoe UI', sans-serif;
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
            color: #f9e07f;
        }
        .my-logo small {
            font-size: 0.7rem;
            font-weight: 400;
            color: #bcd4e8;
            display: block;
            letter-spacing: 1px;
            text-shadow: none;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .nav-list {
            list-style: none;
            display: flex;
            gap: 0.3rem 0.8rem;
            flex-wrap: wrap;
            padding: 0;
            margin: 0;
        }
        .nav-list li a {
            color: #e8edf3;
            font-size: 0.95rem;
            font-weight: 500;
            padding: 0.4rem 0.7rem;
            border-radius: 30px;
            transition: background 0.25s, color 0.25s;
            display: inline-block;
        }
        .nav-list li a:hover {
            background: rgba(255, 255, 255, 0.18);
            color: #f9e07f;
            text-decoration: none;
        }
        .nav-list li a i {
            margin-right: 0.3rem;
            font-size: 0.85rem;
        }
        .hamburger {
            display: none;
            background: none;
            border: 2px solid rgba(255, 255, 255, 0.5);
            color: #fff;
            font-size: 1.6rem;
            padding: 0.2rem 0.7rem;
            border-radius: 8px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.15);
        }
        .breadcrumb {
            background: #eae6e0;
            padding: 0.5rem 0;
            font-size: 0.85rem;
            border-bottom: 1px solid #d6cec4;
        }
        .breadcrumb ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
            padding: 0;
            margin: 0;
        }
        .breadcrumb ul li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #8a7e72;
            font-weight: 600;
        }
        .breadcrumb a {
            color: #4a6a8a;
        }
        .breadcrumb .current {
            color: #1e2a3a;
            font-weight: 600;
        }
        main {
            padding: 2rem 0 3rem;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2.5rem;
        }
        h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #1e3a5f;
            line-height: 1.2;
            margin-bottom: 0.75rem;
            border-left: 6px solid #c44536;
            padding-left: 1rem;
        }
        h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: #1e3a5f;
            margin-top: 2.8rem;
            margin-bottom: 1rem;
            border-bottom: 3px solid #d6cec4;
            padding-bottom: 0.4rem;
        }
        h3 {
            font-size: 1.35rem;
            font-weight: 600;
            color: #2a4f7a;
            margin-top: 2rem;
            margin-bottom: 0.6rem;
        }
        h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: #3a5f8a;
            margin-top: 1.5rem;
            margin-bottom: 0.4rem;
        }
        p {
            margin-bottom: 1.2rem;
        }
        .lead {
            font-size: 1.15rem;
            color: #2a3a4a;
            font-weight: 400;
        }
        .highlight {
            background: #f9e07f88;
            padding: 0.1rem 0.3rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .emoji-big {
            font-size: 1.4rem;
        }
        .card-simple {
            background: #fff;
            border-radius: 16px;
            padding: 1.6rem 1.8rem;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
            margin-bottom: 1.8rem;
            border: 1px solid #eae6e0;
            transition: box-shadow 0.25s;
        }
        .card-simple:hover {
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.07);
        }
        .stat-box {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 1rem;
            margin: 1.5rem 0;
        }
        .stat-item {
            background: #f0ede8;
            border-radius: 12px;
            padding: 1rem 0.8rem;
            text-align: center;
            font-weight: 600;
            border: 1px solid #e0d8ce;
        }
        .stat-item .num {
            font-size: 2rem;
            color: #c44536;
            display: block;
            line-height: 1.2;
        }
        .stat-item .label {
            font-size: 0.85rem;
            color: #4a5a6a;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .feature-image {
            border-radius: 16px;
            overflow: hidden;
            margin: 1.8rem 0;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
            background: #eae6e0;
        }
        .feature-image img {
            width: 100%;
            object-fit: cover;
            aspect-ratio: 16/9;
        }
        .feature-image figcaption {
            padding: 0.6rem 1rem;
            font-size: 0.85rem;
            color: #4a5a6a;
            background: #fff;
            border-top: 1px solid #eae6e0;
            font-style: italic;
        }
        .form-card {
            background: #fff;
            border-radius: 16px;
            padding: 1.8rem 2rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
            border: 1px solid #eae6e0;
            margin-bottom: 1.8rem;
        }
        .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;
            font-size: 0.95rem;
            color: #1e2a3a;
            margin-bottom: 0.2rem;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 2px solid #d6cec4;
            border-radius: 10px;
            font-size: 1rem;
            font-family: inherit;
            transition: border-color 0.25s, box-shadow 0.25s;
            background: #faf9f7;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: #c44536;
            box-shadow: 0 0 0 4px rgba(196, 69, 54, 0.12);
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .btn {
            padding: 0.7rem 1.8rem;
            border: none;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .btn-primary {
            background: #c44536;
            color: #fff;
        }
        .btn-primary:hover {
            background: #9a2e1f;
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            color: #c44536;
            border: 2px solid #c44536;
        }
        .btn-outline:hover {
            background: #c44536;
            color: #fff;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.2rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 2rem;
            color: #d6cec4;
            cursor: pointer;
            transition: color 0.2s, transform 0.15s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f5b342;
            transform: scale(1.08);
        }
        .score-display {
            font-size: 1.2rem;
            font-weight: 600;
            color: #1e3a5f;
            margin-top: 0.5rem;
        }
        friend-link {
            display: block;
            background: #1e3a5f;
            color: #e8edf3;
            border-radius: 16px;
            padding: 1.8rem 2rem;
            margin-top: 2.5rem;
        }
        friend-link ul {
            list-style: none;
            padding: 0;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 0.6rem 1.2rem;
        }
        friend-link ul li a {
            color: #f9e07f;
            font-weight: 500;
            padding: 0.3rem 0;
            display: inline-block;
        }
        friend-link ul li a:hover {
            color: #fff;
            text-decoration: underline;
        }
        friend-link .fl-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: #f9e07f;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        footer {
            background: #0f1f2f;
            color: #bcd4e8;
            padding: 2rem 0 1.2rem;
            margin-top: 2.5rem;
            border-top: 4px solid #c44536;
        }
        footer .copyright {
            text-align: center;
            font-size: 0.9rem;
            padding-top: 1.2rem;
            border-top: 1px solid #2a4f7a;
            margin-top: 1.2rem;
        }
        footer .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 1.5rem;
        }
        footer h4 {
            color: #f9e07f;
            margin-top: 0;
            margin-bottom: 0.5rem;
            font-size: 1rem;
        }
        footer ul {
            list-style: none;
            padding: 0;
        }
        footer ul li a {
            color: #bcd4e8;
            font-size: 0.9rem;
        }
        footer ul li a:hover {
            color: #f9e07f;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #1e3a5f;
                padding: 0.8rem 0.5rem;
                border-radius: 12px;
                margin-top: 0.5rem;
                gap: 0.2rem;
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list li a {
                padding: 0.6rem 1rem;
                border-radius: 8px;
            }
            .nav-wrapper {
                flex-wrap: wrap;
            }
            h1 {
                font-size: 1.7rem;
                padding-left: 0.7rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            .header-inner {
                flex-wrap: wrap;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .stat-box {
                grid-template-columns: repeat(2, 1fr);
            }
            .form-card {
                padding: 1.2rem 1.2rem;
            }
            .card-simple {
                padding: 1.2rem 1.2rem;
            }
            friend-link ul {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 0.6rem;
            }
            h1 {
                font-size: 1.4rem;
            }
            .stat-box {
                grid-template-columns: 1fr 1fr;
                gap: 0.6rem;
            }
            .stat-item .num {
                font-size: 1.5rem;
            }
            friend-link ul {
                grid-template-columns: 1fr;
            }
        }
        .last-updated {
            font-size: 0.85rem;
            color: #6a7a8a;
            margin-top: 0.5rem;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .tag {
            display: inline-block;
            background: #e0d8ce;
            color: #1e2a3a;
            padding: 0.2rem 0.8rem;
            border-radius: 30px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .inline-link {
            font-weight: 600;
            color: #c44536;
        }
        .inline-link:hover {
            text-decoration: underline;
        }
        .toc {
            background: #fff;
            border-radius: 16px;
            padding: 1.4rem 1.8rem;
            border: 1px solid #eae6e0;
            margin-bottom: 2rem;
        }
        .toc ol {
            columns: 2 220px;
            column-gap: 2rem;
            padding-left: 1.2rem;
        }
        .toc ol li {
            break-inside: avoid;
            margin-bottom: 0.3rem;
        }
        .toc ol li a {
            color: #2a4f7a;
            font-weight: 500;
        }
        @media (max-width: 600px) {
            .toc ol {
                columns: 1;
            }
        }