*,
        *::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, sans-serif;
            background: #faf9f6;
            color: #1e2a3a;
            line-height: 1.7;
            padding: 0 1.25rem;
        }
        a {
            color: #1a6d7a;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover,
        a:focus-visible {
            color: #0e4a56;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.2;
            color: #0f2a36;
            font-weight: 600;
        }
        h1 {
            font-size: clamp(2rem, 5vw, 3.2rem);
            margin-bottom: 0.75rem;
        }
        h2 {
            font-size: clamp(1.5rem, 3.5vw, 2.2rem);
            margin-top: 2.8rem;
            margin-bottom: 0.6rem;
            border-left: 6px solid #1a6d7a;
            padding-left: 1rem;
        }
        h3 {
            font-size: clamp(1.2rem, 2.5vw, 1.6rem);
            margin-top: 2rem;
            margin-bottom: 0.4rem;
        }
        h4 {
            font-size: clamp(1rem, 2vw, 1.25rem);
            margin-top: 1.5rem;
            margin-bottom: 0.3rem;
            font-weight: 500;
        }
        p,
        li {
            font-size: 1rem;
            margin-bottom: 0.9rem;
        }
        ul,
        ol {
            padding-left: 1.6rem;
            margin-bottom: 1.2rem;
        }
        hr {
            border: none;
            border-top: 2px solid #e2e0da;
            margin: 2.5rem 0;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: #ffffff;
            border-radius: 24px 24px 0 0;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
            padding: 0 1.8rem 2rem;
        }
        @media (max-width: 640px) {
            .container {
                padding: 0 1rem 1.5rem;
                border-radius: 16px 16px 0 0;
            }
            body {
                padding: 0 0.5rem;
            }
        }
        header {
            padding: 1.2rem 0 0.6rem;
            border-bottom: 2px solid #f0ede8;
            position: relative;
        }
        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.8rem 1.5rem;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: #0f2a36;
            background: linear-gradient(135deg, #1a6d7a, #2b8c9c);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }
        .my-logo:hover {
            text-decoration: none;
            opacity: 0.85;
        }
        .my-logo i {
            -webkit-text-fill-color: #1a6d7a;
            font-size: 1.8rem;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 0.5rem 1.2rem;
            flex-wrap: wrap;
        }
        .main-nav {
            display: flex;
            gap: 0.4rem 1.4rem;
            flex-wrap: wrap;
            align-items: center;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .main-nav a {
            font-weight: 500;
            padding: 0.3rem 0.2rem;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s, color 0.2s;
            font-size: 0.95rem;
        }
        .main-nav a:hover {
            border-bottom-color: #1a6d7a;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.6rem;
            background: none;
            border: none;
            color: #0f2a36;
            cursor: pointer;
            padding: 0.2rem 0.4rem;
            transition: transform 0.2s;
        }
        .hamburger:active {
            transform: scale(0.92);
        }
        @media (max-width: 768px) {
            .hamburger {
                display: inline-block;
            }
            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #f8f6f2;
                padding: 1rem 1.2rem;
                border-radius: 12px;
                margin-top: 0.6rem;
                gap: 0.6rem;
                border: 1px solid #e8e4de;
            }
            .main-nav.open {
                display: flex;
            }
            .nav-wrapper {
                flex-wrap: wrap;
            }
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.3rem 0.6rem;
            font-size: 0.85rem;
            padding: 0.6rem 0 0.2rem;
            color: #5f6b7a;
        }
        .breadcrumb a {
            color: #1a6d7a;
        }
        .breadcrumb span {
            color: #8f9aa8;
        }
        .search-section {
            margin: 1.8rem 0 1.2rem;
            display: flex;
            justify-content: center;
        }
        .search-form {
            display: flex;
            width: 100%;
            max-width: 600px;
            border-radius: 60px;
            overflow: hidden;
            border: 2px solid #e2e0da;
            background: #fff;
            transition: border-color 0.25s, box-shadow 0.25s;
        }
        .search-form:focus-within {
            border-color: #1a6d7a;
            box-shadow: 0 0 0 4px rgba(26, 109, 122, 0.12);
        }
        .search-form input {
            flex: 1;
            border: none;
            padding: 0.8rem 1.4rem;
            font-size: 1rem;
            background: transparent;
            outline: none;
            color: #1e2a3a;
        }
        .search-form button {
            background: #1a6d7a;
            color: #fff;
            border: none;
            padding: 0.8rem 1.6rem;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 500;
        }
        .search-form button:hover {
            background: #0e4a56;
        }
        .hero {
            background: linear-gradient(135deg, #f0f4f0, #e6eee8);
            border-radius: 20px;
            padding: 2rem 2.2rem;
            margin: 1.5rem 0 2.5rem;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 2rem;
        }
        .hero-text {
            flex: 1 1 320px;
        }
        .hero-img {
            flex: 0 0 240px;
            border-radius: 16px;
            box-shadow: 0 12px 28px rgba(0, 0, 0, 0.08);
            background: #fff;
            padding: 0.5rem;
        }
        .hero-img img {
            border-radius: 12px;
            width: 100%;
        }
        .hero h1 {
            margin-bottom: 0.4rem;
        }
        .hero .tagline {
            font-size: 1.1rem;
            color: #3b5a6a;
            margin-bottom: 0.8rem;
        }
        .hero .update-badge {
            display: inline-block;
            background: #1a6d7a;
            color: #fff;
            padding: 0.2rem 1rem;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 500;
            letter-spacing: 0.02em;
        }
        @media (max-width: 640px) {
            .hero {
                padding: 1.4rem 1.2rem;
                flex-direction: column;
            }
            .hero-img {
                flex: 0 0 auto;
                width: 100%;
                max-width: 300px;
            }
        }
        .toc {
            background: #f4f2ee;
            border-radius: 16px;
            padding: 1.6rem 2rem;
            margin: 2rem 0 2.5rem;
            border-left: 5px solid #1a6d7a;
        }
        .toc h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .toc ol {
            columns: 2 260px;
            column-gap: 2rem;
            padding-left: 1.4rem;
            margin-bottom: 0;
        }
        .toc li {
            margin-bottom: 0.4rem;
            break-inside: avoid;
        }
        .toc a {
            font-weight: 500;
        }
        @media (max-width: 500px) {
            .toc ol {
                columns: 1;
            }
        }
        .link-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 0.8rem 1rem;
            margin: 1.8rem 0;
            padding: 0;
            list-style: none;
        }
        .link-grid li a {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            background: #f8f6f2;
            padding: 0.7rem 1.2rem;
            border-radius: 12px;
            font-weight: 500;
            transition: background 0.2s, transform 0.15s;
            border: 1px solid #edebe6;
        }
        .link-grid li a:hover {
            background: #e8eee8;
            transform: translateY(-2px);
            text-decoration: none;
            border-color: #c6d6ce;
        }
        .link-grid li a i {
            color: #1a6d7a;
            font-size: 1.1rem;
            width: 1.4rem;
            text-align: center;
        }
        .feature-box {
            background: #fbfaf7;
            border-radius: 16px;
            padding: 1.6rem 1.8rem;
            margin: 1.2rem 0;
            border: 1px solid #edebe6;
        }
        .feature-box h4 {
            margin-top: 0;
        }
        .score-area {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.8rem 2rem;
            background: #f4f2ee;
            border-radius: 16px;
            padding: 1.2rem 1.8rem;
            margin: 1.8rem 0;
        }
        .star-rating {
            display: flex;
            gap: 0.2rem;
            font-size: 1.6rem;
            color: #d4c8b0;
            cursor: default;
        }
        .star-rating .star {
            cursor: pointer;
            transition: color 0.15s, transform 0.1s;
        }
        .star-rating .star:hover,
        .star-rating .star.active {
            color: #f5b342;
            transform: scale(1.1);
        }
        .form-card {
            background: #f8f6f2;
            border-radius: 16px;
            padding: 1.6rem 1.8rem;
            margin: 1.8rem 0;
            border: 1px solid #e8e4de;
        }
        .form-card form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .form-card label {
            font-weight: 600;
            font-size: 0.95rem;
            color: #1e2a3a;
        }
        .form-card input,
        .form-card textarea {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 2px solid #e2e0da;
            border-radius: 10px;
            font-size: 1rem;
            font-family: inherit;
            background: #fff;
            transition: border-color 0.25s;
        }
        .form-card input:focus,
        .form-card textarea:focus {
            border-color: #1a6d7a;
            outline: none;
            box-shadow: 0 0 0 3px rgba(26, 109, 122, 0.1);
        }
        .form-card textarea {
            min-height: 100px;
            resize: vertical;
        }
        .form-card button {
            align-self: flex-start;
            background: #1a6d7a;
            color: #fff;
            border: none;
            padding: 0.7rem 2rem;
            border-radius: 60px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .form-card button:hover {
            background: #0e4a56;
            transform: translateY(-1px);
        }
        .form-card .hint {
            font-size: 0.85rem;
            color: #5f6b7a;
        }
        .comment-demo {
            margin: 1.2rem 0;
            padding: 0;
            list-style: none;
        }
        .comment-demo li {
            background: #fff;
            border: 1px solid #edebe6;
            border-radius: 12px;
            padding: 1rem 1.4rem;
            margin-bottom: 0.8rem;
        }
        .comment-demo .author {
            font-weight: 600;
            color: #0f2a36;
        }
        .comment-demo .date {
            font-size: 0.8rem;
            color: #8f9aa8;
            margin-left: 0.6rem;
        }
        .comment-demo .text {
            margin-top: 0.3rem;
        }
        footer {
            background: #1e2a3a;
            color: #dce4e8;
            border-radius: 20px 20px 0 0;
            padding: 2.4rem 2rem 1.6rem;
            margin-top: 3rem;
        }
        footer .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 1.5rem 2rem;
            max-width: 1200px;
            margin: 0 auto;
        }
        footer h4 {
            color: #ecf3f0;
            margin-top: 0;
            font-weight: 600;
            border-left: 4px solid #2b8c9c;
            padding-left: 0.8rem;
        }
        footer a {
            color: #b6cfd6;
        }
        footer a:hover {
            color: #e6f0f0;
        }
        friend-link {
            display: block;
            margin-top: 0.6rem;
        }
        friend-link a {
            display: inline-block;
            margin-right: 1.2rem;
            margin-bottom: 0.3rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.8rem;
            margin-top: 1.8rem;
            border-top: 1px solid #2f4050;
            font-size: 0.85rem;
            color: #9aabb6;
        }
        .copyright a {
            color: #b6cfd6;
        }
        @media (max-width: 480px) {
            .header-top {
                flex-direction: row;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .hero {
                padding: 1rem;
            }
            .form-card {
                padding: 1.2rem;
            }
            footer {
                padding: 1.6rem 1rem 1rem;
            }
        }
        .text-center {
            text-align: center;
        }
        .mt-1 {
            margin-top: 1rem;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }
        .flex-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            align-items: center;
        }
        .badge {
            display: inline-block;
            background: #e2e8e4;
            color: #1e2a3a;
            padding: 0.15rem 0.8rem;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 500;
        }
        .skip-link {
            position: absolute;
            top: -100%;
            left: 1rem;
            background: #1a6d7a;
            color: #fff;
            padding: 0.5rem 1.2rem;
            border-radius: 0 0 8px 8px;
            z-index: 1000;
            font-weight: 600;
        }
        .skip-link:focus {
            top: 0;
        }
        .shimmer {
            background: linear-gradient(90deg, #f0ede8 25%, #e8e4de 50%, #f0ede8 75%);
            background-size: 200% 100%;
            animation: shimmer 1.8s infinite;
        }
        @keyframes shimmer {
            0% {
                background-position: 200% 0;
            }
            100% {
                background-position: -200% 0;
            }
        }