*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, Arial, sans-serif;
            background: #f5f7fc;
            color: #1a1a2e;
            line-height: 1.8;
            padding: 0 16px;
            max-width: 1280px;
            margin: 0 auto;
        }
        a {
            color: #c0392b;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #e74c3c;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        h1,
        h2,
        h3,
        h4 {
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.01em;
            color: #0b0b1a;
        }
        h1 {
            font-size: 2.4rem;
            margin: 1.2rem 0 0.8rem;
            border-left: 6px solid #c0392b;
            padding-left: 20px;
        }
        h2 {
            font-size: 1.8rem;
            margin: 2.4rem 0 1rem;
            border-bottom: 3px solid #e0e4ef;
            padding-bottom: 8px;
        }
        h3 {
            font-size: 1.35rem;
            margin: 1.8rem 0 0.6rem;
            color: #2c3e50;
        }
        h4 {
            font-size: 1.1rem;
            margin: 1.2rem 0 0.4rem;
            color: #34495e;
        }
        p {
            margin-bottom: 1.2rem;
            color: #2d2d44;
        }
        ul,
        ol {
            margin: 0.8rem 0 1.4rem 1.8rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        strong {
            color: #0b0b1a;
        }
        .container {
            background: #ffffff;
            border-radius: 24px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.05);
            padding: 24px 28px 40px;
            margin: 20px 0 40px;
        }
        .badge {
            display: inline-block;
            background: #c0392b;
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 2px 14px;
            border-radius: 30px;
            letter-spacing: 0.3px;
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 18px 0 10px;
            border-bottom: 2px solid #eaeef5;
            position: relative;
        }
        .my-logo {
            font-size: 1.7rem;
            font-weight: 800;
            background: linear-gradient(145deg, #c0392b, #e67e22);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .my-logo i {
            -webkit-text-fill-color: #c0392b;
            font-size: 1.5rem;
        }
        .my-logo small {
            font-size: 0.7rem;
            font-weight: 400;
            -webkit-text-fill-color: #5a6a7a;
            display: block;
            margin-top: -4px;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 8px 18px;
            flex-wrap: wrap;
            margin: 0;
        }
        .nav-list li a {
            font-weight: 600;
            font-size: 0.95rem;
            padding: 6px 4px;
            color: #1a1a2e;
            border-bottom: 2px solid transparent;
            transition: 0.2s;
        }
        .nav-list li a:hover {
            border-bottom-color: #c0392b;
            color: #c0392b;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: #1a1a2e;
            cursor: pointer;
            padding: 4px 10px;
            border-radius: 8px;
            transition: 0.2s;
        }
        .hamburger:hover {
            background: #f0f2f8;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px 12px;
            font-size: 0.9rem;
            padding: 12px 0 4px;
            color: #6a7a8a;
            list-style: none;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 10px;
            color: #b0b8c8;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #5a6a7a;
        }
        .breadcrumb a:hover {
            color: #c0392b;
        }
        .breadcrumb .active {
            color: #1a1a2e;
            font-weight: 600;
        }
        .search-section {
            margin: 24px 0 10px;
            display: flex;
            justify-content: center;
        }
        .search-form {
            display: flex;
            width: 100%;
            max-width: 600px;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
            border: 1px solid #e0e4ef;
            background: #fff;
        }
        .search-form input {
            flex: 1;
            padding: 14px 22px;
            border: none;
            font-size: 1rem;
            outline: none;
            background: transparent;
            min-width: 0;
        }
        .search-form button {
            background: #c0392b;
            color: #fff;
            border: none;
            padding: 0 28px;
            font-size: 1.1rem;
            cursor: pointer;
            transition: 0.25s;
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
        }
        .search-form button:hover {
            background: #a93226;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            margin: 40px 0 20px;
        }
        .card {
            background: #f9faff;
            border-radius: 20px;
            padding: 24px 28px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
            border: 1px solid #eceff8;
        }
        .card h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
        }
        .card form {
            display: flex;
            flex-direction: column;
            gap: 14px;
            margin-top: 12px;
        }
        .card input,
        .card textarea {
            padding: 12px 16px;
            border: 1px solid #dce2ee;
            border-radius: 12px;
            font-size: 0.95rem;
            background: #fff;
            transition: 0.2s;
            font-family: inherit;
        }
        .card input:focus,
        .card textarea:focus {
            border-color: #c0392b;
            box-shadow: 0 0 0 3px rgba(192, 57, 43, 0.12);
            outline: none;
        }
        .card textarea {
            min-height: 90px;
            resize: vertical;
        }
        .card .btn {
            background: #c0392b;
            color: #fff;
            border: none;
            padding: 12px 20px;
            border-radius: 40px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: 0.25s;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        .card .btn:hover {
            background: #a93226;
            transform: scale(1.01);
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 4px;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 2rem;
            color: #d5dbe8;
            cursor: pointer;
            transition: 0.15s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f1c40f;
        }
        friend-link {
            display: block;
            padding: 20px 0 12px;
            border-top: 2px solid #eaeef5;
            margin-top: 32px;
            font-style: normal;
        }
        friend-link a {
            display: inline-block;
            margin: 4px 16px 4px 0;
            padding: 4px 0;
            font-weight: 500;
        }
        .footer-copy {
            text-align: center;
            padding: 20px 0 28px;
            color: #6a7a8a;
            font-size: 0.9rem;
            border-top: 1px solid #eaeef5;
            margin-top: 10px;
        }
        .footer-copy strong {
            color: #1a1a2e;
        }
        .feature-img {
            margin: 28px 0 24px;
            border-radius: 16px;
            overflow: hidden;
            background: #f0f2f8;
            text-align: center;
        }
        .feature-img figcaption {
            padding: 10px 16px;
            font-size: 0.85rem;
            color: #5a6a7a;
            background: #f8f9fe;
            font-style: italic;
        }
        @media (max-width: 820px) {
            .container {
                padding: 16px 14px 30px;
            }
            h1 {
                font-size: 1.8rem;
                padding-left: 14px;
            }
            h2 {
                font-size: 1.4rem;
            }
            .feedback-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .site-header {
                flex-wrap: wrap;
            }
            .nav-list {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 4px;
                padding: 12px 0 6px;
                border-top: 1px solid #eaeef5;
                margin-top: 8px;
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list li a {
                display: block;
                padding: 10px 8px;
                border-radius: 8px;
            }
            .nav-list li a:hover {
                background: #f0f2f8;
            }
            .hamburger {
                display: inline-block;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .search-form button span {
                display: none;
            }
            .search-form button {
                padding: 0 18px;
            }
        }
        @media (max-width: 480px) {
            body {
                padding: 0 8px;
            }
            .container {
                padding: 12px 10px 24px;
                border-radius: 16px;
            }
            h1 {
                font-size: 1.5rem;
            }
            .card {
                padding: 16px 16px;
            }
            .breadcrumb {
                font-size: 0.8rem;
                gap: 4px 8px;
            }
        }
        .divider {
            height: 2px;
            background: linear-gradient(90deg, transparent, #e0e4ef, transparent);
            margin: 30px 0;
        }
        .highlight-box {
            background: #fcf4f2;
            border-left: 5px solid #c0392b;
            padding: 14px 22px;
            border-radius: 0 12px 12px 0;
            margin: 20px 0;
        }
        .inline-icon {
            margin-right: 6px;
            color: #c0392b;
        }
        .last-updated {
            font-size: 0.9rem;
            color: #7a8a9a;
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
            margin: 10px 0 18px;
        }
        .toc {
            background: #f8f9fe;
            padding: 16px 22px 18px;
            border-radius: 16px;
            margin: 20px 0 28px;
            border: 1px solid #e8ecf6;
        }
        .toc summary {
            font-weight: 700;
            font-size: 1.1rem;
            cursor: pointer;
            color: #1a1a2e;
        }
        .toc ol {
            margin: 12px 0 0 22px;
        }
        .toc ol li {
            margin-bottom: 4px;
        }
        .toc ol li a {
            color: #2c3e50;
        }