*,
        *::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: #f5f7fb;
            color: #1e1e2f;
            line-height: 1.75;
            padding: 0 1rem;
            max-width: 1200px;
            margin: 0 auto;
        }
        a {
            color: #2563eb;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover,
        a:focus {
            color: #1e40af;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin-bottom: 1.2rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: #0f172a;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
        }
        h1 {
            font-size: 2.4rem;
            margin-top: 0.5rem;
        }
        h2 {
            font-size: 1.9rem;
            border-bottom: 3px solid #2563eb;
            padding-bottom: 0.4rem;
        }
        h3 {
            font-size: 1.5rem;
            color: #1e293b;
        }
        h4 {
            font-size: 1.2rem;
            color: #334155;
        }
        p {
            margin-bottom: 1.2rem;
        }
        strong {
            color: #0f172a;
        }
        .container {
            background: #ffffff;
            border-radius: 24px;
            padding: 1.8rem 2rem;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
            margin: 1.5rem 0 2.5rem;
        }
        .badge {
            display: inline-block;
            background: #2563eb;
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.2rem 0.8rem;
            border-radius: 30px;
            letter-spacing: 0.3px;
        }
        header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 1.2rem 0 0.6rem;
            border-bottom: 2px solid #e2e8f0;
            position: relative;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            background: linear-gradient(135deg, #2563eb, #7c3aed);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }
        .my-logo i {
            -webkit-text-fill-color: #2563eb;
            font-size: 1.8rem;
        }
        .my-logo:hover {
            opacity: 0.85;
        }
        nav {
            display: flex;
            align-items: center;
            gap: 0.2rem;
            flex-wrap: wrap;
        }
        nav a {
            padding: 0.5rem 0.9rem;
            font-weight: 500;
            font-size: 0.95rem;
            border-radius: 40px;
            transition: background 0.2s, color 0.2s;
            color: #1e293b;
        }
        nav a:hover {
            background: #eef2ff;
            color: #2563eb;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            cursor: pointer;
            color: #1e293b;
            padding: 0.2rem 0.5rem;
        }
        #navToggle {
            display: none;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.4rem 0.6rem;
            font-size: 0.9rem;
            padding: 0.8rem 0 0.2rem;
            color: #64748b;
        }
        .breadcrumb a {
            color: #2563eb;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: #94a3b8;
        }
        .search-form {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            margin: 1.8rem 0 1rem;
            background: #f1f5f9;
            padding: 1rem 1.4rem;
            border-radius: 60px;
            align-items: center;
        }
        .search-form label {
            font-weight: 600;
            font-size: 0.95rem;
            color: #1e293b;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .search-form input[type="text"] {
            flex: 1;
            min-width: 180px;
            padding: 0.7rem 1.2rem;
            border: 2px solid #e2e8f0;
            border-radius: 40px;
            font-size: 1rem;
            background: #fff;
            transition: border 0.2s;
        }
        .search-form input[type="text"]:focus {
            border-color: #2563eb;
            outline: none;
        }
        .search-form button {
            background: #2563eb;
            color: #fff;
            border: none;
            padding: 0.7rem 1.8rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.25s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-form button:hover {
            background: #1e40af;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.8rem;
            margin: 2.5rem 0 1.5rem;
        }
        .feedback-card {
            background: #f8fafc;
            border-radius: 20px;
            padding: 1.6rem 1.8rem;
            border: 1px solid #e2e8f0;
        }
        .feedback-card h3 {
            margin-top: 0;
            font-size: 1.3rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
            margin-top: 0.8rem;
        }
        .feedback-card input,
        .feedback-card textarea,
        .feedback-card select {
            padding: 0.7rem 1rem;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            font-size: 0.95rem;
            font-family: inherit;
            background: #fff;
            transition: border 0.2s;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            border-color: #2563eb;
            outline: none;
        }
        .feedback-card textarea {
            min-height: 80px;
            resize: vertical;
        }
        .feedback-card button {
            background: #2563eb;
            color: #fff;
            border: none;
            padding: 0.7rem 1.4rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.25s;
            align-self: flex-start;
        }
        .feedback-card button:hover {
            background: #1e40af;
        }
        .star-rating {
            display: flex;
            gap: 0.3rem;
            font-size: 1.6rem;
            color: #fbbf24;
            cursor: pointer;
        }
        .star-rating i {
            transition: transform 0.15s;
        }
        .star-rating i:hover {
            transform: scale(1.2);
        }
        .featured-image {
            margin: 2rem 0;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
        }
        .featured-image img {
            width: 100%;
            max-height: 480px;
            object-fit: cover;
        }
        .featured-image figcaption {
            padding: 0.6rem 1rem;
            background: #f1f5f9;
            font-size: 0.9rem;
            color: #475569;
            font-style: italic;
        }
        friend-link {
            display: block;
            margin: 2rem 0 1rem;
            padding: 1.2rem 1.6rem;
            background: #f1f5f9;
            border-radius: 20px;
            font-size: 0.95rem;
        }
        friend-link a {
            display: inline-block;
            margin: 0.2rem 0.8rem 0.2rem 0;
            padding: 0.2rem 0;
        }
        friend-link a::after {
            content: " •";
            color: #94a3b8;
            margin-left: 0.6rem;
        }
        friend-link a:last-child::after {
            content: "";
        }
        footer {
            padding: 1.5rem 0 2rem;
            border-top: 2px solid #e2e8f0;
            margin-top: 2rem;
            text-align: center;
            font-size: 0.9rem;
            color: #64748b;
        }
        footer .copyright {
            font-weight: 500;
            margin-top: 0.4rem;
        }
        @media (max-width: 820px) {
            .feedback-grid {
                grid-template-columns: 1fr;
            }
            .container {
                padding: 1.2rem 1.2rem;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.25rem;
            }
        }
        @media (max-width: 680px) {
            .hamburger {
                display: block;
            }
            nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding-top: 0.8rem;
                gap: 0.2rem;
            }
            nav a {
                padding: 0.6rem 1rem;
                border-radius: 12px;
            }
            #navToggle:checked~nav {
                display: flex;
            }
            header {
                padding-bottom: 0.6rem;
            }
            .search-form {
                flex-direction: column;
                align-items: stretch;
                border-radius: 24px;
                padding: 1rem;
            }
            .search-form button {
                justify-content: center;
            }
            .feedback-card {
                padding: 1.2rem;
            }
            .my-logo {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 480px) {
            body {
                padding: 0 0.6rem;
            }
            .container {
                padding: 1rem 0.9rem;
                border-radius: 16px;
            }
            h1 {
                font-size: 1.5rem;
            }
            h2 {
                font-size: 1.3rem;
            }
            h3 {
                font-size: 1.1rem;
            }
            .breadcrumb {
                font-size: 0.8rem;
            }
        }
        .mt-1 {
            margin-top: 0.8rem;
        }
        .mt-2 {
            margin-top: 1.6rem;
        }
        .mb-1 {
            margin-bottom: 0.8rem;
        }
        .mb-2 {
            margin-bottom: 1.6rem;
        }
        .emoji-lg {
            font-size: 1.3rem;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.4rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
        }
        th,
        td {
            padding: 0.7rem 1rem;
            text-align: left;
            border-bottom: 1px solid #e2e8f0;
        }
        th {
            background: #f1f5f9;
            font-weight: 700;
            color: #0f172a;
        }
        tr:hover td {
            background: #f8fafc;
        }
        .kw {
            font-weight: 700;
            color: #2563eb;
        }
        .divider {
            height: 2px;
            background: linear-gradient(90deg, #2563eb, #7c3aed, transparent);
            margin: 2.5rem 0;
            border-radius: 4px;
        }