*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            background: #f5f7fa;
            color: #1e2a3a;
            line-height: 1.7;
            padding: 0 16px;
        }
        a {
            color: #1a6dd4;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #0b3d7a;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: #ffffff;
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.06);
            border-radius: 24px;
            padding: 20px 24px 40px;
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0 12px;
            border-bottom: 2px solid #eef2f6;
            position: relative;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #1a6dd4, #0b3d7a);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo i {
            -webkit-text-fill-color: initial;
            color: #f5a623;
            font-size: 2rem;
        }
        .my-logo a {
            background: none;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }
        .my-logo a:hover {
            text-decoration: none;
        }
        .nav-bar {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 4px;
            flex-wrap: wrap;
        }
        .nav-list li a {
            display: inline-block;
            padding: 8px 16px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            color: #1e2a3a;
            background: transparent;
            transition: background 0.2s, color 0.2s;
        }
        .nav-list li a:hover {
            background: #eef2f6;
            color: #1a6dd4;
            text-decoration: none;
        }
        .nav-list li a.active {
            background: #1a6dd4;
            color: #fff;
        }
        .hamburger {
            display: none;
            font-size: 1.6rem;
            background: none;
            border: none;
            cursor: pointer;
            color: #1e2a3a;
            padding: 4px 12px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: #eef2f6;
        }
        #nav-toggle {
            display: none;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 14px 0 8px;
            font-size: 0.85rem;
            color: #5e6f8d;
        }
        .breadcrumb li+li::before {
            content: "›";
            padding: 0 10px;
            color: #b0c0d4;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #5e6f8d;
        }
        .breadcrumb a:hover {
            color: #1a6dd4;
        }
        .breadcrumb .current {
            color: #1a6dd4;
            font-weight: 600;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin: 24px 0 16px;
            letter-spacing: -0.02em;
            color: #0b1a2e;
        }
        h2 {
            font-size: 1.9rem;
            font-weight: 700;
            margin: 48px 0 16px;
            padding-bottom: 8px;
            border-bottom: 3px solid #eef2f6;
            color: #0b1a2e;
        }
        h3 {
            font-size: 1.4rem;
            font-weight: 600;
            margin: 32px 0 12px;
            color: #1e2a3a;
        }
        h4 {
            font-size: 1.15rem;
            font-weight: 600;
            margin: 24px 0 8px;
            color: #2a3a4e;
        }
        p {
            margin: 0 0 18px;
            color: #2a3a4e;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 400;
            color: #3a4a5e;
            line-height: 1.8;
            margin-bottom: 24px;
        }
        strong {
            color: #0b1a2e;
        }
        .updated {
            display: inline-block;
            background: #eef2f6;
            padding: 4px 16px;
            border-radius: 40px;
            font-size: 0.85rem;
            color: #3a4a5e;
            margin-bottom: 20px;
        }
        .info-box {
            background: #f0f5ff;
            border-left: 5px solid #1a6dd4;
            padding: 20px 24px;
            border-radius: 12px;
            margin: 24px 0;
        }
        .info-box p:last-child {
            margin-bottom: 0;
        }
        .highlight {
            background: #fef9e7;
            border-radius: 12px;
            padding: 16px 20px;
            margin: 16px 0;
        }
        .featured-image {
            margin: 28px 0;
            border-radius: 16px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
        }
        .featured-image figcaption {
            text-align: center;
            font-size: 0.9rem;
            color: #5e6f8d;
            margin-top: 8px;
            font-style: italic;
        }
        .search-block {
            background: #f5f7fa;
            padding: 24px 28px;
            border-radius: 16px;
            margin: 32px 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px;
        }
        .search-block label {
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.05rem;
        }
        .search-block input[type="text"] {
            flex: 1 1 240px;
            padding: 12px 18px;
            border: 2px solid #dce3ec;
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            transition: border 0.2s;
            background: #fff;
        }
        .search-block input[type="text"]:focus {
            border-color: #1a6dd4;
        }
        .search-block button {
            background: #1a6dd4;
            color: #fff;
            border: none;
            padding: 12px 28px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .search-block button:hover {
            background: #0b3d7a;
            transform: scale(1.02);
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            margin: 40px 0 20px;
        }
        .feedback-card {
            background: #f5f7fa;
            border-radius: 16px;
            padding: 24px 28px;
            border: 1px solid #eef2f6;
        }
        .feedback-card h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 14px;
            margin-top: 12px;
        }
        .feedback-card textarea,
        .feedback-card input[type="number"],
        .feedback-card input[type="text"] {
            padding: 12px 16px;
            border: 2px solid #dce3ec;
            border-radius: 12px;
            font-size: 1rem;
            font-family: inherit;
            outline: none;
            transition: border 0.2s;
            background: #fff;
            width: 100%;
        }
        .feedback-card textarea:focus,
        .feedback-card input:focus {
            border-color: #1a6dd4;
        }
        .feedback-card textarea {
            resize: vertical;
            min-height: 100px;
        }
        .feedback-card button {
            background: #1a6dd4;
            color: #fff;
            border: none;
            padding: 12px 24px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            align-self: flex-start;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .feedback-card button:hover {
            background: #0b3d7a;
            transform: scale(1.02);
        }
        .star-rating {
            display: flex;
            gap: 4px;
            font-size: 1.6rem;
            color: #dce3ec;
            cursor: pointer;
        }
        .star-rating i.active {
            color: #f5a623;
        }
        .star-rating i:hover,
        .star-rating i.active~i {
            color: #f5a623;
        }
        .related-links {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 12px;
            list-style: none;
            margin: 20px 0;
            padding: 0;
        }
        .related-links li a {
            background: #f0f5ff;
            padding: 6px 16px;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 500;
            color: #1a6dd4;
            transition: background 0.2s, color 0.2s;
            display: inline-block;
        }
        .related-links li a:hover {
            background: #1a6dd4;
            color: #fff;
            text-decoration: none;
        }
        .site-footer {
            margin-top: 48px;
            padding-top: 28px;
            border-top: 2px solid #eef2f6;
            font-size: 0.9rem;
            color: #5e6f8d;
        }
        .footer-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 24px;
        }
        .footer-copy {
            text-align: center;
            width: 100%;
            padding-top: 16px;
            font-size: 0.85rem;
            color: #7a8a9e;
        }
        friend-link {
            display: block;
            background: #f5f7fa;
            padding: 20px 24px;
            border-radius: 16px;
            margin: 16px 0 8px;
            font-weight: 500;
        }
        friend-link a {
            display: inline-block;
            margin: 4px 16px 4px 0;
            padding: 4px 0;
        }
        friend-link a::before {
            content: "🔗 ";
            font-size: 0.8rem;
        }
        @media (max-width: 768px) {
            body {
                padding: 0 8px;
            }
            .container {
                padding: 12px 14px 32px;
                border-radius: 16px;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.2rem;
            }
            .my-logo {
                font-size: 1.3rem;
            }
            .my-logo i {
                font-size: 1.4rem;
            }
            .hamburger {
                display: inline-block;
            }
            .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #fff;
                border-radius: 16px;
                padding: 12px 0;
                box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
                margin-top: 12px;
            }
            .nav-list li a {
                padding: 12px 20px;
                border-radius: 0;
                width: 100%;
            }
            #nav-toggle:checked~.nav-list {
                display: flex;
            }
            .nav-bar {
                flex-wrap: wrap;
                justify-content: flex-end;
            }
            .feedback-grid {
                grid-template-columns: 1fr;
            }
            .search-block {
                flex-direction: column;
                align-items: stretch;
            }
            .search-block input[type="text"] {
                flex: 1 1 auto;
            }
            .footer-inner {
                flex-direction: column;
                gap: 16px;
            }
            .breadcrumb {
                font-size: 0.75rem;
            }
            .breadcrumb li+li::before {
                padding: 0 6px;
            }
        }
        @media (max-width: 480px) {
            h1 {
                font-size: 1.5rem;
            }
            .container {
                padding: 8px 10px 24px;
            }
            .feedback-card {
                padding: 16px 18px;
            }
            .search-block {
                padding: 16px 18px;
            }
        }
        .back-to-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            background: #1a6dd4;
            color: #fff;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            box-shadow: 0 6px 20px rgba(26, 109, 212, 0.3);
            transition: transform 0.2s, background 0.2s;
            z-index: 99;
        }
        .back-to-top:hover {
            background: #0b3d7a;
            transform: translateY(-4px);
            text-decoration: none;
            color: #fff;
        }
        @media (max-width: 600px) {
            .back-to-top {
                bottom: 16px;
                right: 16px;
                width: 40px;
                height: 40px;
                font-size: 1.1rem;
            }
        }