*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: #f4f7fb;
            color: #1a2634;
            line-height: 1.7;
            padding: 0 1rem;
        }
        a {
            color: #1e6f9f;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #0b3b5c;
            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;
            color: #0a1e2f;
        }
        h1 {
            font-size: 2.4rem;
            margin-bottom: 0.75rem;
        }
        h2 {
            font-size: 1.8rem;
            margin-top: 2.5rem;
            margin-bottom: 0.75rem;
            border-left: 5px solid #1e6f9f;
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.35rem;
            margin-top: 1.8rem;
            margin-bottom: 0.5rem;
        }
        h4 {
            font-size: 1.1rem;
            margin-top: 1.2rem;
            margin-bottom: 0.3rem;
        }
        p {
            margin-bottom: 1.1rem;
        }
        ul,
        ol {
            margin: 0.5rem 0 1.2rem 1.8rem;
        }
        li {
            margin-bottom: 0.3rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: #ffffff;
            border-radius: 20px;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
            padding: 1.5rem 2rem 2rem;
        }
        .highlight {
            background: #eef6ff;
            padding: 0.1rem 0.4rem;
            border-radius: 6px;
            font-weight: 600;
        }
        .emoji-lg {
            font-size: 1.4rem;
        }
        .badge {
            display: inline-block;
            background: #1e6f9f;
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.2rem 0.8rem;
            border-radius: 20px;
            letter-spacing: 0.3px;
            margin-right: 0.3rem;
        }
        .badge-gold {
            background: #d4a017;
        }
        .badge-green {
            background: #1f8b4c;
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 0 0.5rem;
            border-bottom: 2px solid #e2e8f0;
            position: relative;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #0b3b5c, #1e6f9f);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }
        .my-logo i {
            -webkit-text-fill-color: #1e6f9f;
            font-size: 1.6rem;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 1.2rem;
            flex-wrap: wrap;
        }
        .main-nav a {
            font-weight: 500;
            padding: 0.3rem 0;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s;
        }
        .main-nav a:hover {
            border-bottom-color: #1e6f9f;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.2rem 0.5rem;
            color: #1a2634;
        }
        .nav-overlay {
            display: none;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0.8rem 0 0.2rem;
            font-size: 0.9rem;
            color: #5a6a7a;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin: 0 0.6rem;
            color: #9aaebb;
        }
        .breadcrumb a {
            color: #1e6f9f;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .search-box {
            display: flex;
            max-width: 480px;
            margin: 1.5rem 0 0.5rem;
            border-radius: 40px;
            overflow: hidden;
            border: 1px solid #d0d9e6;
            background: #fff;
            transition: box-shadow 0.2s;
        }
        .search-box:focus-within {
            box-shadow: 0 0 0 3px rgba(30, 111, 159, 0.2);
            border-color: #1e6f9f;
        }
        .search-box input {
            flex: 1;
            border: none;
            padding: 0.75rem 1.2rem;
            font-size: 1rem;
            outline: none;
            background: transparent;
        }
        .search-box button {
            background: #1e6f9f;
            color: #fff;
            border: none;
            padding: 0.75rem 1.4rem;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.2s;
        }
        .search-box button:hover {
            background: #0b3b5c;
        }
        .feature-figure {
            margin: 1.8rem 0 2rem;
            border-radius: 16px;
            overflow: hidden;
            background: #eef3f9;
        }
        .feature-figure img {
            width: 100%;
            max-height: 480px;
            object-fit: cover;
        }
        .feature-figure figcaption {
            padding: 0.6rem 1rem;
            font-size: 0.9rem;
            color: #3a4a5a;
            background: #eef3f9;
            font-style: italic;
        }
        .feedback-section {
            background: #f9fcff;
            border-radius: 18px;
            padding: 1.8rem 2rem;
            margin: 2.5rem 0 1.5rem;
            border: 1px solid #e2e8f0;
        }
        .feedback-section h3 {
            margin-top: 0;
        }
        .form-row {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 1rem;
        }
        .form-row input,
        .form-row textarea,
        .form-row select {
            flex: 1 1 200px;
            padding: 0.7rem 1rem;
            border: 1px solid #d0d9e6;
            border-radius: 10px;
            font-size: 0.95rem;
            background: #fff;
            transition: border-color 0.2s;
        }
        .form-row textarea {
            min-height: 90px;
            flex-basis: 100%;
        }
        .form-row input:focus,
        .form-row textarea:focus,
        .form-row select:focus {
            border-color: #1e6f9f;
            outline: none;
            box-shadow: 0 0 0 3px rgba(30, 111, 159, 0.1);
        }
        .btn-primary {
            background: #1e6f9f;
            color: #fff;
            border: none;
            padding: 0.7rem 2rem;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            font-size: 1rem;
        }
        .btn-primary:hover {
            background: #0b3b5c;
            transform: scale(1.01);
        }
        .btn-secondary {
            background: #e2e8f0;
            color: #1a2634;
            border: none;
            padding: 0.7rem 1.8rem;
            border-radius: 40px;
            font-weight: 500;
            cursor: pointer;
            transition: background 0.2s;
        }
        .btn-secondary:hover {
            background: #cbd5e1;
        }
        .rating-stars {
            display: flex;
            gap: 0.3rem;
            font-size: 1.6rem;
            color: #d4a017;
            cursor: pointer;
        }
        .rating-stars i {
            transition: transform 0.15s;
        }
        .rating-stars i:hover {
            transform: scale(1.2);
        }
        .site-footer {
            border-top: 2px solid #e2e8f0;
            padding: 2rem 0 1rem;
            margin-top: 2.5rem;
            font-size: 0.95rem;
        }
        .footer-flex {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 1.5rem;
        }
        friend-link {
            display: block;
            font-weight: 500;
            margin: 0.3rem 0;
        }
        friend-link a {
            color: #1e6f9f;
        }
        friend-link a:hover {
            text-decoration: underline;
        }
        .copyright {
            color: #5a6a7a;
            font-size: 0.85rem;
            text-align: center;
            padding-top: 1.2rem;
            border-top: 1px solid #e8edf4;
            margin-top: 1.2rem;
        }
        @media (max-width: 768px) {
            .container {
                padding: 1rem 1rem 1.5rem;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            .site-header {
                flex-wrap: wrap;
            }
            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                gap: 0.3rem;
                padding: 0.8rem 0 0.2rem;
                background: #fff;
                border-top: 1px solid #e2e8f0;
                margin-top: 0.5rem;
            }
            .main-nav.show {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .nav-overlay.show {
                display: block;
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background: rgba(0, 0, 0, 0.2);
                z-index: 9;
            }
            .feedback-section {
                padding: 1.2rem;
            }
            .form-row {
                flex-direction: column;
            }
            .form-row input,
            .form-row textarea,
            .form-row select {
                flex-basis: auto;
                width: 100%;
            }
            .footer-flex {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 480px) {
            .my-logo {
                font-size: 1.4rem;
            }
            .search-box input {
                padding: 0.55rem 0.8rem;
                font-size: 0.9rem;
            }
            .search-box button {
                padding: 0.55rem 1rem;
            }
            .rating-stars {
                font-size: 1.3rem;
            }
        }
        .mt-1 {
            margin-top: 1rem;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }
        .flex-between {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
        }
        .gap-1 {
            gap: 1rem;
        }
        .text-small {
            font-size: 0.9rem;
            color: #5a6a7a;
        }
        .updated-badge {
            background: #e6f0f9;
            padding: 0.3rem 1rem;
            border-radius: 30px;
            font-size: 0.85rem;
            display: inline-block;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
        }
        th,
        td {
            padding: 0.6rem 0.8rem;
            border: 1px solid #dce3ed;
            text-align: left;
        }
        th {
            background: #eef3f9;
            font-weight: 600;
        }
        .blockquote {
            background: #f1f7fe;
            border-left: 4px solid #1e6f9f;
            padding: 0.8rem 1.4rem;
            margin: 1.2rem 0;
            border-radius: 0 12px 12px 0;
            font-style: italic;
        }
        .blockquote .attribution {
            font-style: normal;
            font-weight: 600;
            margin-top: 0.3rem;
            color: #1e6f9f;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
            margin: 1.2rem 0;
        }
        @media (max-width: 600px) {
            .grid-2 {
                grid-template-columns: 1fr;
            }
        }
        .stat-card {
            background: #f4f9ff;
            border-radius: 14px;
            padding: 1.2rem 1.4rem;
            border: 1px solid #dfe8f2;
        }
        .stat-card .stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: #1e6f9f;
        }