*,
        *::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, sans-serif;
            background: #f4f7fb;
            color: #1e2a3a;
            line-height: 1.7;
            padding: 0 16px;
        }
        a {
            color: #0f6c8a;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover {
            color: #b45d2b;
            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 32px rgba(0, 0, 0, 0.05);
            border-radius: 24px;
            padding: 20px 24px 32px;
            margin-top: 16px;
            margin-bottom: 32px;
        }
        .header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 12px 0 16px;
            border-bottom: 2px solid #e6edf4;
            position: relative;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #0b4b6b, #1f7a9e);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            -webkit-text-fill-color: #1f7a9e;
            font-size: 2rem;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
        }
        .nav-bar {
            display: flex;
            align-items: center;
            gap: 8px 20px;
            flex-wrap: wrap;
        }
        .nav-bar a {
            font-weight: 500;
            padding: 6px 12px;
            border-radius: 40px;
            transition: background 0.2s, color 0.2s;
            font-size: 0.95rem;
        }
        .nav-bar a:hover {
            background: #e1eff7;
            color: #0b4b6b;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: #1e2a3a;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 8px;
        }
        .hamburger:hover {
            background: #e6edf4;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px 10px;
            font-size: 0.85rem;
            padding: 10px 0 6px;
            color: #5a6f7e;
            background: #f8fafc;
            border-radius: 12px;
            padding: 8px 16px;
            margin: 6px 0 18px;
        }
        .breadcrumb i {
            font-size: 0.7rem;
            color: #8ba0b0;
        }
        .breadcrumb a {
            color: #0f6c8a;
        }
        .breadcrumb .current {
            color: #2d4a5c;
            font-weight: 600;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin: 0 0 20px 0;
            color: #0a3346;
            letter-spacing: -0.3px;
        }
        h2 {
            font-size: 2rem;
            font-weight: 700;
            margin: 48px 0 16px 0;
            padding-bottom: 8px;
            border-bottom: 3px solid #dbe6ef;
            color: #124b63;
        }
        h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin: 32px 0 12px 0;
            color: #1c5f7a;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
            margin: 24px 0 10px 0;
            color: #2f6f8a;
        }
        p {
            margin: 0 0 18px 0;
            color: #1f3140;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 400;
            color: #2a4b5e;
            background: #f0f6fb;
            padding: 16px 24px;
            border-radius: 16px;
            border-left: 5px solid #1f7a9e;
        }
        .update-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #eaf3fa;
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 0.85rem;
            color: #1f5a72;
            font-weight: 500;
            margin-bottom: 20px;
        }
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
            margin: 28px 0;
        }
        .card {
            background: #fafdff;
            border: 1px solid #e2edf5;
            border-radius: 16px;
            padding: 20px 22px;
            transition: box-shadow 0.3s, transform 0.2s;
        }
        .card:hover {
            box-shadow: 0 12px 28px rgba(0, 40, 60, 0.08);
            transform: translateY(-3px);
        }
        .card i {
            font-size: 2rem;
            color: #1f7a9e;
            margin-bottom: 10px;
        }
        .feature-img {
            margin: 28px 0 32px;
            border-radius: 16px;
            overflow: hidden;
            background: #eaf1f8;
            display: flex;
            justify-content: center;
        }
        .feature-img img {
            width: 100%;
            max-width: 900px;
            object-fit: cover;
        }
        .img-caption {
            font-size: 0.85rem;
            color: #55768a;
            text-align: center;
            margin-top: 6px;
        }
        .form-section {
            background: #f6fafd;
            border-radius: 20px;
            padding: 28px 30px;
            margin: 40px 0 20px;
            border: 1px solid #dce9f2;
        }
        .form-section h3 {
            margin-top: 0;
        }
        .form-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin: 16px 0;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            flex: 1 1 200px;
            padding: 12px 18px;
            border: 1px solid #cddde9;
            border-radius: 12px;
            font-size: 1rem;
            background: white;
            transition: border 0.2s;
            font-family: inherit;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: #1f7a9e;
            box-shadow: 0 0 0 3px rgba(31, 122, 158, 0.15);
        }
        .form-group textarea {
            min-height: 100px;
            flex-basis: 100%;
        }
        .btn {
            background: #1f7a9e;
            color: white;
            border: none;
            padding: 12px 32px;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn:hover {
            background: #0f5f7e;
            transform: scale(1.02);
        }
        .btn-secondary {
            background: #e1eef7;
            color: #124b63;
        }
        .btn-secondary:hover {
            background: #cde0ed;
        }
        .comment-list {
            margin: 20px 0;
        }
        .comment-item {
            padding: 16px 0;
            border-bottom: 1px solid #e2edf5;
        }
        .comment-item:last-child {
            border-bottom: none;
        }
        .comment-author {
            font-weight: 600;
            color: #124b63;
        }
        .comment-meta {
            font-size: 0.8rem;
            color: #6f8b9c;
        }
        .star-rating {
            display: flex;
            gap: 4px;
            font-size: 1.4rem;
            color: #f5b342;
        }
        .star-rating i {
            cursor: pointer;
            transition: transform 0.15s;
        }
        .star-rating i:hover {
            transform: scale(1.2);
        }
        friend-link {
            display: block;
            background: #f0f6fb;
            border-radius: 16px;
            padding: 20px 24px;
            margin: 36px 0 12px;
        }
        friend-link a {
            display: inline-block;
            margin: 4px 16px 4px 0;
            padding: 4px 10px;
            border-radius: 20px;
            background: #e1edf6;
            font-weight: 500;
            font-size: 0.9rem;
        }
        friend-link a:hover {
            background: #cde0ed;
            text-decoration: none;
        }
        .footer {
            border-top: 2px solid #e6edf4;
            padding-top: 24px;
            margin-top: 32px;
            text-align: center;
            font-size: 0.9rem;
            color: #4d6b7d;
        }
        .footer .copyright {
            font-weight: 400;
            letter-spacing: 0.3px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 16px 16px 24px;
                border-radius: 16px;
            }
            h1 {
                font-size: 1.9rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            h3 {
                font-size: 1.25rem;
            }
            .header {
                flex-wrap: wrap;
            }
            .nav-bar {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding-top: 12px;
                gap: 6px;
            }
            .nav-bar.show {
                display: flex;
            }
            .nav-bar a {
                padding: 10px 16px;
                border-radius: 12px;
                background: #f4f9fd;
            }
            .hamburger {
                display: block;
            }
            .breadcrumb {
                font-size: 0.75rem;
                padding: 6px 12px;
            }
            .form-section {
                padding: 20px 16px;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .my-logo {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            body {
                padding: 0 8px;
            }
            .container {
                padding: 12px 12px 20px;
            }
            h1 {
                font-size: 1.6rem;
            }
            .lead {
                font-size: 1rem;
                padding: 12px 16px;
            }
        }
        .scroll-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: #1f7a9e;
            color: white;
            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(0, 40, 60, 0.2);
            transition: background 0.25s, transform 0.2s;
            z-index: 99;
            cursor: pointer;
            border: none;
        }
        .scroll-top:hover {
            background: #0b4b6b;
            transform: translateY(-4px);
        }