*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: #f7f9fc;
            color: #1a2634;
            line-height: 1.7;
            padding: 0 16px;
        }
        a {
            color: #0f6cbf;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #084a8a;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: #0b1a2a;
        }
        p {
            margin-bottom: 1.2rem;
        }
        ul,
        ol {
            margin: 0 0 1.5rem 1.8rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: #fff;
            border-radius: 24px;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
            padding: 20px 28px 40px;
            margin-top: 20px;
            margin-bottom: 40px;
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0 12px;
            border-bottom: 2px solid #e9edf2;
            position: relative;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #0f6cbf, #6b3fa0);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-block;
            transition: transform 0.25s ease;
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
        }
        .my-logo small {
            font-size: 0.9rem;
            font-weight: 400;
            -webkit-text-fill-color: #5a6a7a;
            color: #5a6a7a;
            letter-spacing: 0;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 6px;
            margin: 0;
            padding: 0;
            flex-wrap: wrap;
        }
        .nav-list li a {
            display: block;
            padding: 8px 16px;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 500;
            color: #1a2a3a;
            transition: background 0.2s, color 0.2s;
        }
        .nav-list li a:hover {
            background: #0f6cbf;
            color: #fff;
            text-decoration: none;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: #1a2a3a;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: #e9edf2;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 10px 0 6px;
            margin: 0 0 12px 0;
            font-size: 0.85rem;
            color: #5a6a7a;
        }
        .breadcrumb li+li::before {
            content: "›";
            padding: 0 8px;
            color: #9aa9b9;
        }
        .breadcrumb a {
            color: #0f6cbf;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb .current {
            color: #2c3e50;
            font-weight: 500;
        }
        .content h1 {
            font-size: 2.6rem;
            margin: 0.5rem 0 1.2rem;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, #0b1a2a, #2c5f8a);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .content h2 {
            font-size: 2rem;
            margin: 2.5rem 0 1rem;
            padding-bottom: 8px;
            border-bottom: 3px solid #e9edf2;
        }
        .content h3 {
            font-size: 1.5rem;
            margin: 2rem 0 0.8rem;
        }
        .content h4 {
            font-size: 1.2rem;
            margin: 1.4rem 0 0.6rem;
            color: #2c5f8a;
        }
        .content .emoji {
            font-size: 1.2em;
            margin-right: 4px;
        }
        .content .highlight {
            background: #f0f7ff;
            padding: 0.2rem 0.6rem;
            border-radius: 6px;
            font-weight: 600;
            color: #0f6cbf;
        }
        .feature-image {
            border-radius: 20px;
            margin: 2rem 0 2.5rem;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            overflow: hidden;
        }
        .feature-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        .feature-image figcaption {
            padding: 12px 20px;
            background: #f0f4f9;
            font-size: 0.9rem;
            color: #3d5060;
            text-align: center;
        }
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
            margin: 2rem 0;
        }
        .card {
            background: #f8faff;
            border-radius: 18px;
            padding: 24px 20px;
            border: 1px solid #e4eaf0;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(15, 108, 191, 0.08);
        }
        .card i {
            font-size: 2rem;
            color: #0f6cbf;
            margin-bottom: 12px;
        }
        .card h4 {
            margin: 0 0 8px;
        }
        .link-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 16px;
            list-style: none;
            margin: 0.8rem 0 1.8rem;
            padding: 0;
        }
        .link-list li a {
            background: #f0f4f9;
            padding: 6px 16px;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 500;
            color: #1a2a3a;
            transition: all 0.2s;
            display: inline-block;
        }
        .link-list li a:hover {
            background: #0f6cbf;
            color: #fff;
            text-decoration: none;
        }
        .form-section {
            background: #f8faff;
            border-radius: 20px;
            padding: 28px 30px;
            margin: 2.8rem 0;
            border: 1px solid #e4eaf0;
        }
        .form-section h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 4px;
            font-size: 0.95rem;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 16px;
            border: 1.5px solid #d4dde8;
            border-radius: 12px;
            font-size: 1rem;
            font-family: inherit;
            background: #fff;
            transition: border 0.2s, box-shadow 0.2s;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: #0f6cbf;
            box-shadow: 0 0 0 4px rgba(15, 108, 191, 0.1);
        }
        .form-group textarea {
            resize: vertical;
            min-height: 100px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: #0f6cbf;
            color: #fff;
            border: none;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
        }
        .btn:hover {
            background: #084a8a;
            transform: translateY(-1px);
        }
        .btn:active {
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            border: 2px solid #0f6cbf;
            color: #0f6cbf;
        }
        .btn-outline:hover {
            background: #0f6cbf;
            color: #fff;
        }
        .star-rating {
            display: flex;
            gap: 6px;
            font-size: 2rem;
            cursor: pointer;
            direction: rtl;
            flex-direction: row-reverse;
            justify-content: flex-end;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            color: #d4dde8;
            transition: color 0.2s, transform 0.1s;
            cursor: pointer;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f5b342;
        }
        .star-rating label:hover {
            transform: scale(1.15);
        }
        .site-footer {
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 2px solid #e9edf2;
            font-size: 0.95rem;
            color: #3d5060;
        }
        .site-footer friend-link {
            display: block;
            margin: 0.8rem 0 1.2rem;
            padding: 12px 16px;
            background: #f0f4f9;
            border-radius: 14px;
            font-weight: 500;
        }
        .site-footer friend-link a {
            display: inline-block;
            margin: 0 12px 4px 0;
            padding: 4px 12px;
            background: #fff;
            border-radius: 30px;
            font-size: 0.9rem;
            transition: background 0.2s;
        }
        .site-footer friend-link a:hover {
            background: #0f6cbf;
            color: #fff;
            text-decoration: none;
        }
        .copyright {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0 0.4rem;
            font-size: 0.85rem;
            color: #5a6a7a;
        }
        @media (max-width: 768px) {
            body {
                padding: 0 10px;
            }
            .container {
                padding: 12px 16px 30px;
                border-radius: 16px;
                margin-top: 12px;
            }
            .content h1 {
                font-size: 1.9rem;
            }
            .content h2 {
                font-size: 1.6rem;
            }
            .content h3 {
                font-size: 1.3rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #fff;
                border-radius: 16px;
                padding: 12px 0;
                box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                z-index: 100;
                border: 1px solid #e9edf2;
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list li a {
                padding: 12px 20px;
                border-radius: 0;
            }
            .nav-toggle {
                display: block;
            }
            .breadcrumb {
                font-size: 0.75rem;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .form-section {
                padding: 20px 18px;
            }
            .site-footer friend-link a {
                display: block;
                margin: 4px 0;
            }
            .copyright {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
        }
        @media (min-width: 769px) {
            .nav-toggle {
                display: none !important;
            }
            .nav-list {
                display: flex !important;
            }
        }
        .anchor-offset {
            scroll-margin-top: 24px;
        }
        .text-muted {
            color: #5a6a7a;
        }
        .mt-2 {
            margin-top: 2rem;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }
        .flex-between {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
        }
        .gap-2 {
            gap: 12px;
        }
        .schema-hidden {
            display: none;
        }