*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
            background: #f4f7fb;
            color: #1a2a3a;
            line-height: 1.8;
            padding: 0 16px;
            max-width: 1280px;
            margin: 0 auto;
        }
        a {
            color: #0066c0;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #003d6e;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            margin-top: 0;
            color: #0b1c2c;
        }
        h1 {
            font-size: 2.4rem;
            margin-bottom: 0.75rem;
            letter-spacing: -0.02em;
            border-bottom: 4px solid #0b4f6c;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 1.8rem;
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            border-left: 6px solid #0b4f6c;
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.35rem;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
            color: #1f4a5c;
        }
        h4 {
            font-size: 1.1rem;
            margin-top: 1.5rem;
            margin-bottom: 0.5rem;
            color: #2a5f74;
        }
        p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
        }
        .text-muted {
            color: #5a6a7a;
        }
        .text-small {
            font-size: 0.9rem;
        }
        .fw-bold {
            font-weight: 700;
        }
        .emoji-big {
            font-size: 1.6rem;
            display: inline-block;
            margin-right: 0.3rem;
        }
        header {
            background: linear-gradient(145deg, #ffffff 0%, #eef3f7 100%);
            border-radius: 0 0 24px 24px;
            padding: 16px 24px 12px 24px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
            margin-bottom: 12px;
            position: relative;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            background: linear-gradient(135deg, #0b4f6c 0%, #1f7a8c 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-decoration: none !important;
            display: inline-block;
            padding: 4px 0;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none !important;
        }
        .my-logo small {
            font-size: 0.9rem;
            font-weight: 400;
            background: none;
            -webkit-text-fill-color: #4a6a7a;
            color: #4a6a7a;
            letter-spacing: 0;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list {
            list-style: none;
            display: flex;
            gap: 6px 18px;
            flex-wrap: wrap;
            align-items: center;
        }
        .nav-list li a {
            font-weight: 500;
            padding: 6px 10px;
            border-radius: 30px;
            transition: background 0.2s, color 0.2s;
            font-size: 0.95rem;
            color: #1a3a4a;
        }
        .nav-list li a:hover {
            background: #0b4f6c;
            color: #fff;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px 4px;
        }
        .hamburger span {
            width: 28px;
            height: 3px;
            background: #0b4f6c;
            border-radius: 4px;
            transition: 0.3s;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 10px 0 10px 4px;
            font-size: 0.85rem;
            color: #5a6a7a;
            background: transparent;
            border-radius: 12px;
            margin-bottom: 8px;
        }
        .breadcrumb li+li::before {
            content: "›";
            padding: 0 10px;
            color: #8a9aaa;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #0b4f6c;
        }
        .breadcrumb .active {
            color: #2a5f74;
            font-weight: 600;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 32px;
            margin: 20px 0 40px;
        }
        .main-content {
            background: #fff;
            border-radius: 24px;
            padding: 28px 32px 40px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
        }
        .sidebar {
            background: #fff;
            border-radius: 24px;
            padding: 24px 20px 32px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
            height: fit-content;
            position: sticky;
            top: 20px;
        }
        .img-card {
            margin: 28px 0 32px;
            border-radius: 16px;
            overflow: hidden;
            background: #eef3f7;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
        }
        .img-card img {
            width: 100%;
            height: auto;
            aspect-ratio: 16/9;
            object-fit: cover;
        }
        .img-card .img-caption {
            padding: 12px 18px 14px;
            font-size: 0.9rem;
            color: #3a5a6a;
            font-style: italic;
            background: #f8fafc;
        }
        .sidebar-widget {
            margin-bottom: 28px;
        }
        .sidebar-widget h4 {
            font-size: 1.1rem;
            border-bottom: 2px solid #dce4ec;
            padding-bottom: 8px;
            margin-bottom: 14px;
            color: #0b3a4a;
        }
        .link-list {
            list-style: none;
            padding: 0;
        }
        .link-list li {
            padding: 6px 0;
            border-bottom: 1px solid #eef3f7;
        }
        .link-list li a {
            font-size: 0.95rem;
            display: block;
            padding: 4px 0;
        }
        .form-card {
            background: #f8fafc;
            border-radius: 16px;
            padding: 20px 24px 24px;
            margin: 28px 0 20px;
            border: 1px solid #e4eaf0;
        }
        .form-card h3 {
            margin-top: 0;
            font-size: 1.25rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .form-group {
            margin-bottom: 14px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            font-size: 0.9rem;
            margin-bottom: 4px;
            color: #1a3a4a;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid #cbd5e0;
            border-radius: 10px;
            font-size: 0.95rem;
            background: #fff;
            transition: border 0.2s, box-shadow 0.2s;
            font-family: inherit;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: #0b4f6c;
            box-shadow: 0 0 0 3px rgba(11, 79, 108, 0.12);
        }
        .form-group textarea {
            resize: vertical;
            min-height: 80px;
        }
        .btn {
            display: inline-block;
            padding: 10px 28px;
            background: #0b4f6c;
            color: #fff;
            border: none;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            font-family: inherit;
        }
        .btn:hover {
            background: #083b52;
            transform: scale(1.02);
            color: #fff;
            text-decoration: none;
        }
        .btn-secondary {
            background: #dce4ec;
            color: #1a2a3a;
        }
        .btn-secondary:hover {
            background: #c4d0dc;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 4px;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            color: #cbd5e0;
            transition: color 0.15s;
            cursor: pointer;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f5b342;
        }
        footer {
            background: #0b1c2c;
            color: #c8d8e4;
            border-radius: 24px 24px 0 0;
            padding: 32px 28px 28px;
            margin-top: 40px;
            font-size: 0.9rem;
        }
        footer a {
            color: #7ab8d4;
        }
        footer a:hover {
            color: #b5dff0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 32px;
            max-width: 1200px;
            margin: 0 auto;
        }
        .friend-link {
            display: block;
            padding: 8px 0;
            font-weight: 500;
        }
        .friend-link a {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 20px;
            margin: 3px 6px 3px 0;
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            margin-top: 20px;
            text-align: center;
            font-size: 0.82rem;
            color: #8a9aaa;
        }
        .toc {
            background: #f0f5fa;
            border-radius: 16px;
            padding: 18px 22px 20px;
            margin-bottom: 28px;
            border-left: 4px solid #0b4f6c;
        }
        .toc h3 {
            margin-top: 0;
            font-size: 1.1rem;
        }
        .toc ul {
            list-style: none;
            padding-left: 4px;
            columns: 2;
            column-gap: 24px;
        }
        .toc ul li {
            padding: 3px 0;
            break-inside: avoid;
        }
        .toc ul li a {
            font-size: 0.92rem;
        }
        @media (max-width: 960px) {
            .main-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                order: 2;
            }
            .main-content {
                order: 1;
            }
            .toc ul {
                columns: 1;
            }
        }
        @media (max-width: 720px) {
            body {
                padding: 0 10px;
            }
            header {
                padding: 12px 14px 10px;
                flex-wrap: wrap;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #fff;
                padding: 12px 0 16px;
                border-top: 1px solid #e4eaf0;
                margin-top: 8px;
                gap: 2px;
            }
            .nav-list.open {
                display: flex;
            }
            .hamburger {
                display: flex;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            .main-content {
                padding: 16px 14px 28px;
            }
            .sidebar {
                padding: 16px 14px 24px;
            }
            .form-card {
                padding: 16px 14px 18px;
            }
            footer {
                padding: 24px 16px 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .toc ul {
                columns: 1;
            }
            .breadcrumb {
                font-size: 0.75rem;
            }
            .breadcrumb li+li::before {
                padding: 0 6px;
            }
        }
        @media (max-width: 480px) {
            h1 {
                font-size: 1.4rem;
            }
            h2 {
                font-size: 1.2rem;
                padding-left: 0.6rem;
            }
            .my-logo {
                font-size: 1.2rem;
            }
            .star-rating {
                font-size: 1.4rem;
            }
            .btn {
                padding: 8px 20px;
                font-size: 0.85rem;
            }
        }
        .mt-1 {
            margin-top: 1rem;
        }
        .mt-2 {
            margin-top: 2rem;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }
        .mb-2 {
            margin-bottom: 2rem;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-wrap {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
        }
        .badge {
            display: inline-block;
            background: #0b4f6c;
            color: #fff;
            padding: 2px 12px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.02em;
        }
        .blockquote {
            border-left: 4px solid #0b4f6c;
            padding: 12px 20px;
            margin: 20px 0;
            background: #f4f9fc;
            border-radius: 0 12px 12px 0;
            font-style: italic;
            color: #1a4a5a;
        }
        .highlight-box {
            background: #e6f3f8;
            border-radius: 16px;
            padding: 18px 22px;
            margin: 20px 0;
            border: 1px solid #c8dce8;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 16px;
            margin: 20px 0;
        }
        .stat-item {
            background: #f0f5fa;
            border-radius: 14px;
            padding: 14px 12px;
            text-align: center;
        }
        .stat-item .num {
            font-size: 1.8rem;
            font-weight: 800;
            color: #0b4f6c;
            display: block;
        }
        .stat-item .label {
            font-size: 0.82rem;
            color: #3a5a6a;
        }
        .interview-box {
            background: #f8f4ee;
            border-radius: 18px;
            padding: 20px 24px;
            margin: 24px 0;
            border: 1px solid #e8ddd0;
        }
        .interview-box .q {
            font-weight: 700;
            color: #0b3a4a;
        }
        .interview-box .a {
            margin-bottom: 12px;
            padding-left: 8px;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 20px 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.92rem;
        }
        table th,
        table td {
            padding: 10px 14px;
            border: 1px solid #dce4ec;
            text-align: left;
        }
        table th {
            background: #0b4f6c;
            color: #fff;
            font-weight: 600;
        }
        table tr:nth-child(even) {
            background: #f4f9fc;
        }
        :target {
            scroll-margin-top: 80px;
        }