*,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: #f5f7fb;
            color: #1a202c;
            line-height: 1.75;
            overflow-x: hidden;
        }
        .site-header {
            background: linear-gradient(135deg, #0c1b3a 0%, #1a3a5f 100%);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-inner {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            color: #fff;
            text-decoration: none;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: #fbbf24;
            font-size: 1.8rem;
        }
        .my-logo span {
            font-size: 0.9rem;
            font-weight: 400;
            color: #a0aec0;
            display: block;
            line-height: 1.2;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 24px;
            list-style: none;
        }
        .nav-menu a {
            color: #e2e8f0;
            text-decoration: none;
            font-size: 0.95rem;
            font-weight: 500;
            transition: color 0.3s;
            padding: 6px 12px;
            border-radius: 6px;
        }
        .nav-menu a:hover,
        .nav-menu a.active {
            color: #fbbf24;
            background: rgba(255, 255, 255, 0.08);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 4px;
        }
        .breadcrumb-wrap {
            max-width: 1280px;
            margin: 0 auto;
            padding: 14px 20px;
            background: transparent;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: #718096;
            list-style: none;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 8px;
            color: #a0aec0;
        }
        .breadcrumb a {
            color: #4299e1;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb .current {
            color: #4a5568;
            font-weight: 600;
        }
        .hero {
            background: linear-gradient(180deg, #1a3a5f 0%, #0c1b3a 100%);
            color: #fff;
            padding: 48px 20px 80px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .hero::after {
            content: "";
            position: absolute;
            bottom: -40px;
            left: 50%;
            transform: translateX(-50%);
            width: 120%;
            height: 40px;
            background: #f5f7fb;
            border-radius: 50% 50% 0 0;
        }
        .hero h1 {
            font-size: clamp(1.8rem, 4vw, 3rem);
            font-weight: 800;
            margin-bottom: 16px;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.3;
        }
        .hero h1 span {
            color: #fbbf24;
        }
        .hero p {
            max-width: 700px;
            margin: 0 auto 24px;
            font-size: 1.05rem;
            color: #cbd5e0;
            line-height: 1.8;
        }
        .hero-meta {
            display: flex;
            justify-content: center;
            gap: 30px;
            flex-wrap: wrap;
            font-size: 0.9rem;
            color: #a0aec0;
        }
        .hero-meta i {
            color: #fbbf24;
            margin-right: 6px;
        }
        .main-wrap {
            max-width: 1280px;
            margin: 0 auto;
            padding: 40px 20px;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .content-article {
            min-width: 0;
            background: #fff;
            border-radius: 16px;
            padding: 40px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 16px;
            padding: 24px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-bottom: 16px;
            color: #1a202c;
            border-bottom: 2px solid #fbbf24;
            padding-bottom: 8px;
        }
        .sidebar-card ul {
            list-style: none;
        }
        .sidebar-card ul li {
            margin-bottom: 10px;
        }
        .sidebar-card ul a {
            color: #4299e1;
            text-decoration: none;
            font-size: 0.9rem;
            transition: color 0.2s;
        }
        .sidebar-card ul a:hover {
            color: #2b6cb0;
            text-decoration: underline;
        }
        .content-article h2 {
            font-size: 1.7rem;
            font-weight: 700;
            color: #1a202c;
            margin: 48px 0 20px;
            padding-bottom: 10px;
            border-bottom: 3px solid #fbbf24;
            position: relative;
        }
        .content-article h2::after {
            content: "";
            position: absolute;
            bottom: -3px;
            left: 0;
            width: 60px;
            height: 3px;
            background: #1a3a5f;
        }
        .content-article h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: #2d3748;
            margin: 32px 0 14px;
        }
        .content-article h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: #4a5568;
            margin: 24px 0 10px;
        }
        .content-article p {
            margin-bottom: 16px;
            font-size: 1rem;
            line-height: 1.9;
            color: #2d3748;
        }
        .content-article ul,
        .content-article ol {
            margin: 16px 0 20px 28px;
        }
        .content-article li {
            margin-bottom: 8px;
            font-size: 0.98rem;
            line-height: 1.8;
        }
        .content-article strong {
            color: #1a3a5f;
            font-weight: 700;
        }
        .content-article em {
            font-style: italic;
            color: #4a5568;
        }
        .content-article img {
            max-width: 100%;
            border-radius: 12px;
            margin: 24px 0;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        }
        .img-caption {
            text-align: center;
            font-size: 0.85rem;
            color: #718096;
            margin: -18px 0 24px;
        }
        .highlight-box {
            background: #ebf8ff;
            border-left: 4px solid #4299e1;
            padding: 20px 24px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
        }
        .alert-box {
            background: #fffaf0;
            border-left: 4px solid #ed8936;
            padding: 20px 24px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 24px 0;
            border-radius: 12px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.93rem;
            background: #fff;
        }
        table th {
            background: #1a3a5f;
            color: #fff;
            padding: 14px 16px;
            text-align: left;
            font-weight: 600;
        }
        table td {
            padding: 12px 16px;
            border-bottom: 1px solid #e2e8f0;
            color: #2d3748;
        }
        table tr:nth-child(even) {
            background: #f7fafc;
        }
        blockquote {
            border-left: 4px solid #fbbf24;
            background: #fffff8;
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 12px 12px 0;
            font-style: italic;
            color: #4a5568;
        }
        .interaction-section {
            margin-top: 48px;
            border-top: 2px solid #edf2f7;
            padding-top: 32px;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 20px;
            margin-top: 20px;
        }
        .interaction-card {
            background: #f7fafc;
            border-radius: 12px;
            padding: 24px;
            text-align: center;
            border: 1px solid #e2e8f0;
        }
        .interaction-card i {
            font-size: 2rem;
            color: #1a3a5f;
            margin-bottom: 12px;
        }
        .interaction-card h3 {
            font-size: 1rem;
            margin-bottom: 12px;
            border: none;
        }
        .interaction-card form {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .interaction-card input,
        .interaction-card textarea,
        .interaction-card select {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid #cbd5e0;
            border-radius: 8px;
            font-size: 0.9rem;
            font-family: inherit;
            background: #fff;
        }
        .interaction-card textarea {
            min-height: 80px;
            resize: vertical;
        }
        .interaction-card button,
        .btn-submit {
            background: #1a3a5f;
            color: #fff;
            border: none;
            padding: 10px 20px;
            border-radius: 8px;
            cursor: pointer;
            font-size: 0.9rem;
            font-weight: 600;
            transition: background 0.3s;
        }
        .interaction-card button:hover,
        .btn-submit:hover {
            background: #2c5282;
        }
        .star-input {
            display: flex;
            flex-direction: row-reverse;
            justify-content: center;
            gap: 4px;
            font-size: 1.5rem;
            margin: 10px 0;
        }
        .star-input input {
            display: none;
        }
        .star-input label {
            cursor: pointer;
            color: #cbd5e0;
            transition: color 0.2s;
        }
        .star-input input:checked~label,
        .star-input input:checked+label {
            color: #fbbf24;
        }
        .star-input:hover label:hover~label,
        .star-input:hover label:hover {
            color: #fbbf24;
        }
        friend-link {
            display: block;
            max-width: 1280px;
            margin: 0 auto;
            padding: 24px 20px;
            background: #fff;
            border-radius: 16px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
            margin-bottom: 20px;
        }
        friend-link h3 {
            font-size: 1.1rem;
            color: #1a202c;
            border-bottom: 2px solid #fbbf24;
            padding-bottom: 8px;
            margin-bottom: 16px;
        }
        friend-link ul {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            list-style: none;
        }
        friend-link a {
            color: #4299e1;
            text-decoration: none;
            font-size: 0.9rem;
        }
        friend-link a:hover {
            text-decoration: underline;
        }
        .site-footer {
            background: #0c1b3a;
            color: #a0aec0;
            padding: 40px 20px 20px;
            margin-top: 40px;
        }
        .footer-inner {
            max-width: 1280px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 32px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 14px;
            font-weight: 700;
        }
        .footer-col p {
            font-size: 0.85rem;
            line-height: 1.8;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul a {
            color: #a0aec0;
            text-decoration: none;
            font-size: 0.85rem;
        }
        .footer-col ul a:hover {
            color: #fbbf24;
        }
        .footer-bottom {
            max-width: 1280px;
            margin: 0 auto;
            border-top: 1px solid #1a3a5f;
            padding-top: 20px;
            margin-top: 32px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            font-size: 0.82rem;
        }
        @media (max-width: 1024px) {
            .main-wrap {
                grid-template-columns: 1fr;
            }
            .sidebar {
                order: 2;
            }
            .content-article {
                padding: 28px;
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                height: auto;
                padding: 12px 16px;
                flex-wrap: wrap;
                gap: 8px;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                padding: 12px 0;
                gap: 4px;
                border-top: 1px solid rgba(255, 255, 255, 0.1);
            }
            .nav-menu.show {
                display: flex;
            }
            .nav-menu a {
                padding: 12px;
                display: block;
                width: 100%;
                text-align: center;
            }
            .hamburger {
                display: block;
            }
            .content-article {
                padding: 20px;
                border-radius: 8px;
            }
            .hero {
                padding: 32px 16px 60px;
            }
            .hero h1 {
                font-size: 1.5rem;
            }
            .content-article h2 {
                font-size: 1.35rem;
            }
            .content-article h3 {
                font-size: 1.1rem;
            }
            .breadcrumb-wrap {
                padding: 10px 16px;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 480px) {
            .my-logo {
                font-size: 1.3rem;
            }
            .interaction-grid {
                grid-template-columns: 1fr;
            }
            .table-wrap table {
                font-size: 0.8rem;
            }
        }
        @media print {
            .site-header,
            .site-footer,
            .sidebar,
            .breadcrumb-wrap {
                display: none !important;
            }
            .main-wrap {
                display: block;
            }
            .content-article {
                box-shadow: none;
                padding: 0;
            }
        }