*,
        *::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, BlinkMacSystemFont, sans-serif;
            background: #f7f9fc;
            color: #1e293b;
            line-height: 1.75;
            padding: 0;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        a {
            color: #1e6f9f;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover,
        a:focus {
            color: #0b3b5c;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin: 0.75rem 0;
        }
        li {
            margin-bottom: 0.4rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }
        .site-header {
            background: linear-gradient(135deg, #0b1a2e 0%, #1a3a5c 100%);
            color: #fff;
            padding: 0.75rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.5rem 1rem;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #facc15;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
            transition: transform 0.2s ease;
            display: inline-block;
        }
        .my-logo:hover {
            transform: scale(1.02);
            color: #fde047;
            text-decoration: none;
        }
        .my-logo i {
            margin-right: 0.3rem;
            color: #f97316;
        }
        .my-logo span {
            font-weight: 300;
            color: #94a3b8;
            font-size: 0.9rem;
            letter-spacing: 0.3px;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            font-size: 1.6rem;
            padding: 0.3rem 0.8rem;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.25s ease;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: #facc15;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            flex-wrap: wrap;
        }
        .nav-menu a {
            color: #e2e8f0;
            padding: 0.5rem 1rem;
            border-radius: 8px;
            font-size: 0.95rem;
            font-weight: 500;
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        .nav-menu a:hover,
        .nav-menu a:focus {
            background: rgba(255, 255, 255, 0.1);
            color: #facc15;
            text-decoration: none;
        }
        .nav-menu a i {
            margin-right: 0.35rem;
            font-size: 0.9rem;
        }
        .breadcrumb-wrap {
            background: #eef2f6;
            padding: 0.6rem 0;
            border-bottom: 1px solid #dce3ec;
            font-size: 0.9rem;
        }
        .breadcrumb-wrap .container {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
        }
        .breadcrumb-wrap a {
            color: #1e6f9f;
        }
        .breadcrumb-wrap a:hover {
            color: #0b3b5c;
        }
        .breadcrumb-wrap .sep {
            color: #94a3b8;
            font-size: 0.75rem;
        }
        .breadcrumb-wrap .current {
            color: #475569;
            font-weight: 600;
        }
        .main-content {
            padding: 2rem 0 3rem;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        @media(max-width:1024px) {
            .main-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
        }
        .article-body h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 0.75rem;
            color: #0b1a2e;
        }
        .article-body h1 i {
            color: #f97316;
            margin-right: 0.5rem;
        }
        .article-body .subhead {
            font-size: 1.1rem;
            color: #475569;
            margin-bottom: 1.5rem;
            border-left: 4px solid #facc15;
            padding-left: 1rem;
        }
        .article-body .meta-line {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem 1.5rem;
            font-size: 0.9rem;
            color: #64748b;
            margin-bottom: 1.75rem;
            padding-bottom: 0.75rem;
            border-bottom: 1px dashed #dce3ec;
        }
        .article-body .meta-line i {
            margin-right: 0.3rem;
            color: #f97316;
        }
        .article-body .last-updated {
            font-weight: 600;
            color: #1e293b;
        }
        .article-body h2 {
            font-size: 1.9rem;
            font-weight: 700;
            margin: 2.2rem 0 0.8rem;
            color: #0f2c42;
            border-bottom: 3px solid #facc15;
            padding-bottom: 0.3rem;
        }
        .article-body h2 i {
            color: #f97316;
            margin-right: 0.5rem;
        }
        .article-body h3 {
            font-size: 1.45rem;
            font-weight: 600;
            margin: 1.6rem 0 0.6rem;
            color: #1a3a5c;
        }
        .article-body h3 i {
            color: #facc15;
            margin-right: 0.4rem;
            font-size: 1.2rem;
        }
        .article-body h4 {
            font-size: 1.15rem;
            font-weight: 600;
            margin: 1.2rem 0 0.4rem;
            color: #2c4a6e;
        }
        .article-body p {
            margin-bottom: 0.9rem;
        }
        .article-body .highlight-box {
            background: #f1f5f9;
            border-left: 5px solid #f97316;
            padding: 1rem 1.5rem;
            border-radius: 0 12px 12px 0;
            margin: 1.2rem 0;
        }
        .article-body .highlight-box strong {
            color: #0b1a2e;
        }
        .article-body .tip-box {
            background: #fef9ec;
            border: 1px solid #fde68a;
            border-radius: 12px;
            padding: 1rem 1.5rem;
            margin: 1.2rem 0;
        }
        .article-body .tip-box i {
            color: #f59e0b;
            margin-right: 0.5rem;
        }
        .featured-img-wrap {
            margin: 1.8rem 0;
            border-radius: 14px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            background: #eef2f6;
            padding: 0.5rem;
        }
        .featured-img-wrap img {
            width: 100%;
            border-radius: 10px;
        }
        .featured-img-wrap figcaption {
            padding: 0.6rem 0.5rem 0.2rem;
            font-size: 0.85rem;
            color: #64748b;
            text-align: center;
            font-style: italic;
        }
        .sidebar {
            background: #fff;
            border-radius: 16px;
            padding: 1.6rem 1.4rem;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
            border: 1px solid #eef2f6;
            align-self: start;
            position: sticky;
            top: 6rem;
        }
        .sidebar h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: #0b1a2e;
            margin-bottom: 1rem;
            border-bottom: 2px solid #facc15;
            padding-bottom: 0.4rem;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar ul li {
            padding: 0.5rem 0;
            border-bottom: 1px solid #f1f5f9;
        }
        .sidebar ul li:last-child {
            border-bottom: none;
        }
        .sidebar ul li a {
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .sidebar ul li a::before {
            content: "▸";
            color: #f97316;
            font-weight: 700;
        }
        .sidebar .link-list-label {
            font-size: 0.8rem;
            color: #94a3b8;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-top: 1.2rem;
            font-weight: 600;
        }
        .search-section {
            margin: 2rem 0 1.5rem;
        }
        .search-form {
            display: flex;
            gap: 0.5rem;
            max-width: 560px;
            background: #fff;
            border-radius: 60px;
            border: 2px solid #dce3ec;
            padding: 0.2rem 0.2rem 0.2rem 1.2rem;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
        }
        .search-form:focus-within {
            border-color: #f97316;
            box-shadow: 0 4px 20px rgba(249, 115, 22, 0.12);
        }
        .search-form input {
            flex: 1;
            border: none;
            padding: 0.7rem 0;
            font-size: 1rem;
            background: transparent;
            outline: none;
            color: #1e293b;
            min-width: 0;
        }
        .search-form input::placeholder {
            color: #94a3b8;
        }
        .search-form button {
            background: #f97316;
            color: #fff;
            border: none;
            padding: 0.6rem 1.4rem;
            border-radius: 60px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.25s ease, transform 0.15s ease;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            white-space: nowrap;
        }
        .search-form button:hover {
            background: #ea580c;
            transform: scale(0.97);
        }
        .interaction-area {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
            margin: 2.5rem 0 1.5rem;
        }
        @media(max-width:700px) {
            .interaction-area {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
        }
        .card-interact {
            background: #fff;
            border-radius: 16px;
            padding: 1.4rem 1.5rem 1.8rem;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.03);
            border: 1px solid #eef2f6;
        }
        .card-interact h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
            color: #0b1a2e;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .card-interact h3 i {
            color: #f97316;
        }
        .card-interact form {
            display: flex;
            flex-direction: column;
            gap: 0.7rem;
        }
        .card-interact form input,
        .card-interact form textarea,
        .card-interact form select {
            width: 100%;
            padding: 0.65rem 0.9rem;
            border: 1.5px solid #dce3ec;
            border-radius: 10px;
            font-size: 0.95rem;
            font-family: inherit;
            transition: border-color 0.2s ease;
            background: #fafcff;
        }
        .card-interact form input:focus,
        .card-interact form textarea:focus,
        .card-interact form select:focus {
            border-color: #f97316;
            outline: none;
            box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.1);
        }
        .card-interact form textarea {
            resize: vertical;
            min-height: 70px;
        }
        .card-interact form button {
            background: #1a3a5c;
            color: #fff;
            border: none;
            padding: 0.65rem 1.2rem;
            border-radius: 60px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.25s ease, transform 0.1s ease;
            align-self: flex-start;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .card-interact form button:hover {
            background: #0f2c42;
            transform: scale(0.97);
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #d1d5db;
            cursor: pointer;
            flex-direction: row-reverse;
            justify-content: flex-end;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            transition: color 0.2s ease, transform 0.1s ease;
            cursor: pointer;
        }
        .rating-stars label:hover,
        .rating-stars label:hover~label,
        .rating-stars input:checked~label {
            color: #f59e0b;
            transform: scale(1.05);
        }
        friend-link {
            display: block;
            background: #f1f5f9;
            border-radius: 16px;
            padding: 1.5rem 1.8rem;
            margin: 2rem 0 1.2rem;
            border: 1px solid #dce3ec;
        }
        friend-link h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: #0b1a2e;
            margin-bottom: 0.8rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        friend-link ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem 1.2rem;
        }
        friend-link ul li a {
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.2rem 0;
        }
        .site-footer {
            background: #0b1a2e;
            color: #cbd5e1;
            padding: 1.8rem 0;
            margin-top: 2.5rem;
            border-top: 4px solid #facc15;
        }
        .site-footer .container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 0.8rem 1.5rem;
        }
        .site-footer .copyright {
            font-size: 0.9rem;
            color: #94a3b8;
        }
        .site-footer .copyright strong {
            color: #facc15;
        }
        .site-footer .footer-links a {
            color: #cbd5e1;
            font-size: 0.9rem;
            margin-left: 1rem;
        }
        .site-footer .footer-links a:hover {
            color: #facc15;
        }
        @media(max-width:820px) {
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding-top: 0.75rem;
                gap: 0.15rem;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 0.6rem 1rem;
                border-radius: 6px;
                white-space: normal;
            }
            .nav-toggle {
                display: block;
            }
            .article-body h1 {
                font-size: 2rem;
            }
            .article-body h2 {
                font-size: 1.6rem;
            }
            .article-body h3 {
                font-size: 1.25rem;
            }
            .sidebar {
                position: static;
                margin-top: 1.5rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .my-logo span {
                font-size: 0.75rem;
            }
        }
        @media(max-width:480px) {
            .article-body h1 {
                font-size: 1.65rem;
            }
            .container {
                padding: 0 1rem;
            }
            .header-inner {
                gap: 0.3rem;
            }
            .search-form {
                flex-wrap: wrap;
                border-radius: 20px;
                padding: 0.3rem;
            }
            .search-form input {
                padding: 0.5rem 0.8rem;
                width: 100%;
            }
            .search-form button {
                width: 100%;
                justify-content: center;
                padding: 0.5rem;
            }
            .card-interact {
                padding: 1rem;
            }
            friend-link ul {
                flex-direction: column;
                gap: 0.3rem;
            }
            .site-footer .container {
                flex-direction: column;
                text-align: center;
            }
            .site-footer .footer-links a {
                margin: 0 0.5rem;
            }
        }
        .emoji-lg {
            font-size: 1.4em;
            line-height: 1;
        }
        .badge {
            background: #facc15;
            color: #0b1a2e;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 0.15rem 0.6rem;
            border-radius: 60px;
            display: inline-block;
        }
        .hr-symbol {
            text-align: center;
            margin: 1.8rem 0;
            font-size: 1.4rem;
            color: #d1d5db;
            letter-spacing: 1rem;
        }
        @media print {
            .site-header {
                position: static;
                background: #fff;
                color: #000;
            }
            .site-header a {
                color: #000;
            }
            .nav-toggle,
            .search-form button,
            .card-interact form button {
                display: none;
            }
            .sidebar {
                position: static;
            }
            .breadcrumb-wrap {
                background: #f9f9f9;
            }
        }