*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            background: #f5f7fa;
            color: #1e293b;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #0f3b5e;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover {
            color: #b22222;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .site-header {
            background: linear-gradient(145deg, #0a1f2e 0%, #132b3f 100%);
            color: #fff;
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #facc15;
            text-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
            transition: transform 0.2s;
        }
        .my-logo:hover {
            transform: scale(1.02);
            color: #fde047;
            text-decoration: none;
        }
        .my-logo small {
            font-size: 0.75rem;
            font-weight: 400;
            color: #b0c4d9;
            display: block;
            letter-spacing: 0.3px;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 0.2rem;
            flex-wrap: wrap;
        }
        .nav-list li a {
            color: #e2e8f0;
            padding: 0.5rem 0.9rem;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: background 0.2s, color 0.2s;
            display: inline-block;
        }
        .nav-list li a:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #facc15;
            text-decoration: none;
        }
        .nav-list li a i {
            margin-right: 0.3rem;
        }
        .hamburger {
            display: none;
            background: none;
            border: 2px solid #facc15;
            color: #facc15;
            font-size: 1.6rem;
            padding: 0.2rem 0.7rem;
            border-radius: 8px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(250, 204, 21, 0.15);
        }
        .nav-mobile {
            display: none;
            width: 100%;
            background: #0f2a3b;
            margin-top: 0.8rem;
            border-radius: 12px;
            padding: 0.8rem 0.4rem;
        }
        .nav-mobile.active {
            display: block;
        }
        .nav-mobile ul {
            list-style: none;
            padding: 0;
        }
        .nav-mobile ul li a {
            display: block;
            padding: 0.6rem 1rem;
            color: #e2e8f0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            font-weight: 500;
        }
        .nav-mobile ul li a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: #facc15;
            text-decoration: none;
        }
        .breadcrumb-wrap {
            background: #e9edf2;
            padding: 0.5rem 0;
            border-bottom: 1px solid #dce2e9;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            font-size: 0.85rem;
            color: #475569;
        }
        .breadcrumb li+li::before {
            content: "›";
            padding: 0 0.6rem;
            color: #94a3b8;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #0f3b5e;
        }
        .breadcrumb .active {
            color: #b22222;
            font-weight: 600;
        }
        main {
            padding: 2.2rem 0 3rem;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        @media(max-width:992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .article-body h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.25;
            color: #0a1f2e;
            margin-bottom: 0.3rem;
            border-left: 6px solid #b22222;
            padding-left: 1rem;
        }
        .article-body .subtitle {
            font-size: 1.05rem;
            color: #475569;
            margin-bottom: 1.8rem;
            font-style: italic;
        }
        .article-body .meta-line {
            display: flex;
            flex-wrap: wrap;
            gap: 1.2rem;
            font-size: 0.9rem;
            color: #64748b;
            margin-bottom: 1.8rem;
            border-bottom: 1px solid #e2e8f0;
            padding-bottom: 0.8rem;
        }
        .article-body .meta-line i {
            margin-right: 0.3rem;
            color: #b22222;
        }
        .article-body h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: #0a1f2e;
            margin-top: 2.8rem;
            margin-bottom: 0.8rem;
            border-bottom: 3px solid #facc15;
            padding-bottom: 0.3rem;
        }
        .article-body h3 {
            font-size: 1.4rem;
            font-weight: 600;
            color: #1e3a5f;
            margin-top: 2rem;
            margin-bottom: 0.5rem;
        }
        .article-body h4 {
            font-size: 1.15rem;
            font-weight: 600;
            color: #2c3e50;
            margin-top: 1.4rem;
            margin-bottom: 0.3rem;
        }
        .article-body p {
            margin-bottom: 1rem;
            text-align: justify;
        }
        .article-body ul,
        .article-body ol {
            margin-bottom: 1.2rem;
        }
        .article-body li {
            margin-bottom: 0.3rem;
        }
        .article-body .highlight-box {
            background: #f1f5f9;
            border-left: 5px solid #b22222;
            padding: 1.2rem 1.5rem;
            border-radius: 0 12px 12px 0;
            margin: 1.5rem 0;
        }
        .article-body .highlight-box strong {
            color: #b22222;
        }
        .article-body .feature-img {
            border-radius: 16px;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.1);
            margin: 1.8rem 0;
            width: 100%;
            max-width: 800px;
        }
        .article-body .tip-card {
            background: #ffffff;
            border-radius: 16px;
            padding: 1.2rem 1.5rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
            margin: 1.2rem 0;
            border: 1px solid #e9edf2;
            transition: transform 0.2s;
        }
        .article-body .tip-card:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.08);
        }
        .article-body .tip-card i {
            color: #b22222;
            margin-right: 0.5rem;
        }
        .article-body .link-list-inline {
            display: inline;
            font-weight: 600;
            color: #b22222;
        }
        .sidebar {
            background: #ffffff;
            border-radius: 20px;
            padding: 1.5rem 1.2rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            border: 1px solid #e9edf2;
            height: fit-content;
            position: sticky;
            top: 100px;
        }
        .sidebar h3 {
            font-size: 1.3rem;
            border-bottom: 3px solid #facc15;
            padding-bottom: 0.4rem;
            margin-bottom: 1rem;
            color: #0a1f2e;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
        }
        .sidebar ul li {
            padding: 0.4rem 0;
            border-bottom: 1px dashed #e2e8f0;
        }
        .sidebar ul li a {
            font-weight: 500;
            display: block;
        }
        .sidebar ul li a:hover {
            color: #b22222;
            text-decoration: none;
        }
        .interaction-section {
            margin-top: 3rem;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.8rem;
        }
        @media(max-width:768px) {
            .interaction-section {
                grid-template-columns: 1fr;
            }
        }
        .interaction-card {
            background: #ffffff;
            border-radius: 16px;
            padding: 1.5rem 1.8rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
            border: 1px solid #e9edf2;
        }
        .interaction-card h3 {
            font-size: 1.3rem;
            margin-bottom: 0.8rem;
            color: #0a1f2e;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .interaction-card form {
            display: flex;
            flex-direction: column;
            gap: 0.7rem;
        }
        .interaction-card input,
        .interaction-card textarea,
        .interaction-card select {
            padding: 0.7rem 1rem;
            border: 1px solid #cbd5e1;
            border-radius: 10px;
            font-size: 0.95rem;
            font-family: inherit;
            transition: border 0.2s;
            background: #fafcff;
        }
        .interaction-card input:focus,
        .interaction-card textarea:focus {
            outline: none;
            border-color: #b22222;
            box-shadow: 0 0 0 3px rgba(178, 34, 34, 0.1);
        }
        .interaction-card .btn {
            background: #0a1f2e;
            color: #fff;
            border: none;
            padding: 0.7rem 1.4rem;
            border-radius: 30px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            font-size: 0.95rem;
        }
        .interaction-card .btn:hover {
            background: #b22222;
            transform: scale(1.01);
        }
        .interaction-card .btn i {
            margin-right: 0.4rem;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.2rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.8rem;
            color: #d1d5db;
            cursor: pointer;
            transition: color 0.15s;
        }
        .star-rating input:checked~label,
        .star-rating label:hover,
        .star-rating label:hover~label {
            color: #facc15;
        }
        friend-link {
            display: block;
            margin-top: 2.5rem;
            padding: 1.5rem 0;
            border-top: 2px solid #e2e8f0;
        }
        friend-link .fl-head {
            font-size: 1.2rem;
            font-weight: 700;
            color: #0a1f2e;
            margin-bottom: 0.6rem;
        }
        friend-link .fl-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem 1.5rem;
            list-style: none;
            padding: 0;
        }
        friend-link .fl-list li a {
            color: #0f3b5e;
            font-weight: 500;
            padding: 0.2rem 0.6rem;
            border-radius: 20px;
            background: #f1f4f8;
            transition: background 0.2s;
        }
        friend-link .fl-list li a:hover {
            background: #facc15;
            color: #0a1f2e;
            text-decoration: none;
        }
        .site-footer {
            background: #0a1f2e;
            color: #cbd5e1;
            padding: 2rem 0 1.5rem;
            margin-top: 2rem;
        }
        .site-footer .footer-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
        }
        .site-footer .copy {
            font-size: 0.9rem;
        }
        .site-footer .copy strong {
            color: #facc15;
        }
        .site-footer .footer-links a {
            color: #b0c4d9;
            margin-left: 1.2rem;
            font-size: 0.9rem;
        }
        .site-footer .footer-links a:hover {
            color: #facc15;
        }
        @media(max-width:768px) {
            .nav-list {
                display: none;
            }
            .hamburger {
                display: inline-block;
            }
            .header-inner {
                flex-wrap: wrap;
            }
            .article-body h1 {
                font-size: 1.8rem;
            }
            .article-body h2 {
                font-size: 1.5rem;
            }
            .article-body h3 {
                font-size: 1.2rem;
            }
            .article-body h4 {
                font-size: 1.05rem;
            }
            .sidebar {
                position: static;
            }
            .interaction-section {
                grid-template-columns: 1fr;
            }
            .site-footer .footer-inner {
                flex-direction: column;
                text-align: center;
            }
            .site-footer .footer-links a {
                margin: 0 0.6rem;
            }
        }
        @media(min-width:769px) {
            .nav-mobile {
                display: none !important;
            }
        }
        .scroll-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            background: #b22222;
            color: #fff;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            box-shadow: 0 4px 16px rgba(178, 34, 34, 0.3);
            cursor: pointer;
            transition: background 0.2s, transform 0.2s;
            border: none;
            z-index: 999;
        }
        .scroll-top:hover {
            background: #0a1f2e;
            transform: translateY(-4px);
        }
        .structured-data {
            display: none;
        }