*,
        *::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: #f5f7fb;
            color: #1a1a2e;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        a {
            text-decoration: none;
            color: #d43f3f;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #a82b2b;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        h1,
        h2,
        h3,
        h4 {
            line-height: 1.3;
            color: #0b1a2e;
            font-weight: 700;
        }
        h1 {
            font-size: 2.4rem;
            margin-bottom: 1rem;
        }
        h2 {
            font-size: 1.8rem;
            margin: 2.2rem 0 0.8rem 0;
            border-bottom: 3px solid #d43f3f;
            padding-bottom: 0.4rem;
        }
        h3 {
            font-size: 1.4rem;
            margin: 1.6rem 0 0.5rem 0;
        }
        h4 {
            font-size: 1.15rem;
            margin: 1.2rem 0 0.3rem 0;
            color: #2c3e50;
        }
        p {
            margin-bottom: 1.1rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #0b1a2e 0%, #1a3a5c 100%);
            color: #fff;
            padding: 0 0 0.2rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 0.8rem 20px;
            max-width: 1200px;
            margin: 0 auto;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #ffd700;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
            transition: transform 0.2s ease;
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
            color: #ffed4a;
        }
        .my-logo span {
            color: #fff;
            font-weight: 300;
        }
        .my-logo i {
            color: #ffd700;
            margin-right: 6px;
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 4px 10px;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .main-nav {
            display: flex;
            gap: 0.3rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .main-nav a {
            color: #e0e8f0;
            padding: 0.5rem 1rem;
            border-radius: 30px;
            font-weight: 500;
            font-size: 0.9rem;
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        .main-nav a:hover {
            background: rgba(255, 215, 0, 0.15);
            color: #ffd700;
            text-decoration: none;
        }
        .main-nav a.active {
            background: #d43f3f;
            color: #fff;
        }
        .breadcrumb-wrap {
            background: #eef2f7;
            padding: 0.5rem 20px;
            border-bottom: 1px solid #dce3ed;
            font-size: 0.85rem;
            max-width: 1200px;
            margin: 0 auto;
        }
        .breadcrumb-wrap nav ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
            padding: 0;
            margin: 0;
        }
        .breadcrumb-wrap nav ol li {
            margin: 0;
        }
        .breadcrumb-wrap nav ol li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #888;
        }
        .breadcrumb-wrap a {
            color: #2c3e50;
        }
        .breadcrumb-wrap a:hover {
            color: #d43f3f;
        }
        .breadcrumb-wrap .current {
            color: #888;
            font-weight: 500;
        }
        .hero {
            background: linear-gradient(145deg, #0f2b44, #1b4a6e);
            color: #fff;
            padding: 2.8rem 20px 2.4rem;
            text-align: center;
            border-bottom: 4px solid #ffd700;
        }
        .hero h1 {
            color: #ffd700;
            font-size: 2.8rem;
            margin-bottom: 0.5rem;
            text-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0.6rem auto 0;
            color: #dce8f2;
        }
        .hero .badge {
            display: inline-block;
            background: #d43f3f;
            padding: 0.2rem 1.2rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            margin-top: 0.8rem;
            color: #fff;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 2.5rem;
            padding: 2.2rem 20px 3rem;
            max-width: 1200px;
            margin: 0 auto;
        }
        @media (max-width: 900px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .main-content {
            min-width: 0;
        }
        .sidebar {
            position: sticky;
            top: 90px;
            align-self: start;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 16px;
            padding: 1.5rem;
            margin-bottom: 1.8rem;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
            border: 1px solid #e8edf5;
        }
        .sidebar-card h3 {
            margin-top: 0;
            font-size: 1.2rem;
            color: #0b1a2e;
            border-bottom: 2px solid #ffd700;
            padding-bottom: 0.4rem;
            margin-bottom: 1rem;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-card ul li {
            padding: 0.5rem 0;
            border-bottom: 1px solid #f0f3f8;
            margin: 0;
        }
        .sidebar-card ul li:last-child {
            border-bottom: none;
        }
        .sidebar-card ul li a {
            font-weight: 500;
            display: block;
        }
        .sidebar-card ul li a:hover {
            padding-left: 4px;
        }
        .feature-image {
            border-radius: 16px;
            overflow: hidden;
            margin: 1.8rem 0 2.2rem;
            box-shadow: 0 6px 30px rgba(0, 0, 0, 0.08);
            background: #dce3ed;
        }
        .feature-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        .feature-image .img-placeholder {
            background: linear-gradient(135deg, #1a3a5c, #2d6a9f);
            padding: 3rem 2rem;
            text-align: center;
            color: #ffd700;
            font-size: 1.3rem;
            min-height: 280px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }
        .feature-image .img-placeholder i {
            font-size: 4rem;
            margin-bottom: 1rem;
            opacity: 0.9;
        }
        .feature-image .img-placeholder span {
            font-weight: 300;
            color: #dce8f2;
            font-size: 1rem;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            background: #fff;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
            margin: 1.5rem 0;
        }
        .data-table thead {
            background: #0b1a2e;
            color: #fff;
        }
        .data-table th {
            padding: 0.8rem 1rem;
            text-align: left;
            font-weight: 600;
        }
        .data-table td {
            padding: 0.7rem 1rem;
            border-bottom: 1px solid #eef2f7;
        }
        .data-table tbody tr:hover {
            background: #f8faff;
        }
        .data-table tbody tr:last-child td {
            border-bottom: none;
        }
        .search-section {
            background: #fff;
            border-radius: 16px;
            padding: 1.8rem 2rem;
            margin: 2.5rem 0;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.05);
            border: 1px solid #e8edf5;
        }
        .search-section form {
            display: flex;
            gap: 0.6rem;
            flex-wrap: wrap;
        }
        .search-section input[type="text"] {
            flex: 1;
            min-width: 180px;
            padding: 0.8rem 1.2rem;
            border: 2px solid #dce3ed;
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            transition: border 0.2s;
        }
        .search-section input[type="text"]:focus {
            border-color: #d43f3f;
        }
        .search-section button {
            background: #d43f3f;
            color: #fff;
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-section button:hover {
            background: #a82b2b;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin: 2.5rem 0;
        }
        @media (max-width: 700px) {
            .interaction-grid {
                grid-template-columns: 1fr;
            }
        }
        .comment-box,
        .rating-box {
            background: #fff;
            border-radius: 16px;
            padding: 1.8rem 2rem;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.05);
            border: 1px solid #e8edf5;
        }
        .comment-box h3,
        .rating-box h3 {
            margin-top: 0;
            font-size: 1.3rem;
            border-bottom: 2px solid #ffd700;
            padding-bottom: 0.4rem;
            margin-bottom: 1.2rem;
        }
        .comment-box form,
        .rating-box form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .comment-box textarea {
            padding: 0.8rem 1rem;
            border: 2px solid #dce3ed;
            border-radius: 12px;
            font-size: 1rem;
            resize: vertical;
            min-height: 90px;
            font-family: inherit;
            outline: none;
            transition: border 0.2s;
        }
        .comment-box textarea:focus {
            border-color: #d43f3f;
        }
        .comment-box input[type="text"],
        .rating-box select {
            padding: 0.7rem 1rem;
            border: 2px solid #dce3ed;
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            font-family: inherit;
            transition: border 0.2s;
        }
        .comment-box input[type="text"]:focus,
        .rating-box select:focus {
            border-color: #d43f3f;
        }
        .comment-box button,
        .rating-box button {
            background: #0b1a2e;
            color: #fff;
            border: none;
            padding: 0.7rem 1.8rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s;
            align-self: flex-start;
        }
        .comment-box button:hover,
        .rating-box button:hover {
            background: #1a3a5c;
        }
        .rating-box .star-display {
            font-size: 1.6rem;
            color: #ffd700;
            letter-spacing: 4px;
        }
        .last-updated {
            display: inline-block;
            background: #eef2f7;
            padding: 0.3rem 1.2rem;
            border-radius: 40px;
            font-size: 0.85rem;
            color: #555;
            margin: 1rem 0 0.5rem;
        }
        .last-updated i {
            margin-right: 6px;
            color: #d43f3f;
        }
        .site-footer {
            background: #0b1a2e;
            color: #c8d6e5;
            padding: 2.5rem 20px 1.8rem;
            border-top: 3px solid #ffd700;
        }
        .footer-inner {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }
        @media (max-width: 600px) {
            .footer-inner {
                grid-template-columns: 1fr;
            }
        }
        .footer-inner h4 {
            color: #ffd700;
            margin-bottom: 0.8rem;
            font-size: 1.1rem;
        }
        .footer-inner a {
            color: #b0c8dd;
        }
        .footer-inner a:hover {
            color: #ffd700;
        }
        .footer-inner ul {
            list-style: none;
            padding: 0;
        }
        .footer-inner ul li {
            padding: 0.25rem 0;
            margin: 0;
        }
        .copyright {
            text-align: center;
            padding-top: 1.8rem;
            margin-top: 1.8rem;
            border-top: 1px solid #1a3a5c;
            color: #8899aa;
            font-size: 0.85rem;
        }
        .copyright a {
            color: #ffd700;
        }
        friend-link {
            display: block;
            margin-top: 1rem;
        }
        friend-link a {
            display: inline-block;
            margin: 0.2rem 1rem 0.2rem 0;
            padding: 0.2rem 0;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.2rem;
            }
            .hero h1 {
                font-size: 1.9rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .nav-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding: 0.8rem 0 0.2rem 0;
                gap: 0.2rem;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 0.6rem 1rem;
                border-radius: 8px;
                white-space: normal;
            }
            .header-inner {
                padding: 0.5rem 16px;
            }
            .breadcrumb-wrap {
                padding: 0.4rem 16px;
                font-size: 0.75rem;
            }
            .content-grid {
                padding: 1.2rem 16px 2rem;
                gap: 1.5rem;
            }
            .search-section {
                padding: 1.2rem 1.2rem;
            }
            .comment-box,
            .rating-box {
                padding: 1.2rem 1.2rem;
            }
            .data-table {
                font-size: 0.85rem;
            }
            .data-table th,
            .data-table td {
                padding: 0.5rem 0.6rem;
            }
            .sidebar {
                position: static;
            }
            .feature-image .img-placeholder {
                min-height: 180px;
                padding: 1.5rem 1rem;
                font-size: 1rem;
            }
            .feature-image .img-placeholder i {
                font-size: 2.8rem;
            }
        }
        @media (max-width: 480px) {
            .search-section form {
                flex-direction: column;
            }
            .search-section input[type="text"] {
                min-width: auto;
            }
            .search-section button {
                justify-content: center;
            }
            .interaction-grid {
                gap: 1.2rem;
            }
        }
        .highlight {
            background: #fff8e1;
            padding: 0.1rem 0.3rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .btn-outline {
            display: inline-block;
            padding: 0.4rem 1.2rem;
            border: 2px solid #d43f3f;
            border-radius: 40px;
            color: #d43f3f;
            font-weight: 600;
            font-size: 0.85rem;
            transition: all 0.2s;
        }
        .btn-outline:hover {
            background: #d43f3f;
            color: #fff;
            text-decoration: none;
        }
        .tag {
            display: inline-block;
            background: #eef2f7;
            padding: 0.15rem 0.8rem;
            border-radius: 30px;
            font-size: 0.8rem;
            color: #2c3e50;
            margin-right: 0.3rem;
        }
        .emoji-big {
            font-size: 1.8rem;
            margin-right: 0.4rem;
        }
        .divider {
            height: 2px;
            background: linear-gradient(90deg, #ffd700, #d43f3f, transparent);
            margin: 2rem 0;
            border: none;
        }
        .tip-box {
            background: #e8f4fd;
            border-left: 4px solid #2d6a9f;
            padding: 1rem 1.5rem;
            border-radius: 0 12px 12px 0;
            margin: 1.5rem 0;
        }
        .tip-box strong {
            color: #0b1a2e;
        }
        .quote-box {
            background: #f9f6f0;
            border-left: 4px solid #ffd700;
            padding: 1rem 1.5rem;
            border-radius: 0 12px 12px 0;
            margin: 1.5rem 0;
            font-style: italic;
        }