* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: #f8f9fc;
            color: #1e2a36;
            line-height: 1.7;
            font-size: 16px;
        }
        a {
            color: #1a73e8;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #0b4b9e;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(145deg, #0f2b4b, #1a405e);
            color: #fff;
            padding: 0 0 12px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 14px 20px 6px 20px;
            max-width: 1200px;
            margin: 0 auto;
        }
        .my-logo {
            font-size: 1.7rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #fff;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.08);
            padding: 4px 18px 4px 14px;
            border-radius: 40px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            transition: background 0.25s ease;
        }
        .my-logo:hover {
            background: rgba(255, 255, 255, 0.18);
            text-decoration: none;
        }
        .my-logo i {
            font-size: 1.8rem;
            color: #fbbc04;
        }
        .my-logo span {
            font-weight: 300;
            font-size: 0.85rem;
            opacity: 0.7;
            margin-left: 4px;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background 0.2s ease;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        nav {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px 18px;
        }
        nav a {
            color: #e0e9f2;
            font-size: 0.95rem;
            font-weight: 500;
            padding: 6px 0;
            border-bottom: 2px solid transparent;
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        nav a:hover {
            color: #fff;
            border-bottom-color: #fbbc04;
            text-decoration: none;
        }
        .breadcrumb {
            padding: 8px 20px 4px 20px;
            max-width: 1200px;
            margin: 0 auto;
            font-size: 0.85rem;
            color: #b0c7db;
        }
        .breadcrumb a {
            color: #b0c7db;
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb .sep {
            margin: 0 6px;
            color: #5f7e9a;
        }
        .hero {
            background: linear-gradient(135deg, #e8edf5 0%, #d5dce8 100%);
            padding: 40px 20px 30px;
            border-radius: 0 0 40px 40px;
            margin: 0 0 30px 0;
            text-align: center;
        }
        .hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #0f2b4b;
            line-height: 1.2;
            margin-bottom: 12px;
        }
        .hero h1 i {
            color: #fbbc04;
            margin-right: 10px;
        }
        .hero p {
            font-size: 1.15rem;
            color: #2c4056;
            max-width: 760px;
            margin: 0 auto 10px auto;
        }
        .hero .meta {
            font-size: 0.9rem;
            color: #5f6f80;
            margin-top: 14px;
        }
        .hero .meta i {
            margin-right: 4px;
        }
        main {
            padding: 0 20px 40px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            max-width: 1200px;
            margin: 0 auto;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }
        article {
            background: #fff;
            border-radius: 24px;
            padding: 36px 40px 40px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
        }
        article h2 {
            font-size: 1.9rem;
            font-weight: 700;
            color: #0f2b4b;
            margin: 44px 0 16px 0;
            padding-bottom: 8px;
            border-bottom: 3px solid #fbbc04;
            display: inline-block;
        }
        article h2:first-of-type {
            margin-top: 0;
        }
        article h3 {
            font-size: 1.4rem;
            font-weight: 600;
            color: #1a405e;
            margin: 32px 0 12px 0;
        }
        article h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: #2c4a6a;
            margin: 22px 0 8px 0;
        }
        article p {
            margin-bottom: 18px;
            color: #2e3b48;
        }
        article ul,
        article ol {
            margin: 0 0 20px 24px;
            color: #2e3b48;
        }
        article li {
            margin-bottom: 8px;
        }
        article .feature-img {
            margin: 28px 0 18px;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
        }
        article .feature-img img {
            width: 100%;
            height: auto;
            display: block;
        }
        article .feature-img figcaption {
            background: #f1f4fa;
            padding: 10px 18px;
            font-size: 0.88rem;
            color: #4a5b6e;
            text-align: center;
            font-style: italic;
        }
        .highlight-box {
            background: #eef3fb;
            border-left: 5px solid #1a73e8;
            padding: 18px 24px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
        }
        .highlight-box strong {
            color: #0f2b4b;
        }
        .insight-card {
            background: #f8f2e7;
            border-radius: 16px;
            padding: 20px 24px;
            margin: 24px 0;
            border: 1px solid #f0e4d2;
        }
        .insight-card i {
            color: #e8a817;
            margin-right: 8px;
        }
        .stat-badge {
            display: inline-block;
            background: #0f2b4b;
            color: #fff;
            padding: 2px 14px;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .side-card {
            background: #fff;
            border-radius: 20px;
            padding: 24px 22px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
        }
        .side-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: #0f2b4b;
            margin-bottom: 14px;
            border-bottom: 2px solid #fbbc04;
            padding-bottom: 6px;
        }
        .side-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .side-card ul li {
            margin-bottom: 10px;
        }
        .side-card ul li a {
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .side-card ul li a i {
            color: #fbbc04;
            font-size: 0.8rem;
        }
        .search-form {
            display: flex;
            gap: 8px;
            margin-top: 6px;
        }
        .search-form input {
            flex: 1;
            padding: 10px 16px;
            border: 2px solid #dce3ec;
            border-radius: 40px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.2s ease;
            background: #f8f9fc;
        }
        .search-form input:focus {
            border-color: #1a73e8;
        }
        .search-form button {
            background: #0f2b4b;
            color: #fff;
            border: none;
            border-radius: 40px;
            padding: 0 22px;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s ease;
        }
        .search-form button:hover {
            background: #1a405e;
        }
        .rating-wrap {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px 20px;
            margin: 16px 0 10px;
            padding: 14px 18px;
            background: #f4f6fb;
            border-radius: 14px;
        }
        .stars-input {
            display: flex;
            gap: 4px;
            font-size: 1.6rem;
            cursor: pointer;
        }
        .stars-input i {
            color: #d0d6e0;
            transition: color 0.15s ease;
        }
        .stars-input i.active,
        .stars-input i:hover,
        .stars-input i:hover~i {
            color: #fbbc04;
        }
        .rating-form select {
            padding: 6px 12px;
            border-radius: 30px;
            border: 2px solid #dce3ec;
            background: #fff;
            font-size: 0.95rem;
        }
        .rating-form button {
            background: #1a73e8;
            color: #fff;
            border: none;
            border-radius: 30px;
            padding: 6px 20px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s ease;
        }
        .rating-form button:hover {
            background: #0b4b9e;
        }
        .comment-form textarea {
            width: 100%;
            padding: 14px 18px;
            border: 2px solid #dce3ec;
            border-radius: 16px;
            font-size: 0.95rem;
            font-family: inherit;
            resize: vertical;
            min-height: 90px;
            outline: none;
            transition: border 0.2s ease;
            background: #f8f9fc;
        }
        .comment-form textarea:focus {
            border-color: #1a73e8;
        }
        .comment-form .form-row {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 12px;
            align-items: center;
        }
        .comment-form input {
            flex: 1;
            min-width: 160px;
            padding: 10px 16px;
            border: 2px solid #dce3ec;
            border-radius: 40px;
            font-size: 0.95rem;
            outline: none;
            background: #f8f9fc;
        }
        .comment-form input:focus {
            border-color: #1a73e8;
        }
        .comment-form button {
            background: #0f2b4b;
            color: #fff;
            border: none;
            border-radius: 40px;
            padding: 10px 28px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s ease;
        }
        .comment-form button:hover {
            background: #1a405e;
        }
        footer {
            background: #0f2b4b;
            color: #d0dce8;
            padding: 40px 20px 24px;
            margin-top: 30px;
        }
        footer .footer-inner {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
        }
        @media (max-width: 768px) {
            footer .footer-inner {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }
        footer h4 {
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 12px;
            font-weight: 600;
        }
        footer a {
            color: #b0c7db;
        }
        footer a:hover {
            color: #fff;
        }
        friend-link {
            display: block;
            margin-top: 6px;
        }
        friend-link a {
            display: inline-block;
            margin-right: 20px;
            margin-bottom: 6px;
        }
        .copyright {
            border-top: 1px solid #2a4a68;
            padding-top: 20px;
            margin-top: 30px;
            text-align: center;
            font-size: 0.88rem;
            color: #8aa3b8;
        }
        .copyright strong {
            color: #d0dce8;
        }
        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
                padding: 10px 16px 4px 16px;
            }
            .my-logo {
                font-size: 1.3rem;
                padding: 4px 12px 4px 10px;
            }
            .hamburger {
                display: block;
            }
            nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding: 12px 0 6px 0;
                gap: 2px;
            }
            nav.open {
                display: flex;
            }
            nav a {
                padding: 10px 12px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                white-space: normal;
            }
            .breadcrumb {
                font-size: 0.75rem;
                padding: 6px 16px 2px 16px;
                overflow-x: auto;
                white-space: nowrap;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero p {
                font-size: 1rem;
            }
            article {
                padding: 20px 18px 28px;
                border-radius: 16px;
            }
            article h2 {
                font-size: 1.5rem;
            }
            article h3 {
                font-size: 1.2rem;
            }
            .content-grid {
                gap: 20px;
            }
            .rating-wrap {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 1.5rem;
            }
            .my-logo {
                font-size: 1.1rem;
                padding: 3px 10px 3px 8px;
            }
            .my-logo span {
                font-size: 0.7rem;
            }
            article {
                padding: 14px 12px 22px;
            }
        }
        html {
            scroll-behavior: smooth;
        }
        .toc {
            background: #f1f4fa;
            border-radius: 16px;
            padding: 18px 24px 16px;
            margin-bottom: 28px;
        }
        .toc strong {
            font-size: 1.05rem;
            color: #0f2b4b;
            display: block;
            margin-bottom: 8px;
        }
        .toc a {
            display: inline-block;
            margin-right: 18px;
            font-size: 0.92rem;
            margin-bottom: 4px;
        }
        .toc a i {
            font-size: 0.65rem;
            margin-right: 4px;
            color: #1a73e8;
        }