* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, sans-serif;
            background: #f8f9fc;
            color: #1e2a3a;
            line-height: 1.7;
            padding: 0 1rem;
        }
        a {
            color: #2a6f97;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #1a4d6b;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        .container {
            max-width: 1140px;
            margin: 0 auto;
            padding: 0 1rem;
        }
        header {
            background: linear-gradient(145deg, #ffffff, #f0f4fa);
            border-radius: 0 0 24px 24px;
            padding: 1.2rem 0;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(6px);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.8rem;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #1e3c5c, #3a7ca5);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }
        .my-logo i {
            -webkit-text-fill-color: #2a6f97;
            font-size: 1.7rem;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid #2a6f97;
            color: #2a6f97;
            font-size: 1.5rem;
            padding: 0.3rem 0.8rem;
            border-radius: 8px;
            cursor: pointer;
            transition: 0.2s;
        }
        .nav-toggle:hover {
            background: #2a6f97;
            color: #fff;
        }
        .nav-menu {
            display: flex;
            gap: 1.2rem;
            align-items: center;
            flex-wrap: wrap;
        }
        .nav-menu a {
            font-weight: 600;
            font-size: 0.95rem;
            padding: 0.4rem 0.2rem;
            border-bottom: 2px solid transparent;
            transition: 0.2s;
            color: #1e2a3a;
        }
        .nav-menu a:hover {
            border-bottom-color: #2a6f97;
            color: #2a6f97;
            text-decoration: none;
        }
        .nav-menu .active {
            border-bottom-color: #2a6f97;
            color: #2a6f97;
        }
        .breadcrumb {
            padding: 0.75rem 0 0.2rem;
            font-size: 0.85rem;
            color: #5f6c80;
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem;
        }
        .breadcrumb a {
            color: #2a6f97;
        }
        .breadcrumb span.sep {
            margin: 0 0.2rem;
            color: #9aa7b9;
        }
        .hero {
            padding: 2.5rem 0 1.5rem;
            text-align: center;
        }
        .hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            color: #0f2537;
            margin-bottom: 0.8rem;
            letter-spacing: -0.5px;
        }
        .hero h1 i {
            color: #e67e22;
            margin-right: 0.3rem;
        }
        .hero .subhead {
            font-size: 1.2rem;
            color: #3d5670;
            max-width: 700px;
            margin: 0 auto 1.2rem;
        }
        .hero .meta-info {
            font-size: 0.9rem;
            color: #6b7d94;
            display: flex;
            justify-content: center;
            gap: 1.5rem;
            flex-wrap: wrap;
        }
        .hero .meta-info i {
            margin-right: 0.3rem;
        }
        .search-bar {
            max-width: 550px;
            margin: 1.8rem auto 2.2rem;
            display: flex;
            border-radius: 60px;
            overflow: hidden;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
            background: #fff;
            border: 1px solid #dce3ed;
        }
        .search-bar input {
            flex: 1;
            padding: 0.85rem 1.4rem;
            border: none;
            font-size: 1rem;
            outline: none;
            background: transparent;
            color: #1e2a3a;
        }
        .search-bar input::placeholder {
            color: #8a9bb0;
        }
        .search-bar button {
            background: #2a6f97;
            color: #fff;
            border: none;
            padding: 0 1.6rem;
            font-size: 1.1rem;
            cursor: pointer;
            transition: 0.2s;
        }
        .search-bar button:hover {
            background: #1a4d6b;
        }
        main {
            padding: 0.5rem 0 3rem;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        .content-main {
            min-width: 0;
        }
        .content-main h2 {
            font-size: 2rem;
            margin: 2.2rem 0 1rem;
            color: #0f2537;
            border-left: 5px solid #e67e22;
            padding-left: 1rem;
        }
        .content-main h3 {
            font-size: 1.5rem;
            margin: 1.8rem 0 0.8rem;
            color: #1e3c5c;
        }
        .content-main h4 {
            font-size: 1.2rem;
            margin: 1.4rem 0 0.5rem;
            color: #2a5775;
        }
        .content-main p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
            color: #2a3a4e;
        }
        .content-main ul,
        .content-main ol {
            margin: 0.8rem 0 1.4rem 1.6rem;
        }
        .content-main li {
            margin-bottom: 0.5rem;
            font-size: 1.02rem;
        }
        .highlight-box {
            background: #eaf0f9;
            border-radius: 16px;
            padding: 1.6rem 2rem;
            margin: 1.8rem 0;
            border-left: 6px solid #2a6f97;
        }
        .highlight-box strong {
            color: #0f2537;
        }
        .feature-image {
            margin: 2rem 0;
            border-radius: 14px;
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.06);
        }
        .feature-image figcaption {
            font-size: 0.9rem;
            color: #5f6c80;
            text-align: center;
            margin-top: 0.6rem;
            font-style: italic;
        }
        .sidebar {
            background: #ffffff;
            border-radius: 20px;
            padding: 1.6rem 1.4rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
            position: sticky;
            top: 120px;
            align-self: start;
            height: fit-content;
        }
        .sidebar h3 {
            font-size: 1.3rem;
            margin-bottom: 1.2rem;
            color: #0f2537;
            border-bottom: 2px solid #eaf0f9;
            padding-bottom: 0.6rem;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar li {
            margin-bottom: 0.7rem;
        }
        .sidebar li a {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.4rem 0.6rem;
            border-radius: 8px;
            transition: 0.15s;
            color: #1e2a3a;
            font-weight: 500;
        }
        .sidebar li a:hover {
            background: #eaf0f9;
            text-decoration: none;
            color: #2a6f97;
        }
        .sidebar li a i {
            color: #e67e22;
            width: 1.2rem;
            text-align: center;
        }
        .interaction-section {
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 2px solid #dce3ed;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }
        .comment-box,
        .rating-box {
            background: #ffffff;
            border-radius: 20px;
            padding: 1.6rem 1.8rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
        }
        .comment-box h3,
        .rating-box h3 {
            font-size: 1.3rem;
            margin-bottom: 1rem;
            color: #0f2537;
        }
        .comment-box textarea,
        .comment-box input {
            width: 100%;
            padding: 0.75rem 1rem;
            border: 1px solid #dce3ed;
            border-radius: 10px;
            font-size: 1rem;
            margin-bottom: 0.8rem;
            font-family: inherit;
            resize: vertical;
        }
        .comment-box textarea {
            min-height: 100px;
        }
        .comment-box button,
        .rating-box button {
            background: #2a6f97;
            color: #fff;
            border: none;
            padding: 0.7rem 1.8rem;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: 0.2s;
        }
        .comment-box button:hover,
        .rating-box button:hover {
            background: #1a4d6b;
        }
        .rating-stars {
            display: flex;
            gap: 0.4rem;
            font-size: 2rem;
            color: #dce3ed;
            margin: 0.6rem 0 1rem;
            cursor: pointer;
        }
        .rating-stars i {
            transition: 0.15s;
        }
        .rating-stars i:hover,
        .rating-stars i.active {
            color: #f1c40f;
        }
        footer {
            background: #0f2537;
            color: #cbd8e6;
            padding: 2.8rem 0 1.8rem;
            border-radius: 28px 28px 0 0;
            margin-top: 2rem;
        }
        footer .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
        }
        footer a {
            color: #b4c8dd;
        }
        footer a:hover {
            color: #ffffff;
        }
        friend-link {
            display: block;
            margin-top: 1.2rem;
            font-style: normal;
        }
        friend-link a {
            display: inline-block;
            margin: 0.2rem 1rem 0.2rem 0;
            padding: 0.2rem 0;
        }
        .copyright {
            grid-column: 1 / -1;
            border-top: 1px solid #2a4a6a;
            padding-top: 1.5rem;
            margin-top: 1.5rem;
            text-align: center;
            font-size: 0.9rem;
            color: #8aa3bd;
        }
        @media (max-width: 860px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                margin-top: 2rem;
            }
            .interaction-grid {
                grid-template-columns: 1fr;
            }
            footer .footer-inner {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                background: #ffffff;
                padding: 1rem 0;
                border-radius: 16px;
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
                margin-top: 0.5rem;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-toggle {
                display: inline-block;
            }
            .header-inner {
                flex-wrap: wrap;
            }
        }
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 1.7rem;
            }
            .search-bar input {
                padding: 0.65rem 1rem;
                font-size: 0.9rem;
            }
            .search-bar button {
                padding: 0 1rem;
            }
            .container {
                padding: 0 0.5rem;
            }
            body {
                padding: 0 0.5rem;
            }
        }
        .text-small {
            font-size: 0.9rem;
            color: #5f6c80;
        }
        .flex-center {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .mt-1 {
            margin-top: 1rem;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }
        .emoji-big {
            font-size: 1.4rem;
        }
        .badge {
            display: inline-block;
            background: #e67e22;
            color: #fff;
            padding: 0.1rem 0.7rem;
            border-radius: 30px;
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 0.3px;
        }