* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
            background: #f5f7fa;
            color: #1a2634;
            line-height: 1.7;
            font-size: 16px;
        }
        a {
            color: #0066cc;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #004080;
            text-decoration: underline;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #0b1a2e 0%, #1a3a5c 100%);
            color: #fff;
            padding: 16px 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;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #fff;
            background: linear-gradient(135deg, #f7971e, #ffd200);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: none;
            transition: opacity 0.2s;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
        }
        .my-logo small {
            font-size: 0.7rem;
            display: block;
            -webkit-text-fill-color: #aac4e0;
            color: #aac4e0;
            font-weight: 400;
            letter-spacing: 0.3px;
        }
        .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;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        nav#main-nav ul {
            display: flex;
            list-style: none;
            gap: 8px;
            flex-wrap: wrap;
        }
        nav#main-nav ul li a {
            color: #e0ecff;
            padding: 8px 16px;
            border-radius: 40px;
            font-weight: 500;
            font-size: 0.9rem;
            transition: all 0.2s;
            white-space: nowrap;
        }
        nav#main-nav ul li a:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            text-decoration: none;
        }
        nav#main-nav ul li a.active {
            background: #f7971e;
            color: #0b1a2e;
        }
        .breadcrumb {
            padding: 12px 0 4px;
            font-size: 0.85rem;
            color: #7a8ea0;
        }
        .breadcrumb a {
            color: #7a8ea0;
        }
        .breadcrumb a:hover {
            color: #0066cc;
        }
        .breadcrumb span {
            color: #2c3e50;
            font-weight: 500;
        }
        .page-wrap {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 30px 0 60px;
        }
        .main-content {
            min-width: 0;
        }
        .sidebar {
            position: sticky;
            top: 110px;
            align-self: start;
        }
        h1 {
            font-size: 2.4rem;
            line-height: 1.2;
            margin-bottom: 16px;
            color: #0b1a2e;
            font-weight: 800;
            letter-spacing: -0.5px;
        }
        h2 {
            font-size: 1.7rem;
            margin-top: 48px;
            margin-bottom: 16px;
            color: #0b1a2e;
            font-weight: 700;
            border-left: 5px solid #f7971e;
            padding-left: 16px;
        }
        h3 {
            font-size: 1.25rem;
            margin-top: 32px;
            margin-bottom: 10px;
            color: #1a3a5c;
            font-weight: 600;
        }
        h4 {
            font-size: 1.05rem;
            margin-top: 24px;
            margin-bottom: 8px;
            color: #2c4a6e;
            font-weight: 600;
        }
        p {
            margin-bottom: 18px;
            color: #2c3e50;
        }
        .meta-info {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 0.9rem;
            color: #6b7f93;
            margin-bottom: 24px;
            padding-bottom: 16px;
            border-bottom: 1px solid #e2e8f0;
        }
        .meta-info i {
            margin-right: 6px;
            color: #f7971e;
        }
        .article-image {
            width: 100%;
            border-radius: 16px;
            margin: 24px 0 30px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            display: block;
            max-width: 100%;
            height: auto;
        }
        .highlight-box {
            background: linear-gradient(135deg, #fef9e7, #fdf2d5);
            border-left: 6px solid #f7971e;
            padding: 20px 24px;
            border-radius: 12px;
            margin: 24px 0;
        }
        .highlight-box p:last-child {
            margin-bottom: 0;
        }
        .tip-card {
            background: #fff;
            border-radius: 16px;
            padding: 22px 26px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
            margin: 20px 0;
            border: 1px solid #edf2f7;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .tip-card:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.07);
        }
        .tip-card h4 {
            margin-top: 0;
            color: #f7971e;
        }
        ul, ol {
            margin: 0 0 18px 24px;
            color: #2c3e50;
        }
        li {
            margin-bottom: 6px;
        }
        strong {
            color: #0b1a2e;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 16px;
            padding: 24px;
            margin-bottom: 24px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
            border: 1px solid #edf2f7;
        }
        .sidebar-card h3 {
            margin-top: 0;
            font-size: 1.1rem;
            border-bottom: 2px solid #f0f4f8;
            padding-bottom: 10px;
            margin-bottom: 14px;
            color: #0b1a2e;
        }
        .sidebar-card ul {
            list-style: none;
            margin-left: 0;
        }
        .sidebar-card ul li {
            padding: 8px 0;
            border-bottom: 1px solid #f0f4f8;
        }
        .sidebar-card ul li:last-child {
            border-bottom: none;
        }
        .sidebar-card ul li a {
            font-weight: 500;
        }
        .search-form {
            display: flex;
            gap: 8px;
        }
        .search-form input {
            flex: 1;
            padding: 10px 16px;
            border: 2px solid #e2e8f0;
            border-radius: 40px;
            font-size: 0.95rem;
            outline: none;
            transition: border-color 0.2s;
            background: #f8fafc;
        }
        .search-form input:focus {
            border-color: #f7971e;
        }
        .search-form button {
            background: #f7971e;
            border: none;
            border-radius: 40px;
            padding: 10px 20px;
            color: #fff;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            font-size: 0.95rem;
        }
        .search-form button:hover {
            background: #e08600;
        }
        .comment-section,
        .rating-section {
            background: #fff;
            border-radius: 16px;
            padding: 28px 32px;
            margin-top: 48px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
            border: 1px solid #edf2f7;
        }
        .comment-section h2,
        .rating-section h2 {
            margin-top: 0;
            border-left-color: #1a3a5c;
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 6px;
            color: #1a3a5c;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid #e2e8f0;
            border-radius: 10px;
            font-size: 1rem;
            font-family: inherit;
            outline: none;
            transition: border-color 0.2s;
            background: #f8fafc;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: #f7971e;
        }
        .form-group textarea {
            resize: vertical;
            min-height: 100px;
        }
        .btn-submit {
            background: #0b1a2e;
            border: none;
            border-radius: 40px;
            padding: 12px 32px;
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
        }
        .btn-submit:hover {
            background: #1a3a5c;
            transform: translateY(-1px);
        }
        .star-rating {
            display: flex;
            gap: 6px;
            font-size: 1.8rem;
            color: #e2e8f0;
            cursor: pointer;
            direction: rtl;
        }
        .star-rating i {
            transition: color 0.15s;
        }
        .star-rating i:hover,
        .star-rating i:hover~i {
            color: #f7971e;
        }
        .rating-select {
            font-size: 1rem;
            padding: 8px 16px;
            border-radius: 10px;
            border: 2px solid #e2e8f0;
            background: #f8fafc;
        }
        friend-link {
            display: block;
            background: #1a2a3a;
            color: #e0ecff;
            padding: 32px 24px;
            border-radius: 16px;
            margin-top: 48px;
            font-style: normal;
        }
        friend-link a {
            color: #ffd200;
            display: inline-block;
            padding: 4px 0;
        }
        friend-link a:hover {
            color: #fff;
        }
        friend-link .fl-head {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: #fff;
            letter-spacing: 0.5px;
        }
        friend-link .fl-list {
            columns: 2 220px;
            column-gap: 32px;
        }
        friend-link .fl-list a {
            display: block;
            padding: 5px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        footer {
            background: #0b1a2e;
            color: #aac4e0;
            padding: 32px 0 28px;
            text-align: center;
            font-size: 0.9rem;
            border-top: 2px solid #1a3a5c;
        }
        footer .copyright {
            margin-top: 12px;
            color: #6b8aa8;
        }
        footer a {
            color: #ffd200;
        }
        footer a:hover {
            color: #fff;
        }
        @media (max-width: 992px) {
            .page-wrap {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .sidebar {
                position: static;
                order: 2;
            }
            .main-content {
                order: 1;
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            nav#main-nav {
                display: none;
                width: 100%;
                margin-top: 16px;
                border-top: 1px solid rgba(255, 255, 255, 0.08);
                padding-top: 12px;
            }
            nav#main-nav.open {
                display: block;
            }
            nav#main-nav ul {
                flex-direction: column;
                gap: 4px;
            }
            nav#main-nav ul li a {
                display: block;
                padding: 12px 16px;
                border-radius: 8px;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.35rem;
            }
            h3 {
                font-size: 1.1rem;
            }
            .container {
                padding: 0 14px;
            }
            .comment-section,
            .rating-section {
                padding: 20px 18px;
            }
            .meta-info {
                gap: 12px;
                font-size: 0.8rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                width: 100%;
            }
            friend-link .fl-list {
                columns: 1;
            }
        }
        @media (max-width: 480px) {
            body {
                font-size: 15px;
            }
            .my-logo {
                font-size: 1.3rem;
            }
            .highlight-box {
                padding: 16px 18px;
            }
            .tip-card {
                padding: 16px 18px;
            }
        }
        html {
            scroll-behavior: smooth;
        }
        @media print {
            header,
            .sidebar,
            .comment-section,
            .rating-section,
            friend-link,
            footer,
            .search-form {
                display: none !important;
            }
            .page-wrap {
                display: block;
            }
            body {
                background: #fff;
                color: #000;
            }
        }