*,
        *::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, sans-serif;
            background: #f4f7fa;
            color: #1e2a3a;
            line-height: 1.7;
            padding: 0;
        }
        a {
            color: #0066cc;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover {
            color: #004999;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            color: #0b1a2a;
            margin-top: 1.6rem;
            margin-bottom: 0.6rem;
        }
        h1 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-top: 0.2rem;
        }
        h2 {
            font-size: 1.7rem;
            font-weight: 700;
            border-left: 5px solid #e74c3c;
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.3rem;
            font-weight: 600;
        }
        h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: #2c3e50;
        }
        p {
            margin-bottom: 1.1rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        header {
            background: linear-gradient(135deg, #0b1a2a 0%, #1a3a4a 100%);
            color: #fff;
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 18px rgba(0, 0, 0, 0.25);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            color: #fff;
            background: linear-gradient(135deg, #f1c40f, #e67e22);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 12px rgba(241, 196, 15, 0.25);
            transition: transform 0.2s;
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
        }
        .my-logo i {
            -webkit-text-fill-color: #f1c40f;
            margin-right: 6px;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            font-size: 1.5rem;
            padding: 0.4rem 0.8rem;
            border-radius: 8px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .nav-menu {
            display: flex;
            gap: 0.2rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .nav-menu a {
            color: #eaeaea;
            padding: 0.5rem 1rem;
            border-radius: 6px;
            font-size: 0.92rem;
            font-weight: 500;
            transition: background 0.2s, color 0.2s;
            white-space: nowrap;
        }
        .nav-menu a:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #f1c40f;
            text-decoration: none;
        }
        .nav-menu a i {
            margin-right: 5px;
        }
        .breadcrumb {
            background: #e9edf2;
            padding: 0.7rem 0;
            font-size: 0.85rem;
            border-bottom: 1px solid #dce1e8;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 0.8rem;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #7f8c8d;
            font-weight: 600;
        }
        .breadcrumb a {
            color: #2c3e50;
        }
        .breadcrumb .current {
            color: #7f8c8d;
            font-weight: 500;
        }
        main {
            padding: 2rem 0 3rem;
        }
        .hero-image {
            margin: 1.5rem 0 2rem;
            border-radius: 14px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.10);
            background: #dfe6e9;
        }
        .hero-image img {
            width: 100%;
            object-fit: cover;
            max-height: 460px;
        }
        .hero-caption {
            font-size: 0.85rem;
            color: #636e72;
            padding: 0.6rem 0.2rem 0;
            font-style: italic;
        }
        section {
            margin-bottom: 3rem;
        }
        .content-card {
            background: #fff;
            border-radius: 16px;
            padding: 2rem 2.2rem;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
            margin-bottom: 2rem;
            transition: box-shadow 0.2s;
        }
        .content-card:hover {
            box-shadow: 0 6px 30px rgba(0, 0, 0, 0.07);
        }
        .search-box {
            background: linear-gradient(135deg, #eef2f7, #fff);
            border: 1px solid #dce1e8;
            border-radius: 40px;
            padding: 0.3rem 0.3rem 0.3rem 1.5rem;
            display: flex;
            align-items: center;
            max-width: 520px;
            margin: 1.2rem 0 0.5rem;
            transition: box-shadow 0.25s, border-color 0.25s;
        }
        .search-box:focus-within {
            box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.15);
            border-color: #0066cc;
        }
        .search-box input {
            flex: 1;
            border: none;
            background: transparent;
            padding: 0.7rem 0.2rem;
            font-size: 0.95rem;
            outline: none;
            color: #1e2a3a;
        }
        .search-box button {
            background: #0066cc;
            color: #fff;
            border: none;
            border-radius: 40px;
            padding: 0.6rem 1.6rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            font-size: 0.9rem;
        }
        .search-box button:hover {
            background: #004999;
            transform: scale(0.97);
        }
        .comment-form,
        .rating-form {
            background: #f9fbfd;
            border-radius: 14px;
            padding: 1.6rem 1.8rem;
            border: 1px solid #e4e9f0;
            margin-top: 1.2rem;
        }
        .comment-form textarea,
        .comment-form input,
        .rating-form select {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 1px solid #d0d7e2;
            border-radius: 10px;
            font-size: 0.95rem;
            font-family: inherit;
            margin-bottom: 0.8rem;
            transition: border-color 0.2s;
            background: #fff;
        }
        .comment-form textarea:focus,
        .comment-form input:focus,
        .rating-form select:focus {
            border-color: #0066cc;
            outline: none;
            box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.08);
        }
        .comment-form textarea {
            min-height: 110px;
            resize: vertical;
        }
        .btn-submit {
            background: #e74c3c;
            color: #fff;
            border: none;
            padding: 0.7rem 2rem;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            font-size: 0.95rem;
            transition: background 0.2s, transform 0.1s;
        }
        .btn-submit:hover {
            background: #c0392b;
            transform: scale(0.97);
        }
        .btn-submit i {
            margin-right: 6px;
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            margin: 0.4rem 0 1rem;
            font-size: 1.7rem;
            color: #f1c40f;
            cursor: pointer;
        }
        .rating-stars i {
            transition: transform 0.15s, color 0.2s;
        }
        .rating-stars i:hover {
            transform: scale(1.2);
            color: #f39c12;
        }
        friend-link {
            display: block;
            background: #fff;
            border-radius: 14px;
            padding: 1.5rem 2rem;
            border: 1px solid #e4e9f0;
            margin: 2rem 0 1rem;
        }
        friend-link ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem 1.8rem;
            padding: 0;
            margin-top: 0.6rem;
        }
        friend-link li a {
            color: #2c3e50;
            font-weight: 500;
            padding: 0.2rem 0;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s, color 0.2s;
        }
        friend-link li a:hover {
            border-bottom-color: #e74c3c;
            color: #e74c3c;
            text-decoration: none;
        }
        friend-link .fl-title {
            font-weight: 700;
            font-size: 1.1rem;
            color: #0b1a2a;
            margin-bottom: 0.3rem;
        }
        footer {
            background: #0b1a2a;
            color: #cbd5e1;
            padding: 2.2rem 0 1.8rem;
            font-size: 0.9rem;
            margin-top: 2rem;
        }
        footer .footer-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
        }
        footer .copyright {
            color: #94a3b8;
            font-size: 0.85rem;
        }
        footer a {
            color: #f1c40f;
        }
        footer a:hover {
            color: #fff;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.35rem;
                padding-left: 0.7rem;
            }
            h3 {
                font-size: 1.1rem;
            }
            .content-card {
                padding: 1.2rem 1.2rem;
            }
            .header-inner {
                gap: 0.5rem;
            }
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                background: #0f2838;
                border-radius: 12px;
                padding: 0.6rem 0.2rem;
                margin-top: 0.6rem;
                gap: 0.1rem;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 0.6rem 1rem;
                border-radius: 4px;
            }
            .breadcrumb ol {
                font-size: 0.78rem;
                gap: 0.2rem 0.5rem;
            }
            .search-box {
                max-width: 100%;
                padding-left: 1rem;
                border-radius: 30px;
            }
            .search-box button {
                padding: 0.5rem 1.2rem;
                font-size: 0.8rem;
            }
            .hero-image img {
                max-height: 220px;
            }
            .rating-stars {
                font-size: 1.4rem;
            }
            friend-link ul {
                flex-direction: column;
                gap: 0.3rem;
            }
            footer .footer-inner {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (min-width: 769px) and (max-width: 1024px) {
            .content-card {
                padding: 1.6rem 1.8rem;
            }
            .hero-image img {
                max-height: 340px;
            }
        }
        .badge {
            display: inline-block;
            background: #e74c3c;
            color: #fff;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 0.15rem 0.7rem;
            border-radius: 30px;
            letter-spacing: 0.3px;
        }
        .highlight {
            background: #fff9e6;
            padding: 0.1rem 0.4rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .emoji-lg {
            font-size: 1.4rem;
        }
        .last-updated {
            display: inline-block;
            background: #eef2f7;
            padding: 0.3rem 1.2rem;
            border-radius: 30px;
            font-size: 0.8rem;
            color: #4a5a6a;
            margin-bottom: 1rem;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.2rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.9rem;
            background: #fff;
            border-radius: 10px;
            overflow: hidden;
        }
        th,
        td {
            padding: 0.7rem 1rem;
            border-bottom: 1px solid #e9edf2;
            text-align: left;
        }
        th {
            background: #f0f4f9;
            font-weight: 600;
            color: #1a2a3a;
        }
        tr:last-child td {
            border-bottom: none;
        }
        .tip-box {
            background: #e8f4fd;
            border-left: 5px solid #0066cc;
            padding: 1rem 1.4rem;
            border-radius: 0 12px 12px 0;
            margin: 1.2rem 0;
        }
        .tip-box strong {
            color: #004999;
        }
        .pro-tip {
            background: #fef9e7;
            border-left-color: #f1c40f;
        }
        .pro-tip strong {
            color: #b7950b;
        }
        .glossary-term {
            font-weight: 600;
            color: #8e44ad;
        }