*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: #f7f9fc;
            color: #1a1a2e;
            line-height: 1.7;
            font-size: 16px;
            padding: 0 16px;
        }
        a {
            color: #0057b3;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #ff6f00;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        h1,
        h2,
        h3,
        h4 {
            font-weight: 700;
            line-height: 1.3;
            color: #0d1b2a;
        }
        h1 {
            font-size: 2.2rem;
            margin-bottom: 0.75rem;
        }
        h2 {
            font-size: 1.8rem;
            margin: 2.5rem 0 1rem 0;
            border-left: 5px solid #ff6f00;
            padding-left: 18px;
        }
        h3 {
            font-size: 1.35rem;
            margin: 2rem 0 0.75rem 0;
            color: #1b3a4b;
        }
        h4 {
            font-size: 1.1rem;
            margin: 1.5rem 0 0.5rem 0;
            color: #2c3e50;
        }
        p {
            margin-bottom: 1.2rem;
        }
        ul,
        ol {
            margin-bottom: 1.2rem;
            padding-left: 1.8rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        hr {
            border: 0;
            border-top: 2px dashed #d0d7de;
            margin: 2.5rem 0;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 12px;
        }
        header {
            background: linear-gradient(135deg, #0d1b2a 0%, #1b3a4b 100%);
            color: #fff;
            padding: 18px 0;
            border-radius: 0 0 24px 24px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #ffb347, #ff6f00);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: none;
            transition: transform 0.2s;
        }
        .my-logo:hover {
            transform: scale(1.02);
        }
        .my-logo i {
            -webkit-text-fill-color: initial;
            color: #ffb347;
            margin-right: 6px;
        }
        .my-logo a {
            color: inherit;
            text-decoration: none;
            -webkit-text-fill-color: inherit;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .main-nav {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px 18px;
        }
        .main-nav a {
            color: #e0e8f0;
            font-weight: 500;
            padding: 6px 0;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s, color 0.2s;
        }
        .main-nav a:hover {
            color: #ffb347;
            border-bottom-color: #ffb347;
            text-decoration: none;
        }
        .main-nav .nav-active {
            color: #ffb347;
            border-bottom-color: #ffb347;
        }
        .breadcrumb {
            background: #eef2f6;
            padding: 10px 18px;
            border-radius: 30px;
            margin: 16px 0 20px 0;
            font-size: 0.9rem;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
            align-items: center;
            color: #4a5a6a;
        }
        .breadcrumb i {
            margin-right: 4px;
            color: #ff6f00;
        }
        .breadcrumb a {
            color: #0057b3;
        }
        .breadcrumb a:hover {
            color: #ff6f00;
        }
        .breadcrumb .sep {
            color: #9aa8b5;
        }
        .search-section {
            background: #fff;
            border-radius: 20px;
            padding: 28px 24px;
            margin: 24px 0;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
            border: 1px solid #e4e9f0;
        }
        .search-section h2 {
            margin-top: 0;
            border-left-color: #0057b3;
        }
        .search-form {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            max-width: 700px;
        }
        .search-form input {
            flex: 1 1 240px;
            padding: 14px 20px;
            border: 2px solid #d0d7de;
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            transition: border-color 0.2s, box-shadow 0.2s;
            background: #fafcff;
        }
        .search-form input:focus {
            border-color: #ff6f00;
            box-shadow: 0 0 0 4px rgba(255, 111, 0, 0.15);
        }
        .search-form button {
            background: #0d1b2a;
            color: #fff;
            border: none;
            padding: 14px 32px;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.15s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-form button:hover {
            background: #ff6f00;
            transform: translateY(-2px);
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 36px;
            margin: 28px 0;
        }
        .content-main {
            background: #fff;
            border-radius: 24px;
            padding: 32px 28px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            border: 1px solid #eef2f6;
        }
        .content-sidebar {
            background: #fff;
            border-radius: 24px;
            padding: 28px 20px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            border: 1px solid #eef2f6;
            align-self: start;
            position: sticky;
            top: 100px;
        }
        .content-sidebar h3 {
            margin-top: 0;
            font-size: 1.2rem;
            border-bottom: 3px solid #ff6f00;
            padding-bottom: 8px;
        }
        .sidebar-links {
            list-style: none;
            padding-left: 0;
        }
        .sidebar-links li {
            padding: 8px 0;
            border-bottom: 1px solid #edf2f7;
        }
        .sidebar-links a {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 500;
        }
        .sidebar-links a i {
            color: #ff6f00;
            width: 18px;
            text-align: center;
        }
        .featured-image {
            margin: 1.8rem 0;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
        }
        .featured-image img {
            width: 100%;
            max-height: 420px;
            object-fit: cover;
        }
        .featured-image figcaption {
            background: #f0f4fa;
            padding: 12px 18px;
            font-size: 0.9rem;
            color: #3a4a5a;
            text-align: center;
        }
        .highlight-box {
            background: linear-gradient(135deg, #fef9ee, #fff6e5);
            border-left: 6px solid #ff6f00;
            padding: 20px 24px;
            border-radius: 14px;
            margin: 1.8rem 0;
        }
        .highlight-box strong {
            color: #b35100;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.8rem 0;
            font-size: 0.95rem;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
        }
        .data-table th {
            background: #0d1b2a;
            color: #fff;
            padding: 14px 16px;
            text-align: left;
            font-weight: 600;
        }
        .data-table td {
            padding: 12px 16px;
            border-bottom: 1px solid #e9eef3;
            background: #fafcff;
        }
        .data-table tr:last-child td {
            border-bottom: none;
        }
        .data-table tr:hover td {
            background: #fef7ed;
        }
        .feedback-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin: 2.5rem 0;
        }
        .feedback-card {
            background: #f8faff;
            border-radius: 20px;
            padding: 24px 22px;
            border: 1px solid #e4eaf2;
        }
        .feedback-card h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .feedback-card h3 i {
            color: #ff6f00;
        }
        .feedback-form textarea,
        .feedback-form input {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid #d0d7de;
            border-radius: 12px;
            font-size: 1rem;
            font-family: inherit;
            resize: vertical;
            transition: border-color 0.2s;
            background: #fff;
        }
        .feedback-form textarea:focus,
        .feedback-form input:focus {
            border-color: #ff6f00;
            outline: none;
        }
        .feedback-form textarea {
            min-height: 90px;
        }
        .feedback-form .form-row {
            margin-bottom: 14px;
        }
        .feedback-form button {
            background: #ff6f00;
            color: #fff;
            border: none;
            padding: 12px 28px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.15s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .feedback-form button:hover {
            background: #e05e00;
            transform: translateY(-2px);
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 4px;
            font-size: 1.8rem;
            margin: 8px 0 14px 0;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            cursor: pointer;
            color: #d0d7de;
            transition: color 0.15s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #ffb347;
        }
        friend-link {
            display: block;
            background: #0d1b2a;
            color: #e0e8f0;
            padding: 28px 24px;
            border-radius: 20px;
            margin: 32px 0 20px 0;
            text-align: center;
        }
        friend-link a {
            color: #ffb347;
            font-weight: 600;
            margin: 0 12px;
        }
        friend-link a:hover {
            color: #fff;
            text-decoration: underline;
        }
        friend-link .fl-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        footer {
            background: #0d1b2a;
            color: #b0c4d8;
            padding: 32px 0 24px;
            border-radius: 24px 24px 0 0;
            margin-top: 40px;
        }
        .footer-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 20px;
            align-items: center;
        }
        .footer-inner p {
            margin: 0;
        }
        .footer-inner a {
            color: #ffb347;
        }
        .footer-inner a:hover {
            color: #fff;
        }
        .copyright {
            font-size: 0.9rem;
            opacity: 0.8;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .content-sidebar {
                position: static;
            }
            .feedback-section {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background: rgba(13, 27, 42, 0.98);
                padding: 16px 12px;
                border-radius: 16px;
                margin-top: 10px;
                gap: 4px;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 10px 12px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            }
            .main-nav a:last-child {
                border-bottom: none;
            }
            .header-inner {
                align-items: center;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            .content-main {
                padding: 20px 16px;
            }
            .data-table {
                font-size: 0.85rem;
            }
            .data-table th,
            .data-table td {
                padding: 10px 10px;
            }
            .search-form button {
                padding: 12px 20px;
            }
            .breadcrumb {
                font-size: 0.8rem;
                padding: 8px 14px;
            }
        }
        @media (max-width: 480px) {
            body {
                padding: 0 8px;
            }
            .container {
                padding: 0 4px;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .feedback-card {
                padding: 16px 14px;
            }
            .star-rating {
                font-size: 1.5rem;
            }
        }
        .emoji-xl {
            font-size: 2.2rem;
        }
        .tag {
            display: inline-block;
            background: #eef2f6;
            padding: 2px 14px;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 600;
            color: #1b3a4b;
        }
        .last-updated {
            display: inline-block;
            background: #e8edf4;
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 0.85rem;
            color: #3a4a5a;
            margin-bottom: 16px;
        }
        .last-updated i {
            margin-right: 6px;
            color: #ff6f00;
        }
        .toc {
            background: #f4f7fc;
            border-radius: 16px;
            padding: 18px 22px;
            margin: 1.2rem 0 2rem 0;
        }
        .toc ol {
            margin: 0;
            padding-left: 1.4rem;
        }
        .toc a {
            font-weight: 500;
        }
        .btn-back-top {
            display: inline-block;
            background: #0d1b2a;
            color: #fff;
            padding: 8px 20px;
            border-radius: 40px;
            font-size: 0.9rem;
            transition: background 0.2s;
            margin-top: 12px;
        }
        .btn-back-top:hover {
            background: #ff6f00;
            color: #fff;
            text-decoration: none;
        }