*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: #0b0e14;
            color: #e4e7ed;
            line-height: 1.7;
            padding: 0 1rem;
            max-width: 1400px;
            margin: 0 auto;
        }
        a {
            color: #66b0ff;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #a6d0ff;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        h1,
        h2,
        h3,
        h4 {
            font-weight: 600;
            line-height: 1.3;
            color: #f0f3fa;
            margin-top: 1.8rem;
            margin-bottom: 0.8rem;
        }
        h1 {
            font-size: 2.6rem;
            border-left: 6px solid #ffb347;
            padding-left: 1.2rem;
        }
        h2 {
            font-size: 2rem;
            border-bottom: 2px solid #2a3240;
            padding-bottom: 0.5rem;
        }
        h3 {
            font-size: 1.5rem;
            margin-top: 1.6rem;
        }
        h4 {
            font-size: 1.2rem;
            margin-top: 1.2rem;
            color: #ccd6e8;
        }
        p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
        }
        ul,
        ol {
            margin: 0.8rem 0 1.4rem 2rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        .container {
            background: #12171f;
            border-radius: 20px;
            padding: 1.8rem 2.2rem;
            margin: 1.2rem 0 2rem;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.6);
        }
        .badge {
            display: inline-block;
            background: #ffb347;
            color: #0b0e14;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 0.2rem 0.8rem;
            border-radius: 30px;
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }
        .text-muted {
            color: #8f9bb3;
        }
        .text-highlight {
            color: #ffb347;
            font-weight: 600;
        }
        hr {
            border: none;
            border-top: 1px solid #2a3240;
            margin: 2.2rem 0;
        }
        header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 1.2rem 0 0.6rem;
            border-bottom: 1px solid #232b36;
            position: relative;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            background: linear-gradient(135deg, #ffb347, #ff8a00);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .my-logo i {
            background: #1e2733;
            padding: 8px;
            border-radius: 12px;
            font-size: 1.4rem;
            -webkit-text-fill-color: #ffb347;
            color: #ffb347;
        }
        .my-logo small {
            font-size: 0.7rem;
            font-weight: 400;
            -webkit-text-fill-color: #8f9bb3;
            color: #8f9bb3;
            letter-spacing: 0.3px;
            margin-left: 4px;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 1.2rem;
        }
        nav#main-nav {
            display: flex;
            gap: 0.2rem;
            flex-wrap: wrap;
        }
        nav#main-nav a {
            padding: 0.5rem 1rem;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            color: #c8d0dd;
            transition: background 0.2s, color 0.2s;
        }
        nav#main-nav a:hover {
            background: #ffb347;
            color: #0b0e14;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: 2px solid #3a4555;
            color: #e4e7ed;
            font-size: 1.5rem;
            padding: 0.3rem 0.8rem;
            border-radius: 10px;
            cursor: pointer;
            transition: border-color 0.2s;
        }
        .hamburger:hover {
            border-color: #ffb347;
        }
        .hamburger i {
            pointer-events: none;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.8rem;
            list-style: none;
            padding: 0.6rem 0 0.2rem;
            font-size: 0.85rem;
            color: #7a88a0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #4a5870;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #7a88a0;
        }
        .breadcrumb a:hover {
            color: #ffb347;
        }
        .breadcrumb .current {
            color: #ffb347;
        }
        .search-bar {
            display: flex;
            gap: 0.4rem;
            margin: 1.2rem 0 0.8rem;
            max-width: 520px;
        }
        .search-bar input {
            flex: 1;
            padding: 0.7rem 1.2rem;
            border-radius: 40px;
            border: 2px solid #2a3240;
            background: #0d121b;
            color: #e4e7ed;
            font-size: 0.95rem;
            outline: none;
            transition: border-color 0.3s;
        }
        .search-bar input:focus {
            border-color: #ffb347;
        }
        .search-bar button {
            padding: 0.7rem 1.6rem;
            border-radius: 40px;
            border: none;
            background: #ffb347;
            color: #0b0e14;
            font-weight: 700;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .search-bar button:hover {
            background: #ffa01a;
            transform: scale(1.02);
        }
        .hero-img-wrap {
            margin: 1.6rem 0 2rem;
            position: relative;
            border-radius: 18px;
            overflow: hidden;
            background: #1a2330;
        }
        .hero-img-wrap img {
            width: 100%;
            max-height: 480px;
            object-fit: cover;
            opacity: 0.9;
        }
        .hero-img-wrap .img-credit {
            position: absolute;
            bottom: 8px;
            right: 12px;
            background: rgba(0, 0, 0, 0.65);
            padding: 0.2rem 1rem;
            border-radius: 30px;
            font-size: 0.75rem;
            color: #bcc6d4;
        }
        .toc {
            background: #1a2330;
            border-radius: 16px;
            padding: 1.6rem 2rem;
            margin: 1.8rem 0 2.4rem;
            border-left: 4px solid #ffb347;
        }
        .toc h3 {
            margin-top: 0;
            font-size: 1.3rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .toc ul {
            list-style: none;
            margin: 0.8rem 0 0;
            columns: 2 240px;
            column-gap: 2rem;
        }
        .toc li {
            padding: 0.2rem 0;
            break-inside: avoid;
        }
        .toc a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: #b6c5e0;
            font-weight: 400;
        }
        .toc a:hover {
            color: #ffb347;
        }
        .toc .toc-num {
            color: #ffb347;
            font-weight: 600;
            margin-right: 4px;
        }
        .link-group {
            background: #0d121b;
            border-radius: 14px;
            padding: 1.2rem 1.6rem;
            margin: 1.6rem 0;
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem 1.4rem;
            border: 1px solid #232b36;
        }
        .link-group a {
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 5px;
            color: #8fadff;
        }
        .link-group a:hover {
            color: #ffb347;
        }
        .link-group i {
            font-size: 0.7rem;
            color: #ffb347;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.8rem;
            margin: 2rem 0;
        }
        @media (max-width:700px) {
            .feedback-grid {
                grid-template-columns: 1fr;
            }
        }
        .card-form {
            background: #1a2330;
            border-radius: 16px;
            padding: 1.6rem 1.8rem;
            border: 1px solid #2a3240;
        }
        .card-form h4 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .card-form label {
            display: block;
            font-size: 0.9rem;
            font-weight: 500;
            margin: 0.8rem 0 0.3rem;
            color: #bcc6d4;
        }
        .card-form input,
        .card-form textarea,
        .card-form select {
            width: 100%;
            padding: 0.6rem 1rem;
            border-radius: 10px;
            border: 2px solid #2a3240;
            background: #0d121b;
            color: #e4e7ed;
            font-size: 0.95rem;
            outline: none;
            transition: border-color 0.3s;
            font-family: inherit;
        }
        .card-form input:focus,
        .card-form textarea:focus,
        .card-form select:focus {
            border-color: #ffb347;
        }
        .card-form textarea {
            min-height: 90px;
            resize: vertical;
        }
        .card-form .btn-submit {
            margin-top: 1rem;
            padding: 0.6rem 2rem;
            border-radius: 40px;
            border: none;
            background: #ffb347;
            color: #0b0e14;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .card-form .btn-submit:hover {
            background: #ffa01a;
            transform: scale(1.02);
        }
        .star-rating {
            display: flex;
            gap: 6px;
            font-size: 1.8rem;
            color: #3a4555;
            cursor: pointer;
            margin: 0.4rem 0 0.6rem;
        }
        .star-rating i {
            transition: color 0.2s, transform 0.1s;
        }
        .star-rating i:hover,
        .star-rating i.active {
            color: #ffb347;
            transform: scale(1.1);
        }
        footer {
            border-top: 1px solid #232b36;
            padding: 2.2rem 0 1.8rem;
            margin-top: 2.8rem;
        }
        footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
        }
        @media (max-width:700px) {
            footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
        }
        footer h5 {
            font-size: 1rem;
            color: #f0f3fa;
            margin-bottom: 0.6rem;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        footer a {
            color: #8f9bb3;
            font-size: 0.9rem;
            display: inline-block;
            margin-bottom: 0.3rem;
        }
        footer a:hover {
            color: #ffb347;
        }
        friend-link {
            display: block;
            margin: 1.2rem 0 0.6rem;
            padding: 1rem 1.4rem;
            background: #0d121b;
            border-radius: 14px;
            border: 1px solid #232b36;
            font-size: 0.9rem;
        }
        friend-link a {
            display: inline-block;
            margin-right: 1.4rem;
            margin-bottom: 0.3rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.4rem;
            margin-top: 1.4rem;
            border-top: 1px solid #1e2733;
            font-size: 0.85rem;
            color: #5f6d85;
        }
        .copyright strong {
            color: #bcc6d4;
        }
        @media (max-width: 820px) {
            body {
                padding: 0 0.6rem;
            }
            .container {
                padding: 1.2rem 1rem;
            }
            h1 {
                font-size: 2rem;
                padding-left: 0.8rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            h3 {
                font-size: 1.3rem;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .hamburger {
                display: inline-block;
            }
            nav#main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #12171f;
                padding: 1rem 0.6rem;
                border-radius: 16px;
                margin-top: 0.6rem;
                border: 1px solid #2a3240;
            }
            nav#main-nav.open {
                display: flex;
            }
            nav#main-nav a {
                padding: 0.6rem 1rem;
                border-radius: 10px;
            }
            .nav-wrapper {
                flex-wrap: wrap;
                justify-content: flex-end;
            }
            .toc ul {
                columns: 1;
            }
            .feedback-grid {
                grid-template-columns: 1fr;
            }
            .hero-img-wrap img {
                max-height: 240px;
            }
        }
        @media (min-width: 821px) {
            .hamburger {
                display: none !important;
            }
            nav#main-nav {
                display: flex !important;
            }
        }
        .stat-highlight {
            display: inline-block;
            background: #1e2a3a;
            padding: 0.2rem 1rem;
            border-radius: 40px;
            font-weight: 600;
            color: #ffb347;
            font-size: 0.9rem;
        }
        blockquote {
            border-left: 4px solid #ffb347;
            padding: 0.8rem 1.6rem;
            margin: 1.4rem 0;
            background: #0d121b;
            border-radius: 0 14px 14px 0;
            font-style: italic;
            color: #c8d0dd;
        }
        .update-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            color: #8f9bb3;
            background: #1a2330;
            padding: 0.2rem 1rem;
            border-radius: 30px;
        }