*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            background: #f8f9fc;
            color: #1a1a2e;
            line-height: 1.8;
            padding: 0 1rem;
        }
        a {
            color: #e63946;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #b71c1c;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: #0b0b2a;
            margin-top: 2rem;
            margin-bottom: 1rem;
        }
        h1 {
            font-size: 2.4rem;
            border-left: 6px solid #e63946;
            padding-left: 1.2rem;
        }
        h2 {
            font-size: 1.8rem;
            border-bottom: 3px solid #e6394633;
            padding-bottom: 0.5rem;
        }
        h3 {
            font-size: 1.4rem;
            color: #1d3557;
        }
        h4 {
            font-size: 1.15rem;
            color: #2b2d42;
        }
        p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
        }
        ul,
        ol {
            margin: 1rem 0 1.5rem 2rem;
        }
        li {
            margin-bottom: 0.6rem;
        }
        strong {
            color: #1d3557;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: #ffffff;
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.05);
            border-radius: 24px;
            padding: 1.5rem 2rem 2rem;
        }
        header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 0 0.8rem;
            border-bottom: 2px solid #eee;
            position: relative;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 900;
            color: #e63946;
            letter-spacing: -1px;
            text-transform: uppercase;
            background: linear-gradient(135deg, #e63946, #f77f00);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .my-logo:hover {
            text-decoration: none;
            opacity: 0.85;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 2rem;
            color: #1a1a2e;
            cursor: pointer;
            padding: 0.2rem 0.6rem;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: #f0f0f5;
        }
        nav {
            display: flex;
            gap: 1.6rem;
            flex-wrap: wrap;
            align-items: center;
        }
        nav a {
            font-weight: 600;
            font-size: 0.95rem;
            color: #1a1a2e;
            padding: 0.3rem 0;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s, color 0.2s;
        }
        nav a:hover {
            border-bottom-color: #e63946;
            color: #e63946;
            text-decoration: none;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 0.8rem;
            font-size: 0.85rem;
            padding: 0.8rem 0 0.2rem;
            color: #555;
            width: 100%;
            margin-top: 0.5rem;
        }
        .breadcrumb a {
            color: #e63946;
            font-weight: 500;
        }
        .breadcrumb span {
            color: #888;
        }
        .hero-img {
            margin: 2rem 0 1.5rem;
            border-radius: 18px;
            overflow: hidden;
            background: #e9ecef;
            position: relative;
        }
        .hero-img img {
            width: 100%;
            max-height: 420px;
            object-fit: cover;
        }
        .hero-img .img-caption {
            background: rgba(0, 0, 0, 0.65);
            color: #fff;
            padding: 0.6rem 1.2rem;
            font-size: 0.9rem;
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
        }
        .update-badge {
            display: inline-block;
            background: #1d3557;
            color: #fff;
            padding: 0.25rem 1.2rem;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 600;
            margin: 0.5rem 0 1rem;
        }
        .search-box {
            background: #f1f3f8;
            border-radius: 60px;
            padding: 0.3rem 0.3rem 0.3rem 1.5rem;
            display: flex;
            align-items: center;
            max-width: 480px;
            margin: 1.5rem 0;
            border: 1px solid #ddd;
            transition: box-shadow 0.2s;
        }
        .search-box:focus-within {
            box-shadow: 0 0 0 3px #e6394633;
        }
        .search-box input {
            flex: 1;
            border: none;
            background: transparent;
            padding: 0.7rem 0;
            font-size: 1rem;
            outline: none;
        }
        .search-box button {
            background: #e63946;
            border: none;
            color: #fff;
            padding: 0.6rem 1.6rem;
            border-radius: 60px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            font-size: 0.95rem;
        }
        .search-box button:hover {
            background: #b71c1c;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin: 2.5rem 0;
        }
        @media (max-width:700px) {
            .feedback-grid {
                grid-template-columns: 1fr;
            }
        }
        .card-box {
            background: #f8f9fc;
            border-radius: 20px;
            padding: 1.8rem 2rem;
            border: 1px solid #e9ecef;
        }
        .card-box h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .card-box form {
            display: flex;
            flex-direction: column;
            gap: 0.9rem;
            margin-top: 1rem;
        }
        .card-box input,
        .card-box textarea,
        .card-box select {
            padding: 0.7rem 1rem;
            border: 1px solid #ccc;
            border-radius: 12px;
            font-size: 1rem;
            font-family: inherit;
            transition: border-color 0.2s;
            background: #fff;
        }
        .card-box input:focus,
        .card-box textarea:focus,
        .card-box select:focus {
            border-color: #e63946;
            outline: none;
            box-shadow: 0 0 0 3px #e6394622;
        }
        .card-box textarea {
            min-height: 90px;
            resize: vertical;
        }
        .card-box .btn-submit {
            background: #1d3557;
            color: #fff;
            border: none;
            padding: 0.7rem 1.6rem;
            border-radius: 60px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            align-self: flex-start;
            font-size: 1rem;
        }
        .card-box .btn-submit:hover {
            background: #0b1a2e;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.2rem;
            font-size: 1.8rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            cursor: pointer;
            color: #ddd;
            transition: color 0.15s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f4a261;
        }
        .code-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.8rem 0;
            font-size: 0.95rem;
            background: #fff;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
        }
        .code-table th {
            background: #1d3557;
            color: #fff;
            padding: 0.9rem 1.2rem;
            text-align: left;
            font-weight: 600;
        }
        .code-table td {
            padding: 0.8rem 1.2rem;
            border-bottom: 1px solid #eee;
        }
        .code-table tr:hover td {
            background: #f1f3f8;
        }
        .code-table .copy-btn {
            background: #e63946;
            color: #fff;
            border: none;
            padding: 0.3rem 1rem;
            border-radius: 40px;
            font-size: 0.8rem;
            cursor: pointer;
            transition: background 0.2s;
        }
        .code-table .copy-btn:hover {
            background: #b71c1c;
        }
        footer {
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 2px solid #eee;
            font-size: 0.9rem;
            color: #555;
        }
        friend-link {
            display: block;
            background: #f1f3f8;
            padding: 1.2rem 1.8rem;
            border-radius: 18px;
            margin: 1.5rem 0;
            font-weight: 500;
        }
        friend-link a {
            display: inline-block;
            margin: 0.2rem 1.2rem 0.2rem 0;
        }
        .copyright {
            text-align: center;
            padding: 1.2rem 0 0.5rem;
            font-size: 0.85rem;
            color: #777;
        }
        @media (max-width:768px) {
            body {
                padding: 0 0.5rem;
            }
            .container {
                padding: 1rem 1rem 1.5rem;
                border-radius: 16px;
            }
            h1 {
                font-size: 1.8rem;
                padding-left: 0.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            .nav-toggle {
                display: block;
            }
            nav {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 0.8rem;
                padding: 1rem 0 0.5rem;
                border-top: 1px solid #eee;
                margin-top: 0.8rem;
            }
            nav.open {
                display: flex;
            }
            .my-logo {
                font-size: 1.6rem;
            }
            .code-table {
                font-size: 0.8rem;
            }
            .code-table th,
            .code-table td {
                padding: 0.5rem 0.6rem;
            }
            .star-rating {
                font-size: 1.5rem;
            }
            .search-box {
                max-width: 100%;
                flex-wrap: wrap;
                padding: 0.3rem 0.3rem 0.3rem 1rem;
            }
            .search-box input {
                min-width: 120px;
            }
            .search-box button {
                padding: 0.5rem 1.2rem;
                font-size: 0.85rem;
            }
        }
        @media (max-width:480px) {
            h1 {
                font-size: 1.5rem;
            }
            .container {
                padding: 0.8rem;
            }
            .card-box {
                padding: 1.2rem;
            }
            .code-table {
                font-size: 0.7rem;
            }
            .code-table th,
            .code-table td {
                padding: 0.4rem 0.4rem;
            }
            .code-table .copy-btn {
                font-size: 0.65rem;
                padding: 0.2rem 0.7rem;
            }
        }
        .tag {
            display: inline-block;
            background: #e6394611;
            color: #e63946;
            padding: 0.15rem 1rem;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-right: 0.4rem;
        }
        .note-box {
            background: #fff3cd;
            border-left: 5px solid #ffc107;
            padding: 1rem 1.6rem;
            border-radius: 12px;
            margin: 1.5rem 0;
        }
        .insight-box {
            background: #d4edda;
            border-left: 5px solid #28a745;
            padding: 1rem 1.6rem;
            border-radius: 12px;
            margin: 1.5rem 0;
        }
        .flex-icon-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem 1.8rem;
            margin: 1rem 0;
        }
        .flex-icon-list i {
            color: #e63946;
            width: 1.6rem;
        }
        .skeleton-loading {
            background: linear-gradient(90deg, #eee 25%, #f5f5f5 50%, #eee 75%);
            background-size: 200% 100%;
            animation: shimmer 1.2s infinite;
            border-radius: 8px;
            height: 1.2rem;
            margin: 0.5rem 0;
        }
        @keyframes shimmer {
            0% {
                background-position: -200% 0;
            }
            100% {
                background-position: 200% 0;
            }
        }