*,
        *::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: #f5f1ea;
            color: #2d2a24;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #4a7c59;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover,
        a:focus-visible {
            color: #2b5a3a;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.4rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            color: #1e3d2b;
            margin-top: 1.8rem;
            margin-bottom: 0.6rem;
        }
        h1 {
            font-size: 2.4rem;
            border-bottom: 3px solid #b58a4b;
            padding-bottom: 0.4rem;
        }
        h2 {
            font-size: 1.8rem;
            border-left: 5px solid #b58a4b;
            padding-left: 0.8rem;
        }
        h3 {
            font-size: 1.4rem;
            color: #2d5a3d;
        }
        h4 {
            font-size: 1.15rem;
            color: #3d6b4f;
        }
        p {
            margin-bottom: 1rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .site-header {
            background: linear-gradient(145deg, #1e3d2b 0%, #2d5a3d 100%);
            padding: 0.6rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px 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;
            letter-spacing: -0.5px;
            color: #f5e6c8;
            text-shadow: 2px 2px 0 #7a5a2e;
            transition: transform 0.2s;
            display: inline-block;
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
            color: #f5e6c8;
        }
        .my-logo i {
            color: #e6c229;
            margin-right: 0.3rem;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #f5e6c8;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.2rem 0.6rem;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .primary-nav {
            display: flex;
            gap: 0.2rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .primary-nav a {
            color: #e8dfd0;
            padding: 0.5rem 1rem;
            border-radius: 30px;
            font-size: 0.95rem;
            font-weight: 500;
            transition: background 0.25s, color 0.25s;
            white-space: nowrap;
        }
        .primary-nav a:hover,
        .primary-nav a:focus-visible {
            background: #b58a4b;
            color: #1e3d2b;
            text-decoration: none;
        }
        .primary-nav a i {
            margin-right: 0.3rem;
        }
        .breadcrumb {
            background: #e8e0d6;
            padding: 0.6rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 0.2rem;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin: 0 0.5rem;
            color: #7a6a5a;
        }
        .breadcrumb a {
            color: #4a7c59;
        }
        .breadcrumb .current {
            color: #2d2a24;
            font-weight: 600;
        }
        .hero {
            background: linear-gradient(135deg, #3d6b4f 0%, #1e3d2b 100%);
            color: #f5e6c8;
            padding: 3rem 0 2.5rem;
            text-align: center;
            border-bottom: 4px solid #b58a4b;
        }
        .hero h1 {
            color: #f5e6c8;
            border-bottom: none;
            font-size: 2.6rem;
            margin-top: 0;
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 720px;
            margin: 0.5rem auto 0;
            opacity: 0.92;
        }
        .hero .last-updated {
            display: inline-block;
            margin-top: 1rem;
            background: rgba(255, 255, 255, 0.12);
            padding: 0.3rem 1.2rem;
            border-radius: 30px;
            font-size: 0.9rem;
            backdrop-filter: blur(4px);
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2.5rem 0;
        }
        .main-article {
            min-width: 0;
        }
        .sidebar {
            position: sticky;
            top: 5.5rem;
            align-self: start;
        }
        .sidebar-card {
            background: #fffcf6;
            border-radius: 16px;
            padding: 1.5rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            margin-bottom: 1.5rem;
            border: 1px solid #e8dfd0;
        }
        .sidebar-card h3 {
            margin-top: 0;
            font-size: 1.2rem;
            border-bottom: 2px solid #b58a4b;
            padding-bottom: 0.4rem;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
        }
        .sidebar-card li {
            padding: 0.4rem 0;
            border-bottom: 1px solid #ece6dc;
        }
        .sidebar-card li:last-child {
            border-bottom: none;
        }
        .sidebar-card a {
            font-weight: 500;
        }
        .feature-image {
            border-radius: 16px;
            overflow: hidden;
            margin: 2rem 0;
            box-shadow: 0 6px 30px rgba(0, 0, 0, 0.1);
            background: #e8dfd0;
        }
        .feature-image img {
            width: 100%;
            object-fit: cover;
            max-height: 500px;
        }
        .feature-image figcaption {
            padding: 0.6rem 1.2rem;
            background: #f5f1ea;
            font-size: 0.9rem;
            color: #5a4a3a;
            font-style: italic;
        }
        .search-box {
            background: #fffcf6;
            border-radius: 60px;
            display: flex;
            overflow: hidden;
            border: 2px solid #dcd3c6;
            transition: border-color 0.3s;
            max-width: 500px;
            margin: 1.8rem auto;
        }
        .search-box:focus-within {
            border-color: #b58a4b;
        }
        .search-box input {
            flex: 1;
            border: none;
            padding: 0.8rem 1.4rem;
            font-size: 1rem;
            background: transparent;
            outline: none;
            color: #2d2a24;
        }
        .search-box button {
            background: #b58a4b;
            border: none;
            color: #fff;
            padding: 0 1.6rem;
            font-size: 1.1rem;
            cursor: pointer;
            transition: background 0.25s;
        }
        .search-box button:hover {
            background: #9a7340;
        }
        .feedback-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin: 3rem 0;
        }
        .feedback-card {
            background: #fffcf6;
            border-radius: 16px;
            padding: 1.8rem;
            border: 1px solid #e8dfd0;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
        }
        .feedback-card h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .feedback-card textarea,
        .feedback-card input,
        .feedback-card select {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 1.5px solid #dcd3c6;
            border-radius: 10px;
            font-size: 0.95rem;
            background: #faf8f4;
            transition: border-color 0.25s;
            font-family: inherit;
        }
        .feedback-card textarea:focus,
        .feedback-card input:focus,
        .feedback-card select:focus {
            border-color: #b58a4b;
            outline: none;
        }
        .feedback-card textarea {
            min-height: 100px;
            resize: vertical;
        }
        .feedback-card .btn {
            background: #4a7c59;
            color: #fff;
            border: none;
            padding: 0.7rem 1.6rem;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            align-self: flex-start;
        }
        .feedback-card .btn:hover {
            background: #2d5a3d;
            transform: scale(1.02);
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.2rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.8rem;
            color: #dcd3c6;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating input:checked~label,
        .star-rating label:hover,
        .star-rating label:hover~label {
            color: #e6c229;
        }
        .site-footer {
            background: #1e3d2b;
            color: #d4cdbe;
            padding: 2.5rem 0 1.2rem;
            margin-top: 3rem;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
        }
        .site-footer h4 {
            color: #e6c229;
            margin-top: 0;
        }
        .site-footer a {
            color: #c4b89a;
        }
        .site-footer a:hover {
            color: #f5e6c8;
        }
        friend-link {
            display: block;
            margin-top: 1.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid #3d6b4f;
        }
        friend-link a {
            display: inline-block;
            margin: 0.2rem 0.6rem 0.2rem 0;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            margin-top: 1.5rem;
            border-top: 1px solid #3d6b4f;
            font-size: 0.9rem;
            color: #a89a8a;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .primary-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                padding: 1rem 0 0.5rem;
                gap: 0.2rem;
            }
            .primary-nav.open {
                display: flex;
            }
            .primary-nav a {
                padding: 0.6rem 1rem;
                border-radius: 8px;
            }
            .header-inner {
                align-items: center;
            }
            .hero h1 {
                font-size: 1.9rem;
            }
            .feedback-section {
                grid-template-columns: 1fr;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.2rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 0.8rem;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
        }
        .highlight {
            background: #fdf6e3;
            padding: 0.1rem 0.4rem;
            border-radius: 4px;
        }
        .badge {
            display: inline-block;
            background: #b58a4b;
            color: #fff;
            padding: 0.15rem 0.8rem;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .toc {
            background: #faf8f4;
            border-radius: 12px;
            padding: 1.2rem 1.8rem;
            border: 1px solid #e8dfd0;
            margin: 1.5rem 0;
        }
        .toc ul {
            columns: 2;
            column-gap: 2rem;
            list-style: none;
            padding: 0;
        }
        .toc li {
            padding: 0.2rem 0;
            break-inside: avoid;
        }
        .toc a {
            font-weight: 500;
        }
        @media (max-width: 600px) {
            .toc ul {
                columns: 1;
            }
        }
        .pro-tip {
            background: #e8f0e4;
            border-left: 5px solid #4a7c59;
            padding: 1rem 1.5rem;
            border-radius: 0 12px 12px 0;
            margin: 1.5rem 0;
        }
        .pro-tip i {
            color: #4a7c59;
            margin-right: 0.5rem;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.2rem 0;
        }
        th,
        td {
            padding: 0.6rem 1rem;
            border: 1px solid #dcd3c6;
            text-align: left;
        }
        th {
            background: #e8dfd0;
            font-weight: 600;
        }
        tr:nth-child(even) {
            background: #faf8f4;
        }