*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #c62828;
            --primary-dark: #8e0000;
            --primary-light: #ff5f52;
            --gold: #f9a825;
            --gold-light: #ffd54f;
            --dark: #1a1a1a;
            --dark-soft: #2c2c2c;
            --light: #fafafa;
            --gray: #e0e0e0;
            --text: #222;
            --text-light: #555;
            --shadow: 0 8px 30px rgba(0, 0, 0, .12);
            --radius: 12px;
            --font: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
            --max-width: 1120px;
            --header-h: 70px;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font);
            background: var(--light);
            color: var(--text);
            line-height: 1.7;
            padding-top: var(--header-h);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .25s;
        }
        a:hover,
        a:focus-visible {
            color: var(--primary-dark);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
        }
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-h);
            background: var(--dark);
            color: #fff;
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(0, 0, 0, .3);
            display: flex;
            align-items: center;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
            gap: 16px;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--gold);
            letter-spacing: -.5px;
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            text-decoration: none !important;
        }
        .my-logo:hover {
            color: var(--gold-light);
        }
        .my-logo i {
            font-size: 1.8rem;
            color: var(--primary-light);
        }
        .my-logo span {
            font-size: .65rem;
            font-weight: 400;
            color: #aaa;
            letter-spacing: 0;
            display: block;
            line-height: 1.2;
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 6px;
            align-items: center;
        }
        .nav-list a {
            color: #ddd;
            padding: 6px 14px;
            border-radius: 30px;
            font-size: .9rem;
            font-weight: 500;
            transition: background .25s, color .25s;
            white-space: nowrap;
            text-decoration: none;
        }
        .nav-list a:hover,
        .nav-list a:focus-visible {
            background: rgba(255, 255, 255, .1);
            color: var(--gold);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background .2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, .08);
        }
        .breadcrumb-wrap {
            background: #f5f5f5;
            padding: 10px 0;
            border-bottom: 1px solid var(--gray);
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 6px 10px;
            font-size: .85rem;
            color: var(--text-light);
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 10px;
            color: #999;
        }
        .breadcrumb a {
            color: var(--text-light);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .current {
            color: var(--primary);
            font-weight: 600;
        }
        main {
            flex: 1;
            padding: 30px 0 50px;
        }
        .article-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            align-items: start;
        }
        @media(max-width:960px) {
            .article-wrapper {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }
        .article-content {
            min-width: 0;
        }
        .article-content h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.2;
            color: var(--dark);
            margin-bottom: 12px;
            letter-spacing: -.5px;
        }
        .article-content h1 i {
            color: var(--gold);
        }
        .article-content .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 30px;
            color: var(--text-light);
            font-size: .9rem;
            margin-bottom: 24px;
            border-bottom: 2px solid var(--gray);
            padding-bottom: 16px;
        }
        .article-content .meta i {
            margin-right: 6px;
            color: var(--primary-light);
        }
        .article-content h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-top: 48px;
            margin-bottom: 16px;
            color: var(--dark);
            border-left: 5px solid var(--primary);
            padding-left: 16px;
        }
        .article-content h3 {
            font-size: 1.35rem;
            font-weight: 600;
            margin-top: 32px;
            margin-bottom: 10px;
            color: var(--dark-soft);
        }
        .article-content h4 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-top: 22px;
            margin-bottom: 8px;
            color: var(--text-light);
        }
        .article-content p {
            margin-bottom: 18px;
            font-size: 1.02rem;
            color: #2e2e2e;
        }
        .article-content ul,
        .article-content ol {
            margin-bottom: 20px;
            padding-left: 24px;
            color: #2e2e2e;
        }
        .article-content li {
            margin-bottom: 6px;
        }
        .article-content blockquote {
            border-left: 4px solid var(--gold);
            background: #fff8e1;
            padding: 16px 22px;
            margin: 24px 0;
            border-radius: 0 var(--radius) var(--radius) 0;
            font-style: italic;
            color: #3e2c00;
        }
        .article-content .feature-img {
            margin: 28px 0;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            background: #eee;
            position: relative;
        }
        .article-content .feature-img img {
            width: 100%;
            object-fit: cover;
            aspect-ratio: 16/9;
            background: #ddd;
        }
        .article-content .feature-img figcaption {
            font-size: .82rem;
            color: var(--text-light);
            padding: 8px 12px;
            background: #f0f0f0;
            border-radius: 0 0 var(--radius) var(--radius);
        }
        .article-content .highlight-box {
            background: linear-gradient(135deg, #fff3e0, #ffe0b2);
            border: 1px solid #ffcc80;
            padding: 20px 24px;
            border-radius: var(--radius);
            margin: 24px 0;
        }
        .article-content .highlight-box strong {
            color: var(--primary-dark);
        }
        .article-content .link-list-inline {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 14px;
            margin: 16px 0 22px;
            padding: 0;
            list-style: none;
        }
        .article-content .link-list-inline li a {
            background: #f5f5f5;
            padding: 4px 14px;
            border-radius: 30px;
            font-size: .88rem;
            border: 1px solid #ddd;
            transition: background .2s, border-color .2s;
            text-decoration: none;
            color: var(--dark);
        }
        .article-content .link-list-inline li a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            text-decoration: none;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0 28px;
            font-size: .95rem;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(0, 0, 0, .06);
        }
        .article-content table th {
            background: var(--dark);
            color: #fff;
            padding: 12px 16px;
            text-align: left;
            font-weight: 600;
        }
        .article-content table td {
            padding: 10px 16px;
            border-bottom: 1px solid var(--gray);
            background: #fff;
        }
        .article-content table tr:last-child td {
            border-bottom: none;
        }
        .article-content table tr:hover td {
            background: #f9f9f9;
        }
        .sidebar {
            position: sticky;
            top: calc(var(--header-h) + 30px);
        }
        .sidebar-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 22px 20px;
            box-shadow: var(--shadow);
            margin-bottom: 24px;
            border: 1px solid var(--gray);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--dark);
            border-bottom: 2px solid var(--gold);
            padding-bottom: 8px;
        }
        .sidebar-link-list {
            list-style: none;
            padding: 0;
        }
        .sidebar-link-list li {
            margin-bottom: 6px;
        }
        .sidebar-link-list a {
            display: block;
            padding: 6px 10px;
            border-radius: 6px;
            background: #fafafa;
            font-size: .9rem;
            transition: background .2s, transform .15s;
            text-decoration: none;
            color: var(--dark);
            border-left: 3px solid transparent;
        }
        .sidebar-link-list a:hover {
            background: #fff3e0;
            border-left-color: var(--gold);
            transform: translateX(4px);
            text-decoration: none;
        }
        .sidebar-link-list a i {
            color: var(--primary-light);
            width: 20px;
            margin-right: 6px;
        }
        .interaction-area {
            margin-top: 50px;
            padding-top: 30px;
            border-top: 3px solid var(--gray);
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }
        @media(max-width:700px) {
            .interaction-area {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        .interaction-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 24px 22px;
            box-shadow: var(--shadow);
            border: 1px solid #eee;
        }
        .interaction-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--dark);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .interaction-card h3 i {
            color: var(--gold);
        }
        .interaction-card form {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .interaction-card input,
        .interaction-card textarea,
        .interaction-card select {
            width: 100%;
            padding: 12px 14px;
            border: 1px solid #ccc;
            border-radius: 8px;
            font-size: .95rem;
            font-family: var(--font);
            transition: border-color .2s, box-shadow .2s;
            background: #fafafa;
        }
        .interaction-card input:focus,
        .interaction-card textarea:focus,
        .interaction-card select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(198, 40, 40, .15);
            outline: none;
            background: #fff;
        }
        .interaction-card textarea {
            resize: vertical;
            min-height: 70px;
        }
        .interaction-card .btn {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 12px 24px;
            border-radius: 30px;
            font-weight: 600;
            font-size: .95rem;
            cursor: pointer;
            transition: background .25s, transform .15s;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        .interaction-card .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }
        .interaction-card .btn:active {
            transform: translateY(0);
        }
        .rating-stars {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 4px;
            margin: 6px 0 4px;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            font-size: 1.8rem;
            color: #ccc;
            cursor: pointer;
            transition: color .2s, transform .15s;
        }
        .rating-stars label:hover,
        .rating-stars label:hover~label,
        .rating-stars input:checked~label {
            color: var(--gold);
            transform: scale(1.1);
        }
        .rating-stars input:checked+label {
            color: var(--gold);
        }
        .site-footer {
            background: var(--dark);
            color: #ccc;
            padding: 36px 0 20px;
            margin-top: 40px;
        }
        .footer-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }
        @media(max-width:600px) {
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }
        .footer-inner h4 {
            color: var(--gold);
            font-size: 1.1rem;
            margin-bottom: 12px;
            font-weight: 600;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, .05);
            padding: 14px 18px;
            border-radius: var(--radius);
            margin-top: 6px;
        }
        friend-link a {
            color: #bbb;
            display: inline-block;
            margin: 2px 12px 2px 0;
            font-size: .9rem;
            transition: color .2s;
            text-decoration: none;
        }
        friend-link a:hover {
            color: var(--gold);
            text-decoration: underline;
        }
        .copyright {
            grid-column: 1 / -1;
            text-align: center;
            font-size: .85rem;
            color: #888;
            border-top: 1px solid #333;
            padding-top: 18px;
            margin-top: 10px;
        }
        .copyright i {
            color: var(--primary-light);
        }
        @media(max-width:800px) {
            .nav-list {
                position: fixed;
                top: var(--header-h);
                left: 0;
                width: 100%;
                background: var(--dark-soft);
                flex-direction: column;
                padding: 20px 24px;
                gap: 6px;
                transform: translateY(-120%);
                opacity: 0;
                transition: transform .35s ease, opacity .25s;
                box-shadow: 0 20px 30px rgba(0, 0, 0, .3);
                border-top: 1px solid #444;
                pointer-events: none;
                z-index: 999;
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-list a {
                font-size: 1.05rem;
                padding: 12px 16px;
                border-radius: 8px;
                width: 100%;
                text-align: center;
            }
            .hamburger {
                display: block;
            }
            .article-content h1 {
                font-size: 1.8rem;
            }
            .article-content h2 {
                font-size: 1.4rem;
            }
            .article-content h3 {
                font-size: 1.15rem;
            }
            .my-logo {
                font-size: 1.3rem;
            }
            .my-logo span {
                font-size: .55rem;
            }
            .sidebar {
                position: static;
            }
        }
        @media(max-width:480px) {
            .header-inner {
                padding: 0 12px;
                gap: 8px;
            }
            .my-logo {
                font-size: 1.1rem;
            }
            .my-logo i {
                font-size: 1.3rem;
            }
            .container {
                padding: 0 12px;
            }
            .article-content h1 {
                font-size: 1.5rem;
            }
            .interaction-card {
                padding: 16px;
            }
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }
        .text-gold {
            color: var(--gold);
        }
        .fw-700 {
            font-weight: 700;
        }
        .anchor-offset {
            scroll-margin-top: calc(var(--header-h) + 20px);
        }