* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            background: #f5f7fa;
            color: #1a1a2e;
            line-height: 1.7;
            font-size: 16px;
            padding: 0 16px;
        }
        a {
            color: #c0392b;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover,
        a:focus {
            color: #e74c3c;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.4rem;
            margin-bottom: 1.2rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: #0b0b1a;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
        }
        h1 {
            font-size: 2.2rem;
            border-left: 6px solid #c0392b;
            padding-left: 18px;
            margin-top: 0.5rem;
        }
        h2 {
            font-size: 1.75rem;
            border-bottom: 2px solid #e0e0e0;
            padding-bottom: 6px;
        }
        h3 {
            font-size: 1.35rem;
        }
        h4 {
            font-size: 1.1rem;
            font-weight: 600;
        }
        p {
            margin-bottom: 1.2rem;
        }
        hr {
            border: none;
            border-top: 2px dashed #ccc;
            margin: 2.5rem 0;
        }
        .container {
            max-width: 1120px;
            margin: 0 auto;
            background: #ffffff;
            border-radius: 20px;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
            padding: 20px 24px 40px;
        }
        @media (min-width: 768px) {
            .container {
                padding: 30px 48px 50px;
            }
            body {
                padding: 20px 32px;
            }
            h1 {
                font-size: 2.8rem;
            }
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 12px 0 16px;
            border-bottom: 3px solid #c0392b;
            margin-bottom: 20px;
            position: relative;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(145deg, #c0392b, #e74c3c);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: 0 2px 8px rgba(192, 57, 43, 0.15);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .my-logo i {
            -webkit-text-fill-color: #c0392b;
            font-size: 1.6rem;
        }
        .my-logo a {
            text-decoration: none;
            color: inherit;
            background: none;
            -webkit-text-fill-color: inherit;
        }
        .my-logo a:hover {
            text-decoration: none;
        }
        .site-header .my-logo a {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .main-nav {
            display: none;
            flex-direction: column;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            background: #ffffff;
            border-radius: 0 0 16px 16px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
            padding: 16px 24px 24px;
            z-index: 999;
            border-top: 2px solid #c0392b;
        }
        .main-nav.active {
            display: flex;
        }
        .main-nav a {
            padding: 10px 0;
            font-weight: 600;
            color: #1a1a2e;
            border-bottom: 1px solid #f0f0f0;
            font-size: 1rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .main-nav a:last-child {
            border-bottom: none;
        }
        .main-nav a:hover {
            color: #c0392b;
            text-decoration: none;
        }
        .hamburger {
            background: none;
            border: none;
            font-size: 1.6rem;
            color: #1a1a2e;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: #f0f0f0;
        }
        @media (min-width: 768px) {
            .hamburger {
                display: none !important;
            }
            .main-nav {
                display: flex !important;
                position: static;
                flex-direction: row;
                background: transparent;
                box-shadow: none;
                padding: 0;
                border-top: none;
                gap: 4px;
            }
            .main-nav a {
                border-bottom: none;
                padding: 8px 16px;
                border-radius: 30px;
                font-size: 0.95rem;
            }
            .main-nav a:hover {
                background: #fce8e6;
            }
        }
        .breadcrumb {
            font-size: 0.85rem;
            color: #666;
            padding: 8px 0 12px;
            display: flex;
            flex-wrap: wrap;
            gap: 4px 8px;
            list-style: none;
        }
        .breadcrumb li {
            display: inline;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 8px;
            color: #aaa;
        }
        .breadcrumb a {
            color: #c0392b;
        }
        .search-box {
            background: #f0f2f5;
            border-radius: 50px;
            display: flex;
            align-items: center;
            padding: 4px 4px 4px 18px;
            max-width: 480px;
            margin: 20px 0 28px;
            border: 1px solid #e0e0e0;
            transition: box-shadow 0.3s;
        }
        .search-box:focus-within {
            box-shadow: 0 0 0 3px rgba(192, 57, 43, 0.2);
            border-color: #c0392b;
        }
        .search-box input {
            flex: 1;
            border: none;
            background: transparent;
            padding: 12px 0;
            font-size: 1rem;
            outline: none;
            color: #1a1a2e;
        }
        .search-box input::placeholder {
            color: #999;
        }
        .search-box button {
            background: #c0392b;
            border: none;
            color: #fff;
            padding: 10px 22px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.25s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-box button:hover {
            background: #a93226;
        }
        .feature-box {
            background: #fafafa;
            border-radius: 16px;
            padding: 20px 22px;
            margin-bottom: 2rem;
            border-left: 6px solid #c0392b;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
        }
        .feature-box h3 {
            margin-top: 0;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin: 1.5rem 0;
        }
        .stat-card {
            background: #fff;
            border-radius: 14px;
            padding: 18px 16px;
            text-align: center;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
            border: 1px solid #eee;
            transition: transform 0.2s;
        }
        .stat-card:hover {
            transform: translateY(-3px);
        }
        .stat-card .num {
            font-size: 2rem;
            font-weight: 800;
            color: #c0392b;
            display: block;
        }
        .stat-card .label {
            font-size: 0.85rem;
            color: #666;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        @media (min-width: 600px) {
            .stat-grid {
                grid-template-columns: repeat(4, 1fr);
            }
        }
        .link-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 16px;
            list-style: none;
            padding: 0;
            margin: 1rem 0 1.5rem;
        }
        .link-list li {
            margin: 0;
        }
        .link-list a {
            background: #f5f0eb;
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            display: inline-block;
            border: 1px solid #e0d6ce;
        }
        .link-list a:hover {
            background: #c0392b;
            color: #fff;
            border-color: #c0392b;
            text-decoration: none;
        }
        .image-wrap {
            margin: 2rem 0;
            border-radius: 14px;
            overflow: hidden;
            background: #f0f0f0;
            position: relative;
        }
        .image-wrap img {
            width: 100%;
            object-fit: cover;
            min-height: 200px;
            max-height: 480px;
        }
        .image-wrap figcaption {
            padding: 12px 18px;
            font-size: 0.85rem;
            color: #555;
            background: #fafafa;
            border-top: 1px solid #eaeaea;
        }
        .form-card {
            background: #f8f9fc;
            border-radius: 16px;
            padding: 24px 22px;
            margin: 2rem 0 1.8rem;
            border: 1px solid #e8e8f0;
        }
        .form-card h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .form-group {
            margin-bottom: 1rem;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            font-size: 0.95rem;
            margin-bottom: 4px;
            color: #2c2c3a;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 16px;
            border-radius: 10px;
            border: 1px solid #d0d0d8;
            font-size: 0.95rem;
            font-family: inherit;
            background: #fff;
            transition: border 0.2s, box-shadow 0.2s;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: #c0392b;
            box-shadow: 0 0 0 3px rgba(192, 57, 43, 0.12);
            outline: none;
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .btn {
            background: #c0392b;
            color: #fff;
            border: none;
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn:hover {
            background: #a93226;
            transform: scale(0.98);
        }
        .btn-outline {
            background: transparent;
            color: #c0392b;
            border: 2px solid #c0392b;
        }
        .btn-outline:hover {
            background: #c0392b;
            color: #fff;
        }
        .rating-stars {
            display: flex;
            gap: 6px;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
        }
        .rating-stars i {
            transition: color 0.2s, transform 0.15s;
        }
        .rating-stars i.active,
        .rating-stars i:hover {
            color: #f1c40f;
        }
        .rating-stars i:hover~i {
            color: #ddd;
        }
        .site-footer {
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 3px solid #e0e0e0;
            font-size: 0.9rem;
            color: #555;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
        }
        @media (min-width: 700px) {
            .site-footer .footer-grid {
                grid-template-columns: 2fr 1fr 1fr;
            }
        }
        .site-footer h4 {
            margin-top: 0;
            font-size: 1rem;
            color: #1a1a2e;
        }
        friend-link {
            display: block;
            padding: 6px 0;
            border-bottom: 1px solid #f0f0f0;
        }
        friend-link a {
            font-weight: 500;
        }
        .copyright {
            text-align: center;
            padding-top: 1.8rem;
            margin-top: 1.5rem;
            border-top: 1px solid #eaeaea;
            font-size: 0.82rem;
            color: #888;
        }
        .copyright strong {
            color: #444;
        }
        .badge {
            display: inline-block;
            background: #c0392b;
            color: #fff;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 2px 10px;
            border-radius: 30px;
            letter-spacing: 0.3px;
            text-transform: uppercase;
        }
        .quote {
            font-style: italic;
            background: #f9f3f0;
            padding: 16px 22px;
            border-radius: 14px;
            border-left: 5px solid #c0392b;
            margin: 1.5rem 0;
            color: #2c2c3a;
        }
        .quote cite {
            display: block;
            margin-top: 8px;
            font-style: normal;
            font-weight: 600;
            color: #c0392b;
        }
        .emoji-big {
            font-size: 1.8rem;
        }
        .last-updated {
            font-size: 0.85rem;
            color: #999;
            display: flex;
            align-items: center;
            gap: 6px;
            margin-bottom: 1.2rem;
        }
        .toc {
            background: #f8f4f2;
            border-radius: 14px;
            padding: 18px 24px;
            margin-bottom: 2rem;
        }
        .toc ol {
            margin-bottom: 0;
        }
        .toc a {
            color: #1a1a2e;
        }
        .toc a:hover {
            color: #c0392b;
        }
        .highlight {
            background: linear-gradient(to right, #fff3f0, #ffe8e4);
            padding: 0 6px;
            border-radius: 4px;
            font-weight: 600;
        }
        .two-col {
            display: grid;
            grid-template-columns: 1fr;
            gap: 24px;
            margin: 1.5rem 0;
        }
        @media (min-width: 640px) {
            .two-col {
                grid-template-columns: 1fr 1fr;
            }
        }
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: #c0392b;
            color: #fff;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            box-shadow: 0 6px 20px rgba(192, 57, 43, 0.3);
            transition: transform 0.2s, opacity 0.3s;
            opacity: 0.7;
            z-index: 100;
        }
        .back-top:hover {
            transform: translateY(-4px);
            opacity: 1;
            color: #fff;
            text-decoration: none;
        }
        @media (max-width: 480px) {
            .back-top {
                width: 40px;
                height: 40px;
                font-size: 1.1rem;
                bottom: 18px;
                right: 18px;
            }
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.5rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.92rem;
        }
        th,
        td {
            padding: 12px 14px;
            text-align: left;
            border-bottom: 1px solid #eaeaea;
        }
        th {
            background: #f5f0eb;
            font-weight: 700;
            color: #1a1a2e;
        }
        tr:hover td {
            background: #fdfaf8;
        }