*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            background: #f5f7fa;
            color: #1a1a2e;
            line-height: 1.8;
            padding: 0;
            margin: 0;
        }
        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: 1.5rem;
            margin-bottom: 1.2rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #c0392b;
            line-height: 1.2;
            margin-bottom: 0.6rem;
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #1a1a2e;
            border-left: 5px solid #c0392b;
            padding-left: 1rem;
            margin: 2.2rem 0 1rem 0;
            line-height: 1.3;
        }
        h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: #2c3e50;
            margin: 1.6rem 0 0.8rem 0;
            line-height: 1.4;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
            color: #34495e;
            margin: 1.2rem 0 0.5rem 0;
            line-height: 1.5;
        }
        p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
            color: #2d3436;
        }
        strong,
        b {
            color: #c0392b;
            font-weight: 700;
        }
        .text-muted {
            color: #636e72;
            font-size: 0.92rem;
        }
        .text-small {
            font-size: 0.88rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .row {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
        }
        .col-8 {
            flex: 2 1 65%;
            min-width: 280px;
        }
        .col-4 {
            flex: 1 1 30%;
            min-width: 240px;
        }
        .site-header {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
            color: #fff;
            padding: 0.8rem 0;
            border-bottom: 4px solid #c0392b;
            position: relative;
            z-index: 100;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.8rem 1.5rem;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 900;
            color: #fff;
            letter-spacing: -0.03em;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            transition: transform 0.3s;
        }
        .my-logo:hover {
            transform: scale(1.02);
            color: #e74c3c;
            text-decoration: none;
        }
        .my-logo .logo-icon {
            font-size: 2.2rem;
            color: #e74c3c;
        }
        .my-logo .logo-sub {
            font-size: 0.75rem;
            font-weight: 400;
            opacity: 0.8;
            display: block;
            letter-spacing: 0.3px;
        }
        .nav-bar {
            display: flex;
            align-items: center;
            gap: 0.5rem 1.2rem;
            flex-wrap: wrap;
        }
        .nav-bar a {
            color: #ecf0f1;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.35rem 0.6rem;
            border-radius: 6px;
            transition: background 0.25s, color 0.25s;
            white-space: nowrap;
        }
        .nav-bar a:hover,
        .nav-bar a.active {
            background: rgba(192, 57, 43, 0.25);
            color: #ff6b6b;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: transparent;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.2rem 0.5rem;
            transition: transform 0.2s;
        }
        .hamburger:hover {
            transform: scale(1.1);
        }
        .nav-mobile {
            display: none;
            width: 100%;
            background: rgba(0, 0, 0, 0.3);
            border-radius: 12px;
            padding: 0.8rem 1rem;
            margin-top: 0.5rem;
            flex-direction: column;
            gap: 0.5rem;
        }
        .nav-mobile.open {
            display: flex;
        }
        .nav-mobile a {
            color: #ecf0f1;
            padding: 0.5rem 0.8rem;
            border-radius: 6px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .nav-mobile a:hover {
            background: rgba(192, 57, 43, 0.2);
        }
        .breadcrumb {
            background: #fff;
            padding: 0.6rem 0;
            border-bottom: 1px solid #dfe6e9;
            font-size: 0.9rem;
            color: #636e72;
        }
        .breadcrumb-inner {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.4rem;
        }
        .breadcrumb-inner a {
            color: #c0392b;
        }
        .breadcrumb-inner span {
            color: #2d3436;
        }
        .content-area {
            padding: 2.5rem 0 3rem;
        }
        .article-card {
            background: #fff;
            border-radius: 16px;
            padding: 2rem 2.2rem;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            margin-bottom: 2rem;
        }
        .article-card img {
            margin: 1.5rem 0;
            border-radius: 14px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
        }
        .last-updated {
            display: inline-block;
            background: #f1f2f6;
            padding: 0.3rem 1rem;
            border-radius: 30px;
            font-size: 0.85rem;
            color: #636e72;
            margin-bottom: 1rem;
        }
        .highlight-box {
            background: #fff3f0;
            border-left: 5px solid #c0392b;
            padding: 1.2rem 1.8rem;
            border-radius: 0 12px 12px 0;
            margin: 1.5rem 0;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 16px;
            padding: 1.5rem 1.8rem;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            margin-bottom: 1.8rem;
        }
        .sidebar-card h3 {
            font-size: 1.3rem;
            margin-top: 0;
            border-bottom: 2px solid #c0392b;
            padding-bottom: 0.5rem;
        }
        .link-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .link-list li {
            padding: 0.5rem 0;
            border-bottom: 1px solid #f0f0f0;
            margin: 0;
        }
        .link-list li a {
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .link-list li a i {
            width: 1.2rem;
            color: #c0392b;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 0.3rem;
            color: #2c3e50;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 2px solid #dfe6e9;
            border-radius: 10px;
            font-size: 1rem;
            font-family: inherit;
            transition: border 0.25s, box-shadow 0.25s;
            background: #fafafa;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            border-color: #c0392b;
            outline: none;
            box-shadow: 0 0 0 4px rgba(192, 57, 43, 0.12);
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .btn {
            padding: 0.7rem 2rem;
            border: none;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
        }
        .btn-primary {
            background: #c0392b;
            color: #fff;
        }
        .btn-primary:hover {
            background: #a93226;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(192, 57, 43, 0.3);
        }
        .btn-secondary {
            background: #2c3e50;
            color: #fff;
        }
        .btn-secondary:hover {
            background: #1a2a3a;
            transform: translateY(-2px);
        }
        .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 {
            color: #dfe6e9;
            cursor: pointer;
            transition: color 0.2s, transform 0.2s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f1c40f;
            transform: scale(1.05);
        }
        .site-footer {
            background: #1a1a2e;
            color: #b2bec3;
            padding: 2.5rem 0 1.5rem;
            border-top: 4px solid #c0392b;
        }
        .footer-inner {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            justify-content: space-between;
        }
        .footer-col {
            flex: 1 1 220px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1.1rem;
            border-bottom: 2px solid #c0392b;
            padding-bottom: 0.4rem;
            margin-bottom: 1rem;
        }
        friend-link {
            display: block;
            margin-top: 1rem;
            padding-top: 1rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        friend-link a {
            color: #dfe6e9;
            font-size: 0.95rem;
            display: inline-block;
            margin-right: 1.2rem;
            margin-bottom: 0.4rem;
        }
        friend-link a:hover {
            color: #e74c3c;
        }
        .copyright {
            text-align: center;
            padding-top: 1.8rem;
            margin-top: 1.8rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.9rem;
            color: #636e72;
        }
        .copyright strong {
            color: #ecf0f1;
        }
        @media (max-width: 900px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            h3 {
                font-size: 1.3rem;
            }
            .article-card {
                padding: 1.5rem;
            }
            .header-inner {
                flex-wrap: wrap;
            }
            .nav-bar {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .col-8,
            .col-4 {
                flex: 1 1 100%;
            }
        }
        @media (max-width: 540px) {
            h1 {
                font-size: 1.8rem;
            }
            .article-card {
                padding: 1rem;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .breadcrumb-inner {
                font-size: 0.8rem;
            }
            .star-rating {
                font-size: 1.5rem;
            }
            .footer-inner {
                flex-direction: column;
                gap: 1.2rem;
            }
        }
        .mt-1 {
            margin-top: 1rem;
        }
        .mt-2 {
            margin-top: 2rem;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }
        .mb-2 {
            margin-bottom: 2rem;
        }
        .flex {
            display: flex;
            align-items: center;
            gap: 0.8rem;
            flex-wrap: wrap;
        }
        .gap-1 {
            gap: 1rem;
        }
        .text-center {
            text-align: center;
        }
        .emoji-lg {
            font-size: 1.6rem;
        }