*,
        *::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, Roboto, 'Helvetica Neue', sans-serif;
            background: #0d0f14;
            color: #e8edf2;
            line-height: 1.75;
            padding: 0;
            margin: 0;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: #f5b342;
            text-decoration: none;
            transition: color 0.2s ease, text-shadow 0.2s ease;
        }
        a:hover {
            color: #ffd966;
            text-shadow: 0 0 8px rgba(245, 179, 66, 0.3);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        h1,
        h2,
        h3,
        h4 {
            font-weight: 600;
            line-height: 1.3;
            color: #f0f3f7;
            letter-spacing: 0.01em;
        }
        h1 {
            font-size: 2.4rem;
            margin-bottom: 0.75rem;
        }
        h2 {
            font-size: 1.8rem;
            margin-top: 2.8rem;
            margin-bottom: 0.6rem;
            border-left: 5px solid #f5b342;
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.35rem;
            margin-top: 2rem;
            margin-bottom: 0.5rem;
            color: #f5c87a;
        }
        h4 {
            font-size: 1.1rem;
            margin-top: 1.4rem;
            margin-bottom: 0.3rem;
            color: #d4a76a;
        }
        p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
        }
        ul,
        ol {
            margin: 0.8rem 0 1.4rem 1.8rem;
        }
        li {
            margin-bottom: 0.4rem;
        }
        strong {
            color: #ffd966;
            font-weight: 600;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .site-header {
            background: #141820;
            border-bottom: 2px solid #2a2f3a;
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(6px);
            background: rgba(20, 24, 32, 0.96);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.8rem;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            background: linear-gradient(135deg, #f5b342, #ff8a2b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
            text-shadow: 0 0 30px rgba(245, 179, 66, 0.15);
            display: inline-block;
        }
        .my-logo small {
            font-size: 1rem;
            font-weight: 400;
            -webkit-text-fill-color: #8899aa;
            background: none;
            color: #8899aa;
            margin-left: 0.3rem;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 1.8rem;
            flex-wrap: wrap;
        }
        .main-nav a {
            font-size: 0.95rem;
            font-weight: 500;
            color: #bcc8d6;
            padding: 0.3rem 0;
            border-bottom: 2px solid transparent;
            transition: border-color 0.25s, color 0.25s;
        }
        .main-nav a:hover {
            border-bottom-color: #f5b342;
            color: #fff;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #f5b342;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.2rem 0.6rem;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: #1e2430;
        }
        .nav-toggle .fa-times {
            display: none;
        }
        .nav-open .nav-toggle .fa-bars {
            display: none;
        }
        .nav-open .nav-toggle .fa-times {
            display: inline-block;
        }
        .breadcrumb {
            background: #1a1f29;
            padding: 0.6rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #2a2f3a;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 0.8rem;
            margin: 0;
            padding: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            color: #6a7a8a;
            margin-right: 0.6rem;
            font-size: 1.2rem;
        }
        .breadcrumb a {
            color: #8a9aaa;
        }
        .breadcrumb .current {
            color: #f5b342;
        }
        .hero-figure {
            margin: 2rem 0 1.5rem;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.6);
            background: #1a1f29;
            position: relative;
        }
        .hero-figure img {
            width: 100%;
            max-height: 480px;
            object-fit: cover;
        }
        .hero-figure figcaption {
            padding: 0.8rem 1.2rem;
            background: #141820cc;
            font-size: 0.9rem;
            color: #b0c0d0;
            border-top: 1px solid #2a2f3a;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            margin: 2rem 0;
        }
        .main-article {
            min-width: 0;
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
            background: #141820;
            border-radius: 16px;
            padding: 1.6rem 1.2rem;
            border: 1px solid #2a2f3a;
            max-height: calc(100vh - 140px);
            overflow-y: auto;
        }
        .sidebar h3 {
            font-size: 1.1rem;
            margin-top: 0;
            border-bottom: 2px solid #2a2f3a;
            padding-bottom: 0.5rem;
            margin-bottom: 1rem;
        }
        .sidebar ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .sidebar li {
            margin-bottom: 0.5rem;
        }
        .sidebar a {
            font-size: 0.95rem;
            display: block;
            padding: 0.3rem 0.5rem;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .sidebar a:hover {
            background: #1e2430;
        }
        .search-form {
            display: flex;
            gap: 0.5rem;
            margin: 1.8rem 0;
            flex-wrap: wrap;
        }
        .search-form input {
            flex: 1;
            min-width: 180px;
            padding: 0.7rem 1.2rem;
            border-radius: 40px;
            border: 2px solid #2a2f3a;
            background: #141820;
            color: #e8edf2;
            font-size: 1rem;
            outline: none;
            transition: border-color 0.3s;
        }
        .search-form input:focus {
            border-color: #f5b342;
        }
        .search-form button {
            background: #f5b342;
            border: none;
            border-radius: 40px;
            padding: 0.7rem 1.6rem;
            font-weight: 600;
            color: #0d0f14;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1rem;
        }
        .search-form button:hover {
            background: #ffc55a;
            transform: scale(1.02);
        }
        .feedback-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin: 2.5rem 0;
            padding: 1.8rem;
            background: #141820;
            border-radius: 20px;
            border: 1px solid #2a2f3a;
        }
        .feedback-section h3 {
            margin-top: 0;
            border-bottom: 2px solid #2a2f3a;
            padding-bottom: 0.5rem;
        }
        .feedback-form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .feedback-form input,
        .feedback-form textarea,
        .feedback-form select {
            padding: 0.7rem 1rem;
            border-radius: 10px;
            border: 2px solid #2a2f3a;
            background: #0d0f14;
            color: #e8edf2;
            font-size: 0.95rem;
            outline: none;
            transition: border-color 0.3s;
            font-family: inherit;
        }
        .feedback-form input:focus,
        .feedback-form textarea:focus,
        .feedback-form select:focus {
            border-color: #f5b342;
        }
        .feedback-form textarea {
            min-height: 100px;
            resize: vertical;
        }
        .feedback-form button {
            background: #f5b342;
            border: none;
            border-radius: 40px;
            padding: 0.7rem 1.6rem;
            font-weight: 600;
            color: #0d0f14;
            cursor: pointer;
            transition: background 0.25s;
            font-size: 1rem;
            align-self: flex-start;
        }
        .feedback-form button:hover {
            background: #ffc55a;
        }
        .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: #3a3f4a;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating input:checked~label,
        .star-rating label:hover,
        .star-rating label:hover~label {
            color: #f5b342;
        }
        friend-link {
            display: block;
            background: #141820;
            border-top: 2px solid #2a2f3a;
            padding: 2rem 0;
            margin-top: 2rem;
        }
        friend-link .flist {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem 2rem;
            justify-content: center;
            list-style: none;
            margin: 1rem 0 0;
            padding: 0;
        }
        friend-link .flist a {
            font-size: 0.95rem;
            padding: 0.2rem 0.6rem;
            border-radius: 6px;
            background: #1a1f29;
            transition: background 0.2s;
        }
        friend-link .flist a:hover {
            background: #2a2f3a;
        }
        .site-footer {
            background: #0a0c10;
            border-top: 1px solid #2a2f3a;
            padding: 1.8rem 0;
            text-align: center;
            font-size: 0.9rem;
            color: #6a7a8a;
            margin-top: auto;
        }
        .site-footer .copyright {
            margin-top: 0.6rem;
            letter-spacing: 0.3px;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                max-height: none;
                margin-top: 2rem;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 0.8rem;
                padding: 1rem 0 0.5rem;
                border-top: 1px solid #2a2f3a;
                margin-top: 0.8rem;
            }
            .nav-open .main-nav {
                display: flex;
            }
            .feedback-section {
                grid-template-columns: 1fr;
            }
            h1 {
                font-size: 1.7rem;
            }
            .header-inner {
                flex-wrap: wrap;
            }
            .my-logo {
                font-size: 1.6rem;
            }
            .search-form button span {
                display: none;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 0.9rem;
            }
            h1 {
                font-size: 1.4rem;
            }
            h2 {
                font-size: 1.25rem;
                padding-left: 0.7rem;
            }
            p {
                font-size: 0.98rem;
            }
            .hero-figure figcaption {
                font-size: 0.8rem;
                padding: 0.5rem 0.8rem;
            }
            .feedback-section {
                padding: 1rem;
            }
        }
        .last-update {
            display: inline-block;
            background: #1e2430;
            padding: 0.3rem 1rem;
            border-radius: 40px;
            font-size: 0.85rem;
            color: #8a9aaa;
            margin-bottom: 1.2rem;
        }
        .last-update i {
            margin-right: 0.4rem;
            color: #f5b342;
        }
        .toc-mobile {
            display: none;
            background: #141820;
            border-radius: 12px;
            padding: 1rem 1.2rem;
            margin-bottom: 1.8rem;
            border: 1px solid #2a2f3a;
        }
        .toc-mobile summary {
            font-weight: 600;
            cursor: pointer;
            color: #f5b342;
            font-size: 1.05rem;
        }
        .toc-mobile ul {
            margin: 0.8rem 0 0 1rem;
        }
        @media (max-width: 992px) {
            .toc-mobile {
                display: block;
            }
        }
        :target {
            scroll-margin-top: 90px;
        }