*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
            background: #0b0d17;
            color: #e2e4f0;
            line-height: 1.7;
            padding: 0;
            margin: 0;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: #7cb8ff;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #b6d8ff;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin: 1rem 0;
        }
        li {
            margin-bottom: 0.4rem;
        }
        strong {
            color: #f0f4ff;
            font-weight: 700;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: #f0f4ff;
            margin-top: 2rem;
            margin-bottom: 0.8rem;
        }
        h1 {
            font-size: 2.6rem;
            margin-top: 0.5rem;
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: 2rem;
            border-left: 5px solid #6c5ce7;
            padding-left: 1rem;
            margin-top: 3rem;
        }
        h3 {
            font-size: 1.5rem;
            color: #c8d6ff;
            margin-top: 2.2rem;
        }
        h4 {
            font-size: 1.2rem;
            color: #a8b8ff;
            margin-top: 1.6rem;
            font-weight: 600;
        }
        p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #0f1224 0%, #1a1f40 100%);
            padding: 1rem 0;
            border-bottom: 2px solid #2d3566;
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.7rem;
            font-weight: 800;
            background: linear-gradient(135deg, #a78bfa, #60a5fa);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.03em;
            text-transform: uppercase;
            display: inline-block;
            padding: 0.2rem 0;
            transition: transform 0.2s;
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
        }
        .my-logo small {
            font-size: 0.7rem;
            -webkit-text-fill-color: #8892c0;
            display: block;
            font-weight: 400;
            letter-spacing: 0.2em;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid #4f5b9e;
            color: #e2e4f0;
            font-size: 1.6rem;
            padding: 0.3rem 0.8rem;
            border-radius: 8px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: #2d3566;
        }
        .nav-menu {
            display: flex;
            gap: 0.2rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .nav-menu a {
            padding: 0.5rem 1rem;
            border-radius: 30px;
            font-weight: 500;
            font-size: 0.9rem;
            color: #c8d0ff;
            transition: background 0.2s, color 0.2s;
            white-space: nowrap;
        }
        .nav-menu a:hover {
            background: #2d3566;
            color: #fff;
            text-decoration: none;
        }
        .nav-menu a.active {
            background: #6c5ce7;
            color: #fff;
        }
        .breadcrumb {
            padding: 0.8rem 0;
            font-size: 0.85rem;
            color: #8892b8;
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem;
        }
        .breadcrumb a {
            color: #7cb8ff;
        }
        .breadcrumb a:hover {
            color: #b6d8ff;
        }
        .breadcrumb span {
            margin: 0 0.3rem;
        }
        .hero-image-wrap {
            margin: 1.8rem 0 2.5rem;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
            position: relative;
        }
        .hero-image-wrap img {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
        }
        .hero-image-wrap .img-credit {
            position: absolute;
            bottom: 10px;
            right: 14px;
            background: rgba(0, 0, 0, 0.6);
            padding: 0.2rem 0.8rem;
            border-radius: 30px;
            font-size: 0.7rem;
            color: #c8d0ff;
        }
        .meta-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            align-items: center;
            padding: 0.8rem 0 1.2rem;
            border-bottom: 1px solid #2d3566;
            margin-bottom: 2rem;
            font-size: 0.9rem;
            color: #8892b8;
        }
        .meta-bar i {
            margin-right: 0.4rem;
            color: #6c5ce7;
        }
        .meta-bar .last-updated {
            font-weight: 600;
            color: #c8d0ff;
        }
        .search-section {
            background: #131730;
            padding: 1.8rem 2rem;
            border-radius: 16px;
            margin: 2rem 0;
            border: 1px solid #2d3566;
        }
        .search-section form {
            display: flex;
            gap: 0.8rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .search-section input[type="text"] {
            flex: 1;
            min-width: 200px;
            padding: 0.8rem 1.2rem;
            border-radius: 40px;
            border: 2px solid #2d3566;
            background: #0b0d17;
            color: #e2e4f0;
            font-size: 1rem;
            transition: border 0.2s;
        }
        .search-section input[type="text"]:focus {
            outline: none;
            border-color: #6c5ce7;
        }
        .search-section button {
            padding: 0.8rem 2rem;
            border-radius: 40px;
            border: none;
            background: #6c5ce7;
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-section button:hover {
            background: #7c6ff0;
            transform: scale(1.02);
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin: 2.5rem 0;
        }
        .feedback-card {
            background: #131730;
            padding: 1.8rem 2rem;
            border-radius: 16px;
            border: 1px solid #2d3566;
        }
        .feedback-card h3 {
            margin-top: 0;
            font-size: 1.3rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin-top: 0.8rem;
        }
        .feedback-card textarea,
        .feedback-card select {
            padding: 0.8rem 1rem;
            border-radius: 12px;
            border: 2px solid #2d3566;
            background: #0b0d17;
            color: #e2e4f0;
            font-size: 0.95rem;
            font-family: inherit;
            resize: vertical;
            transition: border 0.2s;
        }
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            outline: none;
            border-color: #6c5ce7;
        }
        .feedback-card textarea {
            min-height: 100px;
        }
        .feedback-card select {
            padding: 0.7rem 1rem;
            cursor: pointer;
        }
        .feedback-card .btn-submit {
            padding: 0.7rem 1.8rem;
            border-radius: 40px;
            border: none;
            background: #6c5ce7;
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            align-self: flex-start;
        }
        .feedback-card .btn-submit:hover {
            background: #7c6ff0;
            transform: scale(1.02);
        }
        .star-display {
            display: flex;
            gap: 0.2rem;
            font-size: 1.6rem;
            color: #fbbf24;
        }
        friend-link {
            display: block;
            background: #131730;
            padding: 1.5rem 2rem;
            border-radius: 16px;
            border: 1px solid #2d3566;
            margin: 2rem 0 1rem;
        }
        friend-link .fl-title {
            font-weight: 700;
            font-size: 1.1rem;
            color: #c8d0ff;
            margin-bottom: 0.8rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        friend-link .fl-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem 1.5rem;
        }
        friend-link .fl-grid a {
            padding: 0.3rem 0;
            font-size: 0.95rem;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s;
        }
        friend-link .fl-grid a:hover {
            border-bottom-color: #6c5ce7;
            text-decoration: none;
        }
        .site-footer {
            background: #0b0d17;
            padding: 2rem 0;
            border-top: 2px solid #2d3566;
            margin-top: 3rem;
            text-align: center;
            font-size: 0.9rem;
            color: #6b7299;
        }
        .site-footer .copy {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 0.5rem 2rem;
        }
        .site-footer a {
            color: #7cb8ff;
        }
        .toc {
            background: #131730;
            padding: 1.8rem 2rem;
            border-radius: 16px;
            border: 1px solid #2d3566;
            margin: 2rem 0;
        }
        .toc h3 {
            margin-top: 0;
            font-size: 1.3rem;
        }
        .toc ul {
            list-style: none;
            padding: 0;
            columns: 2;
            column-gap: 2rem;
        }
        .toc ul li {
            padding: 0.25rem 0;
            break-inside: avoid;
        }
        .toc ul li a {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.3rem 0;
            border-bottom: 1px solid transparent;
            transition: border-color 0.2s;
        }
        .toc ul li a:hover {
            border-bottom-color: #6c5ce7;
            text-decoration: none;
        }
        .toc ul li a .num {
            color: #6c5ce7;
            font-weight: 700;
            min-width: 1.8rem;
        }
        .highlight-box {
            background: linear-gradient(135deg, #1a1f40, #0f1224);
            border-left: 5px solid #6c5ce7;
            padding: 1.5rem 2rem;
            border-radius: 12px;
            margin: 1.8rem 0;
        }
        .highlight-box p:last-child {
            margin-bottom: 0;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 1.9rem;
            }
            h2 {
                font-size: 1.5rem;
                padding-left: 0.7rem;
            }
            h3 {
                font-size: 1.2rem;
            }
            h4 {
                font-size: 1.05rem;
            }
            .header-inner {
                flex-wrap: wrap;
            }
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                margin-top: 1rem;
                background: #131730;
                padding: 1rem;
                border-radius: 16px;
                gap: 0.3rem;
                border: 1px solid #2d3566;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 0.6rem 1rem;
                width: 100%;
            }
            .feedback-grid {
                grid-template-columns: 1fr;
            }
            .toc ul {
                columns: 1;
            }
            .search-section form {
                flex-direction: column;
            }
            .search-section input[type="text"] {
                width: 100%;
                min-width: unset;
            }
            .search-section button {
                width: 100%;
                justify-content: center;
            }
            .meta-bar {
                flex-direction: column;
                gap: 0.6rem;
                align-items: flex-start;
            }
            .hero-image-wrap img {
                max-height: 280px;
            }
            .my-logo {
                font-size: 1.3rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 12px;
            }
            h1 {
                font-size: 1.6rem;
            }
            .feedback-card {
                padding: 1.2rem;
            }
            .toc {
                padding: 1.2rem;
            }
            .highlight-box {
                padding: 1rem 1.2rem;
            }
        }
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #0b0d17;
        }
        ::-webkit-scrollbar-thumb {
            background: #2d3566;
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #4f5b9e;
        }
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .fade-section {
            animation: fadeInUp 0.6s ease forwards;
        }