*,
        *::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, sans-serif;
            line-height: 1.7;
            color: #1e1e2a;
            background: #faf9f7;
            padding: 0 1rem;
            max-width: 1280px;
            margin: 0 auto;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        a {
            color: #1a6b8a;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #0d3e52;
            text-decoration: underline;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            color: #0f2b3a;
            margin-bottom: 0.75rem;
            letter-spacing: -0.01em;
        }
        h2 {
            font-size: 2.0rem;
            font-weight: 700;
            line-height: 1.3;
            color: #133c4f;
            margin-top: 2.8rem;
            margin-bottom: 1rem;
            border-left: 5px solid #2d9bb3;
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.5rem;
            font-weight: 600;
            line-height: 1.4;
            color: #1d5a6e;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
            line-height: 1.5;
            color: #216f87;
            margin-top: 1.5rem;
            margin-bottom: 0.5rem;
        }
        p {
            margin-bottom: 1.25rem;
            font-size: 1.05rem;
            color: #2c2c3a;
        }
        .lead {
            font-size: 1.25rem;
            font-weight: 400;
            color: #3a3a4e;
            max-width: 800px;
        }
        strong {
            color: #0f2b3a;
            font-weight: 700;
        }
        em {
            font-style: italic;
            color: #2d6a7a;
        }
        hr {
            margin: 2.5rem 0;
            border: 0;
            height: 2px;
            background: linear-gradient(90deg, #d4e3e8, transparent);
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 1.2rem 0 0.8rem 0;
            border-bottom: 2px solid #dce8ed;
            position: relative;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            color: #0f2b3a;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, #1d7a8f, #0f4b5e);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            transition: opacity 0.2s;
        }
        .my-logo:hover {
            opacity: 0.8;
            text-decoration: none;
        }
        .my-logo i {
            -webkit-text-fill-color: #1d7a8f;
            margin-right: 6px;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 1.8rem;
            font-weight: 500;
            font-size: 0.95rem;
        }
        .nav-list a {
            color: #1e3e4e;
            padding: 0.3rem 0;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s, color 0.2s;
        }
        .nav-list a:hover {
            border-bottom-color: #2d9bb3;
            color: #0d3e52;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: #0f2b3a;
            cursor: pointer;
            padding: 0.2rem 0.5rem;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: #e8edf0;
        }
        .breadcrumb {
            padding: 0.8rem 0 0.2rem 0;
            font-size: 0.9rem;
            color: #5a6a72;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
        }
        .breadcrumb a {
            color: #1a6b8a;
        }
        .breadcrumb a:hover {
            color: #0d3e52;
        }
        .breadcrumb .sep {
            color: #8a9aa2;
        }
        .hero {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            align-items: center;
            padding: 2rem 0 1.5rem 0;
            background: #f0f5f7;
            border-radius: 20px;
            margin: 1.5rem 0 2rem 0;
            padding: 2rem 2.5rem;
        }
        .hero-text {
            flex: 1 1 300px;
        }
        .hero-img {
            flex: 1 1 280px;
            border-radius: 16px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
        }
        .hero-img img {
            width: 100%;
            border-radius: 16px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            margin: 2rem 0;
        }
        .content-main {
            min-width: 0;
        }
        .content-sidebar {
            position: sticky;
            top: 1.5rem;
            align-self: start;
        }
        .sidebar-card {
            background: #f0f5f8;
            border-radius: 16px;
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            border: 1px solid #e0eaef;
        }
        .sidebar-card h4 {
            margin-top: 0;
            font-size: 1.1rem;
            border-bottom: 2px solid #d4e3e8;
            padding-bottom: 0.5rem;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
        }
        .sidebar-card li {
            padding: 0.4rem 0;
            border-bottom: 1px solid #e4eef2;
        }
        .sidebar-card li:last-child {
            border-bottom: none;
        }
        .sidebar-card a {
            display: block;
            font-size: 0.92rem;
        }
        .search-form {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            margin: 1.2rem 0;
            background: #fff;
            padding: 1.2rem 1.5rem;
            border-radius: 14px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
            border: 1px solid #e4eef2;
        }
        .search-form input[type="text"] {
            flex: 1 1 200px;
            padding: 0.7rem 1rem;
            border: 1.5px solid #d4e3e8;
            border-radius: 10px;
            font-size: 1rem;
            background: #fafcfd;
            transition: border-color 0.2s;
        }
        .search-form input[type="text"]:focus {
            outline: none;
            border-color: #2d9bb3;
            background: #fff;
        }
        .search-form button {
            padding: 0.7rem 1.8rem;
            background: #1d7a8f;
            color: #fff;
            border: none;
            border-radius: 10px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
        }
        .search-form button:hover {
            background: #0f5b6e;
            transform: translateY(-1px);
        }
        .search-form button i {
            margin-right: 6px;
        }
        .feedback-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.8rem;
            margin: 2.5rem 0;
            padding: 1.8rem 2rem;
            background: #f0f5f8;
            border-radius: 18px;
            border: 1px solid #dce8ed;
        }
        .feedback-card {
            background: #fff;
            padding: 1.5rem;
            border-radius: 14px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
        }
        .feedback-card h3 {
            margin-top: 0;
            font-size: 1.3rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .feedback-card textarea,
        .feedback-card input[type="number"],
        .feedback-card input[type="text"] {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 1.5px solid #d4e3e8;
            border-radius: 10px;
            font-size: 0.95rem;
            font-family: inherit;
            background: #fafcfd;
            transition: border-color 0.2s;
            margin-bottom: 0.8rem;
        }
        .feedback-card textarea:focus,
        .feedback-card input:focus {
            outline: none;
            border-color: #2d9bb3;
            background: #fff;
        }
        .feedback-card textarea {
            min-height: 90px;
            resize: vertical;
        }
        .feedback-card .star-select {
            display: flex;
            gap: 0.3rem;
            font-size: 1.6rem;
            color: #d4dce0;
            cursor: pointer;
            margin-bottom: 0.8rem;
        }
        .feedback-card .star-select i.active {
            color: #f5b342;
        }
        .feedback-card button {
            padding: 0.6rem 1.6rem;
            background: #1d7a8f;
            color: #fff;
            border: none;
            border-radius: 10px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.2s;
        }
        .feedback-card button:hover {
            background: #0f5b6e;
        }
        .feedback-card .score-display {
            font-size: 2rem;
            font-weight: 700;
            color: #0f2b3a;
            margin: 0.3rem 0 0.6rem 0;
        }
        .link-inline-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem 1.2rem;
            padding: 0.8rem 0;
            list-style: none;
        }
        .link-inline-list li a {
            background: #eef4f7;
            padding: 0.3rem 0.9rem;
            border-radius: 20px;
            font-size: 0.9rem;
            border: 1px solid #dce8ed;
            transition: background 0.2s, border-color 0.2s;
        }
        .link-inline-list li a:hover {
            background: #dce8ef;
            border-color: #b8cdd8;
            text-decoration: none;
        }
        .toc {
            background: #f4f8fa;
            border-radius: 16px;
            padding: 1.5rem 2rem;
            margin: 1.8rem 0;
            border: 1px solid #e0eaef;
        }
        .toc h3 {
            margin-top: 0;
            font-size: 1.2rem;
        }
        .toc ol {
            padding-left: 1.5rem;
            columns: 2 240px;
            column-gap: 2rem;
        }
        .toc ol li {
            padding: 0.2rem 0;
            break-inside: avoid;
        }
        .toc ol li a {
            font-weight: 500;
        }
        .site-footer {
            margin-top: 3rem;
            padding: 2rem 0 1.5rem 0;
            border-top: 2px solid #dce8ed;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 1.5rem;
        }
        .site-footer friend-link {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem 1.8rem;
            font-size: 0.9rem;
        }
        .site-footer friend-link a {
            color: #1a6b8a;
        }
        .site-footer .copyright {
            font-size: 0.85rem;
            color: #5a6a72;
        }
        .update-time {
            font-size: 0.85rem;
            color: #6a7a82;
            margin: 0.5rem 0 1.2rem 0;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .update-time i {
            color: #2d9bb3;
        }
        @media (max-width: 820px) {
            h1 {
                font-size: 2.0rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            h3 {
                font-size: 1.25rem;
            }
            .content-grid {
                grid-template-columns: 1fr;
            }
            .content-sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }
            .feedback-section {
                grid-template-columns: 1fr;
            }
            .hero {
                padding: 1.5rem;
                flex-direction: column;
            }
            .hero-text {
                flex: 1 1 auto;
            }
            .hero-img {
                flex: 1 1 auto;
                width: 100%;
            }
            .site-header {
                flex-wrap: wrap;
            }
            .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                gap: 0.2rem;
                padding: 1rem 0 0.5rem 0;
                background: #faf9f7;
                border-top: 1px solid #dce8ed;
                margin-top: 0.8rem;
            }
            .nav-list.active {
                display: flex;
            }
            .nav-list a {
                padding: 0.6rem 0;
                border-bottom: 1px solid #e4eef2;
            }
            .hamburger {
                display: block;
            }
            .toc ol {
                columns: 1;
            }
            .site-footer {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        @media (max-width: 480px) {
            body {
                padding: 0 0.6rem;
            }
            h1 {
                font-size: 1.6rem;
            }
            h2 {
                font-size: 1.3rem;
            }
            .hero {
                padding: 1rem;
            }
            .feedback-section {
                padding: 1rem;
            }
            .feedback-card {
                padding: 1rem;
            }
            .search-form {
                padding: 1rem;
            }
            .content-sidebar {
                grid-template-columns: 1fr;
            }
            .my-logo {
                font-size: 1.4rem;
            }
        }
        .text-center {
            text-align: center;
        }
        .mt-1 {
            margin-top: 1rem;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }
        .flex-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
        }
        .badge {
            display: inline-block;
            background: #dce8ef;
            padding: 0.15rem 0.7rem;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 600;
            color: #1d5a6e;
        }