*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            line-height: 1.7;
            color: #1e2a2f;
            background: #f7f9fb;
            padding: 0 16px;
            max-width: 1280px;
            margin: 0 auto;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: #0a6e7a;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover {
            color: #064a52;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.4rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            margin-top: 1.6rem;
            margin-bottom: 0.6rem;
            color: #0b2a30;
            font-weight: 700;
            letter-spacing: -0.01em;
        }
        h1 {
            font-size: 2.4rem;
            margin-top: 0.4rem;
            border-bottom: 4px solid #0a6e7a;
            padding-bottom: 0.4rem;
            display: inline-block;
        }
        h2 {
            font-size: 1.8rem;
            border-left: 5px solid #0a6e7a;
            padding-left: 0.8rem;
            margin-top: 2.4rem;
        }
        h3 {
            font-size: 1.35rem;
            margin-top: 1.6rem;
        }
        h4 {
            font-size: 1.1rem;
            margin-top: 1.2rem;
            font-weight: 600;
        }
        p {
            margin-bottom: 1rem;
        }
        strong,
        b {
            color: #084a52;
            font-weight: 700;
        }
        .container {
            background: #ffffff;
            border-radius: 24px;
            padding: 24px 28px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
            margin: 16px 0 24px;
            flex: 1;
        }
        @media (max-width: 640px) {
            body {
                padding: 0 8px;
            }
            .container {
                padding: 16px 14px;
                border-radius: 16px;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.35rem;
            }
            h3 {
                font-size: 1.15rem;
            }
        }
        header {
            padding: 12px 0 4px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 8px 16px;
            background: #f7f9fb;
        }
        .my-logo {
            font-size: 1.7rem;
            font-weight: 800;
            color: #0a6e7a;
            letter-spacing: -0.03em;
            background: linear-gradient(135deg, #0a6e7a, #0d8a96);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .my-logo i {
            -webkit-text-fill-color: #0a6e7a;
            font-size: 1.5rem;
        }
        .my-logo small {
            font-size: 0.7rem;
            font-weight: 400;
            -webkit-text-fill-color: #4a6a72;
            opacity: 0.8;
            letter-spacing: 0.3px;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: #0a6e7a;
            cursor: pointer;
            padding: 4px 8px;
            transition: transform 0.2s;
        }
        .nav-toggle:hover {
            transform: scale(1.1);
        }
        .nav-bar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px 20px;
            transition: all 0.3s ease;
        }
        .nav-bar a {
            font-weight: 500;
            padding: 6px 0;
            border-bottom: 2px solid transparent;
            transition: border-color 0.25s, color 0.25s;
            color: #1e2a2f;
        }
        .nav-bar a:hover {
            border-bottom-color: #0a6e7a;
            text-decoration: none;
            color: #0a6e7a;
        }
        .nav-bar a.active {
            border-bottom-color: #0a6e7a;
            color: #0a6e7a;
        }
        .breadcrumb {
            width: 100%;
            font-size: 0.85rem;
            color: #4a6a72;
            padding: 4px 0 8px;
            display: flex;
            flex-wrap: wrap;
            gap: 4px 10px;
            border-bottom: 1px solid #e2e8ee;
            margin-bottom: 8px;
        }
        .breadcrumb i {
            margin: 0 2px;
            color: #7a9aa5;
        }
        .breadcrumb a {
            color: #0a6e7a;
        }
        .breadcrumb span {
            color: #2a4a52;
        }
        @media (max-width: 720px) {
            .nav-toggle {
                display: inline-block;
            }
            .nav-bar {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                gap: 4px 0;
                padding: 8px 0 12px;
                background: #ffffff;
                border-radius: 16px;
                box-shadow: 0 6px 20px rgba(0, 0, 0, 0.06);
                padding: 12px 16px;
                margin-top: 4px;
            }
            .nav-bar.open {
                display: flex;
            }
            .nav-bar a {
                width: 100%;
                padding: 8px 0;
                border-bottom: 1px solid #edf2f5;
            }
        }
        .search-wrap {
            display: flex;
            gap: 6px;
            max-width: 480px;
            margin: 20px 0 24px;
            flex-wrap: wrap;
        }
        .search-wrap input {
            flex: 1;
            min-width: 160px;
            padding: 12px 16px;
            border: 2px solid #d5e0e6;
            border-radius: 40px;
            font-size: 0.95rem;
            background: #f7fafc;
            transition: border-color 0.3s, box-shadow 0.3s;
            outline: none;
        }
        .search-wrap input:focus {
            border-color: #0a6e7a;
            box-shadow: 0 0 0 4px rgba(10, 110, 122, 0.12);
        }
        .search-wrap button {
            padding: 12px 24px;
            border: none;
            border-radius: 40px;
            background: #0a6e7a;
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .search-wrap button:hover {
            background: #064a52;
            transform: scale(1.02);
        }
        .search-wrap button i {
            font-size: 1rem;
        }
        .featured-img {
            margin: 24px 0 28px;
            border-radius: 16px;
            overflow: hidden;
            background: #e8f0f3;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
        }
        .featured-img img {
            width: 100%;
            max-height: 460px;
            object-fit: cover;
        }
        .featured-img figcaption {
            padding: 12px 18px;
            font-size: 0.9rem;
            color: #2a4a52;
            background: #f0f6f9;
            border-top: 1px solid #dce7ed;
        }
        .interact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin: 32px 0 16px;
            padding-top: 20px;
            border-top: 2px solid #e2e8ee;
        }
        .interact-card {
            background: #f7fafc;
            border-radius: 18px;
            padding: 20px 22px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
            border: 1px solid #e8f0f3;
        }
        .interact-card h3 {
            margin-top: 0;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .interact-card textarea,
        .interact-card input,
        .interact-card select {
            width: 100%;
            padding: 10px 14px;
            border: 2px solid #d5e0e6;
            border-radius: 12px;
            font-size: 0.9rem;
            font-family: inherit;
            background: #fff;
            transition: border-color 0.3s;
            outline: none;
            margin-top: 6px;
        }
        .interact-card textarea:focus,
        .interact-card input:focus,
        .interact-card select:focus {
            border-color: #0a6e7a;
        }
        .interact-card textarea {
            min-height: 80px;
            resize: vertical;
        }
        .interact-card .btn {
            margin-top: 10px;
            padding: 10px 24px;
            border: none;
            border-radius: 30px;
            background: #0a6e7a;
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .interact-card .btn:hover {
            background: #064a52;
            transform: scale(1.02);
        }
        .score-stars {
            display: flex;
            gap: 6px;
            font-size: 1.8rem;
            color: #d5e0e6;
            cursor: pointer;
            margin: 6px 0 8px;
            flex-wrap: wrap;
        }
        .score-stars i {
            transition: color 0.2s, transform 0.15s;
        }
        .score-stars i:hover,
        .score-stars i.active {
            color: #f5b342;
            transform: scale(1.1);
        }
        @media (max-width: 640px) {
            .interact-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .score-stars {
                font-size: 1.5rem;
            }
        }
        .link-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
            gap: 10px 16px;
            margin: 20px 0 24px;
            padding: 16px 20px;
            background: #f0f6f9;
            border-radius: 18px;
            border: 1px solid #dce7ed;
        }
        .link-grid a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 4px 0;
            font-weight: 500;
        }
        .link-grid a i {
            color: #0a6e7a;
            width: 1.2rem;
            font-size: 0.85rem;
        }
        footer {
            margin: 32px 0 16px;
            padding: 24px 0 12px;
            border-top: 2px solid #dce7ed;
            text-align: center;
            font-size: 0.9rem;
            color: #4a6a72;
        }
        friend-link {
            display: block;
            padding: 16px 0 12px;
            font-size: 0.95rem;
            line-height: 1.8;
        }
        friend-link a {
            margin: 0 10px;
            font-weight: 500;
        }
        .copyright {
            font-size: 0.82rem;
            color: #6a8a95;
            padding-top: 8px;
            border-top: 1px solid #e8f0f3;
            margin-top: 12px;
        }
        .copyright i {
            margin: 0 4px;
        }
        .update-badge {
            display: inline-block;
            background: #e1f0f3;
            color: #064a52;
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .emoji-lg {
            font-size: 1.3rem;
            margin-right: 4px;
        }
        .blockquote {
            border-left: 4px solid #0a6e7a;
            padding: 12px 20px;
            background: #f4f9fb;
            border-radius: 0 12px 12px 0;
            margin: 1.2rem 0;
            font-style: italic;
            color: #1e3a42;
        }
        .blockquote strong {
            font-style: normal;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 12px;
            margin: 16px 0;
        }
        .stat-card {
            background: #f0f6f9;
            border-radius: 14px;
            padding: 14px 16px;
            text-align: center;
            border: 1px solid #dce7ed;
        }
        .stat-card .num {
            font-size: 1.6rem;
            font-weight: 800;
            color: #0a6e7a;
        }
        .stat-card .label {
            font-size: 0.8rem;
            color: #4a6a72;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .toc {
            background: #f4f9fb;
            border-radius: 16px;
            padding: 16px 22px;
            margin: 20px 0 24px;
            border: 1px solid #dce7ed;
        }
        .toc ol {
            columns: 2 220px;
            column-gap: 32px;
            list-style: none;
            counter-reset: toc-counter;
        }
        .toc ol li {
            counter-increment: toc-counter;
            margin-bottom: 4px;
            break-inside: avoid;
        }
        .toc ol li::before {
            content: counter(toc-counter) ". ";
            color: #0a6e7a;
            font-weight: 700;
        }
        .toc a {
            font-weight: 500;
        }
        @media (max-width: 480px) {
            .toc ol {
                columns: 1;
            }
        }
        @media (max-width: 420px) {
            .container {
                padding: 12px 10px;
            }
            .my-logo {
                font-size: 1.3rem;
            }
            .search-wrap button {
                padding: 10px 16px;
                font-size: 0.85rem;
            }
            .search-wrap input {
                padding: 10px 14px;
                font-size: 0.85rem;
            }
        }