*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: #f5f7fa;
            color: #1a1a2e;
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { color: #2d6a9f; text-decoration: none; transition: color 0.2s ease; }
        a:hover, a:focus { color: #1a3e6b; text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; border-radius: 8px; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: #0d1b2a; font-weight: 700; }
        h1 { font-size: 2.2rem; margin-bottom: 1.2rem; }
        h2 { font-size: 1.7rem; margin: 2.2rem 0 1rem; border-bottom: 3px solid #e0e7ef; padding-bottom: 0.5rem; }
        h3 { font-size: 1.3rem; margin: 1.8rem 0 0.8rem; color: #1b2838; }
        h4 { font-size: 1.1rem; margin: 1.2rem 0 0.5rem; color: #2c3e50; }
        p { margin-bottom: 1.1rem; }
        ul, ol { margin: 0.8rem 0 1.2rem 1.8rem; }
        li { margin-bottom: 0.4rem; }
        strong { color: #0d1b2a; font-weight: 700; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; width: 100%; }
        .site-header {
            background: linear-gradient(135deg, #0d1b2a 0%, #1b2a41 100%);
            color: #fff;
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0,0,0,0.2);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.5px;
            text-transform: uppercase;
            background: linear-gradient(90deg, #f9d423, #f7971e);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            transition: opacity 0.3s;
        }
        .my-logo:hover { opacity: 0.85; text-decoration: none; }
        .my-logo span { font-weight: 300; font-size: 1rem; display: block; -webkit-text-fill-color: #aac4e0; color: #aac4e0; letter-spacing: 2px; text-transform: none; }
        .nav-bar { display: flex; align-items: center; gap: 0.5rem; }
        .nav-list { display: flex; list-style: none; gap: 0.3rem; margin: 0; padding: 0; }
        .nav-list li a {
            color: #e0e7ef;
            padding: 0.5rem 0.9rem;
            border-radius: 6px;
            font-size: 0.92rem;
            font-weight: 500;
            transition: background 0.25s, color 0.25s;
            white-space: nowrap;
        }
        .nav-list li a:hover, .nav-list li a:focus {
            background: rgba(255,255,255,0.12);
            color: #fff;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 0.3rem 0.6rem;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .hamburger:hover { background: rgba(255,255,255,0.1); }
        #nav-toggle { display: none; }
        .breadcrumb {
            background: #eef2f7;
            padding: 0.7rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #dce3ec;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
            margin: 0;
            padding: 0 20px;
            max-width: 1200px;
            margin: 0 auto;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #7a8aa0;
            font-weight: 700;
        }
        .breadcrumb a { color: #2d6a9f; }
        .breadcrumb .current { color: #4a5a72; font-weight: 600; }
        .search-section {
            background: #fff;
            padding: 1.5rem 0;
            border-bottom: 1px solid #e0e7ef;
        }
        .search-form {
            display: flex;
            gap: 0.6rem;
            max-width: 600px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .search-form input {
            flex: 1;
            padding: 0.8rem 1.2rem;
            border: 2px solid #dce3ec;
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            transition: border 0.3s;
        }
        .search-form input:focus { border-color: #2d6a9f; }
        .search-form button {
            background: #2d6a9f;
            color: #fff;
            border: none;
            border-radius: 40px;
            padding: 0 1.6rem;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.25s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-form button:hover { background: #1a3e6b; }
        .main-content {
            flex: 1;
            padding: 2.2rem 0 3rem;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 2.5rem;
            align-items: start;
        }
        .article-body { background: #fff; padding: 2.2rem 2.5rem; border-radius: 14px; box-shadow: 0 2px 12px rgba(0,0,0,0.04); }
        .sidebar { background: #fff; padding: 1.8rem 1.6rem; border-radius: 14px; box-shadow: 0 2px 12px rgba(0,0,0,0.04); position: sticky; top: 100px; }
        .sidebar h3 { font-size: 1.2rem; margin-top: 0; border-bottom: 2px solid #eef2f7; padding-bottom: 0.6rem; }
        .sidebar ul { list-style: none; margin: 0.8rem 0 0; padding: 0; }
        .sidebar li { margin-bottom: 0.5rem; }
        .sidebar li a { display: block; padding: 0.4rem 0.6rem; border-radius: 6px; font-size: 0.92rem; transition: background 0.2s; }
        .sidebar li a:hover { background: #f0f4fa; text-decoration: none; }
        .featured-img {
            margin: 1.8rem 0;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 16px rgba(0,0,0,0.06);
        }
        .featured-img img { width: 100%; height: auto; }
        .featured-img figcaption { background: #f8fafc; padding: 0.8rem 1.2rem; font-size: 0.9rem; color: #4a5a72; border-top: 1px solid #eef2f7; }
        .interaction-area {
            margin-top: 3rem;
            padding-top: 1.8rem;
            border-top: 3px solid #eef2f7;
        }
        .rating-form, .comment-form {
            background: #f8fafc;
            padding: 1.5rem 1.8rem;
            border-radius: 12px;
            margin-bottom: 1.8rem;
        }
        .rating-form h3, .comment-form h3 { margin-top: 0; }
        .star-group { display: flex; gap: 0.3rem; font-size: 1.8rem; color: #ddd; cursor: pointer; margin: 0.6rem 0; }
        .star-group i { transition: color 0.2s; }
        .star-group i:hover, .star-group i.active { color: #f9a825; }
        .form-row { display: flex; flex-direction: column; gap: 0.8rem; }
        .form-row input, .form-row textarea {
            padding: 0.8rem 1rem;
            border: 2px solid #dce3ec;
            border-radius: 8px;
            font-size: 0.95rem;
            font-family: inherit;
            outline: none;
            transition: border 0.3s;
        }
        .form-row input:focus, .form-row textarea:focus { border-color: #2d6a9f; }
        .form-row textarea { min-height: 110px; resize: vertical; }
        .btn {
            background: #2d6a9f;
            color: #fff;
            border: none;
            padding: 0.7rem 1.8rem;
            border-radius: 40px;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.25s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .btn:hover { background: #1a3e6b; transform: translateY(-1px); }
        .btn-secondary { background: #6c7a8e; }
        .btn-secondary:hover { background: #4a5a72; }
        friend-link {
            display: block;
            background: #1b2a41;
            color: #c8d6e5;
            padding: 2rem 0;
            margin-top: 2rem;
        }
        friend-link .container {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem 2rem;
            justify-content: center;
            align-items: center;
        }
        friend-link a {
            color: #aac4e0;
            font-weight: 500;
            padding: 0.3rem 0.8rem;
            border-radius: 6px;
            transition: background 0.2s, color 0.2s;
        }
        friend-link a:hover { background: rgba(255,255,255,0.08); color: #fff; text-decoration: none; }
        .site-footer {
            background: #0d1b2a;
            color: #9aabbf;
            padding: 2rem 0 1.5rem;
            font-size: 0.9rem;
        }
        .footer-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .footer-inner .copyright { opacity: 0.8; }
        .footer-inner .copyright strong { color: #c8d6e5; }
        @media (max-width: 900px) {
            .content-grid { grid-template-columns: 1fr; }
            .sidebar { position: static; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #1b2a41;
                padding: 1rem 0;
                border-radius: 0 0 12px 12px;
                margin-top: 0.6rem;
                gap: 0;
            }
            .nav-list li a { display: block; padding: 0.7rem 1.2rem; border-radius: 0; }
            #nav-toggle:checked ~ .nav-list { display: flex; }
            .header-inner { position: relative; }
            #nav-toggle { display: none; }
            .article-body { padding: 1.5rem 1.2rem; }
            h1 { font-size: 1.7rem; }
            h2 { font-size: 1.4rem; }
            .search-form { flex-direction: column; }
            .search-form button { justify-content: center; padding: 0.8rem; }
            .footer-inner { flex-direction: column; text-align: center; }
        }
        @media (max-width: 480px) {
            .my-logo { font-size: 1.4rem; }
            .breadcrumb ol { font-size: 0.8rem; gap: 0.2rem 0.4rem; }
            .sidebar { padding: 1.2rem; }
        }
        .text-muted { color: #6c7a8e; }
        .mb-1 { margin-bottom: 1rem; }
        .mt-1 { margin-top: 1rem; }
        .flex-center { display: flex; align-items: center; gap: 0.6rem; }
        .last-updated { display: block; text-align: right; font-size: 0.85rem; color: #7a8aa0; margin-top: 1.5rem; border-top: 1px solid #eef2f7; padding-top: 0.8rem; }
        .toc { background: #f0f4fa; padding: 1.2rem 1.6rem; border-radius: 10px; margin: 1.5rem 0; }
        .toc ol { margin: 0.4rem 0 0 1.2rem; }
        .toc a { font-weight: 500; }
        .highlight-box { background: #eef7ff; border-left: 4px solid #2d6a9f; padding: 1rem 1.5rem; border-radius: 0 8px 8px 0; margin: 1.5rem 0; }
        .emoji-big { font-size: 1.3rem; }