*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            line-height: 1.7;
            color: #1e2a3a;
            background: #f8fafc;
            padding: 0;
            margin: 0;
        }
        a { color: #1a6ea0; text-decoration: none; transition: color 0.2s; }
        a:hover { color: #0b3d5c; text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; border-radius: 12px; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        .site-header {
            background: linear-gradient(145deg, #0f1a2e, #1b2a44);
            color: #fff;
            padding: 0 0 4px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0,0,0,0.25);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 14px 20px;
            max-width: 1200px;
            margin: 0 auto;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #f5d061, #f0b34b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: 0 2px 8px rgba(245,208,97,0.2);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i { font-size: 2rem; -webkit-text-fill-color: #f5d061; color: #f5d061; }
        .my-logo:hover { opacity: 0.9; text-decoration: none; }
        .my-logo span { font-weight: 300; font-size: 0.9rem; -webkit-text-fill-color: rgba(255,255,255,0.5); color: rgba(255,255,255,0.5); letter-spacing: 1px; }
        .main-nav { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
        .main-nav a {
            color: rgba(255,255,255,0.8);
            padding: 8px 16px;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: all 0.25s;
            white-space: nowrap;
        }
        .main-nav a:hover, .main-nav a.active { background: rgba(255,255,255,0.12); color: #f5d061; text-decoration: none; }
        .main-nav a i { margin-right: 6px; font-size: 0.85rem; }
        .hamburger { display: none; background: none; border: none; color: #fff; font-size: 1.8rem; cursor: pointer; padding: 4px 8px; border-radius: 8px; }
        .hamburger:hover { background: rgba(255,255,255,0.08); }
        #nav-toggle { display: none; }
        .breadcrumb-wrap {
            background: rgba(255,255,255,0.04);
            backdrop-filter: blur(4px);
            padding: 8px 20px;
            border-top: 1px solid rgba(255,255,255,0.06);
        }
        .breadcrumb {
            max-width: 1200px;
            margin: 0 auto;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.6);
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            align-items: center;
        }
        .breadcrumb a { color: rgba(255,255,255,0.7); }
        .breadcrumb a:hover { color: #f5d061; }
        .breadcrumb .sep { margin: 0 4px; opacity: 0.5; }
        main { padding: 40px 0 60px; }
        .article-wrapper {
            background: #fff;
            border-radius: 24px;
            box-shadow: 0 8px 40px rgba(0,0,0,0.06);
            padding: 40px 40px 60px;
            margin-bottom: 40px;
        }
        h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 12px;
            color: #0b1a2e;
            letter-spacing: -0.02em;
        }
        h1 i { color: #f0b34b; margin-right: 12px; }
        .subtitle { font-size: 1.2rem; color: #4a5a6a; margin-bottom: 24px; border-left: 4px solid #f0b34b; padding-left: 20px; }
        .meta-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 20px 40px;
            padding: 16px 0 24px;
            border-bottom: 1px solid #e8edf2;
            margin-bottom: 32px;
            font-size: 0.9rem;
            color: #5a6a7a;
        }
        .meta-bar i { margin-right: 6px; color: #f0b34b; }
        .last-updated { font-weight: 600; color: #0b1a2e; }
        h2 {
            font-size: 2rem;
            font-weight: 700;
            margin: 48px 0 16px;
            color: #0f1a2e;
            border-bottom: 2px solid #eef2f6;
            padding-bottom: 10px;
        }
        h2 i { color: #f0b34b; margin-right: 10px; }
        h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin: 32px 0 12px;
            color: #1a2a3e;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
            margin: 24px 0 8px;
            color: #2a3a4e;
        }
        p { margin-bottom: 18px; color: #2a3a4a; }
        .lead { font-size: 1.15rem; font-weight: 400; color: #1a2a3a; background: #f4f8fc; padding: 20px 24px; border-radius: 16px; border-left: 6px solid #f0b34b; margin-bottom: 28px; }
        .highlight { background: #fef8e8; padding: 2px 8px; border-radius: 6px; font-weight: 600; }
        ul, ol { margin: 0 0 20px 24px; color: #2a3a4a; }
        li { margin-bottom: 8px; }
        .feature-box {
            background: #f0f6fe;
            border-radius: 18px;
            padding: 28px 32px;
            margin: 28px 0;
            border: 1px solid #dce8f4;
        }
        .feature-box h3 { margin-top: 0; }
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            margin: 28px 0;
        }
        .card {
            background: #f9fbfd;
            border-radius: 16px;
            padding: 24px;
            border: 1px solid #e8edf2;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0,0,0,0.06); }
        .card h4 { margin-top: 0; }
        .card i { font-size: 1.8rem; color: #f0b34b; margin-bottom: 12px; display: inline-block; }
        .img-wrapper {
            margin: 32px 0;
            border-radius: 16px;
            overflow: hidden;
            background: #eef2f6;
            box-shadow: 0 4px 20px rgba(0,0,0,0.06);
        }
        .img-wrapper img { width: 100%; height: auto; object-fit: cover; }
        .img-caption { padding: 12px 20px; font-size: 0.85rem; color: #5a6a7a; background: #f4f8fc; border-top: 1px solid #e8edf2; }
        .btn {
            display: inline-block;
            padding: 12px 28px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: all 0.25s;
            background: #1a6ea0;
            color: #fff;
        }
        .btn:hover { background: #0b3d5c; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(26,110,160,0.2); }
        .btn-ghost { background: transparent; border: 2px solid #1a6ea0; color: #1a6ea0; }
        .btn-ghost:hover { background: #1a6ea0; color: #fff; }
        .interactive-grid {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 24px;
            margin: 40px 0;
        }
        .widget-box {
            background: #fff;
            border-radius: 18px;
            padding: 24px;
            border: 1px solid #e8edf2;
            box-shadow: 0 4px 16px rgba(0,0,0,0.03);
        }
        .widget-box h3 { font-size: 1.2rem; margin-top: 0; margin-bottom: 16px; display: flex; align-items: center; gap: 10px; }
        .widget-box h3 i { color: #f0b34b; }
        .widget-box input, .widget-box textarea, .widget-box select {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid #d0d8e0;
            border-radius: 10px;
            font-size: 0.95rem;
            margin-bottom: 12px;
            font-family: inherit;
            background: #f9fbfd;
            transition: border 0.2s;
        }
        .widget-box input:focus, .widget-box textarea:focus { outline: none; border-color: #1a6ea0; background: #fff; }
        .widget-box textarea { resize: vertical; min-height: 80px; }
        .widget-box .btn { width: 100%; text-align: center; margin-top: 4px; }
        .star-rating { display: flex; gap: 6px; font-size: 1.6rem; color: #d0d8e0; cursor: pointer; margin-bottom: 12px; }
        .star-rating i.active { color: #f5b342; }
        .star-rating i:hover, .star-rating i.hover { color: #f5b342; }
        .related-links {
            background: #f4f8fc;
            border-radius: 18px;
            padding: 28px 32px;
            margin: 40px 0 20px;
            border: 1px solid #dce8f4;
        }
        .related-links h3 { margin-top: 0; }
        .related-links ul { columns: 2; column-gap: 32px; list-style: none; margin-left: 0; }
        .related-links li { break-inside: avoid; margin-bottom: 8px; }
        .related-links a { display: flex; align-items: center; gap: 8px; padding: 6px 12px; border-radius: 8px; background: rgba(255,255,255,0.6); transition: all 0.2s; }
        .related-links a:hover { background: #fff; box-shadow: 0 2px 12px rgba(0,0,0,0.06); text-decoration: none; }
        .related-links a i { color: #f0b34b; font-size: 0.8rem; }
        .site-footer {
            background: #0f1a2e;
            color: rgba(255,255,255,0.7);
            padding: 48px 20px 32px;
            margin-top: 20px;
        }
        .footer-inner {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
        }
        .footer-inner h4 { color: #f5d061; margin-bottom: 16px; font-size: 1.1rem; }
        .footer-inner a { color: rgba(255,255,255,0.6); }
        .footer-inner a:hover { color: #f5d061; }
        .footer-inner ul { list-style: none; margin: 0; padding: 0; }
        .footer-inner li { margin-bottom: 8px; }
        .copyright {
            max-width: 1200px;
            margin: 32px auto 0;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.08);
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }
        .copyright a { color: rgba(255,255,255,0.5); }
        .copyright a:hover { color: #f5d061; }
        friend-link {
            display: block;
            margin-top: 12px;
            font-size: 0.9rem;
        }
        friend-link a { display: inline-block; margin-right: 16px; margin-bottom: 6px; }
        @media (max-width: 1024px) {
            .article-wrapper { padding: 32px 28px 48px; }
            h1 { font-size: 2.2rem; }
            .grid-2 { grid-template-columns: 1fr; }
            .interactive-grid { grid-template-columns: 1fr 1fr; }
            .footer-inner { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .header-inner { padding: 12px 16px; }
            .my-logo { font-size: 1.4rem; }
            .my-logo span { display: none; }
            .main-nav { display: none; width: 100%; flex-direction: column; align-items: stretch; padding: 12px 0 8px; gap: 4px; }
            .main-nav a { padding: 12px 16px; border-radius: 8px; white-space: normal; }
            .hamburger { display: block; }
            #nav-toggle:checked ~ .main-nav { display: flex; }
            .breadcrumb-wrap { padding: 6px 16px; }
            .breadcrumb { font-size: 0.75rem; }
            .article-wrapper { padding: 24px 18px 36px; border-radius: 16px; }
            h1 { font-size: 1.8rem; }
            h2 { font-size: 1.5rem; }
            h3 { font-size: 1.25rem; }
            .meta-bar { flex-direction: column; gap: 8px; }
            .interactive-grid { grid-template-columns: 1fr; }
            .related-links ul { columns: 1; }
            .footer-inner { grid-template-columns: 1fr; gap: 28px; }
            .lead { padding: 16px 18px; font-size: 1rem; }
            .feature-box { padding: 20px; }
        }
        @media (max-width: 480px) {
            .article-wrapper { padding: 16px 12px 28px; }
            h1 { font-size: 1.5rem; }
            .container { padding: 0 12px; }
            .meta-bar { font-size: 0.8rem; }
        }
        @media print {
            .site-header { position: static; }
            .hamburger, .main-nav { display: none; }
            .site-footer { break-inside: avoid; }
        }