* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.7;
            color: #1e293b;
            background: #f8fafc;
            font-size: 16px;
        }
        a {
            color: #0f3b5e;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #1e6f9f;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        .container {
            max-width: 1120px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #0b2a3b 0%, #1a4a5f 100%);
            color: #fff;
            padding: 16px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #fff;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.08);
            padding: 4px 16px 4px 12px;
            border-radius: 40px;
            transition: background 0.25s;
        }
        .my-logo:hover {
            background: rgba(255, 255, 255, 0.18);
            text-decoration: none;
            color: #fff;
        }
        .my-logo i {
            font-size: 1.6rem;
            color: #facc15;
        }
        .my-logo span {
            font-weight: 300;
            color: #b9d9e8;
            font-size: 1rem;
            margin-left: 2px;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid rgba(255, 255, 255, 0.5);
            color: #fff;
            font-size: 1.8rem;
            padding: 6px 14px;
            border-radius: 8px;
            cursor: pointer;
            transition: border 0.2s;
        }
        .nav-toggle:hover {
            border-color: #fff;
        }
        .main-nav {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            align-items: center;
        }
        .main-nav a {
            color: #e2edf3;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 30px;
            transition: background 0.2s, color 0.2s;
            font-size: 0.95rem;
            white-space: nowrap;
        }
        .main-nav a:hover {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            text-decoration: none;
        }
        .main-nav a.active {
            background: #facc15;
            color: #0b2a3b;
        }
        .breadcrumb-wrap {
            background: #e9f0f5;
            padding: 12px 0;
            border-bottom: 1px solid #dce5ec;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            font-size: 0.9rem;
            gap: 6px 12px;
            color: #4a6478;
        }
        .breadcrumb li+li:before {
            content: "›";
            margin-right: 12px;
            color: #8aa3b5;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #1a5a7a;
        }
        .breadcrumb a:hover {
            color: #0b2a3b;
        }
        .breadcrumb .current {
            color: #1e293b;
            font-weight: 600;
        }
        .main-content {
            padding: 40px 0 60px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 48px;
        }
        .article-body h1 {
            font-size: 2.6rem;
            line-height: 1.2;
            color: #0b2a3b;
            margin-bottom: 12px;
            font-weight: 800;
            letter-spacing: -1px;
        }
        .article-body .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 32px;
            color: #4a6478;
            font-size: 0.95rem;
            margin-bottom: 24px;
            padding-bottom: 20px;
            border-bottom: 1px solid #dce5ec;
        }
        .article-body .meta i {
            margin-right: 6px;
            color: #1a5a7a;
        }
        .article-body .last-updated {
            background: #e9f0f5;
            padding: 4px 14px;
            border-radius: 30px;
            font-weight: 500;
            font-size: 0.85rem;
        }
        .article-body h2 {
            font-size: 2rem;
            color: #0f3b5e;
            margin-top: 48px;
            margin-bottom: 16px;
            font-weight: 700;
            border-left: 6px solid #facc15;
            padding-left: 18px;
        }
        .article-body h3 {
            font-size: 1.5rem;
            color: #1a4a5f;
            margin-top: 36px;
            margin-bottom: 12px;
            font-weight: 600;
        }
        .article-body h4 {
            font-size: 1.2rem;
            color: #2d5f7a;
            margin-top: 24px;
            margin-bottom: 8px;
            font-weight: 600;
        }
        .article-body p {
            margin-bottom: 18px;
            color: #1e293b;
            font-size: 1.05rem;
        }
        .article-body ul,
        .article-body ol {
            margin: 12px 0 20px 24px;
            color: #1e293b;
            font-size: 1.05rem;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .article-body strong {
            color: #0b2a3b;
            font-weight: 700;
        }
        .article-body .highlight-box {
            background: #edf4f9;
            border-left: 6px solid #1a5a7a;
            padding: 24px 28px;
            border-radius: 12px;
            margin: 28px 0;
            font-style: normal;
        }
        .article-body .highlight-box strong {
            color: #0f3b5e;
        }
        .article-body .feature-img-wrap {
            margin: 32px 0;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            background: #e9f0f5;
            padding: 8px;
        }
        .article-body .feature-img-wrap img {
            width: 100%;
            border-radius: 10px;
        }
        .article-body .feature-img-wrap figcaption {
            text-align: center;
            font-size: 0.9rem;
            color: #4a6478;
            padding: 10px 0 4px;
            font-style: italic;
        }
        .article-body .link-list {
            background: #f1f6fa;
            border-radius: 14px;
            padding: 20px 28px;
            margin: 24px 0;
        }
        .article-body .link-list li {
            margin-bottom: 8px;
        }
        .article-body .link-list a {
            font-weight: 500;
        }
        .sidebar {
            position: sticky;
            top: 120px;
            align-self: start;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 16px;
            padding: 24px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
            margin-bottom: 28px;
            border: 1px solid #e2edf3;
        }
        .sidebar-card h3 {
            font-size: 1.2rem;
            color: #0b2a3b;
            margin-bottom: 16px;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i {
            color: #facc15;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
        }
        .sidebar-card ul li {
            padding: 8px 0;
            border-bottom: 1px solid #eef3f7;
        }
        .sidebar-card ul li:last-child {
            border-bottom: none;
        }
        .sidebar-card ul li a {
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card ul li a i {
            color: #1a5a7a;
            font-size: 0.8rem;
        }
        .search-form {
            display: flex;
            gap: 8px;
            margin-top: 8px;
        }
        .search-form input {
            flex: 1;
            padding: 12px 16px;
            border: 2px solid #dce5ec;
            border-radius: 40px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.25s;
        }
        .search-form input:focus {
            border-color: #1a5a7a;
        }
        .search-form button {
            background: #0f3b5e;
            color: #fff;
            border: none;
            padding: 0 22px;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            font-size: 1rem;
        }
        .search-form button:hover {
            background: #1a5a7a;
        }
        .feedback-section {
            margin-top: 60px;
            padding-top: 40px;
            border-top: 2px solid #dce5ec;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }
        .feedback-card {
            background: #fff;
            border-radius: 20px;
            padding: 28px 32px;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
            border: 1px solid #e2edf3;
        }
        .feedback-card h3 {
            font-size: 1.3rem;
            color: #0b2a3b;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .feedback-card h3 i {
            color: #facc15;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .feedback-card input,
        .feedback-card textarea {
            padding: 12px 16px;
            border: 2px solid #dce5ec;
            border-radius: 12px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.25s;
            font-family: inherit;
            background: #fafcfe;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus {
            border-color: #1a5a7a;
        }
        .feedback-card textarea {
            min-height: 100px;
            resize: vertical;
        }
        .feedback-card .star-wrap {
            display: flex;
            gap: 6px;
            font-size: 1.6rem;
            color: #dce5ec;
            cursor: pointer;
            direction: rtl;
        }
        .feedback-card .star-wrap input {
            display: none;
        }
        .feedback-card .star-wrap label {
            cursor: pointer;
            transition: color 0.15s;
            color: #dce5ec;
        }
        .feedback-card .star-wrap label:hover,
        .feedback-card .star-wrap label:hover~label,
        .feedback-card .star-wrap input:checked~label {
            color: #facc15;
        }
        .feedback-card .btn-submit {
            background: #0f3b5e;
            color: #fff;
            border: none;
            padding: 14px 24px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s;
            align-self: flex-start;
        }
        .feedback-card .btn-submit:hover {
            background: #1a5a7a;
        }
        .site-footer {
            background: #0b2a3b;
            color: #c9dde8;
            padding: 48px 0 24px;
            margin-top: 60px;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col p,
        .footer-col li {
            font-size: 0.95rem;
            line-height: 1.8;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
        }
        .footer-col ul li {
            padding: 4px 0;
        }
        .footer-col ul li a {
            color: #b9d9e8;
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        friend-link {
            display: block;
            margin-top: 8px;
        }
        friend-link a {
            color: #facc15;
            font-weight: 500;
        }
        friend-link a:hover {
            color: #fff;
        }
        .copyright {
            text-align: center;
            padding-top: 32px;
            margin-top: 32px;
            border-top: 1px solid #1a4a5f;
            font-size: 0.9rem;
            color: #8aa3b5;
        }
        .copyright strong {
            color: #c9dde8;
        }
        @media (max-width: 1024px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .sidebar .sidebar-card {
                margin-bottom: 0;
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                padding-top: 16px;
                gap: 4px;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 12px 16px;
                border-radius: 8px;
                width: 100%;
            }
            .header-inner {
                align-items: center;
            }
            .my-logo {
                font-size: 1.4rem;
                padding: 4px 12px 4px 10px;
            }
            .my-logo span {
                font-size: 0.85rem;
            }
            .article-body h1 {
                font-size: 1.9rem;
            }
            .article-body h2 {
                font-size: 1.6rem;
            }
            .article-body h3 {
                font-size: 1.3rem;
            }
            .feedback-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                grid-template-columns: 1fr;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .breadcrumb-wrap {
                font-size: 0.85rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 14px;
            }
            .article-body h1 {
                font-size: 1.6rem;
            }
            .article-body {
                font-size: 0.95rem;
            }
            .feedback-card {
                padding: 20px;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                padding: 12px;
            }
        }