*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            background: #f6f9fc;
            color: #1a2a3a;
            line-height: 1.7;
            min-height: 100vh;
        }
        a {
            color: #0f6b8a;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover,
        a:focus-visible {
            color: #c4450c;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin: 1rem 0;
        }
        li {
            margin-bottom: 0.4rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            color: #0b2a3b;
            font-weight: 700;
        }
        h1 {
            font-size: 2.4rem;
            margin: 0 0 1.2rem;
        }
        h2 {
            font-size: 1.8rem;
            margin: 2.2rem 0 1rem;
            border-bottom: 3px solid #e67e22;
            padding-bottom: 0.4rem;
            display: inline-block;
        }
        h3 {
            font-size: 1.35rem;
            margin: 1.8rem 0 0.7rem;
            color: #1a4a5e;
        }
        h4 {
            font-size: 1.1rem;
            margin: 1.4rem 0 0.5rem;
            color: #2c5f73;
            font-weight: 600;
        }
        p {
            margin: 0 0 1.2rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .page-wrapper {
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        .site-header {
            background: linear-gradient(145deg, #0b2a3b 0%, #1a4a5e 100%);
            color: #fff;
            padding: 0.8rem 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;
            gap: 0.8rem 1.5rem;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #f7d674;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            transition: transform 0.2s;
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
            color: #f7d674;
        }
        .my-logo i {
            font-size: 1.7rem;
            color: #e67e22;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid rgba(255, 255, 255, 0.5);
            color: #fff;
            font-size: 1.6rem;
            padding: 0.3rem 0.8rem;
            border-radius: 9px;
            cursor: pointer;
            transition: all 0.25s;
        }
        .nav-toggle:hover,
        .nav-toggle:focus-visible {
            border-color: #f7d674;
            color: #f7d674;
        }
        .primary-nav {
            display: flex;
            gap: 1.2rem 2rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .primary-nav a {
            color: #e8f0f5;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.3rem 0;
            border-bottom: 2px solid transparent;
            transition: all 0.25s;
            position: relative;
        }
        .primary-nav a:hover,
        .primary-nav a:focus-visible {
            color: #f7d674;
            text-decoration: none;
            border-bottom-color: #e67e22;
        }
        .primary-nav a.active {
            color: #f7d674;
            border-bottom-color: #e67e22;
        }
        .breadcrumb-wrap {
            background: #eaf0f5;
            padding: 0.6rem 0;
            border-bottom: 1px solid #d4e0e8;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.3rem 0.6rem;
            font-size: 0.9rem;
            color: #3e5a6b;
        }
        .breadcrumb a {
            color: #0f6b8a;
        }
        .breadcrumb span.sep {
            color: #8aa3b3;
            font-weight: 300;
        }
        .breadcrumb .current {
            color: #1a2a3a;
            font-weight: 600;
        }
        .main-content {
            flex: 1;
            padding: 2rem 0 3rem;
        }
        .grid-layout {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 2.5rem 3rem;
            align-items: start;
        }
        .article-body {
            background: #fff;
            border-radius: 20px;
            padding: 2rem 2.2rem;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.05);
        }
        .sidebar {
            background: #fff;
            border-radius: 20px;
            padding: 1.8rem 1.6rem;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.05);
            position: sticky;
            top: 100px;
        }
        .sidebar h3 {
            font-size: 1.2rem;
            margin-top: 0;
            border-bottom: 2px solid #e67e22;
            padding-bottom: 0.4rem;
            display: inline-block;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
            margin: 1rem 0 0;
        }
        .sidebar li {
            padding: 0.5rem 0;
            border-bottom: 1px solid #eef3f7;
        }
        .sidebar li:last-child {
            border-bottom: none;
        }
        .sidebar a {
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .sidebar a i {
            color: #e67e22;
            width: 1.1rem;
            text-align: center;
        }
        .last-updated {
            display: inline-block;
            background: #eaf0f5;
            padding: 0.3rem 1rem;
            border-radius: 30px;
            font-size: 0.85rem;
            color: #2c5f73;
            margin-bottom: 1.5rem;
        }
        .last-updated i {
            margin-right: 0.4rem;
        }
        .feature-img {
            margin: 1.8rem 0 2.2rem;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 6px 30px rgba(0, 0, 0, 0.08);
        }
        .feature-img figcaption {
            padding: 0.8rem 1.2rem;
            background: #f0f5fa;
            font-size: 0.9rem;
            color: #2c5f73;
            font-style: italic;
        }
        .highlight-box {
            background: #f8f3e9;
            border-left: 5px solid #e67e22;
            padding: 1.2rem 1.8rem;
            border-radius: 0 14px 14px 0;
            margin: 1.8rem 0;
        }
        .highlight-box p:last-child {
            margin-bottom: 0;
        }
        .strategy-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 1rem;
            margin: 1.5rem 0;
            padding: 0;
            list-style: none;
        }
        .strategy-list li {
            background: #f6f9fc;
            padding: 1rem 1.2rem;
            border-radius: 12px;
            border-left: 4px solid #0f6b8a;
            font-weight: 500;
        }
        .strategy-list li i {
            color: #e67e22;
            margin-right: 0.6rem;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: #0f6b8a;
            color: #fff;
            border: none;
            padding: 0.7rem 1.5rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
        }
        .btn:hover {
            background: #c4450c;
            color: #fff;
            text-decoration: none;
            transform: translateY(-2px);
        }
        .btn:active {
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            color: #0f6b8a;
            border: 2px solid #0f6b8a;
        }
        .btn-outline:hover {
            background: #0f6b8a;
            color: #fff;
        }
        .form-card {
            background: #f6f9fc;
            border-radius: 16px;
            padding: 1.8rem 2rem;
            margin: 2rem 0;
            border: 1px solid #e0eaf0;
        }
        .form-card h3 {
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 0.3rem;
            color: #1a4a5e;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 2px solid #d4e0e8;
            border-radius: 10px;
            font-size: 1rem;
            font-family: inherit;
            background: #fff;
            transition: border-color 0.25s;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: #0f6b8a;
            box-shadow: 0 0 0 3px rgba(15, 107, 138, 0.12);
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1rem;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            gap: 0.25rem;
            justify-content: flex-end;
            font-size: 1.8rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            cursor: pointer;
            color: #cbd8e4;
            transition: color 0.2s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #e67e22;
        }
        .comment-item {
            padding: 1rem 0;
            border-bottom: 1px solid #e8eef4;
        }
        .comment-item:last-child {
            border-bottom: none;
        }
        .comment-author {
            font-weight: 700;
            color: #0b2a3b;
        }
        .comment-meta {
            font-size: 0.85rem;
            color: #6b8a9e;
        }
        .comment-body {
            margin-top: 0.4rem;
        }
        friend-link {
            display: block;
            margin: 2rem 0 1rem;
        }
        friend-link ul {
            list-style: none;
            padding: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem 1.8rem;
        }
        friend-link li a {
            background: #eaf0f5;
            padding: 0.3rem 1.2rem;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: background 0.2s;
        }
        friend-link li a:hover {
            background: #d4e0e8;
            text-decoration: none;
        }
        .site-footer {
            background: #0b2a3b;
            color: #cbd8e4;
            padding: 2.5rem 0 1.8rem;
            margin-top: 2rem;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
        }
        .footer-inner h4 {
            color: #f7d674;
            margin-top: 0;
            font-size: 1.1rem;
        }
        .footer-inner a {
            color: #b0c8d8;
        }
        .footer-inner a:hover {
            color: #f7d674;
        }
        .copyright {
            grid-column: 1 / -1;
            border-top: 1px solid #1f4a5e;
            padding-top: 1.5rem;
            margin-top: 1.5rem;
            text-align: center;
            font-size: 0.9rem;
            color: #8aa3b3;
        }
        .copyright strong {
            color: #e8f0f5;
        }
        @media (max-width: 992px) {
            .grid-layout {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                margin-top: 2rem;
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .primary-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background: rgba(11, 42, 59, 0.98);
                padding: 1.2rem 1.5rem;
                border-radius: 16px;
                margin-top: 0.5rem;
                gap: 0.6rem;
            }
            .primary-nav.open {
                display: flex;
            }
            .primary-nav a {
                font-size: 1.05rem;
                padding: 0.5rem 0;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            .article-body {
                padding: 1.2rem 1rem;
            }
            .sidebar {
                padding: 1.2rem 1rem;
            }
            .form-row {
                grid-template-columns: 1fr;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .strategy-list {
                grid-template-columns: 1fr;
            }
            .header-inner {
                gap: 0.5rem;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .breadcrumb {
                font-size: 0.8rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 12px;
            }
            h1 {
                font-size: 1.5rem;
            }
            .btn {
                padding: 0.6rem 1.2rem;
                font-size: 0.9rem;
            }
            .form-card {
                padding: 1.2rem 1rem;
            }
            .star-rating {
                font-size: 1.5rem;
            }
        }
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                transition-duration: 0.01ms !important;
                animation-duration: 0.01ms !important;
            }
        }
        .skip-link {
            position: absolute;
            top: -100%;
            left: 1rem;
            background: #e67e22;
            color: #fff;
            padding: 0.5rem 1.2rem;
            border-radius: 0 0 10px 10px;
            z-index: 9999;
            font-weight: 600;
        }
        .skip-link:focus {
            top: 0;
        }