*,
        *::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;
            background: #fafbfc;
            color: #1e293b;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #1d4ed8;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #0f3a9e;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin: 0.75rem 0;
        }
        li {
            margin-bottom: 0.4rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }
        .site-header {
            background: linear-gradient(135deg, #0a2a44, #0f3a5e);
            color: #fff;
            padding: 0.75rem 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: 0.75rem;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
            padding: 0.25rem 1rem 0.25rem 1.2rem;
            border-radius: 40px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            transition: background 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .my-logo i {
            color: #facc15;
            font-size: 1.3rem;
        }
        .my-logo:hover {
            background: rgba(255, 255, 255, 0.15);
            text-decoration: none;
            color: #fff;
        }
        .my-logo small {
            font-weight: 400;
            font-size: 0.65rem;
            opacity: 0.8;
            display: block;
            line-height: 1;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            flex-wrap: wrap;
        }
        .main-nav a {
            color: #e2e8f0;
            padding: 0.4rem 0.9rem;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: background 0.25s, color 0.25s;
            white-space: nowrap;
        }
        .main-nav a:hover,
        .main-nav a.active {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            text-decoration: none;
        }
        .main-nav a i {
            margin-right: 0.3rem;
            font-size: 0.8rem;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 0.25rem 0.5rem;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .breadcrumb-wrap {
            background: #f1f5f9;
            padding: 0.5rem 0;
            border-bottom: 1px solid #e2e8f0;
            font-size: 0.85rem;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0;
            margin: 0;
            gap: 0.3rem 0.6rem;
        }
        .breadcrumb li+li::before {
            content: "›";
            color: #94a3b8;
            margin-right: 0.6rem;
            font-weight: 600;
        }
        .breadcrumb a {
            color: #1d4ed8;
        }
        .breadcrumb .current {
            color: #475569;
            font-weight: 500;
        }
        .hero {
            background: linear-gradient(145deg, #0f3a5e, #1a5276);
            color: #fff;
            padding: 3rem 0 2.5rem;
            margin-bottom: 2rem;
            border-radius: 0 0 40px 40px;
        }
        .hero h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 0.75rem;
        }
        .hero h1 i {
            color: #facc15;
        }
        .hero p {
            font-size: 1.1rem;
            opacity: 0.9;
            max-width: 720px;
        }
        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            margin-top: 1.2rem;
            font-size: 0.9rem;
            opacity: 0.85;
        }
        .hero-meta span i {
            margin-right: 0.4rem;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            margin-bottom: 3rem;
        }
        @media (max-width: 900px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .main-content h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: #0a2a44;
            border-bottom: 3px solid #facc15;
            padding-bottom: 0.4rem;
            margin: 2.5rem 0 1rem;
        }
        .main-content h2 i {
            color: #facc15;
            margin-right: 0.5rem;
        }
        .main-content h3 {
            font-size: 1.35rem;
            font-weight: 600;
            color: #1e3a5f;
            margin: 1.8rem 0 0.6rem;
            padding-left: 0.4rem;
            border-left: 4px solid #facc15;
            padding-left: 0.8rem;
        }
        .main-content h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: #2c3e50;
            margin: 1.2rem 0 0.4rem;
        }
        .main-content p {
            margin-bottom: 1rem;
            text-align: justify;
        }
        .main-content .highlight {
            background: #fef9e7;
            padding: 0.2rem 0.6rem;
            border-radius: 6px;
            font-weight: 600;
        }
        .feature-img {
            margin: 2rem 0;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
        }
        .feature-img img {
            width: 100%;
            height: auto;
            aspect-ratio: 16/9;
            object-fit: cover;
        }
        .feature-img figcaption {
            background: #f8fafc;
            padding: 0.6rem 1rem;
            font-size: 0.85rem;
            color: #475569;
            border-top: 1px solid #e2e8f0;
        }
        .sidebar {
            background: #ffffff;
            border-radius: 24px;
            padding: 1.5rem 1.2rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
            border: 1px solid #eef2f6;
            height: fit-content;
            position: sticky;
            top: 90px;
        }
        .sidebar h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: #0a2a44;
            margin-bottom: 1rem;
            border-bottom: 2px solid #facc15;
            padding-bottom: 0.4rem;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar ul li {
            padding: 0.5rem 0;
            border-bottom: 1px solid #f1f5f9;
        }
        .sidebar ul li a {
            color: #1d4ed8;
            font-weight: 500;
            font-size: 0.9rem;
        }
        .sidebar ul li a:hover {
            color: #0f3a9e;
        }
        .search-section {
            background: #fff;
            border-radius: 20px;
            padding: 1.5rem;
            margin: 2rem 0;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
            border: 1px solid #eef2f6;
        }
        .search-section h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
        }
        .search-form {
            display: flex;
            gap: 0.75rem;
            flex-wrap: wrap;
        }
        .search-form input[type="text"] {
            flex: 1;
            min-width: 200px;
            padding: 0.7rem 1.2rem;
            border: 2px solid #e2e8f0;
            border-radius: 40px;
            font-size: 1rem;
            transition: border 0.3s;
            outline: none;
        }
        .search-form input[type="text"]:focus {
            border-color: #facc15;
        }
        .search-form button {
            background: #0a2a44;
            color: #fff;
            border: none;
            padding: 0.7rem 2rem;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s, transform 0.15s;
            font-size: 1rem;
        }
        .search-form button:hover {
            background: #1a5276;
            transform: scale(1.02);
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        @media (max-width: 640px) {
            .feedback-grid {
                grid-template-columns: 1fr;
            }
        }
        .card-feedback {
            background: #fff;
            border-radius: 20px;
            padding: 1.5rem;
            border: 1px solid #eef2f6;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.03);
        }
        .card-feedback h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .card-feedback h3 i {
            color: #facc15;
        }
        .card-feedback form {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .card-feedback textarea {
            resize: vertical;
            min-height: 90px;
            padding: 0.7rem 1rem;
            border: 2px solid #e2e8f0;
            border-radius: 14px;
            font-family: inherit;
            font-size: 0.95rem;
            transition: border 0.3s;
            outline: none;
        }
        .card-feedback textarea:focus {
            border-color: #facc15;
        }
        .card-feedback input[type="text"],
        .card-feedback input[type="number"] {
            padding: 0.6rem 1rem;
            border: 2px solid #e2e8f0;
            border-radius: 40px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.3s;
        }
        .card-feedback input:focus {
            border-color: #facc15;
        }
        .card-feedback .star-group {
            display: flex;
            gap: 0.3rem;
            font-size: 1.5rem;
            color: #facc15;
            cursor: pointer;
        }
        .card-feedback .star-group i {
            transition: transform 0.15s;
        }
        .card-feedback .star-group i:hover {
            transform: scale(1.2);
        }
        .card-feedback button {
            background: #0a2a44;
            color: #fff;
            border: none;
            padding: 0.65rem 1.8rem;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s;
            font-size: 0.95rem;
            align-self: flex-start;
        }
        .card-feedback button:hover {
            background: #1a5276;
        }
        .rating-row {
            display: flex;
            align-items: center;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .site-footer {
            background: #0a2a44;
            color: #cbd5e1;
            padding: 2.5rem 0 1.5rem;
            margin-top: 3rem;
            border-radius: 40px 40px 0 0;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
        }
        @media (max-width: 700px) {
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
        }
        .footer-inner h4 {
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 0.8rem;
            border-bottom: 2px solid #facc15;
            padding-bottom: 0.3rem;
            display: inline-block;
        }
        .footer-inner a {
            color: #93c5fd;
        }
        .footer-inner a:hover {
            color: #fff;
        }
        .friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.05);
            padding: 0.5rem 1rem;
            border-radius: 12px;
            margin: 0.3rem 0;
            transition: background 0.2s;
        }
        .friend-link:hover {
            background: rgba(255, 255, 255, 0.1);
            text-decoration: none;
        }
        .copyright {
            text-align: center;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 1.2rem;
            margin-top: 2rem;
            font-size: 0.85rem;
            color: #94a3b8;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                background: rgba(10, 42, 68, 0.97);
                padding: 0.75rem 0.5rem;
                border-radius: 16px;
                margin-top: 0.5rem;
                gap: 0.15rem;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 0.6rem 1rem;
                border-radius: 10px;
                width: 100%;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero p {
                font-size: 0.95rem;
            }
            .breadcrumb-wrap {
                font-size: 0.75rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                width: 100%;
            }
            .my-logo {
                font-size: 1.2rem;
                padding: 0.2rem 0.8rem;
            }
        }
        @media (max-width: 480px) {
            .hero {
                padding: 1.5rem 0 1.5rem;
            }
            .hero h1 {
                font-size: 1.3rem;
            }
            .main-content h2 {
                font-size: 1.4rem;
            }
            .main-content h3 {
                font-size: 1.1rem;
            }
            .container {
                padding: 0 1rem;
            }
        }
        .badge {
            display: inline-block;
            background: #facc15;
            color: #0a2a44;
            font-weight: 700;
            font-size: 0.7rem;
            padding: 0.15rem 0.7rem;
            border-radius: 30px;
            letter-spacing: 0.3px;
        }
        .mt-1 {
            margin-top: 1rem;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }
        .text-sm {
            font-size: 0.9rem;
        }
        .divider {
            height: 1px;
            background: #e2e8f0;
            margin: 2rem 0;
        }
        .scroll-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            background: #0a2a44;
            color: #fff;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s, transform 0.3s;
            z-index: 999;
            border: none;
            cursor: pointer;
        }
        .scroll-top.visible {
            opacity: 1;
            pointer-events: auto;
        }
        .scroll-top:hover {
            transform: scale(1.08);
        }