*,
        *::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, 'Helvetica Neue', Arial, sans-serif;
            background: #f5f7fc;
            color: #1a1e2b;
            line-height: 1.7;
            padding: 0;
        }
        a {
            color: #2a5c8a;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #c44536;
            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(145deg, #0b1a2e, #1a2f44);
            color: #fff;
            padding: 0 0 4px 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;
            padding: 14px 20px;
            max-width: 1120px;
            margin: 0 auto;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #f0c27f, #fc5c7d);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: 0 2px 12px rgba(252, 92, 125, 0.25);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo i {
            -webkit-text-fill-color: #fc5c7d;
            font-size: 1.6rem;
        }
        .my-logo:hover {
            opacity: 0.9;
            text-decoration: none;
        }
        .my-logo span {
            font-weight: 300;
            font-size: 0.9rem;
            -webkit-text-fill-color: #b0c7e0;
            letter-spacing: 1px;
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: none;
            color: #fff;
            font-size: 1.9rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }
        .primary-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .primary-nav a {
            color: #dbe4f0;
            font-size: 0.95rem;
            padding: 8px 16px;
            border-radius: 30px;
            transition: all 0.25s;
            font-weight: 500;
            white-space: nowrap;
        }
        .primary-nav a:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            text-decoration: none;
            transform: translateY(-1px);
        }
        .primary-nav a i {
            margin-right: 6px;
            font-size: 0.85rem;
            opacity: 0.8;
        }
        .breadcrumb-wrap {
            background: #eef2f7;
            padding: 10px 20px;
            border-bottom: 1px solid #dce3ed;
            font-size: 0.9rem;
        }
        .breadcrumb-wrap .container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
        }
        .breadcrumb-wrap a {
            color: #2a5c8a;
        }
        .breadcrumb-wrap span {
            color: #5a6a7e;
        }
        .breadcrumb-wrap .sep {
            color: #9aabb8;
            margin: 0 4px;
        }
        .hero {
            padding: 40px 0 20px;
            text-align: center;
        }
        .hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            background: linear-gradient(135deg, #0b1a2e, #2a5c8a);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
            margin-bottom: 12px;
        }
        .hero .sub {
            font-size: 1.15rem;
            color: #3e5068;
            max-width: 720px;
            margin: 0 auto 20px;
        }
        .hero .meta {
            font-size: 0.9rem;
            color: #6f7e92;
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        .hero .meta i {
            margin-right: 5px;
        }
        .content-wrap {
            padding: 20px 0 40px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .main-content {
            min-width: 0;
        }
        .sidebar {
            position: sticky;
            top: 110px;
            align-self: start;
            background: #fff;
            border-radius: 16px;
            padding: 20px 18px;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.05);
            border: 1px solid #e8edf4;
        }
        .sidebar h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #0b1a2e;
            margin-bottom: 12px;
            border-bottom: 2px solid #fc5c7d;
            padding-bottom: 8px;
        }
        .sidebar ul {
            list-style: none;
        }
        .sidebar ul li {
            margin-bottom: 8px;
        }
        .sidebar ul li a {
            font-size: 0.9rem;
            color: #2a5c8a;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar ul li a::before {
            content: '›';
            color: #fc5c7d;
            font-weight: 700;
            font-size: 1.1rem;
        }
        .main-content h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #0b1a2e;
            margin: 48px 0 16px;
            padding-bottom: 8px;
            border-bottom: 3px solid #fc5c7d;
        }
        .main-content h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: #1a2f44;
            margin: 32px 0 12px;
        }
        .main-content h4 {
            font-size: 1.2rem;
            font-weight: 600;
            color: #2a5c8a;
            margin: 24px 0 10px;
        }
        .main-content p {
            margin-bottom: 16px;
            color: #1e2638;
        }
        .main-content ul,
        .main-content ol {
            margin: 12px 0 20px 24px;
        }
        .main-content li {
            margin-bottom: 8px;
        }
        .main-content .highlight {
            background: #f0f4fe;
            border-left: 4px solid #fc5c7d;
            padding: 16px 20px;
            border-radius: 0 8px 8px 0;
            margin: 20px 0;
        }
        .main-content .highlight strong {
            color: #c44536;
        }
        .main-content blockquote {
            background: #f8faff;
            border-left: 4px solid #2a5c8a;
            padding: 16px 24px;
            margin: 20px 0;
            border-radius: 0 8px 8px 0;
            font-style: italic;
            color: #2a3a50;
        }
        .featured-image {
            margin: 28px 0;
            border-radius: 14px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            background: #eef2f7;
            text-align: center;
        }
        .featured-image img {
            width: 100%;
            max-height: 460px;
            object-fit: cover;
        }
        .featured-image .caption {
            padding: 10px 16px;
            font-size: 0.85rem;
            color: #4f6078;
            background: #f8faff;
        }
        .feature-cards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 16px;
            margin: 24px 0;
        }
        .feature-card {
            background: #fff;
            border-radius: 14px;
            padding: 18px 16px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
            border: 1px solid #e5ecf5;
            transition: transform 0.2s, box-shadow 0.25s;
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.07);
        }
        .feature-card i {
            font-size: 2rem;
            color: #fc5c7d;
            margin-bottom: 8px;
        }
        .feature-card h4 {
            font-size: 1.05rem;
            margin-bottom: 4px;
            color: #0b1a2e;
        }
        .feature-card p {
            font-size: 0.9rem;
            color: #4f6078;
            margin: 0;
        }
        .search-section {
            background: #eaf0fa;
            border-radius: 16px;
            padding: 28px 24px;
            margin: 36px 0;
            text-align: center;
        }
        .search-section h3 {
            margin-top: 0;
            color: #0b1a2e;
        }
        .search-form {
            display: flex;
            max-width: 520px;
            margin: 12px auto 0;
            gap: 8px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .search-form input {
            flex: 1;
            min-width: 200px;
            padding: 14px 18px;
            border: 2px solid #d0dae8;
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            transition: border 0.25s;
            background: #fff;
        }
        .search-form input:focus {
            border-color: #fc5c7d;
        }
        .search-form button {
            padding: 14px 32px;
            background: #0b1a2e;
            color: #fff;
            border: none;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-form button:hover {
            background: #1a2f44;
            transform: scale(1.02);
        }
        .feedback-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin: 40px 0;
        }
        .feedback-card {
            background: #fff;
            border-radius: 16px;
            padding: 24px 22px;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
            border: 1px solid #e5ecf5;
        }
        .feedback-card h3 {
            margin-top: 0;
            font-size: 1.3rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 12px;
        }
        .feedback-card input,
        .feedback-card textarea {
            padding: 12px 16px;
            border: 2px solid #dce3ed;
            border-radius: 10px;
            font-size: 0.95rem;
            font-family: inherit;
            outline: none;
            transition: border 0.2s;
            background: #fafcff;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus {
            border-color: #2a5c8a;
        }
        .feedback-card textarea {
            min-height: 90px;
            resize: vertical;
        }
        .feedback-card .btn-submit {
            padding: 12px 24px;
            background: #fc5c7d;
            color: #fff;
            border: none;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.15s;
            align-self: flex-start;
        }
        .feedback-card .btn-submit:hover {
            background: #c44536;
            transform: scale(1.02);
        }
        .star-rating {
            display: flex;
            gap: 6px;
            font-size: 1.8rem;
            color: #d0dae8;
            cursor: pointer;
            direction: rtl;
            justify-content: flex-end;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            cursor: pointer;
            transition: color 0.2s, transform 0.15s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f5b342;
            transform: scale(1.05);
        }
        .star-rating label i {
            font-size: 1.8rem;
        }
        .site-footer {
            background: #0b1a2e;
            color: #c0d0e0;
            padding: 40px 20px 20px;
            margin-top: 40px;
        }
        .site-footer .container {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 32px;
        }
        .site-footer h4 {
            color: #f0f4fc;
            font-size: 1.1rem;
            margin-bottom: 12px;
        }
        .site-footer a {
            color: #9bb8d8;
        }
        .site-footer a:hover {
            color: #fc5c7d;
        }
        .site-footer .copyright {
            grid-column: 1 / -1;
            border-top: 1px solid #1f3a52;
            padding-top: 18px;
            margin-top: 12px;
            text-align: center;
            font-size: 0.9rem;
            color: #7a8fa8;
        }
        friend-link {
            display: block;
            padding: 8px 0;
        }
        friend-link a {
            display: inline-block;
            margin: 0 12px 6px 0;
            padding: 4px 12px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 20px;
            font-size: 0.9rem;
            transition: background 0.2s;
        }
        friend-link a:hover {
            background: rgba(255, 255, 255, 0.12);
            text-decoration: none;
        }
        @media (max-width: 900px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                order: 2;
                margin-top: 30px;
            }
            .feedback-section {
                grid-template-columns: 1fr;
            }
            .site-footer .container {
                grid-template-columns: 1fr 1fr;
            }
            .hero h1 {
                font-size: 2rem;
            }
        }
        @media (max-width: 680px) {
            .nav-toggle {
                display: block;
            }
            .primary-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                padding: 12px 0 6px;
                gap: 2px;
                border-top: 1px solid rgba(255, 255, 255, 0.06);
                margin-top: 6px;
            }
            .primary-nav.open {
                display: flex;
            }
            .primary-nav a {
                width: 100%;
                padding: 12px 16px;
                border-radius: 8px;
            }
            .site-footer .container {
                grid-template-columns: 1fr;
            }
            .hero h1 {
                font-size: 1.7rem;
            }
            .feature-cards {
                grid-template-columns: 1fr 1fr;
            }
            .search-form input {
                min-width: 150px;
            }
        }
        @media (max-width: 440px) {
            .feature-cards {
                grid-template-columns: 1fr;
            }
            .header-inner {
                padding: 10px 14px;
            }
            .my-logo {
                font-size: 1.4rem;
            }
        }
        .text-sm {
            font-size: 0.9rem;
            color: #5a6a7e;
        }
        .mt-2 {
            margin-top: 16px;
        }
        .mb-2 {
            margin-bottom: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }
        .tag {
            display: inline-block;
            background: #eef2f7;
            padding: 2px 14px;
            border-radius: 30px;
            font-size: 0.8rem;
            color: #2a5c8a;
            font-weight: 500;
        }