*,
        *::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, 'Helvetica Neue', sans-serif;
            background: #f5f7fa;
            color: #1e293b;
            line-height: 1.7;
            padding: 0 16px;
            max-width: 1200px;
            margin: 0 auto;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        a {
            color: #0a66c2;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #064079;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin: 0.8rem 0;
        }
        li {
            margin-bottom: 0.3rem;
        }
        h1,
        h2,
        h3,
        h4 {
            font-weight: 700;
            line-height: 1.3;
            margin-top: 1.8rem;
            margin-bottom: 0.6rem;
            color: #0f172a;
        }
        h1 {
            font-size: 2.2rem;
            border-bottom: 4px solid #2563eb;
            padding-bottom: 0.4rem;
        }
        h2 {
            font-size: 1.7rem;
            border-left: 5px solid #2563eb;
            padding-left: 0.75rem;
        }
        h3 {
            font-size: 1.35rem;
        }
        h4 {
            font-size: 1.1rem;
            font-weight: 600;
        }
        p {
            margin: 0.8rem 0;
        }
        hr {
            border: none;
            border-top: 2px solid #e2e8f0;
            margin: 2rem 0;
        }
        .container {
            background: #ffffff;
            border-radius: 20px;
            padding: 20px 24px 40px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
            margin: 16px 0 40px;
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0 12px;
            border-bottom: 2px solid #e2e8f0;
            position: relative;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            background: linear-gradient(135deg, #2563eb, #7c3aed);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
            display: inline-block;
        }
        .my-logo:hover {
            text-decoration: none;
            opacity: 0.9;
        }
        .logo-sub {
            font-size: 0.75rem;
            color: #64748b;
            display: block;
            margin-top: -4px;
            letter-spacing: 0.3px;
            -webkit-text-fill-color: #64748b;
        }
        .nav-bar {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .nav-bar a {
            padding: 6px 14px;
            border-radius: 40px;
            font-weight: 500;
            font-size: 0.9rem;
            color: #1e293b;
            background: transparent;
            transition: background 0.2s, transform 0.15s;
        }
        .nav-bar a:hover {
            background: #eef2ff;
            transform: translateY(-1px);
            text-decoration: none;
        }
        .nav-bar a i {
            margin-right: 6px;
            color: #2563eb;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: #1e293b;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: #eef2ff;
        }
        .nav-mobile {
            display: none;
            width: 100%;
            flex-direction: column;
            gap: 6px;
            padding: 12px 0 6px;
            border-top: 1px solid #e2e8f0;
            margin-top: 10px;
        }
        .nav-mobile a {
            padding: 10px 14px;
            border-radius: 10px;
            font-weight: 500;
            background: #f8fafc;
            color: #1e293b;
        }
        .nav-mobile a:hover {
            background: #eef2ff;
            text-decoration: none;
        }
        .nav-mobile.open {
            display: flex;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
            font-size: 0.85rem;
            padding: 10px 0 6px;
            color: #64748b;
            list-style: none;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .breadcrumb li+li::before {
            content: "›";
            color: #94a3b8;
            margin-right: 6px;
            font-size: 1.2rem;
        }
        .breadcrumb a {
            color: #2563eb;
        }
        .breadcrumb .active {
            color: #475569;
            font-weight: 500;
        }
        .search-area {
            display: flex;
            gap: 8px;
            max-width: 500px;
            margin: 20px 0 16px;
            flex-wrap: wrap;
        }
        .search-area input {
            flex: 1;
            min-width: 180px;
            padding: 12px 18px;
            border: 2px solid #e2e8f0;
            border-radius: 40px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.2s;
            background: #f8fafc;
        }
        .search-area input:focus {
            border-color: #2563eb;
            background: #fff;
        }
        .search-area button {
            padding: 12px 28px;
            background: #2563eb;
            color: #fff;
            border: none;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.15s;
            font-size: 0.95rem;
        }
        .search-area button:hover {
            background: #1e4bbf;
            transform: scale(1.02);
        }
        .search-area button i {
            margin-right: 6px;
        }
        .featured-img {
            margin: 24px 0 20px;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
        }
        .featured-img img {
            width: 100%;
            max-height: 420px;
            object-fit: cover;
        }
        .img-caption {
            font-size: 0.85rem;
            color: #64748b;
            text-align: center;
            padding: 8px 0 4px;
            font-style: italic;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.2rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
            background: #f8fafc;
            border-radius: 12px;
            overflow: hidden;
        }
        th,
        td {
            padding: 12px 16px;
            text-align: left;
            border-bottom: 1px solid #e2e8f0;
        }
        th {
            background: #2563eb;
            color: #fff;
            font-weight: 600;
        }
        tr:last-child td {
            border-bottom: none;
        }
        tr:hover td {
            background: #eef2ff;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin: 24px 0 16px;
        }
        .feedback-card {
            background: #f8fafc;
            border-radius: 16px;
            padding: 20px 22px;
            border: 1px solid #e2e8f0;
        }
        .feedback-card h4 {
            margin-top: 0;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .feedback-card textarea,
        .feedback-card input,
        .feedback-card select {
            width: 100%;
            padding: 10px 14px;
            border: 2px solid #e2e8f0;
            border-radius: 10px;
            font-size: 0.9rem;
            outline: none;
            transition: border 0.2s;
            background: #fff;
            margin-top: 6px;
            font-family: inherit;
        }
        .feedback-card textarea:focus,
        .feedback-card input:focus,
        .feedback-card select:focus {
            border-color: #2563eb;
        }
        .feedback-card textarea {
            resize: vertical;
            min-height: 80px;
        }
        .feedback-card .btn-submit {
            padding: 10px 24px;
            background: #2563eb;
            color: #fff;
            border: none;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            margin-top: 10px;
            font-size: 0.9rem;
        }
        .feedback-card .btn-submit:hover {
            background: #1e4bbf;
        }
        .star-rating {
            display: flex;
            gap: 6px;
            font-size: 1.6rem;
            margin: 6px 0 10px;
            cursor: pointer;
            color: #d1d5db;
            transition: color 0.15s;
        }
        .star-rating i {
            transition: color 0.15s, transform 0.1s;
        }
        .star-rating i:hover,
        .star-rating i.active {
            color: #f59e0b;
            transform: scale(1.1);
        }
        friend-link {
            display: block;
            padding: 18px 0 10px;
            border-top: 2px solid #e2e8f0;
            margin-top: 28px;
            font-size: 0.95rem;
        }
        friend-link a {
            display: inline-block;
            padding: 4px 14px;
            margin: 4px 6px 4px 0;
            background: #f1f5f9;
            border-radius: 30px;
            font-weight: 500;
            transition: background 0.2s;
        }
        friend-link a:hover {
            background: #dbeafe;
            text-decoration: none;
        }
        friend-link .fl-label {
            font-weight: 700;
            color: #334155;
            margin-right: 8px;
        }
        .site-footer {
            text-align: center;
            padding: 20px 0 28px;
            color: #64748b;
            font-size: 0.85rem;
            border-top: 2px solid #e2e8f0;
            margin-top: 20px;
        }
        .site-footer .copyright {
            font-weight: 500;
            color: #334155;
        }
        @media (max-width: 768px) {
            body {
                padding: 0 10px;
            }
            .container {
                padding: 14px 14px 30px;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.35rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            .nav-bar {
                display: none;
            }
            .hamburger {
                display: inline-block;
            }
            .feedback-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .search-area {
                flex-direction: column;
            }
            .search-area button {
                width: 100%;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .breadcrumb {
                font-size: 0.75rem;
                gap: 4px 8px;
            }
            .table-wrap table {
                font-size: 0.8rem;
            }
            th,
            td {
                padding: 8px 10px;
            }
            .star-rating {
                font-size: 1.4rem;
            }
        }
        @media (min-width: 769px) {
            .nav-mobile {
                display: none !important;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 10px 10px 24px;
            }
            h1 {
                font-size: 1.4rem;
            }
            h2 {
                font-size: 1.2rem;
                padding-left: 0.5rem;
            }
            .feedback-card {
                padding: 16px;
            }
        }
        .highlight-box {
            background: #eef2ff;
            border-left: 5px solid #2563eb;
            padding: 14px 20px;
            border-radius: 0 12px 12px 0;
            margin: 1.2rem 0;
        }
        .emoji-big {
            font-size: 1.4rem;
            margin-right: 4px;
        }
        .tag {
            display: inline-block;
            background: #dbeafe;
            color: #1e40af;
            padding: 2px 12px;
            border-radius: 30px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-right: 4px;
        }
        .last-updated {
            font-size: 0.85rem;
            color: #64748b;
            text-align: right;
            margin-top: 6px;
            font-style: italic;
        }
        .interactive-hover {
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .interactive-hover:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
        }
        .btn-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: #2563eb;
            color: #fff;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            box-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
            transition: background 0.2s, transform 0.2s;
            z-index: 99;
            border: none;
            cursor: pointer;
        }
        .btn-top:hover {
            background: #1e4bbf;
            transform: translateY(-4px);
        }
        @media (max-width: 768px) {
            .btn-top {
                bottom: 16px;
                right: 16px;
                width: 42px;
                height: 42px;
                font-size: 1.2rem;
            }
        }