*,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            background: #f4f7fb;
            color: #1e2a3a;
            line-height: 1.7;
            padding: 0 1rem;
        }
        a {
            color: #1a6b8a;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #0d3b4f;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        .container {
            max-width: 1120px;
            margin: 0 auto;
            background: #ffffff;
            box-shadow: 0 0 40px rgba(0, 0, 0, 0.04);
            border-radius: 24px;
            padding: 1.5rem 2rem 2.5rem;
        }
        @media (max-width: 640px) {
            body {
                padding: 0 0.5rem;
            }
            .container {
                padding: 1rem 1rem 2rem;
                border-radius: 16px;
            }
        }
        .header-top {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 0.75rem 0 1rem;
            border-bottom: 2px solid #e8edf2;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(145deg, #0f2b3b, #1b5e7a);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }
        .my-logo i {
            -webkit-text-fill-color: initial;
            color: #e6a023;
            font-size: 2rem;
        }
        .my-logo:hover {
            text-decoration: none;
            opacity: 0.85;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 1.2rem;
            font-weight: 500;
            font-size: 0.95rem;
        }
        .nav-list a {
            color: #1e3a4a;
            padding: 0.3rem 0.1rem;
            border-bottom: 2px solid transparent;
            transition: 0.2s;
        }
        .nav-list a:hover {
            border-bottom-color: #1b6b8a;
            color: #1b6b8a;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: #1e3a4a;
            cursor: pointer;
            padding: 0.2rem 0.4rem;
        }
        .nav-toggle {
            display: none;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-list {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 1rem;
                right: 1rem;
                background: #ffffff;
                border-radius: 16px;
                box-shadow: 0 12px 30px rgba(0, 0, 0, 0.10);
                padding: 1.2rem 1.5rem;
                gap: 0.8rem;
                z-index: 99;
                border: 1px solid #e2eaf0;
            }
            .nav-toggle:checked~.nav-list {
                display: flex;
            }
            .nav-wrapper {
                position: relative;
            }
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            font-size: 0.85rem;
            padding: 0.75rem 0 0.2rem;
            color: #5f727f;
        }
        .breadcrumb li+li::before {
            content: "›";
            padding: 0 0.5rem;
            color: #a0b6c7;
            font-weight: 600;
        }
        .breadcrumb a {
            color: #1a6b8a;
        }
        .breadcrumb .active {
            color: #2c4050;
            font-weight: 500;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin: 1.2rem 0 0.6rem;
            color: #0b1f2c;
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: 1.9rem;
            font-weight: 700;
            margin: 2.4rem 0 0.8rem;
            padding-bottom: 0.4rem;
            border-bottom: 3px solid #dce6ee;
            color: #12303e;
        }
        h3 {
            font-size: 1.4rem;
            font-weight: 600;
            margin: 1.8rem 0 0.6rem;
            color: #1a4257;
        }
        h4 {
            font-size: 1.15rem;
            font-weight: 600;
            margin: 1.4rem 0 0.3rem;
            color: #1f4e66;
        }
        p {
            margin: 0 0 1.2rem;
        }
        .updated {
            font-size: 0.85rem;
            color: #6a808e;
            display: block;
            margin: 0.2rem 0 1.2rem;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.2rem;
        }
        .highlight-box {
            background: #eef4f9;
            border-left: 5px solid #1b7a9e;
            padding: 1.2rem 1.8rem;
            border-radius: 12px;
            margin: 1.6rem 0;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 1.2rem;
            margin: 1.5rem 0;
        }
        .stat-card {
            background: #f2f6fb;
            padding: 1.2rem 0.8rem;
            border-radius: 14px;
            text-align: center;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
            transition: transform 0.15s;
        }
        .stat-card:hover {
            transform: translateY(-3px);
        }
        .stat-card i {
            font-size: 1.8rem;
            color: #1b7a9e;
            margin-bottom: 0.3rem;
        }
        .stat-card .num {
            font-size: 1.8rem;
            font-weight: 800;
            color: #0b2a38;
        }
        .stat-card .label {
            font-size: 0.9rem;
            color: #3d5a6b;
        }
        .search-form {
            display: flex;
            gap: 0.5rem;
            max-width: 480px;
            margin: 1.2rem 0;
            flex-wrap: wrap;
        }
        .search-form input {
            flex: 1;
            padding: 0.7rem 1rem;
            border: 2px solid #d5e0e9;
            border-radius: 40px;
            font-size: 0.95rem;
            outline: none;
            transition: 0.2s;
            min-width: 150px;
        }
        .search-form input:focus {
            border-color: #1b7a9e;
        }
        .search-form button {
            background: #1b7a9e;
            color: #fff;
            border: none;
            border-radius: 40px;
            padding: 0.7rem 1.4rem;
            font-weight: 600;
            cursor: pointer;
            transition: 0.2s;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .search-form button:hover {
            background: #0f4d63;
            transform: scale(0.97);
        }
        .feedback-section {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            margin: 2.5rem 0 1.5rem;
            padding: 1.5rem 0;
            border-top: 2px solid #e2eaef;
        }
        .comment-box,
        .rating-box {
            flex: 1 1 260px;
            background: #f8fafc;
            border-radius: 18px;
            padding: 1.5rem 1.8rem;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
        }
        .comment-box h4,
        .rating-box h4 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .comment-box textarea {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 2px solid #dae3ec;
            border-radius: 14px;
            font-family: inherit;
            font-size: 0.9rem;
            resize: vertical;
            min-height: 80px;
            transition: 0.2s;
            background: #fff;
        }
        .comment-box textarea:focus {
            border-color: #1b7a9e;
            outline: none;
        }
        .comment-box input[type="text"] {
            width: 100%;
            padding: 0.6rem 1rem;
            border: 2px solid #dae3ec;
            border-radius: 40px;
            font-size: 0.9rem;
            margin: 0.4rem 0 0.6rem;
            background: #fff;
        }
        .comment-box input[type="text"]:focus {
            border-color: #1b7a9e;
            outline: none;
        }
        .btn-submit {
            background: #1b7a9e;
            color: #fff;
            border: none;
            border-radius: 40px;
            padding: 0.6rem 1.6rem;
            font-weight: 600;
            cursor: pointer;
            transition: 0.2s;
            font-size: 0.9rem;
        }
        .btn-submit:hover {
            background: #0f4d63;
            transform: scale(0.97);
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.2rem;
            margin: 0.6rem 0 0.8rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.8rem;
            color: #cfdce6;
            cursor: pointer;
            transition: 0.15s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f5b342;
        }
        .rating-box .score-display {
            font-weight: 700;
            font-size: 1.1rem;
            color: #0b2a38;
        }
        .feature-img {
            margin: 1.8rem 0;
            border-radius: 16px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.06);
        }
        footer {
            margin-top: 3rem;
            padding-top: 1.8rem;
            border-top: 2px solid #dfe8f0;
            font-size: 0.9rem;
            color: #3b5567;
        }
        friend-link {
            display: block;
            padding: 0.8rem 0 0.2rem;
        }
        friend-link a {
            display: inline-block;
            margin: 0.2rem 1.2rem 0.2rem 0;
        }
        .copyright {
            text-align: center;
            padding: 1.2rem 0 0.2rem;
            font-size: 0.82rem;
            color: #5d7586;
        }
        @media (max-width: 480px) {
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            .header-top {
                flex-direction: column;
                align-items: stretch;
                gap: 0.4rem;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .feedback-section {
                flex-direction: column;
                gap: 1.2rem;
            }
        }
        .author-meta {
            font-size: 0.9rem;
            color: #4a6577;
            border-top: 1px dashed #d5e0ea;
            padding-top: 0.6rem;
            margin-top: 0.4rem;
        }
        .tip-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.2rem 0;
            font-size: 0.95rem;
        }
        .tip-table th {
            background: #e2ebf3;
            color: #0b2a38;
            padding: 0.6rem 0.8rem;
            text-align: left;
            font-weight: 600;
        }
        .tip-table td {
            padding: 0.5rem 0.8rem;
            border-bottom: 1px solid #dee9f0;
        }
        .tip-table tr:hover td {
            background: #f4f9ff;
        }
        .section-spacer {
            height: 0.5rem;
        }
        .inline-icon {
            margin-right: 0.3rem;
            color: #1b7a9e;
        }