*,
        *::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: #f8f7f4;
            color: #2c2c2c;
            line-height: 1.7;
            padding: 0 1rem;
            max-width: 1280px;
            margin: 0 auto;
        }
        h1,
        h2,
        h3,
        h4 {
            font-weight: 700;
            line-height: 1.25;
            color: #1a2a3a;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
        }
        h1 {
            font-size: 2.4rem;
            border-left: 6px solid #3a7ca5;
            padding-left: 1.2rem;
            margin-top: 1.2rem;
        }
        h2 {
            font-size: 1.8rem;
            border-bottom: 2px solid #dce3ed;
            padding-bottom: 0.4rem;
        }
        h3 {
            font-size: 1.4rem;
        }
        h4 {
            font-size: 1.15rem;
            font-weight: 600;
        }
        p {
            margin-bottom: 1.2rem;
        }
        a {
            color: #3a7ca5;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #1f4b6e;
            text-decoration: underline;
        }
        strong {
            color: #1a2a3a;
        }
        em {
            font-style: italic;
            color: #4a5a6a;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 12px;
            display: block;
            margin: 1.8rem auto;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
        }
        ul,
        ol {
            padding-left: 1.8rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        blockquote {
            border-left: 4px solid #3a7ca5;
            background: #edf2f7;
            padding: 1rem 1.6rem;
            margin: 1.8rem 0;
            border-radius: 0 8px 8px 0;
            font-style: italic;
            color: #2d3e50;
        }
        header {
            padding: 1.2rem 0 0.6rem;
            border-bottom: 1px solid #e0e4ea;
            background: #ffffff;
            border-radius: 0 0 16px 16px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.03);
            position: relative;
            z-index: 100;
        }
        .header-inner {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 0.8rem;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #1a2a3a;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #2a5f7a, #3a7ca5);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .my-logo small {
            font-size: 0.8rem;
            font-weight: 400;
            -webkit-text-fill-color: #5a6a7a;
            color: #5a6a7a;
            display: block;
            letter-spacing: 0.2px;
        }
        .my-logo a {
            color: inherit;
            text-decoration: none;
        }
        .my-logo a:hover {
            text-decoration: none;
        }
        nav {
            display: flex;
            align-items: center;
            gap: 1.2rem;
        }
        .nav-links {
            display: flex;
            gap: 1.2rem;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .nav-links li a {
            font-weight: 500;
            padding: 0.4rem 0.2rem;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s;
        }
        .nav-links li a:hover {
            border-bottom-color: #3a7ca5;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            background: none;
            border: none;
            color: #1a2a3a;
            padding: 0.2rem 0.6rem;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: #edf2f7;
        }
        .breadcrumb {
            padding: 0.6rem 0 0.2rem;
            font-size: 0.9rem;
            color: #5a6a7a;
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem;
            align-items: center;
        }
        .breadcrumb a {
            color: #3a7ca5;
        }
        .breadcrumb span {
            color: #8a9aaa;
        }
        .breadcrumb .current {
            color: #1a2a3a;
            font-weight: 500;
        }
        main {
            padding: 2rem 0 3rem;
        }
        .search-wrap {
            background: #ffffff;
            border-radius: 12px;
            padding: 1.2rem 1.6rem;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
            margin: 1.2rem 0 2rem;
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            align-items: center;
        }
        .search-wrap label {
            font-weight: 600;
            color: #1a2a3a;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .search-wrap form {
            display: flex;
            flex: 1;
            gap: 0.6rem;
            min-width: 200px;
        }
        .search-wrap input[type="text"] {
            flex: 1;
            padding: 0.6rem 1rem;
            border: 2px solid #dce3ed;
            border-radius: 8px;
            font-size: 1rem;
            transition: border-color 0.2s;
            min-width: 0;
        }
        .search-wrap input[type="text"]:focus {
            outline: none;
            border-color: #3a7ca5;
        }
        .search-wrap button {
            background: #3a7ca5;
            color: #fff;
            border: none;
            padding: 0.6rem 1.4rem;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            font-size: 1rem;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .search-wrap button:hover {
            background: #1f4b6e;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.8rem;
            margin: 2.4rem 0;
        }
        @media (max-width:700px) {
            .feedback-grid {
                grid-template-columns: 1fr;
            }
        }
        .feedback-card {
            background: #ffffff;
            border-radius: 14px;
            padding: 1.6rem 2rem;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.05);
        }
        .feedback-card h3 {
            margin-top: 0;
            font-size: 1.3rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
            margin-top: 0.6rem;
        }
        .feedback-card input,
        .feedback-card textarea,
        .feedback-card select {
            padding: 0.6rem 1rem;
            border: 2px solid #dce3ed;
            border-radius: 8px;
            font-size: 0.95rem;
            font-family: inherit;
            transition: border-color 0.2s;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            outline: none;
            border-color: #3a7ca5;
        }
        .feedback-card textarea {
            min-height: 90px;
            resize: vertical;
        }
        .feedback-card button {
            background: #2a5f7a;
            color: #fff;
            border: none;
            padding: 0.7rem 1.6rem;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            font-size: 1rem;
            align-self: flex-start;
        }
        .feedback-card button:hover {
            background: #1a3f52;
        }
        .star-select {
            display: flex;
            gap: 0.4rem;
            font-size: 1.6rem;
            color: #e0c040;
            cursor: pointer;
        }
        .star-select i {
            transition: transform 0.15s;
        }
        .star-select i:hover {
            transform: scale(1.2);
        }
        footer {
            border-top: 1px solid #e0e4ea;
            padding: 2rem 0 1.5rem;
            margin-top: 2rem;
            background: #ffffff;
            border-radius: 16px 16px 0 0;
            box-shadow: 0 -2px 12px rgba(0, 0, 0, 0.03);
        }
        .footer-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 1.5rem;
        }
        .footer-col {
            flex: 1 1 200px;
        }
        .footer-col h4 {
            margin-top: 0;
            font-size: 1.1rem;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 0.4rem;
        }
        .footer-col ul li a {
            color: #3a7ca5;
        }
        friend-link {
            display: block;
            padding: 1rem 0 0.4rem;
            font-size: 0.95rem;
            color: #3a5a6a;
        }
        friend-link a {
            font-weight: 500;
        }
        .copyright {
            text-align: center;
            padding-top: 1.2rem;
            font-size: 0.9rem;
            color: #6a7a8a;
            border-top: 1px solid #e8ecf0;
            margin-top: 1.2rem;
        }
        @media (max-width:780px) {
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #ffffff;
                padding: 1rem 1.2rem;
                border-radius: 12px;
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                z-index: 99;
                margin-top: 0.4rem;
            }
            .nav-links.open {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .header-inner {
                flex-wrap: wrap;
            }
            h1 {
                font-size: 1.8rem;
                padding-left: 1rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.2rem;
            }
            .search-wrap form {
                flex-wrap: wrap;
            }
            .search-wrap input[type="text"] {
                min-width: 120px;
            }
        }
        @media (max-width:480px) {
            body {
                padding: 0 0.6rem;
            }
            .feedback-card {
                padding: 1rem 1.2rem;
            }
            .star-select {
                font-size: 1.3rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
        }
        .updated {
            font-size: 0.9rem;
            color: #6a7a8a;
            background: #edf2f7;
            display: inline-block;
            padding: 0.2rem 1rem;
            border-radius: 20px;
            margin: 0.4rem 0 1.2rem;
        }
        .feature-badge {
            display: inline-block;
            background: #3a7ca5;
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.15rem 0.8rem;
            border-radius: 20px;
            letter-spacing: 0.3px;
        }
        .data-box {
            background: #edf2f7;
            border-radius: 12px;
            padding: 1.4rem 1.8rem;
            margin: 1.8rem 0;
            border-left: 4px solid #3a7ca5;
        }
        .data-box h4 {
            margin-top: 0;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.8rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
            background: #fff;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 1px 8px rgba(0, 0, 0, 0.04);
        }
        th,
        td {
            padding: 0.7rem 1rem;
            text-align: left;
            border-bottom: 1px solid #e8ecf0;
        }
        th {
            background: #2a5f7a;
            color: #fff;
            font-weight: 600;
        }
        tr:last-child td {
            border-bottom: none;
        }
        tr:hover td {
            background: #f5f8fc;
        }
        *[id] {
            scroll-margin-top: 90px;
        }