*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --secondary: #f8b739;
            --accent: #e74c3c;
            --bg: #f4f7fb;
            --card-bg: #ffffff;
            --text: #1e2a3a;
            --text-light: #4a5a6a;
            --border: #dce3ed;
            --radius: 12px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            padding: 0 16px;
            max-width: 1200px;
            margin: 0 auto;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: var(--secondary);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        header {
            background: var(--card-bg);
            border-radius: 0 0 var(--radius) var(--radius);
            box-shadow: var(--shadow);
            padding: 16px 24px;
            margin-bottom: 24px;
            position: relative;
            z-index: 100;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo i {
            color: var(--secondary);
            font-size: 2rem;
        }
        .my-logo:hover {
            text-decoration: none;
            color: var(--primary-light);
        }
        .my-logo small {
            font-size: 0.7rem;
            font-weight: 400;
            color: var(--text-light);
            display: block;
            line-height: 1;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--primary);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: var(--bg);
        }
        nav.main-nav {
            display: flex;
            align-items: center;
            gap: 8px 20px;
            flex-wrap: wrap;
        }
        nav.main-nav a {
            font-weight: 600;
            color: var(--text);
            padding: 6px 12px;
            border-radius: 6px;
            transition: background 0.2s, color 0.2s;
            font-size: 0.95rem;
        }
        nav.main-nav a:hover {
            background: var(--primary);
            color: #fff;
            text-decoration: none;
        }
        nav.main-nav a i {
            margin-right: 6px;
            font-size: 0.85rem;
        }
        .nav-search-form {
            display: flex;
            align-items: center;
            background: var(--bg);
            border-radius: 30px;
            padding: 2px 2px 2px 16px;
            border: 1px solid var(--border);
            transition: border 0.2s;
        }
        .nav-search-form:focus-within {
            border-color: var(--primary-light);
        }
        .nav-search-form input {
            border: none;
            background: transparent;
            padding: 8px 4px;
            font-size: 0.9rem;
            outline: none;
            min-width: 120px;
            color: var(--text);
        }
        .nav-search-form button {
            background: var(--primary);
            border: none;
            color: #fff;
            padding: 8px 16px;
            border-radius: 30px;
            cursor: pointer;
            font-size: 0.85rem;
            transition: background 0.2s;
        }
        .nav-search-form button:hover {
            background: var(--primary-light);
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px 12px;
            font-size: 0.85rem;
            color: var(--text-light);
            padding: 10px 0 4px;
            border-top: 1px solid var(--border);
            margin-top: 12px;
        }
        .breadcrumb a {
            color: var(--text-light);
        }
        .breadcrumb a:hover {
            color: var(--primary-light);
        }
        .breadcrumb span {
            color: var(--primary);
            font-weight: 600;
        }
        main {
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 32px 28px;
            margin-bottom: 24px;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        h1 i {
            color: var(--secondary);
        }
        h2 {
            font-size: 1.9rem;
            font-weight: 700;
            color: var(--primary);
            margin-top: 48px;
            margin-bottom: 16px;
            padding-bottom: 8px;
            border-bottom: 3px solid var(--secondary);
        }
        h3 {
            font-size: 1.4rem;
            font-weight: 600;
            color: var(--primary-light);
            margin-top: 32px;
            margin-bottom: 12px;
        }
        h4 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--text);
            margin-top: 24px;
            margin-bottom: 8px;
        }
        p {
            margin-bottom: 16px;
            font-size: 1.05rem;
            color: var(--text);
        }
        .lead {
            font-size: 1.25rem;
            color: var(--text-light);
            font-weight: 400;
            line-height: 1.8;
        }
        .meta-info {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 32px;
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 24px;
            padding: 12px 0;
            border-bottom: 1px solid var(--border);
        }
        .meta-info i {
            margin-right: 6px;
            color: var(--secondary);
        }
        .last-updated {
            font-weight: 600;
            color: var(--primary);
        }
        .featured-img {
            margin: 28px 0 32px;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .featured-img img {
            width: 100%;
        }
        .featured-img figcaption {
            padding: 12px 16px;
            background: var(--bg);
            font-size: 0.9rem;
            color: var(--text-light);
            font-style: italic;
        }
        ul,
        ol {
            margin: 12px 0 20px 24px;
        }
        li {
            margin-bottom: 8px;
            font-size: 1.05rem;
        }
        li strong {
            color: var(--primary);
        }
        blockquote {
            border-left: 4px solid var(--secondary);
            background: var(--bg);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius) var(--radius) 0;
            font-style: italic;
            color: var(--text-light);
        }
        blockquote cite {
            display: block;
            margin-top: 8px;
            font-weight: 600;
            color: var(--primary);
        }
        .table-wrap {
            overflow-x: auto;
            margin: 24px 0;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
            background: var(--card-bg);
        }
        th {
            background: var(--primary);
            color: #fff;
            padding: 12px 16px;
            text-align: left;
            font-weight: 600;
        }
        td {
            padding: 10px 16px;
            border-bottom: 1px solid var(--border);
        }
        tr:last-child td {
            border-bottom: none;
        }
        tr:hover td {
            background: #f0f4fa;
        }
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 20px;
            margin: 24px 0;
        }
        .card-grid .card {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 20px 18px;
            transition: transform 0.2s, box-shadow 0.2s;
            border: 1px solid var(--border);
        }
        .card-grid .card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
        }
        .card-grid .card i {
            font-size: 2rem;
            color: var(--secondary);
            margin-bottom: 12px;
        }
        .card-grid .card h4 {
            margin-top: 0;
        }
        .interview {
            background: linear-gradient(135deg, #f8f9fe, #eef2f9);
            border-radius: var(--radius);
            padding: 24px 28px;
            margin: 28px 0;
            border-left: 4px solid var(--primary);
        }
        .interview .q {
            font-weight: 700;
            color: var(--primary);
        }
        .interview .a {
            margin-bottom: 16px;
            padding-left: 12px;
        }
        .feedback-section {
            margin-top: 48px;
            padding-top: 32px;
            border-top: 2px solid var(--border);
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            margin-top: 20px;
        }
        .feedback-card {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 24px;
            border: 1px solid var(--border);
        }
        .feedback-card h3 {
            margin-top: 0;
            font-size: 1.3rem;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .feedback-card label {
            font-weight: 600;
            font-size: 0.95rem;
        }
        .feedback-card input,
        .feedback-card textarea,
        .feedback-card select {
            padding: 10px 14px;
            border: 1px solid var(--border);
            border-radius: 8px;
            font-size: 1rem;
            font-family: var(--font);
            background: #fff;
            transition: border 0.2s;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            border-color: var(--primary-light);
            outline: none;
        }
        .feedback-card textarea {
            min-height: 90px;
            resize: vertical;
        }
        .feedback-card .btn-submit {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 12px 20px;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            display: flex;
            align-items: center;
            gap: 8px;
            justify-content: center;
        }
        .feedback-card .btn-submit:hover {
            background: var(--primary-light);
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            gap: 4px;
            justify-content: flex-end;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.8rem;
            color: #ccc;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating input:checked~label,
        .star-rating label:hover,
        .star-rating label:hover~label {
            color: var(--secondary);
        }
        footer {
            background: var(--card-bg);
            border-radius: var(--radius) var(--radius) 0 0;
            box-shadow: var(--shadow);
            padding: 28px 24px 20px;
            margin-bottom: 0;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 24px;
        }
        .footer-inner h4 {
            color: var(--primary);
            font-size: 1.1rem;
            margin-top: 0;
            margin-bottom: 12px;
        }
        .footer-inner ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-inner li {
            margin-bottom: 6px;
        }
        .footer-inner a {
            color: var(--text-light);
            font-size: 0.95rem;
        }
        .footer-inner a:hover {
            color: var(--primary-light);
        }
        friend-link {
            display: block;
            background: var(--bg);
            border-radius: 8px;
            padding: 16px 20px;
            margin: 12px 0 20px;
            font-size: 0.95rem;
            color: var(--text-light);
            border: 1px solid var(--border);
        }
        friend-link a {
            color: var(--primary-light);
            font-weight: 500;
            margin: 0 4px;
        }
        friend-link a:hover {
            color: var(--secondary);
        }
        .copyright {
            border-top: 1px solid var(--border);
            padding-top: 16px;
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-light);
        }
        .copyright strong {
            color: var(--primary);
        }
        @media (max-width: 900px) {
            .feedback-grid {
                grid-template-columns: 1fr;
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            body {
                padding: 0 10px;
            }
            header {
                padding: 12px 16px;
            }
            .header-inner {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            nav.main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background: var(--card-bg);
                padding: 12px 0 16px;
                border-top: 1px solid var(--border);
                gap: 6px;
            }
            nav.main-nav.open {
                display: flex;
            }
            nav.main-nav a {
                padding: 10px 16px;
                width: 100%;
                border-radius: 6px;
            }
            .nav-search-form {
                width: 100%;
                margin-top: 8px;
            }
            .nav-search-form input {
                width: 1px;
                flex: 1;
                min-width: 0;
            }
            main {
                padding: 20px 16px;
            }
            h1 {
                font-size: 1.9rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.2rem;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .meta-info {
                flex-direction: column;
                gap: 6px;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .my-logo {
                font-size: 1.4rem;
            }
            .my-logo i {
                font-size: 1.5rem;
            }
            h1 {
                font-size: 1.6rem;
            }
            .feedback-card {
                padding: 16px;
            }
        }
        .nav-toggle {
            display: none;
        }
        .nav-toggle:checked~.main-nav {
            display: flex;
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: none;
            }
        }
        .tip {
            background: #eaf7e8;
            border-left: 4px solid #2ecc71;
            padding: 16px 20px;
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 20px 0;
        }
        .tip strong {
            color: #1a7a3a;
        }
        .warning {
            background: #fef9e7;
            border-left: 4px solid var(--secondary);
            padding: 16px 20px;
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 20px 0;
        }