*,
        *::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, sans-serif;
            background: #f5f7fa;
            color: #2d3436;
            line-height: 1.7;
            padding: 0 16px;
        }
        a {
            color: #1a5c2a;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #d4a017;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: #ffffff;
            box-shadow: 0 0 40px rgba(0, 0, 0, 0.04);
            border-radius: 24px;
            padding: 20px 28px 32px;
            margin-top: 16px;
            margin-bottom: 16px;
        }
        header {
            padding: 20px 0 12px;
            border-bottom: 2px solid #e8edf0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            position: relative;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #1a5c2a, #d4a017);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .my-logo i {
            -webkit-text-fill-color: #d4a017;
            font-size: 1.6rem;
        }
        .my-logo:hover {
            opacity: 0.85;
            text-decoration: none;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 20px;
        }
        nav {
            display: flex;
            gap: 18px;
            flex-wrap: wrap;
        }
        nav a {
            font-weight: 600;
            font-size: 0.95rem;
            padding: 6px 0;
            position: relative;
            color: #2d3436;
        }
        nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: #1a5c2a;
            transition: width 0.25s ease;
        }
        nav a:hover::after {
            width: 100%;
        }
        nav a:hover {
            text-decoration: none;
            color: #1a5c2a;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 4px 8px;
            color: #1a5c2a;
            transition: transform 0.2s;
        }
        .hamburger:hover {
            transform: scale(1.1);
        }
        .breadcrumb {
            padding: 12px 0 8px;
            font-size: 0.85rem;
            color: #636e72;
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            align-items: center;
            width: 100%;
            border-bottom: 1px solid #f0f2f4;
            margin-bottom: 16px;
        }
        .breadcrumb a {
            color: #1a5c2a;
        }
        .breadcrumb span {
            color: #b2bec3;
        }
        .search-bar {
            display: flex;
            gap: 8px;
            max-width: 480px;
            margin: 20px 0 24px;
            width: 100%;
        }
        .search-bar input {
            flex: 1;
            padding: 12px 18px;
            border: 2px solid #dfe6e9;
            border-radius: 40px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.25s ease, box-shadow 0.25s ease;
            background: #f8f9fa;
        }
        .search-bar input:focus {
            border-color: #1a5c2a;
            box-shadow: 0 0 0 4px rgba(26, 92, 42, 0.1);
        }
        .search-bar button {
            background: #1a5c2a;
            color: #fff;
            border: none;
            border-radius: 40px;
            padding: 0 24px;
            font-weight: 700;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.2s ease, transform 0.15s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-bar button:hover {
            background: #d4a017;
            transform: scale(1.02);
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            color: #1a5c2a;
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: #1a5c2a;
            margin-top: 48px;
            margin-bottom: 16px;
            padding-bottom: 6px;
            border-bottom: 3px solid #d4a017;
            display: inline-block;
        }
        h3 {
            font-size: 1.35rem;
            font-weight: 700;
            color: #2d3436;
            margin-top: 32px;
            margin-bottom: 10px;
        }
        h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: #2d3436;
            margin-top: 20px;
            margin-bottom: 8px;
        }
        p {
            margin-bottom: 16px;
            font-size: 1.02rem;
            color: #2d3436;
        }
        .lead {
            font-size: 1.15rem;
            color: #555;
            font-weight: 400;
        }
        strong {
            color: #1a5c2a;
        }
        .highlight {
            background: #fef9e7;
            padding: 2px 8px;
            border-radius: 6px;
            font-weight: 600;
        }
        .featured-image {
            margin: 28px 0 32px;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
        }
        .featured-image img {
            width: 100%;
            max-height: 520px;
            object-fit: cover;
        }
        .featured-image figcaption {
            padding: 12px 18px;
            background: #f0f4f0;
            font-size: 0.9rem;
            color: #555;
            font-style: italic;
        }
        .interview-block {
            background: #f0f7f3;
            border-left: 6px solid #d4a017;
            padding: 24px 28px;
            border-radius: 16px;
            margin: 28px 0;
        }
        .interview-block p {
            margin-bottom: 10px;
        }
        .interview-block .attribution {
            font-weight: 700;
            color: #1a5c2a;
            margin-top: 8px;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin: 28px 0;
        }
        .stat-card {
            background: #f8faf8;
            padding: 20px 18px;
            border-radius: 16px;
            text-align: center;
            border: 1px solid #e8edf0;
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }
        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 28px rgba(0, 0, 0, 0.06);
        }
        .stat-card .number {
            font-size: 2.2rem;
            font-weight: 800;
            color: #d4a017;
        }
        .stat-card .label {
            font-size: 0.95rem;
            color: #636e72;
            margin-top: 4px;
        }
        .drill-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 18px;
            margin: 20px 0 28px;
        }
        .drill-item {
            background: #ffffff;
            border: 1px solid #e8edf0;
            border-radius: 16px;
            padding: 20px 20px 22px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
            transition: transform 0.2s ease, border-color 0.2s;
        }
        .drill-item:hover {
            transform: translateY(-3px);
            border-color: #d4a017;
        }
        .drill-item h4 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .drill-item h4 i {
            color: #d4a017;
            font-size: 1.2rem;
        }
        .feedback-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            margin: 36px 0 20px;
            background: #f8faf8;
            padding: 28px 28px 32px;
            border-radius: 20px;
            border: 1px solid #e8edf0;
        }
        .feedback-section h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .feedback-section form {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .feedback-section input,
        .feedback-section textarea,
        .feedback-section select {
            padding: 12px 16px;
            border: 2px solid #dfe6e9;
            border-radius: 12px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.2s, box-shadow 0.2s;
            background: #fff;
            font-family: inherit;
        }
        .feedback-section input:focus,
        .feedback-section textarea:focus,
        .feedback-section select:focus {
            border-color: #1a5c2a;
            box-shadow: 0 0 0 4px rgba(26, 92, 42, 0.08);
        }
        .feedback-section textarea {
            min-height: 90px;
            resize: vertical;
        }
        .feedback-section .btn-submit {
            background: #1a5c2a;
            color: #fff;
            border: none;
            padding: 12px 20px;
            border-radius: 40px;
            font-weight: 700;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.15s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            align-self: flex-start;
        }
        .feedback-section .btn-submit:hover {
            background: #d4a017;
            transform: scale(1.02);
        }
        .rating-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .rating-group select {
            max-width: 200px;
        }
        friend-link {
            display: block;
            padding: 18px 0 12px;
            border-top: 2px solid #e8edf0;
            margin-top: 28px;
            font-size: 0.95rem;
        }
        friend-link a {
            display: inline-block;
            margin: 4px 16px 4px 0;
            padding: 4px 0;
        }
        footer {
            border-top: 2px solid #e8edf0;
            padding: 24px 0 12px;
            margin-top: 24px;
            text-align: center;
            font-size: 0.9rem;
            color: #636e72;
        }
        footer .copyright {
            font-weight: 500;
            color: #2d3436;
        }
        .last-updated {
            display: inline-block;
            background: #f0f4f0;
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 0.85rem;
            color: #555;
            margin: 8px 0 16px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 12px 14px 20px;
                border-radius: 16px;
                margin-top: 8px;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.35rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .nav-wrapper {
                gap: 10px;
            }
            nav {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #ffffff;
                padding: 18px 20px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
                border-radius: 0 0 16px 16px;
                z-index: 99;
                gap: 12px;
                border-top: 2px solid #e8edf0;
            }
            nav.open {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .feedback-section {
                grid-template-columns: 1fr;
                padding: 20px 16px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .drill-list {
                grid-template-columns: 1fr;
            }
            .search-bar {
                flex-direction: column;
            }
            .search-bar button {
                justify-content: center;
                padding: 12px;
            }
            .breadcrumb {
                font-size: 0.75rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 8px 10px 16px;
            }
            h1 {
                font-size: 1.5rem;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .my-logo {
                font-size: 1.2rem;
            }
            .my-logo i {
                font-size: 1.2rem;
            }
        }
        .flex-between {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            align-items: center;
        }
        .gap-8 {
            gap: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mb-8 {
            margin-bottom: 8px;
        }
        .text-center {
            text-align: center;
        }
        .emoji-lg {
            font-size: 1.4rem;
        }