*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            background: #f4f7fb;
            color: #1e2a3a;
            line-height: 1.7;
            font-size: 1.05rem;
            padding: 0 1rem;
        }
        a {
            color: #0d6b8b;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #023b4d;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 10px;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            background: #ffffff;
            box-shadow: 0 0 40px rgba(0, 0, 0, 0.04);
            border-radius: 24px;
            padding: 1.8rem 2.5rem;
        }
        @media (max-width: 768px) {
            body {
                padding: 0 0.5rem;
            }
            .container {
                padding: 1rem 1.2rem;
                border-radius: 16px;
            }
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 0.8rem 0 1.2rem 0;
            border-bottom: 2px solid #e8edf2;
            margin-bottom: 1.2rem;
            position: relative;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(145deg, #0d6b8b, #023b4d);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .my-logo i {
            -webkit-text-fill-color: #0d6b8b;
            font-size: 2rem;
        }
        .my-logo:hover {
            text-decoration: none;
            opacity: 0.85;
        }
        .my-logo small {
            font-size: 0.75rem;
            font-weight: 400;
            -webkit-text-fill-color: #5e6f7e;
            letter-spacing: 0.3px;
            display: block;
        }
        .nav-bar {
            display: flex;
            align-items: center;
            gap: 0.2rem;
            flex-wrap: wrap;
        }
        .nav-bar a {
            padding: 0.5rem 1rem;
            border-radius: 30px;
            font-weight: 500;
            font-size: 0.95rem;
            color: #1e2a3a;
            transition: background 0.2s, color 0.2s;
        }
        .nav-bar a:hover {
            background: #e1ecf5;
            color: #0d6b8b;
            text-decoration: none;
        }
        .nav-bar a.active {
            background: #0d6b8b;
            color: #fff;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.9rem;
            color: #1e2a3a;
            cursor: pointer;
            padding: 0.2rem 0.5rem;
            border-radius: 10px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: #e1ecf5;
        }
        @media (max-width: 860px) {
            .hamburger {
                display: inline-block;
            }
            .nav-bar {
                display: none;
                width: 100%;
                flex-direction: column;
                background: #ffffff;
                padding: 1rem 0.5rem;
                border-radius: 20px;
                box-shadow: 0 12px 30px rgba(0, 0, 0, 0.06);
                margin-top: 0.8rem;
            }
            .nav-bar.open {
                display: flex;
            }
            .nav-bar a {
                padding: 0.7rem 1.2rem;
                width: 100%;
                border-radius: 12px;
            }
            .site-header {
                align-items: center;
            }
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0.6rem 0 1rem 0;
            font-size: 0.9rem;
            color: #5e6f7e;
            gap: 0.4rem;
        }
        .breadcrumb li+li::before {
            content: "›";
            padding: 0 0.5rem 0 0.2rem;
            color: #a0b3c4;
            font-weight: 600;
        }
        .breadcrumb a {
            color: #0d6b8b;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb .current {
            color: #2c3e50;
            font-weight: 500;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            margin: 1.4rem 0 0.8rem 0;
            color: #023b4d;
            letter-spacing: -0.5px;
        }
        h2 {
            font-size: 2rem;
            font-weight: 700;
            margin: 2.4rem 0 1rem 0;
            padding-bottom: 0.4rem;
            border-bottom: 3px solid #e1ecf5;
            color: #0d4a5e;
        }
        h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin: 1.8rem 0 0.8rem 0;
            color: #1a3b4a;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
            margin: 1.2rem 0 0.5rem 0;
            color: #2c4d5e;
        }
        p {
            margin-bottom: 1.1rem;
        }
        .lead {
            font-size: 1.2rem;
            color: #2c4d5e;
            font-weight: 400;
            background: #f0f6fc;
            padding: 1.4rem 1.8rem;
            border-radius: 16px;
            border-left: 6px solid #0d6b8b;
        }
        .search-box {
            display: flex;
            max-width: 520px;
            margin: 1.8rem 0 2rem 0;
            border-radius: 60px;
            overflow: hidden;
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.04);
            border: 1px solid #dce4ec;
        }
        .search-box input {
            flex: 1;
            padding: 0.9rem 1.4rem;
            border: none;
            font-size: 1rem;
            background: #fff;
            outline: none;
            font-family: inherit;
        }
        .search-box button {
            background: #0d6b8b;
            color: #fff;
            border: none;
            padding: 0 1.8rem;
            font-size: 1.1rem;
            cursor: pointer;
            transition: background 0.2s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-box button:hover {
            background: #023b4d;
        }
        .feature-image {
            margin: 2rem 0 2.5rem 0;
            border-radius: 16px;
            overflow: hidden;
            background: #eef4f9;
            text-align: center;
        }
        .feature-image img {
            width: 100%;
            max-height: 460px;
            object-fit: cover;
        }
        .feature-image figcaption {
            padding: 0.8rem 1rem;
            font-size: 0.9rem;
            color: #5e6f7e;
            background: #f7fafd;
        }
        .user-feedback {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin: 3rem 0 2rem 0;
            padding: 2rem 0;
            border-top: 2px solid #e8edf2;
        }
        @media (max-width: 700px) {
            .user-feedback {
                grid-template-columns: 1fr;
                gap: 2.5rem;
            }
        }
        .feedback-card {
            background: #f9fcff;
            padding: 1.6rem 1.8rem;
            border-radius: 20px;
            border: 1px solid #e4ecf3;
        }
        .feedback-card h3 {
            margin-top: 0;
            border-bottom: none;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .feedback-card textarea,
        .feedback-card input {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid #d0dce8;
            border-radius: 12px;
            font-family: inherit;
            font-size: 0.95rem;
            background: #fff;
            margin-bottom: 0.8rem;
            resize: vertical;
            transition: border 0.2s;
        }
        .feedback-card textarea:focus,
        .feedback-card input:focus {
            border-color: #0d6b8b;
            outline: none;
            box-shadow: 0 0 0 3px rgba(13, 107, 139, 0.1);
        }
        .feedback-card .btn {
            padding: 0.7rem 1.8rem;
            background: #0d6b8b;
            color: #fff;
            border: none;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .feedback-card .btn:hover {
            background: #023b4d;
            transform: translateY(-1px);
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.2rem;
            margin: 0.6rem 0 1rem 0;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.8rem;
            color: #ccd9e6;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f5b342;
        }
        friend-link {
            display: block;
            padding: 1.8rem 0 0.8rem 0;
            border-top: 2px solid #e8edf2;
            margin-top: 2rem;
        }
        friend-link p {
            font-weight: 600;
            margin-bottom: 0.8rem;
            color: #2c4d5e;
        }
        friend-link a {
            display: inline-block;
            margin: 0.3rem 1.2rem 0.3rem 0;
            padding: 0.3rem 1rem;
            background: #f0f5fa;
            border-radius: 30px;
            font-size: 0.9rem;
            transition: background 0.2s;
        }
        friend-link a:hover {
            background: #dce9f2;
            text-decoration: none;
        }
        .site-footer {
            padding: 2rem 0 1rem 0;
            border-top: 2px solid #e8edf2;
            margin-top: 2rem;
            font-size: 0.9rem;
            color: #5e6f7e;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
        }
        .site-footer .copyright {
            font-weight: 400;
        }
        @media (max-width: 600px) {
            .site-footer {
                flex-direction: column;
                gap: 0.8rem;
                text-align: center;
            }
        }
        .highlight-box {
            background: #f2f8fe;
            padding: 1.6rem 2rem;
            border-radius: 18px;
            margin: 1.6rem 0;
            border-left: 6px solid #0d6b8b;
        }
        .highlight-box strong {
            color: #023b4d;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.8rem;
            margin: 1.6rem 0;
        }
        @media (max-width: 640px) {
            .grid-2 {
                grid-template-columns: 1fr;
            }
        }
        .emoji-big {
            font-size: 1.6rem;
            margin-right: 0.3rem;
        }
        .last-updated {
            display: inline-block;
            background: #eef4f9;
            padding: 0.3rem 1.2rem;
            border-radius: 40px;
            font-size: 0.85rem;
            color: #3b5e70;
            margin-bottom: 0.8rem;
        }
        .toc {
            background: #f7fafd;
            padding: 1.4rem 2rem;
            border-radius: 18px;
            margin: 1.6rem 0;
        }
        .toc ul {
            columns: 2;
            column-gap: 2rem;
            list-style: none;
            padding: 0;
        }
        .toc ul li {
            padding: 0.25rem 0;
            break-inside: avoid;
        }
        .toc ul li a {
            color: #0d6b8b;
            font-weight: 500;
        }
        @media (max-width: 500px) {
            .toc ul {
                columns: 1;
            }
        }
        .interview-block {
            background: #f3f0e8;
            padding: 1.8rem 2rem;
            border-radius: 20px;
            margin: 2rem 0;
            border: 1px solid #e2dcd0;
        }
        .interview-block p:last-child {
            margin-bottom: 0;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 1rem;
            margin: 1.6rem 0;
        }
        .stat-card {
            background: #fff;
            border: 1px solid #e4ecf3;
            border-radius: 16px;
            padding: 1.2rem 0.8rem;
            text-align: center;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
        }
        .stat-card .num {
            font-size: 2rem;
            font-weight: 800;
            color: #0d6b8b;
        }
        .stat-card .label {
            font-size: 0.85rem;
            color: #5e6f7e;
            margin-top: 0.2rem;
        }
        .scroll-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            background: #0d6b8b;
            color: #fff;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
            transition: background 0.2s, transform 0.2s;
            border: none;
            cursor: pointer;
            z-index: 99;
        }
        .scroll-top:hover {
            background: #023b4d;
            transform: translateY(-4px);
        }
        @media (max-width: 600px) {
            .scroll-top {
                bottom: 1rem;
                right: 1rem;
                width: 44px;
                height: 44px;
                font-size: 1.2rem;
            }
        }