*,
        *::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, 'Helvetica Neue', sans-serif;
            background: #f4f7fc;
            color: #1a2a3a;
            line-height: 1.7;
            padding: 0 1rem;
        }
        a {
            color: #0057a3;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #003d73;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: #ffffff;
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.06);
            border-radius: 24px;
            padding: 1.5rem 2rem 2rem;
        }
        @media (max-width: 768px) {
            body {
                padding: 0 0.5rem;
            }
            .container {
                padding: 1rem 1rem 1.5rem;
                border-radius: 16px;
            }
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 0.75rem 0 1rem;
            border-bottom: 2px solid #e6edf5;
            position: relative;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(145deg, #0a3a5c, #1b6b8f);
            -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: #1b6b8f;
            font-size: 1.7rem;
        }
        .my-logo:hover {
            text-decoration: none;
            opacity: 0.85;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 1.2rem;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 0.2rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .nav-list li a {
            display: inline-block;
            padding: 0.5rem 0.9rem;
            border-radius: 40px;
            font-weight: 500;
            font-size: 0.9rem;
            color: #1a2a3a;
            transition: background 0.2s, color 0.2s;
        }
        .nav-list li a:hover {
            background: #e1edf7;
            color: #0057a3;
            text-decoration: none;
        }
        .nav-list li a i {
            margin-right: 0.35rem;
            font-size: 0.85rem;
            color: #1b6b8f;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: #0a3a5c;
            cursor: pointer;
            padding: 0.2rem 0.4rem;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: #e1edf7;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #ffffff;
                border: 1px solid #dce6ef;
                border-radius: 16px;
                padding: 0.8rem 0.4rem;
                margin-top: 0.8rem;
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                z-index: 100;
            }
            .nav-list.open {
                display: flex;
            }
            .nav-wrapper {
                flex-wrap: wrap;
            }
            .site-header {
                position: relative;
            }
            .nav-list li a {
                padding: 0.6rem 1rem;
                width: 100%;
                border-radius: 10px;
            }
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0.7rem 0 0.2rem;
            font-size: 0.85rem;
            color: #5a6f7e;
            gap: 0.3rem 0.6rem;
            margin-bottom: 0.2rem;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #9aafbf;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #0057a3;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb .active {
            color: #2c3e4f;
            font-weight: 500;
        }
        .hero-section {
            text-align: center;
            padding: 2rem 0 1.8rem;
        }
        .hero-section h1 {
            font-size: 2.8rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            line-height: 1.2;
            color: #0a2a3a;
            margin-bottom: 0.6rem;
        }
        .hero-section h1 i {
            color: #1b6b8f;
            margin-right: 0.3rem;
        }
        .hero-sub {
            font-size: 1.1rem;
            color: #3d5a6e;
            max-width: 720px;
            margin: 0 auto 1rem;
        }
        .hero-meta {
            font-size: 0.9rem;
            color: #6d8a9e;
            display: flex;
            justify-content: center;
            gap: 1.2rem;
            flex-wrap: wrap;
        }
        .hero-meta i {
            margin-right: 0.3rem;
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2rem;
            }
            .hero-sub {
                font-size: 1rem;
            }
        }
        .search-wrap {
            background: #f0f5fa;
            border-radius: 60px;
            padding: 0.25rem 0.25rem 0.25rem 1.5rem;
            display: flex;
            max-width: 520px;
            margin: 1.6rem auto 0.8rem;
            border: 1px solid #d4e0ea;
            transition: box-shadow 0.3s;
        }
        .search-wrap:focus-within {
            box-shadow: 0 0 0 3px rgba(0, 87, 163, 0.2);
            border-color: #0057a3;
        }
        .search-wrap input {
            flex: 1;
            border: none;
            background: transparent;
            padding: 0.7rem 0;
            font-size: 0.95rem;
            outline: none;
            color: #1a2a3a;
        }
        .search-wrap input::placeholder {
            color: #8aa0b2;
        }
        .search-wrap button {
            background: #0057a3;
            border: none;
            color: #fff;
            font-weight: 600;
            padding: 0.6rem 1.6rem;
            border-radius: 40px;
            cursor: pointer;
            font-size: 0.9rem;
            transition: background 0.25s;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .search-wrap button:hover {
            background: #003d73;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            margin: 2rem 0 1.5rem;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
        }
        .main-content h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #0a2a3a;
            margin: 2.2rem 0 0.8rem;
            padding-bottom: 0.3rem;
            border-bottom: 3px solid #d4e4f0;
        }
        .main-content h2 i {
            color: #1b6b8f;
            margin-right: 0.5rem;
        }
        .main-content h3 {
            font-size: 1.4rem;
            font-weight: 600;
            color: #15445c;
            margin: 1.8rem 0 0.6rem;
        }
        .main-content h3 i {
            color: #2a7a9e;
            margin-right: 0.4rem;
            font-size: 1.2rem;
        }
        .main-content h4 {
            font-size: 1.15rem;
            font-weight: 600;
            color: #1f5770;
            margin: 1.4rem 0 0.4rem;
        }
        .main-content p {
            margin: 0.8rem 0 1rem;
            color: #1f3444;
        }
        .main-content p b,
        .main-content p strong {
            color: #0a2a3a;
        }
        .main-content ul,
        .main-content ol {
            margin: 0.6rem 0 1.2rem 1.4rem;
            color: #1f3444;
        }
        .main-content li {
            margin-bottom: 0.3rem;
        }
        .main-content .insight-box {
            background: #edf4fa;
            border-left: 5px solid #1b6b8f;
            padding: 1.2rem 1.6rem;
            border-radius: 12px;
            margin: 1.4rem 0;
        }
        .main-content .insight-box i {
            color: #1b6b8f;
            margin-right: 0.5rem;
        }
        .img-wrapper {
            margin: 1.8rem 0;
            border-radius: 14px;
            overflow: hidden;
            background: #eef3f8;
            padding: 0.5rem;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
        }
        .img-wrapper img {
            border-radius: 10px;
            width: 100%;
        }
        .img-wrapper figcaption {
            padding: 0.7rem 0.5rem 0.3rem;
            font-size: 0.9rem;
            color: #3d5a6e;
            text-align: center;
            font-style: italic;
        }
        .sidebar {
            background: #f8fafc;
            border-radius: 20px;
            padding: 1.6rem 1.4rem;
            border: 1px solid #e4ecf3;
            position: sticky;
            top: 1.5rem;
            align-self: start;
        }
        .sidebar h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: #0a2a3a;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
        }
        .sidebar ul li {
            padding: 0.5rem 0;
            border-bottom: 1px solid #e4ecf3;
        }
        .sidebar ul li:last-child {
            border-bottom: none;
        }
        .sidebar ul li a {
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .sidebar ul li a i {
            color: #1b6b8f;
            width: 1.1rem;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .sidebar {
                position: static;
                margin-top: 0.5rem;
            }
        }
        .feedback-section {
            margin: 2.8rem 0 1.8rem;
            padding-top: 1.5rem;
            border-top: 2px solid #e4ecf3;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }
        .feedback-card {
            background: #f8fafc;
            border-radius: 18px;
            padding: 1.5rem 1.8rem;
            border: 1px solid #e4ecf3;
        }
        .feedback-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: #0a2a3a;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 0.9rem;
        }
        .feedback-card form input,
        .feedback-card form textarea {
            padding: 0.7rem 1rem;
            border: 1px solid #d4e0ea;
            border-radius: 12px;
            font-size: 0.95rem;
            font-family: inherit;
            background: #fff;
            transition: border 0.2s;
            resize: vertical;
        }
        .feedback-card form input:focus,
        .feedback-card form textarea:focus {
            border-color: #0057a3;
            outline: none;
            box-shadow: 0 0 0 3px rgba(0, 87, 163, 0.12);
        }
        .feedback-card form button {
            background: #0057a3;
            color: #fff;
            border: none;
            padding: 0.7rem 1.6rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.25s;
            align-self: flex-start;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .feedback-card form button:hover {
            background: #003d73;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.2rem;
            font-size: 1.6rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            color: #d0dce6;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #f5b342;
        }
        @media (max-width: 768px) {
            .feedback-grid {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
            .feedback-card {
                padding: 1.2rem 1.2rem;
            }
        }
        .site-footer {
            margin-top: 2.5rem;
            padding: 1.8rem 0 1rem;
            border-top: 2px solid #e4ecf3;
        }
        .footer-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 1.5rem;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1.2rem 2rem;
        }
        .footer-links a {
            color: #2c5f7a;
            font-weight: 500;
        }
        .footer-links a:hover {
            color: #003d73;
        }
        .footer-copy {
            color: #4d6b7e;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 0.3rem;
            flex-wrap: wrap;
        }
        .footer-copy i {
            color: #1b6b8f;
        }
        friend-link {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem 1.6rem;
            background: #f0f5fa;
            padding: 1rem 1.4rem;
            border-radius: 16px;
            margin-bottom: 1.2rem;
            font-size: 0.9rem;
        }
        friend-link a {
            font-weight: 500;
            color: #0057a3;
        }
        friend-link a:hover {
            text-decoration: underline;
        }
        friend-link::before {
            content: "🤝 Friends & Related";
            font-weight: 700;
            color: #0a2a3a;
            width: 100%;
            margin-bottom: 0.2rem;
            font-size: 0.95rem;
        }
        @media (max-width: 768px) {
            .footer-inner {
                flex-direction: column;
                gap: 0.8rem;
            }
            .footer-links {
                gap: 0.8rem 1.2rem;
            }
        }
        @media (max-width: 480px) {
            .hero-section h1 {
                font-size: 1.6rem;
            }
            .search-wrap {
                flex-direction: column;
                border-radius: 20px;
                padding: 0.6rem 0.6rem;
                gap: 0.4rem;
                background: #f0f5fa;
            }
            .search-wrap input {
                padding: 0.5rem 0.8rem;
                border-radius: 30px;
                background: #fff;
            }
            .search-wrap button {
                width: 100%;
                justify-content: center;
            }
            .main-content h2 {
                font-size: 1.5rem;
            }
            .main-content h3 {
                font-size: 1.2rem;
            }
        }
        .badge {
            display: inline-block;
            background: #e1edf7;
            color: #0057a3;
            padding: 0.15rem 0.8rem;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .emoji-big {
            font-size: 1.3rem;
        }
        hr {
            border: none;
            height: 2px;
            background: linear-gradient(to right, #d4e4f0, transparent);
            margin: 1.6rem 0;
        }