* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, sans-serif;
            background: #f4f7fb;
            color: #1e293b;
            line-height: 1.7;
            padding: 0;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: #0f3b5e;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover {
            color: #d93c2b;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 16px;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .flex-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
        }
        .gap-2 {
            gap: 12px;
        }
        .text-center {
            text-align: center;
        }
        .mt-1 {
            margin-top: 12px;
        }
        .mt-2 {
            margin-top: 24px;
        }
        .mt-3 {
            margin-top: 40px;
        }
        .mb-2 {
            margin-bottom: 24px;
        }
        .section-badge {
            display: inline-block;
            background: linear-gradient(135deg, #0f3b5e, #1a5a7a);
            color: #fff;
            padding: 4px 18px;
            border-radius: 40px;
            font-size: 0.8rem;
            letter-spacing: 0.5px;
            font-weight: 600;
            text-transform: uppercase;
        }
        .site-header {
            background: #ffffff;
            border-bottom: 2px solid #e9edf2;
            padding: 14px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.03);
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            color: #0f3b5e;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: #d93c2b;
            font-size: 2rem;
        }
        .my-logo:hover {
            text-decoration: none;
            color: #1a5a7a;
        }
        .my-logo span {
            font-weight: 300;
            color: #5a7a8e;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: #0f3b5e;
            cursor: pointer;
            padding: 4px 8px;
        }
        .nav-menu {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            align-items: center;
        }
        .nav-menu a {
            padding: 8px 18px;
            border-radius: 40px;
            font-weight: 500;
            font-size: 0.95rem;
            color: #1e293b;
            transition: background 0.2s, color 0.2s;
        }
        .nav-menu a:hover {
            background: #e9edf2;
            color: #0f3b5e;
            text-decoration: none;
        }
        .nav-menu .nav-highlight {
            background: #0f3b5e;
            color: #fff;
        }
        .nav-menu .nav-highlight:hover {
            background: #1a5a7a;
            color: #fff;
        }
        .breadcrumb-wrap {
            background: #ffffff;
            padding: 10px 0;
            border-bottom: 1px solid #e9edf2;
            font-size: 0.9rem;
        }
        .breadcrumb-wrap ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
            padding: 0;
            margin: 0;
        }
        .breadcrumb-wrap li+li::before {
            content: "›";
            margin-right: 10px;
            color: #8a9aa8;
        }
        .breadcrumb-wrap a {
            color: #2a5a7a;
        }
        .breadcrumb-wrap .current {
            color: #5a7a8e;
            font-weight: 500;
        }
        .hero {
            background: linear-gradient(145deg, #0a2233, #1a4a6a);
            color: #fff;
            padding: 60px 0 50px;
            border-radius: 0 0 48px 48px;
            margin-bottom: 40px;
        }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.5px;
            max-width: 900px;
        }
        .hero h1 i {
            color: #f7d44a;
        }
        .hero p {
            font-size: 1.3rem;
            opacity: 0.9;
            max-width: 700px;
            margin-top: 18px;
            font-weight: 300;
        }
        .hero .hero-meta {
            margin-top: 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 24px 40px;
            font-size: 1rem;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            padding-top: 22px;
        }
        .hero .hero-meta i {
            margin-right: 8px;
            color: #f7d44a;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
            margin: 30px 0 50px;
        }
        .content-area {
            background: #fff;
            border-radius: 24px;
            padding: 36px 40px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
        }
        .sidebar-area {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 20px;
            padding: 24px 22px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
            border: 1px solid #eef2f6;
        }
        .sidebar-card h3 {
            font-size: 1.2rem;
            border-bottom: 2px solid #e9edf2;
            padding-bottom: 12px;
            margin-bottom: 16px;
            color: #0f3b5e;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
        }
        .sidebar-card li {
            padding: 8px 0;
            border-bottom: 1px solid #f0f2f5;
        }
        .sidebar-card li:last-child {
            border-bottom: none;
        }
        .sidebar-card a {
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card a i {
            color: #d93c2b;
            font-size: 0.9rem;
        }
        h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #0a2233;
            margin-top: 44px;
            margin-bottom: 18px;
            border-left: 5px solid #d93c2b;
            padding-left: 18px;
        }
        h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: #1a3a4a;
            margin-top: 32px;
            margin-bottom: 12px;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
            color: #2a4a5a;
            margin-top: 24px;
            margin-bottom: 8px;
        }
        p {
            margin-bottom: 18px;
            font-size: 1.05rem;
        }
        .content-area p {
            color: #2d3f4f;
        }
        .highlight-box {
            background: #f0f6fe;
            border-left: 5px solid #0f3b5e;
            padding: 20px 24px;
            border-radius: 12px;
            margin: 24px 0;
        }
        .highlight-box i {
            color: #d93c2b;
            margin-right: 8px;
        }
        .emoji-big {
            font-size: 1.8rem;
            vertical-align: middle;
        }
        .feature-image {
            margin: 32px 0 28px;
            border-radius: 20px;
            overflow: hidden;
        }
        .feature-image figcaption {
            font-size: 0.9rem;
            color: #5a7a8e;
            padding: 12px 6px 0;
            font-style: italic;
        }
        .interact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin: 44px 0 20px;
        }
        .interact-card {
            background: #f8fafc;
            border-radius: 20px;
            padding: 24px 26px;
            border: 1px solid #e9edf2;
        }
        .interact-card h3 {
            margin-top: 0;
            font-size: 1.3rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .interact-card input,
        .interact-card textarea,
        .interact-card select {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid #d0d8e0;
            border-radius: 40px;
            font-size: 1rem;
            background: #fff;
            transition: border 0.2s;
            margin-top: 8px;
            font-family: inherit;
        }
        .interact-card textarea {
            border-radius: 16px;
            min-height: 80px;
            resize: vertical;
        }
        .interact-card input:focus,
        .interact-card textarea:focus,
        .interact-card select:focus {
            outline: none;
            border-color: #0f3b5e;
            box-shadow: 0 0 0 3px rgba(15, 59, 94, 0.1);
        }
        .btn {
            background: #0f3b5e;
            color: #fff;
            border: none;
            padding: 12px 30px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.25s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-top: 12px;
        }
        .btn:hover {
            background: #1a5a7a;
            transform: translateY(-1px);
        }
        .btn i {
            font-size: 1rem;
        }
        .score-stars {
            display: flex;
            gap: 6px;
            font-size: 1.8rem;
            color: #d0d8e0;
            cursor: pointer;
            margin: 10px 0 6px;
        }
        .score-stars i.active {
            color: #f7b731;
        }
        .score-stars i:hover,
        .score-stars i.hover {
            color: #f7b731;
        }
        .site-footer {
            background: #0a1f2e;
            color: #c8d6e0;
            padding: 48px 0 32px;
            margin-top: 60px;
            border-radius: 40px 40px 0 0;
        }
        .site-footer .container {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
        }
        .site-footer h4 {
            color: #fff;
            font-weight: 600;
            font-size: 1.1rem;
            margin-bottom: 16px;
            border-left: 3px solid #d93c2b;
            padding-left: 14px;
        }
        .site-footer a {
            color: #b0c8d8;
        }
        .site-footer a:hover {
            color: #f7d44a;
        }
        .site-footer .copyright {
            grid-column: 1 / -1;
            border-top: 1px solid #1a3a4a;
            padding-top: 24px;
            margin-top: 20px;
            font-size: 0.9rem;
            text-align: center;
            color: #7a9aaa;
        }
        friend-link {
            display: block;
            background: #122a3a;
            padding: 18px 22px;
            border-radius: 16px;
            margin-top: 12px;
            font-size: 0.95rem;
        }
        friend-link a {
            color: #d0e0ea;
            margin: 0 8px;
            white-space: nowrap;
        }
        friend-link a:hover {
            color: #f7d44a;
        }
        @media (max-width: 992px) {
            .main-grid {
                grid-template-columns: 1fr;
            }
            .hero h1 {
                font-size: 2.4rem;
            }
            .site-footer .container {
                grid-template-columns: 1fr 1fr;
            }
            .interact-grid {
                grid-template-columns: 1fr;
            }
            .content-area {
                padding: 24px 20px;
            }
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #fff;
                padding: 16px 0 10px;
                border-top: 1px solid #e9edf2;
                margin-top: 12px;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                width: 100%;
                padding: 12px 20px;
                border-radius: 0;
            }
            .flex-row {
                flex-wrap: wrap;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1.1rem;
            }
            .hero {
                padding: 40px 0 36px;
                border-radius: 0 0 32px 32px;
            }
            .site-footer .container {
                grid-template-columns: 1fr;
            }
            .breadcrumb-wrap ol {
                font-size: 0.8rem;
                gap: 4px 8px;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .content-area {
                padding: 18px 14px;
                border-radius: 16px;
            }
            .sidebar-area {
                margin-top: 12px;
            }
            .score-stars {
                font-size: 2rem;
            }
            friend-link {
                font-size: 0.85rem;
            }
            friend-link a {
                display: inline-block;
                margin: 4px 6px;
            }
        }
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero .hero-meta {
                flex-direction: column;
                gap: 8px;
            }
            h2 {
                font-size: 1.5rem;
                padding-left: 12px;
            }
            h3 {
                font-size: 1.2rem;
            }
            .container {
                padding: 0 12px;
            }
            .interact-card {
                padding: 18px 16px;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
        }