*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: #0b0d17;
            color: #e4e7f0;
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: #facc15;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover,
        a:focus {
            color: #ffe66d;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        h1,
        h2,
        h3,
        h4 {
            line-height: 1.3;
            color: #f5f7ff;
            font-weight: 700;
        }
        h1 {
            font-size: 2.4rem;
            margin: 0 0 1rem;
        }
        h2 {
            font-size: 1.8rem;
            margin: 2.5rem 0 1rem;
            border-bottom: 2px solid #facc15;
            padding-bottom: 0.4rem;
        }
        h3 {
            font-size: 1.35rem;
            margin: 1.8rem 0 0.6rem;
            color: #facc15;
        }
        h4 {
            font-size: 1.1rem;
            margin: 1.2rem 0 0.4rem;
            color: #d4d9f0;
        }
        p {
            margin-bottom: 1.2rem;
        }
        .container {
            max-width: 1140px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .site-header {
            background: #151a2b;
            border-bottom: 2px solid #2a2f4b;
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, #facc15, #ff8c00);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: 0 0 30px rgba(250, 204, 21, 0.15);
            transition: transform 0.2s;
        }
        .my-logo:hover {
            transform: scale(1.02);
        }
        .my-logo small {
            font-size: 0.7rem;
            -webkit-text-fill-color: #8892b0;
            display: block;
            font-weight: 400;
            letter-spacing: 0.05em;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid #facc15;
            color: #facc15;
            font-size: 1.6rem;
            padding: 0.3rem 0.7rem;
            border-radius: 6px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(250, 204, 21, 0.1);
        }
        .main-nav {
            display: flex;
            gap: 0.2rem;
            flex-wrap: wrap;
        }
        .main-nav a {
            padding: 0.5rem 1rem;
            border-radius: 6px;
            font-weight: 500;
            font-size: 0.92rem;
            color: #c8cee6;
            transition: background 0.2s, color 0.2s;
        }
        .main-nav a:hover,
        .main-nav a:focus {
            background: #2a2f4b;
            color: #facc15;
            text-decoration: none;
        }
        .main-nav a.active {
            background: #facc15;
            color: #0b0d17;
        }
        .breadcrumb {
            background: #1e243b;
            padding: 0.6rem 1.2rem;
            border-radius: 8px;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
            font-size: 0.85rem;
            margin: 1rem 0 0.5rem;
            list-style: none;
        }
        .breadcrumb li {
            display: inline;
        }
        .breadcrumb li+li::before {
            content: "›";
            color: #8892b0;
            margin-right: 0.4rem;
        }
        .breadcrumb a {
            color: #8892b0;
        }
        .breadcrumb a:hover {
            color: #facc15;
        }
        .breadcrumb li:last-child {
            color: #facc15;
            font-weight: 500;
        }
        .search-form {
            display: flex;
            gap: 0.4rem;
            max-width: 480px;
            margin: 1.5rem 0 2rem;
        }
        .search-form input {
            flex: 1;
            padding: 0.7rem 1rem;
            border: 2px solid #2a2f4b;
            border-radius: 8px;
            background: #1a1f33;
            color: #e4e7f0;
            font-size: 1rem;
            transition: border 0.2s;
        }
        .search-form input:focus {
            outline: none;
            border-color: #facc15;
        }
        .search-form button {
            padding: 0.7rem 1.4rem;
            background: #facc15;
            color: #0b0d17;
            border: none;
            border-radius: 8px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
        }
        .search-form button:hover {
            background: #ffe66d;
            transform: scale(1.02);
        }
        .hero-img-wrap {
            margin: 1.8rem 0 2.5rem;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.7);
            background: #1a1f33;
        }
        .hero-img-wrap img {
            width: 100%;
            max-height: 460px;
            object-fit: cover;
        }
        .content-area {
            background: #111624;
            border-radius: 16px;
            padding: 2rem 2rem 2.5rem;
            margin: 1.5rem 0;
            box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03);
        }
        .content-area strong {
            color: #facc15;
        }
        .content-area em {
            color: #b6c2ff;
            font-style: italic;
        }
        .insight-box {
            background: #1a1f33;
            border-left: 4px solid #facc15;
            padding: 1.2rem 1.5rem;
            border-radius: 0 12px 12px 0;
            margin: 1.6rem 0;
        }
        .insight-box p:last-child {
            margin-bottom: 0;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 1rem;
            margin: 1.6rem 0;
        }
        .stat-card {
            background: #1e243b;
            border-radius: 12px;
            padding: 1.2rem 1rem;
            text-align: center;
            border: 1px solid #2a2f4b;
        }
        .stat-card .num {
            font-size: 2rem;
            font-weight: 800;
            color: #facc15;
        }
        .stat-card .label {
            font-size: 0.85rem;
            color: #8892b0;
            margin-top: 0.2rem;
        }
        .interaction-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin: 2.5rem 0 1rem;
            padding-top: 1.5rem;
            border-top: 2px solid #2a2f4b;
        }
        .interaction-card {
            background: #1a1f33;
            border-radius: 14px;
            padding: 1.6rem 1.8rem;
            border: 1px solid #2a2f4b;
        }
        .interaction-card h3 {
            margin-top: 0;
            font-size: 1.3rem;
        }
        .interaction-card form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
            margin-top: 0.8rem;
        }
        .interaction-card input,
        .interaction-card textarea,
        .interaction-card select {
            padding: 0.65rem 0.9rem;
            border: 2px solid #2a2f4b;
            border-radius: 8px;
            background: #111624;
            color: #e4e7f0;
            font-size: 0.95rem;
            transition: border 0.2s;
        }
        .interaction-card input:focus,
        .interaction-card textarea:focus,
        .interaction-card select:focus {
            outline: none;
            border-color: #facc15;
        }
        .interaction-card textarea {
            min-height: 80px;
            resize: vertical;
        }
        .interaction-card button {
            padding: 0.7rem 1.2rem;
            background: #facc15;
            color: #0b0d17;
            border: none;
            border-radius: 8px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            align-self: flex-start;
        }
        .interaction-card button:hover {
            background: #ffe66d;
            transform: scale(1.02);
        }
        .star-rating {
            display: flex;
            gap: 0.3rem;
            font-size: 1.6rem;
            color: #444a6b;
            cursor: pointer;
            direction: rtl;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            transition: color 0.2s, transform 0.1s;
            cursor: pointer;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: #facc15;
            transform: scale(1.1);
        }
        .star-rating label i {
            pointer-events: none;
        }
        .faq-item {
            background: #1a1f33;
            border-radius: 10px;
            padding: 1rem 1.4rem;
            margin-bottom: 0.8rem;
            border: 1px solid #2a2f4b;
            transition: border 0.2s;
        }
        .faq-item:hover {
            border-color: #facc15;
        }
        .faq-item h4 {
            margin: 0 0 0.4rem;
            font-size: 1.05rem;
            color: #f5f7ff;
        }
        friend-link {
            display: block;
            background: #1e243b;
            border-radius: 12px;
            padding: 1.2rem 1.8rem;
            margin: 2rem 0 1.5rem;
            border: 1px solid #2a2f4b;
            font-size: 0.95rem;
        }
        friend-link a {
            display: inline-block;
            padding: 0.2rem 0.6rem;
            margin: 0.2rem 0.1rem;
            border-radius: 4px;
            background: rgba(250, 204, 21, 0.08);
        }
        friend-link a:hover {
            background: rgba(250, 204, 21, 0.2);
        }
        .site-footer {
            background: #0d0f1a;
            border-top: 2px solid #2a2f4b;
            padding: 2rem 0 1.2rem;
            margin-top: auto;
            text-align: center;
            font-size: 0.9rem;
            color: #6b7294;
        }
        .site-footer .copyright {
            margin-top: 0.8rem;
            border-top: 1px solid #1e243b;
            padding-top: 1rem;
        }
        @media (max-width: 820px) {
            .interaction-section {
                grid-template-columns: 1fr;
            }
            h1 {
                font-size: 1.9rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .content-area {
                padding: 1.4rem 1.2rem;
            }
        }
        @media (max-width: 680px) {
            .nav-toggle {
                display: inline-block;
            }
            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                margin-top: 0.8rem;
                background: #151a2b;
                border-radius: 10px;
                padding: 0.6rem 0;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 0.7rem 1.2rem;
            }
            .header-inner {
                align-items: center;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .my-logo small {
                font-size: 0.6rem;
            }
            h1 {
                font-size: 1.6rem;
            }
            h2 {
                font-size: 1.3rem;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
            }
            .search-form {
                flex-direction: column;
            }
            .breadcrumb {
                font-size: 0.78rem;
                padding: 0.4rem 0.8rem;
            }
        }
        @media (max-width: 420px) {
            .stat-grid {
                grid-template-columns: 1fr;
            }
            .content-area {
                padding: 1rem 0.8rem;
            }
            .interaction-card {
                padding: 1.2rem;
            }
        }
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #0d0f1a;
        }
        ::-webkit-scrollbar-thumb {
            background: #2a2f4b;
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #3d4470;
        }
        .schema-hidden {
            display: none;
        }