/* roulang page: index */
:root {
            --color-primary: #1B4F72;
            --color-secondary: #2E86C1;
            --color-accent: #00E5FF;
            --color-bg: #F4F7FB;
            --color-card: #FFFFFF;
            --color-dark: #0B1D2A;
            --color-text: #1A2B3C;
            --color-text-light: #5B6B7A;
            --color-text-dark-bg: #C5D3DE;
            --color-border: #E1E8F0;
            --color-success: #27AE60;
            --color-error: #E74C3C;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-input: 6px;
            --shadow-card: 0 2px 8px rgba(11, 29, 42, 0.06);
            --shadow-card-hover: 0 12px 28px rgba(11, 29, 42, 0.12);
            --space-sm: 16px;
            --space-md: 32px;
            --space-lg: 64px;
            --space-xl: 80px;
            --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --transition-base: all 0.3s ease;
        }

        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-main);
            background-color: var(--color-bg);
            color: var(--color-text);
            line-height: 1.8;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--color-secondary);
            text-decoration: none;
            transition: var(--transition-base);
        }

        a:hover {
            color: var(--color-primary);
        }

        button, input, select, textarea {
            font-family: var(--font-main);
            font-size: 16px;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ---------- 顶部导航 暗色霓虹风 ---------- */
        .site-header {
            background-color: var(--color-dark);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 1px solid rgba(0, 229, 255, 0.3);
            box-shadow: 0 1px 20px rgba(0, 229, 255, 0.08);
        }

        .site-header::after {
            content: '';
            display: block;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
            position: absolute;
            bottom: -1px;
            left: 0;
            right: 0;
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: 0.5px;
            text-shadow: 0 0 12px rgba(0, 229, 255, 0.6);
            transition: var(--transition-base);
        }

        .nav-logo:hover {
            color: var(--color-accent);
            text-shadow: 0 0 18px rgba(0, 229, 255, 0.9);
        }

        .logo-mark {
            width: 16px;
            height: 16px;
            background: linear-gradient(135deg, var(--color-accent), var(--color-secondary));
            border-radius: 4px;
            display: inline-block;
            flex-shrink: 0;
            box-shadow: 0 0 8px rgba(0, 229, 255, 0.5);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin: 0;
        }

        .nav__item {
            position: relative;
        }

        .nav__link {
            display: block;
            color: #9FB3C8;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            border-bottom: 2px solid transparent;
            transition: var(--transition-base);
            line-height: 1.4;
        }

        .nav__link:hover,
        .nav__link:focus {
            color: #FFFFFF;
            border-bottom-color: rgba(0, 229, 255, 0.5);
            outline: none;
        }

        .nav__link--active {
            color: var(--color-accent);
            border-bottom-color: var(--color-accent);
            text-shadow: 0 0 10px rgba(0, 229, 255, 0.5);
        }

        .nav__link--active:hover {
            color: var(--color-accent);
            border-bottom-color: var(--color-accent);
        }

        .nav-cta {
            margin-left: 8px;
        }

        .btn {
            display: inline-block;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            text-align: center;
            cursor: pointer;
            transition: var(--transition-base);
            border: none;
            line-height: 1.4;
            text-decoration: none;
        }

        .btn:focus {
            outline: 3px solid rgba(0, 229, 255, 0.4);
            outline-offset: 2px;
        }

        .btn--primary {
            background-color: var(--color-accent);
            color: var(--color-dark);
        }

        .btn--primary:hover, .btn--primary:focus {
            background-color: #33EAFF;
            color: var(--color-dark);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.4);
            transform: translateY(-1px);
        }

        .btn--primary:active {
            transform: translateY(1px);
            box-shadow: 0 0 10px rgba(0, 229, 255, 0.2);
        }

        .btn--secondary {
            background-color: transparent;
            border: 1px solid var(--color-secondary);
            color: var(--color-secondary);
        }

        .btn--secondary:hover, .btn--secondary:focus {
            background-color: rgba(46, 134, 193, 0.08);
            color: var(--color-primary);
            border-color: var(--color-primary);
        }

        .btn--secondary:active {
            background-color: rgba(46, 134, 193, 0.15);
        }

        .btn--light {
            background-color: transparent;
            border: 1px solid rgba(255, 255, 255, 0.6);
            color: #FFFFFF;
        }

        .btn--light:hover, .btn--light:focus {
            background-color: rgba(255, 255, 255, 0.08);
            color: var(--color-accent);
            border-color: var(--color-accent);
        }

        .btn--light:active {
            background-color: rgba(255, 255, 255, 0.15);
        }

        .btn--block {
            display: block;
            width: 100%;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            width: 40px;
            height: 40px;
            cursor: pointer;
            position: relative;
            z-index: 1002;
        }

        .nav-toggle__line {
            display: block;
            width: 24px;
            height: 2px;
            background-color: #FFFFFF;
            margin: 5px auto;
            transition: var(--transition-base);
        }

        .nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ---------- Hero 首屏 ---------- */
        .hero {
            background: linear-gradient(135deg, #F4F7FB 0%, #E8F0F8 60%, #DCE9F5 100%);
            padding: var(--space-xl) 0;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 229, 255, 0.1) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(46, 134, 193, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero__inner {
            display: flex;
            align-items: center;
            gap: 60px;
        }

        .hero__content {
            flex: 1;
        }

        .hero__badge {
            display: inline-block;
            background-color: rgba(27, 79, 114, 0.08);
            color: var(--color-primary);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 24px;
        }

        .hero__title {
            font-size: 44px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-primary);
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }

        .hero__subtitle {
            font-size: 18px;
            color: var(--color-text-light);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 560px;
        }

        .hero__actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 32px;
        }

        .hero__trust {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            padding-top: 20px;
            border-top: 1px solid rgba(27, 79, 114, 0.1);
        }

        .hero__trust-item {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            color: var(--color-text-light);
        }

        .hero__trust-item svg {
            width: 16px;
            height: 16px;
            color: var(--color-success);
        }

        .hero__visual {
            flex: 1;
            position: relative;
        }

        .hero__image {
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card-hover);
            position: relative;
            z-index: 2;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            min-height: 420px;
            display: flex;
            align-items: flex-end;
            padding: 24px;
        }

        .hero__image-overlay {
            background: linear-gradient(0deg, rgba(11, 29, 42, 0.7) 0%, transparent 100%);
            border-radius: var(--radius-card);
            padding: 20px;
            color: #FFFFFF;
            width: 100%;
        }

        .hero__image-overlay span {
            font-size: 14px;
            color: var(--color-accent);
            display: block;
            margin-bottom: 4px;
        }

        .hero__image-overlay strong {
            font-size: 18px;
            font-weight: 600;
        }

        /* ---------- 板块通用 ---------- */
        .section {
            padding: var(--space-lg) 0;
        }

        .section--white {
            background-color: var(--color-card);
        }

        .section--dark {
            background-color: var(--color-dark);
        }

        .section--light {
            background-color: #EDF3FA;
        }

        .section__header {
            margin-bottom: var(--space-md);
            text-align: center;
        }

        .section__title {
            font-size: 32px;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .section__subtitle {
            font-size: 16px;
            color: var(--color-text-light);
            max-width: 720px;
            margin: 0 auto;
        }

        /* ---------- 方案卡片区 ---------- */
        .solution-card--featured {
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 32px;
            display: flex;
            gap: 32px;
            align-items: center;
            transition: var(--transition-base);
            margin-bottom: 24px;
            border: 1px solid var(--color-border);
        }

        .solution-card--featured:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }

        .solution-card__icon {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            background: linear-gradient(135deg, rgba(0, 229, 255, 0.15), rgba(46, 134, 193, 0.1));
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            color: var(--color-primary);
        }

        .solution-card__icon svg {
            width: 32px;
            height: 32px;
        }

        .solution-card__body {
            flex: 1;
        }

        .solution-card__title {
            font-size: 20px;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 8px;
        }

        .solution-card__desc {
            color: var(--color-text-light);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 12px;
        }

        .solution-card__link {
            color: var(--color-secondary);
            font-weight: 500;
            font-size: 15px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: var(--transition-base);
        }

        .solution-card__link:hover {
            color: var(--color-primary);
            gap: 8px;
        }

        .solution-card {
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px;
            transition: var(--transition-base);
            border: 1px solid var(--color-border);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .solution-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }

        .solution-card .solution-card__icon {
            margin-bottom: 16px;
        }

        .solution-card .solution-card__title {
            font-size: 18px;
            margin-bottom: 10px;
        }

        .solution-card .solution-card__desc {
            margin-bottom: 16px;
            flex-grow: 1;
        }

        /* ---------- 数据横幅 ---------- */
        .stats-banner {
            background-color: var(--color-dark);
            padding: var(--space-lg) 0;
            border-top: 1px solid rgba(0, 229, 255, 0.2);
            border-bottom: 1px solid rgba(0, 229, 255, 0.2);
            position: relative;
        }

        .stats-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
        }

        .stats-banner__grid {
            display: flex;
            align-items: center;
            gap: 40px;
        }

        .stats-banner__numbers {
            display: flex;
            gap: 60px;
            flex-wrap: wrap;
            flex: 1;
        }

        .stats-item {
            text-align: center;
        }

        .stats-item__number {
            font-size: 48px;
            font-weight: 700;
            color: var(--color-accent);
            text-shadow: 0 0 20px rgba(0, 229, 255, 0.3);
            margin-bottom: 4px;
            line-height: 1.2;
        }

        .stats-item__label {
            font-size: 16px;
            color: #FFFFFF;
            font-weight: 500;
            margin-bottom: 4px;
        }

        .stats-item__desc {
            font-size: 13px;
            color: var(--color-text-dark-bg);
        }

        .stats-banner__visual {
            flex: 0 0 300px;
        }

        .stats-banner__image {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: 0 0 30px rgba(0, 229, 255, 0.15);
        }

        /* ---------- CTA 触发区 ---------- */
        .cta-trigger {
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            padding: 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            flex-wrap: wrap;
        }

        .cta-trigger__content h3 {
            font-size: 24px;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 8px;
        }

        .cta-trigger__content p {
            color: var(--color-text-light);
            max-width: 520px;
        }

        /* ---------- 隐私说明 ---------- */
        .privacy-item {
            background-color: transparent;
            border: none;
            padding: 20px;
            text-align: center;
        }

        .privacy-item__icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background-color: rgba(46, 134, 193, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            color: var(--color-secondary);
        }

        .privacy-item__icon svg {
            width: 28px;
            height: 28px;
        }

        .privacy-item__title {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 6px;
        }

        .privacy-item__desc {
            color: var(--color-text-light);
            font-size: 14px;
        }

        /* ---------- 资讯列表 ---------- */
        .news-list {
            display: grid;
            gap: 24px;
        }

        .news-card {
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 24px;
            display: flex;
            gap: 20px;
            transition: var(--transition-base);
            border: 1px solid var(--color-border);
            cursor: pointer;
            position: relative;
        }

        .news-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .news-card__thumb {
            width: 120px;
            height: 90px;
            border-radius: 8px;
            background-color: #E8EFF5;
            background-size: cover;
            background-position: center;
            flex-shrink: 0;
            position: relative;
            overflow: hidden;
        }

        .news-card__thumb--empty {
            display: flex;
            align-items: center;
            justify-content: center;
            color: #A0B3C4;
            font-size: 12px;
        }

        .news-card__body {
            flex: 1;
        }

        .news-card__meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 6px;
        }

        .badge {
            display: inline-block;
            padding: 3px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 500;
            background-color: rgba(46, 134, 193, 0.1);
            color: var(--color-secondary);
        }

        .news-card__date {
            font-size: 13px;
            color: var(--color-text-light);
        }

        .news-card__title {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 6px;
            line-height: 1.5;
        }

        .news-card__excerpt {
            color: var(--color-text-light);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card__link {
            font-size: 14px;
            color: var(--color-secondary);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: var(--transition-base);
        }

        .news-card__link:hover {
            gap: 8px;
            color: var(--color-primary);
        }

        .news-btn-wrap {
            text-align: center;
            margin-top: 40px;
        }

        /* ---------- FAQ ---------- */
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
        }

        .accordion-item {
            background-color: var(--color-card);
            border: 1px solid var(--color-border) !important;
            border-radius: var(--radius-card) !important;
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition-base);
            position: relative;
        }

        .accordion-item:hover,
        .accordion-item.is-active {
            border-color: var(--color-accent) !important;
            box-shadow: 0 4px 16px rgba(0, 229, 255, 0.08);
        }

        .accordion-item:hover::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--color-accent);
            z-index: 1;
        }

        .accordion-item.is-active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--color-accent);
            z-index: 1;
        }

        .accordion-title {
            font-size: 16px !important;
            font-weight: 600 !important;
            color: var(--color-primary) !important;
            padding: 20px 24px !important;
            line-height: 1.5 !important;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .accordion-title::before {
            content: '+';
            font-size: 20px;
            color: var(--color-secondary);
            order: 2;
            transition: var(--transition-base);
            flex-shrink: 0;
        }

        .accordion-item.is-active .accordion-title::before {
            content: '−';
            color: var(--color-accent);
        }

        .accordion-title:hover,
        .accordion-title:focus {
            background-color: #F8FBFF !important;
            color: var(--color-secondary) !important;
        }

        .accordion-content {
            padding: 0 24px 20px !important;
            color: var(--color-text-light);
            line-height: 1.8;
            border-top: 1px solid var(--color-border);
        }

        /* ---------- 表单弹层 ---------- */
        .reveal-modal {
            border-radius: var(--radius-card);
            border: none;
            padding: 0;
            max-width: 520px;
            background-color: var(--color-card);
            overflow: hidden;
            box-shadow: 0 24px 64px rgba(11, 29, 42, 0.2);
        }

        .reveal-modal::before {
            content: '';
            display: block;
            height: 4px;
            background: linear-gradient(90deg, var(--color-accent), var(--color-secondary));
        }

        .form-modal__content {
            padding: 40px;
        }

        .form-modal__title {
            font-size: 24px;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 8px;
        }

        .form-modal__subtitle {
            color: var(--color-text-light);
            font-size: 14px;
            margin-bottom: 24px;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text);
            margin-bottom: 6px;
        }

        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            height: 42px;
            border: 1px solid #D5DCE4;
            border-radius: var(--radius-input);
            padding: 8px 14px;
            font-size: 15px;
            color: var(--color-text);
            transition: var(--transition-base);
            background-color: #FFFFFF;
        }

        .form-group textarea {
            height: auto;
            min-height: 90px;
            resize: vertical;
        }

        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: var(--color-secondary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(46, 134, 193, 0.12);
        }

        .form-group input.error,
        .form-group textarea.error {
            border-color: var(--color-error);
        }

        .close-button {
            color: var(--color-text-light) !important;
            transition: var(--transition-base);
        }

        .close-button:hover {
            color: var(--color-primary) !important;
            transform: rotate(90deg);
        }

        /* ---------- 页脚 ---------- */
        .site-footer {
            background-color: var(--color-dark);
            color: var(--color-text-dark-bg);
            padding-top: var(--space-lg);
            border-top: 1px solid rgba(0, 229, 255, 0.3);
            position: relative;
        }

        .site-footer::before {
            content: '';
            position: absolute;
            top: -1px;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px;
            margin-bottom: var(--space-md);
        }

        .footer-brand {
            max-width: 320px;
        }

        .footer-logo {
            font-size: 22px;
            font-weight: 700;
            color: #FFFFFF;
            text-shadow: 0 0 12px rgba(0, 229, 255, 0.4);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-logo .logo-mark {
            width: 14px;
            height: 14px;
        }

        .footer-brand__desc {
            font-size: 14px;
            color: var(--color-text-dark-bg);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .footer-col__title {
            font-size: 16px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 16px;
        }

        .footer-links {
            list-style: none;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: var(--color-text-dark-bg);
            font-size: 14px;
            transition: var(--transition-base);
        }

        .footer-links a:hover,
        .footer-links a:focus {
            color: var(--color-accent);
            outline: none;
        }

        .footer-contact {
            list-style: none;
            margin: 0;
        }

        .footer-contact li {
            margin-bottom: 10px;
            font-size: 14px;
            color: var(--color-text-dark-bg);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px 0;
            font-size: 13px;
            color: #7A8C9A;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
        }

        /* ---------- 响应式 ---------- */
        @media (max-width: 1024px) {
            :root {
                --space-lg: 56px;
                --space-xl: 64px;
            }

            .hero__inner {
                gap: 40px;
            }

            .hero__title {
                font-size: 38px;
            }

            .stats-banner__grid {
                flex-direction: column;
                gap: 32px;
            }

            .stats-banner__visual {
                flex: 1;
                min-width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --space-lg: 48px;
                --space-xl: 48px;
            }

            .nav-toggle {
                display: block;
            }

            .nav-menu {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background-color: var(--color-dark);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px 24px;
                gap: 4px;
                transform: translateY(-10px);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition-base);
                border-bottom: 1px solid rgba(0, 229, 255, 0.3);
                z-index: 1001;
                box-shadow: 0 20px 40px rgba(11, 29, 42, 0.3);
            }

            .nav-menu.is-open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }

            .nav__link {
                padding: 14px 16px;
                font-size: 16px;
                border-bottom: none;
                border-left: 2px solid transparent;
            }

            .nav__link:hover,
            .nav__link--active {
                border-left-color: var(--color-accent);
                border-bottom-color: transparent;
            }

            .nav-cta {
                margin-left: 0;
                margin-top: 8px;
            }

            .nav-cta .btn {
                width: 100%;
            }

            .hero__inner {
                flex-direction: column;
                gap: 32px;
            }

            .hero__title {
                font-size: 32px;
            }

            .hero__subtitle {
                font-size: 16px;
            }

            .hero__actions {
                flex-direction: column;
                align-items: stretch;
            }

            .hero__actions .btn {
                width: 100%;
                text-align: center;
            }

            .hero__image {
                min-height: 300px;
            }

            .section__title {
                font-size: 28px;
            }

            .solution-card--featured {
                flex-direction: column;
                text-align: center;
                padding: 24px;
                gap: 16px;
            }

            .solution-card--featured .solution-card__body {
                text-align: center;
            }

            .stats-banner__numbers {
                gap: 32px;
                justify-content: center;
            }

            .stats-item__number {
                font-size: 36px;
            }

            .cta-trigger {
                flex-direction: column;
                text-align: center;
                padding: 32px 24px;
                gap: 20px;
            }

            .cta-trigger__content p {
                margin: 0 auto;
            }

            .news-card {
                flex-direction: row;
                padding: 20px;
            }

            .news-card__thumb {
                width: 100px;
                height: 80px;
            }

            .news-card__title {
                font-size: 16px;
            }

            .news-card__excerpt {
                -webkit-line-clamp: 2;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .form-modal__content {
                padding: 32px 24px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --space-lg: 40px;
                --space-md: 24px;
            }

            .hero {
                padding: var(--space-lg) 0;
            }

            .hero__title {
                font-size: 28px;
            }

            .hero__image {
                min-height: 240px;
            }

            .section__title {
                font-size: 24px;
            }

            .stats-banner__numbers {
                flex-direction: column;
                gap: 24px;
            }

            .news-card {
                flex-direction: column;
                padding: 16px;
            }

            .news-card__thumb {
                width: 100%;
                height: 140px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }

            .reveal-modal {
                margin: 0;
                width: 100%;
                min-height: 100vh;
                top: 0 !important;
                left: 0 !important;
                max-width: none;
                border-radius: 0;
                transform: none !important;
            }
        }

        /* ---------- 滚动动画 ---------- */
        .reveal-effect {
            opacity: 0;
            transform: translateY(24px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .reveal-effect.is-visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ---------- 无障碍 ---------- */
        .skip-link {
            position: absolute;
            top: -40px;
            left: 16px;
            background: var(--color-accent);
            color: var(--color-dark);
            padding: 8px 16px;
            z-index: 10000;
            border-radius: 4px;
            font-weight: 600;
            transition: top 0.2s ease;
        }

        .skip-link:focus {
            top: 8px;
        }

/* roulang page: category1 */
:root {
  --color-primary: #1B4F72;
  --color-secondary: #2E86C1;
  --color-accent: #00E5FF;
  --color-bg: #F4F7FB;
  --color-card: #FFFFFF;
  --color-dark: #0B1D2A;
  --color-text: #1A2B3C;
  --color-text-weak: #5B6B7A;
  --color-border: #E1E8F0;
  --color-success: #27AE60;
  --color-error: #E74C3C;
  --radius-card: 12px;
  --radius-btn: 8px;
  --shadow-card: 0 2px 8px rgba(11,29,42,0.06);
  --shadow-card-hover: 0 12px 28px rgba(11,29,42,0.12);
  --space-section: 80px;
  --space-section-mobile: 40px;
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-secondary); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--color-primary); }
ul, ol { margin: 0; padding: 0; }
button { font-family: inherit; cursor: pointer; }
input, textarea { font-family: inherit; }
.container-custom {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: var(--space-section) 0;
}
.section--white { background: var(--color-card); }
.section--light { background: var(--color-bg); }
.section__title {
  font-size: 32px;
  font-weight: 600;
  color: var(--color-primary);
  margin: 0 0 12px;
  line-height: 1.35;
}
.section__lead {
  font-size: 16px;
  color: var(--color-text-weak);
  max-width: 680px;
  margin: 0 0 40px;
  line-height: 1.8;
}
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-dark);
  min-height: 64px;
  display: flex;
  align-items: center;
  box-shadow: 0 4px 20px rgba(0,0,0,.25);
}
.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  opacity: .8;
}
.nav-container {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 64px;
  position: relative;
}
.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  letter-spacing: .5px;
  text-shadow: 0 0 12px rgba(0,229,255,.6);
  flex-shrink: 0;
}
.nav-logo:hover { color: var(--color-accent); }
.logo-mark {
  width: 16px;
  height: 16px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-secondary));
  border-radius: 4px;
  display: inline-block;
  box-shadow: 0 0 10px rgba(0,229,255,.5);
}
.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  padding: 10px;
  flex-direction: column;
  gap: 5px;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
}
.nav-toggle__line {
  width: 22px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform .25s ease, opacity .25s ease;
}
.nav-toggle:hover .nav-toggle__line,
.nav-toggle:focus .nav-toggle__line { background: var(--color-accent); }
.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.nav-menu ul.nav-menu {
  display: flex !important;
  align-items: center;
  gap: 8px !important;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav__item { position: relative; }
.nav__link {
  display: block;
  padding: 22px 14px 20px;
  color: #9FB3C8;
  font-size: 15px;
  font-weight: 500;
  border-bottom: 2px solid transparent;
  transition: color .2s ease, border-color .2s ease, text-shadow .2s ease;
}
.nav__link:hover {
  color: #fff;
  border-bottom-color: var(--color-accent);
}
.nav__link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: -2px;
  border-radius: 4px;
}
.nav__link--active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
  text-shadow: 0 0 8px rgba(0,229,255,.5);
}
.nav-cta { margin-left: 8px; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  border-radius: var(--radius-btn);
  border: 1px solid transparent;
  transition: all .2s ease;
  text-decoration: none;
  cursor: pointer;
}
.btn--primary {
  background: var(--color-accent);
  color: var(--color-dark);
  border-color: var(--color-accent);
}
.btn--primary:hover {
  background: #33EAFF;
  border-color: #33EAFF;
  color: var(--color-dark);
  box-shadow: 0 0 20px rgba(0,229,255,.4);
  transform: translateY(-1px);
}
.btn--primary:active {
  transform: translateY(1px);
  box-shadow: 0 0 8px rgba(0,229,255,.2);
}
.btn--primary:focus-visible,
.btn--secondary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}
.btn--secondary {
  background: transparent;
  border: 1px solid var(--color-secondary);
  color: var(--color-secondary);
}
.btn--secondary:hover {
  background: rgba(46,134,193,.08);
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn--secondary:active {
  background: rgba(46,134,193,.16);
  transform: translateY(1px);
}
.btn--light {
  background: transparent;
  border: 1px solid rgba(255,255,255,.7);
  color: #fff;
}
.btn--light:hover {
  background: rgba(255,255,255,.08);
  border-color: #fff;
  color: var(--color-accent);
}
.btn--light:active {
  background: rgba(255,255,255,.16);
  transform: translateY(1px);
}
.btn--block { width: 100%; }

/* ===== Breadcrumb ===== */
.breadcrumb-wrap {
  background: var(--color-card);
  border-bottom: 1px solid var(--color-border);
  padding: 12px 0;
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--color-text-weak);
  margin: 0;
  padding: 0;
  list-style: none;
}
.breadcrumb li { display: inline-flex; align-items: center; gap: 6px; }
.breadcrumb li + li::before { content: "/"; color: #B0BEC5; }
.breadcrumb a { color: var(--color-secondary); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb .is-active { color: var(--color-primary); font-weight: 500; }

/* ===== Page Hero ===== */
.page-hero {
  position: relative;
  padding: 90px 0;
  background: linear-gradient(120deg, #0b1d2a 0%, #12344d 45%, #1b4f72 100%);
  overflow: hidden;
  color: #fff;
}
.page-hero__bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  opacity: .18;
  pointer-events: none;
}
.page-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 20%, rgba(0,229,255,.12), transparent 60%);
}
.page-hero .container-custom { position: relative; z-index: 2; }
.page-hero__eyebrow {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 20px;
  background: rgba(0,229,255,.12);
  border: 1px solid rgba(0,229,255,.3);
  color: var(--color-accent);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 22px;
}
.page-hero__title {
  font-size: 44px;
  font-weight: 700;
  line-height: 1.25;
  margin: 0 0 18px;
  max-width: 720px;
}
.page-hero__subtitle {
  font-size: 17px;
  line-height: 1.8;
  color: #C5D3DE;
  max-width: 620px;
  margin: 0 0 32px;
}
.page-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 36px;
}
.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 28px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 14px;
  color: #9FB3C8;
}
.hero-trust li { display: inline-flex; align-items: center; gap: 8px; }
.hero-trust li::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(0,229,255,.7);
}

/* ===== Intro Split ===== */
.intro-split {
  padding: var(--space-section) 0;
}
.intro-split .grid-x { align-items: center; gap: 40px; }
.intro-split__media {
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  position: relative;
  background: var(--color-border);
}
.intro-split__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 320px;
  transition: transform .5s ease;
}
.intro-split__media:hover img { transform: scale(1.03); }
.intro-split__content { padding: 0 10px; }
.intro-split__title {
  font-size: 30px;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.4;
  margin: 0 0 16px;
}
.intro-split__text { color: var(--color-text-weak); margin: 0 0 18px; line-height: 1.85; }
.intro-split__list {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
}
.intro-split__list li {
  position: relative;
  padding-left: 26px;
  margin-bottom: 10px;
  font-size: 15px;
  color: var(--color-text);
}
.intro-split__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 12px;
  height: 12px;
  background: var(--color-secondary);
  border-radius: 3px;
  opacity: .85;
}

/* ===== Content Blocks ===== */
.content-block {
  padding: var(--space-section) 0;
  background: var(--color-card);
}
.content-block__title {
  font-size: 32px;
  font-weight: 600;
  color: var(--color-primary);
  margin: 0 0 40px;
  text-align: center;
}
.content-block--wide {
  background: var(--color-bg);
  border-radius: var(--radius-card);
  overflow: hidden;
  margin-bottom: 28px;
  border: 1px solid var(--color-border);
}
.content-block--wide .grid-x { align-items: center; }
.content-block--wide__content { padding: 36px 40px; }
.content-block--wide__title {
  font-size: 24px;
  font-weight: 600;
  color: var(--color-primary);
  margin: 0 0 12px;
}
.content-block--wide__text { color: var(--color-text-weak); margin: 0; }
.content-block--wide__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 260px;
}
.content-block--half {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: box-shadow .25s ease, transform .25s ease;
}
.content-block--half:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}
.content-block--half__media {
  height: 180px;
  overflow: hidden;
}
.content-block--half__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.content-block--half__body { padding: 28px; }
.content-block--half__title {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-primary);
  margin: 0 0 10px;
}
.content-block--half__text { color: var(--color-text-weak); margin: 0; font-size: 15px; }

/* ===== Sub Service Cards ===== */
.service-cards-section { padding: var(--space-section) 0; }
.service-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: box-shadow .25s ease, transform .25s ease;
}
.service-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}
.service-card__media {
  height: 150px;
  overflow: hidden;
  position: relative;
}
.service-card__media img { width: 100%; height: 100%; object-fit: cover; }
.service-card__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11,29,42,0) 55%, rgba(11,29,42,.35));
}
.service-card__body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.service-card__tag {
  display: inline-block;
  align-self: flex-start;
  background: rgba(46,134,193,.1);
  color: var(--color-secondary);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 12px;
}
.service-card__title {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-primary);
  margin: 0 0 10px;
}
.service-card__text {
  color: var(--color-text-weak);
  font-size: 14px;
  line-height: 1.75;
  margin: 0 0 20px;
  flex: 1;
}
.service-card__link {
  font-weight: 600;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap .2s ease, color .2s ease;
}
.service-card__link:hover { gap: 9px; color: var(--color-primary); }
.service-card__link::after {
  content: "→";
  font-size: 16px;
  line-height: 1;
}

/* ===== Data Band ===== */
.data-band {
  background: var(--color-dark);
  color: #fff;
  padding: var(--space-section) 0;
  position: relative;
  overflow: hidden;
}
.data-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 0%, rgba(0,229,255,.1), transparent 50%);
}
.data-band .container-custom { position: relative; z-index: 2; }
.data-band__title {
  font-size: 30px;
  font-weight: 600;
  color: #fff;
  margin: 0 0 10px;
}
.data-band__lead { color: #C5D3DE; margin: 0 0 44px; font-size: 15px; }
.data-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.data-item { text-align: center; }
.data-item__number {
  font-size: 48px;
  font-weight: 700;
  color: var(--color-accent);
  text-shadow: 0 0 18px rgba(0,229,255,.35);
  line-height: 1.2;
  margin-bottom: 8px;
}
.data-item__label {
  font-size: 16px;
  color: #fff;
  font-weight: 600;
  margin-bottom: 6px;
}
.data-item__desc {
  font-size: 13px;
  color: #9FB3C8;
  line-height: 1.6;
}

/* ===== FAQ ===== */
.faq-section { padding: var(--space-section) 0; }
.accordion-item {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  margin-bottom: 10px;
  overflow: hidden;
  transition: border-color .2s ease, box-shadow .2s ease;
  position: relative;
}
.accordion-item:hover {
  border-left: 2px solid var(--color-accent);
  box-shadow: var(--shadow-card);
}
.accordion-item:focus-within {
  border-left: 2px solid var(--color-accent);
  box-shadow: var(--shadow-card-hover);
}
.accordion-title {
  width: 100%;
  background: transparent;
  border: 0;
  text-align: left;
  padding: 20px 56px 20px 22px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  position: relative;
  line-height: 1.5;
}
.accordion-title::after {
  content: "+";
  position: absolute;
  right: 22px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  color: var(--color-secondary);
  transition: transform .25s ease, color .2s ease;
}
.accordion-item.is-active .accordion-title { color: var(--color-secondary); }
.accordion-item.is-active .accordion-title::after {
  content: "−";
  color: var(--color-accent);
}
.accordion-content {
  display: none;
  padding: 0 22px 20px;
  color: var(--color-text-weak);
  font-size: 15px;
  line-height: 1.8;
}
.accordion-item.is-active .accordion-content { display: block; }

/* ===== CTA ===== */
.cta-section {
  padding: 70px 0;
  background: linear-gradient(120deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 180px;
  height: 180px;
  background: rgba(0,229,255,.15);
  border-radius: 50%;
  filter: blur(20px);
}
.cta-section::after {
  content: "";
  position: absolute;
  bottom: -80px;
  left: -40px;
  width: 140px;
  height: 140px;
  background: rgba(0,229,255,.1);
  border-radius: 50%;
}
.cta-section__title {
  font-size: 30px;
  font-weight: 600;
  margin: 0 0 14px;
  color: #fff;
}
.cta-section__text {
  color: rgba(255,255,255,.85);
  max-width: 620px;
  margin: 0 auto 32px;
  font-size: 16px;
  line-height: 1.8;
}
.cta-section .btn { position: relative; z-index: 2; }

/* ===== Footer ===== */
.site-footer {
  background: var(--color-dark);
  color: #C5D3DE;
  padding-top: 60px;
  position: relative;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  text-shadow: 0 0 12px rgba(0,229,255,.5);
  margin-bottom: 16px;
}
.footer-brand__desc {
  color: #9FB3C8;
  font-size: 14px;
  line-height: 1.8;
  margin: 0;
  max-width: 300px;
}
.footer-col__title {
  font-size: 15px;
  color: #fff;
  font-weight: 600;
  margin: 0 0 16px;
  letter-spacing: .5px;
}
.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer-links li { margin-bottom: 10px; }
.footer-links a {
  color: #9FB3C8;
  font-size: 14px;
  transition: color .2s ease, padding-left .2s ease;
}
.footer-links a:hover { color: var(--color-accent); padding-left: 4px; }
.footer-contact {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 14px;
  color: #9FB3C8;
}
.footer-contact li { margin-bottom: 10px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 20px 0 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  font-size: 13px;
  color: #748A9C;
}

/* ===== Reveal Modal ===== */
.contact-modal {
  max-width: 520px !important;
  background: var(--color-card);
  border-radius: 14px;
  padding: 40px 36px 32px;
  position: relative;
  border: 0;
  overflow: hidden;
}
.contact-modal::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-secondary), var(--color-accent));
}
.contact-modal__title {
  font-size: 24px;
  font-weight: 600;
  color: var(--color-primary);
  margin: 0 0 8px;
}
.contact-modal__subtitle {
  font-size: 14px;
  color: var(--color-text-weak);
  margin: 0 0 28px;
  line-height: 1.7;
}
.contact-modal .close-button {
  position: absolute;
  top: 14px;
  right: 18px;
  font-size: 28px;
  color: var(--color-text-weak);
  background: transparent;
  border: 0;
  line-height: 1;
  transition: color .2s ease, transform .2s ease;
}
.contact-modal .close-button:hover { color: var(--color-primary); transform: rotate(90deg); }
.contact-form label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 18px;
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  margin-top: 6px;
  height: 42px;
  border: 1px solid #D5DCE4;
  border-radius: 6px;
  padding: 0 14px;
  font-size: 14px;
  color: var(--color-text);
  background: #FAFCFE;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.contact-form textarea { height: auto; padding: 12px 14px; resize: vertical; }
.contact-form input:focus,
.contact-form textarea:focus {
  outline: 0;
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(46,134,193,.12);
}
.contact-form .btn { margin-top: 6px; }
.reveal-overlay {
  background: rgba(11,29,42,.6);
  backdrop-filter: blur(4px);
}
.reveal {
  animation: modal-in .2s ease;
}
@keyframes modal-in {
  from { opacity: 0; transform: scale(.96) translateY(8px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .page-hero { padding: 70px 0; }
  .page-hero__title { font-size: 36px; }
  .content-block--wide__content { padding: 28px 24px; }
  .data-grid { gap: 24px; }
  .data-item__number { font-size: 38px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  nav.nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-dark);
    padding: 18px 24px 24px;
    border-top: 1px solid rgba(0,229,255,.2);
    box-shadow: 0 12px 30px rgba(0,0,0,.3);
  }
  nav.nav-menu.is-open { display: block; animation: fade-in .2s ease; }
  @keyframes fade-in {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
  }
  nav.nav-menu ul.nav-menu {
    flex-direction: column !important;
    align-items: stretch !important;
    width: 100%;
    gap: 0 !important;
  }
  .nav__link {
    padding: 14px 0;
    border-bottom: 1px solid rgba(255,255,255,.06);
    font-size: 15px;
  }
  .nav__link--active {
    border-bottom-color: var(--color-accent);
    color: var(--color-accent);
  }
  .nav-cta { margin: 16px 0 0; }
  .nav-cta .btn { width: 100%; }
  .section { padding: var(--space-section-mobile) 0; }
  .page-hero__title { font-size: 28px; }
  .page-hero__subtitle { font-size: 15px; }
  .section__title { font-size: 26px; }
  .content-block__title { font-size: 26px; margin-bottom: 28px; }
  .intro-split__title { font-size: 24px; }
  .data-grid { grid-template-columns: repeat(2, 1fr); gap: 32px 20px; }
  .data-item__number { font-size: 34px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; }
  .contact-modal { padding: 32px 24px 28px; }
  .cta-section { padding: 52px 0; }
  .cta-section__title { font-size: 24px; }
}
@media (max-width: 520px) {
  .container-custom { padding: 0 16px; }
  .page-hero { padding: 56px 0; }
  .page-hero__title { font-size: 26px; }
  .page-hero__actions { flex-direction: column; }
  .page-hero__actions .btn { width: 100%; }
  .hero-trust { gap: 8px 16px; font-size: 13px; }
  .intro-split__media img { min-height: 220px; }
  .content-block--half__media { height: 150px; }
  .data-band__lead { margin-bottom: 30px; }
  .data-item__number { font-size: 30px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom span { font-size: 12px; }
}

/* roulang page: article */
:root {
            --color-primary: #1B4F72;
            --color-primary-2: #2E86C1;
            --color-accent: #00E5FF;
            --color-bg: #F4F7FB;
            --color-card: #FFFFFF;
            --color-dark: #0B1D2A;
            --color-text: #1A2B3C;
            --color-text-sub: #5B6B7A;
            --color-text-dark: #C5D3DE;
            --color-border: #E1E8F0;
            --color-success: #27AE60;
            --color-error: #E74C3C;
            --radius-sm: 6px;
            --radius-card: 12px;
            --radius-pill: 20px;
            --shadow-sm: 0 2px 8px rgba(11, 29, 42, 0.06);
            --shadow-md: 0 12px 28px rgba(11, 29, 42, 0.12);
            --space-sm: 16px;
            --space-md: 24px;
            --space-lg: 48px;
            --space-xl: 72px;
            --container-max: 1200px;
            --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
        }

        *, *::before, *::after { box-sizing: border-box; }

        html { scroll-behavior: smooth; }

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }

        img { max-width: 100%; display: inline-block; vertical-align: middle; }
        a { color: var(--color-primary-2); text-decoration: none; transition: color 0.2s ease, opacity 0.2s ease; }
        a:hover { color: var(--color-primary); }
        a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
            outline: 3px solid rgba(46, 134, 193, 0.4);
            outline-offset: 2px;
        }
        ul, ol { margin: 0; padding: 0; }
        button { font-family: inherit; }

        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== 按钮 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 600;
            line-height: 1.4;
            cursor: pointer;
            border: 1px solid transparent;
            transition: all 0.25s ease;
            text-align: center;
            white-space: nowrap;
        }
        .btn--primary {
            background: var(--color-accent);
            color: var(--color-dark);
            border-color: var(--color-accent);
        }
        .btn--primary:hover {
            background: #33EAFF;
            border-color: #33EAFF;
            color: var(--color-dark);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.4);
            transform: translateY(-1px);
        }
        .btn--primary:active {
            transform: translateY(1px);
            box-shadow: 0 0 8px rgba(0, 229, 255, 0.25);
        }
        .btn--secondary {
            background: transparent;
            color: var(--color-primary-2);
            border: 1px solid var(--color-primary-2);
        }
        .btn--secondary:hover {
            background: rgba(46, 134, 193, 0.08);
            color: var(--color-primary);
            border-color: var(--color-primary);
        }
        .btn--secondary:active {
            background: rgba(46, 134, 193, 0.15);
            transform: translateY(1px);
        }
        .btn--sm { padding: 8px 18px; font-size: 14px; }
        .btn--block { width: 100%; }

        /* ========== 顶部导航 ========== */
        .site-header {
            background: var(--color-dark);
            position: relative;
            z-index: 100;
        }
        .site-header::after {
            content: "";
            display: block;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            position: relative;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            text-shadow: 0 0 12px rgba(0, 229, 255, 0.6);
            letter-spacing: 1px;
            padding: 6px 0;
        }
        .nav-logo:hover { color: #fff; opacity: 0.9; }
        .logo-mark {
            display: inline-block;
            width: 16px;
            height: 16px;
            background: linear-gradient(135deg, var(--color-accent), #2E86C1);
            border-radius: 4px;
            box-shadow: 0 0 10px rgba(0, 229, 255, 0.5);
            flex-shrink: 0;
        }
        .site-header .nav-menu {
            display: flex;
            align-items: center;
        }
        .nav__item { list-style: none; }
        .nav__link {
            display: inline-block;
            padding: 10px 14px;
            color: var(--color-text-dark);
            font-size: 15px;
            font-weight: 500;
            border-bottom: 2px solid transparent;
            transition: color 0.25s ease, border-color 0.25s ease, text-shadow 0.25s ease;
        }
        .nav__link:hover {
            color: #fff;
            border-bottom-color: rgba(0, 229, 255, 0.7);
        }
        .nav__link--active,
        .nav__link.nav__link--active {
            color: var(--color-accent);
            border-bottom-color: var(--color-accent);
            text-shadow: 0 0 12px rgba(0, 229, 255, 0.45);
        }
        .nav-cta { margin-left: 8px; }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: 0;
            padding: 8px;
            cursor: pointer;
        }
        .nav-toggle__line {
            display: block;
            width: 22px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: transform 0.25s ease, opacity 0.25s ease;
        }
        .nav-toggle:hover .nav-toggle__line { background: var(--color-accent); }

        @media (max-width: 1024px) {
            .nav-toggle { display: flex; }
            .site-header .nav-menu {
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--color-dark);
                flex-direction: column;
                align-items: stretch;
                padding: 0 24px 24px;
                display: none;
                box-shadow: 0 16px 32px rgba(0, 0, 0, 0.35);
                border-radius: 0 0 12px 12px;
            }
            .site-header .nav-menu.is-open { display: block; }
            .site-header .nav-menu ul {
                flex-direction: column !important;
                gap: 4px !important;
                width: 100%;
            }
            .site-header .nav-menu ul li { width: 100%; list-style: none; }
            .site-header .nav-menu ul li .nav__link {
                display: block;
                padding: 12px 8px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
                border-left: 2px solid transparent;
            }
            .site-header .nav-menu ul li .nav__link:hover {
                border-left-color: var(--color-accent);
                background: rgba(0, 229, 255, 0.04);
            }
            .site-header .nav-menu ul li .nav__link--active {
                border-left-color: var(--color-accent);
            }
            .nav-cta { margin: 16px 0 0; }
            .nav-cta .btn { width: 100%; }
        }

        /* ========== 面包屑 ========== */
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            font-size: 14px;
            color: var(--color-text-sub);
            margin: 0 0 16px;
        }
        .breadcrumb a { color: var(--color-text-sub); }
        .breadcrumb a:hover { color: var(--color-primary-2); }
        .breadcrumb__sep { margin: 0 8px; color: #A8B7C7; }
        .breadcrumb__current { color: var(--color-primary); font-weight: 500; }

        /* ========== 文章横幅 ========== */
        .article-banner {
            padding: 48px 0 36px;
            background: linear-gradient(180deg, #EEF5FA 0%, var(--color-bg) 100%);
            border-bottom: 1px solid var(--color-border);
        }
        .article-banner__inner { max-width: 880px; }
        .article-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--color-primary);
            line-height: 1.35;
            margin: 0 0 20px;
            word-break: break-word;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 10px 24px;
            font-size: 14px;
            color: var(--color-text-sub);
        }
        .article-meta__item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta__item::before {
            content: "";
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--color-primary-2);
            opacity: 0.6;
        }
        .article-meta__item:first-child::before { display: none; }

        /* ========== 文章主体 ========== */
        .article-main {
            padding: 48px 0 72px;
        }
        .article-layout { max-width: 880px; margin: 0 auto; }

        .article-cover {
            border-radius: var(--radius-card);
            overflow: hidden;
            margin-bottom: 36px;
            box-shadow: var(--shadow-sm);
        }
        .article-cover img {
            width: 100%;
            height: auto;
            display: block;
            object-fit: cover;
        }

        .article-content {
            font-size: 16px;
            line-height: 1.85;
            color: var(--color-text);
        }
        .article-content * + * { margin-top: 0; }
        .article-content p { margin: 0 0 20px; }
        .article-content h2 {
            font-size: 26px;
            color: var(--color-primary);
            font-weight: 700;
            margin: 40px 0 16px;
            padding-left: 14px;
            border-left: 4px solid var(--color-primary-2);
            line-height: 1.4;
        }
        .article-content h3 {
            font-size: 20px;
            color: var(--color-primary);
            font-weight: 600;
            margin: 32px 0 12px;
        }
        .article-content h4 {
            font-size: 17px;
            color: var(--color-text);
            font-weight: 600;
            margin: 24px 0 10px;
        }
        .article-content a { color: var(--color-primary-2); text-decoration: underline; text-underline-offset: 3px; }
        .article-content a:hover { color: var(--color-primary); }
        .article-content blockquote {
            margin: 24px 0;
            padding: 16px 24px;
            background: #EAF2F8;
            border-left: 4px solid var(--color-primary-2);
            border-radius: 0 8px 8px 0;
            color: var(--color-text-sub);
        }
        .article-content ul,
        .article-content ol {
            margin: 0 0 20px 24px;
        }
        .article-content ul li,
        .article-content ol li {
            margin-bottom: 8px;
        }
        .article-content img {
            border-radius: var(--radius-card);
            margin: 24px 0;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 15px;
            border: 1px solid var(--color-border);
        }
        .article-content table th {
            background: #EAF2F8;
            font-weight: 600;
            color: var(--color-primary);
            text-align: left;
        }
        .article-content table th,
        .article-content table td {
            padding: 10px 14px;
            border: 1px solid var(--color-border);
        }
        .article-content pre {
            background: var(--color-dark);
            color: var(--color-text-dark);
            padding: 18px 20px;
            border-radius: 8px;
            overflow-x: auto;
            margin: 24px 0;
            font-size: 14px;
            line-height: 1.7;
        }
        .article-content pre code { background: transparent; padding: 0; color: inherit; }
        .article-content code {
            background: #EAF2F8;
            color: #1B4F72;
            padding: 2px 6px;
            border-radius: 4px;
            font-size: 14px;
        }
        .article-content hr {
            border: 0;
            height: 1px;
            background: var(--color-border);
            margin: 32px 0;
        }
        .article-content .table-wrap { overflow-x: auto; }

        /* ========== 文章底部导航 ========== */
        .article-footer-nav {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            margin: 48px 0 24px;
            padding: 20px 0;
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }

        .article-prevnext {
            margin: 0 0 56px;
        }
        .article-prevnext .cell {
            padding: 8px;
        }
        .prevnext-card {
            display: block;
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 20px 22px;
            min-height: 96px;
            box-shadow: var(--shadow-sm);
            transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
        }
        .prevnext-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
            border-color: var(--color-primary-2);
        }
        .prevnext-card--next { text-align: right; }
        .prevnext-card__label {
            display: block;
            font-size: 13px;
            color: var(--color-text-sub);
            margin-bottom: 6px;
        }
        .prevnext-card__title {
            display: block;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-primary);
            line-height: 1.5;
        }

        /* ========== 相关推荐 ========== */
        .related-section {
            margin-top: 8px;
        }
        .related-section__header {
            display: flex;
            align-items: baseline;
            justify-content: space-between;
            margin-bottom: 24px;
        }
        .related-section__title {
            font-size: 24px;
            color: var(--color-primary);
            font-weight: 700;
            margin: 0;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            display: flex;
            flex-direction: column;
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .related-card__thumb {
            width: 100%;
            height: 160px;
            overflow: hidden;
            background: #EAF2F8;
        }
        .related-card__thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .related-card:hover .related-card__thumb img {
            transform: scale(1.04);
        }
        .related-card__body {
            padding: 20px 22px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 3px 12px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 500;
            line-height: 1.6;
            width: fit-content;
            margin-bottom: 10px;
        }
        .badge--blue {
            background: rgba(46, 134, 193, 0.12);
            color: var(--color-primary-2);
        }
        .related-card__title {
            font-size: 17px;
            font-weight: 600;
            color: var(--color-primary);
            line-height: 1.5;
            margin: 0 0 10px;
        }
        .related-card__excerpt {
            font-size: 14px;
            color: var(--color-text-sub);
            line-height: 1.7;
            margin: 0 0 14px;
            flex: 1;
        }
        .related-card__meta {
            font-size: 13px;
            color: #8A99A8;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .related-card__meta .arrow { transition: transform 0.2s ease; }
        .related-card:hover .related-card__meta .arrow { transform: translateX(4px); }

        /* ========== CTA 条 ========== */
        .cta-strip {
            background: #EAF2F8;
            border-top: 1px solid var(--color-border);
            padding: 56px 0;
        }
        .cta-strip__inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }
        .cta-strip__text h3 {
            font-size: 24px;
            color: var(--color-primary);
            margin: 0 0 8px;
        }
        .cta-strip__text p {
            font-size: 15px;
            color: var(--color-text-sub);
            margin: 0;
        }

        /* ========== 空状态 ========== */
        .article-empty {
            padding: 120px 24px;
            text-align: center;
            min-height: 50vh;
        }
        .article-empty h1 {
            font-size: 32px;
            color: var(--color-primary);
            margin: 0 0 12px;
        }
        .article-empty p {
            color: var(--color-text-sub);
            margin-bottom: 24px;
        }

        /* ========== 表单弹层 ========== */
        .reveal {
            border-radius: 16px;
            border: 0;
            max-width: 520px;
            padding: 0;
            overflow: hidden;
            box-shadow: 0 24px 64px rgba(11, 29, 42, 0.28);
        }
        .reveal::before {
            content: "";
            display: block;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
        }
        .reveal .modal-header {
            padding: 28px 32px 0;
        }
        .reveal .modal-header h3 {
            font-size: 22px;
            color: var(--color-primary);
            margin: 0 0 6px;
        }
        .reveal .modal-header p {
            font-size: 14px;
            color: var(--color-text-sub);
            margin: 0 0 20px;
        }
        .reveal .contact-form {
            padding: 0 32px 32px;
        }
        .reveal .contact-form label {
            display: block;
            font-size: 14px;
            color: var(--color-text);
            font-weight: 500;
            margin-bottom: 14px;
        }
        .reveal .contact-form input,
        .reveal .contact-form textarea {
            width: 100%;
            height: 42px;
            border: 1px solid #D5DCE4;
            border-radius: 6px;
            padding: 8px 12px;
            font-size: 15px;
            font-family: inherit;
            margin-top: 6px;
            background: #fff;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }
        .reveal .contact-form textarea { height: auto; resize: vertical; }
        .reveal .contact-form input:focus,
        .reveal .contact-form textarea:focus {
            border-color: var(--color-primary-2);
            outline: none;
            box-shadow: 0 0 0 3px rgba(46, 134, 193, 0.12);
        }
        .reveal .contact-form .btn--block { margin-top: 6px; }
        .reveal .close-button {
            position: absolute;
            top: 12px;
            right: 12px;
            background: transparent;
            border: 0;
            font-size: 28px;
            color: var(--color-text-sub);
            cursor: pointer;
            transition: color 0.2s ease, transform 0.2s ease;
        }
        .reveal .close-button:hover { color: var(--color-error); }
        .reveal .close-button:active { transform: scale(0.94); }
        .contact-success {
            display: none;
            padding: 10px 14px;
            border-radius: 6px;
            background: rgba(39, 174, 96, 0.12);
            color: var(--color-success);
            font-size: 14px;
            margin-bottom: 12px;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--color-dark);
            color: var(--color-text-dark);
            padding: 56px 0 24px;
            position: relative;
        }
        .site-footer::before {
            content: "";
            display: block;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            text-shadow: 0 0 12px rgba(0, 229, 255, 0.45);
            margin-bottom: 14px;
        }
        .footer-brand__desc {
            font-size: 14px;
            line-height: 1.8;
            color: var(--color-text-dark);
            margin: 0;
            max-width: 300px;
        }
        .footer-col__title {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin: 0 0 14px;
        }
        .footer-links,
        .footer-contact {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
            font-size: 14px;
        }
        .footer-links a {
            color: var(--color-text-dark);
            transition: color 0.2s ease, padding-left 0.2s ease;
        }
        .footer-links a:hover { color: var(--color-accent); padding-left: 4px; }
        .footer-contact li { font-size: 14px; }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 8px;
            font-size: 13px;
            color: #7B8B9C;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }

        @media (max-width: 768px) {
            .article-banner { padding: 32px 0 24px; }
            .article-title { font-size: 26px; }
            .article-main { padding: 32px 0 48px; }
            .article-cover { margin-bottom: 24px; }
            .article-content h2 { font-size: 22px; }
            .cta-strip__inner { flex-direction: column; align-items: flex-start; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .article-prevnext .cell { flex: 0 0 100%; max-width: 100%; }
            .article-footer-nav { flex-direction: column; align-items: flex-start; }
        }

        @media (max-width: 520px) {
            .container-custom { padding: 0 16px; }
            .hero-title { font-size: 30px; }
            .article-title { font-size: 22px; }
            .related-card__thumb { height: 140px; }
            .footer-bottom { flex-direction: column; }
        }

/* roulang page: category3 */
:root {
            --color-primary: #1B4F72;
            --color-primary-light: #2E86C1;
            --color-accent: #00E5FF;
            --color-bg: #F4F7FB;
            --color-white: #FFFFFF;
            --color-dark: #0B1D2A;
            --color-text: #1A2B3C;
            --color-text-secondary: #5B6B7A;
            --color-text-light: #C5D3DE;
            --color-border: #E1E8F0;
            --color-success: #27AE60;
            --color-error: #E74C3C;
            --shadow-card: 0 2px 8px rgba(11, 29, 42, 0.06);
            --shadow-card-hover: 0 12px 28px rgba(11, 29, 42, 0.12);
            --radius-card: 10px;
            --radius-btn: 8px;
            --radius-pill: 20px;
            --radius-input: 6px;
            --space-sm: 16px;
            --space-md: 32px;
            --space-lg: 64px;
            --space-xl: 80px;
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
            border-radius: var(--radius-card);
        }

        a {
            color: var(--color-primary-light);
            text-decoration: none;
            transition: color .2s ease, opacity .2s ease;
        }

        a:hover {
            color: var(--color-primary);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 3px solid rgba(46, 134, 193, 0.35);
            outline-offset: 2px;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .section {
            padding: var(--space-lg) 0;
        }

        .section--sm {
            padding: var(--space-md) 0;
        }

        .text-center {
            text-align: center;
        }

        h1,
        h2,
        h3,
        h4,
        h5 {
            color: var(--color-primary);
            line-height: 1.35;
            font-weight: 600;
        }

        h1 {
            font-size: 30px;
        }

        h2 {
            font-size: 22px;
            margin-bottom: 8px;
        }

        h3 {
            font-size: 18px;
            margin-bottom: 6px;
        }

        .section-heading {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 40px;
        }

        .section-heading h2 {
            font-size: 28px;
        }

        .section-heading p {
            color: var(--color-text-secondary);
            margin-top: 6px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 16px;
            font-weight: 600;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            border: 0;
            cursor: pointer;
            transition: all .25s ease;
            text-align: center;
            line-height: 1.4;
        }

        .btn--primary {
            background: var(--color-accent);
            color: var(--color-dark);
            box-shadow: 0 2px 8px rgba(0, 229, 255, 0.25);
        }

        .btn--primary:hover {
            background: #33EAFF;
            color: var(--color-dark);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.4);
            transform: translateY(-1px);
        }

        .btn--primary:active {
            transform: translateY(1px);
            box-shadow: 0 0 10px rgba(0, 229, 255, 0.25);
        }

        .btn--secondary {
            background: transparent;
            color: var(--color-primary-light);
            border: 1px solid var(--color-primary-light);
        }

        .btn--secondary:hover {
            background: rgba(46, 134, 193, 0.08);
            color: var(--color-primary);
        }

        .btn--secondary:active {
            background: rgba(46, 134, 193, 0.14);
            color: var(--color-primary);
            transform: translateY(1px);
        }

        .btn--light-outline {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.7);
        }

        .btn--light-outline:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }

        .btn--block {
            width: 100%;
        }

        .btn--lg {
            padding: 14px 32px;
            font-size: 17px;
        }

        /* ---- 导航 ---- */
        .site-header {
            background: var(--color-dark);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 1px 0 rgba(0, 229, 255, 0.15);
        }

        .site-header::after {
            content: '';
            display: block;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 64px;
            gap: 16px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
            text-shadow: 0 0 12px rgba(0, 229, 255, 0.6);
            white-space: nowrap;
        }

        .nav-logo:hover {
            color: var(--color-accent);
        }

        .logo-mark {
            width: 16px;
            height: 16px;
            border-radius: 4px;
            background: linear-gradient(135deg, var(--color-accent), #0066FF);
            display: inline-block;
            box-shadow: 0 0 10px rgba(0, 229, 255, 0.5);
            flex-shrink: 0;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav__item {
            position: relative;
        }

        .nav__link {
            display: inline-block;
            color: #9FB3C8;
            font-size: 15px;
            font-weight: 500;
            padding: 8px 6px;
            margin: 0 10px;
            position: relative;
            transition: color .2s ease;
            text-decoration: none;
        }

        .nav__link::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: -4px;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
            transform: scaleX(0);
            transition: transform .25s ease;
        }

        .nav__link:hover {
            color: #fff;
        }

        .nav__link:hover::after {
            transform: scaleX(1);
        }

        .nav__link--active {
            color: var(--color-accent);
            text-shadow: 0 0 10px rgba(0, 229, 255, 0.5);
        }

        .nav__link--active::after {
            transform: scaleX(1);
        }

        .nav-cta {
            margin-left: 12px;
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: 0;
            padding: 10px;
            cursor: pointer;
        }

        .nav-toggle__line {
            display: block;
            width: 24px;
            height: 2px;
            background: #fff;
            margin: 5px 0;
            border-radius: 2px;
            transition: all .25s ease;
        }

        /* ---- 面包屑 ---- */
        .breadcrumb-wrap {
            background: var(--color-white);
            border-bottom: 1px solid var(--color-border);
            padding: 14px 0;
        }

        .breadcrumb {
            font-size: 14px;
            color: var(--color-text-secondary);
        }

        .breadcrumb a {
            color: var(--color-primary-light);
        }

        .breadcrumb a:hover {
            color: var(--color-primary);
        }

        .breadcrumb .sep {
            margin: 0 8px;
            color: #B0C0CE;
        }

        /* ---- 页面 Banner ---- */
        .page-banner {
            background: linear-gradient(135deg, #EAF2FA 0%, #F7FAFD 60%, #EAF7FE 100%);
            padding: 64px 0 72px;
            border-bottom: 1px solid var(--color-border);
            position: relative;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -60px;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(0, 229, 255, 0.14) 0%, transparent 70%);
            border-radius: 50%;
            z-index: 0;
        }

        .page-banner .container-custom {
            position: relative;
            z-index: 1;
        }

        .banner-wrap {
            display: flex;
            align-items: center;
            gap: 40px;
        }

        .banner-copy {
            flex: 1;
        }

        .banner-copy h1 {
            font-size: 34px;
            line-height: 1.35;
            margin-bottom: 12px;
            color: var(--color-primary);
        }

        .banner-copy .lead {
            font-size: 17px;
            color: var(--color-text-secondary);
            margin-bottom: 20px;
            max-width: 520px;
        }

        .banner-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 16px;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--color-white);
            border: 1px solid var(--color-border);
            color: var(--color-text-secondary);
            font-size: 13px;
            font-weight: 500;
            padding: 4px 14px;
            border-radius: var(--radius-pill);
            box-shadow: 0 1px 4px rgba(11, 29, 42, 0.04);
        }

        .tag i {
            color: var(--color-accent);
            font-size: 12px;
        }

        .banner-img {
            flex: 1;
            max-width: 420px;
        }

        .banner-img img {
            border-radius: 14px;
            box-shadow: 0 16px 40px rgba(11, 29, 42, 0.14);
        }

        /* ---- 主内容布局 ---- */
        .content-section {
            padding: var(--space-lg) 0;
        }

        .content-grid {
            display: flex;
            gap: 32px;
            align-items: flex-start;
        }

        .content-main {
            flex: 1;
            min-width: 0;
        }

        .sidebar {
            width: 320px;
            flex-shrink: 0;
            position: sticky;
            top: 90px;
        }

        .prose {
            background: var(--color-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 36px;
            border: 1px solid var(--color-border);
        }

        .prose h2 {
            font-size: 22px;
            margin-top: 36px;
            margin-bottom: 10px;
            padding-bottom: 8px;
            border-bottom: 2px solid rgba(46, 134, 193, 0.15);
        }

        .prose h3 {
            font-size: 18px;
            margin-top: 24px;
            margin-bottom: 4px;
        }

        .prose p {
            margin-bottom: 14px;
            color: var(--color-text);
        }

        .prose ul,
        .prose ol {
            margin: 0 0 16px 20px;
            color: var(--color-text);
        }

        .prose li {
            margin-bottom: 6px;
        }

        .prose img {
            margin: 18px 0;
            border-radius: 12px;
            box-shadow: 0 8px 20px rgba(11, 29, 42, 0.08);
        }

        .prose blockquote {
            background: #F0F7FC;
            border-left: 4px solid var(--color-primary-light);
            padding: 14px 20px;
            border-radius: 0 8px 8px 0;
            margin: 16px 0;
            color: var(--color-text-secondary);
            font-style: normal;
        }

        .prose blockquote strong {
            color: var(--color-primary);
        }

        .prose a {
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        /* 核心能力卡片 */
        .capability-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin-top: 24px;
        }

        .capability-card {
            background: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 24px;
            box-shadow: var(--shadow-card);
            transition: all .25s ease;
        }

        .capability-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: rgba(46, 134, 193, 0.3);
        }

        .capability-card .icon-wrap {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(0, 229, 255, 0.15), rgba(46, 134, 193, 0.12));
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 14px;
            font-size: 20px;
            color: var(--color-primary-light);
        }

        .capability-card h3 {
            font-size: 17px;
            color: var(--color-primary);
        }

        .capability-card p {
            color: var(--color-text-secondary);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* 流程时间线 */
        .timeline {
            position: relative;
            margin: 28px 0 8px;
            padding-left: 28px;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 10px;
            top: 4px;
            bottom: 4px;
            width: 2px;
            background: linear-gradient(180deg, var(--color-accent), var(--color-primary-light));
            border-radius: 2px;
        }

        .timeline-item {
            position: relative;
            margin-bottom: 26px;
            padding-left: 20px;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -24px;
            top: 6px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--color-white);
            border: 3px solid var(--color-primary-light);
            box-shadow: 0 0 0 3px rgba(46, 134, 193, 0.15);
        }

        .timeline-item h3 {
            font-size: 17px;
            margin-bottom: 2px;
        }

        .timeline-item p {
            color: var(--color-text-secondary);
            font-size: 14px;
            margin-bottom: 0;
        }

        /* 侧边栏 */
        .sidebar-card {
            background: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 24px;
            margin-bottom: 20px;
        }

        .sidebar-card h3 {
            font-size: 17px;
            margin-bottom: 14px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--color-border);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-card h3 i {
            color: var(--color-accent);
        }

        .sidebar-links {
            list-style: none;
            margin: 0;
        }

        .sidebar-links li {
            margin-bottom: 10px;
        }

        .sidebar-links a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 14px;
            background: var(--color-bg);
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-primary);
            transition: all .25s ease;
        }

        .sidebar-links a:hover {
            background: rgba(46, 134, 193, 0.1);
            transform: translateX(4px);
            color: var(--color-primary-light);
        }

        .sidebar-links a span {
            color: var(--color-text-secondary);
            font-size: 16px;
        }

        .sidebar-contact li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            margin-bottom: 10px;
            font-size: 14px;
            color: var(--color-text-secondary);
        }

        .sidebar-contact li i {
            color: var(--color-primary-light);
            margin-top: 4px;
            font-size: 13px;
            width: 16px;
        }

        .sidebar-note {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            background: #F0F7FC;
            padding: 14px;
            border-radius: 8px;
            margin-top: 12px;
        }

        .sidebar-note i {
            color: var(--color-primary-light);
            margin-top: 4px;
        }

        .sidebar-note p {
            font-size: 13px;
            color: var(--color-text-secondary);
            margin-bottom: 0;
            line-height: 1.6;
        }

        .sidebar-trust {
            display: flex;
            align-items: center;
            gap: 12px;
            background: var(--color-bg);
            border-radius: 8px;
            padding: 14px;
            margin-top: 14px;
        }

        .sidebar-trust i {
            font-size: 28px;
            color: var(--color-accent);
        }

        .sidebar-trust div {
            font-size: 13px;
            color: var(--color-text-secondary);
        }

        .sidebar-trust strong {
            display: block;
            color: var(--color-primary);
            font-size: 14px;
        }

        /* CTA 条 */
        .cta-strip {
            background: var(--color-dark);
            padding: 64px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-strip::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80%;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
        }

        .cta-strip::after {
            content: '';
            position: absolute;
            right: -60px;
            bottom: -60px;
            width: 220px;
            height: 220px;
            background: radial-gradient(circle, rgba(0, 229, 255, 0.08), transparent 70%);
            border-radius: 50%;
        }

        .cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }

        .cta-copy h2 {
            color: #fff;
            margin-bottom: 6px;
            font-size: 26px;
        }

        .cta-copy p {
            color: var(--color-text-light);
            margin-bottom: 0;
            max-width: 560px;
        }

        .cta-action {
            flex-shrink: 0;
        }

        /* FAQ */
        .faq-section {
            padding: var(--space-lg) 0;
            background: var(--color-white);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }

        .accordion-item {
            background: var(--color-white);
            border: 1px solid var(--color-border) !important;
            border-radius: 10px;
            margin-bottom: 8px;
            overflow: hidden;
            box-shadow: 0 1px 4px rgba(11, 29, 42, 0.03);
            transition: box-shadow .25s ease, border-color .25s ease;
        }

        .accordion-item:hover {
            box-shadow: var(--shadow-card-hover);
            border-left: 2px solid var(--color-accent) !important;
        }

        .accordion-title {
            background: var(--color-white) !important;
            border-bottom: 1px solid var(--color-border) !important;
            color: var(--color-primary) !important;
            font-weight: 600;
            font-size: 16px;
            padding: 16px 22px;
            display: flex;
            align-items: center;
            gap: 12px;
            transition: background .2s ease;
        }

        .accordion-title:hover {
            background: #F8FBFD !important;
        }

        .accordion-title::before {
            content: '\f067';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: var(--color-accent);
            font-size: 13px;
            background: rgba(0, 229, 255, 0.1);
            width: 26px;
            height: 26px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .accordion-item.is-active>.accordion-title::before {
            content: '\f068';
        }

        .accordion-content {
            background: var(--color-white) !important;
            border-bottom: 0 !important;
            padding: 4px 22px 18px 60px;
            color: var(--color-text-secondary);
            font-size: 15px;
            line-height: 1.8;
        }

        .accordion-content p:last-child {
            margin-bottom: 0;
        }

        /* Footer */
        .site-footer {
            background: var(--color-dark);
            padding: 56px 0 0;
            position: relative;
        }

        .site-footer::before {
            content: '';
            display: block;
            height: 1px;
            background: linear-gradient(90deg, transarent, var(--color-accent), transparent);
        }

        .site-footer::after {
            content: '';
            display: block;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            text-shadow: 0 0 12px rgba(0, 229, 255, 0.5);
            margin-bottom: 12px;
        }

        .footer-brand__desc {
            color: var(--color-text-light);
            font-size: 14px;
            line-height: 1.7;
            max-width: 280px;
        }

        .footer-col__title {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 14px;
        }

        .footer-links {
            list-style: none;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: 8px;
        }

        .footer-links a {
            color: var(--color-text-light);
            font-size: 14px;
            transition: color .2s ease, padding-left .2s ease;
        }

        .footer-links a:hover {
            color: var(--color-accent);
            padding-left: 4px;
        }

        .footer-contact {
            list-style: none;
            margin: 0;
            color: var(--color-text-light);
            font-size: 14px;
        }

        .footer-contact li {
            margin-bottom: 8px;
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }

        .footer-contact li i {
            margin-top: 4px;
            color: var(--color-text-light);
            font-size: 12px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 18px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.42);
        }

        /* 表单弹层 */
        .reveal-modal-custom {
            max-width: 520px;
            border-radius: 12px;
            border: 0;
            padding: 36px;
            box-shadow: 0 30px 60px rgba(11, 29, 42, 0.25);
            position: relative;
        }

        .reveal-modal-custom::before {
            content: '';
            display: block;
            height: 3px;
            border-radius: 3px 3px 0 0;
            background: linear-gradient(90deg, var(--color-accent), #0066FF);
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
        }

        .reveal-modal-custom h2 {
            font-size: 22px;
            margin-bottom: 4px;
        }

        .reveal-modal-custom .sub {
            color: var(--color-text-secondary);
            font-size: 14px;
            margin-bottom: 20px;
        }

        .form-field {
            margin-bottom: 16px;
        }

        .form-field label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 6px;
        }

        .form-field input,
        .form-field textarea {
            width: 100%;
            height: 42px;
            border-radius: var(--radius-input);
            border: 1px solid #D5DCE4;
            padding: 0 14px;
            font-family: var(--font-sans);
            font-size: 15px;
            color: var(--color-text);
            background: var(--color-white);
            transition: all .2s ease;
        }

        .form-field textarea {
            height: auto;
            padding: 12px 14px;
            resize: vertical;
            min-height: 80px;
        }

        .form-field input:focus,
        .form-field textarea:focus {
            border-color: var(--color-primary-light);
            box-shadow: 0 0 0 3px rgba(46, 134, 193, 0.12);
            outline: none;
        }

        .reveal-overlay-custom {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(11, 29, 42, 0.6);
            backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
            z-index: 1500;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .reveal-overlay-custom.is-open {
            display: flex;
        }

        .close-btn {
            position: absolute;
            top: 16px;
            right: 16px;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: var(--color-bg);
            border: 0;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-text-secondary);
            transition: all .25s ease;
        }

        .close-btn:hover {
            background: rgba(231, 76, 60, 0.1);
            color: var(--color-error);
            transform: rotate(90deg);
        }

        /* 移动端导航 */
        @media (max-width: 1024px) {
            .content-grid {
                flex-direction: column;
            }

            .sidebar {
                width: 100%;
                position: static;
                display: grid;
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .sidebar-card {
                margin-bottom: 0;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .page-banner {
                padding: 40px 0 48px;
            }

            .banner-wrap {
                flex-direction: column;
                gap: 28px;
            }

            .banner-img {
                max-width: none;
                order: -1;
            }

            .banner-copy h1 {
                font-size: 28px;
            }

            .capability-grid {
                grid-template-columns: 1fr;
            }

            .nav-container {
                flex-wrap: wrap;
                padding-top: 8px;
                padding-bottom: 8px;
            }

            .nav-toggle {
                display: block;
                margin-left: auto;
            }

            .nav-toggle.is-open .nav-toggle__line:nth-child(1) {
                transform: translateY(7px) rotate(45deg);
            }

            .nav-toggle.is-open .nav-toggle__line:nth-child(2) {
                opacity: 0;
            }

            .nav-toggle.is-open .nav-toggle__line:nth-child(3) {
                transform: translateY(-7px) rotate(-45deg);
            }

            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                padding: 12px 0 18px;
                gap: 0;
            }

            .nav-menu.is-open {
                display: flex;
                animation: fadeIn .2s ease;
            }

            .nav-menu li {
                width: 100%;
                margin-bottom: 4px;
            }

            .nav-menu .nav__link {
                display: block;
                padding: 10px 8px;
                margin: 0;
                width: 100%;
            }

            .nav-menu .nav-cta {
                margin-left: 0;
                margin-top: 10px;
            }

            .nav-menu .nav-cta .btn {
                width: 100%;
            }

            .sidebar {
                display: block;
            }

            .sidebar-card {
                margin-bottom: 16px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
            }

            .cta-inner {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }

            .cta-action {
                width: 100%;
            }

            .cta-action .btn {
                width: 100%;
            }

            .reveal-modal-custom {
                padding: 28px 22px;
                max-height: 90vh;
                overflow-y: auto;
            }
        }

        @media (max-width: 520px) {
            :root {
                --space-lg: 44px;
                --space-xl: 56px;
            }

            .nav-logo {
                font-size: 18px;
            }

            .prose {
                padding: 22px 18px;
            }

            .capability-grid {
                gap: 14px;
            }

            .timeline {
                padding-left: 22px;
            }

            .timeline-item {
                padding-left: 14px;
            }

            .timeline-item::before {
                left: -20px;
                width: 10px;
                height: 10px;
                border-width: 2px;
            }

            .accordion-content {
                padding: 4px 16px 16px 18px;
                font-size: 14px;
            }

            .banner-copy h1 {
                font-size: 24px;
            }

            .banner-copy .lead {
                font-size: 15px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 4px;
            }
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(-8px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

/* roulang page: category2 */
/* ===== Design Tokens ===== */
:root{
    --color-primary:#1B4F72;
    --color-secondary:#2E86C1;
    --color-accent:#00E5FF;
    --color-bg:#F4F7FB;
    --color-card:#FFFFFF;
    --color-dark:#0B1D2A;
    --color-text:#1A2B3C;
    --color-text-light:#5B6B7A;
    --color-text-dark-bg:#C5D3DE;
    --color-border:#E1E8F0;
    --shadow-card:0 2px 8px rgba(11,29,42,0.06);
    --shadow-card-hover:0 12px 28px rgba(11,29,42,0.12);
    --radius-card:12px;
    --radius-btn:8px;
    --radius-input:6px;
    --space-sm:16px;
    --space-md:32px;
    --space-lg:64px;
    --space-xl:80px;
}
/* ===== Reset / Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;background:var(--color-bg);color:var(--color-text);font-size:16px;line-height:1.8;-webkit-font-smoothing:antialiased;}
img{max-width:100%;display:block;height:auto;}
a{color:var(--color-secondary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--color-primary);}
input,button,textarea,select{font:inherit;}
ul,ol{list-style:none;}
button:focus, a:focus, input:focus, textarea:focus{outline:2px solid rgba(0,229,255,0.5);outline-offset:2px;}
::selection{background:rgba(46,134,193,0.2);}

/* ===== Layout ===== */
.container-custom{max-width:1200px;margin:0 auto;padding:0 20px;}
.grid-container{max-width:1200px;}

/* ===== Section ===== */
.section{padding:var(--space-xl) 0;}
.section--white{background:var(--color-card);}
.section--gray{background:var(--color-bg);}
.section-tag{display:inline-block;background:rgba(46,134,193,0.12);color:var(--color-secondary);font-size:13px;font-weight:600;padding:4px 14px;border-radius:20px;letter-spacing:0.5px;margin-bottom:16px;}
.section-head{text-align:center;max-width:680px;margin:0 auto 48px;}
.section-head h2{font-size:32px;color:var(--color-primary);font-weight:600;line-height:1.4;margin-bottom:14px;}
.section-head p{color:var(--color-text-light);font-size:16px;line-height:1.8;}

/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:var(--radius-btn);font-size:16px;font-weight:600;padding:12px 24px;border:0;cursor:pointer;transition:all .2s ease;text-decoration:none;line-height:1.4;letter-spacing:0.3px;}
.btn--primary{background:var(--color-accent);color:var(--color-dark);}
.btn--primary:hover{background:#33EAFF;box-shadow:0 0 20px rgba(0,229,255,0.4);transform:translateY(-1px);color:var(--color-dark);}
.btn--primary:active{transform:translateY(1px);box-shadow:0 0 8px rgba(0,229,255,0.25);}
.btn--outline{background:transparent;border:1px solid var(--color-secondary);color:var(--color-secondary);}
.btn--outline:hover{background:rgba(46,134,193,0.08);color:var(--color-primary);}
.btn--white-outline{background:transparent;border:1px solid rgba(255,255,255,0.8);color:#fff;}
.btn--white-outline:hover{background:rgba(255,255,255,0.08);color:#fff;border-color:#fff;}
.btn--block{width:100%;}
.btn--lg{padding:14px 32px;font-size:17px;}

/* ===== Header / Nav ===== */
.site-header{position:sticky;top:0;z-index:100;background:var(--color-dark);box-shadow:0 4px 20px rgba(0,0,0,0.35);}
.nav-container{display:flex;align-items:center;justify-content:space-between;height:64px;position:relative;}
.site-header::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:linear-gradient(90deg,transparent,#00E5FF,transparent);}
.nav-logo{display:flex;align-items:center;gap:10px;color:#fff;font-size:20px;font-weight:700;letter-spacing:0.5px;text-shadow:0 0 12px rgba(0,229,255,0.6);}
.nav-logo:hover{color:#fff;}
.logo-mark{width:14px;height:14px;background:linear-gradient(135deg,#00E5FF,#2E86C1);border-radius:3px;box-shadow:0 0 10px rgba(0,229,255,0.7);flex-shrink:0;}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:10px;flex-direction:column;gap:5px;align-items:center;justify-content:center;border-radius:6px;}
.nav-toggle:hover{background:rgba(255,255,255,0.06);}
.nav-toggle__line{width:22px;height:2px;background:#C5D3DE;border-radius:2px;transition:transform .25s ease,opacity .25s ease,background .25s ease;}
.nav-toggle.is-open .nav-toggle__line:nth-child(1){transform:rotate(45deg) translate(5px,5px);background:#00E5FF;}
.nav-toggle.is-open .nav-toggle__line:nth-child(2){opacity:0;}
.nav-toggle.is-open .nav-toggle__line:nth-child(3){transform:rotate(-45deg) translate(5px,-5px);background:#00E5FF;}
nav.nav-menu{display:flex;align-items:center;}
nav.nav-menu ul.nav-menu{display:flex;align-items:center;gap:6px;list-style:none;margin:0;padding:0;}
.nav__item{position:relative;}
.nav__link{display:block;padding:10px 14px;font-size:15px;color:#9FB3C8;font-weight:500;transition:color .2s ease,border-color .2s ease,text-shadow .2s ease;border-bottom:2px solid transparent;text-decoration:none;}
.nav__link:hover{color:#fff;}
.nav__link--active{color:#00E5FF;text-shadow:0 0 10px rgba(0,229,255,0.55);border-bottom-color:#00E5FF;}
.nav-cta{margin-left:8px;}

/* ===== Breadcrumb ===== */
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,0.7);flex-wrap:wrap;margin-bottom:8px;}
.breadcrumb a{color:rgba(255,255,255,0.85);text-decoration:none;transition:color .2s;}
.breadcrumb a:hover{color:#00E5FF;}
.breadcrumb span{color:rgba(255,255,255,0.45);}

/* ===== Page Hero ===== */
.page-hero{position:relative;background-size:cover;background-position:center;padding:92px 0 84px;color:#fff;overflow:hidden;}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(90deg,rgba(11,29,42,0.94) 0%,rgba(11,29,42,0.78) 55%,rgba(18,45,64,0.6) 100%);}
.page-hero .container-custom{position:relative;z-index:2;}
.page-hero h1{font-size:44px;font-weight:700;line-height:1.3;color:#fff;margin:20px 0 18px;max-width:720px;letter-spacing:0.5px;}
.page-hero .lead{font-size:18px;color:var(--color-text-dark-bg);line-height:1.9;max-width:660px;margin-bottom:32px;}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;align-items:center;}

/* ===== Intro Two Column ===== */
.intro-section{background:var(--color-card);}
.intro-section h2{font-size:30px;color:var(--color-primary);font-weight:600;line-height:1.5;margin-bottom:18px;}
.intro-section p{color:var(--color-text-light);margin-bottom:16px;line-height:1.9;font-size:16px;}
.intro-card{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-card);padding:30px;box-shadow:var(--shadow-card);height:100%;transition:box-shadow .25s ease,transform .25s ease;}
.intro-card:hover{box-shadow:var(--shadow-card-hover);transform:translateY(-3px);}
.intro-card h3{font-size:18px;color:var(--color-primary);margin-bottom:18px;font-weight:600;}
.intro-card ul li{position:relative;padding-left:22px;margin-bottom:13px;color:var(--color-text);font-size:15px;line-height:1.7;}
.intro-card ul li::before{content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:2px;background:var(--color-accent);box-shadow:0 0 6px rgba(0,229,255,0.6);}
.intro-note{margin-top:18px;padding:14px 18px;background:rgba(46,134,193,0.08);border-radius:8px;font-size:14px;color:var(--color-text);border-left:3px solid var(--color-secondary);}

/* ===== Service Cards ===== */
.service-section{background:var(--color-bg);}
.service-card{background:#fff;border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:28px;transition:box-shadow .25s ease,transform .25s ease;border:1px solid transparent;height:100%;}
.service-card:hover{box-shadow:var(--shadow-card-hover);transform:translateY(-3px);}
.service-card--wide{display:flex;gap:0;align-items:stretch;padding:0;overflow:hidden;height:100%;}
.service-card__icon{width:46px;height:46px;border-radius:10px;background:rgba(46,134,193,0.1);display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-bottom:16px;}
.service-card__icon svg{width:22px;height:22px;stroke:var(--color-secondary);}
.service-card--wide .service-card__content{flex:1;padding:30px 24px 30px 30px;display:flex;flex-direction:column;justify-content:center;}
.service-card--wide .service-card__img{width:38%;flex-shrink:0;min-height:220px;position:relative;overflow:hidden;}
.service-card--wide .service-card__img img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;}
.service-card__content h3{font-size:20px;color:var(--color-primary);font-weight:600;margin-bottom:12px;line-height:1.4;}
.service-card__content p{color:var(--color-text-light);font-size:15px;line-height:1.8;margin-bottom:14px;}
.service-card__list{margin-top:2px;}
.service-card__list li{position:relative;padding-left:18px;margin-bottom:8px;font-size:14px;color:var(--color-text);}
.service-card__list li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:1px;background:var(--color-secondary);}
.service-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--color-secondary);margin-top:14px;text-decoration:none;transition:gap .2s ease;color:var(--color-secondary);}
.service-link:hover{gap:10px;color:var(--color-primary);}
.service-link svg{width:16px;height:16px;stroke:currentColor;}

/* ===== Scene Cards ===== */
.scene-section{background:var(--color-card);}
.scene-card{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-card);padding:30px 28px;position:relative;transition:box-shadow .25s ease,transform .25s ease;height:100%;}
.scene-card:hover{box-shadow:var(--shadow-card-hover);transform:translateY(-4px);border-color:rgba(46,134,193,0.35);}
.scene-num{font-size:38px;font-weight:700;color:rgba(46,134,193,0.22);line-height:1;margin-bottom:16px;display:block;}
.scene-card h3{font-size:18px;color:var(--color-primary);font-weight:600;margin-bottom:12px;}
.scene-card p{color:var(--color-text-light);font-size:15px;line-height:1.8;margin-bottom:14px;}
.scene-tags{display:flex;flex-wrap:wrap;gap:6px;}
.scene-tags span{background:rgba(46,134,193,0.1);color:var(--color-secondary);font-size:12px;font-weight:600;padding:3px 10px;border-radius:20px;}

/* ===== Stats ===== */
.stats-section{background:var(--color-dark);padding:64px 0;position:relative;}
.stats-section::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,#00E5FF,transparent);}
.stats-section .section-head h2{color:#fff;}
.stats-section .section-head p{color:var(--color-text-dark-bg);}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.stat-item{text-align:center;background:rgba(255,255,255,0.03);border:1px solid rgba(255,255,255,0.06);border-radius:var(--radius-card);padding:30px 20px;transition:border-color .25s ease,transform .25s ease;}
.stat-item:hover{border-color:rgba(0,229,255,0.3);transform:translateY(-3px);}
.stat-number{font-size:42px;font-weight:700;color:var(--color-accent);text-shadow:0 0 20px rgba(0,229,255,0.35);line-height:1.2;display:block;}
.stat-label{font-size:14px;font-weight:600;color:#fff;margin-top:10px;display:block;}
.stat-desc{font-size:13px;color:var(--color-text-dark-bg);margin-top:6px;line-height:1.6;display:block;}

/* ===== FAQ ===== */
.faq-section{background:var(--color-bg);}
.faq-wrap{max-width:820px;margin:0 auto;}
.accordion{background:transparent;border:0;margin:0;}
.accordion-item{background:#fff;border:1px solid var(--color-border);border-radius:10px;margin-bottom:12px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;border-left:2px solid transparent;}
.accordion-item:hover{border-left-color:var(--color-accent);box-shadow:var(--shadow-card);}
.accordion-item.is-active{border-left-color:var(--color-accent);box-shadow:var(--shadow-card);}
.accordion-title{background:#fff;color:var(--color-primary);font-size:16px;font-weight:600;padding:18px 24px;padding-right:48px;border:0;line-height:1.6;position:relative;}
.accordion-title:hover,.accordion-title:focus{background:#fff;color:var(--color-primary);}
.accordion-title::before{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);font-size:20px;font-weight:400;color:var(--color-secondary);transition:transform .2s ease;background:none;width:auto;height:auto;border:0;margin:0;}
.accordion-item.is-active .accordion-title::before{transform:translateY(-50%) rotate(45deg);color:var(--color-accent);}
.accordion-content{background:#fff;color:var(--color-text-light);padding:0 24px 20px 24px;border:0;line-height:1.85;font-size:15px;}

/* ===== CTA ===== */
.cta-section{background:linear-gradient(135deg,#EAF4FB,#D6EAF7);padding:68px 0;position:relative;overflow:hidden;}
.cta-section::after{content:"";position:absolute;right:-80px;top:-80px;width:260px;height:260px;border-radius:50%;background:rgba(0,229,255,0.08);pointer-events:none;}
.cta-inner{text-align:center;max-width:760px;margin:0 auto;position:relative;z-index:2;}
.cta-inner h2{font-size:30px;font-weight:600;color:var(--color-primary);line-height:1.5;margin-bottom:14px;}
.cta-inner p{font-size:16px;color:var(--color-text-light);margin-bottom:28px;line-height:1.8;}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}

/* ===== Footer ===== */
.site-footer{background:var(--color-dark);position:relative;color:#9FB3C8;padding:56px 0 24px;}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,#00E5FF,transparent);}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px;}
.footer-logo{display:flex;align-items:center;gap:10px;color:#fff;font-size:20px;font-weight:700;margin-bottom:14px;text-shadow:0 0 12px rgba(0,229,255,0.5);}
.footer-brand__desc{font-size:14px;line-height:1.9;color:#9FB3C8;max-width:300px;}
.footer-col__title{color:#fff;font-size:15px;font-weight:600;margin-bottom:18px;letter-spacing:0.5px;}
.footer-links li{margin-bottom:9px;}
.footer-links a{color:#9FB3C8;font-size:14px;text-decoration:none;transition:color .2s ease;padding-left:0;}
.footer-links a:hover{color:#00E5FF;padding-left:4px;}
.footer-contact{list-style:none;margin:0;padding:0;}
.footer-contact li{color:#9FB3C8;font-size:14px;margin-bottom:10px;line-height:1.7;}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;border-top:1px solid rgba(159,179,200,0.15);padding-top:22px;font-size:13px;color:#6C8498;}

/* ===== Reveal Modal ===== */
.reveal{max-width:520px;border-radius:14px;border:0;padding:0!important;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,0.4);background:#fff;position:relative;}
.reveal::before{content:"";display:block;height:3px;background:linear-gradient(90deg,#00E5FF,#2E86C1);}
.modal-header{padding:28px 28px 6px;}
.modal-header h3{font-size:22px;color:var(--color-primary);font-weight:600;margin-bottom:8px;}
.modal-header p{font-size:14px;color:var(--color-text-light);line-height:1.7;margin-bottom:16px;}
.lead-form{padding:6px 28px 28px;}
.lead-form label{display:block;font-size:14px;font-weight:600;color:var(--color-text);margin-bottom:5px;line-height:1.5;}
.lead-form input,.lead-form textarea{width:100%;height:42px;border:1px solid #D5DCE4;border-radius:var(--radius-input);padding:0 12px;margin-bottom:16px;background:#fff;color:var(--color-text);transition:border-color .2s ease,box-shadow .2s ease;box-shadow:0 0 0 0 rgba(46,134,193,0);}
.lead-form textarea{height:92px;padding-top:10px;resize:vertical;}
.lead-form input:focus,.lead-form textarea:focus{border-color:var(--color-secondary);box-shadow:0 0 0 3px rgba(46,134,193,0.12);outline:none;}
.lead-form .btn{margin-top:6px;}
.form-privacy{font-size:12px;color:var(--color-text-light);text-align:center;margin-top:12px;line-height:1.6;}
.close-button{position:absolute;top:18px;right:20px;color:#5B6B7A;font-size:30px;font-weight:300;line-height:1;background:none;border:0;cursor:pointer;transition:color .2s ease,transform .2s ease;z-index:5;}
.close-button:hover{color:var(--color-primary);transform:rotate(90deg);}

/* ===== Responsive ===== */
@media (max-width:1023px){
    .nav-toggle{display:flex;}
    nav.nav-menu{position:absolute;top:64px;left:0;right:0;background:var(--color-dark);display:none;padding:16px 20px 24px;box-shadow:0 16px 30px rgba(0,0,0,0.4);z-index:99;}
    nav.nav-menu.is-open{display:block;}
    nav.nav-menu ul.nav-menu{flex-direction:column;align-items:stretch;gap:4px;}
    .nav__link{border-bottom:0;border-left:2px solid transparent;border-radius:6px;padding:12px 14px;font-size:16px;}
    .nav__link--active{border-left-color:#00E5FF;background:rgba(0,229,255,0.06);}
    .nav-cta{margin:10px 0 0;}
    .nav-cta .btn{width:100%;justify-content:center;}
    .page-hero{padding:70px 0 60px;}
    .page-hero h1{font-size:34px;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
    .section{padding:56px 0;}
    .page-hero{padding:56px 0 48px;}
    .page-hero h1{font-size:28px;line-height:1.4;}
    .page-hero .lead{font-size:16px;}
    .hero-actions .btn{width:100%;justify-content:center;}
    .service-card--wide{flex-direction:column;}
    .service-card--wide .service-card__img{width:100%;min-height:180px;}
    .service-card--wide .service-card__content{padding:24px;}
    .stats-grid{grid-template-columns:1fr 1fr;gap:14px;}
    .stat-item{padding:20px 14px;}
    .stat-number{font-size:30px;}
    .footer-grid{grid-template-columns:1fr;gap:28px;}
    .footer-bottom{flex-direction:column;align-items:flex-start;}
    .section-head h2{font-size:26px;}
    .intro-section h2{font-size:24px;}
    .cta-inner h2{font-size:24px;}
}
@media (max-width:520px){
    .container-custom{padding:0 16px;}
    .nav-logo{font-size:17px;}
    .logo-mark{width:12px;height:12px;}
    .page-hero h1{font-size:24px;}
    .page-hero .lead{font-size:15px;}
    .btn{padding:11px 20px;font-size:15px;}
    .service-card__content h3{font-size:18px;}
    .stats-grid{grid-template-columns:1fr 1fr;}
    .stat-label{font-size:13px;}
    .stat-desc{font-size:12px;line-height:1.5;}
    .accordion-title{font-size:15px;padding:16px 44px 16px 18px;}
    .accordion-title::before{right:16px;}
    .accordion-content{padding:0 18px 16px 18px;}
}