/* roulang page: index */
/* ============ 设计变量 ============ */
        :root {
            --bg-primary: #0d0f1a;
            --bg-secondary: #161a2b;
            --bg-card-hover: #1d2233;
            --bg-footer: #090b14;
            --brand-purple: #7c5cfc;
            --brand-blue: #5a8cff;
            --brand-teal: #2de2b6;
            --text-primary: #e8e9f2;
            --text-secondary: #9da0b8;
            --border-light: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(124, 92, 252, 0.4);
            --tag-bg: rgba(124, 92, 252, 0.15);
            --tag-text: #b8a5ff;
            --warning: #f0b45a;
            --gradient-main: linear-gradient(135deg, #7c5cfc 0%, #5a8cff 50%, #2de2b6 100%);
            --gradient-hover: linear-gradient(225deg, #7c5cfc 0%, #5a8cff 50%, #2de2b6 100%);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --font-num: "DIN Alternate", "Bahnschrift", "Arial Narrow", sans-serif;
            --radius-card: 16px;
            --radius-btn: 12px;
            --radius-tag: 6px;
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 8px 30px rgba(124, 92, 252, 0.25);
            --transition-base: all 0.3s ease;
        }

        /* ============ 基础 reset ============ */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-size: 16px;
            line-height: 1.75;
            overflow-x: hidden;
        }

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

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

        button {
            border: none;
            background: none;
            cursor: pointer;
            font-family: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

        /* 焦点可达性 */
        a:focus-visible,
        button:focus-visible,
        .form-control:focus-visible {
            outline: 2px solid var(--brand-teal);
            outline-offset: 3px;
            border-radius: 4px;
        }

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

        /* ============ 导航栏 ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(13, 15, 26, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition-base);
        }

        .site-header .navbar {
            padding: 14px 0;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .brand-icon {
            width: 40px;
            height: 40px;
            background: var(--gradient-main);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-num);
            font-weight: 800;
            font-size: 20px;
            color: #fff;
            flex-shrink: 0;
            letter-spacing: 0;
            box-shadow: 0 0 18px rgba(124, 92, 252, 0.35);
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .brand-text-main {
            color: #fff;
            font-weight: 700;
            font-size: 18px;
            letter-spacing: 1px;
        }

        .brand-text-sub {
            color: var(--brand-purple);
            font-size: 11px;
            font-weight: 600;
            letter-spacing: 2px;
        }

        .navbar-nav {
            gap: 4px;
        }

        .navbar-nav .nav-link {
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 16px !important;
            border-radius: 8px;
            position: relative;
            transition: var(--transition-base);
        }

        .navbar-nav .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.04);
        }

        .navbar-nav .nav-link.active {
            color: var(--brand-purple);
            font-weight: 600;
        }

        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--brand-teal);
            border-radius: 2px;
        }

        .nav-cta-btn {
            background: var(--gradient-main);
            color: #fff;
            font-weight: 600;
            font-size: 14px;
            padding: 9px 22px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            white-space: nowrap;
            border: none;
        }

        .nav-cta-btn:hover {
            background: var(--gradient-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(124, 92, 252, 0.35);
        }

        .nav-cta-btn:active {
            transform: scale(0.97);
        }

        .navbar-toggler {
            border: 1px solid var(--border-light);
            border-radius: 10px;
            padding: 6px 10px;
        }

        .navbar-toggler:focus {
            box-shadow: none;
            border-color: var(--brand-purple);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255,255,255,0.7)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* ============ Hero 首屏 ============ */
        .hero-section {
            position: relative;
            padding: 90px 0 100px;
            background: var(--bg-primary);
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -20%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(124, 92, 252, 0.3) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -10%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(45, 226, 182, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-section .container-custom {
            position: relative;
            z-index: 2;
        }

        .hero-content {
            padding-right: 30px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(124, 92, 252, 0.12);
            border: 1px solid rgba(124, 92, 252, 0.3);
            color: var(--tag-text);
            padding: 5px 16px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 22px;
        }

        .hero-badge i {
            color: var(--brand-teal);
            font-size: 14px;
        }

        .hero-title {
            font-size: 52px;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: 0.5px;
            color: #fff;
            margin-bottom: 20px;
        }

        .hero-title .gradient-text {
            background: var(--gradient-main);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-subtitle {
            font-size: 18px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 30px;
            max-width: 480px;
        }

        .hero-btns {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }

        .btn-primary-custom {
            background: var(--gradient-main);
            color: #fff;
            font-weight: 600;
            padding: 13px 32px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            border: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-primary-custom:hover {
            background: var(--gradient-hover);
            color: #fff;
            transform: translateY(-3px);
            box-shadow: 0 10px 28px rgba(124, 92, 252, 0.4);
        }

        .btn-primary-custom:active {
            transform: scale(0.97);
        }

        .btn-ghost-custom {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(255, 255, 255, 0.25);
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-weight: 500;
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-ghost-custom:hover {
            border-color: var(--brand-purple);
            color: var(--tag-text);
            background: rgba(124, 92, 252, 0.06);
        }

        .btn-ghost-custom:active {
            transform: scale(0.97);
        }

        .hero-trust {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }

        .trust-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-secondary);
        }

        .trust-item i {
            color: var(--brand-teal);
            font-size: 14px;
        }

        .hero-image-wrap {
            position: relative;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            border: 1px solid var(--border-light);
            background: var(--bg-secondary);
            aspect-ratio: 16 / 10;
        }

        .hero-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .hero-image-wrap:hover img {
            transform: scale(1.03);
        }

        .hero-image-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 20px;
            background: linear-gradient(to top, rgba(13, 15, 26, 0.9) 0%, transparent 100%);
        }

        .hero-image-overlay .status-pill {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(45, 226, 182, 0.15);
            border: 1px solid rgba(45, 226, 182, 0.3);
            color: var(--brand-teal);
            font-size: 13px;
            padding: 4px 14px;
            border-radius: 20px;
        }

        /* ============ 板块通用 ============ */
        .section-block {
            padding: 90px 0;
        }

        .section-head {
            margin-bottom: 48px;
        }

        .section-label {
            color: var(--brand-teal);
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 2px;
            text-transform: uppercase;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .section-label::before {
            content: '';
            width: 22px;
            height: 2px;
            background: var(--brand-teal);
            border-radius: 2px;
        }

        .section-title-custom {
            font-size: 32px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }

        .section-desc {
            color: var(--text-secondary);
            font-size: 16px;
            max-width: 600px;
            line-height: 1.7;
        }

        .section-title-left {
            font-size: 30px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
        }

        /* ============ 核心服务卡片 ============ */
        .service-section {
            background: var(--bg-primary);
            position: relative;
        }

        .service-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 30px 28px;
            height: 100%;
            transition: var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .service-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .service-icon {
            width: 60px;
            height: 60px;
            border-radius: 16px;
            background: var(--gradient-main);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            font-size: 24px;
            color: #fff;
            box-shadow: 0 4px 16px rgba(124, 92, 252, 0.3);
            transition: transform 0.3s ease;
        }

        .service-card:hover .service-icon {
            transform: scale(1.08) rotate(-3deg);
        }

        .service-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 10px;
        }

        .service-card p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.6;
            margin-bottom: 16px;
        }

        .service-link {
            color: var(--tag-text);
            font-size: 14px;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition-base);
        }

        .service-link i {
            transition: transform 0.3s ease;
        }

        .service-link:hover {
            color: var(--brand-teal);
        }

        .service-link:hover i {
            transform: translateX(4px);
        }

        /* ============ 数据徽章 ============ */
        .stats-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
            padding: 70px 0;
        }

        .stat-item {
            text-align: center;
            padding: 20px 10px;
        }

        .stat-number {
            font-family: var(--font-num);
            font-size: 50px;
            font-weight: 800;
            color: var(--brand-teal);
            line-height: 1.1;
            margin-bottom: 8px;
            letter-spacing: 1px;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* ============ 案例/场景板块 ============ */
        .case-section .container-custom {
            max-width: 1200px;
        }

        .case-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin-bottom: 30px;
        }

        .case-card-large {
            background: var(--bg-secondary);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .case-card-large:hover {
            border-color: var(--border-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .case-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background: var(--bg-card-hover);
        }

        .case-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .case-card-large:hover .case-img-wrap img {
            transform: scale(1.05);
        }

        .case-tags {
            position: absolute;
            top: 14px;
            left: 14px;
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .case-tag {
            background: rgba(13, 15, 26, 0.75);
            backdrop-filter: blur(6px);
            color: #fff;
            font-size: 12px;
            font-weight: 500;
            padding: 3px 12px;
            border-radius: 20px;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }

        .case-tag.hot {
            background: rgba(124, 92, 252, 0.55);
            border-color: rgba(124, 92, 252, 0.6);
        }

        .case-body {
            padding: 24px 26px;
            flex: 1;
        }

        .case-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 10px;
        }

        .case-body p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.6;
            margin-bottom: 12px;
        }

        .case-result {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--brand-teal);
            font-size: 13px;
            font-weight: 500;
        }

        /* ============ 解决方案板块 ============ */
        .solution-section {
            background: var(--bg-primary);
            position: relative;
            overflow: hidden;
        }

        .solution-section::before {
            content: '';
            position: absolute;
            top: 30%;
            right: -150px;
            width: 350px;
            height: 350px;
            background: radial-gradient(circle, rgba(90, 140, 255, 0.12) 0%, transparent 70%);
            border-radius: 50%;
        }

        .solution-header {
            padding-right: 30px;
        }

        .solution-item {
            display: flex;
            align-items: flex-start;
            gap: 18px;
            background: var(--bg-secondary);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 24px 24px;
            margin-bottom: 16px;
            transition: var(--transition-base);
        }

        .solution-item:hover {
            border-color: var(--border-hover);
            background: var(--bg-card-hover);
        }

        .solution-num {
            font-family: var(--font-num);
            font-size: 28px;
            font-weight: 700;
            color: var(--brand-purple);
            line-height: 1;
            flex-shrink: 0;
            width: 40px;
            text-align: center;
        }

        .solution-text h4 {
            font-size: 17px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 8px;
        }

        .solution-text p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ============ 最新资讯 CMS 板块 ============ */
        .news-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .news-card {
            background: var(--bg-primary);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 24px 24px;
            height: 100%;
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .news-card:hover {
            border-color: var(--border-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .news-tag {
            display: inline-block;
            background: var(--tag-bg);
            color: var(--tag-text);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: var(--radius-tag);
            margin-bottom: 14px;
            align-self: flex-start;
        }

        .news-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 10px;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            min-height: 54px;
        }

        .news-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 16px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-secondary);
            border-top: 1px solid var(--border-light);
            padding-top: 14px;
        }

        .news-meta time {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .news-read-more {
            color: var(--tag-text);
            font-weight: 500;
            font-size: 13px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .news-read-more:hover {
            color: var(--brand-teal);
        }

        .news-empty {
            border: 2px dashed var(--border-light);
            border-radius: var(--radius-card);
            padding: 50px 30px;
            text-align: center;
            background: rgba(255, 255, 255, 0.01);
        }

        .news-empty i {
            font-size: 40px;
            color: var(--text-secondary);
            opacity: 0.4;
            margin-bottom: 14px;
            display: block;
        }

        .news-empty p {
            color: var(--text-secondary);
            font-size: 15px;
            margin-bottom: 0;
        }

        /* ============ FAQ 手风琴 ============ */
        .faq-section {
            background: var(--bg-primary);
        }

        .faq-accordion .accordion-item {
            background: var(--bg-secondary);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card) !important;
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition-base);
        }

        .faq-accordion .accordion-item:hover {
            border-color: var(--border-hover);
        }

        .faq-accordion .accordion-item[aria-expanded="true"] {
            border-color: var(--brand-purple);
        }

        .faq-accordion .accordion-button {
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 16px;
            padding: 20px 24px;
            box-shadow: none;
            border: none;
            border-radius: var(--radius-card) !important;
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            background: rgba(124, 92, 252, 0.06);
            color: var(--brand-teal);
        }

        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            border-color: var(--brand-purple);
        }

        .faq-accordion .accordion-button::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%239da0b8'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
            transition: transform 0.3s ease;
        }

        .faq-accordion .accordion-button:not(.collapsed)::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%232de2b6'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
        }

        .faq-accordion .accordion-body {
            padding: 0 24px 20px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
            background: transparent;
            border: none;
        }

        /* ============ CTA 横幅 ============ */
        .cta-section {
            background: var(--bg-primary);
            padding: 80px 0;
        }

        .cta-banner {
            background: var(--gradient-main);
            border-radius: 24px;
            padding: 60px 50px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 50%;
        }

        .cta-banner::after {
            content: '';
            position: absolute;
            bottom: -60%;
            left: -10%;
            width: 250px;
            height: 250px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 50%;
        }

        .cta-banner h2 {
            color: #fff;
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }

        .cta-banner p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 16px;
            margin-bottom: 30px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
            position: relative;
            z-index: 1;
            line-height: 1.7;
        }

        .cta-btn-white {
            background: #fff;
            color: var(--brand-purple);
            font-weight: 700;
            padding: 15px 38px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            transition: var(--transition-base);
            position: relative;
            z-index: 1;
            border: none;
            display: inline-block;
        }

        .cta-btn-white:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
            color: var(--brand-purple);
        }

        .cta-btn-white:active {
            transform: scale(0.97);
        }

        .cta-note {
            margin-top: 18px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            position: relative;
            z-index: 1;
        }

        /* ============ 页脚 ============ */
        .site-footer {
            background: var(--bg-footer);
            border-top: 1px solid var(--border-light);
            padding: 60px 0 30px;
        }

        .footer-brand {
            margin-bottom: 20px;
        }

        .footer-brand .navbar-brand {
            margin-bottom: 14px;
        }

        .footer-desc {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 20px;
            max-width: 320px;
        }

        .footer-title {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 2px;
            background: var(--gradient-main);
            border-radius: 2px;
        }

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

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

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

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

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

        .footer-contact-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: var(--text-secondary);
            font-size: 14px;
            margin-bottom: 12px;
        }

        .footer-contact-list li i {
            color: var(--brand-purple);
            margin-top: 3px;
        }

        .footer-disclaimer {
            border-top: 1px solid var(--border-light);
            margin-top: 40px;
            padding-top: 24px;
            font-size: 13px;
            color: rgba(157, 160, 184, 0.6);
            text-align: center;
            line-height: 1.6;
        }

        .footer-copyright {
            font-size: 14px;
            color: var(--text-secondary);
            text-align: center;
            margin-top: 12px;
        }

        .footer-copyright a {
            color: var(--tag-text);
        }

        .footer-copyright a:hover {
            color: var(--brand-teal);
        }

        /* ============ 响应式断点 ============ */
        @media (max-width: 991.98px) {
            .hero-section {
                padding: 60px 0 70px;
            }

            .hero-title {
                font-size: 40px;
            }

            .hero-content {
                padding-right: 0;
                margin-bottom: 40px;
            }

            .section-block {
                padding: 70px 0;
            }

            .section-title-custom {
                font-size: 28px;
            }

            .case-row {
                grid-template-columns: 1fr;
            }

            .navbar-collapse {
                background: var(--bg-secondary);
                border-radius: 16px;
                padding: 16px;
                margin-top: 12px;
                border: 1px solid var(--border-light);
            }

            .navbar-nav .nav-link.active::after {
                display: none;
            }

            .nav-cta-btn {
                margin-top: 12px;
                width: 100%;
                text-align: center;
            }

            .strategy-header {
                margin-bottom: 30px;
            }
        }

        @media (max-width: 767.98px) {
            body {
                font-size: 15px;
            }

            .container-custom {
                padding: 0 16px;
            }

            .hero-section {
                padding: 50px 0 60px;
            }

            .hero-title {
                font-size: 31px;
                line-height: 1.25;
            }

            .hero-subtitle {
                font-size: 16px;
            }

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

            .btn-primary-custom,
            .btn-ghost-custom {
                width: 100%;
                justify-content: center;
                text-align: center;
            }

            .hero-trust {
                gap: 10px;
            }

            .section-block {
                padding: 56px 0;
            }

            .section-title-custom {
                font-size: 24px;
            }

            .section-desc {
                font-size: 15px;
            }

            .service-card {
                padding: 24px 20px;
                margin-bottom: 16px;
            }

            .stat-number {
                font-size: 40px;
            }

            .stat-item {
                padding: 14px 4px;
            }

            .case-body {
                padding: 18px 18px;
            }

            .solution-item {
                padding: 20px 16px;
                gap: 12px;
            }

            .solution-num {
                font-size: 22px;
                width: 30px;
            }

            .cta-banner {
                padding: 40px 24px;
                border-radius: 18px;
            }

            .cta-banner h2 {
                font-size: 24px;
            }

            .cta-banner p {
                font-size: 14px;
            }

            .cta-btn-white {
                width: 100%;
                padding: 14px 30px;
                font-size: 15px;
                text-align: center;
            }

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

            .footer-title {
                margin-top: 24px;
            }

            .footer-disclaimer {
                text-align: left;
                padding: 18px 4px 0;
            }
        }

        @media (max-width: 520px) {
            .hero-badge {
                font-size: 12px;
                padding: 4px 12px;
            }

            .brand-text-main {
                font-size: 16px;
            }

            .brand-text-sub {
                font-size: 10px;
            }

            .brand-icon {
                width: 36px;
                height: 36px;
                font-size: 18px;
            }

            .stat-number {
                font-size: 34px;
            }

            .stat-label {
                font-size: 13px;
            }

            .section-title-custom {
                font-size: 22px;
            }

            .section-title-left {
                font-size: 22px;
            }

            .case-tags {
                top: 10px;
                left: 10px;
            }

            .case-tag {
                font-size: 11px;
                padding: 2px 10px;
            }

            .news-card h3 {
                font-size: 16px;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #0d0f1a;
            --bg-secondary: #161a2b;
            --bg-card-hover: #1d2233;
            --brand-primary: #7c5cfc;
            --brand-accent: #2de2b6;
            --brand-gradient: linear-gradient(135deg, #7c5cfc 0%, #5a8cff 50%, #2de2b6 100%);
            --text-primary: #e8e9f2;
            --text-secondary: #9da0b8;
            --text-muted: #6b7089;
            --border-color: rgba(255, 255, 255, 0.08);
            --tag-bg: rgba(124, 92, 252, 0.15);
            --tag-text: #b8a5ff;
            --data-number: #2de2b6;
            --footer-bg: #090b14;
            --warning: #f0b45a;
            --radius-card: 16px;
            --radius-btn: 12px;
            --radius-tag: 6px;
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 8px 30px rgba(124, 92, 252, 0.25);
            --spacer-section: 80px;
            --font-cn: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --font-num: "DIN Alternate", "Bahnschrift", "Arial Narrow", sans-serif;
        }

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

        body {
            font-family: var(--font-cn);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--text-primary);
            text-decoration: none;
            transition: color .25s ease;
        }

        a:hover {
            color: var(--brand-accent);
        }

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

        button,
        input {
            font-family: inherit;
        }

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

        /* ===== 导航栏 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(13, 15, 26, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
        }

        .site-header .navbar {
            padding-top: 16px;
            padding-bottom: 16px;
        }

        .navbar-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-right: 0;
        }

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: var(--brand-gradient);
            color: #fff;
            font-weight: 800;
            font-size: 15px;
            letter-spacing: 0.5px;
            font-family: var(--font-num);
            box-shadow: 0 4px 14px rgba(124, 92, 252, 0.4);
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .brand-text-main {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 1px;
        }

        .brand-text-sub {
            font-size: 12px;
            color: var(--text-secondary);
            letter-spacing: 2px;
        }

        .navbar-nav {
            gap: 4px;
            align-items: center;
        }

        .navbar-nav .nav-link {
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 8px;
            position: relative;
            transition: color .25s ease, background .25s ease;
        }

        .navbar-nav .nav-link:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
        }

        .navbar-nav .nav-link.active {
            color: var(--brand-primary);
            font-weight: 600;
        }

        .navbar-nav .nav-link.active::after {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 0;
            height: 2px;
            background: var(--brand-accent);
            border-radius: 2px;
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 22px;
            background: var(--brand-gradient);
            color: #fff;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 14px;
            white-space: nowrap;
            border: none;
            cursor: pointer;
            transition: all .3s ease;
            box-shadow: 0 4px 16px rgba(124, 92, 252, 0.3);
        }

        .nav-cta-btn:hover {
            filter: brightness(1.1);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 8px 28px rgba(124, 92, 252, 0.4);
        }

        .nav-cta-btn:active {
            transform: scale(0.97);
        }

        .navbar-toggler {
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 6px 10px;
            background: transparent;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(124, 92, 252, 0.25);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255,255,255,0.7)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* ===== 面包屑 ===== */
        .article-breadcrumb {
            padding: 24px 0 0;
            background: var(--bg-primary);
        }

        .breadcrumb {
            margin-bottom: 0;
            flex-wrap: wrap;
        }

        .breadcrumb-item {
            font-size: 13px;
            color: var(--text-secondary);
        }

        .breadcrumb-item a {
            color: var(--text-secondary);
        }

        .breadcrumb-item a:hover {
            color: var(--brand-accent);
        }

        .breadcrumb-item.active {
            color: var(--text-muted);
            max-width: 320px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .breadcrumb-item + .breadcrumb-item::before {
            color: var(--brand-primary);
            content: "/";
            opacity: 0.6;
        }

        /* ===== 文章头部 ===== */
        .article-header {
            position: relative;
            padding: 60px 0 44px;
            background: linear-gradient(rgba(13, 15, 26, 0.82), rgba(13, 15, 26, 0.94)), url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
            border-bottom: 1px solid var(--border-color);
        }

        .article-header-inner {
            max-width: 860px;
            margin: 0 auto;
            text-align: center;
        }

        .article-category-badge {
            display: inline-block;
            background: var(--tag-bg);
            color: var(--tag-text);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: var(--radius-tag);
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }

        .article-header-inner h1 {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.35;
            letter-spacing: 0.5px;
            color: var(--text-primary);
            margin-bottom: 18px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 22px;
            color: var(--text-secondary);
            font-size: 13px;
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta i {
            color: var(--brand-accent);
            font-size: 14px;
        }

        /* ===== 正文区 ===== */
        .article-body {
            padding: 56px 0 48px;
        }

        .article-content-wrap {
            max-width: 760px;
            margin: 0 auto;
        }

        .article-content {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-primary);
        }

        .article-content p {
            margin-bottom: 1.5em;
        }

        .article-content > p:first-child {
            font-size: 18px;
            color: rgba(232, 233, 242, 0.92);
        }

        .article-content h2,
        .article-content h3,
        .article-content h4 {
            font-weight: 700;
            color: var(--text-primary);
            margin: 1.8em 0 0.8em;
            padding-left: 14px;
            border-left: 3px solid var(--brand-primary);
            line-height: 1.4;
        }

        .article-content h2 {
            font-size: 26px;
        }

        .article-content h3 {
            font-size: 20px;
        }

        .article-content h4 {
            font-size: 18px;
        }

        .article-content blockquote {
            border-left: 3px solid var(--brand-accent);
            background: var(--bg-secondary);
            padding: 18px 22px;
            border-radius: 0 12px 12px 0;
            margin: 1.5em 0;
            color: var(--text-secondary);
            font-style: italic;
        }

        .article-content ul,
        .article-content ol {
            margin: 1.2em 0 1.5em;
            padding-left: 1.4em;
        }

        .article-content li {
            margin-bottom: 0.6em;
        }

        .article-content ul li::marker {
            color: var(--brand-primary);
        }

        .article-content img {
            border-radius: 12px;
            margin: 1.5em 0;
            box-shadow: var(--shadow-card);
        }

        .article-content figcaption {
            text-align: center;
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: -1em;
            margin-bottom: 1.5em;
        }

        .article-content pre {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 18px;
            overflow-x: auto;
            color: var(--text-primary);
            font-family: "SFMono-Regular", Consolas, monospace;
            font-size: 14px;
            margin: 1.5em 0;
        }

        .article-content code {
            color: var(--brand-accent);
        }

        .article-content a {
            color: var(--brand-primary);
            border-bottom: 1px solid rgba(124, 92, 252, 0.4);
        }

        .article-content a:hover {
            color: var(--brand-accent);
            border-bottom-color: var(--brand-accent);
        }

        /* ===== 未找到 ===== */
        .article-not-found {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-secondary);
            border: 1px dashed var(--border-color);
            border-radius: var(--radius-card);
        }

        .not-found-icon {
            font-size: 48px;
            color: var(--brand-primary);
            margin-bottom: 16px;
        }

        .not-found-icon i {
            font-size: 52px;
        }

        .article-not-found h3 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .article-not-found p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        .btn-back-home {
            display: inline-block;
            padding: 12px 32px;
            background: var(--brand-gradient);
            color: #fff;
            border-radius: var(--radius-btn);
            font-weight: 600;
            transition: all .3s ease;
        }

        .btn-back-home:hover {
            filter: brightness(1.1);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        /* ===== 标签区 ===== */
        .article-tags {
            padding: 16px 0 28px;
            border-bottom: 1px solid var(--border-color);
        }

        .tags-wrap {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
        }

        .tag-label {
            font-size: 14px;
            color: var(--text-secondary);
            margin-right: 4px;
        }

        .tag-item {
            display: inline-block;
            background: var(--tag-bg);
            color: var(--tag-text);
            font-size: 13px;
            padding: 5px 14px;
            border-radius: var(--radius-tag);
            transition: all .25s ease;
            border: 1px solid transparent;
        }

        .tag-item:hover {
            background: rgba(124, 92, 252, 0.28);
            color: #fff;
            border-color: var(--brand-primary);
        }

        /* ===== 返回列表 ===== */
        .article-back {
            padding: 28px 0 0;
        }

        .article-back .container-custom {
            max-width: 760px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .btn-back-list {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--border-color);
            transition: all .3s ease;
            background: transparent;
        }

        .btn-back-list:hover {
            color: var(--brand-accent);
            border-color: var(--brand-accent);
            background: rgba(45, 226, 182, 0.06);
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 56px 0 80px;
            background: var(--bg-primary);
        }

        .section-head {
            text-align: center;
            margin-bottom: 40px;
        }

        .section-eyebrow {
            display: inline-block;
            font-size: 13px;
            color: var(--brand-accent);
            letter-spacing: 3px;
            text-transform: uppercase;
            margin-bottom: 8px;
            font-weight: 600;
        }

        .section-head h2 {
            font-size: 30px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .section-head p {
            color: var(--text-secondary);
            font-size: 15px;
            margin-bottom: 0;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            display: flex;
            flex-direction: column;
            background: var(--bg-secondary);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
        }

        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(124, 92, 252, 0.4);
        }

        .related-card-img {
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background: var(--bg-card-hover);
        }

        .related-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }

        .related-card:hover .related-card-img img {
            transform: scale(1.04);
        }

        .related-card-body {
            padding: 20px 22px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .related-card-cat {
            display: inline-block;
            background: var(--tag-bg);
            color: var(--tag-text);
            font-size: 12px;
            padding: 3px 10px;
            border-radius: var(--radius-tag);
            margin-bottom: 12px;
            align-self: flex-start;
            letter-spacing: 0.5px;
        }

        .related-card-title {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 14px;
            color: var(--text-primary);
            transition: color .25s ease;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card:hover .related-card-title {
            color: var(--brand-accent);
        }

        .related-card-time {
            margin-top: auto;
            font-size: 13px;
            color: var(--text-muted);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--footer-bg);
            border-top: 1px solid var(--border-color);
            padding-top: 64px;
        }

        .footer-brand {
            margin-bottom: 18px;
        }

        .footer-desc {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 20px;
            max-width: 320px;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }

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

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

        .footer-links a {
            color: var(--text-secondary);
            font-size: 14px;
            transition: color .25s ease;
        }

        .footer-links a:hover {
            color: var(--brand-accent);
        }

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

        .footer-contact-list li {
            color: var(--text-secondary);
            font-size: 14px;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-contact-list i {
            color: var(--brand-accent);
            font-size: 15px;
        }

        .footer-disclaimer {
            margin-top: 44px;
            padding: 18px 0;
            border-top: 1px solid var(--border-color);
            color: var(--text-muted);
            font-size: 13px;
            text-align: center;
            line-height: 1.6;
        }

        .footer-copyright {
            padding: 18px 0 28px;
            text-align: center;
            color: var(--text-secondary);
            font-size: 14px;
        }

        .footer-copyright a {
            color: var(--text-secondary);
        }

        .footer-copyright a:hover {
            color: var(--brand-accent);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991.98px) {
            :root {
                --spacer-section: 56px;
            }

            .navbar-nav {
                gap: 2px;
                padding-top: 12px;
                padding-bottom: 12px;
            }

            .navbar-nav .nav-link {
                padding: 10px 14px;
                font-size: 15px;
            }

            .navbar-nav .nav-link.active::after {
                left: 14px;
                right: auto;
                width: 28px;
            }

            .nav-cta-btn {
                margin-left: 0;
                margin-top: 10px;
                width: 100%;
                padding: 12px 20px;
            }

            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .article-header-inner h1 {
                font-size: 32px;
            }
        }

        @media (max-width: 767.98px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }

            .article-header {
                padding: 44px 0 32px;
            }

            .article-header-inner h1 {
                font-size: 28px;
                line-height: 1.4;
            }

            .article-meta {
                gap: 12px;
                font-size: 12px;
                flex-direction: row;
                flex-wrap: wrap;
                justify-content: center;
            }

            .article-body {
                padding: 40px 0 32px;
            }

            .article-content {
                font-size: 15px;
                line-height: 1.8;
            }

            .article-content h2 {
                font-size: 22px;
            }

            .article-content h3 {
                font-size: 18px;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .related-card {
                flex-direction: column;
            }

            .related-card-img {
                width: 100%;
                aspect-ratio: 16 / 9;
            }

            .section-head h2 {
                font-size: 26px;
            }

            .tags-wrap {
                gap: 8px;
            }

            .tag-item {
                font-size: 12px;
                padding: 4px 10px;
            }

            .breadcrumb-item.active {
                max-width: 200px;
            }

            .footer-title {
                margin-top: 16px;
            }

            .footer-disclaimer {
                margin-top: 28px;
                font-size: 12px;
            }

            .footer-contact-list li {
                font-size: 13px;
            }
        }

        @media (max-width: 575.98px) {
            .brand-text-main {
                font-size: 18px;
            }

            .brand-text-sub {
                font-size: 11px;
            }

            .article-meta {
                flex-direction: column;
                align-items: center;
                gap: 6px;
            }

            .article-meta span {
                font-size: 12px;
            }

            .article-header-inner h1 {
                font-size: 24px;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .related-card-title {
                font-size: 16px;
            }

            .article-back .btn-back-list {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0d0f1a;
            --bg-secondary: #161a2b;
            --bg-hover: #1d2233;
            --bg-footer: #090b14;
            --brand-purple: #7c5cfc;
            --brand-cyan: #2de2b6;
            --gradient-main: linear-gradient(135deg, #7c5cfc 0%, #5a8cff 50%, #2de2b6 100%);
            --text-main: #e8e9f2;
            --text-muted: #9da0b8;
            --border-light: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(124, 92, 252, 0.45);
            --tag-bg: rgba(124, 92, 252, 0.15);
            --tag-text: #b8a5ff;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 8px 30px rgba(124, 92, 252, 0.25);
            --font-cn: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --font-num: "DIN Alternate", "Bahnschrift", "Arial Narrow", sans-serif;
            --container-w: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-cn);
            background-color: var(--bg-primary);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--brand-purple);
            text-decoration: none;
            transition: color .25s ease;
        }

        a:hover {
            color: var(--brand-cyan);
        }

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

        ul,
        ol {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .container-custom {
            max-width: var(--container-w);
            margin: 0 auto;
            padding: 0 20px;
        }

        .btn {
            border-radius: var(--radius-md);
            font-weight: 600;
            padding: 12px 28px;
            border: none;
            transition: all .25s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .btn-primary {
            background: var(--gradient-main);
            color: #fff;
        }

        .btn-primary:hover {
            background: linear-gradient(315deg, #7c5cfc, #5a8cff, #2de2b6);
            color: #fff;
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: scale(0.97);
        }

        .btn-ghost {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: var(--text-main);
        }

        .btn-ghost:hover {
            border-color: var(--brand-purple);
            color: var(--brand-purple);
            box-shadow: var(--shadow-card);
            transform: translateY(-2px);
        }

        .rounded-custom {
            border-radius: var(--radius-lg);
        }

        .shadow-custom {
            box-shadow: var(--shadow-card);
        }

        .section-block {
            padding: 90px 0;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--brand-cyan);
            letter-spacing: 2px;
            text-transform: uppercase;
            margin-bottom: 10px;
            position: relative;
            padding-left: 16px;
        }

        .section-label::before {
            content: "";
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--brand-cyan);
            box-shadow: 0 0 10px rgba(45, 226, 182, 0.6);
        }

        .section-label-center {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--brand-cyan);
            letter-spacing: 2px;
            text-transform: uppercase;
            margin-bottom: 10px;
        }

        .section-label-center::before,
        .section-label-center::after {
            content: "";
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--brand-cyan);
            box-shadow: 0 0 10px rgba(45, 226, 182, 0.6);
        }

        .section-head {
            margin-bottom: 48px;
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 700;
            margin-top: 8px;
            margin-bottom: 10px;
            letter-spacing: 0.5px;
        }

        .section-head p {
            color: var(--text-muted);
            font-size: 16px;
            max-width: 620px;
            margin: 0 auto;
        }

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

        /* ===== 导航栏 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(13, 15, 26, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            transition: background .3s ease;
        }

        .site-header .navbar {
            padding: 16px 0;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-right: 0;
            padding: 0;
            font-size: 0;
        }

        .brand-icon {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: var(--gradient-main);
            color: #fff;
            font-family: var(--font-num);
            font-size: 18px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            letter-spacing: 0;
            box-shadow: 0 4px 14px rgba(124, 92, 252, 0.4);
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .brand-text-main {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: 0.5px;
        }

        .brand-text-sub {
            font-size: 12px;
            font-weight: 600;
            color: var(--brand-purple);
            letter-spacing: 2px;
        }

        .navbar-nav .nav-link {
            color: var(--text-muted);
            font-weight: 500;
            padding: 10px 18px;
            font-size: 15px;
            position: relative;
            transition: color .25s ease;
        }

        .navbar-nav .nav-link:hover {
            color: var(--text-main);
        }

        .navbar-nav .nav-link.active {
            color: var(--brand-purple);
        }

        .navbar-nav .nav-link.active::after {
            content: "";
            position: absolute;
            left: 18px;
            right: 18px;
            bottom: 4px;
            height: 2px;
            background: var(--brand-cyan);
            border-radius: 2px;
            box-shadow: 0 0 8px rgba(45, 226, 182, 0.5);
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 9px 22px;
            border-radius: var(--radius-md);
            background: var(--gradient-main);
            color: #fff;
            font-weight: 600;
            font-size: 14px;
            border: none;
            transition: all .25s ease;
            box-shadow: 0 4px 14px rgba(124, 92, 252, 0.35);
            white-space: nowrap;
        }

        .nav-cta-btn:hover {
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(124, 92, 252, 0.5);
        }

        .navbar-toggler {
            border: 1px solid var(--border-light);
            border-radius: 8px;
            padding: 6px 10px;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(124, 92, 252, 0.3);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(232,233,242,0.85)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* ===== 分类页 Hero ===== */
        .category-hero {
            position: relative;
            padding: 90px 0 80px;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            border-bottom: 1px solid var(--border-light);
        }

        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(13, 15, 26, 0.96) 0%, rgba(13, 15, 26, 0.82) 55%, rgba(13, 15, 26, 0.55) 100%);
            z-index: 1;
        }

        .category-hero::after {
            content: "";
            position: absolute;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(124, 92, 252, 0.35) 0%, transparent 70%);
            top: -120px;
            right: -80px;
            z-index: 1;
        }

        .category-hero .container-custom {
            position: relative;
            z-index: 2;
        }

        .breadcrumb-nav {
            margin-bottom: 22px;
        }

        .breadcrumb-nav .breadcrumb {
            margin-bottom: 0;
        }

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

        .breadcrumb-nav .breadcrumb-item a {
            color: var(--text-muted);
        }

        .breadcrumb-nav .breadcrumb-item a:hover {
            color: var(--brand-cyan);
        }

        .breadcrumb-nav .breadcrumb-item.active {
            color: var(--brand-purple);
        }

        .breadcrumb-nav .breadcrumb-item+.breadcrumb-item::before {
            color: rgba(255, 255, 255, 0.3);
        }

        .category-hero h1 {
            font-size: 44px;
            font-weight: 700;
            letter-spacing: 0.5px;
            margin-bottom: 14px;
            color: var(--text-main);
            position: relative;
        }

        .category-hero h1::after {
            content: "";
            display: block;
            width: 64px;
            height: 3px;
            border-radius: 2px;
            background: var(--gradient-main);
            margin-top: 16px;
            box-shadow: 0 0 12px rgba(124, 92, 252, 0.6);
        }

        .category-hero .hero-sub {
            font-size: 17px;
            color: var(--text-muted);
            max-width: 540px;
            margin-bottom: 22px;
        }

        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--tag-bg);
            border: 1px solid rgba(124, 92, 252, 0.25);
            color: var(--tag-text);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 20px;
        }

        .hero-tag::before {
            content: "●";
            font-size: 8px;
            color: var(--brand-cyan);
        }

        /* ===== 分类介绍 ===== */
        .category-about {
            position: relative;
        }

        .category-about h2 {
            font-size: 30px;
            font-weight: 700;
            margin-bottom: 18px;
        }

        .category-about .lead-copy {
            font-size: 17px;
            color: var(--text-muted);
            margin-bottom: 16px;
        }

        .about-points {
            margin-top: 24px;
        }

        .about-points li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            margin-bottom: 14px;
            color: var(--text-main);
            font-size: 15px;
        }

        .about-points i {
            color: var(--brand-cyan);
            font-size: 18px;
            line-height: 1.6;
        }

        .category-about .about-image {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            position: relative;
        }

        .category-about .about-image::after {
            content: "";
            position: absolute;
            inset: 0;
            border: 1px solid var(--border-hover);
            border-radius: var(--radius-lg);
            pointer-events: none;
        }

        .category-about .about-image img {
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
            display: block;
        }

        /* ===== 内容方向卡片 ===== */
        .game-directions {
            background: linear-gradient(180deg, rgba(22, 26, 43, 0.65) 0%, rgba(13, 15, 26, 0) 100%);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .direction-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            height: 100%;
            transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
            position: relative;
            overflow: hidden;
        }

        .direction-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--gradient-main);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform .35s ease;
        }

        .direction-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border-hover);
        }

        .direction-card:hover::before {
            transform: scaleX(1);
        }

        .direction-icon {
            width: 60px;
            height: 60px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: #fff;
            background: var(--gradient-main);
            margin-bottom: 18px;
            box-shadow: 0 4px 14px rgba(124, 92, 252, 0.35);
        }

        .direction-card h3 {
            font-size: 19px;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .direction-card p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.65;
            margin-bottom: 0;
        }

        /* ===== 热门内容推荐 ===== */
        .hot-recommend .recommend-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            height: 100%;
            transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
        }

        .recommend-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border-hover);
        }

        .recommend-thumb {
            position: relative;
            aspect-ratio: 4 / 3;
            overflow: hidden;
        }

        .recommend-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }

        .recommend-card:hover .recommend-thumb img {
            transform: scale(1.05);
        }

        .recommend-thumb::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(13, 15, 26, 0) 55%, rgba(13, 15, 26, 0.45) 100%);
        }

        .recommend-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--tag-bg);
            border: 1px solid rgba(124, 92, 252, 0.3);
            color: var(--tag-text);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            z-index: 2;
            backdrop-filter: blur(6px);
        }

        .recommend-body {
            padding: 22px 24px 26px;
        }

        .recommend-body h3 {
            font-size: 19px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .recommend-body p {
            color: var(--text-muted);
            font-size: 14px;
            margin-bottom: 14px;
            line-height: 1.65;
        }

        .recommend-link {
            color: var(--brand-purple);
            font-size: 14px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap .25s ease, color .25s ease;
        }

        .recommend-link:hover {
            color: var(--brand-cyan);
            gap: 10px;
        }

        /* ===== 流程 ===== */
        .step-flow {
            background: radial-gradient(ellipse at 50% 0%, rgba(124, 92, 252, 0.12) 0%, transparent 60%);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .step-card {
            position: relative;
            background: var(--bg-secondary);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 30px 26px;
            height: 100%;
            text-align: center;
            transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
        }

        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border-hover);
        }

        .step-num {
            font-family: var(--font-num);
            font-size: 46px;
            font-weight: 800;
            color: transparent;
            -webkit-text-stroke: 1.5px var(--brand-cyan);
            display: block;
            margin-bottom: 12px;
            line-height: 1;
            letter-spacing: 1px;
        }

        .step-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .step-card p {
            color: var(--text-muted);
            font-size: 14px;
            margin-bottom: 0;
            line-height: 1.65;
        }

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

        .accordion-item {
            background: var(--bg-secondary);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color .3s ease, box-shadow .3s ease;
        }

        .accordion-item:has(.accordion-button:not(.collapsed)) {
            border-color: var(--border-hover);
            box-shadow: 0 4px 16px rgba(124, 92, 252, 0.12);
        }

        .accordion-button {
            background: var(--bg-secondary);
            color: var(--text-main);
            font-weight: 600;
            font-size: 16px;
            padding: 20px 24px;
            transition: background .3s ease, color .3s ease;
            box-shadow: none;
        }

        .accordion-button:not(.collapsed) {
            background: rgba(124, 92, 252, 0.12);
            color: var(--brand-purple);
        }

        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(124, 92, 252, 0.25);
            border-color: var(--border-hover);
        }

        .accordion-button::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23e8e9f2'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
            background-size: 1rem;
            transition: transform .3s ease;
        }

        .accordion-button:not(.collapsed)::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%237c5cfc'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
        }

        .accordion-body {
            padding: 4px 24px 22px;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.7;
            border-top: 1px solid var(--border-light);
            background: rgba(13, 15, 26, 0.3);
        }

        /* ===== CTA ===== */
        .cta-section {
            padding-bottom: 90px;
        }

        .cta-banner {
            background: var(--gradient-main);
            border-radius: 20px;
            text-align: center;
            padding: 60px 48px;
            position: relative;
            overflow: hidden;
            box-shadow: 0 12px 40px rgba(90, 92, 252, 0.35);
        }

        .cta-banner::before {
            content: "";
            position: absolute;
            top: -80%;
            left: -15%;
            width: 480px;
            height: 480px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-banner::after {
            content: "";
            position: absolute;
            bottom: -70%;
            right: -10%;
            width: 360px;
            height: 360px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-banner .cta-inner {
            position: relative;
            z-index: 2;
        }

        .cta-banner h2 {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .cta-banner p {
            color: rgba(255, 255, 255, 0.92);
            font-size: 16px;
            margin-bottom: 26px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-banner .btn-white {
            background: #fff;
            color: var(--brand-purple);
            padding: 13px 34px;
            border-radius: var(--radius-md);
            font-weight: 700;
            transition: all .25s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .cta-banner .btn-white:hover {
            background: var(--bg-primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
        }

        .cta-note {
            color: rgba(255, 255, 255, 0.85);
            font-size: 13px;
            margin-top: 14px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-footer);
            border-top: 1px solid var(--border-light);
            padding: 70px 0 30px;
        }

        .site-footer .footer-brand {
            margin-bottom: 20px;
        }

        .site-footer .navbar-brand {
            display: inline-flex;
        }

        .footer-desc {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
            max-width: 340px;
            margin-bottom: 0;
        }

        .footer-title {
            color: var(--text-main);
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-title::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 30px;
            height: 2px;
            background: var(--gradient-main);
            border-radius: 2px;
        }

        .footer-links {
            padding: 0;
        }

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

        .footer-links a {
            color: var(--text-muted);
            font-size: 14px;
            transition: color .25s ease, padding-left .25s ease;
            display: inline-block;
        }

        .footer-links a:hover {
            color: var(--brand-cyan);
            padding-left: 6px;
        }

        .footer-contact-list {
            padding: 0;
        }

        .footer-contact-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-muted);
            font-size: 14px;
            margin-bottom: 12px;
        }

        .footer-contact-list i {
            color: var(--brand-purple);
            font-size: 14px;
        }

        .footer-disclaimer {
            border-top: 1px solid var(--border-light);
            margin-top: 48px;
            padding-top: 24px;
            color: var(--text-muted);
            font-size: 13px;
            line-height: 1.8;
            text-align: center;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }

        .footer-copyright {
            text-align: center;
            padding-top: 20px;
            color: var(--text-muted);
            font-size: 13px;
        }

        .footer-copyright a {
            color: var(--text-main);
        }

        .footer-copyright a:hover {
            color: var(--brand-cyan);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991.98px) {
            .navbar-collapse {
                padding: 18px 0 8px;
                border-top: 1px solid var(--border-light);
                margin-top: 14px;
            }

            .navbar-nav .nav-link {
                padding: 12px 0;
                font-size: 15px;
            }

            .navbar-nav .nav-link.active::after {
                left: 0;
                right: 0;
                bottom: 6px;
            }

            .nav-cta-btn {
                margin: 14px 0 6px;
                width: 100%;
                justify-content: center;
                padding: 11px 20px;
            }

            .category-hero {
                padding: 70px 0 60px;
            }

            .category-hero h1 {
                font-size: 36px;
            }

            .section-block {
                padding: 72px 0;
            }

            .category-about .about-image {
                margin-top: 30px;
            }
        }

        @media (max-width: 767.98px) {
            .section-block {
                padding: 56px 0;
            }

            .section-head {
                margin-bottom: 36px;
            }

            .section-head h2 {
                font-size: 26px;
            }

            .category-hero {
                padding: 54px 0 48px;
            }

            .category-hero h1 {
                font-size: 30px;
            }

            .category-hero .hero-sub {
                font-size: 15px;
            }

            .category-about h2 {
                font-size: 24px;
            }

            .btn-primary,
            .btn-ghost,
            .btn-white {
                width: 100%;
                max-width: 320px;
            }

            .direction-card {
                padding: 24px 20px;
            }

            .step-card {
                padding: 26px 20px;
            }

            .step-num {
                font-size: 38px;
            }

            .cta-section {
                padding: 0 0 56px;
            }

            .cta-banner {
                padding: 44px 22px;
                border-radius: 16px;
            }

            .cta-banner h2 {
                font-size: 22px;
            }

            .cta-banner p {
                font-size: 14px;
            }

            .site-footer {
                padding-top: 56px;
            }

            .footer-disclaimer {
                margin-top: 36px;
            }
        }

        @media (max-width: 575.98px) {
            .category-hero h1 {
                font-size: 26px;
            }

            .hero-tag {
                font-size: 12px;
                padding: 5px 10px;
            }

            .brand-text-main {
                font-size: 18px;
            }

            .brand-text-sub {
                font-size: 11px;
            }

            .brand-icon {
                width: 38px;
                height: 38px;
                font-size: 16px;
            }

            .section-head h2 {
                font-size: 23px;
            }

            .recommend-body {
                padding: 18px 18px 22px;
            }

            .cta-banner {
                padding: 36px 18px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0d0f1a;
            --bg-secondary: #161a2b;
            --bg-card-hover: #1d2233;
            --bg-footer: #090b14;
            --brand-purple: #7c5cfc;
            --brand-blue: #5a8cff;
            --brand-cyan: #2de2b6;
            --text-primary: #e8e9f2;
            --text-secondary: #9da0b8;
            --text-light: #b8a5ff;
            --border-light: rgba(255, 255, 255, 0.08);
            --gradient-brand: linear-gradient(135deg, #7c5cfc 0%, #5a8cff 50%, #2de2b6 100%);
            --radius-sm: 6px;
            --radius-md: 14px;
            --radius-lg: 16px;
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 8px 30px rgba(124, 92, 252, 0.25);
            --transition-base: all 0.3s ease;
            --font-sans: "PingFang SC", "Microsooft YaHei", "Helvetica Neue", Arial, sans-serif;
            --font-num: "DIN Alternate", "Bahnschrift", "Arial Narrow", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            background: var(--bg-primary);
            color: var(--text-primary);
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button {
            font-family: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

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

        /* ===== 导航栏 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(13, 15, 26, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            padding: 12px 0;
            transition: var(--transition-base);
        }

        .site-header .navbar {
            padding: 0;
        }

        .navbar-brand {
            display: inline-flex;
            align-items: center;
            margin: 0;
        }

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--gradient-brand);
            color: #fff;
            font-weight: 800;
            font-size: 15px;
            letter-spacing: 0.5px;
            margin-right: 10px;
            flex-shrink: 0;
            box-shadow: 0 2px 12px rgba(124, 92, 252, 0.35);
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .brand-text-main {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.5px;
        }

        .brand-text-sub {
            font-size: 12px;
            color: var(--brand-purple);
            letter-spacing: 1px;
            font-weight: 500;
        }

        .navbar-nav .nav-link {
            color: var(--text-secondary);
            font-weight: 500;
            padding: 8px 16px;
            font-size: 15px;
            position: relative;
            border-radius: 6px;
        }

        .navbar-nav .nav-link:hover {
            color: var(--brand-purple);
        }

        .navbar-nav .nav-link.active {
            color: var(--brand-purple);
        }

        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 2px;
            height: 2px;
            background: var(--brand-cyan);
            border-radius: 2px;
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--gradient-brand);
            color: #fff;
            border-radius: 12px;
            padding: 8px 20px;
            font-weight: 600;
            font-size: 14px;
            border: none;
            white-space: nowrap;
            box-shadow: 0 2px 10px rgba(124, 92, 252, 0.3);
        }

        .nav-cta-btn:hover {
            color: #fff;
            box-shadow: 0 4px 24px rgba(124, 92, 252, 0.5);
            transform: translateY(-1px);
        }

        .nav-cta-btn:active {
            transform: scale(0.97);
        }

        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-primary);
            padding: 6px 10px;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 4px rgba(124, 92, 252, 0.3);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255,255,255,0.85%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* ===== 页面横幅 ===== */
        .page-banner {
            position: relative;
            padding: 72px 0 60px;
            text-align: center;
            background:
                linear-gradient(135deg, rgba(13, 15, 26, 0.92) 0%, rgba(13, 15, 26, 0.85) 45%, rgba(124, 92, 252, 0.35) 100%),
                url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            border-bottom: 1px solid var(--border-light);
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 30% 20%, rgba(124, 92, 252, 0.2) 0%, transparent 60%);
            pointer-events: none;
        }

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

        .page-breadcrumb {
            justify-content: center;
            margin-bottom: 16px;
            --bs-breadcrumb-divider-color: rgba(255, 255, 255, 0.35);
        }

        .page-breadcrumb .breadcrumb-item {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
        }

        .page-breadcrumb .breadcrumb-item a {
            color: rgba(255, 255, 255, 0.75);
        }

        .page-breadcrumb .breadcrumb-item a:hover {
            color: var(--brand-cyan);
        }

        .page-breadcrumb .breadcrumb-item.active {
            color: var(--brand-cyan);
        }

        .page-breadcrumb .breadcrumb-item+.breadcrumb-item::before {
            color: rgba(255, 255, 255, 0.4);
        }

        .page-banner h1 {
            font-size: 44px;
            font-weight: 800;
            letter-spacing: 1px;
            margin-bottom: 14px;
            text-shadow: 0 2px 24px rgba(124, 92, 252, 0.3);
        }

        .banner-desc {
            max-width: 620px;
            margin: 0 auto 28px;
            color: rgba(255, 255, 255, 0.85);
            font-size: 16px;
            line-height: 1.6;
        }

        .banner-cta-wrap {
            display: flex;
            justify-content: center;
        }

        .btn-banner-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--gradient-brand);
            color: #fff;
            border: none;
            border-radius: 12px;
            padding: 12px 28px;
            font-weight: 600;
            font-size: 14px;
            cursor: pointer;
            box-shadow: 0 4px 16px rgba(124, 92, 252, 0.35);
            transition: var(--transition-base);
        }

        .btn-banner-cta:hover {
            box-shadow: 0 8px 28px rgba(124, 92, 252, 0.5);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-banner-cta:active {
            transform: scale(0.97);
        }

        /* ===== 通用区块 ===== */
        .section-tag {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(124, 92, 252, 0.15);
            color: var(--text-light);
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
        }

        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 48px;
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        .section-head p {
            color: var(--text-secondary);
            font-size: 16px;
        }

        /* ===== 关于区 ===== */
        .about-section {
            padding: 80px 0;
        }

        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .about-content .section-tag {
            margin-bottom: 12px;
        }

        .about-content h2 {
            font-size: 30px;
            font-weight: 700;
            margin-bottom: 18px;
            line-height: 1.4;
        }

        .about-content>p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .feature-list {
            margin-top: 24px;
        }

        .feature-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-secondary);
            font-size: 15px;
            margin-bottom: 12px;
        }

        .feature-list li i {
            color: var(--brand-cyan);
            font-size: 18px;
            flex-shrink: 0;
        }

        .about-stats {
            display: flex;
            gap: 28px;
            margin-top: 28px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
        }

        .stat-item {
            display: flex;
            flex-direction: column;
        }

        .stat-num {
            font-family: var(--font-num);
            font-size: 32px;
            font-weight: 800;
            color: var(--brand-cyan);
            line-height: 1.2;
        }

        .stat-label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        .about-visual {
            position: relative;
        }

        .about-visual::before {
            content: '';
            position: absolute;
            top: -16px;
            right: -16px;
            width: 120px;
            height: 120px;
            border: 2px dashed rgba(124, 92, 252, 0.4);
            border-radius: 20px;
            z-index: 0;
        }

        .about-visual img {
            position: relative;
            width: 100%;
            height: 360px;
            object-fit: cover;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            z-index: 1;
        }

        /* ===== 服务能力 ===== */
        .service-section {
            padding: 70px 0 80px;
            background: var(--bg-secondary);
        }

        .service-card {
            background: var(--bg-primary);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            height: 100%;
            transition: var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .service-card::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 24px;
            right: 24px;
            height: 1px;
            background: var(--gradient-brand);
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .service-card:hover {
            background: var(--bg-card-hover);
            border-color: rgba(124, 92, 252, 0.4);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .service-card:hover::after {
            opacity: 1;
        }

        .service-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 60px;
            height: 60px;
            border-radius: 20px;
            background: linear-gradient(135deg, rgba(124, 92, 252, 0.2) 0%, rgba(45, 226, 182, 0.1) 100%);
            color: var(--brand-cyan);
            font-size: 26px;
            margin-bottom: 20px;
            border: 1px solid rgba(124, 92, 252, 0.25);
        }

        .service-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .service-card p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== 服务流程 ===== */
        .process-section {
            padding: 80px 0;
        }

        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .process-step {
            background: var(--bg-secondary);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            position: relative;
            overflow: hidden;
            transition: var(--transition-base);
        }

        .process-step::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 3px;
            height: 100%;
            background: var(--gradient-brand);
            border-radius: 0 3px 3px 0;
        }

        .process-step:hover {
            background: var(--bg-card-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .step-num {
            font-family: var(--font-num);
            font-size: 36px;
            font-weight: 800;
            color: var(--brand-cyan);
            line-height: 1;
            display: block;
            margin-bottom: 16px;
        }

        .process-step h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

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

        /* ===== 推荐卡片 ===== */
        .recommend-section {
            padding: 80px 0;
            background: var(--bg-secondary);
        }

        .recommend-card {
            background: var(--bg-primary);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: var(--transition-base);
        }

        .recommend-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(124, 92, 252, 0.3);
        }

        .recommend-card .img-wrap {
            overflow: hidden;
            height: 170px;
        }

        .recommend-card .img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

        .recommend-card:hover .img-wrap img {
            transform: scale(1.03);
        }

        .recommend-info {
            padding: 20px 24px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .recommend-tag {
            display: inline-block;
            padding: 3px 12px;
            background: rgba(124, 92, 252, 0.15);
            color: var(--text-light);
            border-radius: var(--radius-sm);
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 12px;
            align-self: flex-start;
        }

        .recommend-info h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .recommend-info p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.65;
            margin-bottom: 14px;
            flex: 1;
        }

        .recommend-link {
            color: var(--brand-cyan);
            font-weight: 600;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .recommend-link i {
            transition: transform 0.2s ease;
        }

        .recommend-link:hover {
            color: var(--brand-purple);
        }

        .recommend-link:hover i {
            transform: translateX(4px);
        }

        /* ===== CTA ===== */
        .cta-band {
            padding: 80px 0;
        }

        .cta-inner {
            background: var(--gradient-brand);
            border-radius: 24px;
            padding: 56px 40px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-inner::before {
            content: '';
            position: absolute;
            top: -70px;
            right: -70px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
        }

        .cta-inner::after {
            content: '';
            position: absolute;
            bottom: -90px;
            left: -50px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(13, 15, 26, 0.15);
        }

        .cta-inner h2 {
            font-size: 30px;
            font-weight: 700;
            position: relative;
            z-index: 1;
            margin-bottom: 12px;
        }

        .cta-inner p {
            position: relative;
            z-index: 1;
            font-size: 16px;
            opacity: 0.95;
            max-width: 480px;
            margin: 12px auto 28px;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: #0d0f1a;
            color: #fff;
            border-radius: 12px;
            padding: 12px 30px;
            font-weight: 600;
            font-size: 15px;
            border: none;
            position: relative;
            z-index: 1;
            transition: var(--transition-base);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
            cursor: pointer;
        }

        .cta-btn:hover {
            background: #1d2233;
            color: var(--brand-cyan);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
        }

        .cta-btn:active {
            transform: scale(0.97);
        }

        .cta-note {
            margin-top: 16px;
            font-size: 13px;
            opacity: 0.85;
            position: relative;
            z-index: 1;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-footer);
            padding: 60px 0 0;
            border-top: 1px solid var(--border-light);
        }

        .site-footer .navbar-brand {
            margin: 0;
            display: inline-flex;
        }

        .footer-brand {
            margin-bottom: 16px;
        }

        .footer-desc {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
            max-width: 360px;
            margin-bottom: 0;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 18px;
        }

        .footer-links {
            padding: 0;
            margin: 0;
        }

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

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

        .footer-links a:hover {
            color: var(--brand-cyan);
        }

        .footer-contact-list {
            padding: 0;
            margin: 0;
        }

        .footer-contact-list li {
            color: var(--text-secondary);
            font-size: 14px;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-contact-list i {
            color: var(--brand-purple);
            font-size: 16px;
        }

        .footer-disclaimer {
            border-top: 1px solid var(--border-light);
            padding: 20px 0;
            margin-top: 40px;
            color: rgba(255, 255, 255, 0.4);
            font-size: 13px;
            line-height: 1.6;
            text-align: center;
        }

        .footer-copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 16px 0;
            text-align: center;
            color: var(--text-secondary);
            font-size: 14px;
        }

        .footer-copyright a {
            color: var(--text-primary);
        }

        .footer-copyright a:hover {
            color: var(--brand-cyan);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991.98px) {
            .page-banner {
                padding: 56px 0 48px;
            }

            .page-banner h1 {
                font-size: 36px;
            }

            .about-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }

            .about-visual img {
                height: 300px;
            }

            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }

            .navbar-collapse {
                padding: 12px 0;
            }

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

        @media (max-width: 767.98px) {
            .site-header {
                padding: 8px 0;
            }

            .brand-icon {
                width: 36px;
                height: 36px;
                font-size: 13px;
            }

            .brand-text-main {
                font-size: 17px;
            }

            .brand-text-sub {
                font-size: 11px;
            }

            .page-banner {
                padding: 44px 0 40px;
            }

            .page-banner h1 {
                font-size: 30px;
            }

            .banner-desc {
                font-size: 14px;
                padding: 0 12px;
            }

            .about-section,
            .process-section,
            .recommend-section,
            .cta-band {
                padding: 48px 0;
            }

            .section-head {
                margin-bottom: 32px;
            }

            .section-head h2 {
                font-size: 24px;
            }

            .about-content h2 {
                font-size: 24px;
            }

            .about-stats {
                gap: 16px;
                flex-wrap: wrap;
            }

            .stat-num {
                font-size: 26px;
            }

            .about-visual::before {
                width: 80px;
                height: 80px;
                top: -10px;
                right: -10px;
            }

            .service-section {
                padding: 48px 0;
            }

            .process-steps {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .recommend-card .img-wrap {
                height: 150px;
            }

            .cta-inner {
                padding: 36px 20px;
                border-radius: 18px;
            }

            .cta-inner h2 {
                font-size: 22px;
            }

            .cta-inner p {
                font-size: 14px;
            }

            .cta-btn {
                width: 100%;
            }

            .footer-disclaimer {
                text-align: left;
                font-size: 12px;
            }

            .footer-copyright {
                font-size: 13px;
            }

            .site-footer {
                padding-top: 40px;
            }
        }