/* roulang page: index */
:root {
            --primary: #0A1128;
            --secondary: #0E1B3A;
            --accent: #00F0A6;
            --accent-light: #7B61FF;
            --text-main: rgba(255, 255, 255, 0.92);
            --text-secondary: rgba(255, 255, 255, 0.62);
            --text-muted: rgba(255, 255, 255, 0.38);
            --border-color: rgba(255, 255, 255, 0.08);
            --glass-bg: rgba(255, 255, 255, 0.05);
            --glass-border: rgba(255, 255, 255, 0.10);
            --radius: 16px;
            --shadow-base: 0 4px 12px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.4);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            background: var(--primary);
            color: var(--text-main);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease, opacity 0.2s ease;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        input,
        textarea {
            font: inherit;
        }
        .container-wide {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .section-padding {
            padding: 80px 0;
        }
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            height: 64px;
            background: rgba(10, 17, 40, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: box-shadow 0.3s ease;
        }
        .site-header.scrolled {
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
        }
        .header-inner {
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
            gap: 16px;
        }
        .nav-centering {
            display: flex;
            align-items: center;
            gap: 32px;
            height: 100%;
        }
        .nav-left {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 2px;
            border-bottom: 2px solid transparent;
            transition: color 0.2s ease, border-color 0.2s ease;
            line-height: 1.2;
            white-space: nowrap;
        }
        .nav-link:hover {
            color: rgba(255, 255, 255, 0.92);
        }
        .nav-link.active {
            color: #fff;
            border-bottom-color: var(--accent);
            font-weight: 600;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--accent);
            color: #06121F;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 800;
            box-shadow: 0 0 20px rgba(0, 240, 166, 0.28);
        }
        .logo-text {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.3px;
            white-space: nowrap;
        }
        .mobile-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, 0.12);
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            transition: border-color 0.2s ease, background 0.2s ease;
        }
        .mobile-toggle:hover {
            border-color: var(--accent);
            background: rgba(255, 255, 255, 0.05);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            z-index: 99;
            background: rgba(10, 17, 40, 0.98);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 24px;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-menu.show {
            display: flex;
        }
        .mobile-menu a {
            display: block;
            padding: 12px 16px;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: background 0.2s ease, color 0.2s ease;
        }
        .mobile-menu a:hover,
        .mobile-menu a.active {
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--accent);
            color: #06121F;
            font-weight: 700;
            border-radius: 10px;
            padding: 12px 28px;
            font-size: 15px;
            line-height: 1.3;
            transition: all 0.25s ease;
            box-shadow: 0 0 24px rgba(0, 240, 166, 0.18);
        }
        .btn-primary:hover {
            box-shadow: 0 0 40px rgba(0, 240, 166, 0.35);
            filter: brightness(1.05);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 0 16px rgba(0, 240, 166, 0.25);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.24);
            color: #fff;
            font-weight: 600;
            border-radius: 10px;
            padding: 12px 28px;
            font-size: 15px;
            line-height: 1.3;
            transition: all 0.25s ease;
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.4);
        }
        .btn-secondary:active {
            transform: translateY(1px);
        }
        .btn-primary:focus-visible,
        .btn-secondary:focus-visible {
            outline: 3px solid rgba(0, 240, 166, 0.4);
            outline-offset: 2px;
        }
        .glass-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.10);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-radius: 16px;
        }
        .grid-overlay {
            background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 40px 40px;
        }
        .section-badge {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.5px;
            background: rgba(0, 240, 166, 0.10);
            color: var(--accent);
            border: 1px solid rgba(0, 240, 166, 0.18);
        }
        .section-title {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.5px;
            margin-top: 16px;
            color: #fff;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            margin-top: 12px;
            line-height: 1.7;
        }
        .tap-highlight {
            -webkit-tap-highlight-color: transparent;
        }
        .feature-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.10);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-radius: 16px;
            overflow: hidden;
            transition: all 0.3s ease;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            background: rgba(255, 255, 255, 0.08);
            box-shadow: var(--shadow-hover);
            border-color: rgba(255, 255, 255, 0.18);
        }
        .feature-card .img-wrap {
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: linear-gradient(135deg, rgba(0, 240, 166, 0.15), rgba(123, 97, 255, 0.12));
        }
        .feature-card .img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.35s ease;
        }
        .feature-card:hover .img-wrap img {
            transform: scale(1.03);
        }
        .tag-badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(0, 240, 166, 0.10);
            color: var(--accent);
            border: 1px solid rgba(0, 240, 166, 0.14);
        }
        .tag-badge-purple {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(123, 97, 255, 0.12);
            color: #C9BFFF;
            border: 1px solid rgba(123, 97, 255, 0.2);
        }
        .review-slide {
            display: none;
        }
        .review-slide.active {
            display: block;
            animation: fadeSlide 0.5s ease;
        }
        @keyframes fadeSlide {
            from {
                opacity: 0;
                transform: translateY(12px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .review-prev,
        .review-next {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.14);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            transition: all 0.25s ease;
            z-index: 2;
            cursor: pointer;
        }
        .review-prev:hover,
        .review-next:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(255, 255, 255, 0.12);
        }
        .review-prev {
            left: -16px;
        }
        .review-next {
            right: -16px;
        }
        .review-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.35);
            border: none;
            transition: background 0.25s ease, transform 0.25s ease;
            cursor: pointer;
            padding: 0;
        }
        .review-dot.active {
            background: var(--accent);
            transform: scale(1.2);
        }
        .faq-item {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.10);
            border-radius: 16px;
            transition: border-color 0.3s ease, background 0.3s ease;
        }
        .faq-item.open {
            border-color: rgba(0, 240, 166, 0.35);
            background: rgba(255, 255, 255, 0.06);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 18px 20px;
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            text-align: left;
            border-radius: 16px;
            transition: color 0.2s ease;
        }
        .faq-question:hover {
            color: var(--accent);
        }
        .faq-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--text-secondary);
            flex-shrink: 0;
            transition: transform 0.3s ease, color 0.3s ease, border-color 0.3s ease;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            color: var(--accent);
            border-color: var(--accent);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            padding: 0 20px 0 20px;
        }
        .faq-item.open .faq-answer {
            max-height: 600px;
            padding-bottom: 20px;
        }
        .faq-answer p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 16px;
        }
        .line-clamp-2 {
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .cta-glow {
            background: radial-gradient(circle at 50% 50%, rgba(0, 240, 166, 0.12), transparent 70%);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 20px 0 16px;
        }
        .list-item-card {
            background: #101B38;
            border: 1px solid rgba(255, 255, 255, 0.05);
            border-radius: 14px;
            transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
        }
        .list-item-card:hover {
            border-color: rgba(0, 240, 166, 0.3);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        @media (max-width: 1024px) {
            .nav-centering {
                gap: 20px;
            }
            .nav-left,
            .nav-right {
                gap: 18px;
            }
        }
        @media (max-width: 768px) {
            .container-wide {
                padding: 0 16px;
            }
            .section-padding {
                padding: 48px 0;
            }
            .section-title {
                font-size: 24px;
            }
            .nav-left,
            .nav-right {
                display: none;
            }
            .mobile-toggle {
                display: flex;
            }
            .header-inner {
                padding: 0 16px;
            }
            .review-prev {
                left: 0;
            }
            .review-next {
                right: 0;
            }
        }
        @media (max-width: 480px) {
            .logo-text {
                font-size: 18px;
            }
            .logo-mark {
                width: 32px;
                height: 32px;
                font-size: 16px;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0A1128;
            --secondary: #0E1B3A;
            --accent: #00F0A6;
            --purple: #7B61FF;
            --text-main: rgba(255, 255, 255, 0.92);
            --text-secondary: rgba(255, 255, 255, 0.62);
            --text-muted: rgba(255, 255, 255, 0.38);
            --border-color: rgba(255, 255, 255, 0.08);
            --glass-bg: rgba(255, 255, 255, 0.05);
            --glass-border: rgba(255, 255, 255, 0.10);
            --radius: 16px;
            --shadow-base: 0 4px 12px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.4);
            --font-stack: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            background: var(--primary);
            color: var(--text-main);
            line-height: 1.65;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
        }

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

        input,
        select,
        textarea {
            font-family: inherit;
        }

        /* ===== 容器 ===== */
        .container-wide {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== 导航 ===== */
        .site-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 64px;
            background: rgba(10, 17, 40, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            z-index: 100;
        }

        .nav-inner {
            max-width: 1200px;
            margin: 0 auto;
            height: 100%;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            position: relative;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-center {
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--accent);
            color: #06121F;
            font-weight: 800;
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 20px rgba(0, 240, 166, 0.3);
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            height: 36px;
            padding: 0 14px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            position: relative;
        }

        .nav-link:hover {
            color: rgba(255, 255, 255, 0.95);
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-link.active {
            color: #fff;
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 1px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            box-shadow: 0 0 8px rgba(0, 240, 166, 0.6);
        }

        .menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            color: rgba(255, 255, 255, 0.85);
            font-size: 20px;
            transition: background 0.25s;
        }

        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            background: var(--primary);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 12px 24px 20px;
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-link {
            display: block;
            padding: 12px 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
        }

        .mobile-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.05);
        }

        .mobile-link.active {
            color: var(--accent);
            font-weight: 600;
        }

        /* ===== 按钮 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--accent);
            color: #06121F;
            font-weight: 700;
            font-size: 15px;
            border-radius: 10px;
            padding: 12px 28px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 16px rgba(0, 240, 166, 0.2);
        }

        .btn-primary:hover {
            background: #3df5bc;
            box-shadow: 0 0 40px rgba(0, 240, 166, 0.35);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: translateY(1px);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            color: rgba(255, 255, 255, 0.9);
            font-weight: 600;
            font-size: 15px;
            border: 1px solid rgba(255, 255, 255, 0.24);
            border-radius: 10px;
            padding: 12px 28px;
            transition: all 0.3s ease;
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.4);
        }

        /* ===== Hero 横幅 ===== */
        .page-hero {
            position: relative;
            padding: 130px 0 80px;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(10, 17, 40, 0.94) 40%, rgba(10, 17, 40, 0.75) 70%, rgba(10, 17, 40, 0.5) 100%);
            z-index: 1;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
            background-size: 40px 40px;
            z-index: 0;
        }

        .page-hero .container-wide {
            position: relative;
            z-index: 2;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(0, 240, 166, 0.1);
            border: 1px solid rgba(0, 240, 166, 0.25);
            margin-bottom: 20px;
        }

        .hero-title {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.5px;
            color: #fff;
            max-width: 700px;
        }

        .hero-title span {
            color: var(--accent);
        }

        .hero-desc {
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-secondary);
            max-width: 600px;
            margin-top: 20px;
        }

        /* ===== 数据条 ===== */
        .stats-section {
            background: var(--secondary);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .stat-card {
            padding: 32px 16px;
            text-align: center;
            border-right: 1px solid rgba(255, 255, 255, 0.05);
        }

        .stat-card:last-child {
            border-right: none;
        }

        .stat-number {
            font-size: 32px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.1;
        }

        .stat-label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 8px;
        }

        /* ===== 横向卡片列表 ===== */
        .solution-card {
            display: flex;
            align-items: center;
            gap: 20px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius);
            padding: 20px;
            transition: all 0.3s ease;
        }

        .solution-card:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(0, 240, 166, 0.25);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .solution-thumb {
            width: 120px;
            height: 80px;
            border-radius: 12px;
            object-fit: cover;
            flex-shrink: 0;
        }

        .solution-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(0, 240, 166, 0.08);
            border: 1px solid rgba(0, 240, 166, 0.2);
            border-radius: 4px;
            padding: 2px 10px;
            margin-bottom: 8px;
        }

        .solution-title {
            font-size: 17px;
            font-weight: 700;
            color: rgba(255, 255, 255, 0.95);
            margin-bottom: 4px;
        }

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

        .solution-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            margin-top: 8px;
        }

        .solution-link i {
            transition: transform 0.25s;
        }

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

        /* ===== 场景卡片 ===== */
        .scenario-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius);
            padding: 28px 24px;
            transition: all 0.3s ease;
            height: 100%;
        }

        .scenario-card:hover {
            border-color: rgba(0, 240, 166, 0.3);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .scenario-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(0, 240, 166, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--accent);
            margin-bottom: 16px;
        }

        .scenario-title {
            font-size: 17px;
            font-weight: 700;
            color: rgba(255, 255, 255, 0.95);
            margin-bottom: 8px;
        }

        .scenario-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== 流程 ===== */
        .step-item {
            position: relative;
            text-align: center;
            padding: 0 12px;
        }

        .step-number {
            width: 56px;
            height: 56px;
            margin: 0 auto 16px;
            border-radius: 50%;
            background: var(--secondary);
            border: 2px solid var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            color: var(--accent);
            box-shadow: 0 0 20px rgba(0, 240, 166, 0.15);
        }

        .step-title {
            font-size: 16px;
            font-weight: 700;
            color: rgba(255, 255, 255, 0.92);
            margin-bottom: 8px;
        }

        .step-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            max-width: 240px;
            margin: 0 auto;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 14px;
            overflow: hidden;
            transition: border-color 0.3s;
            margin-bottom: 12px;
        }

        .faq-item.open {
            border-color: rgba(0, 240, 166, 0.3);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            font-size: 16px;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.92);
            cursor: pointer;
            min-height: 56px;
            user-select: none;
        }

        .faq-question:hover {
            color: var(--accent);
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 14px;
            flex-shrink: 0;
            transition: transform 0.3s;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .faq-answer-inner {
            padding: 0 22px 18px;
            font-size: 14px;
            line-height: 1.75;
            color: var(--text-secondary);
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            background: linear-gradient(120deg, var(--primary), var(--secondary));
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: 24px;
            overflow: hidden;
            padding: 48px 40px;
            text-align: center;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 240, 166, 0.12) 0%, transparent 70%);
            top: -200px;
            right: -80px;
            pointer-events: none;
        }

        .cta-title {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
            position: relative;
            z-index: 1;
        }

        .cta-desc {
            font-size: 15px;
            color: var(--text-secondary);
            margin-top: 12px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
            position: relative;
            z-index: 1;
        }

        .cta-btn-wrap {
            margin-top: 28px;
            position: relative;
            z-index: 1;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #060B18;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }

        .footer-logo-mark {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: var(--accent);
            color: #06121F;
            font-weight: 800;
            font-size: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== 焦点状态 ===== */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1023px) {
            .nav-left,
            .nav-right {
                display: none;
            }

            .menu-toggle {
                display: flex;
            }

            .nav-center {
                position: relative;
                left: auto;
                transform: none;
            }

            .nav-inner {
                justify-content: space-between;
            }

            .page-hero {
                padding-top: 110px;
            }

            .hero-title {
                font-size: 34px;
            }

            .stat-card {
                border-right: none;
                border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            }

            .stat-card:nth-child(n+3) {
                border-bottom: none;
            }
        }

        @media (max-width: 767px) {
            .container-wide {
                padding-left: 16px;
                padding-right: 16px;
            }

            .hero-title {
                font-size: 28px;
            }

            .hero-desc {
                font-size: 14px;
            }

            .solution-card {
                flex-direction: column;
                align-items: flex-start;
                padding: 16px;
            }

            .solution-thumb {
                width: 100%;
                height: 140px;
            }

            .cta-section {
                padding: 36px 20px;
            }

            .cta-title {
                font-size: 22px;
            }

            .stat-number {
                font-size: 24px;
            }
        }

/* roulang page: article */
:root {
            --primary: #0A1128;
            --secondary: #0E1B3A;
            --accent: #00F0A6;
            --purple: #7B61FF;
            --text-main: rgba(255, 255, 255, 0.92);
            --text-sub: rgba(255, 255, 255, 0.62);
            --text-weak: rgba(255, 255, 255, 0.38);
            --border-white: rgba(255, 255, 255, 0.08);
            --card-bg: rgba(255, 255, 255, 0.05);
            --card-border: rgba(255, 255, 255, 0.10);
            --radius: 16px;
            --shadow-base: 0 4px 12px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.4);
            --font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background: var(--primary);
            color: var(--text-main);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .3s;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        ul, ol {
            list-style-position: inside;
        }

        .container-wide {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .container-article {
            max-width: 780px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            height: 64px;
            background: rgba(10, 17, 40, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .header-inner {
            height: 64px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 24px;
        }
        .nav-link {
            color: var(--text-sub);
            font-size: 15px;
            font-weight: 500;
            padding: 6px 4px;
            position: relative;
            line-height: 1.2;
            transition: color .3s;
            white-space: nowrap;
        }
        .nav-link:hover {
            color: #fff;
        }
        .nav-link.active {
            color: #fff;
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            box-shadow: 0 0 12px rgba(0, 240, 166, 0.5);
        }
        .logo-header {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            margin: 0 auto;
        }
        .logo-mark {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent), #00bfe6);
            color: #06121F;
            font-weight: 800;
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 20px rgba(0, 240, 166, 0.25);
        }
        .logo-header span {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.5px;
        }
        .mobile-toggle {
            display: none;
            font-size: 22px;
            color: #fff;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
        }
        .mobile-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            background: rgba(10, 17, 40, 0.98);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            padding: 20px 24px 28px;
            border-bottom: 1px solid var(--border-white);
            z-index: 99;
            flex-direction: column;
            gap: 6px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu a {
            padding: 12px 8px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-sub);
            border-radius: 8px;
            display: flex;
            align-items: center;
            gap: 12px;
            transition: all .3s;
        }
        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: #fff;
            background: rgba(255, 255, 255, 0.05);
        }
        .mobile-menu a.active {
            color: var(--accent);
        }
        .mobile-menu a i {
            width: 20px;
            text-align: center;
            color: var(--accent);
        }

        .breadcrumb-wrap {
            padding: 28px 0 0;
            background: var(--primary);
        }
        .breadcrumb-list {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            list-style: none;
            font-size: 13px;
            color: var(--text-weak);
        }
        .breadcrumb-list li {
            display: flex;
            align-items: center;
        }
        .breadcrumb-list li + li::before {
            content: '/';
            margin-right: 8px;
            color: rgba(255, 255, 255, 0.25);
            font-size: 12px;
        }
        .breadcrumb-list a {
            transition: color .3s;
        }
        .breadcrumb-list a:hover {
            color: var(--accent);
        }

        .article-header {
            padding: 44px 0 36px;
            background: var(--primary);
        }
        .article-header h1 {
            font-size: 2.25rem;
            font-weight: 800;
            line-height: 1.3;
            color: #fff;
            letter-spacing: -0.02em;
            word-break: break-word;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-top: 18px;
            font-size: 14px;
            color: var(--text-sub);
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta i {
            color: var(--accent);
            font-size: 13px;
        }

        .article-body {
            padding-bottom: 64px;
            background: var(--primary);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding-top: 40px;
        }
        .article-content {
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-main);
        }
        .article-content > p {
            margin: 1.5rem 0;
        }
        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 800;
            color: #fff;
            margin: 2.5rem 0 1rem;
            padding-top: 0.5rem;
            line-height: 1.4;
        }
        .article-content h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin: 2rem 0 0.75rem;
            line-height: 1.4;
        }
        .article-content h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            margin: 1.75rem 0 0.5rem;
        }
        .article-content ul,
        .article-content ol {
            margin: 1.5rem 0;
            padding-left: 1.8rem;
        }
        .article-content ul {
            list-style: disc;
        }
        .article-content ol {
            list-style: decimal;
        }
        .article-content li {
            margin: 0.5rem 0;
            padding-left: 0.25rem;
        }
        .article-content li::marker {
            color: var(--accent);
        }
        .article-content img {
            max-width: 100%;
            border-radius: 12px;
            margin: 2rem auto;
            box-shadow: var(--shadow-base);
        }
        .article-content figure {
            margin: 2rem 0;
        }
        .article-content figure img {
            margin: 0 auto;
        }
        .article-content figcaption {
            text-align: center;
            font-size: 13px;
            color: var(--text-weak);
            margin-top: 8px;
        }
        .article-content a {
            color: var(--accent);
            border-bottom: 1px solid transparent;
            transition: border-color .3s;
        }
        .article-content a:hover {
            border-bottom-color: var(--accent);
        }
        .article-content blockquote {
            border-left: 3px solid var(--accent);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            background: rgba(0, 240, 166, 0.04);
            border-radius: 0 12px 12px 0;
            color: var(--text-sub);
        }
        .article-content code {
            background: rgba(255, 255, 255, 0.08);
            padding: 2px 6px;
            border-radius: 4px;
            font-size: 0.9em;
            font-family: "SF Mono", Monaco, monospace;
        }
        .article-content pre {
            background: #0D1530;
            border: 1px solid var(--border-white);
            border-radius: 12px;
            padding: 20px;
            overflow-x: auto;
            margin: 1.5rem 0;
        }
        .article-content pre code {
            background: none;
            padding: 0;
            font-size: 14px;
        }
        .article-content hr {
            border: none;
            border-top: 1px solid var(--border-white);
            margin: 2.5rem 0;
        }
        .article-content strong {
            color: #fff;
            font-weight: 700;
        }

        .article-tags {
            margin-top: 36px;
            padding-top: 20px;
            border-top: 1px solid var(--border-white);
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .article-tag {
            display: inline-flex;
            align-items: center;
            font-size: 12px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 20px;
            background: rgba(0, 240, 166, 0.08);
            color: var(--accent);
        }
        .article-tag.purple {
            background: rgba(123, 97, 255, 0.1);
            color: var(--purple);
        }

        .article-not-found {
            text-align: center;
            padding: 80px 24px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--card-border);
            border-radius: var(--radius);
        }
        .article-not-found .icon-circle {
            width: 72px;
            height: 72px;
            margin: 0 auto 20px;
            border-radius: 50%;
            background: rgba(0, 240, 166, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 32px;
            color: var(--accent);
        }
        .article-not-found h2 {
            font-size: 24px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-sub);
            margin-bottom: 28px;
            max-width: 400px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 700;
            transition: all .3s ease;
            line-height: 1.2;
            border: none;
        }
        .btn-primary {
            background: var(--accent);
            color: #06121F;
            box-shadow: 0 0 20px rgba(0, 240, 166, 0.2);
        }
        .btn-primary:hover {
            background: #2ff5b8;
            box-shadow: 0 0 40px rgba(0, 240, 166, 0.35);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 0 15px rgba(0, 240, 166, 0.2);
        }
        .btn-ghost {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.24);
        }
        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.4);
            transform: translateY(-1px);
        }
        .btn-ghost:active {
            transform: translateY(1px);
        }

        .related-section {
            padding: 64px 0 56px;
            background: var(--secondary);
            border-top: 1px solid var(--border-white);
        }
        .related-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
        }
        .related-head h2 {
            font-size: 1.5rem;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .related-head h2::before {
            content: '';
            width: 4px;
            height: 24px;
            border-radius: 2px;
            background: var(--accent);
            box-shadow: 0 0 12px rgba(0, 240, 166, 0.4);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all .3s ease;
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .related-card-img {
            width: 100%;
            height: 150px;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .related-card:hover .related-card-img {
            transform: scale(1.04);
        }
        .related-card-body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card-body h3 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .related-card-body p {
            font-size: 13px;
            color: var(--text-sub);
            line-height: 1.7;
            flex: 1;
        }
        .related-card-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            margin-top: 14px;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            transition: gap .3s;
        }
        .related-card-link:hover {
            gap: 8px;
        }

        .back-section {
            padding: 40px 0;
            background: var(--secondary);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            text-align: center;
        }

        .cta-section {
            padding: 80px 0;
            background: var(--primary);
            position: relative;
            overflow: hidden;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 600px;
            height: 300px;
            transform: translate(-50%, -50%);
            background: radial-gradient(ellipse, rgba(0, 240, 166, 0.08), transparent 70%);
            pointer-events: none;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 60px 60px;
            pointer-events: none;
        }
        .cta-content {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 1.75rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: var(--text-sub);
            margin-bottom: 32px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
            font-size: 15px;
            line-height: 1.7;
        }

        .faq-section {
            padding: 80px 0;
            background: var(--primary);
            border-top: 1px solid var(--border-white);
        }
        .faq-section h2 {
            font-size: 1.6rem;
            font-weight: 800;
            color: #fff;
            text-align: center;
            margin-bottom: 12px;
        }
        .faq-subtitle {
            text-align: center;
            color: var(--text-sub);
            font-size: 14px;
            margin-bottom: 40px;
        }
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: 12px;
            padding: 20px 24px;
            margin-bottom: 16px;
            transition: border-color .3s;
        }
        .faq-item.active {
            border-color: rgba(0, 240, 166, 0.3);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            line-height: 1.4;
        }
        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 18px;
            font-weight: 700;
            transition: transform .3s;
            flex-shrink: 0;
            margin-left: 16px;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease;
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.75;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            margin-top: 12px;
        }

        .footer-copy {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            margin-top: 48px;
            padding-top: 32px;
            text-align: center;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.3);
        }

        .social-proof {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            margin-top: 24px;
            flex-wrap: wrap;
        }
        .proof-item {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            background: rgba(255, 255, 255, 0.04);
            padding: 6px 16px;
            border-radius: 20px;
        }
        .proof-item i {
            color: var(--accent);
            font-size: 12px;
        }

        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .nav-left,
            .nav-right {
                gap: 16px;
            }
            .nav-link {
                font-size: 14px;
            }
        }

        @media (max-width: 768px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .mobile-toggle {
                display: flex;
            }
            .header-inner {
                justify-content: space-between;
            }
            .logo-header {
                margin: 0;
                position: absolute;
                left: 50%;
                transform: translateX(-50%);
            }
            .article-header h1 {
                font-size: 1.75rem;
            }
            .breadcrumb-wrap {
                padding-top: 20px;
            }
        }

        @media (max-width: 640px) {
            .container-wide,
            .container-article {
                padding-left: 16px;
                padding-right: 16px;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .article-meta {
                gap: 10px;
                flex-direction: column;
            }
            .cta-section {
                padding: 60px 0;
            }
            .cta-section h2 {
                font-size: 1.35rem;
            }
            .faq-section {
                padding: 60px 0;
            }
            .related-section {
                padding: 48px 0 40px;
            }
            .article-header {
                padding: 32px 0 28px;
            }
            .article-header h1 {
                font-size: 1.5rem;
            }
            .article-body {
                padding-top: 28px;
                padding-bottom: 48px;
            }
            .article-content {
                font-size: 15px;
            }
            .btn {
                padding: 11px 22px;
                font-size: 14px;
            }
            .proof-item {
                font-size: 12px;
                padding: 5px 12px;
            }
        }

/* roulang page: category2 */
:root {
  --bg-primary: #0A1128;
  --bg-secondary: #0E1B3A;
  --bg-card: #101B38;
  --accent: #00F0A6;
  --purple: #7B61FF;
  --text-main: rgba(255, 255, 255, 0.92);
  --text-muted: rgba(255, 255, 255, 0.62);
  --text-dim: rgba(255, 255, 255, 0.38);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.12);
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.4);
  --glow: 0 0 40px rgba(0, 240, 166, 0.35);
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  background: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font-family: inherit;
  background: none;
  border: none;
  cursor: pointer;
}
.container-wide {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}
.nav-glass {
  background: rgba(10, 17, 40, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.72);
  padding: 8px 2px;
  transition: color 0.25s ease;
  white-space: nowrap;
}
.nav-link:hover {
  color: #fff;
}
.nav-link.active {
  color: #fff;
  font-weight: 600;
}
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  box-shadow: 0 0 12px rgba(0, 240, 166, 0.45);
}
.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--purple));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #06121F;
  font-weight: 800;
  font-size: 18px;
  box-shadow: 0 0 20px rgba(0, 240, 166, 0.25);
  flex-shrink: 0;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--accent);
  color: #06121F;
  font-weight: 700;
  border-radius: 10px;
  padding: 12px 28px;
  font-size: 15px;
  transition: all 0.25s ease;
  border: 1px solid transparent;
  line-height: 1.2;
}
.btn-primary:hover {
  background: #3effbb;
  box-shadow: var(--glow);
  transform: translateY(-1px);
}
.btn-primary:active {
  transform: translateY(1px);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: transparent;
  color: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 10px;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 500;
  transition: all 0.25s ease;
  line-height: 1.2;
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.4);
}
.glass-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.10);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 16px;
}
.cover-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 16px;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.cover-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 240, 166, 0.2);
}
.cover-card:hover .cover-img img {
  transform: scale(1.03);
}
.cover-img {
  overflow: hidden;
  aspect-ratio: 16 / 10;
}
.cover-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.tagchip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 12px;
  color: var(--accent);
  font-weight: 500;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(123, 97, 255, 0.12);
  border: 1px solid rgba(123, 97, 255, 0.3);
  color: #b8a8ff;
  font-size: 13px;
  font-weight: 500;
}
.sidebar-nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 10px;
  color: rgba(255, 255, 255, 0.65);
  font-size: 14px;
  transition: all 0.2s ease;
}
.sidebar-nav-link:hover {
  background: rgba(0, 240, 166, 0.08);
  color: var(--accent);
}
.section-title {
  font-size: clamp(24px, 3vw, 28px);
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #fff;
}
.section-sub {
  color: var(--text-muted);
  font-size: 15px;
  margin-top: 8px;
}
.page-hero {
  background-size: cover;
  background-position: center;
  position: relative;
}
.faq-item {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: 16px;
  overflow: hidden;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.faq-item.open {
  border-color: rgba(0, 240, 166, 0.3);
  background: rgba(255, 255, 255, 0.07);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  color: var(--text-main);
  font-size: 15px;
  font-weight: 600;
  text-align: left;
  transition: color 0.25s;
}
.faq-question:hover {
  color: #fff;
}
.faq-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  color: var(--accent);
  font-size: 14px;
  transition: transform 0.3s ease, background 0.3s ease, border-color 0.3s ease;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: rgba(0, 240, 166, 0.1);
  border-color: var(--accent);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.faq-item.open .faq-answer {
  max-height: 500px;
}
.faq-answer-inner {
  padding: 0 20px 20px;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.8;
}
.cta-card {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--bg-secondary), #14224a);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  padding: 48px 32px;
  text-align: center;
}
.cta-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 120%, rgba(0, 240, 166, 0.12), transparent 60%);
  pointer-events: none;
}
.cta-card > * {
  position: relative;
  z-index: 1;
}
.mobile-menu {
  position: fixed;
  top: 64px;
  left: 16px;
  right: 16px;
  z-index: 40;
  background: rgba(14, 27, 58, 0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.mobile-menu a {
  padding: 12px 16px;
  border-radius: 10px;
  color: var(--text-muted);
  font-size: 15px;
  font-weight: 500;
  transition: background 0.2s ease, color 0.2s ease;
}
.mobile-menu a:hover,
.mobile-menu a.active {
  background: rgba(0, 240, 166, 0.08);
  color: var(--accent);
}
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 6px;
}
@media (max-width: 639px) {
  .container-wide {
    padding-left: 16px;
    padding-right: 16px;
  }
  .cta-card {
    padding: 36px 20px;
  }
  .btn-primary,
  .btn-outline {
    width: 100%;
  }
}