/* roulang page: index */
:root {
            --primary: #00F0FF;
            --primary-glow: rgba(0, 240, 255, 0.35);
            --secondary: #7B2FFF;
            --accent: #FF4D6D;
            --dark-base: #0A0E17;
            --dark-card: #0F1520;
            --dark-alt: #131B2A;
            --glass-border: rgba(255, 255, 255, 0.05);
            --glass-bg: rgba(255, 255, 255, 0.02);
            --text-primary: #FFFFFF;
            --text-body: rgba(255, 255, 255, 0.7);
            --text-muted: rgba(255, 255, 255, 0.4);
            --radius-card: 16px;
            --radius-btn: 12px;
            --radius-tag: 8px;
            --transition-fast: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            --shadow-glow-primary: 0 0 30px rgba(0, 240, 255, 0.18);
            --shadow-glow-accent: 0 0 24px rgba(255, 77, 109, 0.22);
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 80px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, sans-serif;
            font-size: 16px;
            font-weight: 400;
            line-height: 1.75;
            color: var(--text-body);
            background-color: var(--dark-base);
            overflow-x: hidden;
            min-height: 100vh;
        }

        .font-num {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }

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

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

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

        input {
            font-family: inherit;
            outline: none;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 72px;
            background: rgba(10, 14, 23, 0.75);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background var(--transition-fast);
        }

        .site-header.scrolled {
            background: rgba(10, 14, 23, 0.88);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .nav-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: -0.3px;
            white-space: nowrap;
            z-index: 1001;
        }

        .nav-brand .brand-icon {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: radial-gradient(circle at 40% 35%, var(--primary) 0%, var(--secondary) 80%);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            flex-shrink: 0;
        }

        .nav-brand .brand-icon::after {
            content: '';
            position: absolute;
            width: 10px;
            height: 10px;
            background: #fff;
            border-radius: 50%;
            top: 6px;
            left: 50%;
            transform: translateX(-50%);
            box-shadow: 0 0 8px rgba(255, 255, 255, 0.9), 0 0 20px var(--primary-glow);
            animation: brandPulse 2.5s ease-in-out infinite;
        }

        @keyframes brandPulse {
            0%,
            100% {
                box-shadow: 0 0 8px rgba(255, 255, 255, 0.9), 0 0 20px var(--primary-glow);
            }
            50% {
                box-shadow: 0 0 14px rgba(255, 255, 255, 1), 0 0 36px rgba(0, 240, 255, 0.7);
            }
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 40px;
            list-style: none;
        }

        .nav-links a {
            font-size: 15px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.7);
            position: relative;
            padding-bottom: 6px;
            transition: color var(--transition-fast);
            letter-spacing: -0.2px;
        }

        .nav-links a:hover {
            color: #FFFFFF;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 100%;
            height: 1px;
            background: var(--primary);
            box-shadow: 0 0 6px var(--primary-glow);
            transition: transform var(--transition-smooth);
            border-radius: 1px;
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            transform: translateX(-50%) scaleX(1);
        }

        .nav-links a.active {
            color: #FFFFFF;
        }

        /* 汉堡按钮 */
        .hamburger {
            display: none;
            flex-direction: column;
            align-items: center;
            gap: 6px;
            cursor: pointer;
            z-index: 1001;
            padding: 10px 6px;
            background: none;
            border: none;
            min-width: 44px;
            min-height: 44px;
            justify-content: center;
        }

        .hamburger .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 8px var(--primary-glow);
            transition: all var(--transition-fast);
        }

        .hamburger .line {
            width: 22px;
            height: 1.5px;
            background: rgba(255, 255, 255, 0.8);
            border-radius: 1px;
            transition: all var(--transition-fast);
        }

        .hamburger.active .dot:first-child {
            transform: translateY(4px);
            opacity: 0.5;
        }
        .hamburger.active .dot:last-child {
            transform: translateY(-4px);
            opacity: 0.5;
        }
        .hamburger.active .line {
            width: 26px;
            background: #fff;
        }

        /* 移动端抽屉 */
        .mobile-drawer {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: rgba(10, 14, 23, 0.94);
            backdrop-filter: blur(28px);
            -webkit-backdrop-filter: blur(28px);
            z-index: 999;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 36px;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-smooth);
        }

        .mobile-drawer.open {
            opacity: 1;
            pointer-events: auto;
        }

        .mobile-drawer a {
            font-size: 22px;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.8);
            letter-spacing: -0.3px;
            transition: color var(--transition-fast);
        }

        .mobile-drawer a:hover,
        .mobile-drawer a:active {
            color: var(--primary);
        }

        /* ===== 容器 ===== */
        .section-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .section-padding {
            padding: 120px 0;
        }

        /* ===== Hero ===== */
        .hero-section {
            min-height: 90vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 55% 40%, rgba(0, 240, 255, 0.08) 0%, transparent 60%),
                radial-gradient(ellipse at 30% 60%, rgba(123, 47, 255, 0.06) 0%, transparent 50%),
                linear-gradient(180deg, rgba(10, 14, 23, 0.4) 0%, rgba(10, 14, 23, 0.75) 60%, rgba(10, 14, 23, 0.9) 100%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
        }

        .hero-particles {
            position: absolute;
            inset: 0;
            z-index: 1;
            pointer-events: none;
            overflow: hidden;
        }

        .particle {
            position: absolute;
            border-radius: 50%;
            pointer-events: none;
            animation: floatParticle 8s ease-in-out infinite;
        }

        .particle:nth-child(1) {
            width: 4px;
            height: 4px;
            background: var(--primary);
            box-shadow: 0 0 14px var(--primary-glow);
            top: 22%;
            right: 28%;
            animation-delay: 0s;
            animation-duration: 7s;
        }
        .particle:nth-child(2) {
            width: 3px;
            height: 3px;
            background: var(--secondary);
            box-shadow: 0 0 10px rgba(123, 47, 255, 0.5);
            top: 35%;
            right: 40%;
            animation-delay: 1.5s;
            animation-duration: 9s;
        }
        .particle:nth-child(3) {
            width: 5px;
            height: 5px;
            background: var(--accent);
            box-shadow: 0 0 16px rgba(255, 77, 109, 0.5);
            top: 50%;
            right: 18%;
            animation-delay: 3s;
            animation-duration: 10s;
        }
        .particle:nth-child(4) {
            width: 3px;
            height: 3px;
            background: var(--primary);
            box-shadow: 0 0 12px var(--primary-glow);
            top: 60%;
            right: 32%;
            animation-delay: 4.5s;
            animation-duration: 8s;
        }
        .particle:nth-child(5) {
            width: 4px;
            height: 4px;
            background: #fff;
            box-shadow: 0 0 18px rgba(255, 255, 255, 0.7);
            top: 28%;
            right: 50%;
            animation-delay: 2s;
            animation-duration: 11s;
        }

        @keyframes floatParticle {
            0%,
            100% {
                transform: translateY(0) translateX(0) scale(1);
                opacity: 0.6;
            }
            25% {
                transform: translateY(-60px) translateX(30px) scale(1.8);
                opacity: 1;
            }
            50% {
                transform: translateY(-20px) translateX(-25px) scale(0.8);
                opacity: 0.4;
            }
            75% {
                transform: translateY(-80px) translateX(15px) scale(1.4);
                opacity: 0.85;
            }
        }

        /* ===== 玻璃卡片 ===== */
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.04);
            transition: all var(--transition-smooth);
        }

        .glass-card:hover {
            border-color: rgba(0, 240, 255, 0.25);
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.1), 0 8px 32px rgba(0, 0, 0, 0.4);
            transform: translateY(-4px);
            background: rgba(255, 255, 255, 0.03);
        }

        .glass-card-recommended {
            border: 1px solid rgba(0, 240, 255, 0.4);
            box-shadow: 0 0 36px rgba(0, 240, 255, 0.12), 0 0 8px rgba(0, 240, 255, 0.06);
            background: rgba(255, 255, 255, 0.04);
        }

        .glass-card-recommended:hover {
            border-color: rgba(0, 240, 255, 0.6);
            box-shadow: 0 0 50px rgba(0, 240, 255, 0.2), 0 12px 40px rgba(0, 0, 0, 0.5);
        }

        /* ===== 按钮 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #0A0E17;
            font-weight: 600;
            font-size: 16px;
            border-radius: var(--radius-btn);
            padding: 14px 32px;
            min-height: 48px;
            min-width: 44px;
            transition: all var(--transition-fast);
            letter-spacing: -0.2px;
            cursor: pointer;
            border: none;
            position: relative;
            overflow: hidden;
        }

        .btn-primary:hover {
            background: #33F3FF;
            box-shadow: 0 0 28px var(--primary-glow), 0 0 50px rgba(0, 240, 255, 0.25);
            transform: translateY(-1px);
        }

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

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--primary);
            font-weight: 600;
            font-size: 16px;
            border-radius: var(--radius-btn);
            padding: 14px 32px;
            min-height: 48px;
            min-width: 44px;
            border: 1px solid rgba(0, 240, 255, 0.35);
            transition: all var(--transition-fast);
            letter-spacing: -0.2px;
            cursor: pointer;
        }

        .btn-outline:hover {
            border-color: var(--primary);
            background: rgba(0, 240, 255, 0.08);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.15);
            color: #fff;
            transform: translateY(-1px);
        }

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

        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            font-size: 16px;
            border-radius: var(--radius-btn);
            padding: 14px 32px;
            min-height: 48px;
            min-width: 44px;
            transition: all var(--transition-fast);
            letter-spacing: -0.2px;
            cursor: pointer;
            border: none;
        }

        .btn-accent:hover {
            background: #FF6B83;
            box-shadow: 0 0 28px rgba(255, 77, 109, 0.4);
            transform: translateY(-1px);
        }

        /* ===== 功能圆点 ===== */
        .feature-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 10px var(--primary-glow);
            flex-shrink: 0;
            margin-top: 8px;
        }

        /* ===== FAQ ===== */
        .faq-item {
            border: 1px solid rgba(255, 255, 255, 0.04);
            border-radius: var(--radius-card);
            background: rgba(255, 255, 255, 0.015);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            overflow: hidden;
            transition: all var(--transition-smooth);
            cursor: pointer;
        }

        .faq-item:hover {
            border-color: rgba(255, 255, 255, 0.1);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            gap: 16px;
            user-select: none;
            min-height: 56px;
        }

        .faq-indicator {
            width: 2px;
            height: 20px;
            background: rgba(0, 240, 255, 0.3);
            border-radius: 1px;
            flex-shrink: 0;
            transition: all var(--transition-smooth);
        }

        .faq-item.open .faq-indicator {
            height: 28px;
            background: var(--primary);
            box-shadow: 0 0 10px var(--primary-glow);
        }

        .faq-toggle-icon {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: rgba(255, 255, 255, 0.5);
            transition: all var(--transition-fast);
            border-radius: 50%;
            min-width: 44px;
            min-height: 44px;
            margin: -8px;
        }

        .faq-item.open .faq-toggle-icon {
            color: var(--primary);
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth), padding var(--transition-smooth);
            padding: 0 24px 0 24px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px 24px;
        }

        .faq-answer-inner {
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.7;
            padding-left: 12px;
            border-left: 1px solid rgba(255, 255, 255, 0.06);
        }

        /* ===== 场景卡片 ===== */
        .scenario-card {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.05);
            background: rgba(255, 255, 255, 0.02);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            transition: all var(--transition-smooth);
            cursor: pointer;
            min-height: 320px;
        }

        .scenario-card:hover {
            border-color: rgba(0, 240, 255, 0.3);
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.08);
        }

        .scenario-card img {
            transition: transform var(--transition-smooth);
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

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

        .scenario-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 20px 24px;
            background: linear-gradient(transparent, rgba(10, 14, 23, 0.9));
            transition: all var(--transition-smooth);
        }

        .scenario-card:hover .scenario-overlay {
            background: linear-gradient(transparent, rgba(10, 14, 23, 0.95));
        }

        .scenario-learn-more {
            opacity: 0;
            transform: translateY(8px);
            transition: all var(--transition-smooth);
            color: var(--primary);
            font-weight: 600;
            font-size: 14px;
        }

        .scenario-card:hover .scenario-learn-more {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== 区块背景交替 ===== */
        .bg-dark-card {
            background-color: var(--dark-card);
        }
        .bg-dark-alt {
            background-color: var(--dark-alt);
        }

        /* ===== CTA Final ===== */
        .cta-final-section {
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .cta-final-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(10, 14, 23, 0.82);
            z-index: 1;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #080C13;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }

        .social-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-fast);
            color: rgba(255, 255, 255, 0.5);
            font-size: 16px;
            cursor: pointer;
            background: transparent;
        }

        .social-icon:hover {
            border-color: var(--primary);
            background: rgba(0, 240, 255, 0.12);
            color: #fff;
            box-shadow: 0 0 16px var(--primary-glow);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .section-padding {
                padding: 80px 0;
            }
            .nav-links {
                gap: 28px;
            }
            .nav-links a {
                font-size: 14px;
            }
            .hero-section {
                min-height: 80vh;
            }
            h1 {
                font-size: 38px !important;
                line-height: 1.2 !important;
            }
            h2 {
                font-size: 28px !important;
            }
            h3 {
                font-size: 20px !important;
            }
            .feature-card-grid {
                grid-template-columns: repeat(2, 1fr) !important;
            }
        }

        @media (max-width: 768px) {
            .section-padding {
                padding: 60px 0;
            }
            .nav-links {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .hero-section {
                min-height: 85vh;
                text-align: center;
                background-position: 45% center;
            }
            .hero-content .flex {
                flex-direction: column;
                align-items: center;
                gap: 16px;
            }
            h1 {
                font-size: 30px !important;
                line-height: 1.25 !important;
            }
            h2 {
                font-size: 24px !important;
            }
            h3 {
                font-size: 18px !important;
            }
            .feature-card-grid {
                grid-template-columns: 1fr !important;
            }
            .product-row {
                flex-direction: column !important;
                gap: 32px !important;
            }
            .product-row.reverse {
                flex-direction: column-reverse !important;
            }
            .product-row img {
                width: 100% !important;
                max-width: 400px !important;
                margin: 0 auto;
            }
            .scenario-grid {
                grid-template-columns: 1fr !important;
            }
            .case-grid {
                grid-template-columns: 1fr !important;
            }
            .pricing-grid {
                grid-template-columns: 1fr !important;
                max-width: 420px !important;
                margin: 0 auto !important;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }
            .btn-primary,
            .btn-outline,
            .btn-accent {
                padding: 12px 24px;
                font-size: 15px;
                min-height: 44px;
            }
            .site-header {
                height: 60px;
            }
            .nav-brand {
                font-size: 17px;
            }
            .nav-brand .brand-icon {
                width: 28px;
                height: 28px;
            }
            .nav-brand .brand-icon::after {
                width: 7px;
                height: 7px;
                top: 5px;
            }
            html {
                scroll-padding-top: 68px;
            }
        }

        @media (max-width: 520px) {
            h1 {
                font-size: 26px !important;
            }
            h2 {
                font-size: 21px !important;
            }
            h3 {
                font-size: 17px !important;
            }
            .section-container {
                padding: 0 16px;
            }
            .glass-card {
                padding: 20px !important;
            }
            .hero-particles {
                display: none;
            }
            .scenario-card {
                min-height: 260px;
            }
            .scenario-card img {
                height: 160px;
            }
            .faq-question {
                font-size: 14px;
                padding: 14px 14px;
            }
        }

        /* ===== 发光数字 ===== */
        .glow-number {
            color: var(--primary);
            text-shadow: 0 0 20px var(--primary-glow), 0 0 40px rgba(0, 240, 255, 0.25);
            font-weight: 800;
        }

        /* ===== 标签 ===== */
        .tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: var(--radius-tag);
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.3px;
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: var(--primary);
            background: rgba(0, 240, 255, 0.06);
        }

        .tag-accent {
            border-color: rgba(255, 77, 109, 0.3);
            color: var(--accent);
            background: rgba(255, 77, 109, 0.06);
        }

        /* ===== 排名徽章 ===== */
        .rank-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            font-weight: 700;
            font-size: 16px;
            font-family: 'Inter', 'PingFang SC', sans-serif;
            border: 2px solid;
            flex-shrink: 0;
        }
        .rank-1 {
            border-color: #FFD700;
            color: #FFD700;
            box-shadow: 0 0 16px rgba(255, 215, 0, 0.3);
            background: rgba(255, 215, 0, 0.06);
        }
        .rank-2 {
            border-color: #C0C0C0;
            color: #C0C0C0;
            box-shadow: 0 0 12px rgba(192, 192, 192, 0.25);
            background: rgba(192, 192, 192, 0.04);
        }
        .rank-3 {
            border-color: #CD7F32;
            color: #CD7F32;
            box-shadow: 0 0 10px rgba(205, 127, 50, 0.25);
            background: rgba(205, 127, 50, 0.04);
        }

        /* focus */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: 4px;
        }