/* roulang page: index */
:root {
            --electric-purple: #8A2BE2;
            --neon-cyan: #00F0FF;
            --lightning-orange: #FF4D00;
            --deep-base: #0A0A0F;
            --card-bg: #10101A;
            --card-alt: #141428;
            --glass-bg: rgba(30, 30, 60, 0.8);
            --text-white: #FFFFFF;
            --text-light: #B0B0C0;
            --text-body: #8A8A9A;
            --border-glow: rgba(138, 43, 226, 0.3);
            --radius-lg: 20px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-glow: 0 0 30px rgba(138, 43, 226, 0.25);
            --shadow-cyan: 0 0 20px rgba(0, 240, 255, 0.3);
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 80px;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            background-color: var(--deep-base);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: var(--neon-cyan);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
        }
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        /* 容器 */
        .container-custom {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }
        @media (min-width: 768px) {
            .container-custom {
                padding-left: 2.5rem;
                padding-right: 2.5rem;
            }
        }
        @media (min-width: 1024px) {
            .container-custom {
                padding-left: 3rem;
                padding-right: 3rem;
            }
        }

        /* 导航 */
        #main-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 10, 20, 0.75);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid transparent;
            background-image: linear-gradient(rgba(10, 10, 20, 0.75), rgba(10, 10, 20, 0.75)),
                linear-gradient(90deg, var(--electric-purple), var(--neon-cyan));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            border-bottom: 1px solid transparent;
            transition: all 0.3s ease;
        }
        #main-nav.scrolled {
            background: rgba(10, 10, 15, 0.92);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        @media (min-width: 768px) {
            .nav-inner {
                padding: 0 2.5rem;
                height: 72px;
            }
        }
        @media (min-width: 1024px) {
            .nav-inner {
                padding: 0 3rem;
            }
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 800;
            font-size: 1.35rem;
            color: #FFFFFF;
            white-space: nowrap;
            letter-spacing: 0.02em;
        }
        .nav-logo .logo-icon {
            color: var(--neon-cyan);
            font-size: 1.3rem;
            animation: logo-pulse 2.5s ease-in-out infinite;
        }
        @keyframes logo-pulse {
            0%,
            100% {
                text-shadow: 0 0 8px rgba(0, 240, 255, 0.6);
            }
            50% {
                text-shadow: 0 0 22px rgba(0, 240, 255, 1), 0 0 40px rgba(138, 43, 226, 0.5);
            }
        }
        .nav-links-desktop {
            display: none;
            list-style: none;
            margin: 0;
            padding: 0;
            gap: 0.25rem;
            align-items: center;
        }
        @media (min-width: 1024px) {
            .nav-links-desktop {
                display: flex;
            }
        }
        .nav-links-desktop li a {
            display: inline-block;
            padding: 0.55rem 1rem;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.9rem;
            color: #B0B0C0;
            position: relative;
            transition: color 0.3s ease;
            letter-spacing: 0.01em;
        }
        .nav-links-desktop li a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 1rem;
            right: 1rem;
            height: 2px;
            background: var(--neon-cyan);
            border-radius: 2px;
            transform: scaleX(0);
            transition: transform 0.3s ease;
            transform-origin: left;
        }
        .nav-links-desktop li a:hover {
            color: #FFFFFF;
        }
        .nav-links-desktop li a:hover::after {
            transform: scaleX(1);
        }
        .nav-links-desktop li a.nav-active {
            color: var(--electric-purple);
            font-weight: 700;
        }
        .nav-links-desktop li a.nav-active::after {
            background: var(--electric-purple);
            transform: scaleX(1);
        }

        /* 移动端胶囊菜单按钮 */
        .mobile-menu-fab {
            display: flex;
            position: fixed;
            bottom: 24px;
            right: 24px;
            z-index: 1100;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--electric-purple), #6A1BC4);
            border: 2px solid rgba(0, 240, 255, 0.4);
            box-shadow: 0 0 24px rgba(138, 43, 226, 0.5), 0 0 8px rgba(0, 240, 255, 0.25);
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s ease;
            color: #FFFFFF;
            font-size: 1.5rem;
        }
        .mobile-menu-fab:hover {
            box-shadow: 0 0 36px rgba(138, 43, 226, 0.7), 0 0 16px rgba(0, 240, 255, 0.5);
            border-color: var(--neon-cyan);
        }
        @media (min-width: 1024px) {
            .mobile-menu-fab {
                display: none;
            }
        }
        /* 移动端全屏菜单 */
        #mobile-overlay {
            position: fixed;
            inset: 0;
            z-index: 1050;
            background: rgba(5, 5, 15, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.35s ease;
        }
        #mobile-overlay.active {
            opacity: 1;
            pointer-events: auto;
        }
        #mobile-overlay .close-btn {
            position: absolute;
            top: 28px;
            right: 28px;
            font-size: 2rem;
            color: #FFFFFF;
            cursor: pointer;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            transition: all 0.3s ease;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        #mobile-overlay .close-btn:hover {
            background: rgba(255, 255, 255, 0.14);
            border-color: var(--neon-cyan);
            color: var(--neon-cyan);
        }
        #mobile-overlay .mobile-nav-list {
            list-style: none;
            margin: 0;
            padding: 0;
            text-align: center;
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        #mobile-overlay .mobile-nav-list li a {
            display: block;
            font-size: 1.4rem;
            font-weight: 700;
            color: #B0B0C0;
            padding: 0.75rem 2rem;
            border-radius: 12px;
            transition: all 0.3s ease;
            letter-spacing: 0.02em;
        }
        #mobile-overlay .mobile-nav-list li a:hover,
        #mobile-overlay .mobile-nav-list li a.mob-nav-active {
            color: var(--neon-cyan);
            background: rgba(138, 43, 226, 0.15);
        }

        /* Hero */
        #hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            background: var(--deep-base);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }
        #hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 10, 20, 0.65) 0%, rgba(10, 10, 18, 0.82) 40%, rgba(10, 10, 15, 0.9) 100%);
            z-index: 1;
        }
        #hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                radial-gradient(circle at 20% 30%, rgba(138, 43, 226, 0.18) 0%, transparent 55%),
                radial-gradient(circle at 75% 60%, rgba(0, 240, 255, 0.12) 0%, transparent 50%),
                radial-gradient(circle at 50% 80%, rgba(255, 77, 0, 0.07) 0%, transparent 40%);
            z-index: 2;
            pointer-events: none;
        }
        /* 粒子光点 */
        .particle {
            position: absolute;
            border-radius: 50%;
            pointer-events: none;
            z-index: 3;
            animation: float-particle 6s ease-in-out infinite;
        }
        .particle:nth-child(1) {
            width: 6px;
            height: 6px;
            background: rgba(0, 240, 255, 0.7);
            top: 18%;
            left: 12%;
            animation-delay: 0s;
            animation-duration: 7s;
        }
        .particle:nth-child(2) {
            width: 4px;
            height: 4px;
            background: rgba(138, 43, 226, 0.8);
            top: 55%;
            left: 78%;
            animation-delay: 1.5s;
            animation-duration: 5.5s;
        }
        .particle:nth-child(3) {
            width: 5px;
            height: 5px;
            background: rgba(255, 77, 0, 0.6);
            top: 32%;
            left: 48%;
            animation-delay: 3s;
            animation-duration: 6.5s;
        }
        .particle:nth-child(4) {
            width: 3px;
            height: 3px;
            background: rgba(0, 240, 255, 0.9);
            top: 70%;
            left: 22%;
            animation-delay: 2s;
            animation-duration: 8s;
        }
        .particle:nth-child(5) {
            width: 7px;
            height: 7px;
            background: rgba(138, 43, 226, 0.55);
            top: 14%;
            left: 62%;
            animation-delay: 4s;
            animation-duration: 5s;
        }
        @keyframes float-particle {
            0%,
            100% {
                transform: translate(0, 0) scale(1);
                opacity: 0.6;
            }
            25% {
                transform: translate(30px, -50px) scale(1.8);
                opacity: 1;
            }
            50% {
                transform: translate(-20px, -20px) scale(0.7);
                opacity: 0.35;
            }
            75% {
                transform: translate(15px, 35px) scale(1.4);
                opacity: 0.8;
            }
        }

        .hero-content {
            position: relative;
            z-index: 5;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 2rem;
            width: 100%;
            padding-top: 6rem;
            padding-bottom: 3rem;
        }
        @media (min-width: 1024px) {
            .hero-content {
                flex-direction: row;
                align-items: center;
                gap: 3rem;
                padding-top: 5rem;
                padding-bottom: 4rem;
            }
        }
        .hero-text {
            flex: 1;
            max-width: 620px;
        }
        .hero-text h1 {
            font-size: clamp(2.2rem, 5vw, 4.2rem);
            font-weight: 800;
            line-height: 1.2;
            color: #FFFFFF;
            margin: 0 0 1.25rem;
            letter-spacing: -0.01em;
        }
        .hero-text h1 .gradient-text {
            background: linear-gradient(135deg, var(--electric-purple) 0%, var(--neon-cyan) 60%, #C084FC 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            display: inline;
        }
        .hero-text .hero-subtitle {
            font-size: 1.2rem;
            color: #B0B0C0;
            max-width: 540px;
            margin: 0 0 2rem;
            line-height: 1.65;
        }
        @media (min-width: 768px) {
            .hero-text .hero-subtitle {
                font-size: 1.3rem;
            }
        }
        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.85rem 2rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            letter-spacing: 0.02em;
            background: linear-gradient(135deg, #8A2BE2 0%, #6D1FC0 100%);
            color: #FFFFFF;
            border: none;
            cursor: pointer;
            transition: all 0.35s ease;
            box-shadow: 0 0 20px rgba(138, 43, 226, 0.4), 0 0 0px rgba(0, 240, 255, 0);
            position: relative;
            overflow: hidden;
            text-decoration: none;
        }
        .btn-primary:hover {
            box-shadow: 0 0 35px rgba(138, 43, 226, 0.65), 0 0 18px rgba(0, 240, 255, 0.4);
            transform: translateY(-2px);
            color: #FFFFFF;
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 15px rgba(138, 43, 226, 0.3);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.85rem 2rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            letter-spacing: 0.02em;
            background: transparent;
            color: #FFFFFF;
            border: 2px solid rgba(255, 255, 255, 0.35);
            cursor: pointer;
            transition: all 0.35s ease;
            text-decoration: none;
        }
        .btn-outline:hover {
            border-color: var(--neon-cyan);
            color: var(--neon-cyan);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.25);
            transform: translateY(-2px);
        }
        .hero-visual {
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            min-width: 280px;
            max-width: 500px;
            width: 100%;
        }
        .hero-visual img {
            border-radius: 20px;
            box-shadow: 0 0 60px rgba(138, 43, 226, 0.3), 0 0 30px rgba(0, 240, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.1);
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 4/3;
        }
        @media (max-width: 1023px) {
            .hero-visual {
                max-width: 100%;
            }
            .hero-visual img {
                aspect-ratio: 16/9;
            }
        }

        /* 区块通用 */
        .section-block {
            padding: 4rem 0;
        }
        @media (min-width: 768px) {
            .section-block {
                padding: 5.5rem 0;
            }
        }
        @media (min-width: 1024px) {
            .section-block {
                padding: 7rem 0;
            }
        }
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--neon-cyan);
            margin-bottom: 0.75rem;
            padding: 0.3rem 0.9rem;
            border-radius: 20px;
            background: rgba(0, 240, 255, 0.08);
            border: 1px solid rgba(0, 240, 255, 0.2);
        }
        .section-title {
            font-size: clamp(1.6rem, 3.5vw, 2.5rem);
            font-weight: 800;
            color: #FFFFFF;
            margin: 0 0 0.75rem;
            letter-spacing: -0.01em;
            line-height: 1.25;
        }
        .section-desc {
            font-size: 1.05rem;
            color: #B0B0C0;
            max-width: 620px;
            margin: 0 auto 2.5rem;
            line-height: 1.6;
        }
        @media (min-width: 768px) {
            .section-desc {
                margin-bottom: 3.5rem;
                font-size: 1.1rem;
            }
        }

        /* 功能卡片网格 - 非对称 */
        .features-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.25rem;
        }
        @media (min-width: 640px) {
            .features-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1.5rem;
            }
        }
        @media (min-width: 1024px) {
            .features-grid {
                grid-template-columns: 1.4fr 1fr 1fr;
                grid-template-rows: auto auto;
                gap: 1.5rem;
            }
            .features-grid .feat-card:nth-child(1) {
                grid-row: span 2;
            }
            .features-grid .feat-card:nth-child(2) {
                grid-column: 2;
            }
            .features-grid .feat-card:nth-child(3) {
                grid-column: 3;
            }
            .features-grid .feat-card:nth-child(4) {
                grid-column: 2;
            }
            .features-grid .feat-card:nth-child(5) {
                grid-column: 3;
            }
            .features-grid .feat-card:nth-child(6) {
                grid-column: 1 / -1;
            }
        }
        .feat-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            padding: 1.75rem;
            border: 1px solid rgba(138, 43, 226, 0.2);
            transition: all 0.35s ease;
            position: relative;
            overflow: hidden;
            cursor: default;
        }
        .feat-card::before {
            content: '';
            position: absolute;
            bottom: 0;
            left: 10%;
            right: 10%;
            height: 3px;
            background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.4), transparent);
            border-radius: 3px;
            opacity: 0;
            transition: opacity 0.35s ease;
        }
        .feat-card:hover {
            transform: translateY(-6px);
            border-color: rgba(0, 240, 255, 0.5);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5), 0 0 30px rgba(138, 43, 226, 0.2);
        }
        .feat-card:hover::before {
            opacity: 1;
        }
        .feat-card .feat-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, rgba(138, 43, 226, 0.3), rgba(0, 240, 255, 0.15));
            color: var(--neon-cyan);
            border: 1px solid rgba(0, 240, 255, 0.25);
        }
        .feat-card h3 {
            font-weight: 700;
            font-size: 1.15rem;
            color: #FFFFFF;
            margin: 0 0 0.5rem;
        }
        .feat-card p {
            font-size: 0.9rem;
            color: #8A8A9A;
            margin: 0;
            line-height: 1.55;
            max-width: 40ch;
        }
        @media (min-width: 1024px) {
            .feat-card:nth-child(1) {
                padding: 2.5rem;
            }
            .feat-card:nth-child(1) .feat-icon {
                width: 60px;
                height: 60px;
                font-size: 1.7rem;
                border-radius: 18px;
            }
            .feat-card:nth-child(1) h3 {
                font-size: 1.35rem;
            }
            .feat-card:nth-child(1) p {
                font-size: 1rem;
            }
        }

        /* 场景画廊 */
        .scenarios-scroll {
            display: flex;
            gap: 1.25rem;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
            padding-bottom: 0.75rem;
            scrollbar-width: thin;
            scrollbar-color: rgba(138, 43, 226, 0.4) transparent;
        }
        .scenarios-scroll::-webkit-scrollbar {
            height: 5px;
        }
        .scenarios-scroll::-webkit-scrollbar-track {
            background: transparent;
        }
        .scenarios-scroll::-webkit-scrollbar-thumb {
            background: rgba(138, 43, 226, 0.5);
            border-radius: 10px;
        }
        .scene-card {
            flex: 0 0 300px;
            scroll-snap-align: start;
            border-radius: var(--radius-lg);
            overflow: hidden;
            position: relative;
            min-height: 280px;
            background: var(--card-bg);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all 0.35s ease;
            cursor: pointer;
        }
        @media (min-width: 640px) {
            .scene-card {
                flex: 0 0 360px;
                min-height: 320px;
            }
        }
        @media (min-width: 768px) {
            .scene-card {
                flex: 0 0 380px;
                min-height: 360px;
            }
        }
        @media (max-width: 639px) {
            .scene-card {
                flex: 0 0 85vw;
                min-height: 260px;
            }
        }
        .scene-card:hover {
            border-color: rgba(0, 240, 255, 0.5);
            box-shadow: 0 12px 35px rgba(0, 0, 0, 0.55);
            transform: translateY(-4px);
        }
        .scene-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            z-index: 0;
        }
        .scene-card .scene-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(10, 10, 15, 0.95) 0%, rgba(10, 10, 15, 0.3) 50%, rgba(10, 10, 15, 0.05) 100%);
            z-index: 1;
        }
        .scene-card .scene-info {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 2;
            padding: 1.5rem;
        }
        .scene-card .scene-info h4 {
            color: #FFFFFF;
            font-weight: 700;
            font-size: 1.2rem;
            margin: 0 0 0.35rem;
        }
        .scene-card .scene-info span {
            color: #B0B0C0;
            font-size: 0.85rem;
        }

        /* 案例数字墙 */
        .stats-wall {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.25rem;
            margin-bottom: 3rem;
        }
        @media (min-width: 640px) {
            .stats-wall {
                grid-template-columns: repeat(4, 1fr);
                gap: 1.5rem;
            }
        }
        .stat-item {
            text-align: center;
            padding: 1.5rem 1rem;
            background: rgba(20, 20, 40, 0.7);
            border-radius: var(--radius-md);
            border: 1px solid rgba(138, 43, 226, 0.2);
        }
        .stat-item .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--electric-purple);
            font-variant-numeric: tabular-nums;
            letter-spacing: -0.01em;
            line-height: 1.1;
        }
        @media (min-width: 768px) {
            .stat-item .stat-number {
                font-size: 2.8rem;
            }
        }
        .stat-item .stat-label {
            font-size: 0.85rem;
            color: #8A8A9A;
            margin-top: 0.35rem;
        }
        .case-cards {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }
        @media (min-width: 768px) {
            .case-cards {
                grid-template-columns: 1fr 1fr;
            }
        }
        .case-card {
            display: flex;
            flex-direction: column;
            background: rgba(20, 20, 40, 0.7);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.07);
            transition: all 0.35s ease;
        }
        @media (min-width: 640px) {
            .case-card {
                flex-direction: row;
            }
        }
        .case-card:hover {
            border-color: rgba(138, 43, 226, 0.4);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
        }
        .case-card .case-media {
            flex: 0 0 45%;
            min-height: 180px;
            overflow: hidden;
        }
        .case-card .case-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .case-card:hover .case-media img {
            transform: scale(1.04);
        }
        .case-card .case-body {
            flex: 1;
            padding: 1.5rem;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .case-card .case-body .case-quote {
            font-style: italic;
            color: #B0B0C0;
            font-size: 0.95rem;
            line-height: 1.6;
            margin-bottom: 0.75rem;
            position: relative;
            padding-left: 1rem;
            border-left: 3px solid var(--electric-purple);
        }
        .case-card .case-body .case-author {
            font-weight: 700;
            color: #FFFFFF;
            font-size: 0.9rem;
        }

        /* 价格双列对比 */
        .pricing-duo {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
            max-width: 900px;
            margin: 0 auto;
        }
        @media (min-width: 768px) {
            .pricing-duo {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
        }
        .pricing-card {
            background: rgba(20, 20, 40, 0.7);
            border-radius: var(--radius-lg);
            padding: 2rem;
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all 0.35s ease;
            position: relative;
            display: flex;
            flex-direction: column;
        }
        .pricing-card.recommended {
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(20, 20, 40, 0.9), rgba(20, 20, 40, 0.9)),
                linear-gradient(135deg, var(--electric-purple), var(--neon-cyan));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            box-shadow: 0 0 35px rgba(138, 43, 226, 0.3);
        }
        .pricing-card .pricing-badge {
            position: absolute;
            top: -14px;
            right: 20px;
            background: var(--lightning-orange);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 0.75rem;
            padding: 0.35rem 1rem;
            border-radius: 20px;
            letter-spacing: 0.04em;
            box-shadow: 0 4px 15px rgba(255, 77, 0, 0.4);
        }
        .pricing-card h3 {
            font-size: 1.4rem;
            font-weight: 800;
            color: #FFFFFF;
            margin: 0 0 0.5rem;
        }
        .pricing-card .price-amount {
            font-size: 2.5rem;
            font-weight: 800;
            color: #FFFFFF;
            margin: 0.5rem 0 1.25rem;
            letter-spacing: -0.02em;
        }
        .pricing-card .price-amount span {
            font-size: 0.9rem;
            font-weight: 500;
            color: #8A8A9A;
        }
        .pricing-card ul {
            list-style: none;
            margin: 0 0 1.5rem;
            padding: 0;
            flex: 1;
        }
        .pricing-card ul li {
            padding: 0.55rem 0;
            font-size: 0.9rem;
            color: #B0B0C0;
            display: flex;
            align-items: center;
            gap: 0.6rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .pricing-card ul li .check-icon {
            color: var(--neon-cyan);
            font-size: 0.85rem;
        }
        .pricing-card ul li .minus-icon {
            color: #555;
            font-size: 0.85rem;
        }
        .pricing-card .btn-full {
            width: 100%;
            text-align: center;
            padding: 0.85rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            letter-spacing: 0.02em;
            cursor: pointer;
            transition: all 0.35s ease;
            border: none;
            text-decoration: none;
            display: inline-block;
        }
        .pricing-card .btn-full.btn-glow {
            background: linear-gradient(135deg, #8A2BE2 0%, #6D1FC0 100%);
            color: #FFFFFF;
            box-shadow: 0 0 20px rgba(138, 43, 226, 0.35);
        }
        .pricing-card .btn-full.btn-glow:hover {
            box-shadow: 0 0 35px rgba(138, 43, 226, 0.6), 0 0 18px rgba(0, 240, 255, 0.35);
        }
        .pricing-card .btn-full.btn-soft {
            background: rgba(255, 255, 255, 0.06);
            color: #FFFFFF;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        .pricing-card .btn-full.btn-soft:hover {
            border-color: var(--neon-cyan);
            color: var(--neon-cyan);
            background: rgba(0, 240, 255, 0.06);
        }

        /* FAQ手风琴 */
        .faq-group-label {
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.07em;
            text-transform: uppercase;
            color: var(--neon-cyan);
            margin: 1.75rem 0 0.75rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid rgba(0, 240, 255, 0.2);
        }
        .faq-group-label:first-child {
            margin-top: 0;
        }
        .faq-item {
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            overflow: hidden;
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 1.1rem 0;
            font-weight: 700;
            font-size: 1rem;
            color: #B0B0C0;
            background: transparent;
            border: none;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            transition: color 0.3s ease;
            letter-spacing: 0.01em;
        }
        .faq-question:hover {
            color: #FFFFFF;
        }
        .faq-question.open {
            color: var(--neon-cyan);
        }
        .faq-question .faq-arrow {
            display: inline-block;
            font-size: 0.8rem;
            transition: transform 0.35s ease;
            flex-shrink: 0;
            color: #8A8A9A;
        }
        .faq-question.open .faq-arrow {
            transform: rotate(90deg);
            color: var(--neon-cyan);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.45s ease, padding 0.35s ease;
        }
        .faq-answer.open {
            max-height: 220px;
        }
        .faq-answer .faq-answer-inner {
            padding: 0 0 1.1rem;
            color: #8A8A9A;
            font-size: 0.9rem;
            line-height: 1.65;
        }

        /* Contact + 页脚 */
        #contact {
            background: var(--deep-base);
            position: relative;
            overflow: hidden;
        }
        #contact::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                radial-gradient(circle at 30% 20%, rgba(138, 43, 226, 0.08) 0%, transparent 55%),
                radial-gradient(circle at 70% 70%, rgba(0, 240, 255, 0.05) 0%, transparent 50%);
            pointer-events: none;
            z-index: 1;
        }
        /* 网格纹 */
        #contact::after {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
            background-size: 40px 40px;
            pointer-events: none;
            z-index: 2;
        }
        .contact-inner {
            position: relative;
            z-index: 3;
            display: grid;
            grid-template-columns: 1fr;
            gap: 2.5rem;
        }
        @media (min-width: 768px) {
            .contact-inner {
                grid-template-columns: 1fr 1.2fr;
                gap: 3rem;
            }
        }
        .contact-info h3 {
            font-weight: 800;
            font-size: 1.5rem;
            color: #FFFFFF;
            margin: 0 0 0.75rem;
        }
        .contact-info .brand-desc {
            color: #8A8A9A;
            font-size: 0.9rem;
            line-height: 1.6;
            margin-bottom: 1.5rem;
            max-width: 400px;
        }
        .contact-info .info-line {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            color: #B0B0C0;
            font-size: 0.9rem;
            margin-bottom: 0.6rem;
        }
        .contact-info .info-line i {
            color: var(--neon-cyan);
            width: 20px;
            text-align: center;
        }
        .social-icons {
            display: flex;
            gap: 0.75rem;
            margin-top: 1.25rem;
        }
        .social-icons a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: #B0B0C0;
            transition: all 0.3s ease;
            font-size: 1rem;
        }
        .social-icons a:hover {
            background: rgba(138, 43, 226, 0.2);
            border-color: var(--neon-cyan);
            color: var(--neon-cyan);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.25);
        }
        .contact-form {
            background: rgba(20, 20, 40, 0.7);
            border-radius: var(--radius-lg);
            padding: 2rem;
            border: 1px solid rgba(138, 43, 226, 0.2);
            backdrop-filter: blur(10px);
        }
        .contact-form .form-group {
            margin-bottom: 1rem;
        }
        .contact-form label {
            display: block;
            font-weight: 600;
            font-size: 0.85rem;
            color: #B0B0C0;
            margin-bottom: 0.35rem;
            letter-spacing: 0.01em;
        }
        .contact-form input,
        .contact-form select {
            width: 100%;
            padding: 0.75rem 1rem;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(138, 43, 226, 0.3);
            background: rgba(10, 10, 20, 0.7);
            color: #FFFFFF;
            font-size: 0.95rem;
            transition: all 0.3s ease;
            outline: none;
        }
        .contact-form input:focus,
        .contact-form select:focus {
            border-color: var(--neon-cyan);
            box-shadow: 0 0 16px rgba(0, 240, 255, 0.3), 0 0 0 3px rgba(0, 240, 255, 0.06);
        }
        .contact-form .btn-submit {
            width: 100%;
            padding: 0.85rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            letter-spacing: 0.02em;
            background: linear-gradient(135deg, #8A2BE2 0%, #6D1FC0 100%);
            color: #FFFFFF;
            border: none;
            cursor: pointer;
            transition: all 0.35s ease;
            box-shadow: 0 0 18px rgba(138, 43, 226, 0.35);
        }
        .contact-form .btn-submit:hover {
            box-shadow: 0 0 35px rgba(138, 43, 226, 0.6), 0 0 18px rgba(0, 240, 255, 0.4);
            transform: translateY(-2px);
        }

        /* 页脚 */
        .site-footer {
            text-align: center;
            padding: 2rem 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            position: relative;
            z-index: 3;
            color: #6A6A7A;
            font-size: 0.85rem;
        }
        .site-footer a {
            color: #8A8A9A;
            transition: color 0.3s ease;
        }
        .site-footer a:hover {
            color: var(--neon-cyan);
        }

        /* 返回顶部 */
        #back-to-top {
            position: fixed;
            bottom: 90px;
            right: 28px;
            z-index: 900;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(20, 20, 40, 0.8);
            border: 1px solid rgba(255, 255, 255, 0.15);
            color: #B0B0C0;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            opacity: 0;
            pointer-events: none;
            transition: all 0.35s ease;
            font-size: 1rem;
        }
        #back-to-top.visible {
            opacity: 1;
            pointer-events: auto;
        }
        #back-to-top:hover {
            border-color: var(--neon-cyan);
            color: var(--neon-cyan);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
        }
        @media (min-width: 1024px) {
            #back-to-top {
                bottom: 30px;
                right: 30px;
            }
        }

        /* 脉冲呼吸动画 */
        @keyframes breathe-glow {
            0%,
            100% {
                box-shadow: 0 0 20px rgba(138, 43, 226, 0.4), 0 0 0px rgba(0, 240, 255, 0);
            }
            50% {
                box-shadow: 0 0 38px rgba(138, 43, 226, 0.7), 0 0 22px rgba(0, 240, 255, 0.5);
            }
        }
        .animate-breathe {
            animation: breathe-glow 2.8s ease-in-out infinite;
        }