/* roulang page: index */
:root {
            --brand-purple: #6C3CFA;
            --brand-cyan: #00E5FF;
            --brand-orange: #FF6B35;
            --deep-black: #0F0F1A;
            --card-bg: #1A1A2D;
            --card-hover: #24223B;
            --text-base: #E4E7F0;
            --text-muted: #9CA3B8;
            --border-subtle: rgba(108, 60, 250, 0.15);
            --border-glow: rgba(108, 60, 250, 0.35);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 16px 48px rgba(108, 60, 250, 0.15);
            --shadow-badge: 0 2px 8px rgba(108, 60, 250, 0.2);
            --radius-card: 24px;
            --radius-btn: 50px;
            --radius-input: 14px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-bounce: 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
            --container-max: 1280px;
            --section-gap: 120px;
            --card-gap: 24px;
        }

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

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

        body {
            font-family: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            font-weight: 400;
            line-height: 1.6;
            color: var(--text-base);
            background-color: var(--deep-black);
            margin: 0;
            padding: 0;
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

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

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

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--brand-cyan);
            outline-offset: 2px;
            box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.35);
        }

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

        @media (min-width: 1024px) {
            .container-custom {
                padding-left: 40px;
                padding-right: 40px;
            }
        }

        /* ===== 导航 ===== */
        #main-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(15, 15, 26, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid transparent;
            transition: background var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
        }

        #main-nav.scrolled {
            background: #0F0F1A;
            border-bottom: 1px solid rgba(108, 60, 250, 0.3);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
        }

        #main-nav .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }

        @media (min-width: 1024px) {
            #main-nav .nav-inner {
                padding: 0 40px;
            }
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.25rem;
            color: #fff;
            letter-spacing: 0.5px;
            white-space: nowrap;
            z-index: 1002;
        }

        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-purple), var(--brand-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            flex-shrink: 0;
            box-shadow: 0 4px 16px rgba(108, 60, 250, 0.4);
        }

        .nav-links-desktop {
            display: none;
            align-items: center;
            gap: 28px;
        }

        @media (min-width: 1024px) {
            .nav-links-desktop {
                display: flex;
            }
        }

        .nav-links-desktop a {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-muted);
            letter-spacing: 0.3px;
            position: relative;
            padding: 4px 0;
            transition: color var(--transition-fast);
        }

        .nav-links-desktop a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--brand-purple), var(--brand-cyan));
            border-radius: 2px;
            transition: width var(--transition-smooth);
        }

        .nav-links-desktop a:hover,
        .nav-links-desktop a:focus {
            color: #fff;
        }
        .nav-links-desktop a:hover::after,
        .nav-links-desktop a:focus::after {
            width: 100%;
        }

        .nav-cta-desktop {
            display: none;
        }

        @media (min-width: 1024px) {
            .nav-cta-desktop {
                display: inline-flex;
            }
        }

        .btn-primary-sm {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.85rem;
            letter-spacing: 0.3px;
            background: linear-gradient(135deg, var(--brand-purple), var(--brand-cyan));
            color: #fff;
            white-space: nowrap;
            transition: all var(--transition-smooth);
            box-shadow: 0 4px 20px rgba(108, 60, 250, 0.3);
            border: none;
            cursor: pointer;
        }

        .btn-primary-sm:hover {
            transform: scale(1.04);
            box-shadow: 0 8px 32px rgba(108, 60, 250, 0.5);
            background: linear-gradient(180deg, var(--brand-purple), var(--brand-cyan));
        }

        .hamburger-btn {
            display: flex;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            z-index: 1002;
            width: 40px;
            height: 32px;
            justify-content: center;
            align-items: center;
        }

        @media (min-width: 1024px) {
            .hamburger-btn {
                display: none;
            }
        }

        .hamburger-btn span {
            display: block;
            width: 24px;
            height: 2.5px;
            background: #fff;
            border-radius: 2px;
            transition: all var(--transition-smooth);
            transform-origin: center;
        }

        .hamburger-btn.active span:nth-child(1) {
            transform: translateY(7.5px) rotate(45deg);
        }
        .hamburger-btn.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .hamburger-btn.active span:nth-child(3) {
            transform: translateY(-7.5px) rotate(-45deg);
        }

        /* 移动端抽屉 */
        .mobile-drawer {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: #0F0F1A;
            z-index: 1001;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 32px;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-smooth);
            border: 2px solid transparent;
        }

        .mobile-drawer.open {
            opacity: 1;
            pointer-events: auto;
            border-image: linear-gradient(180deg, var(--brand-purple), var(--brand-cyan)) 1;
            border-radius: 0;
            border-left: none;
            border-right: none;
            border-top: none;
            border-bottom-width: 3px;
            border-bottom-style: solid;
            border-bottom-color: transparent;
            background-clip: padding-box;
        }

        @media (min-width: 1024px) {
            .mobile-drawer {
                display: none;
            }
        }

        .mobile-drawer a {
            font-size: 1.3rem;
            font-weight: 600;
            color: #fff;
            letter-spacing: 0.5px;
            transition: color var(--transition-fast);
        }
        .mobile-drawer a:hover {
            color: var(--brand-cyan);
        }

        .mobile-drawer .btn-primary-sm {
            font-size: 1rem;
            padding: 14px 32px;
            margin-top: 8px;
        }

        /* ===== 区块通用 ===== */
        section {
            position: relative;
            padding-top: var(--section-gap);
            padding-bottom: var(--section-gap);
        }

        @media (max-width: 768px) {
            section {
                padding-top: 80px;
                padding-bottom: 80px;
            }
            :root {
                --section-gap: 80px;
            }
        }

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 1.5px;
            text-transform: uppercase;
            color: var(--brand-orange);
            background: rgba(255, 107, 53, 0.1);
            padding: 6px 16px;
            border-radius: 50px;
            margin-bottom: 16px;
        }

        .section-title {
            font-size: 2.5rem;
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: 0.3px;
            color: #fff;
            margin: 0 0 16px;
        }

        @media (max-width: 768px) {
            .section-title {
                font-size: 1.8rem;
            }
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            line-height: 1.6;
            max-width: 600px;
            margin: 0;
        }

        /* ===== Hero ===== */
        #hero {
            padding-top: 140px;
            padding-bottom: 100px;
            min-height: 100vh;
            display: flex;
            align-items: center;
            background:
                radial-gradient(ellipse at 30% 20%, rgba(108, 60, 250, 0.18) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 60%, rgba(0, 229, 255, 0.1) 0%, transparent 55%),
                var(--deep-black);
            position: relative;
            overflow: hidden;
        }

        @media (max-width: 768px) {
            #hero {
                padding-top: 110px;
                padding-bottom: 70px;
                min-height: auto;
            }
        }

        #hero .hero-grid {
            display: flex;
            align-items: center;
            gap: 48px;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }

        @media (min-width: 1024px) {
            #hero .hero-grid {
                padding: 0 40px;
            }
        }

        @media (max-width: 1024px) {
            #hero .hero-grid {
                flex-direction: column;
                text-align: center;
                gap: 36px;
            }
        }

        #hero .hero-left {
            flex: 0 0 58%;
            max-width: 58%;
        }

        @media (max-width: 1024px) {
            #hero .hero-left {
                flex: 1 1 auto;
                max-width: 100%;
                order: 1;
            }
        }

        #hero .hero-right {
            flex: 0 0 38%;
            max-width: 38%;
            position: relative;
        }

        @media (max-width: 1024px) {
            #hero .hero-right {
                flex: 1 1 auto;
                max-width: 85%;
                order: 0;
                margin: 0 auto;
            }
        }

        #hero .hero-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 1.2px;
            color: var(--brand-orange);
            background: rgba(255, 107, 53, 0.12);
            padding: 6px 18px;
            border-radius: 50px;
            margin-bottom: 20px;
        }

        #hero h1 {
            font-size: 3.2rem;
            font-weight: 900;
            line-height: 1.1;
            letter-spacing: 0.2px;
            color: #fff;
            margin: 0 0 20px;
            background: linear-gradient(135deg, #fff 0%, #c8d6ff 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        @media (max-width: 768px) {
            #hero h1 {
                font-size: 2.1rem;
            }
        }

        #hero .hero-desc {
            font-size: 1.05rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0 0 32px;
            max-width: 520px;
        }

        @media (max-width: 1024px) {
            #hero .hero-desc {
                max-width: 100%;
                margin-left: auto;
                margin-right: auto;
            }
        }

        #hero .hero-cta-group {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            align-items: center;
        }

        @media (max-width: 1024px) {
            #hero .hero-cta-group {
                justify-content: center;
            }
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 15px 34px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 0.95rem;
            letter-spacing: 0.4px;
            background: linear-gradient(135deg, var(--brand-purple), var(--brand-cyan));
            color: #fff;
            white-space: nowrap;
            transition: all var(--transition-smooth);
            box-shadow: 0 6px 28px rgba(108, 60, 250, 0.35);
            border: none;
            cursor: pointer;
            text-decoration: none;
        }

        .btn-primary:hover {
            transform: scale(1.03);
            box-shadow: 0 12px 40px rgba(108, 60, 250, 0.55);
            background: linear-gradient(160deg, var(--brand-purple), var(--brand-cyan));
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 15px 34px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 0.95rem;
            letter-spacing: 0.4px;
            background: transparent;
            color: var(--brand-orange);
            border: 2px solid var(--brand-orange);
            white-space: nowrap;
            transition: all var(--transition-smooth);
            cursor: pointer;
            text-decoration: none;
        }

        .btn-outline:hover {
            background: var(--brand-orange);
            color: #fff;
            border-color: var(--brand-orange);
            box-shadow: 0 8px 28px rgba(255, 107, 53, 0.3);
            transform: translateY(-2px);
        }

        #hero .hero-right .hero-image-wrap {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            aspect-ratio: 3/4;
            max-height: 500px;
        }

        @media (max-width: 1024px) {
            #hero .hero-right .hero-image-wrap {
                aspect-ratio: 16/10;
                max-height: 320px;
                border-radius: 20px;
            }
        }

        #hero .hero-right .hero-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
            border-radius: inherit;
        }

        #hero .hero-right .hero-image-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(108, 60, 250, 0.25) 0%, rgba(0, 229, 255, 0.15) 100%);
            pointer-events: none;
            transition: opacity var(--transition-smooth);
            border-radius: inherit;
        }

        #hero .hero-right:hover .hero-image-overlay {
            opacity: 0.5;
        }

        /* Hero底部动画线 */
        #hero .hero-bottom-line {
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--brand-purple), var(--brand-cyan), var(--brand-purple));
            background-size: 200% 100%;
            animation: hero-line-scroll 3s linear infinite;
            opacity: 0.7;
        }

        @keyframes hero-line-scroll {
            0% {
                background-position: 200% 0;
            }
            100% {
                background-position: -200% 0;
            }
        }

        /* ===== 亮点网格 ===== */
        #highlights {
            background: var(--deep-black);
            position: relative;
        }

        #highlights .highlights-header {
            text-align: center;
            margin-bottom: 56px;
        }

        #highlights .highlights-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--card-gap);
            max-width: var(--container-max);
            margin: 0 auto;
        }

        @media (max-width: 1024px) {
            #highlights .highlights-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            #highlights .highlights-grid {
                grid-template-columns: 1fr;
            }
        }

        .highlight-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
            border: 1px solid var(--border-subtle);
            position: relative;
            overflow: hidden;
        }

        .highlight-card:hover {
            background: var(--card-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(108, 60, 250, 0.35);
        }

        .highlight-card .badge-number {
            font-size: 3rem;
            font-weight: 900;
            line-height: 1;
            letter-spacing: -1px;
            background: linear-gradient(135deg, var(--brand-orange), #ff9a66);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 4px;
            display: block;
        }

        .highlight-card .badge-unit {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--brand-cyan);
            letter-spacing: 0.5px;
            display: block;
            margin-bottom: 12px;
        }

        .highlight-card .badge-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.5;
            margin: 0;
        }

        .highlight-card .badge-icon-mini {
            position: absolute;
            top: 20px;
            right: 22px;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: rgba(108, 60, 250, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: var(--brand-purple);
        }

        /* ===== 案例瀑布 ===== */
        #cases {
            background: #0b0b16;
            position: relative;
        }

        #cases .cases-header {
            text-align: center;
            margin-bottom: 56px;
        }

        #cases .cases-stack {
            display: flex;
            flex-direction: column;
            gap: 32px;
            max-width: var(--container-max);
            margin: 0 auto;
        }

        .case-card {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            height: 400px;
            box-shadow: var(--shadow-card);
            cursor: pointer;
            transition: all var(--transition-smooth);
        }

        @media (max-width: 768px) {
            .case-card {
                height: 280px;
                border-radius: 18px;
            }
        }

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

        .case-card .case-bg {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: inherit;
        }

        .case-card .case-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 15, 26, 0.35) 0%, rgba(15, 15, 26, 0.85) 65%, rgba(15, 15, 26, 0.95) 100%);
            border-radius: inherit;
        }

        .case-card .case-content {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 36px 32px;
            z-index: 2;
            display: flex;
            flex-wrap: wrap;
            align-items: flex-end;
            justify-content: space-between;
            gap: 16px;
        }

        @media (max-width: 768px) {
            .case-card .case-content {
                padding: 24px 20px;
                flex-direction: column;
                align-items: flex-start;
            }
        }

        .case-card .case-tag {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 700;
            letter-spacing: 1px;
            color: var(--brand-cyan);
            background: rgba(0, 229, 255, 0.12);
            padding: 4px 12px;
            border-radius: 50px;
            margin-bottom: 8px;
        }

        .case-card .case-title {
            font-size: 1.6rem;
            font-weight: 800;
            color: #fff;
            margin: 0 0 6px;
            line-height: 1.2;
        }

        @media (max-width: 768px) {
            .case-card .case-title {
                font-size: 1.2rem;
            }
        }

        .case-card .case-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.5;
            margin: 0;
            max-width: 420px;
        }

        .case-card .case-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 0.85rem;
            color: var(--brand-orange);
            white-space: nowrap;
            transition: gap var(--transition-fast);
            text-decoration: none;
            padding: 10px 18px;
            border-radius: var(--radius-btn);
            border: 1.5px solid rgba(255, 107, 53, 0.4);
        }

        .case-card .case-link:hover {
            gap: 12px;
            background: rgba(255, 107, 53, 0.1);
            border-color: var(--brand-orange);
        }

        /* ===== 方案对比 ===== */
        #pricing {
            background: var(--deep-black);
            position: relative;
        }

        #pricing .pricing-header {
            text-align: center;
            margin-bottom: 56px;
        }

        #pricing .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--card-gap);
            max-width: var(--container-max);
            margin: 0 auto;
            align-items: stretch;
        }

        @media (max-width: 1024px) {
            #pricing .pricing-grid {
                grid-template-columns: 1fr;
                max-width: 500px;
            }
        }

        .pricing-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: 36px 28px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
            position: relative;
        }

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

        .pricing-card.featured {
            border: 2px solid rgba(0, 229, 255, 0.5);
            box-shadow: 0 12px 44px rgba(108, 60, 250, 0.25);
            transform: scale(1.03);
            z-index: 2;
            background: #1d1d35;
        }

        @media (max-width: 1024px) {
            .pricing-card.featured {
                transform: scale(1);
            }
        }

        .pricing-card.featured:hover {
            transform: scale(1.04);
            box-shadow: 0 20px 56px rgba(108, 60, 250, 0.35);
        }

        @media (max-width: 1024px) {
            .pricing-card.featured:hover {
                transform: scale(1);
            }
        }

        .pricing-card .pricing-badge {
            position: absolute;
            top: -14px;
            right: 24px;
            background: linear-gradient(135deg, var(--brand-purple), var(--brand-cyan));
            color: #fff;
            font-size: 0.7rem;
            font-weight: 700;
            letter-spacing: 0.6px;
            padding: 5px 14px;
            border-radius: 50px;
            white-space: nowrap;
        }

        .pricing-card .pricing-card-header {
            text-align: center;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border-subtle);
            margin-bottom: 20px;
        }

        .pricing-card .pricing-name {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin: 0 0 4px;
        }

        .pricing-card .pricing-price {
            font-size: 2.2rem;
            font-weight: 900;
            color: #fff;
            margin: 0;
            letter-spacing: -0.5px;
        }

        .pricing-card .pricing-price span {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-muted);
        }

        .pricing-card .pricing-features {
            list-style: none;
            padding: 0;
            margin: 0 0 24px;
            flex: 1;
        }

        .pricing-card .pricing-features li {
            padding: 8px 0;
            font-size: 0.9rem;
            color: var(--text-muted);
            display: flex;
            align-items: flex-start;
            gap: 10px;
            line-height: 1.4;
        }

        .pricing-card .pricing-features li::before {
            content: '✓';
            color: var(--brand-cyan);
            font-weight: 700;
            flex-shrink: 0;
            font-size: 0.85rem;
            margin-top: 1px;
        }

        .pricing-card .btn-primary {
            width: 100%;
            margin-top: auto;
        }

        /* 移动端方案对比折叠 */
        @media (max-width: 1024px) {
            .pricing-card .pricing-features {
                max-height: 0;
                overflow: hidden;
                transition: max-height var(--transition-bounce);
            }
            .pricing-card.expanded .pricing-features {
                max-height: 600px;
            }
            .pricing-card .pricing-toggle-mobile {
                display: flex;
                align-items: center;
                justify-content: center;
                gap: 6px;
                font-size: 0.85rem;
                font-weight: 600;
                color: var(--brand-cyan);
                padding: 10px 0;
                cursor: pointer;
                background: none;
                border: none;
                width: 100%;
                margin-bottom: 8px;
                letter-spacing: 0.4px;
            }
            .pricing-card .pricing-toggle-mobile .toggle-icon {
                transition: transform var(--transition-smooth);
                display: inline-block;
                font-size: 0.7rem;
            }
            .pricing-card.expanded .pricing-toggle-mobile .toggle-icon {
                transform: rotate(180deg);
            }
        }

        @media (min-width: 1025px) {
            .pricing-card .pricing-toggle-mobile {
                display: none;
            }
        }

        /* ===== FAQ ===== */
        #faq {
            background: #0b0b16;
            position: relative;
        }

        #faq .faq-header {
            text-align: center;
            margin-bottom: 56px;
        }

        #faq .faq-layout {
            display: flex;
            gap: 40px;
            max-width: var(--container-max);
            margin: 0 auto;
        }

        @media (max-width: 1024px) {
            #faq .faq-layout {
                flex-direction: column;
                gap: 24px;
            }
        }

        #faq .faq-categories {
            flex: 0 0 180px;
            display: flex;
            flex-direction: column;
            gap: 6px;
            position: sticky;
            top: 100px;
            align-self: flex-start;
        }

        @media (max-width: 1024px) {
            #faq .faq-categories {
                display: none;
            }
        }

        #faq .faq-cat-btn {
            text-align: left;
            padding: 12px 18px;
            border-radius: 14px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-muted);
            background: transparent;
            border: none;
            cursor: pointer;
            transition: all var(--transition-fast);
            letter-spacing: 0.3px;
        }

        #faq .faq-cat-btn:hover,
        #faq .faq-cat-btn.active {
            color: #fff;
            background: rgba(108, 60, 250, 0.15);
        }

        #faq .faq-cat-btn.active {
            background: rgba(108, 60, 250, 0.22);
            border-left: 3px solid var(--brand-cyan);
            border-radius: 0 14px 14px 0;
        }

        #faq .faq-content {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .faq-item {
            background: var(--card-bg);
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: rgba(108, 60, 250, 0.3);
        }

        .faq-item .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            background: none;
            border: none;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            text-align: left;
            letter-spacing: 0.3px;
            transition: color var(--transition-fast);
        }

        .faq-item .faq-question:hover {
            color: var(--brand-cyan);
        }

        .faq-item .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(108, 60, 250, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: all var(--transition-smooth);
            font-size: 1rem;
            font-weight: 700;
            color: var(--brand-cyan);
            line-height: 1;
        }

        .faq-item.open .faq-icon {
            background: rgba(108, 60, 250, 0.4);
            transform: rotate(45deg);
            color: #fff;
        }

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

        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        .faq-item .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ===== CTA 行动区 ===== */
        #contact {
            background:
                radial-gradient(ellipse at center, rgba(108, 60, 250, 0.25) 0%, transparent 65%),
                radial-gradient(ellipse at 70% 30%, rgba(0, 229, 255, 0.12) 0%, transparent 50%),
                #0b0b18;
            position: relative;
            text-align: center;
            padding-top: 100px;
            padding-bottom: 100px;
        }

        #contact::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.015'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
            pointer-events: none;
            z-index: 0;
        }

        #contact .contact-inner {
            position: relative;
            z-index: 1;
            max-width: 700px;
            margin: 0 auto;
            padding: 0 20px;
        }

        #contact h2 {
            font-size: 2.6rem;
            font-weight: 900;
            color: #fff;
            line-height: 1.2;
            margin: 0 0 16px;
            letter-spacing: 0.3px;
        }

        @media (max-width: 768px) {
            #contact h2 {
                font-size: 1.7rem;
            }
        }

        #contact .contact-subtitle {
            font-size: 1rem;
            color: var(--text-muted);
            margin: 0 0 36px;
            line-height: 1.6;
        }

        #contact .contact-form {
            display: flex;
            gap: 12px;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
        }

        @media (max-width: 640px) {
            #contact .contact-form {
                flex-direction: column;
                width: 100%;
            }
        }

        #contact .contact-input {
            flex: 1;
            min-width: 260px;
            padding: 16px 20px;
            border-radius: var(--radius-input);
            background: rgba(26, 26, 45, 0.9);
            border: 2px solid rgba(108, 60, 250, 0.3);
            color: #fff;
            font-size: 0.95rem;
            letter-spacing: 0.3px;
            transition: all var(--transition-smooth);
        }

        @media (max-width: 640px) {
            #contact .contact-input {
                width: 100%;
                min-width: auto;
            }
        }

        #contact .contact-input::placeholder {
            color: #6b6b85;
        }

        #contact .contact-input:focus {
            border-color: var(--brand-cyan);
            box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.2);
            background: rgba(26, 26, 45, 1);
        }

        #contact .btn-submit {
            padding: 16px 36px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 0.95rem;
            letter-spacing: 0.4px;
            background: linear-gradient(135deg, var(--brand-orange), #ff8c5a);
            color: #fff;
            white-space: nowrap;
            border: none;
            cursor: pointer;
            transition: all var(--transition-smooth);
            box-shadow: 0 6px 26px rgba(255, 107, 53, 0.3);
        }

        #contact .btn-submit:hover {
            transform: scale(1.04);
            box-shadow: 0 12px 38px rgba(255, 107, 53, 0.5);
        }

        #contact .form-feedback {
            margin-top: 16px;
            font-size: 0.9rem;
            color: var(--brand-cyan);
            font-weight: 600;
            min-height: 24px;
            transition: opacity var(--transition-fast);
        }

        /* ===== 页脚 ===== */
        #site-footer {
            background: #070711;
            border-top: 2px solid rgba(108, 60, 250, 0.25);
            padding-top: 60px;
            padding-bottom: 24px;
            position: relative;
        }

        #site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 40px;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }

        @media (max-width: 768px) {
            #site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                text-align: center;
            }
        }

        @media (min-width: 1024px) {
            #site-footer .footer-grid {
                padding: 0 40px;
            }
        }

        #site-footer .footer-brand-name {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.5px;
            margin: 0 0 10px;
        }

        #site-footer .footer-brand-tagline {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
            max-width: 280px;
        }

        @media (max-width: 768px) {
            #site-footer .footer-brand-tagline {
                max-width: 100%;
                margin: 0 auto;
            }
        }

        #site-footer .footer-col-title {
            font-size: 0.85rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.6px;
            margin: 0 0 16px;
            text-transform: uppercase;
        }

        #site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        #site-footer .footer-links a {
            font-size: 0.9rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

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

        #site-footer .social-icons-placeholder {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-top: 4px;
        }

        @media (max-width: 768px) {
            #site-footer .social-icons-placeholder {
                justify-content: center;
            }
        }

        #site-footer .social-circle {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(108, 60, 250, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            color: var(--text-muted);
            transition: all var(--transition-fast);
            border: 1px solid transparent;
            text-decoration: none;
        }

        #site-footer .social-circle:hover {
            background: rgba(108, 60, 250, 0.4);
            color: #fff;
            border-color: var(--brand-cyan);
            box-shadow: 0 4px 16px rgba(108, 60, 250, 0.3);
        }

        #site-footer .footer-bottom {
            max-width: var(--container-max);
            margin: 48px auto 0;
            padding: 18px 20px 0;
            border-top: 1px solid rgba(108, 60, 250, 0.12);
            text-align: center;
            font-size: 0.8rem;
            color: #5a5a72;
            letter-spacing: 0.3px;
        }

        @media (min-width: 1024px) {
            #site-footer .footer-bottom {
                padding: 18px 40px 0;
            }
        }

        /* 滚动显示动画 */
        .reveal-on-scroll {
            opacity: 0;
            transform: translateY(32px);
            transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1);
        }
        .reveal-on-scroll.revealed {
            opacity: 1;
            transform: translateY(0);
        }

        /* 背景交错视觉节奏 */
        .bg-alt-deep {
            background: #0b0b16;
        }
        .bg-main-deep {
            background: var(--deep-black);
        }

        /* 数据徽章数字滚动初始 */
        .badge-number.counting {
            transition: none;
        }