/* roulang page: index */
:root {
            --primary: #00F0FF;
            --primary-glow: rgba(0, 240, 255, 0.5);
            --primary-subtle: rgba(0, 240, 255, 0.08);
            --secondary: #7B61FF;
            --bg-deep: #0B0C10;
            --bg-card: #14161C;
            --bg-elevated: #1E2028;
            --bg-footer: #090A0E;
            --text-primary: #EAECEF;
            --text-secondary: #8B8F9A;
            --text-disabled: #4B4E56;
            --border-default: #2A2D35;
            --border-glow: rgba(0, 240, 255, 0.15);
            --success: #00F0A0;
            --danger: #FF3C5A;
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-card-hover: 0 8px 32px rgba(0, 240, 255, 0.08);
            --shadow-glow: 0 0 24px rgba(0, 240, 255, 0.5);
            --font-stack: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
            --font-mono: 'SF Mono', 'Fira Code', 'Courier New', monospace;
            --section-gap: 120px;
            --section-gap-mobile: 60px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s ease;
            --transition-card: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

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

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

        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.625;
            color: var(--text-primary);
            background-color: var(--bg-deep);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            background-image:
                repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.012) 0px, rgba(255, 255, 255, 0.012) 1px, transparent 1px, transparent 60px),
                repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.012) 0px, rgba(255, 255, 255, 0.012) 1px, transparent 1px, transparent 60px);
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: #33f5ff;
            text-decoration: none;
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* ===== 导航栏 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(11, 12, 16, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(42, 45, 53, 0.5);
            transition: background var(--transition-smooth);
        }
        .site-header.scrolled {
            background: rgba(11, 12, 16, 0.95);
            border-bottom-color: var(--border-glow);
        }
        .navbar {
            padding: 0 16px;
            min-height: 64px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1200px;
            margin: 0 auto;
            width: 100%;
        }
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: var(--text-primary) !important;
            text-decoration: none;
            letter-spacing: 0.03em;
        }
        .navbar-brand .logo-icon {
            width: 36px;
            height: 36px;
            flex-shrink: 0;
        }
        .navbar-brand .logo-icon svg {
            width: 100%;
            height: 100%;
        }
        .navbar-brand:hover {
            color: var(--primary) !important;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links a {
            display: inline-block;
            padding: 8px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: color var(--transition-fast), background var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: transform var(--transition-smooth);
        }
        .nav-links a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.03);
        }
        .nav-links a:hover::after {
            transform: translateX(-50%) scaleX(1);
        }
        .nav-links a.active {
            color: var(--primary);
        }
        .nav-links a.active::after {
            transform: translateX(-50%) scaleX(1);
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            font-size: 14px;
            font-weight: 600;
            color: #0B0C10 !important;
            background: var(--primary);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            white-space: nowrap;
            border: none;
            cursor: pointer;
        }
        .nav-cta:hover {
            background: #33f5ff;
            box-shadow: var(--shadow-glow);
            transform: translateY(-1px);
        }
        .nav-cta::after {
            display: none !important;
        }

        /* 移动端 offcanvas */
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
            color: var(--text-primary);
            font-size: 24px;
            line-height: 1;
            transition: color var(--transition-fast);
        }
        .mobile-toggle:hover {
            color: var(--primary);
        }
        .offcanvas-overlay {
            display: none;
            position: fixed;
            inset: 0;
            z-index: 1060;
            background: rgba(11, 12, 16, 0.97);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 28px;
        }
        .offcanvas-overlay.is-open {
            display: flex;
        }
        .offcanvas-overlay a {
            font-size: 18px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 10px 20px;
            transition: color var(--transition-fast);
        }
        .offcanvas-overlay a:hover,
        .offcanvas-overlay a.active {
            color: var(--primary);
        }
        .offcanvas-close {
            position: absolute;
            top: 20px;
            right: 24px;
            background: none;
            border: none;
            font-size: 32px;
            color: var(--text-primary);
            cursor: pointer;
            transition: color var(--transition-fast);
        }
        .offcanvas-close:hover {
            color: var(--primary);
        }
        .offcanvas-overlay .nav-cta-mobile {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 12px 28px;
            font-size: 16px;
            font-weight: 600;
            color: #0B0C10;
            background: var(--primary);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            border: none;
            cursor: pointer;
            margin-top: 10px;
        }
        .offcanvas-overlay .nav-cta-mobile:hover {
            background: #33f5ff;
            box-shadow: var(--shadow-glow);
        }

        /* ===== Hero 区块 ===== */
        .hero-section {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 100px 20px 80px;
            overflow: hidden;
            background: var(--bg-deep);
        }
        .hero-bg-img {
            position: absolute;
            inset: 0;
            z-index: 0;
            object-fit: cover;
            width: 100%;
            height: 100%;
            opacity: 0.35;
            filter: brightness(0.5) saturate(0.7);
        }
        .hero-bg-overlay {
            position: absolute;
            inset: 0;
            z-index: 1;
            background: linear-gradient(180deg, rgba(11, 12, 16, 0.55) 0%, rgba(11, 12, 16, 0.82) 60%, rgba(11, 12, 16, 0.95) 100%);
        }
        .hero-glow {
            position: absolute;
            top: 20%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.1) 0%, transparent 70%);
            z-index: 1;
            pointer-events: none;
            animation: heroPulse 4s ease-in-out infinite;
        }
        @keyframes heroPulse {
            0%,
            100% {
                transform: translate(-50%, -50%) scale(1);
                opacity: 0.7;
            }
            50% {
                transform: translate(-50%, -50%) scale(1.2);
                opacity: 0.35;
            }
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.04em;
            color: var(--primary);
            border: 1px solid var(--border-glow);
            border-radius: 50px;
            background: rgba(0, 240, 255, 0.05);
            margin-bottom: 20px;
        }
        .hero-content h1 {
            font-size: 48px;
            line-height: 1.2;
            font-weight: 700;
            letter-spacing: 0.02em;
            margin: 0 0 20px;
            background: linear-gradient(135deg, #00F0FF 0%, #7B61FF 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: none;
            filter: drop-shadow(0 0 20px rgba(0, 240, 255, 0.3));
        }
        .hero-content .hero-subtitle {
            font-size: 17px;
            line-height: 1.7;
            color: var(--text-secondary);
            margin: 0 auto 32px;
            max-width: 600px;
        }
        .hero-buttons {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .btn-primary-glow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            font-size: 15px;
            font-weight: 600;
            color: #0B0C10;
            background: var(--primary);
            border: none;
            border-radius: var(--radius-md);
            cursor: pointer;
            transition: all var(--transition-fast);
            text-decoration: none;
        }
        .btn-primary-glow:hover {
            background: #33f5ff;
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
            color: #0B0C10;
        }
        .btn-outline-glow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.35);
            border-radius: var(--radius-md);
            cursor: pointer;
            transition: all var(--transition-fast);
            text-decoration: none;
        }
        .btn-outline-glow:hover {
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.15);
            transform: translateY(-2px);
        }
        .hero-scroll-indicator {
            position: absolute;
            bottom: 30px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 2;
            animation: bounceDown 2s ease-in-out infinite;
            color: var(--text-secondary);
            font-size: 20px;
            opacity: 0.7;
        }
        @keyframes bounceDown {
            0%,
            100% {
                transform: translateX(-50%) translateY(0);
            }
            50% {
                transform: translateX(-50%) translateY(10px);
            }
        }

        /* ===== 通用板块样式 ===== */
        .section-block {
            padding: var(--section-gap) 20px;
            position: relative;
        }
        .section-block .container {
            max-width: 1200px;
            margin: 0 auto;
        }
        .section-label {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .section-heading {
            font-size: 32px;
            line-height: 1.25;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 16px;
            position: relative;
        }
        .section-heading::after {
            content: '';
            display: block;
            width: 48px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
            margin-top: 14px;
        }
        .section-heading.text-center::after {
            margin-left: auto;
            margin-right: auto;
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 600px;
            line-height: 1.7;
        }
        .section-desc.text-center {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== 卡片通用 ===== */
        .card-dark {
            background: var(--bg-card);
            border: 1px solid transparent;
            border-radius: var(--radius-lg);
            padding: 32px;
            transition: all var(--transition-card);
            height: 100%;
            position: relative;
            overflow: hidden;
        }
        .card-dark:hover {
            transform: translateY(-4px);
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card-hover);
        }
        .card-dark .card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--primary);
            background: rgba(0, 240, 255, 0.06);
            margin-bottom: 18px;
            flex-shrink: 0;
        }
        .card-dark h3 {
            font-size: 20px;
            line-height: 1.4;
            font-weight: 500;
            color: var(--text-primary);
            margin: 0 0 10px;
        }
        .card-dark p {
            font-size: 15px;
            line-height: 1.65;
            color: var(--text-secondary);
            margin: 0;
        }

        /* ===== 功能分组（交错图文） ===== */
        .feature-row {
            display: flex;
            align-items: center;
            gap: 60px;
            margin-bottom: 80px;
        }
        .feature-row:last-child {
            margin-bottom: 0;
        }
        .feature-row.reverse {
            flex-direction: row-reverse;
        }
        .feature-text {
            flex: 1;
            min-width: 0;
        }
        .feature-text h3 {
            font-size: 22px;
            line-height: 1.35;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 14px;
        }
        .feature-text ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .feature-text ul li {
            padding: 7px 0 7px 22px;
            position: relative;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.6;
        }
        .feature-text ul li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 14px;
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 8px rgba(0, 240, 255, 0.5);
        }
        .feature-image {
            flex: 1;
            min-width: 0;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            aspect-ratio: 16/10;
            background: var(--bg-elevated);
        }
        .feature-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ===== 场景横向滑动 ===== */
        .scenario-scroll {
            display: flex;
            gap: 20px;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
            padding-bottom: 10px;
            scrollbar-width: thin;
            scrollbar-color: var(--border-default) transparent;
        }
        .scenario-scroll::-webkit-scrollbar {
            height: 4px;
        }
        .scenario-scroll::-webkit-scrollbar-track {
            background: transparent;
        }
        .scenario-scroll::-webkit-scrollbar-thumb {
            background: var(--border-default);
            border-radius: 4px;
        }
        .scenario-card {
            flex: 0 0 320px;
            scroll-snap-align: start;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            border: 1px solid transparent;
            transition: all var(--transition-card);
            position: relative;
        }
        .scenario-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .scenario-number {
            font-family: var(--font-mono);
            font-size: 64px;
            font-weight: 700;
            color: rgba(0, 240, 255, 0.08);
            position: absolute;
            top: 10px;
            right: 20px;
            line-height: 1;
            pointer-events: none;
        }
        .scenario-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 10px;
        }
        .scenario-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }
        .scenario-card .scenario-img {
            width: 100%;
            aspect-ratio: 16/9;
            border-radius: var(--radius-md);
            object-fit: cover;
            margin-bottom: 16px;
            background: var(--bg-elevated);
        }

        /* ===== 数据统计区 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 36px 24px;
            text-align: center;
            border: 1px solid transparent;
            transition: all var(--transition-card);
        }
        .stat-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .stat-number {
            font-family: var(--font-mono);
            font-size: 42px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.02em;
            margin-bottom: 6px;
            line-height: 1;
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* ===== 价格卡片 ===== */
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            align-items: stretch;
        }
        .pricing-card {
            background: var(--bg-card);
            border: 1px solid transparent;
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            text-align: center;
            transition: all var(--transition-card);
            position: relative;
            display: flex;
            flex-direction: column;
        }
        .pricing-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card-hover);
        }
        .pricing-card.featured {
            border-color: var(--border-glow);
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.1);
            background: var(--bg-elevated);
        }
        .pricing-badge {
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--primary);
            color: #0B0C10;
            font-size: 12px;
            font-weight: 700;
            padding: 5px 16px;
            border-radius: 50px;
            letter-spacing: 0.04em;
        }
        .pricing-name {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 8px;
        }
        .pricing-price {
            font-family: var(--font-mono);
            font-size: 40px;
            font-weight: 700;
            color: var(--primary);
            margin: 0 0 4px;
        }
        .pricing-price span {
            font-size: 16px;
            font-weight: 400;
            color: var(--text-secondary);
        }
        .pricing-desc {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0 0 20px;
        }
        .pricing-features {
            list-style: none;
            padding: 0;
            margin: 0 0 24px;
            text-align: left;
            flex-grow: 1;
        }
        .pricing-features li {
            padding: 7px 0 7px 20px;
            position: relative;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.5;
        }
        .pricing-features li::before {
            content: '✓';
            position: absolute;
            left: 0;
            top: 7px;
            color: var(--success);
            font-size: 12px;
            font-weight: 700;
        }
        .pricing-card .btn-primary-glow {
            width: 100%;
            justify-content: center;
        }

        /* ===== FAQ 手风琴 ===== */
        .faq-accordion {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-default);
            padding: 0;
        }
        .faq-question {
            width: 100%;
            background: none;
            border: none;
            text-align: left;
            padding: 18px 0;
            font-size: 17px;
            font-weight: 500;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            transition: color var(--transition-fast);
            font-family: var(--font-stack);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--border-default);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 700;
            color: var(--text-secondary);
            transition: all var(--transition-smooth);
        }
        .faq-item.open .faq-icon {
            border-color: var(--primary);
            color: var(--primary);
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            padding: 0;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 0 18px;
        }

        /* ===== 最终CTA ===== */
        .cta-full {
            position: relative;
            text-align: center;
            padding: 100px 20px;
            background: var(--bg-deep);
            overflow: hidden;
        }
        .cta-full .cta-glow-bg {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.12) 0%, rgba(123, 97, 255, 0.06) 50%, transparent 70%);
            pointer-events: none;
        }
        .cta-full .container {
            position: relative;
            z-index: 1;
            max-width: 700px;
            margin: 0 auto;
        }
        .cta-full h2 {
            font-size: 34px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 16px;
            line-height: 1.3;
        }
        .cta-full p {
            font-size: 16px;
            color: var(--text-secondary);
            margin: 0 0 28px;
        }
        .cta-full .btn-primary-glow {
            font-size: 17px;
            padding: 16px 40px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-footer);
            padding: 60px 20px 30px;
            color: var(--text-secondary);
        }
        .site-footer .container {
            max-width: 1200px;
            margin: 0 auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand-desc {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-disabled);
            margin-top: 12px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 16px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-disabled);
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--primary);
        }
        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 12px;
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid var(--border-default);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-disabled);
            font-size: 16px;
            transition: all var(--transition-fast);
        }
        .footer-social a:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(0, 240, 255, 0.05);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-default);
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: var(--text-disabled);
        }

        /* ===== 滚动动画 ===== */
        .reveal {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease-out, transform 0.6s ease-out;
        }
        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991px) {
            .nav-links {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .section-heading {
                font-size: 26px;
                line-height: 1.3;
            }
            .section-heading::after {
                width: 36px;
                height: 2px;
                margin-top: 10px;
            }
            .hero-content h1 {
                font-size: 34px;
                line-height: 1.2;
            }
            .hero-content .hero-subtitle {
                font-size: 15px;
            }
            .feature-row,
            .feature-row.reverse {
                flex-direction: column;
                gap: 30px;
            }
            .feature-image {
                aspect-ratio: 16/9;
                width: 100%;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .pricing-grid {
                grid-template-columns: 1fr;
                gap: 20px;
                max-width: 420px;
                margin: 0 auto;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .section-block {
                padding: var(--section-gap-mobile) 20px;
            }
            .cta-full h2 {
                font-size: 26px;
            }
        }
        @media (max-width: 575px) {
            .navbar {
                padding: 0 12px;
                min-height: 56px;
            }
            .navbar-brand {
                font-size: 17px;
            }
            .navbar-brand .logo-icon {
                width: 30px;
                height: 30px;
            }
            .hero-content h1 {
                font-size: 28px;
                line-height: 1.3;
            }
            .hero-content .hero-subtitle {
                font-size: 14px;
            }
            .btn-primary-glow,
            .btn-outline-glow {
                padding: 12px 22px;
                font-size: 14px;
            }
            .section-heading {
                font-size: 22px;
                line-height: 1.35;
            }
            .card-dark {
                padding: 22px 18px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-number {
                font-size: 30px;
            }
            .scenario-card {
                flex: 0 0 260px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .cta-full {
                padding: 60px 16px;
            }
            .cta-full h2 {
                font-size: 22px;
            }
            .section-block {
                padding: 50px 16px;
            }
            .hero-section {
                min-height: auto;
                padding: 90px 16px 60px;
            }
            .pricing-card {
                padding: 24px 18px;
            }
            .pricing-price {
                font-size: 32px;
            }
            .hero-buttons {
                flex-direction: column;
                align-items: center;
            }
            .hero-buttons .btn-primary-glow,
            .hero-buttons .btn-outline-glow {
                width: 100%;
                max-width: 280px;
                justify-content: center;
            }
        }
        @media (min-width: 992px) {
            .offcanvas-overlay {
                display: none !important;
            }
        }