/* ============ CSS 变量 & 重置 ============ */
        :root {
            --brand-gradient: linear-gradient(135deg, #00E5B0 0%, #00C9FF 35%, #7B68EE 70%, #FF6EC7 100%);
            --brand-gradient-soft: linear-gradient(135deg, #E6FEF8 0%, #E8F7FF 35%, #F0EEFF 70%, #FFEFF8 100%);
            --brand-teal: #00C9A7;
            --brand-blue: #00A8FF;
            --brand-purple: #7B68EE;
            --brand-pink: #FF6EC7;
            --brand-orange: #FFB347;
            --brand-yellow: #FFD93D;
            --surface: #FFFFFF;
            --surface-alt: #F8FAFF;
            --surface-glass: rgba(255, 255, 255, 0.78);
            --surface-glass-strong: rgba(255, 255, 255, 0.92);
            --text-primary: #1A1A2E;
            --text-secondary: #4A4A6A;
            --text-muted: #7A7A9A;
            --text-on-gradient: #FFFFFF;
            --border-color: #E8ECF8;
            --border-gradient: linear-gradient(135deg, #E0F7F0, #DFEFFF, #EFEAFF, #FFE9F4);
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.09);
            --shadow-lg: 0 16px 56px rgba(0, 0, 0, 0.12);
            --shadow-glow: 0 8px 40px rgba(0, 201, 167, 0.22);
            --shadow-glow-blue: 0 8px 40px rgba(0, 168, 255, 0.22);
            --shadow-glow-purple: 0 8px 40px rgba(123, 104, 238, 0.22);
            --shadow-glow-pink: 0 8px 40px rgba(255, 110, 199, 0.22);
            --radius-sm: 10px;
            --radius-md: 18px;
            --radius-lg: 28px;
            --radius-xl: 40px;
            --radius-full: 9999px;
            --font-sans: 'Inter', 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
        }

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

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

        body {
            font-family: var(--font-sans);
            color: var(--text-primary);
            background: #FDFEFE;
            line-height: 1.7;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        ul {
            list-style: none;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ============ 渐变文字 ============ */
        .grad-text {
            background: var(--brand-gradient);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            -webkit-text-fill-color: transparent;
        }

        /* ============ 按钮 ============ */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 30px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 15px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            letter-spacing: 0.01em;
        }
        .btn-primary {
            background: var(--brand-gradient);
            color: var(--text-on-gradient);
            box-shadow: var(--shadow-glow);
            position: relative;
            overflow: hidden;
        }
        .btn-primary::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.25) 0%, rgba(255, 255, 255, 0) 50%);
            opacity: 0;
            transition: var(--transition);
            border-radius: var(--radius-full);
        }
        .btn-primary:hover::before {
            opacity: 1;
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 14px 48px rgba(0, 201, 167, 0.35);
        }
        .btn-outline {
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.5);
            color: var(--text-on-gradient);
            backdrop-filter: blur(8px);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-3px);
            border-color: #fff;
        }
        .btn-ghost {
            background: rgba(255, 255, 255, 0.15);
            border: 1.5px solid rgba(255, 255, 255, 0.35);
            color: var(--text-on-gradient);
            backdrop-filter: blur(10px);
        }
        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.28);
            transform: translateY(-3px);
        }

        /* ============ Header ============ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 14px 0;
            transition: var(--transition);
            background: rgba(255, 255, 255, 0.72);
            backdrop-filter: blur(20px) saturate(1.8);
            -webkit-backdrop-filter: blur(20px) saturate(1.8);
            border-bottom: 1px solid rgba(232, 236, 248, 0.7);
        }
        .site-header.scrolled {
            padding: 10px 0;
            background: rgba(255, 255, 255, 0.92);
            box-shadow: var(--shadow-sm);
        }
        .header-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 22px;
            letter-spacing: -0.02em;
        }
        .logo img {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            box-shadow: 0 4px 16px rgba(0, 201, 167, 0.25);
            transition: var(--transition);
        }
        .logo:hover img {
            transform: scale(1.05) rotate(-3deg);
        }
        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }
        .logo-text .brand-name {
            font-size: 20px;
            font-weight: 800;
            background: var(--brand-gradient);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            -webkit-text-fill-color: transparent;
        }
        .logo-text .brand-sub {
            font-size: 10px;
            font-weight: 500;
            color: var(--text-muted);
            letter-spacing: 0.06em;
        }
        .site-nav ul {
            display: flex;
            gap: 6px;
            align-items: center;
        }
        .site-nav a {
            padding: 10px 18px;
            border-radius: var(--radius-full);
            font-weight: 500;
            font-size: 14.5px;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }
        .site-nav a:hover {
            color: var(--text-primary);
            background: rgba(0, 201, 167, 0.08);
        }
        .site-nav a.active {
            color: var(--brand-teal);
            background: rgba(0, 201, 167, 0.12);
            font-weight: 600;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-full);
            font-weight: 700;
            font-size: 14.5px;
            background: var(--brand-gradient);
            color: #fff;
            box-shadow: var(--shadow-glow);
            transition: var(--transition);
            border: none;
        }
        .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 14px 48px rgba(0, 201, 167, 0.4);
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 26px;
            color: var(--text-primary);
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .mobile-toggle:hover {
            background: rgba(0, 201, 167, 0.1);
        }
        .mobile-menu-panel {
            display: none;
            background: var(--surface-glass-strong);
            backdrop-filter: blur(20px);
            border-radius: var(--radius-md);
            padding: 20px;
            margin-top: 16px;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-color);
        }
        .mobile-menu-panel.active {
            display: block;
            animation: fadeSlideDown 0.3s ease;
        }
        .mobile-menu-panel ul {
            display: flex;
            flex-direction: column;
            gap: 4px;
            margin-bottom: 16px;
        }
        .mobile-menu-panel a {
            display: block;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-weight: 500;
        }
        .mobile-menu-panel a:hover {
            background: rgba(0, 201, 167, 0.08);
        }

        @keyframes fadeSlideDown {
            from {
                opacity: 0;
                transform: translateY(-12px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ============ Hero ============ */
        .hero {
            padding: 160px 0 80px;
            position: relative;
            background:
                radial-gradient(ellipse 80% 60% at 20% 20%, rgba(0, 229, 176, 0.13) 0%, transparent 60%),
                radial-gradient(ellipse 70% 50% at 80% 30%, rgba(123, 104, 238, 0.12) 0%, transparent 60%),
                radial-gradient(ellipse 60% 50% at 50% 80%, rgba(255, 110, 199, 0.08) 0%, transparent 60%),
                linear-gradient(180deg, #FDFEFE 0%, #F8FAFF 100%);
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 600px;
            height: 600px;
            background: var(--brand-gradient);
            opacity: 0.05;
            border-radius: 50%;
            filter: blur(80px);
            animation: float 20s ease-in-out infinite;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -10%;
            width: 500px;
            height: 500px;
            background: var(--brand-gradient);
            opacity: 0.05;
            border-radius: 50%;
            filter: blur(80px);
            animation: float 25s ease-in-out infinite reverse;
        }
        @keyframes float {
            0%,
            100% {
                transform: translate(0, 0) scale(1);
            }
            33% {
                transform: translate(30px, -30px) scale(1.05);
            }
            66% {
                transform: translate(-20px, 20px) scale(0.95);
            }
        }
        .hero .container {
            position: relative;
            z-index: 1;
        }
        .hero-content {
            max-width: 640px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            padding: 8px 20px;
            border-radius: var(--radius-full);
            background: var(--surface-glass);
            border: 1px solid rgba(0, 201, 167, 0.25);
            font-size: 13px;
            font-weight: 600;
            color: var(--brand-teal);
            margin-bottom: 24px;
            box-shadow: 0 2px 16px rgba(0, 201, 167, 0.1);
            backdrop-filter: blur(10px);
            animation: pulseGlow 3s ease-in-out infinite;
        }
        @keyframes pulseGlow {
            0%,
            100% {
                box-shadow: 0 2px 16px rgba(0, 201, 167, 0.1);
            }
            50% {
                box-shadow: 0 2px 28px rgba(0, 201, 167, 0.22);
            }
        }
        .hero h1 {
            font-size: 52px;
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
        }
        .hero p {
            font-size: 18px;
            color: var(--text-secondary);
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .hero p strong {
            color: var(--text-primary);
            font-weight: 700;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 40px;
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 28px;
        }
        .hero-stat-item {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .hero-stat-item i {
            font-size: 20px;
            margin-bottom: 4px;
            background: var(--brand-gradient);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            -webkit-text-fill-color: transparent;
        }
        .hero-stat-item strong {
            font-size: 26px;
            font-weight: 800;
            letter-spacing: -0.02em;
        }
        .hero-stat-item span {
            font-size: 12px;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* ============ Trust Bar ============ */
        .trust-bar {
            padding: 32px 0;
            background: var(--surface);
            border-bottom: 1px solid var(--border-color);
        }
        .trust-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .trust-card {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 18px 20px;
            border-radius: var(--radius-md);
            background: var(--surface-alt);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .trust-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(0, 201, 167, 0.3);
        }
        .trust-card .trust-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            flex-shrink: 0;
        }
        .trust-card .trust-icon--teal {
            background: rgba(0, 201, 167, 0.12);
            color: var(--brand-teal);
        }
        .trust-card .trust-icon--blue {
            background: rgba(0, 168, 255, 0.12);
            color: var(--brand-blue);
        }
        .trust-card .trust-icon--purple {
            background: rgba(123, 104, 238, 0.12);
            color: var(--brand-purple);
        }
        .trust-card .trust-icon--pink {
            background: rgba(255, 110, 199, 0.12);
            color: var(--brand-pink);
        }
        .trust-card h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 2px;
        }
        .trust-card p {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ============ Section 通用 ============ */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--surface-alt);
        }
        .section-title {
            text-align: center;
            max-width: 620px;
            margin: 0 auto 48px;
        }
        .section-title h2 {
            font-size: 38px;
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.2;
            margin-bottom: 12px;
        }
        .section-title p {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ============ About ============ */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }
        .about-visual {
            position: relative;
        }
        .about-visual img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            position: relative;
            z-index: 1;
        }
        .about-visual::before {
            content: '';
            position: absolute;
            inset: -16px;
            background: var(--brand-gradient-soft);
            border-radius: var(--radius-xl);
            z-index: 0;
            transform: rotate(-2deg);
        }
        .about-visual::after {
            content: '';
            position: absolute;
            top: -24px;
            right: -24px;
            width: 120px;
            height: 120px;
            background: var(--brand-gradient);
            border-radius: 50%;
            opacity: 0.12;
            filter: blur(30px);
            z-index: 0;
        }
        .about-content h2 {
            font-size: 34px;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }
        .about-content p {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 14px;
            line-height: 1.8;
        }
        .about-content .btn {
            margin-top: 16px;
        }

        /* ============ Features ============ */
        .features-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .feature-list {
            display: grid;
            gap: 16px;
        }
        .feature-card {
            display: flex;
            gap: 16px;
            padding: 20px 22px;
            border-radius: var(--radius-md);
            background: var(--surface);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            cursor: default;
        }
        .feature-card:hover {
            transform: translateX(6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(0, 201, 167, 0.3);
        }
        .feature-card .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            flex-shrink: 0;
            background: var(--brand-gradient-soft);
        }
        .feature-card .feature-icon i {
            background: var(--brand-gradient);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            -webkit-text-fill-color: transparent;
        }
        .feature-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .feature-card p strong {
            color: var(--text-primary);
            font-weight: 600;
        }
        .features-visual img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
        }

        /* ============ Testimonials ============ */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .testimonial-card {
            padding: 28px;
            border-radius: var(--radius-md);
            background: var(--surface);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .testimonial-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: var(--brand-gradient);
            opacity: 0;
            transition: var(--transition);
        }
        .testimonial-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(0, 201, 167, 0.25);
        }
        .testimonial-card:hover::before {
            opacity: 1;
        }
        .testimonial-stars {
            color: var(--brand-orange);
            font-size: 14px;
            letter-spacing: 2px;
            margin-bottom: 16px;
        }
        .testimonial-card blockquote {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 20px;
            font-style: italic;
            quotes: "「" "」";
        }
        .testimonial-card blockquote::before {
            content: "「";
            font-style: normal;
            font-weight: 700;
            color: var(--brand-teal);
        }
        .testimonial-card blockquote::after {
            content: "」";
            font-style: normal;
            font-weight: 700;
            color: var(--brand-teal);
        }
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .testimonial-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--brand-gradient);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            flex-shrink: 0;
        }
        .testimonial-author h4 {
            font-size: 15px;
            font-weight: 700;
        }
        .testimonial-author p {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* ============ Pricing ============ */
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            align-items: stretch;
        }
        .pricing-card {
            padding: 32px 28px;
            border-radius: var(--radius-lg);
            background: var(--surface);
            border: 2px solid var(--border-color);
            transition: var(--transition);
            position: relative;
            text-align: center;
            display: flex;
            flex-direction: column;
        }
        .pricing-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
        }
        .pricing-card.featured {
            border-color: transparent;
            background: var(--surface);
            box-shadow: var(--shadow-lg);
            position: relative;
            background-clip: padding-box;
        }
        .pricing-card.featured::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: var(--radius-lg);
            background: var(--brand-gradient);
            z-index: -1;
        }
        .pricing-badge {
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            padding: 6px 18px;
            border-radius: var(--radius-full);
            background: var(--brand-gradient);
            color: #fff;
            font-size: 13px;
            font-weight: 700;
            box-shadow: var(--shadow-glow);
            white-space: nowrap;
        }
        .pricing-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin: 0 auto 16px;
            background: var(--brand-gradient-soft);
        }
        .pricing-icon i {
            background: var(--brand-gradient);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            -webkit-text-fill-color: transparent;
        }
        .pricing-card h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .pricing-number {
            font-size: 38px;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 6px;
        }
        .pricing-number small {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted);
        }
        .pricing-card ul {
            text-align: left;
            margin: 20px 0 24px;
            display: grid;
            gap: 10px;
            flex-grow: 1;
        }
        .pricing-card ul li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14.5px;
            color: var(--text-secondary);
        }
        .pricing-card ul li i {
            color: var(--brand-teal);
            font-size: 16px;
        }
        .btn-price {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius-full);
            font-weight: 700;
            font-size: 15px;
            border: 2px solid rgba(0, 201, 167, 0.4);
            color: var(--brand-teal);
            background: transparent;
            transition: var(--transition);
        }
        .btn-price:hover {
            background: var(--brand-gradient);
            color: #fff;
            border-color: transparent;
            box-shadow: var(--shadow-glow);
            transform: translateY(-3px);
        }
        .pricing-card.featured .btn-price {
            background: var(--brand-gradient);
            color: #fff;
            border-color: transparent;
            box-shadow: var(--shadow-glow);
        }
        .pricing-card.featured .btn-price:hover {
            transform: translateY(-3px);
            box-shadow: 0 14px 48px rgba(0, 201, 167, 0.4);
        }

        /* ============ FAQ ============ */
        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .faq-item {
            border-radius: var(--radius-md);
            background: var(--surface);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(0, 201, 167, 0.3);
            box-shadow: var(--shadow-sm);
        }
        .faq-q {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            font-weight: 600;
            font-size: 15.5px;
            cursor: pointer;
            user-select: none;
            gap: 12px;
        }
        .faq-q i {
            font-size: 14px;
            color: var(--text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-q i {
            transform: rotate(180deg);
            color: var(--brand-teal);
        }
        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
            padding: 0 22px;
        }
        .faq-item.open .faq-a {
            max-height: 400px;
            padding: 0 22px 20px;
        }
        .faq-a .faq-step {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            padding: 6px 0;
            display: flex;
            gap: 8px;
        }
        .faq-a .faq-step strong {
            color: var(--brand-teal);
            flex-shrink: 0;
            font-weight: 600;
        }

        /* ============ CTA ============ */
        .download-cta {
            padding: 80px 0;
            background:
                radial-gradient(ellipse 60% 80% at 20% 50%, rgba(0, 229, 176, 0.18) 0%, transparent 60%),
                radial-gradient(ellipse 60% 80% at 80% 50%, rgba(123, 104, 238, 0.18) 0%, transparent 60%),
                radial-gradient(ellipse 50% 60% at 50% 90%, rgba(255, 110, 199, 0.1) 0%, transparent 60%),
                var(--brand-gradient);
            position: relative;
            overflow: hidden;
        }
        .download-cta::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 50%;
            filter: blur(60px);
            animation: float 18s ease-in-out infinite;
        }
        .cta-content {
            text-align: center;
            color: #fff;
            position: relative;
            z-index: 1;
        }
        .cta-content h2 {
            font-size: 36px;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }
        .cta-content>p {
            font-size: 17px;
            opacity: 0.9;
            margin-bottom: 32px;
        }
        .cta-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
            margin-bottom: 24px;
        }
        .btn-cta-download {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 32px;
            border-radius: var(--radius-full);
            font-weight: 700;
            font-size: 16px;
            transition: var(--transition);
        }
        .btn-cta-download:hover {
            transform: translateY(-3px) scale(1.02);
        }
        .btn-appstore {
            background: #fff;
            color: var(--text-primary);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.18);
        }
        .btn-appstore:hover {
            box-shadow: 0 14px 48px rgba(0, 0, 0, 0.25);
        }
        .btn-googleplay {
            background: rgba(255, 255, 255, 0.18);
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.4);
            backdrop-filter: blur(10px);
        }
        .btn-googleplay:hover {
            background: rgba(255, 255, 255, 0.28);
        }
        .cta-desktop {
            font-size: 14px;
            opacity: 0.85;
        }
        .cta-desktop a {
            color: #fff;
            font-weight: 600;
            text-decoration: underline;
            text-underline-offset: 3px;
            transition: var(--transition);
        }
        .cta-desktop a:hover {
            opacity: 0.75;
        }

        /* ============ Blog ============ */
        .blog-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .blog-card {
            border-radius: var(--radius-md);
            background: var(--surface);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .blog-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(0, 201, 167, 0.3);
        }
        .blog-thumb {
            height: 160px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 48px;
            background: var(--brand-gradient-soft);
        }
        .blog-thumb i {
            background: var(--brand-gradient);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            -webkit-text-fill-color: transparent;
        }
        .blog-body {
            padding: 20px 22px;
        }
        .blog-body h3 {
            font-size: 16.5px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 10px;
        }
        .blog-body h3 a:hover {
            color: var(--brand-teal);
        }
        .blog-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .blog-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
        }
        .blog-date {
            font-size: 12.5px;
            color: var(--text-muted);
        }
        .blog-footer .btn {
            padding: 8px 18px;
            font-size: 13px;
            font-weight: 600;
        }

        /* ============ Footer ============ */
        .footer {
            background: #1A1A2E;
            color: rgba(255, 255, 255, 0.75);
            padding: 60px 0 20px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-widget h5 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-widget p {
            font-size: 14px;
            line-height: 1.7;
            margin-top: 12px;
            opacity: 0.7;
        }
        .footer-links {
            display: grid;
            gap: 8px;
        }
        .footer-links a {
            font-size: 14px;
            opacity: 0.7;
            transition: var(--transition);
        }
        .footer-links a:hover {
            opacity: 1;
            color: var(--brand-teal);
            padding-left: 6px;
        }
        .footer-copy {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 13px;
            opacity: 0.6;
        }
        .footer-copy a {
            color: var(--brand-teal);
            font-weight: 600;
        }

        /* ============ Scroll Top ============ */
        .scroll-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--brand-gradient);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            box-shadow: var(--shadow-glow);
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 999;
            cursor: pointer;
            border: none;
        }
        .scroll-top.active {
            opacity: 1;
            visibility: visible;
        }
        .scroll-top:hover {
            transform: translateY(-4px);
            box-shadow: 0 14px 40px rgba(0, 201, 167, 0.4);
        }

        /* ============ 响应式 ============ */
        @media (max-width: 1024px) {
            .hero h1 {
                font-size: 40px;
            }
            .testimonials-grid,
            .pricing-grid,
            .blog-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .features-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .features-visual {
                order: -1;
            }
            .about-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 768px) {
            .site-nav {
                display: none;
            }
            .header-actions .btn-cta {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .hero {
                padding: 120px 0 56px;
            }
            .hero h1 {
                font-size: 32px;
            }
            .hero p {
                font-size: 16px;
            }
            .hero-stats {
                gap: 20px;
            }
            .trust-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .section {
                padding: 56px 0;
            }
            .section-title h2 {
                font-size: 28px;
            }
            .testimonials-grid,
            .pricing-grid,
            .blog-grid {
                grid-template-columns: 1fr;
            }
            .faq-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .cta-content h2 {
                font-size: 26px;
            }
            .scroll-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 18px;
            }
        }
        @media (max-width: 480px) {
            .trust-grid {
                grid-template-columns: 1fr;
            }
            .hero-stats {
                gap: 16px;
                flex-wrap: wrap;
            }
            .hero-stat-item strong {
                font-size: 20px;
            }
            .btn {
                padding: 12px 22px;
                font-size: 14px;
            }
        }