:root {
            --orange: #FF5A1B;
            --orange-light: #ff8c5a;
            --orange-dark: #e55a2b;
            --bg-dark: #fafbfc;
            --bg-card: #ffffff;
            --bg-card-hover: #f8fafc;
            --border: rgba(15, 23, 42, 0.08);
            --text: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            background: var(--bg-dark);
            color: var(--text);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* 导航 */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 16px 0;
            background: rgba(255, 255, 255, 0.75);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
        }

        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 16px;
            color: var(--text);
            text-decoration: none;
            white-space: nowrap;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .logo-icon img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .nav-links {
            display: flex;
            gap: 36px;
            list-style: none;
        }

        .nav-links a {
            color: var(--text-secondary);
            text-decoration: none;
            font-size: 15px;
            font-weight: 500;
            transition: color 0.3s;
        }

        .nav-links a:hover {
            color: var(--orange);
        }

        .nav-links a.active {
            color: var(--orange);
            font-weight: 600;
        }

        .nav-cta {
            background: #FF5A1B;
            color: white;
            padding: 8px 28px;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            font-size: 14px;
            transition: transform 0.3s;
        }

        .nav-cta:hover {
            transform: translateY(-1px);
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--text);
            cursor: pointer;
        }

        /* Hero */
        .hero {
            position: relative;
            z-index: 1;
            padding: 160px 24px 80px;
            max-width: 1200px;
            margin: 0 auto;
            text-align: center;
        }

        /* 首屏流体弥散渐变 */
        .hero-aurora {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            z-index: 0;
            overflow: hidden;
            pointer-events: none;
        }

        .aurora-blob {
            position: absolute;
            border-radius: 50%;
            filter: blur(90px);
            will-change: transform;
        }

        .blob-a {
            width: 520px;
            height: 520px;
            background: radial-gradient(circle, rgba(255, 140, 90, 0.34) 0%, transparent 65%);
            top: -140px;
            left: -120px;
            animation: aurora-a 22s ease-in-out infinite alternate;
        }

        .blob-b {
            width: 480px;
            height: 480px;
            background: radial-gradient(circle, rgba(147, 178, 255, 0.32) 0%, transparent 65%);
            top: -100px;
            right: -120px;
            animation: aurora-b 26s ease-in-out infinite alternate;
        }

        .blob-c {
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(125, 211, 252, 0.3) 0%, transparent 65%);
            top: 42%;
            left: 58%;
            animation: aurora-c 20s ease-in-out infinite alternate;
        }

        .blob-d {
            width: 460px;
            height: 460px;
            background: radial-gradient(circle, rgba(196, 156, 255, 0.26) 0%, transparent 65%);
            bottom: -180px;
            left: 18%;
            animation: aurora-d 24s ease-in-out infinite alternate;
        }

        @keyframes aurora-a {
            from {
                transform: translate(0, 0) scale(1) rotate(0deg);
            }

            to {
                transform: translate(70px, 50px) scale(1.25) rotate(18deg);
            }
        }

        @keyframes aurora-b {
            from {
                transform: translate(0, 0) scale(1) rotate(0deg);
            }

            to {
                transform: translate(-60px, 45px) scale(1.18) rotate(-16deg);
            }
        }

        @keyframes aurora-c {
            from {
                transform: translate(0, 0) scale(1);
            }

            to {
                transform: translate(-55px, -40px) scale(1.15);
            }
        }

        @keyframes aurora-d {
            from {
                transform: translate(0, 0) scale(1);
            }

            to {
                transform: translate(45px, -35px) scale(1.22);
            }
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            background: rgba(255, 107, 53, 0.08);
            border-radius: 100px;
            color: var(--orange-dark);
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 28px;
        }

        .badge-dot {
            width: 8px;
            height: 8px;
            background: var(--orange);
            border-radius: 50%;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {

            0%,
            100% {
                opacity: 1;
            }

            50% {
                opacity: 0.5;
            }
        }

        .hero h1 {
            font-size: 56px;
            font-weight: 900;
            line-height: 1.3;
            margin-bottom: 24px;
            letter-spacing: -0.02em;
        }

        .hero h1 span {
            background: linear-gradient(135deg, var(--orange) 0%, var(--orange-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0 auto 40px;
            line-height: 1.7;
        }

        .hero-tags {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }

        .hero-tag {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 10px 32px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 100px;
            font-size: 15px;
            color: var(--text);
            font-weight: 500;
        }

        .hero-tag svg {
            width: 18px;
            height: 18px;
            color: var(--orange);
        }

        .hero-cta-group {
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 16px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }

        .btn-primary {
            background-color: #FF5A1B;
            color: white;
            padding: 16px 70px;
            border-radius: 12px;
            text-decoration: none;
            font-weight: 700;
            font-size: 18px;
            transition: all 0.3s;
            border: none;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
        }

        .btn-secondary {
            background: var(--bg-card);
            color: var(--text);
            padding: 16px 36px;
            border-radius: 12px;
            text-decoration: none;
            font-weight: 600;
            font-size: 17px;
            transition: all 0.3s;
            border: 1px solid var(--border);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-secondary:hover {
            background: var(--bg-card-hover);
            border-color: rgba(15, 23, 42, 0.2);
        }

        /* 产品截图展示 */
        .hero-visual {
            position: relative;
            max-width: 1000px;
            margin: 0 auto;
        }

        .hero-visual-frame {
            position: relative;
            border-radius: 16px;
            overflow: hidden;
        }

        .hero-visual img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* 卖点区 */
        .section {
            padding: 100px 24px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .section-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .section-tag {
            display: inline-block;
            padding: 6px 14px;
            background: rgba(255, 107, 53, 0.08);
            border-radius: 100px;
            color: var(--orange-dark);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .section-title {
            font-size: 40px;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }

        .section-desc {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 40px 32px;
            transition: border-color 0.3s;
        }

        .feature-card:hover {
            border-color: rgba(255, 107, 53, 0.35);
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            background: rgba(255, 107, 53, 0.08);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
        }

        .feature-icon svg {
            width: 28px;
            height: 28px;
            color: var(--orange);
        }

        .feature-card h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .feature-card p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

        .feature-list {
            margin-top: 20px;
            list-style: none;
        }

        .feature-list li {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-secondary);
            font-size: 14px;
            margin-bottom: 10px;
        }

        .feature-list li svg {
            width: 16px;
            height: 16px;
            color: var(--orange);
            flex-shrink: 0;
        }

        /* 功能详情 */
        .detail-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
            margin-bottom: 100px;
        }

        .detail-row:last-child {
            margin-bottom: 0;
        }

        .detail-row.reverse {
            direction: rtl;
        }

        .detail-row.reverse>* {
            direction: ltr;
        }

        .detail-content h3 {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 20px;
            line-height: 1.25;
        }

        .detail-content p {
            color: var(--text-secondary);
            font-size: 17px;
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .detail-visual {
            position: relative;
        }

        .detail-visual-box {
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }

        .detail-visual-box img {
            width: 100%;
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }

        .format-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .format-tag {
            padding: 10px 18px;
            background: #f8fafc;
            border: 1px solid var(--border);
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            transition: all 0.3s;
        }

        .format-tag:hover {
            background: rgba(255, 107, 53, 0.08);
            border-color: rgba(255, 107, 53, 0.3);
        }

        .format-tag.popular {
            background: rgba(255, 107, 53, 0.1);
            border-color: rgba(255, 107, 53, 0.3);
            color: var(--orange-dark);
        }

        /* 格式支持 */
        .formats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .format-category {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 28px;
            transition: border-color 0.3s;
        }

        .format-category:hover {
            border-color: rgba(255, 107, 53, 0.3);
        }

        .format-category h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .format-category h4 svg {
            width: 20px;
            height: 20px;
            color: var(--orange);
        }

        .format-category ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .format-category li {
            padding: 6px 12px;
            background: #f8fafc;
            border-radius: 6px;
            font-size: 13px;
            color: var(--text-secondary);
        }

        /* 使用流程 */
        .steps {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 36px 28px;
            text-align: center;
            transition: border-color 0.3s;
        }

        .step-card:hover {
            border-color: rgba(255, 107, 53, 0.3);
        }

        .step-number {
            width: 48px;
            height: 48px;
            background: rgba(255, 107, 53, 0.08);
            color: var(--orange-dark);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            margin: 0 auto 20px;
        }

        .step-card h4 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .step-card p {
            color: var(--text-secondary);
            font-size: 15px;
        }

        /* CTA */
        .cta-section {
            padding: 0 24px 120px;
        }

        .cta-box {
            max-width: 1200px;
            margin: 0 auto;
            background: linear-gradient(45deg, #ff5a17 0%, #ff781c 50%, #ffad40 100%);
            border-radius: 28px;
            padding: 60px 60px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.25) 0%, transparent 65%);
            filter: blur(80px);
            pointer-events: none;
        }

        .cta-box h2 {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 16px;
            color: #ffffff;
            position: relative;
            z-index: 1;
        }

        .cta-box p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.92);
            margin-bottom: 36px;
            position: relative;
            z-index: 1;
        }

        .cta-box .btn-primary {
            background: #ffffff;
            color: var(--orange);
            position: relative;
            z-index: 1;
        }

        .cta-box .btn-primary:hover {
            background: rgba(255, 255, 255, 0.95);
            transform: translateY(-2px);
        }

        .os-badges {
            display: flex;
            justify-content: center;
            gap: 12px;
            margin-top: 24px;
            flex-wrap: wrap;
        }

        .os-badge {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 8px 16px;
            background: #f8fafc;
            border-radius: 100px;
            font-size: 13px;
            color: var(--text-secondary);
        }

        .os-badge svg {
            width: 16px;
            height: 16px;
        }

        /* Footer */
        footer {
            background: #0b1020;
            padding: 60px 24px 40px;
        }

        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .footer-top {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            margin-bottom: 40px;
            flex-wrap: wrap;
            gap: 40px;
        }

        .footer-brand {
            max-width: 320px;
        }

        .footer-brand .logo {
            margin-bottom: 16px;
            color: #f1f5f9;
        }

        .footer-brand p {
            color: rgba(241, 245, 249, 0.6);
            font-size: 14px;
            line-height: 1.7;
        }

        .footer-contact {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            margin-top: 18px;
            color: rgba(241, 245, 249, 0.6);
            font-size: 14px;
        }

        .footer-contact svg {
            width: 16px;
            height: 16px;
            flex-shrink: 0;
        }

        .footer-contact a {
            color: inherit;
            font-size: 15px;
            text-decoration: none;
        }

        .footer-links {
            display: flex;
            gap: 150px;
        }

        .footer-col h5 {
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 16px;
            color: #f1f5f9;
        }

        .footer-col ul {
            list-style: none;
        }

        .footer-col li {
            margin-bottom: 10px;
        }

        .footer-col a {
            color: rgba(241, 245, 249, 0.6);
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s;
        }

        .footer-col a:hover {
            color: var(--orange-light);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: center;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }

        .footer-bottom p {
            color: rgba(241, 245, 249, 0.4);
            font-size: 13px;
        }

        .footer-bottom p a {
            color: rgba(241, 245, 249, 0.4);
            font-size: 13px;
        }

        .footer-bottom p a:hover {
            color: #ffffff;
        }

        /* 动画 */
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.8s ease, transform 0.8s ease;
        }

        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* 响应式 */
        @media (max-width: 1024px) {

            .features-grid,
            .formats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .detail-row {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .detail-row.reverse {
                direction: ltr;
            }

            .steps {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .mobile-menu-btn {
                display: block;
            }

            .hero {
                padding-top: 120px;
            }

            .hero h1 {
                font-size: 36px;
            }

            .hero-subtitle {
                font-size: 17px;
            }

            .features-grid,
            .formats-grid {
                grid-template-columns: 1fr;
            }

            .section-title,
            .cta-box h2 {
                font-size: 30px;
            }

            .detail-content h3 {
                font-size: 26px;
            }

            .cta-box {
                padding: 50px 28px;
            }

            .footer-links {
                flex-direction: column;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .hero-aurora {
                height: 100svh;
            }

            .aurora-blob {
                filter: blur(55px);
            }
        }

        @media (prefers-reduced-motion: reduce) {
            .aurora-blob {
                animation: none;
            }
        }