* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Inter', 'Noto Sans SC', sans-serif;
            background: #ffffff;
            color: #1A202C;
            line-height: 1.5;
            scroll-behavior: smooth;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        /* header 样式 */
        header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }
        .header-content {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
        }
        .logo-icon {
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, #2563EB 0%, #1E40AF 100%);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 6px 12px -6px rgba(37,99,235,0.25);
        }
        .logo-icon svg {
            width: 22px;
            height: 22px;
            fill: white;
        }
        .logo-text {
            font-size: 1.55rem;
            font-weight: 700;
            background: linear-gradient(120deg, #0F172A 30%, #2563EB 90%);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            letter-spacing: -0.3px;
        }
        nav ul {
            display: flex;
            gap: 2rem;
            list-style: none;
        }
        nav a {
            text-decoration: none;
            font-weight: 500;
            color: #334155;
            transition: 0.2s;
            font-size: 0.95rem;
        }
        nav a:hover {
            color: #2563EB;
        }
        .header-actions {
            display: flex;
            gap: 12px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 8px 20px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all 0.2s ease;
            text-decoration: none;
            cursor: pointer;
            border: 1px solid transparent;
        }
        .btn-outline {
            border-color: #CBD5E1;
            background: transparent;
            color: #1E293B;
        }
        .btn-outline:hover {
            border-color: #2563EB;
            color: #2563EB;
            background: #EFF6FF;
        }
        .btn-primary {
            background: #2563EB;
            color: white;
            box-shadow: 0 4px 8px -2px rgba(37,99,235,0.3);
        }
        .btn-primary:hover {
            background: #1D4ED8;
            transform: translateY(-1px);
        }
        /* hero 原有样式 */
        .hero {
            padding: 80px 0 100px;
            background: radial-gradient(ellipse 80% 50% at 20% 40%, rgba(37,99,235,0.03), transparent);
            position: relative;
            overflow: hidden;
        }
        .hero-grid {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }
        .hero-content {
            flex: 1.2;
            min-width: 280px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(37,99,235,0.1);
            backdrop-filter: blur(2px);
            padding: 6px 16px;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 500;
            color: #1E40AF;
            margin-bottom: 24px;
            border: 1px solid rgba(37,99,235,0.2);
        }
        .hero-title {
            font-size: 3.4rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, #0F172A 0%, #1E3A8A 100%);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            margin-bottom: 20px;
        }
        .hero-title span {
            background: linear-gradient(135deg, #2563EB, #7C3AED);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
        }
        .hero-desc {
            font-size: 1.12rem;
            color: #334155;
            max-width: 550px;
            margin-bottom: 32px;
        }
        .hero-stats {
            display: flex;
            gap: 32px;
            margin-bottom: 36px;
        }
        .stat-item h3 {
            font-size: 1.8rem;
            font-weight: 800;
            color: #0F172A;
        }
        .stat-item p {
            font-size: 0.85rem;
            color: #475569;
        }
        .hero-cta {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-visual {
            flex: 1;
            background: rgba(255,255,255,0.5);
            border-radius: 48px;
            backdrop-filter: blur(4px);
            box-shadow: 0 25px 45px -12px rgba(0,0,0,0.15);
            border: 1px solid rgba(255,255,255,0.6);
            padding: 20px;
        }
        .fingerprint-card {
            background: white;
            border-radius: 32px;
            padding: 24px;
            box-shadow: 0 20px 35px -12px rgba(0,0,0,0.1);
        }
        .fingerprint-visual {
            display: flex;
            justify-content: center;
            margin-bottom: 16px;
        }
        .fingerprint-svg {
            width: 180px;
            height: 180px;
            filter: drop-shadow(0 8px 12px rgba(37,99,235,0.2));
        }
        .tech-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin: 20px 0 10px;
        }
        .tech-tag {
            background: #F1F5F9;
            padding: 6px 14px;
            border-radius: 40px;
            font-size: 0.75rem;
            font-weight: 500;
            color: #1E293B;
        }
        /* features 区域保留原有样式 */
        .features {
            padding: 90px 0;
            background: #F8FAFE;
        }
        .section-header {
            text-align: center;
            margin-bottom: 64px;
        }
        .section-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 16px;
            background: linear-gradient(120deg, #0F172A, #1E3A8A);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
        }
        .section-subtitle {
            color: #475569;
            max-width: 650px;
            margin: 0 auto;
            font-size: 1.05rem;
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
            gap: 32px;
        }
        .feature-card-new {
            background: white;
            border-radius: 32px;
            padding: 32px 24px;
            transition: all 0.3s ease;
            border: 1px solid #EFF3F8;
            box-shadow: 0 4px 12px rgba(0,0,0,0.02);
        }
        .feature-card-new:hover {
            transform: translateY(-6px);
            border-color: #C7DDFF;
            box-shadow: 0 24px 40px -16px rgba(37,99,235,0.2);
        }
        .feature-icon-new {
            width: 56px;
            height: 56px;
            background: #EFF6FF;
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            color: #2563EB;
        }
        .feature-card-new h3 {
            font-size: 1.45rem;
            margin-bottom: 12px;
            font-weight: 700;
        }
        .feature-card-new p {
            color: #475569;
            line-height: 1.5;
        }
        .deep-tech {
            padding: 80px 0;
            background: linear-gradient(112deg, #FFFFFF 0%, #F1F5FE 100%);
        }
        .tech-showcase {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }
        .tech-info {
            flex: 1;
        }
        .tech-info h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 20px;
        }
        .tech-list {
            list-style: none;
            margin: 24px 0;
        }
        .tech-list li {
            display: flex;
            gap: 12px;
            margin-bottom: 18px;
            align-items: center;
        }
        .check-icon {
            width: 26px;
            height: 26px;
            background: #2563EB10;
            border-radius: 30px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #2563EB;
        }
        .cloud-phone-new {
            padding: 90px 0;
            background: #0B1120;
            color: white;
        }
        .cloud-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            align-items: center;
        }
        .cloud-desc {
            flex: 1;
        }
        .cloud-desc h2 {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 20px;
        }
        .cloud-feature-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin: 32px 0;
        }
        .cloud-feat-item {
            display: flex;
            align-items: center;
            gap: 12px;
            background: rgba(255,255,255,0.05);
            padding: 12px 18px;
            border-radius: 60px;
            backdrop-filter: blur(4px);
        }
        .phone-3d {
            flex: 1;
            background: radial-gradient(circle at 30% 20%, #1E293B, #020617);
            border-radius: 48px;
            padding: 30px 20px;
            text-align: center;
            border: 1px solid rgba(37,99,235,0.5);
        }
        .trust-section {
            padding: 70px 0;
            background: white;
            text-align: center;
        }
        .badge-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 40px;
            margin-top: 40px;
        }
        .badge-item {
            background: #F8FAFE;
            border-radius: 80px;
            padding: 10px 24px;
            font-weight: 500;
        }
        /* 新增：号召下载区域 */
        .download-cta {
            background: linear-gradient(135deg, #0F172A 0%, #1E3A8A 100%);
            padding: 70px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .download-cta:before {
            content: "";
            position: absolute;
            top: -30%;
            left: -20%;
            width: 140%;
            height: 140%;
            background: radial-gradient(circle, rgba(37,99,235,0.15) 0%, transparent 70%);
            pointer-events: none;
        }
        .download-card {
            position: relative;
            z-index: 2;
            max-width: 700px;
            margin: 0 auto;
            background: rgba(255,255,255,0.05);
            backdrop-filter: blur(8px);
            border-radius: 64px;
            padding: 48px 32px;
            border: 1px solid rgba(255,255,255,0.2);
        }
        .download-card h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: white;
            margin-bottom: 16px;
        }
        .download-card p {
            color: #CBD5E1;
            font-size: 1.05rem;
            margin-bottom: 32px;
        }
        .download-buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn-download {
            background: white;
            color: #0F172A;
            padding: 12px 32px;
            border-radius: 48px;
            font-weight: 700;
            transition: 0.2s;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-download:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 20px -8px rgba(0,0,0,0.3);
            background: #F1F5F9;
        }
        .btn-download-outline {
            background: transparent;
            border: 1px solid white;
            color: white;
        }
        .btn-download-outline:hover {
            background: rgba(255,255,255,0.1);
        }
        /* 问答区域 */
        .faq-section {
            padding: 80px 0;
            background: #F8FAFE;
        }
        .faq-grid {
            max-width: 900px;
            margin: 48px auto 0;
        }
        .faq-item {
            background: white;
            border-radius: 28px;
            margin-bottom: 20px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.02);
            border: 1px solid #E9EEF3;
            transition: 0.2s;
        }
        .faq-question {
            padding: 22px 28px;
            font-size: 1.18rem;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: #0F172A;
        }
        .faq-question:after {
            content: "+";
            font-size: 1.6rem;
            font-weight: 400;
            color: #2563EB;
            transition: transform 0.2s;
        }
        .faq-item.active .faq-question:after {
            content: "−";
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
            padding: 0 28px;
            color: #475569;
            line-height: 1.6;
            border-top: 0px solid transparent;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 28px 24px 28px;
            border-top: 1px solid #EFF3F8;
        }
        footer {
            background: #0F172A;
            color: #CBD5E1;
            padding: 56px 0 32px;
        }
        .footer-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 40px;
            margin-bottom: 48px;
        }
        .footer-brand p {
            max-width: 260px;
            margin-top: 16px;
            font-size: 0.85rem;
        }
        .footer-links h4 {
            color: white;
            margin-bottom: 18px;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #94A3B8;
            text-decoration: none;
            font-size: 0.85rem;
        }
        .footer-links a:hover { color: #60A5FA; }
        .footer-bottom {
            border-top: 1px solid #1E293B;
            padding-top: 28px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            font-size: 0.8rem;
        }
        @media (max-width: 768px) {
            .hero-title { font-size: 2.2rem; }
            .header-content nav { display: none; }
            .header-actions .btn-outline { display: none; }
            .hero-grid { flex-direction: column; }
            .cloud-feature-list { grid-template-columns: 1fr; }
            .download-card { margin: 0 16px; padding: 32px 20px; }
        }