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

        body {
            font-family: 'Inter', sans-serif;
            /* 全局无缝渐变背景：柔和流动感，消除板块断层 */
            background: linear-gradient(145deg, #fff5f7 0%, #fef1fa 20%, #ffeef4 40%, #fff3e8 60%, #fef9ef 80%, #fff5fc 100%);
            color: #111827;
            line-height: 1.5;
            scroll-behavior: smooth;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 导航栏 - 磨砂玻璃，与背景融合 */
        .navbar {
            position: sticky;
            top: 0;
            background: rgba(255, 245, 250, 0.75);
            backdrop-filter: blur(16px);
            z-index: 100;
            border-bottom: 1px solid rgba(99, 102, 241, 0.25);
            padding: 14px 0;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }

        .logo {
            font-size: 1.7rem;
            font-weight: 800;
            background: linear-gradient(135deg, #6366f1, #ec489a, #f97316);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: -0.3px;
        }

        .nav-links {
            display: flex;
            gap: 2rem;
            align-items: center;
        }

        .nav-links a {
            text-decoration: none;
            font-weight: 500;
            color: #1f2937;
            transition: 0.2s;
            font-size: 0.95rem;
        }

        .nav-links a:hover {
            background: linear-gradient(135deg, #6366f1, #ec489a);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .download-nav-btn {
            background: linear-gradient(95deg, #6366f1, #f43f5e);
            padding: 8px 20px;
            border-radius: 40px;
            color: white !important;
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
            transition: all 0.2s;
        }

        .download-nav-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
            background: linear-gradient(95deg, #4f46e5, #e11d48);
        }

        /* Hero 区域 — 半透明磨砂，透出body渐变 */
        .hero {
            padding: 80px 0 70px;
            text-align: center;
            background: rgba(255, 248, 250, 0.55);
            backdrop-filter: blur(2px);
            border-radius: 0 0 48px 48px;
            margin-bottom: 8px;
        }

        .hero h1 {
            font-size: 3.8rem;
            font-weight: 800;
            background: linear-gradient(135deg, #0F172A, #6366f1, #f97316);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }

        .hero-sub {
            font-size: 1.2rem;
            background: linear-gradient(135deg, #4b5563, #6b21a5);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            font-weight: 500;
            margin-bottom: 20px;
        }

        .hero-en {
            font-size: 1rem;
            font-weight: 400;
            color: #6c757d;
            margin-bottom: 28px;
            letter-spacing: 1px;
        }

        .hero-buttons {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            margin: 32px 0 20px;
        }

        .btn-primary {
            background: linear-gradient(95deg, #6366f1, #f97316);
            color: white;
            border: none;
            padding: 14px 38px;
            border-radius: 60px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: all 0.3s;
            box-shadow: 0 6px 16px rgba(99, 102, 241, 0.3);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 24px rgba(99, 102, 241, 0.4);
            background: linear-gradient(95deg, #4f46e5, #ea580c);
        }

        .btn-outline {
            background: rgba(255, 255, 245, 0.5);
            backdrop-filter: blur(4px);
            border: 1.5px solid rgba(203, 213, 225, 0.8);
            padding: 14px 36px;
            border-radius: 60px;
            font-weight: 600;
            color: #1e293b;
            transition: 0.2s;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-outline:hover {
            border-color: #f97316;
            background: rgba(249, 115, 22, 0.1);
            color: #f97316;
            transform: translateY(-2px);
        }

        .hero-tagline {
            font-size: 0.9rem;
            background: linear-gradient(135deg, #6366f1, #ec489a);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            font-weight: 500;
            margin-top: 32px;
        }

        /* 功能卡片板块 — 半透明卡片，背景透出body渐变 */
        .features-section {
            padding: 70px 0 60px;
            background: rgba(255, 245, 250, 0.4);
            backdrop-filter: blur(2px);
            border-radius: 48px;
            margin: 12px 0;
        }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 40px;
            margin-top: 20px;
        }

        .feature-card {
            text-align: center;
            padding: 32px 20px;
            border-radius: 36px;
            transition: all 0.35s cubic-bezier(0.2, 0.9, 0.4, 1.1);
            background: rgba(255, 255, 255, 0.75);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.6);
            box-shadow: 0 10px 25px -8px rgba(0, 0, 0, 0.05);
        }

        .feature-card:nth-child(1) {
            border-bottom: 3px solid #f472b6;
            background: linear-gradient(135deg, rgba(255, 240, 247, 0.8), rgba(255, 245, 250, 0.6));
        }

        .feature-card:nth-child(2) {
            border-bottom: 3px solid #3b82f6;
            background: linear-gradient(135deg, rgba(240, 244, 255, 0.8), rgba(245, 240, 255, 0.6));
        }

        .feature-card:nth-child(3) {
            border-bottom: 3px solid #f59e0b;
            background: linear-gradient(135deg, rgba(255, 247, 224, 0.8), rgba(255, 240, 220, 0.6));
        }

        .feature-card:nth-child(4) {
            border-bottom: 3px solid #10b981;
            background: linear-gradient(135deg, rgba(230, 247, 236, 0.8), rgba(225, 245, 235, 0.6));
        }

        .feature-card:hover {
            transform: translateY(-12px);
            box-shadow: 0 25px 40px -12px rgba(0, 0, 0, 0.2);
            background: rgba(255, 255, 255, 0.9);
        }

        .feature-icon {
            width: 72px;
            height: 72px;
            line-height: 72px;
            border-radius: 32px;
            margin: 0 auto 20px;
            font-size: 2rem;
            background: linear-gradient(135deg, #6366f1, #f472b6);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .feature-card h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 12px;
            background: linear-gradient(135deg, #1e293b, #4b5563);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .feature-card p {
            color: #2d3a4b;
            font-size: 0.95rem;
        }

        /* 下载区域 — 半透明柔光，无缝衔接 */
        .download-area {
            padding: 70px 0;
            background: rgba(253, 242, 251, 0.5);
            backdrop-filter: blur(3px);
            border-radius: 48px;
            margin: 12px 0;
        }

        .section-title {
            text-align: center;
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 48px;
            background: linear-gradient(135deg, #0f172a, #6366f1, #f97316);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .download-flex {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 48px;
        }

        .download-option {
            border-radius: 56px;
            flex: 1;
            min-width: 280px;
            padding: 40px 28px;
            text-align: center;
            transition: all 0.3s;
            backdrop-filter: blur(8px);
            background: rgba(255, 250, 245, 0.8);
            border: 1px solid rgba(255, 255, 255, 0.6);
            box-shadow: 0 15px 30px -12px rgba(0, 0, 0, 0.05);
        }

        .download-option:first-child {
            background: linear-gradient(145deg, rgba(255, 245, 250, 0.9), rgba(255, 235, 245, 0.7));
            border-bottom: 4px solid #f472b6;
        }

        .download-option:last-child {
            background: linear-gradient(145deg, rgba(245, 245, 255, 0.9), rgba(235, 240, 255, 0.7));
            border-bottom: 4px solid #6366f1;
        }

        .download-option:hover {
            transform: translateY(-10px);
            background: rgba(255, 255, 255, 0.95);
        }

        /* 修复图标溢出问题：使用 flex 居中，两个图标都在 div 内部 */
        .icon-badge {
            width: 100px;
            height: 100px;
            border-radius: 50%;
            margin: 0 auto 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            font-size: 2.2rem;
            background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.9), rgba(99, 102, 241, 0.1));
        }

        .download-option:first-child .icon-badge {
            color: #f43f5e;
            background: radial-gradient(circle, #ffe4f0, #fff0f7);
        }

        .download-option:last-child .icon-badge {
            color: #6366f1;
            background: radial-gradient(circle, #eef2ff, #ffffff);
        }

        .download-option h3 {
            font-size: 1.8rem;
            margin-bottom: 12px;
            background: linear-gradient(135deg, #1e293b, #6366f1);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .download-btn {
            border: none;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            margin-top: 20px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
            transition: all 0.25s;
            color: white;
        }

        .download-btn.app-btn {
            background: linear-gradient(95deg, #f43f5e, #f97316);
            box-shadow: 0 8px 18px rgba(244, 63, 94, 0.3);
        }

        .download-btn.sim-btn {
            background: linear-gradient(95deg, #3b82f6, #8b5cf6);
            box-shadow: 0 8px 18px rgba(59, 130, 246, 0.3);
        }

        .download-btn:hover {
            transform: translateY(-3px);
            filter: brightness(1.02);
            box-shadow: 0 12px 24px rgba(0, 0, 0, 0.2);
        }

        .version-info {
            margin-top: 20px;
            font-size: 0.75rem;
            color: #6b7280;
            background: rgba(0, 0, 0, 0.02);
            padding: 6px 12px;
            border-radius: 60px;
            display: inline-block;
        }

        /* 联系方式区块 — 半透明磨砂，融入背景 */
        .contact-block {
            padding: 70px 0 70px;
            background: rgba(255, 245, 250, 0.45);
            backdrop-filter: blur(3px);
            border-radius: 48px;
            margin: 12px 0;
        }

        .contact-card {
            max-width: 820px;
            margin: 0 auto;
            background: rgba(255, 250, 245, 0.85);
            backdrop-filter: blur(10px);
            border-radius: 64px;
            padding: 48px 40px;
            box-shadow: 0 25px 45px -12px rgba(0, 0, 0, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.6);
        }

        .contact-card h1 {
            font-size: 2.3rem;
            font-weight: 700;
            margin-bottom: 32px;
            text-align: center;
            background: linear-gradient(135deg, #6366f1, #ec489a);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .contact-info {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        /* 保留 flex l1 l2 类，增加柔和背景 */
        .flex {
            display: flex;
            align-items: center;
            gap: 18px;
            background: rgba(255, 248, 245, 0.8);
            padding: 18px 28px;
            border-radius: 60px;
            transition: all 0.25s;
            border: 1px solid rgba(99, 102, 241, 0.15);
            backdrop-filter: blur(2px);
        }

        .flex:hover {
            border-color: #f472b6;
            background: rgba(255, 255, 255, 0.95);
            transform: scale(1.01);
        }

        .flex i {
            font-style: normal;
            font-size: 1rem;
            line-height: 1.4;
            color: #1f2a44;
        }

        .contact-info .flex i:first-child {
            font-size: 1.4rem;
            width: 32px;
            background: linear-gradient(135deg, #6366f1, #f43f5e);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .l1,
        .l2 {
            margin: 0;
        }

        .extra-contact-line {
            text-align: center;
            margin-top: 28px;
            font-size: 0.85rem;
            background: linear-gradient(95deg, rgba(240, 242, 255, 0.7), rgba(255, 238, 247, 0.7));
            padding: 12px;
            border-radius: 80px;
            color: #4b5563;
            font-weight: 500;
        }

        /* 页脚 — 半透明深色但保留融合感 */
        .footer {
            background: rgba(15, 23, 42, 0.8);
            backdrop-filter: blur(10px);
            color: #cbd5e6;
            padding: 48px 0 36px;
            border-top: 1px solid rgba(99, 102, 241, 0.2);
            margin-top: 20px;
            border-radius: 48px 48px 0 0;
        }

        .footer-inner {
            text-align: center;
        }

        .footer-links {
            display: flex;
            justify-content: center;
            gap: 32px;
            flex-wrap: wrap;
            margin-bottom: 24px;
        }

        .footer-links a {
            color: #cbd5e1;
            text-decoration: none;
            font-size: 0.85rem;
            transition: 0.2s;
        }

        .footer-links a:hover {
            background: linear-gradient(135deg, #c084fc, #f472b6);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .copyright {
            font-size: 0.85rem;
            margin: 12px 0;
            color: #a5b4fc;
        }

        .beian-group {
            display: flex;
            justify-content: center;
            gap: 28px;
            flex-wrap: wrap;
            margin-top: 16px;
        }

        .beian-group a {
            color: #94a3b8;
            text-decoration: none;
            font-size: 0.75rem;
        }

        .beian-group a:hover {
            color: #f472b6;
        }

        @media (max-width: 720px) {
            .hero h1 {
                font-size: 2.5rem;
            }

            .nav-container {
                flex-direction: column;
            }

            .nav-links {
                gap: 1.2rem;
            }

            .contact-card {
                padding: 32px 20px;
            }

            .flex {
                flex-direction: column;
                text-align: center;
                gap: 10px;
            }

            .feature-card {
                padding: 28px 16px;
            }

            .icon-badge {
                width: 80px;
                height: 80px;
                font-size: 1.8rem;
            }
        }

        button {
            cursor: pointer;
        }