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

        body {
            font-family: 'Inter', sans-serif;
            background-color: #0A0C1A;
            color: #EFF0F5;
            line-height: 1.5;
            scroll-behavior: smooth;
        }

        /* 滚动条美化 */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #1A1E2F;
        }
        ::-webkit-scrollbar-thumb {
            background: #F7931A;
            border-radius: 10px;
        }

        /* 容器通用 */
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 固定导航栏 */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(10, 12, 26, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(247, 147, 26, 0.2);
            z-index: 1000;
            transition: all 0.3s ease;
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.9rem 2rem;
            max-width: 1400px;
            margin: 0 auto;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 800;
            background: linear-gradient(135deg, #F7931A 0%, #FFB347 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-decoration: none;
            letter-spacing: -0.5px;
        }
        .logo span {
            font-size: 1rem;
            font-weight: 500;
            background: none;
            -webkit-background-clip: unset;
            background-clip: unset;
            color: #F7931A;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
            list-style: none;
        }
        .nav-links li a {
            color: #EFF0F5;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.2s;
            font-size: 1rem;
        }
        .nav-links li a:hover, .nav-links li a.active {
            color: #F7931A;
        }
        .nav-download-btn {
            background: linear-gradient(95deg, #F7931A 0%, #E67E22 100%);
            padding: 0.5rem 1.4rem;
            border-radius: 40px;
            color: #0A0C1A !important;
            font-weight: 700;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .nav-download-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 14px rgba(247, 147, 26, 0.4);
            color: #0A0C1A !important;
        }
        /* 汉堡菜单 */
        .menu-icon {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: #F7931A;
        }
        @media (max-width: 860px) {
            .nav-links {
                position: fixed;
                top: 70px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 70px);
                background: rgba(10, 12, 26, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                justify-content: flex-start;
                padding: 2rem 0;
                gap: 2rem;
                transition: left 0.3s ease;
                z-index: 999;
                overflow-y: auto;
            }
            .nav-links.active {
                left: 0;
            }
            .menu-icon {
                display: block;
            }
            .nav-links li a {
                font-size: 1.2rem;
            }
            .nav-download-btn {
                margin-top: 0.5rem;
            }
            .nav-container {
                padding: 0.8rem 1.5rem;
            }
        }

        /* 偏移锚点（避免固定栏遮挡） */
        section {
            scroll-margin-top: 80px;
        }

        /* Hero 主视觉 */
        .hero {
            padding: 140px 0 80px;
            background: radial-gradient(circle at 10% 30%, rgba(247,147,26,0.08), transparent 70%);
        }
        .hero-grid {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 2rem;
        }
        .hero-content {
            flex: 1;
            min-width: 280px;
        }
        .hero-content h1 {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 1.5rem;
            background: linear-gradient(to right, #FFFFFF, #FFD19B);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .hero-content p {
            font-size: 1.2rem;
            color: #B9C2D4;
            margin-bottom: 2rem;
            max-width: 550px;
        }
        .btn-group {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .btn-primary {
            background: linear-gradient(95deg, #F7931A, #E67E22);
            border: none;
            padding: 0.9rem 2rem;
            border-radius: 48px;
            font-weight: 700;
            font-size: 1rem;
            color: #0A0C1A;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(247,147,26,0.3);
        }
        .btn-outline {
            background: transparent;
            border: 1.5px solid #F7931A;
            padding: 0.9rem 2rem;
            border-radius: 48px;
            font-weight: 600;
            color: #F7931A;
            cursor: pointer;
            transition: all 0.2s;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-outline:hover {
            background: rgba(247,147,26,0.1);
            border-color: #FFB347;
        }
        .hero-stats {
            flex: 0.8;
            min-width: 260px;
            background: rgba(20, 27, 43, 0.6);
            backdrop-filter: blur(12px);
            border-radius: 32px;
            padding: 1.8rem;
            border: 1px solid rgba(247,147,26,0.3);
        }
        .stat-item {
            margin-bottom: 1.5rem;
        }
        .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: #F7931A;
        }

        /* 通用标题样式 */
        .section-title {
            text-align: center;
            font-size: 2.4rem;
            font-weight: 700;
            margin-bottom: 3rem;
            letter-spacing: -0.02em;
        }
        .section-title span {
            color: #F7931A;
        }

        /* 卡片网格 */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
            margin: 2rem 0 3rem;
        }
        .feature-card, .chain-card, .security-card {
            background: #12172B;
            border-radius: 28px;
            padding: 2rem 1.5rem;
            transition: all 0.3s ease;
            border: 1px solid rgba(247,147,26,0.15);
            backdrop-filter: blur(4px);
        }
        .feature-card:hover, .chain-card:hover, .security-card:hover {
            border-color: #F7931A;
            transform: translateY(-6px);
            box-shadow: 0 20px 35px -12px rgba(0,0,0,0.4);
        }
        .card-icon {
            font-size: 2.5rem;
            color: #F7931A;
            margin-bottom: 1.2rem;
        }
        .feature-card h3, .chain-card h3, .security-card h3 {
            font-size: 1.5rem;
            margin-bottom: 0.8rem;
        }
        .feature-card p, .security-card p {
            color: #AAB3C8;
            line-height: 1.5;
        }
        /* 公链图标行 */
        .chain-icon-list {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-top: 1rem;
        }
        .chain-badge {
            background: rgba(247,147,26,0.12);
            padding: 0.5rem 1rem;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .chain-badge i {
            font-size: 1.1rem;
        }

        /* FAQ 折叠面板 */
        .faq-list {
            max-width: 900px;
            margin: 0 auto 3rem;
        }
        .faq-item {
            background: #12172B;
            border-radius: 20px;
            margin-bottom: 1rem;
            border: 1px solid rgba(247,147,26,0.2);
            overflow: hidden;
        }
        .faq-question {
            padding: 1.3rem 1.8rem;
            font-weight: 600;
            font-size: 1.1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            transition: background 0.2s;
        }
        .faq-question:hover {
            background: rgba(247,147,26,0.08);
        }
        .faq-question i {
            color: #F7931A;
            transition: transform 0.3s;
        }
        .faq-answer {
            max-height: 0;
            padding: 0 1.8rem;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s;
            color: #B9C2D4;
            border-top: 1px solid transparent;
        }
        .faq-item.active .faq-answer {
            max-height: 250px;
            padding: 0 1.8rem 1.3rem 1.8rem;
            border-top-color: rgba(247,147,26,0.3);
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }

        /* 下载区域 */
        .download-section {
            background: linear-gradient(145deg, #0F1427, #090C18);
            border-radius: 48px;
            padding: 3rem 2rem;
            margin: 2rem 0 4rem;
            text-align: center;
            border: 1px solid rgba(247,147,26,0.3);
        }
        .download-buttons {
            display: flex;
            justify-content: center;
            gap: 1.5rem;
            flex-wrap: wrap;
            margin-top: 2rem;
        }
        .download-btn {
            background: #1E253E;
            padding: 0.9rem 2rem;
            border-radius: 60px;
            display: inline-flex;
            align-items: center;
            gap: 12px;
            font-weight: 600;
            transition: all 0.2s;
            text-decoration: none;
            color: #EFF0F5;
            border: 1px solid rgba(247,147,26,0.4);
        }
        .download-btn i {
            font-size: 1.5rem;
            color: #F7931A;
        }
        .download-btn:hover {
            background: #F7931A;
            color: #0A0C1A;
            transform: scale(1.02);
        }
        .download-btn:hover i {
            color: #0A0C1A;
        }
        .qr-hint {
            margin-top: 2rem;
            font-size: 0.85rem;
            opacity: 0.7;
        }

        /* 底部 */
        footer {
            border-top: 1px solid rgba(247,147,26,0.2);
            padding: 2rem 0;
            text-align: center;
            color: #7E88A3;
            font-size: 0.85rem;
        }

        /* 辅助 */
        .text-center {
            text-align: center;
        }
        @media (max-width: 640px) {
            .hero-content h1 {
                font-size: 2.2rem;
            }
            .section-title {
                font-size: 1.9rem;
            }
        }