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

        ::-webkit-scrollbar { width: 8px; }
        ::-webkit-scrollbar-thumb { background: linear-gradient(180deg, #6366f1, #3b82f6); border-radius: 4px; }
        ::-webkit-scrollbar-track { background: #0a0a1a; }

        a { text-decoration: none; color: inherit; }

        body {
            background-color: #0a0a1a;
            background-image:
                radial-gradient(circle at top right, rgba(98, 143, 255, 0.1), transparent 50%),
                radial-gradient(circle at bottom left, rgba(138, 35, 245, 0.1), transparent 50%);
            color: #fff;
            overflow-x: hidden;
            min-height: 100vh;
            font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
            padding-bottom: 75px;
        }

        /* ══════════════════════════════════════════
           顶部导航栏
           ══════════════════════════════════════════ */
        .mobile-header {
            position: fixed;
            top: 0; left: 0;
            width: 100%;
            background: rgba(10, 10, 26, 0.92);
            backdrop-filter: blur(12px);
            padding: 10px 15px;
            z-index: 1000;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid rgba(98, 143, 255, 0.2);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
        }

        .mobile-logo { height: 35px; filter: drop-shadow(0 0 5px rgba(123, 158, 255, 0.7)); }

        .header-title {
            color: #7b9eff;
            font-size: 16px;
            font-weight: 700;
            flex: 1;
            margin-left: 10px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .mobile-menu-btn {
            background: transparent;
            border: none;
            color: #7b9eff;
            font-size: 22px;
            cursor: pointer;
            width: 40px; height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            transition: all 0.3s;
        }

        .mobile-menu-btn:active { background: rgba(123, 158, 255, 0.2); transform: scale(0.95); }

        .mobile-menu {
            position: fixed;
            top: 56px; left: 0;
            width: 100%;
            background: rgba(15, 25, 45, 0.97);
            backdrop-filter: blur(15px);
            z-index: 999;
            display: none;
            padding: 15px;
            border-bottom: 1px solid rgba(98, 143, 255, 0.2);
            box-shadow: 0 5px 25px rgba(0, 0, 0, 0.4);
        }

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

        .mobile-menu-btn-item {
            display: block;
            width: 100%;
            padding: 14px 18px;
            background: rgba(30, 45, 85, 0.4);
            border: 1px solid rgba(98, 143, 255, 0.2);
            border-radius: 12px;
            color: #b0c8ff;
            font-size: 14px;
            font-weight: 500;
            text-align: left;
            cursor: pointer;
            line-height: 1.5;
        }

        .mobile-menu-btn-item i { margin-right: 10px; color: #7b9eff; }

        /* ══════════════════════════════════════════
           第一段：Hero + 幻灯片
           ══════════════════════════════════════════ */
        .hero-section {
            position: relative;
            padding: 100px 0px 40px;
            text-align: center;
            overflow: hidden;
            background:
                radial-gradient(ellipse 80% 60% at 50% 0%, rgba(99, 102, 241, 0.15) 0%, transparent 70%),
                radial-gradient(ellipse 60% 50% at 80% 100%, rgba(59, 130, 246, 0.1) 0%, transparent 60%),
                radial-gradient(ellipse 40% 40% at 10% 60%, rgba(138, 35, 245, 0.08) 0%, transparent 50%);
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background-image:
                radial-gradient(1.5px 1.5px at 10% 20%, rgba(123, 158, 255, 0.5) 50%, transparent 50%),
                radial-gradient(1px 1px at 30% 60%, rgba(99, 102, 241, 0.4) 50%, transparent 50%),
                radial-gradient(2px 2px at 60% 15%, rgba(59, 130, 246, 0.5) 50%, transparent 50%),
                radial-gradient(1px 1px at 80% 45%, rgba(123, 158, 255, 0.3) 50%, transparent 50%),
                radial-gradient(1.5px 1.5px at 45% 80%, rgba(99, 102, 241, 0.4) 50%, transparent 50%),
                radial-gradient(1px 1px at 90% 75%, rgba(59, 130, 246, 0.3) 50%, transparent 50%);
            animation: twinkle 4s ease-in-out infinite alternate;
            pointer-events: none;
        }

        @keyframes twinkle { 0% { opacity: 0.5; } 100% { opacity: 1; } }

        .hero-deco {
            position: absolute;
            border: 1px solid rgba(99, 102, 241, 0.12);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-deco-1 { width: 120px; height: 120px; top: 8%; left: -30px; animation: floatSlow 8s ease-in-out infinite; }
        .hero-deco-2 { width: 80px; height: 80px; top: 15%; right: -20px; border-color: rgba(59, 130, 246, 0.12); animation: floatSlow 6s ease-in-out infinite reverse; }
        .hero-deco-3 { width: 50px; height: 50px; bottom: 10%; left: 12%; border-color: rgba(138, 35, 245, 0.1); animation: floatSlow 7s ease-in-out infinite 1s; }

        @keyframes floatSlow {
            0%, 100% { transform: translateY(0) rotate(0deg); }
            50% { transform: translateY(-15px) rotate(180deg); }
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            background: rgba(99, 102, 241, 0.15);
            border: 1px solid rgba(99, 102, 241, 0.3);
            border-radius: 50px;
            font-size: 13px;
            color: #94a3b8;
            margin: 0 auto 22px;
            animation: fadeSlideDown 0.6s ease-out;
            backdrop-filter: blur(10px);
        }

        .hero-badge i { color: #6366f1; font-size: 11px; }

        .hero-row { display: block; text-align: center; }

        .hero-title-wrap {
            position: relative;
            display: inline-block;
            margin-bottom: 18px;
            animation: fadeSlideDown 0.8s ease-out;
        }

        .hero-title {
            font-size: 36px;
            font-weight: 900;
            letter-spacing: 2px;
            line-height: 1.3;
            background: linear-gradient(135deg, #7b9eff 0%, #6366f1 30%, #3b82f6 60%, #a78bfa 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-size: 200% 200%;
            animation: gradientShift 5s ease infinite;
            filter: drop-shadow(0 0 30px rgba(99, 102, 241, 0.3));
        }

        @keyframes gradientShift {
            0%, 100% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
        }

        .hero-title-wrap::after {
            content: '';
            position: absolute;
            bottom: -8px; left: 50%;
            transform: translateX(-50%);
            width: 70px; height: 3px;
            background: linear-gradient(90deg, transparent, #6366f1, #3b82f6, transparent);
            border-radius: 2px;
        }

        .hero-subtitle {
            font-size: 14px;
            color: #64748b;
            margin-top: 20px;
            line-height: 1.8;
            animation: fadeSlideDown 1s ease-out;
            letter-spacing: 0.5px;
        }

        .hero-subtitle i { color: #6366f1; margin-right: 6px; font-size: 12px; }

        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 30px;
            margin-top: 25px;
            animation: fadeSlideDown 1.1s ease-out;
        }

        .hero-stat {
            text-align: center;
        }

        .hero-stat-num {
            font-size: 28px;
            font-weight: 900;
            background: linear-gradient(135deg, #6366f1, #3b82f6);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-stat-label {
            font-size: 12px;
            color: #475569;
            margin-top: 4px;
        }

        /* 幻灯片 */
        .carousel-wrap {
            padding: 25px 15px 10px;
            position: relative;
        }

        .mobile-carousel {
            position: relative;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(98, 143, 255, 0.2);
            touch-action: pan-y pinch-zoom;
            cursor: grab;
        }

        .mobile-carousel:active { cursor: grabbing; }
        .mobile-carousel img { pointer-events: none; user-select: none; }

        .mobile-carousel::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0;
            height: 0px;
            background: linear-gradient(90deg, #6366f1, #3b82f6, #6366f1);
            z-index: 5;
        }

        .mobile-carousel-images {
            display: flex;
            width: 100%; height: 100%;
            transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        .mobile-carousel-images.no-transition { transition: none; }

        .mobile-carousel-image {
            flex: 0 0 100%;
            height: 100%;
            object-fit: cover;
        }

        .mobile-carousel-controls {
            position: absolute;
            bottom: 10px; left: 0; right: 0;
            display: flex;
            justify-content: center;
            gap: 8px;
            z-index: 5;
        }

        .mobile-carousel-dot {
            width: 8px; height: 8px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.35);
            cursor: pointer;
            transition: all 0.3s;
        }

        .mobile-carousel-dot.active {
            background: #3b82f6;
            transform: scale(1.3);
            box-shadow: 0 0 8px rgba(59, 130, 246, 0.6);
        }

        .mobile-carousel-arrow {
            position: absolute;
            top: 50%; transform: translateY(-50%);
            width: 36px; height: 36px;
            background: rgba(20, 30, 50, 0.6);
            border-radius: 50%;
            border: 1px solid rgba(98, 143, 255, 0.2);
            color: #b0c8ff;
            font-size: 16px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 10;
            transition: all 0.3s;
            backdrop-filter: blur(5px);
        }

        .mobile-carousel-arrow:active { background: rgba(59, 130, 246, 0.4); }
        .mobile-prev { left: 10px; }
        .mobile-next { right: 10px; }

        .mobile-auto-switch {
            position: absolute;
            top: 12px; right: 12px;
            background: rgba(10, 10, 26, 0.7);
            color: #64748b;
            font-size: 11px;
            padding: 5px 12px;
            border-radius: 20px;
            display: flex;
            align-items: center;
            gap: 5px;
            z-index: 5;
            border: 1px solid rgba(98, 143, 255, 0.1);
            backdrop-filter: blur(5px);
        }

        /* ══════════════════════════════════════════
           分割线
           ══════════════════════════════════════════ */
        .section-divider {
            position: relative;
            width: 100%;
            height: 55px;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }

        .section-divider::before {
            content: '';
            position: absolute;
            left: 0; right: 0; top: 50%;
            height: 1px;
            background: linear-gradient(90deg,
                transparent 0%,
                rgba(99, 102, 241, 0.1) 10%,
                rgba(99, 102, 241, 0.5) 30%,
                rgba(59, 130, 246, 0.8) 50%,
                rgba(99, 102, 241, 0.5) 70%,
                rgba(99, 102, 241, 0.1) 90%,
                transparent 100%
            );
        }

        .section-divider::after {
            content: '';
            position: absolute;
            left: 50%; top: 50%;
            transform: translate(-50%, -50%);
            width: 200px; height: 40px;
            background: radial-gradient(ellipse, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
        }

        .divider-icon {
            position: relative;
            z-index: 2;
            width: 34px; height: 34px;
            background: #0a0a1a;
            border: 1px solid rgba(99, 102, 241, 0.4);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #6366f1;
            font-size: 12px;
            box-shadow: 0 0 20px rgba(99, 102, 241, 0.15);
        }

        /* ══════════════════════════════════════════
           小标题组件
           ══════════════════════════════════════════ */
        .section-label {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            margin-bottom: 20px;
        }

        .section-label-line {
            width: 40px; height: 1px;
            background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.5));
        }

        .section-label-line:last-child {
            background: linear-gradient(90deg, rgba(99, 102, 241, 0.5), transparent);
        }

        .section-label-text {
            font-size: 13px;
            color: #64748b;
            letter-spacing: 3px;
        }

        /* ══════════════════════════════════════════
           第二段：使用指南
           ══════════════════════════════════════════ */
        .guide-section {
            padding: 25px 15px 30px;
            position: relative;
            background:
                radial-gradient(ellipse 50% 40% at 50% 50%, rgba(59, 130, 246, 0.04) 0%, transparent 70%);
        }

        .guide-section-title {
            font-size: 22px;
            text-align: center;
            margin-bottom: 8px;
            font-weight: 900;
            background: linear-gradient(135deg, #7b9eff, #3b82f6);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .guide-section-desc {
            text-align: center;
            color: #475569;
            margin-bottom: 22px;
            font-size: 13px;
            line-height: 1.6;
        }

        .guide-steps { display: flex; flex-direction: column; gap: 12px; max-width: 720px; margin: 0 auto; }

        .guide-step {
            background: rgba(20, 30, 50, 0.5);
            border-radius: 14px;
            padding: 16px;
            display: flex;
            align-items: center;
            border: 1px solid rgba(98, 143, 255, 0.15);
            transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            position: relative;
            overflow: hidden;
            cursor: pointer;
        }

        .guide-step::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0;
            height: 2px;
            background: linear-gradient(90deg, #6366f1, #3b82f6);
            opacity: 0.4;
            transition: opacity 0.3s;
        }

        .guide-step:hover { background: rgba(30, 45, 85, 0.6); border-color: rgba(99, 102, 241, 0.3); transform: translateX(4px); }
        .guide-step:hover::before { opacity: 1; }
        .guide-step:active { transform: translateY(2px) translateX(0); }

        .step-number {
            width: 34px; height: 34px;
            border-radius: 10px;
            background: linear-gradient(135deg, #6366f1, #3b82f6);
            display: flex;
            justify-content: center;
            align-items: center;
            font-weight: 700;
            margin-right: 14px;
            flex-shrink: 0;
            font-size: 15px;
            box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
        }

        .step-content { flex: 1; min-width: 0; }

        .step-title {
            font-size: 16px;
            margin-bottom: 4px;
            color: #b0c8ff;
            font-weight: 600;
        }

        .step-desc {
            font-size: 13px;
            color: #64748b;
            line-height: 1.5;
        }

        .step-button {
            background: linear-gradient(135deg, #6366f1, #3b82f6);
            color: white;
            border: none;
            border-radius: 10px;
            padding: 8px 16px;
            font-size: 13px;
            cursor: pointer;
            flex-shrink: 0;
            font-weight: 600;
            transition: all 0.3s;
            box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
            margin-left: 12px;
        }

        .step-button:active { transform: translateY(2px); box-shadow: none; }

        /* ══════════════════════════════════════════
           第三段：产品展示 + 页脚
           ══════════════════════════════════════════ */
        .products-section {
            padding: 25px 15px 20px;
            position: relative;
            background:
                radial-gradient(ellipse 60% 40% at 30% 20%, rgba(138, 35, 245, 0.04) 0%, transparent 60%),
                radial-gradient(ellipse 50% 40% at 80% 80%, rgba(59, 130, 246, 0.04) 0%, transparent 60%);
        }

        .products-title {
            font-size: 22px;
            text-align: center;
            margin-bottom: 8px;
            font-weight: 900;
            background: linear-gradient(135deg, #7b9eff, #3b82f6);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .products-desc {
            text-align: center;
            font-size: 13px;
            color: #475569;
            margin-bottom: 20px;
            line-height: 1.6;
            padding: 0 10px;
        }

        .product-tabs {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin-bottom: 20px;
        }

        .product-tab {
            padding: 9px 20px;
            background: rgba(20, 30, 50, 0.5);
            border: 1px solid rgba(98, 143, 255, 0.2);
            border-radius: 25px;
            color: #7b9eff;
            font-size: 14px;
            cursor: pointer;
            transition: all 0.3s;
            font-weight: 500;
        }

        .product-tab.active {
            background: linear-gradient(135deg, #6366f1, #3b82f6);
            color: white;
            box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
            border-color: transparent;
        }

        .products-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 14px;
            max-width: 720px;
            margin: 0 auto;
        }

        .product-card {
            background: rgba(20, 30, 50, 0.5);
            border-radius: 14px;
            overflow: hidden;
            border: 1px solid rgba(98, 143, 255, 0.15);
            transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            position: relative;
        }

        .product-card::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0;
            height: 2px;
            background: linear-gradient(90deg, #6366f1, #3b82f6);
            opacity: 0;
            transition: opacity 0.3s;
            z-index: 2;
        }

        .product-card:hover { border-color: rgba(99, 102, 241, 0.3); transform: translateY(-3px); box-shadow: 0 10px 25px rgba(59, 130, 246, 0.15); }
        .product-card:hover::before { opacity: 1; }
        .product-card:active { transform: translateY(0); }

        .product-image {
            width: 100%;
            height: 310px;
            object-fit: cover;
            display: block;
        }

        .product-info { padding: 14px; }

        .product-name {
            font-size: 14px;
            margin-bottom: 8px;
            color: #b0c8ff;
            font-weight: 600;
            text-align: center;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .product-price {
            color: #ff9f0e;
            font-weight: 700;
            margin-bottom: 12px;
            font-size: 17px;
            text-align: center;
        }

        .product-buttons {
            display: flex;
            gap: 8px;
            justify-content: center;
        }

        .product-btn {
            flex: 1;
            padding: 10px;
            border-radius: 10px;
            border: none;
            font-size: 14px;
            cursor: pointer;
            font-weight: 600;
            transition: all 0.3s;
            text-align: center;
            display: block;
        }

        .product-btn:active { transform: translateY(2px); }

        .btn-download {
            background: linear-gradient(135deg, #6366f1, #3b82f6);
            color: white;
            box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
        }

        .btn-demo {
            background: rgba(255, 255, 255, 0.08);
            color: #b0c8ff;
            border: 1px solid rgba(98, 143, 255, 0.2);
        }

        /* ── 页脚 ── */
        .mobile-footer {
            padding: 40px 15px 25px;
            text-align: center;
            max-width: 720px;
            margin: 40px auto 0;
        }

        .footer-links {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 8px 20px;
            margin-bottom: 22px;
        }

        .footer-link {
            color: #475569;
            font-size: 13px;
            text-decoration: none;
            transition: color 0.3s;
            letter-spacing: 0.5px;
        }

        .footer-link:hover { color: #6366f1; }

        .social-links {
            display: flex;
            justify-content: center;
            gap: 16px;
            margin-bottom: 22px;
        }

        .social-link {
            color: #475569;
            font-size: 18px;
            transition: all 0.3s;
            text-decoration: none;
            width: 40px; height: 40px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            background: rgba(20, 30, 50, 0.5);
            border: 1px solid rgba(98, 143, 255, 0.1);
        }

        .social-link:hover { color: #6366f1; border-color: rgba(99, 102, 241, 0.3); transform: translateY(-2px); }

        .copyright {
            font-size: 12px;
            color: #334155;
            line-height: 1.8;
        }

        /* ── 底部导航 ── */
        .bottom-nav {
            position: fixed;
            bottom: 0; left: 0;
            width: 100%;
            background: rgba(10, 10, 26, 0.95);
            backdrop-filter: blur(15px);
            display: flex;
            justify-content: space-around;
            padding: 10px 0;
            border-top: 1px solid rgba(98, 143, 255, 0.2);
            z-index: 1000;
            box-shadow: 0 -5px 20px rgba(0, 0, 0, 0.3);
        }

        .nav-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            color: #475569;
            font-size: 11px;
            text-decoration: none;
            transition: all 0.3s;
            width: 20%;
            gap: 4px;
        }

        .nav-item:active { transform: translateY(2px); }

        .nav-icon { font-size: 18px; transition: all 0.3s; }

        .nav-item.active { color: #6366f1; }
        .nav-item.active .nav-icon { transform: scale(1.15); filter: drop-shadow(0 0 6px rgba(99, 102, 241, 0.5)); }

        /* ── QQ悬浮球 ── */
        .qq-ball {
            position: fixed;
            bottom: 75px; right: 18px;
            width: 50px; height: 50px;
            border-radius: 50%;
            background: linear-gradient(135deg, #6366f1, #3b82f6);
            display: flex;
            justify-content: center;
            align-items: center;
            color: white;
            font-size: 24px;
            z-index: 999;
            box-shadow: 0 5px 20px rgba(59, 130, 246, 0.5);
            transition: all 0.3s;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .qq-ball:active { transform: scale(0.92); }

        /* ── 动画 ── */
        @keyframes fadeSlideDown {
            from { opacity: 0; transform: translateY(-20px); }
            to { opacity: 1; transform: translateY(0); }
        }

        @keyframes fadeSlideUp {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* ── 响应式 ── */
        @media (max-width: 768px) {
            .hero-title { font-size: 30px; }
            .products-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 400px) {
            .hero-title { font-size: 26px; }
            .hero-stats { gap: 20px; }
            .hero-stat-num { font-size: 24px; }
            .product-image { height: 240px; }
        }