:root {
            --primary: #0F4C9E;
            --primary-light: #2563EB;
            --accent: #22D3EE;
            --accent-purple: #8B5CF6;
            --accent-pink: #EC4899;
            --gold: #F59E0B;
            --green: #10B981;
            --bg-dark: #050B1A;
            --bg-card: rgba(15, 32, 62, 0.7);
            --gradient-blue: linear-gradient(135deg, #0F4C9E 0%, #22D3EE 100%);
            --gradient-purple: linear-gradient(135deg, #7C3AED 0%, #EC4899 100%);
            --gradient-gold: linear-gradient(135deg, #D97706 0%, #FBBF24 100%);
            --gradient-green: linear-gradient(135deg, #059669 0%, #34D399 100%);
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            background: var(--bg-dark);
            color: #E2E8F0;
            overflow-x: hidden;
            line-height: 1.6;
        }
        .circuit-bg {
            background-image:
                linear-gradient(rgba(0, 240, 255, 0.025) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 240, 255, 0.025) 1px, transparent 1px);
            background-size: 50px 50px;
        }
        .nav-neon { box-shadow: 0 4px 30px rgba(15, 76, 158, 0.2); }
        .nav-link {
            position: relative;
            transition: all 0.15s ease;
            padding: 0.5rem 0;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0; left: 50%;
            width: 0; height: 2px;
            background: var(--gradient-blue);
            transition: all 0.15s ease;
            transform: translateX(-50%);
            box-shadow: 0 0 10px rgba(34, 211, 238, 0.5);
        }
        .nav-link:hover, .nav-link.active {
            color: var(--accent) !important;
            text-shadow: 0 0 20px rgba(34, 211, 238, 0.3);
        }
        .nav-link:hover::after, .nav-link.active::after { width: 100%; }
        .btn-primary {
            background: var(--gradient-blue);
            color: white;
            padding: 0.875rem 2rem;
            border-radius: 1rem;
            font-weight: 600;
            transition: all 0.15s ease;
            display: inline-flex;
            align-items: center;
            border: none;
            cursor: pointer;
            position: relative;
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
        }
        .btn-primary::before {
            content: '';
            position: absolute;
            top: 0; left: -100%;
            width: 100%; height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
            transition: left 0.5s ease;
        }
        .btn-primary:hover::before { left: 100%; }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(37, 99, 235, 0.5);
        }
        .gradient-text {
            background: var(--gradient-blue);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .data-flow {
            background: linear-gradient(90deg, #22D3EE, #8B5CF6, #EC4899, #22D3EE);
            background-size: 300% auto;
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            animation: dataFlow 4s linear infinite;
        }
        @keyframes dataFlow {
            0% { background-position: 0% center; }
            100% { background-position: 300% center; }
        }
        .glow-text {
            text-shadow: 0 0 30px rgba(34, 211, 238, 0.4), 0 0 60px rgba(34, 211, 238, 0.2);
        }
        .anim-fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.6s ease-out;
        }
        .anim-fade-up.visible { opacity: 1; transform: translateY(0); }
        .anim-fade-left {
            opacity: 0;
            transform: translateX(-30px);
            transition: all 0.6s ease-out;
        }
        .anim-fade-left.visible { opacity: 1; transform: translateX(0); }
        .anim-fade-right {
            opacity: 0;
            transform: translateX(30px);
            transition: all 0.6s ease-out;
        }
        .anim-fade-right.visible { opacity: 1; transform: translateX(0); }
        .delay-100 { transition-delay: 0.1s; }
        .delay-200 { transition-delay: 0.2s; }
        .delay-300 { transition-delay: 0.3s; }
        .delay-400 { transition-delay: 0.4s; }

        /* ========== 创新设计元素 ========== */

        /* 大数字展示 */
        .mega-number {
            font-size: clamp(3rem, 8vw, 6rem);
            font-weight: 900;
            line-height: 1;
            background: linear-gradient(180deg, #22D3EE 0%, rgba(34, 211, 238, 0.1) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.02em;
        }

        /* 玻璃拟态卡片 */
        .glass-card {
            background: rgba(15, 32, 62, 0.6);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(37, 99, 235, 0.2);
            border-radius: 1.5rem;
            transition: all 0.2s ease;
        }
        .glass-card:hover {
            border-color: rgba(34, 211, 238, 0.5);
            box-shadow: 0 25px 60px rgba(0, 0, 0, 0.4), 0 0 40px rgba(34, 211, 238, 0.15);
            transform: translateY(-6px);
        }

        /* 渐变边框 */
        .gradient-border {
            position: relative;
            background: linear-gradient(135deg, rgba(15, 32, 62, 0.9) 0%, rgba(20, 42, 82, 0.85) 100%);
            border-radius: 1.5rem;
            z-index: 1;
        }
        .gradient-border::before {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: 1.5rem;
            padding: 1.5px;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.7), rgba(34, 211, 238, 0.5), rgba(139, 92, 246, 0.4));
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
            pointer-events: none;
        }

        /* 联系渠道大卡片 */
        .channel-card {
            position: relative;
            overflow: hidden;
            border-radius: 1.5rem;
            padding: 2.5rem;
            transition: all 0.25s ease;
            cursor: pointer;
            background: rgba(15, 32, 62, 0.5);
            border: 1px solid rgba(37, 99, 235, 0.15);
        }
        .channel-card::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -50%;
            width: 100%;
            height: 100%;
            background: radial-gradient(circle, var(--channel-color, rgba(34, 211, 238, 0.15)) 0%, transparent 70%);
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .channel-card:hover::before { opacity: 1; }
        .channel-card:hover {
            transform: translateY(-8px) scale(1.02);
            border-color: var(--channel-color, rgba(34, 211, 238, 0.5));
            box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4), 0 0 50px var(--channel-glow, rgba(34, 211, 238, 0.2));
        }
        .channel-icon {
            width: 72px;
            height: 72px;
            border-radius: 1.25rem;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            margin-bottom: 1.5rem;
            position: relative;
            z-index: 1;
            transition: all 0.25s ease;
        }
        .channel-card:hover .channel-icon {
            transform: scale(1.1) rotate(-5deg);
        }
        .channel-title {
            font-size: 1.25rem;
            font-weight: 700;
            color: white;
            margin-bottom: 0.5rem;
            position: relative;
            z-index: 1;
        }
        .channel-value {
            font-size: 1.5rem;
            font-weight: 800;
            position: relative;
            z-index: 1;
            margin-bottom: 0.5rem;
        }
        .channel-desc {
            font-size: 0.875rem;
            color: #94A3B8;
            position: relative;
            z-index: 1;
        }
        .channel-arrow {
            position: absolute;
            bottom: 2rem;
            right: 2rem;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #64748B;
            transition: all 0.25s ease;
            z-index: 1;
        }
        .channel-card:hover .channel-arrow {
            background: var(--channel-color, rgba(34, 211, 238, 0.2));
            color: white;
            transform: translateX(5px);
        }

        /* 表单创新样式 - 浮动标签 */
        .form-field {
            position: relative;
            margin-bottom: 1.5rem;
        }
        .form-field label {
            position: absolute;
            left: 1.25rem;
            top: 50%;
            transform: translateY(-50%);
            color: #64748B;
            font-size: 0.95rem;
            transition: all 0.2s ease;
            pointer-events: none;
            padding: 0 0.25rem;
        }
        .form-field textarea ~ label {
            top: 1.25rem;
            transform: none;
        }
        .form-field input:focus ~ label,
        .form-field input:not(:placeholder-shown) ~ label,
        .form-field textarea:focus ~ label,
        .form-field textarea:not(:placeholder-shown) ~ label,
        .form-field select:focus ~ label,
        .form-field select.has-value ~ label {
            top: 0;
            transform: translateY(-50%) scale(0.85);
            color: var(--accent);
            background: #0F172A;
        }
        .form-field input,
        .form-field textarea,
        .form-field select {
            width: 100%;
            padding: 1.25rem;
            background: rgba(5, 11, 26, 0.7);
            border: 1.5px solid rgba(37, 99, 235, 0.25);
            border-radius: 1rem;
            color: white;
            font-size: 1rem;
            transition: all 0.2s ease;
            outline: none;
            font-family: inherit;
        }
        .form-field input:focus,
        .form-field textarea:focus,
        .form-field select:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 4px rgba(34, 211, 238, 0.1), 0 0 30px rgba(34, 211, 238, 0.1);
        }
        .form-field textarea {
            resize: vertical;
            min-height: 140px;
        }
        .form-field select {
            appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 14 14'%3E%3Cpath fill='%2322D3EE' d='M7 10L1 4h12z'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 1.25rem center;
            padding-right: 3rem;
        }
        .form-field select option {
            background: #0F172A;
            color: white;
        }

        /* 流程步骤 */
        .step-item {
            position: relative;
            padding-left: 5rem;
            padding-bottom: 2.5rem;
        }
        .step-item:last-child { padding-bottom: 0; }
        .step-item::before {
            content: '';
            position: absolute;
            left: 1.75rem;
            top: 3.5rem;
            bottom: 0;
            width: 2px;
            background: linear-gradient(180deg, rgba(34, 211, 238, 0.5), rgba(139, 92, 246, 0.2));
        }
        .step-item:last-child::before { display: none; }
        .step-number {
            position: absolute;
            left: 0;
            top: 0;
            width: 3.5rem;
            height: 3.5rem;
            border-radius: 1rem;
            background: linear-gradient(135deg, rgba(15, 76, 158, 0.4), rgba(34, 211, 238, 0.2));
            border: 1px solid rgba(34, 211, 238, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--accent);
            transition: all 0.25s ease;
        }
        .step-item:hover .step-number {
            background: var(--gradient-blue);
            color: white;
            transform: scale(1.1) rotate(-5deg);
            box-shadow: 0 0 25px rgba(34, 211, 238, 0.4);
        }
        .step-title {
            font-size: 1.125rem;
            font-weight: 700;
            color: white;
            margin-bottom: 0.375rem;
        }
        .step-desc {
            font-size: 0.9rem;
            color: #94A3B8;
            line-height: 1.6;
        }

        /* 微信二维码悬停 */
        .wechat-hover-card { position: relative; cursor: pointer; }
        .wechat-hover-card:hover,
        .wechat-hover-card.wechat-popup-open {
            overflow: visible;
            z-index: 100;
        }
        .wechat-qrcode-popup {
            position: absolute;
            left: 100%;
            top: 50%;
            transform: translateY(-50%) translateX(10px);
            background: linear-gradient(135deg, rgba(15, 32, 62, 0.98) 0%, rgba(20, 42, 82, 0.96) 100%);
            border: 1px solid rgba(7, 193, 96, 0.4);
            border-radius: 1rem;
            padding: 1rem;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.05s ease-out, visibility 0.05s ease-out, transform 0.15s ease-out;
            z-index: 9999;
            box-shadow: 0 15px 40px rgba(7, 193, 96, 0.3);
            min-width: 160px;
        }
        .wechat-hover-card:hover .wechat-qrcode-popup,
        .wechat-hover-card .wechat-qrcode-popup.show {
            opacity: 1;
            visibility: visible;
            transform: translateY(-50%) translateX(15px);
        }
        .wechat-qrcode-box {
            width: 140px;
            height: 140px;
            border: 2px dashed rgba(7, 193, 96, 0.45);
            border-radius: 0.75rem;
            background: rgba(7, 193, 96, 0.06);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            margin: 0 auto;
            position: relative;
            overflow: hidden;
        }
        .wechat-qrcode-box::before {
            content: '';
            position: absolute;
            top: 0; left: -100%;
            width: 100%; height: 100%;
            background: linear-gradient(90deg, transparent, rgba(7,193,96,0.12), transparent);
            animation: wechatScan 2s linear infinite;
        }
        .wechat-qrcode-box img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
            border-radius: 0.5rem;
            position: relative;
            z-index: 1;
        }
        @keyframes wechatScan {
            0% { left: -100%; }
            100% { left: 100%; }
        }
        .wechat-hover-tip {
            display: inline-flex;
            align-items: center;
            gap: 0.375rem;
            font-size: 0.8rem;
            color: #07C160;
            margin-top: 0.375rem;
            animation: tipPulse 2s ease-in-out infinite;
        }
        @keyframes tipPulse {
            0%, 100% { opacity: 0.7; }
            50% { opacity: 1; }
        }
        @media (max-width: 768px) {
            .wechat-qrcode-popup {
                left: 0; top: 100%;
                transform: translateY(10px) translateX(0);
                width: 100%; min-width: auto; margin-top: 0.5rem;
            }
            .wechat-hover-card:hover .wechat-qrcode-popup,
            .wechat-hover-card .wechat-qrcode-popup.show {
                transform: translateY(15px) translateX(0);
            }
        }

        /* 底部导航 */
        .footer-nav-col h4 {
            color: white;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 1.25rem;
        }
        .footer-nav-col ul { list-style: none; padding: 0; }
        .footer-nav-col li { margin-bottom: 0.625rem; }
        .footer-nav-col a {
            color: #94A3B8;
            font-size: 0.875rem;
            transition: all 0.15s ease;
            text-decoration: none;
        }
        .footer-nav-col a:hover {
            color: var(--accent);
            padding-left: 4px;
            text-shadow: 0 0 10px rgba(34, 211, 238, 0.3);
        }
        #particles-canvas {
            position: absolute;
            top: 0; left: 0;
            width: 100%; height: 100%;
            pointer-events: none;
            z-index: 1;
        }
        @media (max-width: 768px) {
            .channel-card { padding: 1.75rem; }
            .channel-icon { width: 56px; height: 56px; font-size: 1.5rem; }
        }