.banner {
            width: 900px;
            height: 120px;
            position: relative;
            overflow: hidden;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 40px;
        }

        /* 点击跳转 */
        .banner-link {
            display: block;
            width: 100%;
            height: 100%;
            position: absolute;
            top: 0;
            left: 0;
            z-index: 100;
            cursor: pointer;
            text-decoration: none;
        }

        .banner-link:hover {
            box-shadow: inset 0 0 40px rgba(0, 176, 255, 0.1);
        }

        /* 通用动画 */
        @keyframes pulse {
            0%, 100% { opacity: 0.6; transform: scale(1); }
            50% { opacity: 0.8; transform: scale(1.05); }
        }

        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-6px); }
        }

        @keyframes floatSlow {
            0%, 100% { transform: translateY(0) translateX(0); }
            33% { transform: translateY(-10px) translateX(5px); }
            66% { transform: translateY(5px) translateX(-5px); }
        }

        @keyframes floatFast {
            0%, 100% { transform: translateY(0) scale(1); }
            50% { transform: translateY(-15px) scale(1.1); }
        }

        @keyframes rotate {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        @keyframes blink {
            0%, 100% { opacity: 0.3; transform: scale(0.8); }
            50% { opacity: 0.9; transform: scale(1.2); }
        }

        /* Logo */
        .logo-section {
            display: flex;
            align-items: center;
            gap: 20px;
            z-index: 2;
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
        }

        .logo-icon {
            width: 48px;
            height: 48px;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .logo-icon-inner {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            animation: float 3s ease-in-out infinite;
        }

        .logo-main {
            font-size: 58px;
            font-weight: 800;
            display: flex;
            align-items: baseline;
            gap: 6px;
        }

        .logo-main .ai {
            background: linear-gradient(90deg, #ff6b6b, #feca57, #48dbfb, #ff9ff3, #9b59b6, #ff6b6b);
            background-size: 200% auto;
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            animation: rainbowText 3s linear infinite;
        }

        .logo-main .nav {
            background: linear-gradient(135deg, #80d8ff, #00b0ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        @keyframes rainbowText {
            0% { background-position: 0% 50%; }
            100% { background-position: 200% 50%; }
        }

        .right-domain {
            position: absolute;
            right: 40px;
            font-size: 14px;
            color: rgba(128, 216, 255, 0.85);
            z-index: 2;
            text-align: right;
            line-height: 1.6;
        }

        /* 装饰圆 */
        .deco-circle {
            position: absolute;
            border-radius: 50%;
            pointer-events: none;
        }

        .deco-circle-1 {
            animation: floatSlow 6s ease-in-out infinite;
        }

        .deco-circle-2 {
            animation: floatFast 4s ease-in-out infinite;
        }

        .deco-circle-3 {
            width: 80px;
            height: 80px;
            opacity: 0.2;
            animation: rotate 20s linear infinite, float 5s ease-in-out infinite;
        }

        .deco-circle-4 {
            width: 50px;
            height: 50px;
            opacity: 0.25;
            animation: blink 2s ease-in-out infinite;
        }

        .deco-ring {
            position: absolute;
            border-radius: 50%;
            border: 2px solid;
            opacity: 0.15;
            pointer-events: none;
            animation: rotate 15s linear infinite;
        }

        /* 粒子 */
        .particle {
            position: absolute;
            border-radius: 50%;
            opacity: 0.7;
        }

        .particle-sm {
            width: 3px;
            height: 3px;
            animation: float 3s ease-in-out infinite;
        }

        .particle-md {
            width: 6px;
            height: 6px;
            animation: floatSlow 4s ease-in-out infinite;
        }

        .particle-lg {
            width: 10px;
            height: 10px;
            opacity: 0.4;
            animation: blink 2.5s ease-in-out infinite;
        }

        .particle-glow {
            width: 20px;
            height: 20px;
            opacity: 0.2;
            filter: blur(5px);
            animation: floatFast 3s ease-in-out infinite;
        }

        /* ========== V2: 深蓝科技 赛博朋克 ========== */
        .v2 {
            background: linear-gradient(135deg, #0c0c1e 0%, #1a237e 50%, #2d2d7a 100%);
        }

        .v2 .logo-icon-inner {
            background: linear-gradient(135deg, #00b0ff, #80d8ff);
            color: #0c0c1e;
            box-shadow: 0 4px 20px rgba(0, 176, 255, 0.4);
        }

        .v2 .deco-circle-1 {
            width: 180px;
            height: 180px;
            background: #00b0ff;
            top: -70px;
            left: -50px;
            animation: pulse 4s ease-in-out infinite;
        }

        .v2 .deco-circle-2 {
            width: 140px;
            height: 140px;
            background: #7c4dff;
            bottom: -55px;
            left: 60px;
            animation: pulse 5s ease-in-out infinite 1s;
        }

        .v2 .particle { background: rgba(0, 176, 255, 0.8); }