/* ===== 外层容器 - 100% 宽度 ===== */
        .banner-wrapper {
            width: 100%;
            max-width: 100%;
            margin: 0;
            border-radius: 0;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
            position: relative;
            overflow: hidden;
        }

        /* ===== 轮播容器 ===== */
        .carousel {
            position: relative;
            width: 100%;
            aspect-ratio: 21 / 9;          /* 宽屏比例，与 max-height 共同作用 */
            max-height: 500px;             /* 新增：限制最大高度为 500px */
            background: #1a1a2e;
            overflow: hidden;
        }

        /* ===== 幻灯片轨道 ===== */
        .slides {
            display: flex;
            width: 100%;
            height: 100%;
            transition: transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            will-change: transform;
        }

        /* ===== 每张幻灯片 ===== */
        .slide {
            flex: 0 0 100%;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            color: #fff;
            text-align: center;
            padding: 0 10%;
        }

        /* 每张 slide 独立背景 (抽象图形) */
        .slide-1 {
            background-image:
                linear-gradient(135deg, rgba(26, 26, 46, 0.65), rgba(22, 33, 62, 0.80)),
                url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"%3E%3Crect width="1200" height="600" fill="%232b2d42"/%3E%3Ccircle cx="200" cy="300" r="160" fill="%23ef476f" opacity="0.3"/%3E%3Ccircle cx="900" cy="200" r="200" fill="%23ffd166" opacity="0.2"/%3E%3Ccircle cx="600" cy="500" r="140" fill="%23118ab2" opacity="0.25"/%3E%3C/svg%3E');
        }

        .slide-2 {
            background-image:
                linear-gradient(135deg, rgba(239, 71, 111, 0.60), rgba(17, 138, 178, 0.70)),
                url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"%3E%3Crect width="1200" height="600" fill="%231a1a2e"/%3E%3Ccircle cx="300" cy="150" r="180" fill="%23ef476f" opacity="0.3"/%3E%3Ccircle cx="850" cy="400" r="220" fill="%23ffd166" opacity="0.25"/%3E%3Ccircle cx="100" cy="450" r="120" fill="%23118ab2" opacity="0.3"/%3E%3C/svg%3E');
        }

        .slide-3 {
            background-image:
                linear-gradient(135deg, rgba(255, 209, 102, 0.55), rgba(239, 71, 111, 0.65)),
                url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"%3E%3Crect width="1200" height="600" fill="%232b2d42"/%3E%3Ccircle cx="700" cy="150" r="190" fill="%23118ab2" opacity="0.3"/%3E%3Ccircle cx="200" cy="400" r="150" fill="%23ef476f" opacity="0.25"/%3E%3Ccircle cx="1000" cy="350" r="170" fill="%23ffd166" opacity="0.2"/%3E%3C/svg%3E');
        }

        .slide-4 {
            background-image:
                linear-gradient(135deg, rgba(17, 138, 178, 0.65), rgba(26, 26, 46, 0.75)),
                url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"%3E%3Crect width="1200" height="600" fill="%231a1a2e"/%3E%3Ccircle cx="500" cy="300" r="200" fill="%23ffd166" opacity="0.25"/%3E%3Ccircle cx="150" cy="150" r="130" fill="%23ef476f" opacity="0.3"/%3E%3Ccircle cx="1000" cy="450" r="180" fill="%23118ab2" opacity="0.3"/%3E%3C/svg%3E');
        }

        /* ===== 幻灯片内容 ===== */
        .slide-content {
            position: relative;
            z-index: 2;
            max-width: 700px;
            animation: fadeUp 0.8s ease forwards;
            opacity: 0;
            transform: translateY(30px);
        }

        .slide.active .slide-content {
            animation: fadeUp 0.8s ease forwards;
        }

        @keyframes fadeUp {
            0% {
                opacity: 0;
                transform: translateY(30px);
            }
            100% {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .slide-content .tag {
            display: inline-block;
            padding: 6px 22px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 1px;
            text-transform: uppercase;
            background: rgba(255, 255, 255, 0.18);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.25);
            margin-bottom: 20px;
            color: #fff;
        }

        .slide-content h2 {
            font-size: clamp(2.2rem, 6vw, 4.2rem);
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 18px;
            text-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
            letter-spacing: -0.02em;
        }

        .slide-content h2 span {
            color: #ffd166;
        }

        .slide-content p {
            font-size: clamp(1rem, 1.4vw, 1.25rem);
            line-height: 1.7;
            opacity: 0.9;
            margin-bottom: 32px;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
            font-weight: 300;
            max-width: 580px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-group {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-block;
            padding: 14px 38px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            text-decoration: none;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
        }

        .btn-primary {
            background: #fff;
            color: #1a1a2e;
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.15);
        }

        .btn-primary:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 14px 40px rgba(0, 0, 0, 0.25);
        }

        .btn-outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.5);
            backdrop-filter: blur(4px);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: #fff;
            transform: translateY(-3px);
        }

        /* ===== 导航箭头 ===== */
        .arrow {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            z-index: 20;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.20);
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            user-select: none;
        }

        .arrow:hover {
            background: rgba(255, 255, 255, 0.25);
            transform: translateY(-50%) scale(1.08);
        }

        .arrow:active {
            transform: translateY(-50%) scale(0.92);
        }

        .arrow-left {
            left: 24px;
        }

        .arrow-right {
            right: 24px;
        }

        /* ===== 指示器（圆点） ===== */
        .dots {
            position: absolute;
            bottom: 32px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 20;
            display: flex;
            gap: 12px;
        }

        .dot {
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.30);
            border: none;
            cursor: pointer;
            transition: all 0.4s ease;
            padding: 0;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.10);
        }

        .dot.active {
            background: #fff;
            transform: scale(1.25);
            box-shadow: 0 0 20px rgba(255, 255, 255, 0.4);
            border-color: #fff;
        }

        .dot:hover {
            background: rgba(255, 255, 255, 0.60);
            transform: scale(1.1);
        }

        .dot.active:hover {
            transform: scale(1.25);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 768px) {
            .carousel {
                aspect-ratio: 16 / 9;      /* 平板及以下改用 16:9 */
                max-height: 400px;          /* 适当降低最大高度，避免占用过多屏幕 */
            }

            .arrow {
                width: 40px;
                height: 40px;
                font-size: 1.2rem;
            }

            .arrow-left {
                left: 12px;
            }

            .arrow-right {
                right: 12px;
            }

            .slide-content .tag {
                font-size: 0.7rem;
                padding: 4px 16px;
            }

            .btn {
                padding: 10px 24px;
                font-size: 0.9rem;
            }

            .dots {
                bottom: 18px;
                gap: 8px;
            }

            .dot {
                width: 10px;
                height: 10px;
            }
        }

        @media (max-width: 480px) {
            .carousel {
                aspect-ratio: 4 / 3;
                max-height: 300px;
            }

            .arrow {
                width: 34px;
                height: 34px;
                font-size: 1rem;
            }

            .arrow-left {
                left: 8px;
            }

            .arrow-right {
                right: 8px;
            }

            .slide-content h2 {
                font-size: 1.6rem;
            }

            .slide-content p {
                font-size: 0.85rem;
                margin-bottom: 20px;
            }

            .btn-group {
                gap: 10px;
            }

            .btn {
                padding: 8px 18px;
                font-size: 0.8rem;
            }

            .dots {
                bottom: 12px;
                gap: 6px;
            }

            .dot {
                width: 8px;
                height: 8px;
            }
        }