.ser5 {
    position: relative;
    width: 100%;
    min-height: 320px;
    overflow: hidden;
    cursor: pointer;
    border-radius: 8px;
    margin: 20px 0;
    font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
}

.ser5 .ser5-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://img.alicdn.com/imgextra/i1/O1CN01JZKb1n1a4UxGjM5Fz_!!6000000003278-0-tps-1920-600.jpg') center center / cover no-repeat;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.ser5:hover .ser5-bg {
    transform: scale(1.08);
}

.ser5 .ser5-mask {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 52, 120, 0.85) 0%, rgba(0, 100, 180, 0.7) 50%, rgba(0, 60, 130, 0.85) 100%);
    transition: background 0.4s ease;
}

.ser5:hover .ser5-mask {
    background: linear-gradient(135deg, rgba(0, 40, 100, 0.92) 0%, rgba(0, 80, 160, 0.8) 50%, rgba(0, 50, 110, 0.92) 100%);
}

.ser5 .ser5-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    min-height: 420px;
    padding: 40px 20px;
    text-align: center;
    color: #fff;
}

.ser5 .ser5-icon {
    width: 64px;
    height: 64px;
    margin-bottom: 20px;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s ease 0.1s;
}

    .ser5 .ser5-icon svg {
        width: 100%;
        height: 100%;
        fill: #fff;
    }

.ser5.animated .ser5-icon {
    opacity: 1;
    transform: translateY(0);
}

.ser5 .ser5-title {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 16px;
    position: relative;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s ease 0.2s;
}

.ser5.animated .ser5-title {
    opacity: 1;
    transform: translateY(0);
}

.ser5 .ser5-title::after {
    content: '';
    display: block;
    width: 50px;
    height: 3px;
    background: #fff;
    margin: 12px auto 0;
    border-radius: 2px;
    transition: width 0.4s ease;
}

.ser5:hover .ser5-title::after {
    width: 80px;
}

.ser5 .ser5-desc {
    font-size: 16px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s ease 0.3s;
    padding:20px 0px;
}

.ser5.animated .ser5-desc {
    opacity: 1;
    transform: translateY(0);
}

.ser5 .ser5-btn {
    display: inline-block;
    margin-top: 24px;
    padding: 10px 32px;
    border: 2px solid rgba(255, 255, 255, 0.8);
    border-radius: 30px;
    color: #fff;
    font-size: 15px;
    letter-spacing: 1px;
    text-decoration: none;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.4s ease 0.4s;
    background: transparent;
    cursor: pointer;
}

.ser5.animated .ser5-btn {
    opacity: 1;
    transform: translateY(0);
}

.ser5 .ser5-btn:hover {
    background: #fff;
    color: #003c82;
    border-color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.ser5 .ser5-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
    z-index: 1;
}

.ser5 .ser5-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    animation: ser5Float 6s infinite ease-in-out;
}

@keyframes ser5Float {
    0%, 100% {
        transform: translateY(0) translateX(0);
        opacity: 0;
    }

    25% {
        opacity: 0.6;
    }

    50% {
        transform: translateY(-80px) translateX(20px);
        opacity: 0.3;
    }

    75% {
        opacity: 0.5;
    }
}

@media (max-width: 768px) {
    .ser5 {
        min-height: 260px;
    }

        .ser5 .ser5-content {
            min-height: 260px;
            padding: 30px 16px;
        }

        .ser5 .ser5-title {
            font-size: 22px;
        }

        .ser5 .ser5-desc {
            font-size: 14px;
        }

        .ser5 .ser5-icon {
            width: 48px;
            height: 48px;
        }
}

@media (max-width: 480px) {
    .ser5 {
        min-height: 220px;
    }

        .ser5 .ser5-content {
            min-height: 220px;
            padding: 24px 12px;
        }

        .ser5 .ser5-title {
            font-size: 20px;
            letter-spacing: 1px;
        }

        .ser5 .ser5-desc {
            font-size: 13px;
            line-height: 1.6;
        }

        .ser5 .ser5-btn {
            padding: 8px 24px;
            font-size: 13px;
        }
}